WO1987005614A1 - Polymer mixture with pc and hips - Google Patents
Polymer mixture with pc and hips Download PDFInfo
- Publication number
- WO1987005614A1 WO1987005614A1 PCT/US1987/000471 US8700471W WO8705614A1 WO 1987005614 A1 WO1987005614 A1 WO 1987005614A1 US 8700471 W US8700471 W US 8700471W WO 8705614 A1 WO8705614 A1 WO 8705614A1
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- WIPO (PCT)
- Prior art keywords
- rubber
- polymer mixture
- modified polystyrene
- polystyrene
- aromatic polycarbonate
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
- C08L69/005—Polyester-carbonates
Definitions
- the invention relates to a polymer mixture which comprises an aromatic polycarbonate and a rubber-modified polystyrene.
- Polymer mixtures which comprise an aromatic polycarbonate and a rubber-modified polystyrene are known from WO-A 80/00027 and EP-A-0058929.
- the rubber-modified polystyrene as described in the examples of EP-A-0058929 has an average particle size of the "Weichkomponente" (soft-component) of 2-3 micrometres.
- the invention provides polymer mixtures as described hereinbefore and having improved mechanical properties, in particular having a greater ductility.
- the polymer mixture according to the invention is characterized in that it comprises a rubber-modified polystyrene built up from a. polystyrene matrix having rubber-like particles uniformly distributed therein of (co)polymerisates built up substantially of 1,3-dienes with a capsule particle morphology, the particles having an average particle size (d 50 -value of the integral mass distribution) of 0.2-0.6 micrometres.
- the polymer mixtures according to the invention may comprise 1-99% by weight, preferably 50-99% by weight, of aromatic polycarbonate and 99-1% by weight, preferably 1-50% by weight, of rubber-modified polystyrene calculated with respect to the sum of the polycarbonate and the polystyrene.
- the polymer mixture according to the invention may comprise an agent to improve the impact strength.
- an agent to improve the impact strength By adding such an agent, a noticeable improvement of the notch impact strength is obtained, even when a comparatively small quantity of, for example, 1-5 parts by weight per 100 parts by weight of aromatic polycarbonate plus polystyrene is added.
- the polymer mixture according to the invention may moreover comprise an agent to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene.
- an agent to improve the bonding is preferably used as an agent to improve the bonding a styrene polymer with free carboxyl groups obtained by polymerisation in the presence of an unsaturated carboxylic acid monomer.
- the polymer mixtures according to the invention may be manufactured according to the conventional techniques of preparing polymer mixtures, for example, by means of mixers and extruders.
- the polymer mixtures may be further processed according to the methods conventionally used for thermoplastic materials, for example, injection moulding, extrusion, and blow moulding. A combination of such methods may also be used, for example, extrusion-blow-moulding.
- the polymer mixture according to the invention comprises at any rate the following two constituents :
- Aromatic polycarbonates are materials known per se . They are generally prepared by reacting a dihydric phenol compound with a carbonate precursor , for example, phosgene, a halogen formiate or a carbonate ester . Aromatic polycarbonates are polymers which comprise units of the formula
- A is a bivalent aromatic radical which is derived from the dihydric phenol which is used in the preparation of the polymer.
- the polycarbonates used generally have an intrinsic viscosity of approximately 0.30 to approximately 1.00 dl/g (measured in methylene chloride at 25o C).
- dihydric phenols may be used in the preparation of the aromatic polycarbonates mononuclear or polynuclear aromatic compounds which comprise two hydroxy radicals which are each linked directly to carbon atom of an aromatic nucleus.
- dihydric phenols examples include: 2,2-bis-(4-hydroxyphenyl) ⁇ ropane; hydroquinone; resorcinol; 2 ,2-bis(4-hydroxyphenyl)pentane; 2,4'-(dihydroxyphenyl)methane; bis-(2-hydroxyphenyl)methane; bis-(4-hydroxyphenyl)methane; bis-(4-hydroxy-5-nitrophenyl)methane; 1,1-bis(4-hydroxyphenyl)ethane; 3,3-bis(4-hydroxyphenyl)pentane; 2,2-dihydroxyphenyl; 2,6-dihydroxynaphthalene; bis-(4-hydroxydiphenyl)sulphone; bis-(3,5-diethyl-4-hydroxyphenyl)sulphone; 2,2-bis (3,5-dimethyl-4-hydroxyphenyl)propane; 2,4'-dihydroxyphenyl sulphone; 5'-chloro-2,4---
- the aromatic polycarbonates can be prepared in a manner known per se; for example, by reacting a dihydric phenol with a carbonate precursor, for example, phosgene.
