Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1980-10-08
1983-07-19
Lieberman, Paul
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525404, 525411, 525412, 525440, 525455, 525920, 560160, C08L 7102, C08L 7508
Patent
active
043944914
ABSTRACT:
An adduct of a monoahl, e.g., a monohydroxyl polyalkylene oxide, and an active ethylenically unsaturated isocyanate, e.g., 2-isocyanatoethyl methacrylate, is usefully employed in the preparation of stable copolymer dispersions of the type used in the production of polyurethane foams and polyurethane elastomers.
The copolymer dispersion is prepared by addition copolymerization of (1) the adduct with (2) ethylenically unsaturated monomer(s), e.g., styrene or mixture thereof with acrylonitrile, while (1) and (2) are dispersed or dissolved in an excess of an active hydrogen polyfunctional compound.
REFERENCES:
patent: 2718516 (1955-09-01), Bortnick
patent: 2882259 (1959-04-01), Graham
patent: 3453223 (1969-07-01), Suling
patent: 3641199 (1972-02-01), Niederhauser
patent: 3924023 (1975-12-01), Boranian
patent: 3928299 (1975-12-01), Rosenkranz
patent: 4008247 (1977-02-01), Tucker
patent: 4233245 (1980-11-01), Tefertiller
patent: 4239866 (1980-12-01), Reitel
Lieberman Paul
The Dow Chemical Company
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