Chemical process
    2.
    发明授权
    Chemical process 失效
    化学工艺

    公开(公告)号:US5278274A

    公开(公告)日:1994-01-11

    申请号:US774768

    申请日:1991-10-10

    摘要: A continuous process for the preparation of an isocyanate-terminated prepolymer having an NCO content in the range from 2 to 15% by weight, said process comprising the steps of:(A) continuously delivering to a reaction zone an organic polyisocyanate composition and an isocyanate reactive compound having an average molecular weight of at least 1000 the relative proportions of isocyanate composition and isocyanate reactive compound being appropriate for the formation of a prepolymer having an NCO content in the indicated range;(B) allowing the isocyanate composition and the isocyanate reactive compound to react in the reaction zone to form an isocyanate-terminated prepolymer, and(C) continuously removing the prepolymer from the reaction zone.

    摘要翻译: 一种用于制备NCO含量在2至15重量%范围内的异氰酸酯封端的预聚物的连续方法,所述方法包括以下步骤:(A)连续地向反应区输送有机多异氰酸酯组合物和异氰酸酯 平均分子量为1000以上的反应性化合物,其特征在于,所述异氰酸酯组合物和异氰酸酯反应性化合物的相对比例适合于形成指定范围内NCO含量的预聚物; (B)使异氰酸酯组合物和异氰酸酯反应性化合物在反应区中反应形成异氰酸酯封端的预聚物,(C)从反应区连续除去预聚物。

    Method for preparing moulded polyureapolyurethane flexible foams
    5.
    再颁专利
    Method for preparing moulded polyureapolyurethane flexible foams 失效
    聚氨酯聚氨酯柔性泡沫塑料的制备方法

    公开(公告)号:USRE34669E

    公开(公告)日:1994-07-19

    申请号:US803959

    申请日:1991-12-09

    IPC分类号: C08G18/50 C08G18/65 C08G18/14

    摘要: A method to prepare polyurethane and/or polyurea flexible foams which comprises reacting:A. an organic polyisocyanate compositionB. an isocyanate-reactive composition containing:a. at least one high Mw isocyanate-reactive compoundb.sub.1. a primary or secondary amino-functional compound (so-called chain-extender) of Mw below 1000 in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) orb.sub.2. a mixture of at least two chain extenders of which at least one is a primary or secondary amino-functional compound of Mw below 1000, in an amount of 0.1% to 10% by wt of high Mw isocyanate-reactive compound(s)C. H.sub.2 OD. optionally catalystsE. optionally further blowing agents which are different from H.sub.2 O.F. optionally further conventional additives.

    摘要翻译: 一种制备聚氨酯和/或聚脲柔性泡沫的方法,其包括使有机多异氰酸酯组合物B.反应性异氰酸酯组合物包含:a。 至少一种高Mw异氰酸酯反应性化合物b1。 Mw小于1000的伯或仲氨基官能化合物(所谓的增链剂)的量小于1重量%的高Mw异氰酸酯反应性化合物或b2。 至少两种增链剂的混合物,其至少一种是Mw低于1000的伯或仲氨基官能化合物,其量为0.1重量%至10重量%的高Mw异氰酸酯反应性化合物C。 任选地,任选地,与H 2 O不同的另外的发泡剂。 F.任选的其它常规添加剂。

    Method for preparing moulded polureapolyurethane flexible foams
    6.
    发明授权
    Method for preparing moulded polureapolyurethane flexible foams 失效
    制备聚氨酯聚氨酯柔性泡沫塑料的方法

    公开(公告)号:US5034427A

    公开(公告)日:1991-07-23

    申请号:US440399

    申请日:1989-11-22

    IPC分类号: C08G18/50 C08G18/65

    摘要: A method to prepare polyurethane and/or polyurea flexible foams which comprises reacting:A. an organic polyisocyanate compositionB. an isocyanate-reactive composition containing:a. at least one high Mw isocyanate-reactive compoundb.sub.1. a primary or secondary amino-functional compound (so-called chain-extender) of Mw below 1000 in an amount of less than 1% by wt of high Mw isocyanate-reactive compound(s) orb.sub.2. a mixture of at least two chain extenders of which at least one is a primary or secondary amino-functional compound of Mw below 1000, in an amount of 0.1% to 10% by wt of high Mw isocyanate-reactive compound(s)C. H.sub.2 OD. optionally catalystsE. optionally further blowing agents which are different from H.sub.2 O.F. optionally further conventional additives.

    摘要翻译: 一种制备聚氨酯和/或聚脲柔性泡沫的方法,其包括使有机多异氰酸酯组合物B.反应性异氰酸酯组合物包含:a。 至少一种高Mw异氰酸酯反应性化合物b1。 Mw小于1000的伯或仲氨基官能化合物(所谓的增链剂)的量小于1重量%的高Mw异氰酸酯反应性化合物或b2。 至少两种增链剂的混合物,其至少一种是Mw低于1000的伯或仲氨基官能化合物,其量为0.1重量%至10重量%的高Mw异氰酸酯反应性化合物C。 任选地,任选地,与H 2 O不同的另外的发泡剂。 F.任选的其它常规添加剂。