- a carbonate precursor for example, phosgene.
- phosgene for example, phosgene.
- Suitable aromatic polycarbonates are also the so-called polyester carbonates which are obtained by performing the polymerisation reaction in the presence of an ester precursor, for example, a difunctional carboxylic acid, for example, terephthalic acid or an ester-forming derivative thereof. These polyester carbonates have ester bonds and carbonate bonds in the polymeric chain. Polyester carbonates are described, for example, in US-A-3, 169,121.
- the polymer mixture according to the invention comprises a rubber-modified polystyrene of a particular type, namely a rubber-modified polystyrene built up from a polystyrene matrix with uniformly distributed therein rubber-like particles of (co)polymerisates built up substantially of 1,3-dienes with a capsule particle morphology, the particles having an average particle size (d 50 -value of the cumulative mass distribution) of 0.2-0.6 micrometres.
- Average particle size is to be understood to mean the average particle diameter of the d 50 -value of the cumulative mass distribution.
- the actual determination of the particle size is carried out according to a method known per se by measuring the particles in electron micrograph (see F. Lenz, Zeitschrift flir mike Mikroskopie, 63 (1956), 50-56).
- the rubber-like copolymerisate must have a so-called capsule particle morphology. In Angew.Makromolekulare Chemie 58/59 (1977), pjo. 175-198 the said morphology and the way in which this can be obtained are described.
- the content of rubber-like particles corresponding to the content of gel phase or soft component, is preferably 3-40% by weight caculated with respect to the quantity of rubber-modified polystyrene.
- the (co)polymerisate present in the rubber-like particles usually consists of polybutadiene or a butadiene-styrene copolymer or block copolymer.
- Polystyrene is to be understood to include not only the homopolymers of styrene, but all polymers or co-polymers which are built up for more than 50 mol.% from vinylaromatic monomers, for example, styrene and styrene compounds substituted in the nucleus or in the side chain with halogen atoms or lower alkyl groups.
- the polymer mixture according to the invention may moreover comprise one or more compounds selected from the following groups of compounds:
- thermoplastic synthetic resins E) conventional additives for thermoplastic synthetic resins.
- vinylaromatic polybutadiene di- or triblock copolymers As agents to improve the impact strength may be mentioned, for example, vinylaromatic polybutadiene di- or triblock copolymers. These block copolymers may be non-hydrogenated or be partially hydrogenated. Partially hydrogenated or non-hydrogenated linear styrene-butadiene di- or triblock copolymers or also the partially hydrogenated or non-partially hydrogenated radial styrene-butadiene block copolymers may be mentioned by name.
- suitable agents are, for example, the so-called core-shell polymers. These polymers are built up from a rubber-like core, for example, predominantly of an acrylate rubber or a diene rubber around which one or more shells of rigid thermoplasts are provided. The shell may be prepared, for example, from styrene and/or acrylonitrile and/or alkylmethacrylates. Further suitable agents are ABS, ASA, MBS, APM, EDPK and the like. The use of MBS in polymer mixtures which comprise an aromatic polycarbonate and a polystyrene is known per se from WO 80/00027.
- the polymer mixture according to the invention may also comprise an agent to improve the bonding between aromatic polycarbonate and the rubber-modified polystyrene.
- an agent to improve the bonding between aromatic polycarbonate and the rubber-modified polystyrene is also suitable to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene. This better bonding results in a shift of the transition temperature between brittle and ductile fracture behaviour towards lower temperatures.
- the polymer mixture according to the invention may comprise one or more of the conventional ⁇ ynthetic re ⁇ ins, for example, fillers, reinforcing fibres, for example, glass fibres, mould release agents, flame retarding agents, pigments, dyes, stabilizers.
