| 摘要 |
PURPOSE:To improve mold releasability of a rubber or plastic molded product as contamination of a mold is prevented as much as possible and the number of washing times of the mold can be reduced, by performing molding by making use of the mold surface-treated with a surface treatment agent containing a denatured silicone compound and an organic isocyanate compound having specific molecular structure. CONSTITUTION:A mold a part of the inner surface of which is surface-treated with a surface treatment agent composed of a denatured silicone compound and organic isocyanate compound shown by an expression (1) by containing them is used as the mold, in a method of manufacturing a rubber or plastic molded product by supply in a rubber or plastic molding material into the mold. In the expression, it shown that both l and m are integral numbers; X is a monovalent organic radical possessing active hydrogen and R<1>, R<2>, R<3> are the same or different kind replacement or nonreplacement of a monovalent hydrocarbon respectively. When the mold is surface- treated by making use of the surface treatment agent, a surface treatment film is formed firmly on the surface of the mold. The surface of the mold is inactive from a chemical point of view and a washing term of the mold can be extended remarkably by preventing the contamination effectively. |
