| 摘要 |
PURPOSE:To efficiently obtain a molded synthetic resin product having uniform physical properties and good appearance, by subjecting a high-molecular weight active hydrogen compound, polyisocyanate compound and chain extender, such as a specific nuclear substituted diaminobenzene, in the presence of a catalyst, foaming agent, etc., to reaction injection molding. CONSTITUTION:A raw material component containing a high-molecular weight active hydrogen compound (e.g. polyoxypropylenoxyethylene triol) and a diaminobenzene (e.g. 5-dodecyl-2,4-toluenediamine) having at least one aliphatic or alicyclic hydrocarbon group In the nucleus in which at least one thereof is a >=8C hydrocarbon as a chain extender or with other chain extenders (e.g. ethylene glycol) and a catalyst and foaming agent optionally blended therein and a raw material component containing a polyisocyanate compound (e.g. diphenylmethane diisocyanate) are used to carry out reaction injection molding and afford the aimed molded synthetic resin product.
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