WO1997002314A1 - Thermoplastische formmassen sowie ein verfahren zur reduzierung der bildung von restmonomeren in diesen formmassen - Google Patents
Thermoplastische formmassen sowie ein verfahren zur reduzierung der bildung von restmonomeren in diesen formmassen Download PDFInfo
- Publication number
- WO1997002314A1 WO1997002314A1 PCT/EP1996/002896 EP9602896W WO9702314A1 WO 1997002314 A1 WO1997002314 A1 WO 1997002314A1 EP 9602896 W EP9602896 W EP 9602896W WO 9702314 A1 WO9702314 A1 WO 9702314A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acrylonitrile
- tocopherol
- weight
- copolymer
- molding compounds
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1545—Six-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/18—Homopolymers or copolymers of nitriles
- C08L33/22—Homopolymers or copolymers of nitriles containing four or more carbon atoms
Definitions
- Thermoplastic molding compositions and a process for reducing the formation of residual monomers in these molding compositions
- the invention relates to thermoplastic molding compositions and, in particular, to a method for reducing the formation of residual monomers under thermal stress and shear of the molding compositions.
- WO 90/07547 discloses stabilizer mixtures of ⁇ -tocopherol (vitamin E) and glycerol mono-, di- and / or triestera of saturated or unsaturated fatty acids for stabilizing thermoplastics, such as polyvinyl chloride, styrene polymers, polyamides, polycarbonate, polyesters and polyolefins .
- J5 6028-228 and J5 0110-442 describe the stabilization of u. a. Polyethylene, polypropylene and PVC with ⁇ -tocopherol.
- J5 4055-043 and J6 3137-941-A name vitamin E and a compound of the phosphite or phosphonite type as stabilizers for polyolefins.
- J5 8002-337 discloses a method for preventing the formation of carcinogenic nitrosamines in natural or synthetic rubber by u. a. Vitamin E is incorporated.
- EP-A-0 384 472 discloses a composition of a thermoplastic, a light protection material and vitamin E as packaging material for light-sensitive materials. a. ABS is mentioned.
- acrylonitrile tend to form acrylonitrile monomers, particularly when subjected to thermal stress or shear. This represents a This is a problem because acrylonitrile is classified as carcinogenic according to group IBLA2 (cf. acrylonitrile, leaflet M 016, 11/90, publisher: the professional association of the chemical industry).
- the object of the present invention was to develop molding compositions from acrylonitrile-containing polymers in which the formation of residual monomers is reduced under thermal stress and shear.
- thermoplastic molding composition made from acrylonitrile-containing polymers and ⁇ -tocopherol.
- the formation of residual monomers can be reduced if the thermal stress on acrylonitrile-containing polymers takes place in the presence of ⁇ -tocopherol.
- the present invention thus relates to thermoplastic molding compositions containing
- the invention further relates to a method for reducing the formation of residual monomers under thermal stress and shear of the molding material.
- Sen which is characterized in that 0.005-2% by weight, based on A + B, of ⁇ -tocopherol is added before, during or after the polymerization, but before the thermal stress or shear.
- the invention relates to the use of the molding compositions according to the invention for the production of moldings and to these moldings.
- Component A is an acrylonitrile-containing polymer, preferably polyacrylonitrile, an acrylonitrile-styrene copolymer or a copolymer of acrylonitrile-styrene derivatives or of acrylonitrile and methyl methacrylate.
- suitable styrene derivatives are nucleus-substituted styrenes and the styrenes substituted on the double bond, such as, for. B. ⁇ -methyl styrene. Most preferred is an ⁇ -methylstyrene-acrylonitrile copolymer.
- the acrylonitrile-containing polymers contain other polymers, such as. B. rubbers, such as polybutadiene or poly-butyl acrylates, which can also be grafted with other monomers, for. B. with polystyrene acrylonitrile.
- the acrylonitrile-containing polymers can also be mixed with polycarbonate.
- the molding compositions according to the invention contain 98-99.995, preferably 98.5-99.9, particularly preferably 99.5-99.93, in each case% by weight, based on A + B, of the acrylonitrile-containing polymer.
- ⁇ -Tocopherol is used as component B.
- the amount of component B is 0.005-2, preferably 0.01-1.5, particularly preferably 0.02-0.5, in each case in% by weight, based on A + B.
- the Component B added before or during the production of the acrylonitrile-containing polymer.
- component B is added after the polymerization to the acrylonitrile-containing polymers or the molding compositions according to the invention before the thermal stress and shear, so that the thermal stress and shear takes place in the presence of component B.
