Manufacture of flexible foams
    21.
    发明授权
    Manufacture of flexible foams 失效
    制造柔性泡沫

    公开(公告)号:US4251639A

    公开(公告)日:1981-02-17

    申请号:US28313

    申请日:1979-04-09

    CPC分类号: C08G18/8035 C08G18/8041

    摘要: This invention concerns a process for the manufacture of flexible polyurethane foams from urethane-modified aromatic polyisocyanates having an NCO content of 15 to 30 percent by weight and a viscosity of 100 to 2000 centipoises at 20.degree. C., which are obtained by reaction of a mixture of diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates containing 55 to 85 percent by weight of diphenylmethane diisocyanate based on the total weight of the polyisocyanate mixture and a hydroxyl compound with 2 to 4 Zerewitinoff active hydrogen atoms and a molecular weight of 60 to 1500, in an equivalency ratio of NCO groups to active hydrogen atoms of the hydroxyl compound of 2:1 to 60:1, polyols, catalysts, blowing agents, and optionally, chain extenders, auxiliaries, and additives.

    摘要翻译: 本发明涉及一种由氨基甲酸酯改性的芳族聚异氰酸酯制备柔性聚氨酯泡沫体的方法,该聚氨酯改性芳族聚异氰酸酯在20℃下的NCO含量为15-30%(重量),粘度为100-2000厘泊,这是通过 基于多异氰酸酯混合物的总重量含有55-85重量%的二苯基甲烷二异氰酸酯和具有2-4个Zerewitinoff活性氢原子并且分子量为60至1500的羟基化合物的二苯基甲烷二异氰酸酯和聚亚苯基多亚甲基多异氰酸酯的混合物, NCO基团与羟基化合物的活性氢原子的当量比为2:1至60:1,多元醇,催化剂,发泡剂和任选的增链剂,助剂和添加剂。

    Curable epoxy resins
    30.
    发明授权
    Curable epoxy resins 失效
    可固化环氧树脂

    公开(公告)号:US4559398A

    公开(公告)日:1985-12-17

    申请号:US636236

    申请日:1984-07-31

    摘要: A curable composition consisting ofA. 100 parts by weight of an epoxy resin,B. from 4 to 100 parts by weight of a conventional curing agent for epoxy resins, andC. from 0.1 to 5 parts by weight of an N-acylimidazole which possesses an aromatic acyl component which is substituted at the two positions ortho to the carbonyl groupcan be used to produce moldings, coatings, finishes, adhesives and composite fiber materials.

    摘要翻译: 由A.100重量份的环氧树脂组成的固化性组合物,B为4〜100重量份的环氧树脂的常规固化剂,以及0.1〜5重量份的N-酰基咪唑,其中, 具有在羰基的邻位的两个位置被取代的芳族酰基组分可用于生产模制品,涂料,表面处理剂,粘合剂和复合纤维材料。