发明授权
US4013701A Process for the production of polyisocyanates 失效
生产聚异氰酸酯的方法

Process for the production of polyisocyanates
摘要:
The instant invention relates to a process for producing modified polyisocyanates suitable for the production of hydrophilic foams, wherein an organic polyisocyanate is heat treated with a water-containing, organic sulphonic acid at a specified molar ratio and for a specified time. The invention further relates to the use of such modified polyisocyanates in producing a hydrophilic polyurethane foam.
信息查询
0/0