Mold release agent and process for the production of plastic molded parts
View Patent ↗Mold release agents useful for the production of plastic molded parts having reduced concentration of undesirable, potentially health hazardous substances in the edge zone and on the surface of the molded part and a process for the production of low toxicity plastic molded parts using such mold release agents. These mold release agents have at least one group which is reactive with the undesirable materials that form on the surfaces and in the edge zones of the molded parts.
1. A process for the production of a plastic molded part having at least an edge zone, said process comprising
a) pretreating the mold with a mold release agent containing at least one additive which is reactive with an aromatic amine, said additive being selected from the group consisting of organic cyclic compounds having a molecular weight of from 200 to 3000 g/mole, derivatives of inorganic acids, derivatives of organic acids, derivatives of carbonic acid, urea, and derivatives of urea,
b) introducing the plastic composition from which the molded part is to be formed into the pretreated mold,
c) forming the molded part, and
d) removing the formed molded part from the mold, wherein said additive reacts with the aromatic amine to effectively reduce the concentration of said amine at the edge zone.