- fillers for example, fillers, reinforcing fibres, for example, glass fibres, mould release agents, flame retarding agents, pigments, dyes, stabilizers.
- a second rubber-modified polystyrene (HIPS II) was used with a capsule morphology and with a particle size of the rubber-like particles of approximately 0.3 micrometres.
- the polymer mixtures were prepared by dry-mixing the constituents mentioned in table A (in comparative example A only the polycarbonate) and extruding at 280o C. The formed extrudate was reduced to pellets. The pellets were formed in an injection moulding machine (at approximately 300o C) to a number of standard test rods for determining 1/8 inch (3.2 mm) notched Izod impact value (ASTM D 256). The values found for the notched Izod impact strength are also recorded in Table A. TABLE A
- composition parts by weight
- Examples IV and V a par tially hydrogenated styrene-butadiene-styrene triblock copolymer (Kraton G 1650); in Examples VI and VII an ethylene-propylene rubber (BA-616); in Examples VIII and IX a methyl methacrylate-butadiene-styrene polymer (MBS-Acryloid® of Rohm and Haas Company, U.S.A.).
- the polymer mixture ⁇ and the test rods were prepared in the same manner as in the Examples I to III.
- composition of the polymer mixtures, as well as the Izod impact value are recorded in Table B hereinafter.
- composition (parts by weight )
- Example XI and XII Three polymer mixtures were prepared starting from the same aromatic polycarbonate and HIPS II as used in Example I. Moreover, in Examples XI and XII an agent to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene was used. In Examples XI and XII a polymer mixture on the basis of a styrene-maleic acid anhydride with a little methacrylate (bonding agent 1). Bonding agent 1 is commercially available (HV-KR 2680 from BASF aktiengesell-schaft). The polymer mixtures were extruded at 300o C and injection moulded at 300° C. The Izod impact strength of the rods was determined at 23o C; 0o C and -10o C. The composition of the polymer mixtures and the Izod impact strength are recorded in Table C below.
- composition parts by weight
- the Izod impact value was always determined of a number a rods. For large diffexences, the minimum value and the maximum value as found are recorded.
Abstract
Polymer mixtures which comprise an aromatic polycarbonate and a rubber-modified polystyrene. The polystyrene used is characterized by a particular structure: a polystyrene matrix having dispersed therein rubber-like particles with a capsule morphology and an average particle size from 0.2 to 0.6 micrometres.
Description
Polymer mixture with PC and HIPS
The invention relates to a polymer mixture which comprises an aromatic polycarbonate and a rubber-modified polystyrene.
Polymer mixtures which comprise an aromatic polycarbonate and a rubber-modified polystyrene are known from WO-A 80/00027 and EP-A-0058929. The rubber-modified polystyrene as described in the examples of EP-A-0058929 has an average particle size of the "Weichkomponente" (soft-component) of 2-3 micrometres.
The invention provides polymer mixtures as described hereinbefore and having improved mechanical properties, in particular having a greater ductility.
The polymer mixture according to the invention is characterized in that it comprises a rubber-modified polystyrene built up from a. polystyrene matrix having rubber-like particles uniformly distributed therein of (co)polymerisates built up substantially of 1,3-dienes with a capsule particle morphology, the particles having an average particle size (d50-value of the integral mass distribution) of 0.2-0.6 micrometres.
The polymer mixtures according to the invention may comprise 1-99% by weight, preferably 50-99% by
weight, of aromatic polycarbonate and 99-1% by weight, preferably 1-50% by weight, of rubber-modified polystyrene calculated with respect to the sum of the polycarbonate and the polystyrene.
In addition to the constituents mentioned hereinbefore, the polymer mixture according to the invention may comprise an agent to improve the impact strength. By adding such an agent, a noticeable improvement of the notch impact strength is obtained, even when a comparatively small quantity of, for example, 1-5 parts by weight per 100 parts by weight of aromatic polycarbonate plus polystyrene is added.
