Composite articles by combining a thermoplastic molding and foam
AssigneeHuels Aktiengesellschaft
InventorsFriedrich-Georg Schmidt, Herbert Knipp, Wilhelm Munninghoff
Life of this patent
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Abstract
A composite article is prepared by intimately bonding a latex foam with a thermoplastic molded part containing polyphenylene ether, the latex consisting of the following components, relative to its total rubber content: I. 20-100% by weight of SBR latex with a minimum proportion of more than 15% by weight of styrene in the solid polymer, and II. 80-0% by weight of natural-rubber latex or other, synthetic latexes. The combination is vulcanized to form a product which exhibits cohesive rupture within the foam body, when the foam body is subjected to separation.
Claims9
A composite article, comprising:
- a thermoplastic molded object whose surface is bonded to a foamed latex material as the wet foamed latex material in contact with said thermoplastic molded object is vulcanized, said thermoplastic molded object constituted of the following components:
- a) 10-100 parts by weight (ppw) of polyphenylene ether (PPE) which is essentially made up of units having the structural formula:
- ##STR2## wherein R.sub.1 and R.sub.2 each is an n-alkyl group of up to 6 carbon atoms or R.sub.1 represents hydrogen and R.sub.2 a tertiary alkyl of up to 6 C atoms;
- R.sub.3 and R.sub.4 represent, independently of each other, a methyl group or hydrogen;
- b) 0-80 ppw of styrene polymer;
- c) 0-30 ppw of impact modifiers;
- d) 0-40 ppw of reinforcing agents and/or fillers;
- e) 0-30 ppw of flame retardants;
- and
- f) 0-15 ppw of customary additives, the formulation having a heat deflection temperature, according to ISO 75, Method B, of greater than 90.degree. C.;
- and the foamed latex consisting of, relative to the total rubber content of the foamed latex,
- I) 20-100% by weight of SBR latex with a minimum proportion of more than 15% by weight of styrene in the solid polymer, and
- II) 80-0% by weight of natural-rubber latex or at least one other synthetic latex, with the remaining constituents being vulcanizing agents, processing agents and gelling agents.
Dependencies are inferred from the claim text.