申请人:BASF CORPORATION
公开号:EP0771829A1
公开(公告)日:1997-05-07
The present invention relates to water-blown integral skin polyurethane foam compositions, molded polyurethane articles, a process of preparing said articles, and an isocyanate composition for use therein. In particular, the invention relates to water-blown integral skin molded polyurethane articles having particularly advantageous physical properties, and compositions useful for producing such articles.
In particular, the invention provides a polyurethane composition which has an isocyanate component (a) an isocyanate reactive component (b), a blowing agent comprising water (c), a polyether (d) selected from the group consisting of polytetrahydrofuran and polyethylene glycol having a number average molecular weight of from 200 to 2000 and optionally, one or more additives (e) from the group consisting of catalysts, chain extenders, oxo alcohols, and mixtures thereof. The composition may be characterized in that the integral skin polyurethane articles made of the composition have a tensile strength of greater than or equal to 450 psi and/or a Taber abrasion (mg loss) of less than 200.
本发明涉及水发泡自结皮聚氨酯泡沫组合物、模塑聚氨酯制品、制备上述制品的工艺以及用于其中的异氰酸酯组合物。特别是,本发明涉及具有特别有利的物理性质的水发泡自结皮模塑聚氨酯制品,以及用于生产此类制品的组合物。
特别是,本发明提供了一种聚氨酯组合物,该组合物具有异氰酸酯组分(a)、异氰酸酯反应组分(b)、由水(c)组成的发泡剂、从聚四氢呋喃和聚乙二醇组成的组中选出的聚醚(d)(其平均分子量为 200 至 2000)以及从催化剂、扩链剂、羰基醇及其混合物组成的组中任选的一种或多种添加剂(e)。该组合物的特点是,用该组合物制成的整皮聚氨酯制品的拉伸强度大于或等于 450 psi 和/或 Taber 磨损率(毫克损失)小于 200。