DE1158245B - Process for welding vulcanized or partially vulcanized mixtures based on butadiene-acrylonitrile copolymers in a high-frequency alternating electric field - Google Patents

Process for welding vulcanized or partially vulcanized mixtures based on butadiene-acrylonitrile copolymers in a high-frequency alternating electric field

Info

Publication number
DE1158245B
DE1158245B DEC12783A DEC0012783A DE1158245B DE 1158245 B DE1158245 B DE 1158245B DE C12783 A DEC12783 A DE C12783A DE C0012783 A DEC0012783 A DE C0012783A DE 1158245 B DE1158245 B DE 1158245B
Authority
DE
Germany
Prior art keywords
vulcanized
butadiene
welding
electric field
acrylonitrile copolymers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DEC12783A
Other languages
German (de)
Inventor
Dipl-Chem Dr Fritz Glander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental AG
Original Assignee
Continental Gummi Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Gummi Werke AG filed Critical Continental Gummi Werke AG
Priority to DEC12783A priority Critical patent/DE1158245B/en
Publication of DE1158245B publication Critical patent/DE1158245B/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/02—Copolymers with acrylonitrile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73753—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized
    • B29C66/73754—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being partially cured, i.e. partially cross-linked, partially vulcanized the to-be-joined areas of both parts to be joined being partially cured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7375—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured
    • B29C66/73755—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being fully cured, i.e. fully cross-linked, fully vulcanized
    • B29C66/73756—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined uncured, partially cured or fully cured the to-be-joined area of at least one of the parts to be joined being fully cured, i.e. fully cross-linked, fully vulcanized the to-be-joined areas of both parts to be joined being fully cured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2019/00—Use of rubber not provided for in a single one of main groups B29K2007/00 - B29K2011/00, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/18—Polymers of nitriles
    • B29K2033/20—PAN, i.e. polyacrylonitrile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2061/00—Use of condensation polymers of aldehydes or ketones or derivatives thereof, as moulding material
    • B29K2061/20—Aminoplasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers

Description

Verfahren zum Verschweißen von vulkanisierten bzw. teilvulkanisierten Mischungen auf der Grundlage von Butadien-Acryls äurenitril-Mlschpolymens aten im hochfrequenten elektrischen Wechselfeld Um eine gute Haftfestigkeit zu erreichen, ist der Zusatz von Anilinharzen zur Kautschukmischungen vorgeschlagen worden. In denselben Veröffentlichungen werden auch Kautschukmilchmischungen beschrieben, die Melamin-Formaldehyd-Harze enthalten, doch ist dabei nicht der Gedanke einer guten Haftfestigkeit dieser Mischungen und erst recht nicht das Verschweißen der vulkanisierten Mischungen im elektrischen Hochfrequenzfeld nahegelegt. Process for welding vulcanized or partially vulcanized Mixtures based on butadiene-acrylic acid nitrile-Mlschpolymens aten im high-frequency alternating electric field In order to achieve good adhesive strength, the addition of aniline resins to rubber compounds has been proposed. In The same publications also describe rubber milk mixtures that Melamine-formaldehyde resins contain, but doing so is not a good idea Adhesion strength of these mixtures and certainly not the welding of the vulcanized ones Mixtures in the high-frequency electric field suggested.

Nach einem anderen Vorschlag werden Melamin-Formaldehyd-Harze als Beimischungen zu Butadien-Acrylsäurenitril-Mischpolymeris aten im Zusammenhang mit einer Reihe anderer Zusätze angeführt. Aus derselben Schriftstelle geht hervor, daß Phenolharze in Kautschukmischungen eine bessere Haftfestigkeit bewirken sollen. Es hat sich jedoch erwiesen, daß diese phenolharzhaltigen Mischungen sich gegenseitig im vulkanisierten Zustand sehr schlecht verschweißen lassen. Besonders schlechte Erfahrungen hat man dabei mit Mischungen auf der Grundlage von Butadien-Acrylsäurenitril-Mischpolymerisaten gemacht. According to another proposal, melamine-formaldehyde resins are called Additions to butadiene-acrylonitrile copolymers in connection with listed a number of other additions. From the same scripture it appears that phenolic resins in rubber mixtures are supposed to bring about better adhesion. However, it has been found that these phenolic resin-containing mixtures are mutually exclusive Can be welded very poorly in the vulcanized state. Particularly bad Experience has been gained with mixtures based on butadiene-acrylonitrile copolymers made.

