Addition polymerizable adduct of a polymeric monoahl and an unsaturated isocyanate
AssigneeThe Dow Chemical Company
InventorDwight K. Hoffman
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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.
Claims9
An ethylenic addition polymerizable adduct of a monoahl and an active ethylenically unsaturated isocyanate monomer, said monoahl being an organic compound containing only one active hydrogen moiety capable of reacting with the isocyanate moiety of the isocyanate monomer to form the adduct, said adduct being represented by the formula:
- Y--(R'"A--.sub.m R'"-Z
- wherein each A is individually --O--, --S-- or ##STR6## wherein R.sub.1 is hydrogen or alkyl;
- Y is oxyalkyl or oxyaryl;
- Z is an oxycarbonylaminoalkyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid;
- each R'" is individually alkylene, arylene hydroxyalkylene, aminoalkylene, alkoxyalkylene, aryloxyalkylene, arylalkylene, hydroxyarylalkylene or haloalkylene;
- and m is a whole number such that --R'"A--.sub.m R'"-- has a number average molecular weight from about 60 to about 100,000 and being capable of stabilizing a dispersion of a polymer comprising the adduct in a continuous liquid phase.
Dependencies are inferred from the claim text.