Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1979-11-05
1981-05-05
Cockeram, H. S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521174, 521122, 521905, 521914, C08G 1814, C08G 1812, C08G 1848
Patent
active
042660432
ABSTRACT:
A resilient hydrophobic foamed polymer obtained by reacting a mixture of an isocyanate terminated urethane prepolymer and a polyisocyanate (A) with aqueous material, said prepolymer being relatively hydrophilic and the reaction product of a molar excess of a polyisocyanate (B) with a polyetherpolyol having from 15 to 50% by weight of oxethylene content, said aqueous material having a water content between about 15 to 150% by weight based on said prepolymer, the amount of said polyisocyanate (A) ranging between about 5 to 15% by weight based on said prepolymer, said polyetherpolyol being selected from the group consisting of (a) the addition polymerization product of a starting material, ethylene oxide and another epoxide and (b) a mixture of at least two of the following:
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Fujii Osamu
Kishimoto Toshio
Kobayashi Akio
Cockeram H. S.
Palmer Carroll F.
Toyo Rubber Chemical Industrial Corporation
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