The polymer mixture according to the invention may moreover comprise an agent to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene. The use of such agents presents the advantage that the temperature at which the fracture behaviour changes from ductile to brittle (the so-called ductile-brittle transition temperature) is moved to lower values. As an agent to improve the bonding is preferably used a styrene polymer with free carboxyl groups obtained by polymerisation in the presence of an unsaturated carboxylic acid monomer.
The polymer mixtures according to the invention may be manufactured according to the conventional techniques of preparing polymer mixtures, for example, by means of mixers and extruders. The polymer mixtures may be further processed according to the methods conventionally used for thermoplastic materials, for example, injection moulding, extrusion, and blow moulding. A combination of such methods may also be used, for example, extrusion-blow-moulding.
The polymer mixture according to the invention comprises at any rate the following two constituents :
A. an aromatic polycarbonate and
B . a rubber-modified polystyrene .
A . Aromatic polycarbonate
Aromatic polycarbonates are materials known per se . They are generally prepared by reacting a dihydric phenol compound with a carbonate precursor , for example, phosgene, a halogen formiate or a carbonate ester . Aromatic polycarbonates are polymers which comprise units of the formula
wherein A is a bivalent aromatic radical which is derived from the dihydric phenol which is used in the preparation of the polymer. The polycarbonates used generally have an intrinsic viscosity of approximately 0.30 to approximately 1.00 dl/g (measured in methylene chloride at 25º C). As dihydric phenols may be used in the preparation of the aromatic polycarbonates mononuclear or polynuclear aromatic compounds which comprise two hydroxy radicals which are each linked directly to carbon atom of an aromatic nucleus.
Examples of suitable dihydric phenols are: 2,2-bis-(4-hydroxyphenyl)ρropane; hydroquinone; resorcinol; 2 ,2-bis(4-hydroxyphenyl)pentane; 2,4'-(dihydroxyphenyl)methane; bis-(2-hydroxyphenyl)methane; bis-(4-hydroxyphenyl)methane; bis-(4-hydroxy-5-nitrophenyl)methane; 1,1-bis(4-hydroxyphenyl)ethane; 3,3-bis(4-hydroxyphenyl)pentane; 2,2-dihydroxyphenyl; 2,6-dihydroxynaphthalene; bis-(4-hydroxydiphenyl)sulphone; bis-(3,5-diethyl-4-hydroxyphenyl)sulphone; 2,2-bis
(3,5-dimethyl-4-hydroxyphenyl)propane; 2,4'-dihydroxyphenyl sulphone; 5'-chloro-2,4--dihydroxydiphenyl sulphone; bis-(4-hydroxyphenyl)diphenyl sulphone; 4,4'-dihydroxydiphenyl ether; 4,4'dihydroxy-3,3-dichlorodiphenyl ether; 4,4'-dihydroxy-2,5-dihydroxydiphenyl ether.
Other, likewise suitable, dihydric phenols are disclosed in US-A 2,999,835; 3,038,365; 3,334,154, and 4,131,575.
The aromatic polycarbonates can be prepared in a manner known per se; for example, by reacting a dihydric phenol with a carbonate precursor, for example, phosgene. For this purpose there may be referred to the United States Patent Specifications just mentioned and to US-A 4,018,750 and 4,123,426. They may also be prepared by a transesterification as described in US-A-3,153,008.
The known branched polycarbonates as described, for example, in US-A-4, 001, 184 are also suitable.
Suitable aromatic polycarbonates are also the so-called polyester carbonates which are obtained by performing the polymerisation reaction in the presence of an ester precursor, for example, a difunctional carboxylic acid, for example, terephthalic acid or an ester-forming derivative thereof. These polyester carbonates have ester bonds and carbonate bonds in the polymeric chain. Polyester carbonates are described, for example, in US-A-3, 169,121.
It is also possible in the polymer mixture according to the invention to use a mixture of different polycarbonates as mentioned hereinbefore as an aromatic polycarbonate.
B. Rubber-modified polystyrene
The polymer mixture according to the invention comprises a rubber-modified polystyrene of a particular type, namely a rubber-modified polystyrene built up from a polystyrene matrix with uniformly distributed therein rubber-like particles of (co)polymerisates built up substantially of 1,3-dienes with a capsule particle morphology, the particles having an average particle size (d50-value of the cumulative mass distribution) of 0.2-0.6 micrometres.
