| 摘要 |
PURPOSE:To obtain a molded article not being transformed in hot water, not changing bond strength depending upon temperature, having flexibility at a temperature <= ice point, by blending polymer latex, e.g., natural rubber latex, etc. with an oily substance, adding a polyether compound to the blend, followed by molding it. CONSTITUTION:Natural rubber latex or latex of carboxyl group-containing polymer, preferably a copolymer of styrene, (meth)acrylic acid, butadiene, and an unsaturated carboxylic acid, is blended with soybean oil, liquid paraffin, etc. as an oily substance to give a uniform creamy blend, which is blended with a polyether compound, preferably polyoxypropylene having a molecular weight 1,000-6,000, etc. The latex is used in creamy state during processing. A surface active agent, etc. may be added while the oily substance being blended, the pH of the latex is preferably 3-7 when the polyether compound is blended, and the addition of a polyvalent metal compound controls easily and the properties of bulked materials. |
