发明名称 |
Stable particulate dispersions |
摘要 |
A composition comprising a particulate dispersion of from 50% to 98.9% by weight of a siloxane-polyoxyalkylene copolymer surfactant, from 1% to 49.9% by weight of a nonionic organic surfactant other than the siloxane-polyoxyalkylene copolymer surfactant and from 0.1% to 25% by weight, based on the total weight of the composition, of a particulate material having a particle size of less than 20 microns, is described. A method of preparing such a composition, and polyurethane and polyisocyanurate foams containing such a composition are also described. The nonionic organic surfactant is preferably an ethoxylated nonylphenol. The particulate material is preferably a hydrophobic precipitated silica. The composition of the invention is useful as an additive in the preparation of rigid polyurethane and polyisocyanurate foams.
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申请公布号 |
US5691392(A) |
申请公布日期 |
1997.11.25 |
申请号 |
US19970795736 |
申请日期 |
1997.02.05 |
申请人 |
PPG INDUSTRIES, INC. |
发明人 |
OKOROAFOR, MICHAEL O.;MCDONALD, WILLIAM H.;WANG, ALAN E. |
分类号 |
C08J9/00;(IPC1-7):C08G18/00 |
主分类号 |
C08J9/00 |
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