发明授权
- 专利标题: Process for the production of polyisocyanates
- 专利标题(中): 生产聚异氰酸酯的方法
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申请号: US575849申请日: 1975-05-08
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公开(公告)号: US4013701A公开(公告)日: 1977-03-22
- 发明人: Gert Jabs , Gunther Loew
- 申请人: Gert Jabs , Gunther Loew
- 申请人地址: DT Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DT Leverkusen
- 优先权: DT2441843 19740522
- 主分类号: C08G18/00
- IPC分类号: C08G18/00 ; C07C67/00 ; C07C239/00 ; C07C241/00 ; C07C265/10 ; C07C265/12 ; C08G18/08 ; C08G18/72 ; C08G18/77 ; C08G18/78 ; C08G18/80 ; C07C119/042 ; C07C119/045 ; C07C119/048
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.
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