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US H444 HGranted
Process for making molded articles with mold release agents
AssigneeA. E. Staley Manufacturing Company
InventorsClaris D. Roth, Kenneth B. Moser
Life of this patent
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Abstract
A glycoside compound containing one or more fatty acid ester or ether groups is used as a mold release agent in the production of molded articles from polymeric resinous materials. Said mold release agent can function as either external or internal mold release agent. The molded article also has improved tie coating properties.
Claims30
A process for the production of molded articles from a polymeric resinous material comprising the steps of:
- (a) injecting into a mold cavity a mixture which comprises a flowable polymeric resinous material and a mold release agent comprising a glycoside compound containing one or more fatty acid ester or ether groups;
- (b) solidifying said mixture in said mold cavity to form said molded article;
- (c) removing said molded article from said mold cavity;
- and
- (d) applying a surface coating material to said molded article;
- said process being further characterized by the glycoside compound being present in the resinous material in an amount sufficient to provide enhanced adhesion of the surface coating material to the molded article.
3 more elements
A process for producing a polyurethane product, which comprises the steps of:
- (a) injecting into a mold cavity a reactive mixture which comprises a polyol and which further comprises, per hundred parts of said polyol:
- (i) 50 to 500 parts of a polyisocyanate;
- (ii) 0 to 20 parts of a volatile blowing agent;
- (iii) a catalyst component, and;
- (iv) a mold release agent comprising a glycoside compound containing at least one fatty acid ester or ether group, said mold release agent being employed in an amount ranging from 0.1 to 10 percent of the weight of said polyol;
- (b) subjecting said reaction mixture in said mold cavity to temperature and pressure conditions sufficient to convert said reaction mixture to said polyurethane product;
- (c) removing the resulting molded polyurethane product from the mold cavity;
- and
- (d) applying a surface coating material to said molded polyurethane product;
- said process being further characterized by the glycoside compound being present in the reactive mixture in an amount sufficient to provide enhanced adhesion of the surface coating material to the molded polyurethane product.
7 more elements
Dependencies are inferred from the claim text.