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US 4,623,674 AGranted
Polymer/polyols of substituted styrenes and polyurethanes made therefrom
AssigneeUnion Carbide Corporation
InventorFrederick E. Bailey, Jr.
Life of this patent
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Abstract
Stable dispersions of poly(para-methylstyrene), poly(vinyltoluene) and other substituted styrenes can be made in polyether polyols and thereafter formed into polyurethanes. The polymer/polyols made from substituted styrenes have low viscosity and good particle size and distribution.
Claims21
A polymer/polyol dispersion which is useful in the preparation of polyurethanes comprising:
- (a) a polyol having a hydroxy number from about 20 to about 250;
- and
- (b) a polymer containing a substituted styrene monomer of the general formula ##STR5## where R is not in the ortho position and is an alkyl group containing one to four carbon atoms and may be substituted or unsubstituted, wherein the total amount of polymer dispersed in the polyol is from about 5 to 55 weight percent, based on the total weight of the dispersion with the proviso that the polymer contain less than 20 weight percent, based on the total weight of the polymer, of acrylonitrile when comonomers are employed.
Dependencies are inferred from the claim text.