Resilient hydrophobic foamed polymer

Details Resilient hydrophobic foamed polymer Resilient hydrophobic foamed polymer

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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Saunders et al., Polyurethanes, Part I, pp. 219-228; Part II, pp. 43, 44, 99-103, 173, Interscience (N.Y.) 1962 and 1964.

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