发明名称 |
Isocyanate compositions for low density polyurethane foam |
摘要 |
Improved low density polyurethane foams are prepared from an isocyanate-terminated prepolymer having an NCO content of more than about 31 to about 33.5% by weight comprising: (a) a polyphenylene polymethylene polyisocyanate comprising (i) about 30 to about 100% by weight of diphenylmethane diisocyanate and (ii) the remainder selected from the group consisting essentially of higher homologues of polyphenylene polymethylene polyisocyanate, isocyanate-containing ester groups, urea groups, biuret groups, aliphatic groups, carbodiimide groups, isocyanurate groups, uretdione groups and urethane groups; and (b) a polyoxyalkylene polyol having an oxyethylene content of about 30 to about 90%, a molecular weight of about 1000 to about 12000 and a functionality of about 2 to about 8.
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申请公布号 |
US6133481(A) |
申请公布日期 |
2000.10.17 |
申请号 |
US19980021502 |
申请日期 |
1998.02.10 |
申请人 |
SINGH, SACHCHIDA NAND;CARTMELL, MICHAEL JOHN;HOLLOWAY, JAMES |
发明人 |
SINGH, SACHCHIDA NAND;CARTMELL, MICHAEL JOHN;HOLLOWAY, JAMES |
分类号 |
C08G18/10;C08G18/48;C08G18/76;(IPC1-7):C07C49/23 |
主分类号 |
C08G18/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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