Average particle size is to be understood to mean the average particle diameter of the d50-value of the cumulative mass distribution. The actual determination of the particle size is carried out according to a method known per se by measuring the particles in electron micrograph (see F. Lenz, Zeitschrift flir wissenschaftliche Mikroskopie, 63 (1956), 50-56). The rubber-like copolymerisate must have a so-called capsule particle morphology. In Angew.Makromolekulare Chemie 58/59 (1977), pjo. 175-198 the said morphology and the way in which this can be obtained are described.
In the rubber-modified polystyrene, the content of rubber-like particles, corresponding to the content of gel phase or soft component, is preferably 3-40% by weight caculated with respect to the quantity of rubber-modified polystyrene.
The (co)polymerisate present in the rubber-like particles usually consists of polybutadiene or a butadiene-styrene copolymer or block copolymer.
Polystyrene is to be understood to include not only the homopolymers of styrene, but all polymers or co-polymers which are built up for more than 50 mol.% from vinylaromatic monomers, for example, styrene and styrene compounds substituted in the nucleus or in the side chain with halogen atoms or lower alkyl groups.
The polymer mixture according to the invention may moreover comprise one or more compounds selected from the following groups of compounds:
C) agents to improve the impact strength, and/or
D) agents to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene and/or
E) conventional additives for thermoplastic synthetic resins.
C. Agents to improve the impact strength
As agents to improve the impact strength may be mentioned, for example, vinylaromatic polybutadiene di- or triblock copolymers. These block copolymers may be non-hydrogenated or be partially hydrogenated. Partially hydrogenated or non-hydrogenated linear styrene-butadiene di- or triblock copolymers or also the partially hydrogenated or non-partially hydrogenated radial styrene-butadiene block copolymers may be mentioned by name.
Further suitable agents are, for example, the so-called core-shell polymers. These polymers are built up from a rubber-like core, for example, predominantly of an acrylate rubber or a diene rubber around which one or more shells of rigid thermoplasts are provided. The shell may be prepared, for example, from styrene and/or acrylonitrile and/or alkylmethacrylates.
Further suitable agents are ABS, ASA, MBS, APM, EDPK and the like. The use of MBS in polymer mixtures which comprise an aromatic polycarbonate and a polystyrene is known per se from WO 80/00027.
D. Agents to improve the bonding between aromatic polycarbonate and rubber-modified polystyrene.
The polymer mixture according to the invention may also comprise an agent to improve the bonding between aromatic polycarbonate and the rubber-modified polystyrene. Unexpectedly it has been found that the generally known, commercially available agents to improve the bonding between polystyrene and other thermoplasts such as PVC; PA; PE; PP and the like are also suitable to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene. This better bonding results in a shift of the transition temperature between brittle and ductile fracture behaviour towards lower temperatures.
These known means to improve the bonding between various polymers usually consist of one or more polymers and/or copolymers which on the one hand are built up from units derived from a vinylaromatic compound, for example, styrene, and on the other hand units derived from a monomer with free carboxyl groups such as maleic acid anhydride, acrylic acid and/or methacrylic acid. In addition these agents may comprise polymers with units derived from acrylate esters. Agents of this type are disclosed, for example, in the following patent publications: BE 833-803; DE-A-2236903; DE-A-2029028; DE-A-2703078 and DE-A-2753697. They are marketed by the BASF Aktiengesellschaft, for example, under the indications KR 2680; KR 2681; KR 2682; KR 2683; KR 2684 and KR 2685.
E. Conventional additives for thermoplastic synthetic resin .
In addition to the above-mentioned constituents, the polymer mixture according to the invention may comprise one or more of the conventional εynthetic reεins, for example, fillers, reinforcing fibres, for example, glass fibres, mould release agents, flame retarding agents, pigments, dyes, stabilizers.
The invention will now be described in greater detail with reference to the ensuing specific examples: Examples I, II and III and comparative examples A, B and C.
