Method of preparing a urethane prepolymer and polymer

Details Method of preparing a urethane prepolymer and polymer Method of preparing a urethane prepolymer and polymer

1982-02-22

1984-03-27

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521905, 528 76, 528 80, 528 83, 528903, 528904, C08G 1814

Patent

active

044395523

ABSTRACT:
A method of forming a hydrophilic urethane prepolymer comprising the steps of reacting an isocyanate compound to a hydrophilic polyether or polyester compound which has been heated to such a temperature that the temperature of the reactants after addition of isocyanate is at least as high as about 120.degree. C. The resulting urethane prepolymer may be reacted with water to form a cellular urethane polymer.

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patent: 3723393 (1973-03-01), Kistner
patent: 3805531 (1974-04-01), Kistner
patent: 3805532 (1974-04-01), Kistner
patent: 3812619 (1974-05-01), Wood et al.
patent: 3814736 (1974-06-01), Gibier-Rambaud et al.
patent: 4127515 (1978-11-01), MacRae et al.
patent: 4241537 (1980-12-01), Wood
Chemical Engineering Progress, vol. 57, No. 10, Oct. 1961, pp. 48-51.

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