- the addition of component B to the polymer can be achieved by mixing in the polymer melt, e.g. B. in an extruder.
- the molding compositions according to the invention can contain, as component C, additives of the kind customary and customary for acrylonitrile-containing polymers.
- additives are stabilizers such. B. sterically hindered phenols, phosphorus compounds and light stabilizers.
- additives such as glass fibers, paint, lubricants, carbon black and fillers can also be included.
- the additives are used in conventional amounts, preferably in amounts of 0.1 to a total of 30% by weight, based on A + B.
- the present invention has the advantage that the use of ⁇ -tocopherol also leads to a substantially lighter product color.
- the molding compositions according to the invention are suitable for the production of molded parts, in particular in the electrical engineering sector, for household goods, in the sanitary sector and for the production of toys.
- Application in the automotive industry is also advantageously possible.
- the invention is illustrated with the aid of the following examples, which represent preferred embodiments of the invention.
- the residual monomer contents of the polymers in 1,4-dioxane as solvent were determined using a Hewlett Packard 5890 gas chromatograph with a DB wax capillary column (Ultra 20 column).
- the retention times and the GC factors of the flame ionization detector were calibrated with calibration solutions in 1,4-dioxane.
- the lower limit of determination was 0.5 to 2.0 ppm.
- the polymer was degassed in an extruder, extruded as a strand and then granulated.
- the maximum temperature during this process was 250 ° C.
- Example 3 was repeated, but the temperature in the extruder was 300 ° C. instead of 260 ° C.
- Example 7 (Invention)
- Example 6 was repeated, but before the extrusion the copolymer was mixed with 0.05% by weight of ⁇ -tocopherol, based on the copolymer + ⁇ -tocopherol.
- ABS polymer made from 29 parts by weight of polybutadiene graft rubber, produced according to the teaching of EP-A-062 901, and from 71 parts by weight of a polystyrene-acrylonitrile copolymer with 35% by weight of acrylonitrile and a viscosity number of 80 ml / g (measured 0.5% in DMF at 23 ° C.) was extruded in a ZSK 30 extruder from Werner and Pfleiderer at 100 rpm and 260 ° C. The throughput was 10 kg / h.
- Example 8 was repeated, but before the extrusion, the copolymer was mixed with 0.05% by weight of ⁇ -tocopherol, based on the copolymer 4- ⁇ -tocopherol.
- the table shows that in the experiments according to the invention, in which ⁇ -tocopherol was added to the acrylonitrile-containing polymer before the polymerization or to the polymer, a lower content of residual monomers was measured under thermal stress than in the comparative experiments in which either none or a commercially available stabilizer (Irganox 1010) has been added.
- the addition of ⁇ -tocopherol thus suppresses the formation of residual monomers when the polymer is thermally stressed.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59603231T DE59603231D1 (de) | 1995-07-03 | 1996-07-02 | Thermoplastische formmassen sowie ein verfahren zur reduzierung der bildung von restmonomeren in diesen formmassen |
EP96924851A EP0836632B1 (de) | 1995-07-03 | 1996-07-02 | Thermoplastische formmassen sowie ein verfahren zur reduzierung der bildung von restmonomeren in diesen formmassen |
JP9504813A JPH11508929A (ja) | 1995-07-03 | 1996-07-02 | 熱可塑性成形材料及び該成形材料中の残留モノマーの形成を減少させる方法 |
US08/981,688 US6022915A (en) | 1995-07-03 | 1996-07-02 | Thermoplastic molding compounds and a method of reducing the formation of residual monomers in these molding compounds |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19524178A DE19524178A1 (de) | 1995-07-03 | 1995-07-03 | Thermoplastische Formmassen sowie ein Verfahren zur Reduzierung der Bildung von Restmonomeren in diesen Formmassen |
DE19524178.9 | 1995-07-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997002314A1 true WO1997002314A1 (de) | 1997-01-23 |