Six different polymer mixtures were prepared having compositions as indicated in table A hereinafter. In all six polymer mixtures, an aromatic polycarbonate was used derived from 2,2-bis-(4-hydroxyphenyl)-propane and phosgene with intrinsic viscosity of 51 ml/g measured in methylene chloride at 25º C. In the comparative examples B and C, a first rubber-modified polystyrene (HIPS I) was used having a particle size of the rubber-like particles of approximately two micrometres and with a usual morphology (salami structure). In examples I, II and III according to the invention, a second rubber-modified polystyrene (HIPS II) was used with a capsule morphology and with a particle size of the rubber-like particles of approximately 0.3 micrometres. The polymer mixtures were prepared by dry-mixing the constituents mentioned in table A (in comparative example A only the polycarbonate) and extruding at 280º C. The formed extrudate was reduced to pellets. The pellets were formed in an injection moulding machine (at approximately 300º C) to a number of standard test rods for determining 1/8 inch (3.2 mm) notched Izod impact value (ASTM D 256). The values found for the notched Izod impact strength are also recorded in Table A.
TABLE A
Example II III B
Composition (parts by weight)
Aromatic polycarbonate 98 80 60 100 98 80
HIPS I * - - - - 2 20
HIPS II ** 2 20 40 - - -
Properties
Izod impact (J/m) 710 410 400 800 630 250
* particle size 2 micrometres; salami structure
** particle size 0.3 micrometres; capsule morphology.
It may be seen from Table A that the addition of a small quantity of rubber-modified polystyrene to polycarbonate leads to a decrease of the Izod impact strength (compare example A with Example I and example B). By comparing Example I with example B and Example II with example C it will be obvious that the use of a rubber-modified polystyrene with a particle size of 0.3 micrometres and a capsule morphology (HIPS II) results in a better Izod impact strength than the use of the conventional rubber-modified polystyrene (HIPS I).
Examples IV to IX.
Six different polymer mixtures were prepared starting from the same aromatic polycarbonate and the same HIPS II (rubber-modified polystyrene with a capsule morphology having an average particle size of 0.3 micro-metres) as in the Examples I, II and III. Moreover, an agent to improve the impact strength was added to each of the six polymer mixtures: in Examples IV and V a par
tially hydrogenated styrene-butadiene-styrene triblock copolymer (Kraton G 1650); in Examples VI and VII an ethylene-propylene rubber (BA-616); in Examples VIII and IX a methyl methacrylate-butadiene-styrene polymer (MBS-Acryloid® of Rohm and Haas Company, U.S.A.).
The polymer mixtureε and the test rods were prepared in the same manner as in the Examples I to III.
The composition of the polymer mixtures, as well as the Izod impact value are recorded in Table B hereinafter.
TABLE A
Example III IV V VI VII VIII IX
Composition (parts by weight )
Polycarbonate 60 58 56 58 56 58 56
HIPS II 40 40 40 40 40 40 40
Triblock copolymer - 2 4 - - - -
Ethylene-propylene rubber - - - 2 4 - -
MBS - - - - - 2 4
Properties
Izod impact (j/m) 400 420 430 470 580 500 500
It may be seen from a comparison of Examples IV to IX with Example II that the addition of a comparatively small quantity of a thermoplastic rubber leads to an improvement of the Izod impact strength.
Examples X, XI and XII.
Three polymer mixtures were prepared starting from the same aromatic polycarbonate and HIPS II as used in Example I. Moreover, in Examples XI and XII an agent to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene was used. In Examples XI and XII a polymer mixture on the basis of a styrene-maleic acid anhydride with a little methacrylate (bonding agent 1). Bonding agent 1 is commercially available (HV-KR 2680 from BASF aktiengesell-schaft).
The polymer mixtures were extruded at 300º C and injection moulded at 300° C. The Izod impact strength of the rods was determined at 23º C; 0º C and -10º C. The composition of the polymer mixtures and the Izod impact strength are recorded in Table C below.
TABLE C
Example XI XII
Composition (parts by weight)
Polycarbonate 80 80 80 HIPS II 20 19 18 Bonding agent 1 - 1 2
Properties
Izod impact * (J/m)
23º C 620 780/530 800/550
0º C 200 680/300 680/320
-10º C 145 300 650/320
* The Izod impact value was always determined of a number a rods. For large diffexences, the minimum value and the maximum value as found are recorded.
