US 5,397,225 AGranted

Mold for the production of latex foam articles

AssigneeHuels Aktiengesellschaft

InventorsHerbert Knipp, Friedrich G. Schmidt, Karl Tessmann

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Abstract

Latex foam molded articles are prepared using a plastic mold heated by means of microwave energy. The molded article can be readily released from the mold. The mold has good dimensional accuracy and a long serviceable lifetime. The walls of the mold are composed of a molding composition which has the following constituents: a) 20 to 100 parts by weight of polyphenylene ether, b) 0 to 30 parts by weight of styrene polymers, c) 0 to 30 parts by weight of impact-modifying additives, d) 0 to 40 parts by weight of reinforcing agents and/or fillers and e) 0 to 15 parts by weight of additives. The mold surface is passivated. Compared with conventional processes for the production of latex foam molded articles, the cycle time and the energy consumption are considerably reduced when this mold is used.

Claims18

Dependent claims

A mold for the production of vulcanized latex foam moldings by means of microwave heating, said mold having walls with an inside surface, said walls made of a molding composition comprising:

a) 20 to 100 parts by weight of polyphenylene ether, having monomer units of the formula ##STR2## wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of C.sub.1-6 n-alkyl groups, and the group where R.sub.1 is hydrogen and R.sub.2 is a C.sub.1-6 tertiary alkyl group;
and R.sub.3 and R.sub.4, independently, are a methyl group or hydrogen,
b) 0-80 parts by weight of styrene polymers,
c) 0-30 parts by weight of impact-modifying compounds,
d) 0-40 parts by weight of reinforcing agents, fillers or mixtures thereof, and
e) 0-15 parts by weight of additives,
wherein said inside surface of the mold walls is passivated, reducing adhesion between said passivated mold wall surface and the vulcanized latex foam molding, providing problem-free release of the molding from the mold.

4 more elements

Dependencies are inferred from the claim text.