Überraschenderweise hat sich nun gezeigt, daß vulkanisierte bzw. tellvulkanisierte Mischungen auf der Grundlage von Butadien-Acrylsäurenitril-Mischpolymerisaten, die Aminotriazin-Formaldehyd-Harze enthalten, sich ohne jegliche Schwierigkeit durch Hochfrequenzbeheizung gegenseitig verschweißen lassen, wenn zwischen die zu verbindenden vulkanisierten bzw. teilvulkanisierten Teile eine Schicht einer teil- bzw. unvulkanisierten Mischung auf derselben Grundlage angeordnet wird. Die Verwendung einer anvulkanisierten Mischung ist dabei vorzuziehen, weil sie noch eine bessere Verschweißung gibt als eine unvulkanisierte Zwischenschicht. Surprisingly, it has now been shown that vulcanized or plate-vulcanized mixtures based on butadiene-acrylonitrile copolymers, the aminotriazine-formaldehyde resins contain themselves without any difficulty Let high-frequency heating weld each other, if between the to be connected vulcanized or partially vulcanized parts a layer of a partially or unvulcanized Mixture is arranged on the same basis. The use of a vulcanized Mixture is preferable because it gives a better weld than an unvulcanized intermediate layer.

Im Gegensatz zu vulkanisierten Mischungen auf der Grundlage von unverschnittenen Butadien-Acrylsäurenitril-Mischpolymerisaten, zwischen die zur der besserung der Verschweißung eine anvulkanisierte Schicht aus derselben Mischung angeordnet wird, ergeben sich gemäß der Erfindung eindeutig bessere Resultate. Wenn nämlich ohne Zusatz von Aminotriazin-Formaldehyd-Harzen gearbeitet wird, tritt zwar in der Verbindungsstelle ein Verkleben ein, jedoch wird bei einem Zerreißversuch die Verbindungsstelle wieder in die einzelnen Schichten gespalten. Bei Verwendung der Mischungen gemäß der Erfindung tritt eine derartig innige Verbindung der drei Schichten miteinander ein, daß überhaupt keine Trennlinie mehr wahrnehmbar ist. Außerdem hat es sich gezeigt, daß die Nahtstelle eine Zerreißfestigkeit von 130 bis 140 kg/cm2 aufweist, also eine Festigkeit, die derjenigen der vulkanisierten Platte aus dem Butadien-Acrylsäurenitril-Mischpolymerisat und dem Zusatz von Aminotriazin-Formaidehyd-Harzen gleichkommt. In contrast to vulcanized mixtures based on uncut Butadiene-acrylonitrile copolymers, between which to improve the Welding a vulcanized layer of the same mixture is arranged, clearly better results are obtained according to the invention. If namely without Addition of aminotriazine-formaldehyde resins is worked, occurs in the junction a gluing, but the connection point will be restored in the event of an attempt to tear split into the individual layers. When using the mixtures according to the invention the three layers are so intimately connected that at all no dividing line is perceptible. It has also been shown that the seam has a tensile strength of 130 to 140 kg / cm2, i.e. a strength that that of the vulcanized plate from the butadiene-acrylonitrile copolymer and the addition of aminotriazine-formaldehyde resins is equivalent.

Die Erfindung findet vor allem Anwendung zur Herstellung von Gegenständen aus Butadien-Acrylsäurenitril-Mischpolymerisaten, beispielsweise Behältern oder Dichtungen, insbesondere für Artikel, welche mit Kohlenwasserstoffen oder ähnlichen Lösungsmitteln in Berührung kommen, die gegenüber Kautschukmischungen stark aggressiv wirken. The invention is primarily used for the manufacture of objects from butadiene-acrylonitrile copolymers, for example containers or Seals, especially for articles containing hydrocarbons or the like Come into contact with solvents that are highly aggressive towards rubber compounds works.

