公开(公告)号：US5338763A

公开(公告)日：1994-08-16

申请号：US986167

申请日：1992-12-04

申请人： Thomas Munzamy ,  Werner Rasshofer ,  Karl-Heinz Dorner ,  Ulrich Limna

发明人： Thomas Munzamy ,  Werner Rasshofer ,  Karl-Heinz Dorner ,  Ulrich Limna

IPC分类号： C08G18/00 ,  C08G18/83 ,  C08J11/24 ,  C08L75/04 ,  C08J11/04

CPC分类号： C08J11/24 ,  C08G18/831 ,  C08L75/04 ,  C08J2375/04 ,  Y02W30/706

摘要： Compounds containing alcoholic hydroxyl groups suitable as a starting material for the isocyanate polyaddition process by the alcoholysis of polyisocyanate polyaddition products are produced. Polyurethane urea or polyurea waste products having a molar ratio of urea groups to urethane groups of from 1:20 to 1:0 are heated in size reduced form to temperatures of from 120.degree. to 250.degree. C. together with B) polyhyhdric alcohols in the molecular weight range of from 62 to 250 in a ratio by weight of A:B of from 3:1 to 1:10. At least 10% of the polyhydric alcohol B put into the process is subsequently removed by distillation under reduced pressure. A total of up to 1000% by weight, based on the weight of polyurethane urea or polyurea waste A, of one or more polyhydroxy compounds having a molecular weight above 250 which is (are) not volatile under the distillation conditions may optionally be added to the mixture before and/or after removal of the excess alcohol B by distillation. The resulting compounds containing hydroxyl groups may be used as starting material for the production of polyurethane resins by the isocyanate polyaddition process.

摘要翻译： 制备含有醇羟基的化合物，其通过多异氰酸酯加聚产物的醇解作为异氰酸酯加成反应过程的起始原料。 将尿素基团与氨基甲酸酯基摩尔比为1:20至1:0的聚氨酯脲或聚脲废物与尺寸减小的形式一起加热至120℃至250℃的温度，以及B）中的多元醇 分子量范围为62-250，A:B的重量比为3:1至1:10。 随后通过减压蒸馏除去至少10％的多元醇B投入该方法。 基于聚氨酯脲或聚脲废物A的重量，总计高达1000重量％的一种或多种分子量高于250的多羟基化合物（其在蒸馏条件下是不挥发的）可以任选地加入到 通过蒸馏除去过量的醇B之前和/或之后的混合物。 所得到的含羟基的化合物可以用作通过异氰酸酯加聚方法生产聚氨酯树脂的原料。