Family
ID=7765878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/002896 WO1997002314A1 (de) | 1995-07-03 | 1996-07-02 | Thermoplastische formmassen sowie ein verfahren zur reduzierung der bildung von restmonomeren in diesen formmassen |
Country Status (8)
Country | Link |
---|---|
US (1) | US6022915A (de) |
EP (1) | EP0836632B1 (de) |
JP (1) | JPH11508929A (de) |
KR (1) | KR19990028707A (de) |
CN (1) | CN1075089C (de) |
DE (2) | DE19524178A1 (de) |
ES (1) | ES2138360T3 (de) |
WO (1) | WO1997002314A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002194141A (ja) * | 2000-12-22 | 2002-07-10 | Sumitomo Chem Co Ltd | ブタジエン重合体成形品の製造法 |
JP3850305B2 (ja) * | 2002-02-08 | 2006-11-29 | Psジャパン株式会社 | 芳香族モノビニル系樹脂シート及びそのシート用樹脂の製造方法 |
US6673892B2 (en) * | 2002-04-29 | 2004-01-06 | Eastman Chemical Company | Process for reducing residual free radical polymerizable monomer content of polymers |
US11267951B2 (en) | 2010-12-13 | 2022-03-08 | Cytec Technology Corp. | Stabilizer compositions containing substituted chroman compounds and methods of use |
UA123990C2 (uk) | 2010-12-13 | 2021-07-07 | Сайтек Текнолоджи Корп. | Технологічні добавки і їх застосування в ротаційному формуванні |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0263524A2 (de) * | 1986-10-10 | 1988-04-13 | BASF Aktiengesellschaft | Stabilisatorgemische für Kunststoffe |
WO1990007547A1 (de) * | 1988-12-23 | 1990-07-12 | Basf Aktiengesellschaft | Stabilisatorgemische für kunststoffe |
EP0384472A1 (de) * | 1989-02-23 | 1990-08-29 | Fuji Photo Film Co., Ltd. | Harzzusammensetzung und Verpackungsmaterial für lichtempfindliches Material |
DE4405670A1 (de) * | 1994-02-23 | 1995-08-24 | Basf Ag | Stabilisatorgemisch aus Chromanderivaten, organischen Phosphiten oder Phosphoniten und Aminen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5629363A (en) * | 1994-02-10 | 1997-05-13 | Abber; Herman | Aqueous-based, shear-thinning, erasable ink and roller-ball pen containing same |
US5670255A (en) * | 1995-01-23 | 1997-09-23 | Ppg Industries, Inc. | Antioxidant compositions for coating substrates, substrates coated with the same and methods for inhibiting the oxidation of such compositions applied to a substrate |
DE19516283A1 (de) * | 1995-05-04 | 1996-11-07 | Basf Ag | Thermoplastische Formmasse |
-
1995
- 1995-07-03 DE DE19524178A patent/DE19524178A1/de not_active Withdrawn
-
1996
- 1996-07-02 EP EP96924851A patent/EP0836632B1/de not_active Expired - Lifetime
- 1996-07-02 CN CN96196372A patent/CN1075089C/zh not_active Expired - Fee Related
- 1996-07-02 US US08/981,688 patent/US6022915A/en not_active Expired - Fee Related
- 1996-07-02 WO PCT/EP1996/002896 patent/WO1997002314A1/de not_active Application Discontinuation
- 1996-07-02 ES ES96924851T patent/ES2138360T3/es not_active Expired - Lifetime
- 1996-07-02 KR KR1019980700005A patent/KR19990028707A/ko not_active Application Discontinuation
- 1996-07-02 JP JP9504813A patent/JPH11508929A/ja active Pending
- 1996-07-02 DE DE59603231T patent/DE59603231D1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0263524A2 (de) * | 1986-10-10 | 1988-04-13 | BASF Aktiengesellschaft | Stabilisatorgemische für Kunststoffe |
WO1990007547A1 (de) * | 1988-12-23 | 1990-07-12 | Basf Aktiengesellschaft | Stabilisatorgemische für kunststoffe |
EP0384472A1 (de) * | 1989-02-23 | 1990-08-29 | Fuji Photo Film Co., Ltd. | Harzzusammensetzung und Verpackungsmaterial für lichtempfindliches Material |
DE4405670A1 (de) * | 1994-02-23 | 1995-08-24 | Basf Ag | Stabilisatorgemisch aus Chromanderivaten, organischen Phosphiten oder Phosphoniten und Aminen |
Also Published As
Publication number | Publication date |
---|---|
EP0836632B1 (de) | 1999-09-29 |
JPH11508929A (ja) | 1999-08-03 |
CN1075089C (zh) | 2001-11-21 |
CN1193330A (zh) | 1998-09-16 |
EP0836632A1 (de) | 1998-04-22 |
DE19524178A1 (de) | 1997-01-09 |
DE59603231D1 (de) | 1999-11-04 |
KR19990028707A (ko) | 1999-04-15 |
US6022915A (en) | 2000-02-08 |
ES2138360T3 (es) | 2000-01-01 |
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