Es hat sich beispielsweise gezeigt, daß sich Treibstoffbehälter von großen Dimensionen nicht ohne Schwierigkeiten auf die gewöhnliche Art in der Wärme vulkanisieren lassen. Aus diesem Grunde ist die Verschweißung dieser Behälter am Einsatzort im hochfrequenten elektrischen We chselfeld vorzuziehen. It has been shown, for example, that fuel tanks of large dimensions not without difficulty in the usual way in warmth let vulcanize. For this reason, the welding of these containers is on Preferred location for use in high-frequency alternating electrical fields.

Selbstverständlich lassen sich die aus den erfindungsgemäß hergestellten Mischungen ausgebildeten Behälter oder andere Gegenstände auch an Ort und Stelle unter Anwendung eines hochfrequenten elektrischen Wechselfeldes reparieren bzw. endlos verbinden. Dadurch wird man vom Fabrikationsort der Kautschukmischungen unabhängig und außerdem ergibt sich ein leichterer Transport der Halbfertigprodukte, die erst an Ort und Stelle zu Artikeln von größeren Dimensionen gestaltet werden. Of course, those produced from the according to the invention can be used Mixtures formed containers or other items also in place repair or repair using a high-frequency alternating electric field connect endlessly. This makes you independent of the production site of the rubber compounds and there is also an easier transport of the semi-finished products, which only be designed on the spot into articles of larger dimensions.

Claims (1)

PATENTANspRucH: Verfahren zum Verschweißen von Mischungen auf der Grundlage von Butadien-Acrylsäurenitril-Copolymerisaten, die Aminotriazin-Formaldehyd -Harze enthalten, im hochfrequenten elektrischen Wechselfeld, dadurch gekennzeichnet, daß vulkanisierte oder teilvulkanisierte Mischungen unter Zwischenlage einer Schicht einer teil- oder unvulkanisierten Mischung gleicher Art verwendet werden. PATENT CLAIM: Process for welding mixtures on the Based on butadiene-acrylonitrile copolymers, the aminotriazine-formaldehyde -Containing resins, in the high-frequency alternating electric field, characterized by that vulcanized or partially vulcanized mixtures with the interposition of a layer a partially or unvulcanized mixture of the same type can be used. In Betracht gezogene Druckschriften: Französische Patentschrift Nr. 1 090331; USA.-Patentschrift Nr. 2 459 739; Kautschuk und Gummi (1955), 8, 96 WT-WT 101. Documents considered: French patent specification No. 1,090331; U.S. Patent No. 2,459,739; Kautschuk und Gummi (1955), 8, 96 WT-WT 101.
DEC12783A 1956-03-26 1956-03-26 Process for welding vulcanized or partially vulcanized mixtures based on butadiene-acrylonitrile copolymers in a high-frequency alternating electric field Pending DE1158245B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEC12783A DE1158245B (en) 1956-03-26 1956-03-26 Process for welding vulcanized or partially vulcanized mixtures based on butadiene-acrylonitrile copolymers in a high-frequency alternating electric field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC12783A DE1158245B (en) 1956-03-26 1956-03-26 Process for welding vulcanized or partially vulcanized mixtures based on butadiene-acrylonitrile copolymers in a high-frequency alternating electric field

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DE1158245B true DE1158245B (en) 1963-11-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459739A (en) * 1944-04-01 1949-01-18 Firestone Tire & Rubber Co Elastomeric copolymer mixed with phenol-aldehyde resin
FR1090331A (en) * 1953-01-10 1955-03-29 Rubber Stichting Process for the preparation of products composed of rubber and resin from latex, and vulcanized articles produced using these products

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459739A (en) * 1944-04-01 1949-01-18 Firestone Tire & Rubber Co Elastomeric copolymer mixed with phenol-aldehyde resin
FR1090331A (en) * 1953-01-10 1955-03-29 Rubber Stichting Process for the preparation of products composed of rubber and resin from latex, and vulcanized articles produced using these products

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