It may be seen from the values of Table C that the addition of a bonding agent results in a better value for the Izod impact value at lower temperature.
Claims
1. A polymer mixture Which comprises an aromatic polycarbonate and rubber-modified polystyrene, characterized in that the polymer mixture comprises a rubber-modified polystyrene built up from a polystyrene matrix having uniformly distributed therein rubber-like particles of (co)polymeriεates built up substantially from 1,3-dienes with a capsule particle morphology in which the particles have an average particle size (d50-value of the cumulative mass distribution) from 0.2 to 0.6 micrometres.
2. A polymer mixture as claimed in Claim 1, characterized in that the polymer mixture comprises 1-99% by weight of aromatic polycarbonate and 99-1% by weight of rubber-modified polystyrene calculated with respect to the sum of the polycarbonate and the polystyrene.
3. A polymer mixture as claimed in Claims 1-2, characterized in that the polymer mixture comprises a rubber-modified polystyrene with 3-30% by weight of rubber-like particles calculated with respect to the overall quantity of rubber-modified polystyrene.
4. A polymer mixture as claimed in Claims 1-3, characterized in that the polymer mixture further comprises an agent to improve the impact strength.
5. A polymer mixture as claimed in Claims 1-4, characterized in that the polymer mixture further comprises an agent to improve the bonding between the aromatic polycarbonate and the rubber-modified polystyrene.
6. A polymer mixture as claimed in Claim 5, characterized in that the polymer mixture comprises as an agent to improve the bonding a styrene polymer with free carboxyl groups obtained by polymerisation in the presence of an unsaturated carboxylic acid monomer.
7. Articles formed from the polymer mixture as claimed in Claims 1-6.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8600671 | 1986-03-17 | ||
NL8600671A NL8600671A (en) | 1986-03-17 | 1986-03-17 | POLYMER MIXTURE WITH PC AND HIPS. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1987005614A1 true WO1987005614A1 (en) | 1987-09-24 |
Family
ID=19847719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1987/000471 WO1987005614A1 (en) | 1986-03-17 | 1987-03-12 | Polymer mixture with pc and hips |
Country Status (6)
Country | Link |
---|---|
US (1) | US4748203A (en) |
EP (1) | EP0240038B1 (en) |
JP (1) | JPS63502836A (en) |
DE (1) | DE3764687D1 (en) |
NL (1) | NL8600671A (en) |
WO (1) | WO1987005614A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4775717A (en) * | 1987-10-26 | 1988-10-04 | General Electric Company | Process of mixing melts of amorphous polyester and a graft modified polystyrene and composition thereof |
US4804711A (en) * | 1987-10-26 | 1989-02-14 | General Electric Company | Melt blending of a carboxy terminated polystyrene oligomer with an aromatic polyester |
US5180780A (en) * | 1989-01-12 | 1993-01-19 | Idemitsu Petrochemical Company Limited | Rubber-modified styrene-based copolymer |
NL9002379A (en) * | 1990-11-01 | 1992-06-01 | Stamicarbon | POLYMER MIXTURE CONTAINING AN AROMATIC POLYCARBONATE RESIN AND AN IMPROVEMENT AGENCY. |
DE4141319A1 (en) * | 1991-12-14 | 1993-10-14 | Roehm Gmbh | High impact polymer blends |
US5367021A (en) * | 1993-01-14 | 1994-11-22 | General Electric Company | Polymer mixture composed of an aromatic polycarbonate, optionally a polyalkyleneterephthalate and a graft copolymer |
TW377367B (en) * | 1994-06-21 | 1999-12-21 | Asahi Kasei Corp | Aromatic polycarbonate-styrene polymer resin composition |
US6066686A (en) * | 1996-07-05 | 2000-05-23 | Daicel Chemical Industries, Ltd. | Polycarbonate compositions |
