发明名称 |
Polyurethane coatings for bridge deckings and the like |
摘要 |
Novel polyurethane formulations especially useful as membranes for the protection of bridge deckings. The polyurethane is prepared by mixing two components, A and B. Component A consists essentially of a low-molecular weight polyol, e.g., glycerol; a poly(oxypropylene) triol; and an elastomer. Component B is a special MDI, either a mix of 4,4'- and 2,4'-isomers of diphenylmethane diisocyanate or a mix of 4,4'-diphenylmethane diisocyanate and its reaction product with a low molecular weight poly(oxypropylene).
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申请公布号 |
US4788269(A) |
申请公布日期 |
1988.11.29 |
申请号 |
US19880141452 |
申请日期 |
1988.01.07 |
申请人 |
W. R. GRACE & CO.-CONN. |
发明人 |
VU, CUNG;BUXBAUM, SUSAN P.;BLANK, NORMAN E.;HARTWIG, RICHARD C. |
分类号 |
C08G18/08;C08G18/65;C08G18/66;C08G18/69;C08G18/76;C08G18/80;(IPC1-7):C08G18/10;C08G18/30 |
主分类号 |
C08G18/08 |
代理机构 |
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代理人 |
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主权项 |
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