JPH10310694A (en) * | 1997-05-14 | 1998-11-24 | Daicel Chem Ind Ltd | Thermoplastic resin composition |
EP0953604A3 (en) * | 1998-04-27 | 2001-04-11 | Techno Polymer Co., Ltd. | Thermoplastic resin composition |
EP0990679B1 (en) * | 1998-09-29 | 2004-01-28 | Idemitsu Petrochemical Co., Ltd. | Thermoplastic resin compositons and their injection moldings |
US7323528B2 (en) * | 2002-07-19 | 2008-01-29 | Cid Centro De Investigacion Y Desarrollo Tecnologico, S.A. De C.V. | Block copolymers containing functional groups |
EP1561541B1 (en) * | 2004-02-05 | 2008-04-30 | JSR Corporation | Chemical mechanical polishing pad and polishing process |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4101504A (en) * | 1977-04-13 | 1978-07-18 | General Electric Company | High impact compositions of a polyphenylene ether resin and alkenyl aromatic resins modified with EPDM rubber |
US4469843A (en) * | 1982-05-19 | 1984-09-04 | Atlantic Richfield Company | Molding composition comprising modified styrene-maleic anhydride copolymer and polycarbonate |
JPS59187052A (en) * | 1983-04-06 | 1984-10-24 | Mitsui Toatsu Chem Inc | Polycarbonate resin composition |
US4617345A (en) * | 1984-08-20 | 1986-10-14 | General Electric Company | Polymer mixture which comprises an aromatic polycarbonate resin and an impact strength-improving agent |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4081424A (en) * | 1976-06-07 | 1978-03-28 | Shell Oil Company | Multicomponent polyolefin - block copolymer - polymer blends |
DE3035551A1 (en) * | 1980-09-20 | 1982-05-06 | Basf Ag, 6700 Ludwigshafen | THERMOPLASTIC MOLDS |
DE3106758A1 (en) * | 1981-02-24 | 1982-09-09 | Basf Ag, 6700 Ludwigshafen | METHOD FOR PRODUCING A MIXTURE FROM POLYCARBONATES AND POLYMERISATES CONTAINING STYRENE, USE OF THE MIXTURE AND MOLDED PARTS THEREOF |
US4584338A (en) * | 1982-01-29 | 1986-04-22 | General Electric Company | High impact strength polycarbonate resin composition |
US4477627A (en) * | 1983-10-27 | 1984-10-16 | General Electric Company | Gel impact modified polycarbonate resin compositions |
DE3414119A1 (en) * | 1984-04-14 | 1985-10-24 | Basf Ag, 6700 Ludwigshafen | THERMOPLASTIC MOLDS |
-
1986
- 1986-03-17 NL NL8600671A patent/NL8600671A/en not_active Application Discontinuation
-
1987
- 1987-01-21 EP EP87200085A patent/EP0240038B1/en not_active Expired
- 1987-01-21 DE DE8787200085T patent/DE3764687D1/en not_active Expired - Fee Related
- 1987-03-06 US US07/023,053 patent/US4748203A/en not_active Expired - Fee Related
- 1987-03-12 JP JP62501762A patent/JPS63502836A/en active Pending
- 1987-03-12 WO PCT/US1987/000471 patent/WO1987005614A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4101504A (en) * | 1977-04-13 | 1978-07-18 | General Electric Company | High impact compositions of a polyphenylene ether resin and alkenyl aromatic resins modified with EPDM rubber |
US4469843A (en) * | 1982-05-19 | 1984-09-04 | Atlantic Richfield Company | Molding composition comprising modified styrene-maleic anhydride copolymer and polycarbonate |
JPS59187052A (en) * | 1983-04-06 | 1984-10-24 | Mitsui Toatsu Chem Inc | Polycarbonate resin composition |
US4617345A (en) * | 1984-08-20 | 1986-10-14 | General Electric Company | Polymer mixture which comprises an aromatic polycarbonate resin and an impact strength-improving agent |
Also Published As
Publication number | Publication date |
---|---|
NL8600671A (en) | 1987-10-16 |
DE3764687D1 (en) | 1990-10-11 |
EP0240038A1 (en) | 1987-10-07 |
EP0240038B1 (en) | 1990-09-05 |
JPS63502836A (en) | 1988-10-20 |
US4748203A (en) | 1988-05-31 |
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