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US 5,106,908 AGranted
Polyorganosiloxane/polyvinyl-based graft (meth)acrylate polymers
AssigneeGeneral Electric Company
InventorsMuhanad A. Alsmarraie, Stanley Y. Hobbs, I-chung W. Wang, Vicki H. Watkins
Life of this patent
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Abstract
A multi-stage polyorganosiloxane/polyvinyl-based graft polymer is provided by the co-homopolymerization of organosiloxanes and a vinyl-based monomer (e.g. styrene) and the subsequent graft polymerization of one or more stages of additional (meth)acrylate monomers, vinyl aromatic/(meth)acrylate comonomers or vinyl aromatic/vinyl cyanide/(meth)acrylate termonomers with or without an intermediary stage comprising a polymer.
Claims15
A multi-stage polyorganosiloxane/polyvinyl-based graft polymer composition comprising:
- (a) as a first stage, a substrate selected from
- (i) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer and at least one vinyl-based polymer;
- (ii) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer, at least one vinyl-based polymer, and units which are derived from a cross-linking agent or agents;
- (iii) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer, at least one vinyl-based polymer, and units which serve as a graft-linking agent or agents;
- (iv) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer, at least one vinyl-based polymer, units which are derived from a cross-linking agent or agents and units from the same or different agent or agents which serve as a graft-linking agent or agents;
- or
- (v) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer, at least one vinyl-based polymer, and a mixture of any of units which are derived from a cross-linking agent or agents, units which serve as a graft-linking agent or agents, or units derived from cross-linking agent or agents and units from the same or different agent or agents which serve as a graft-linking agent or agents;
- and
- (b) at least one subsequent stage or stages graft polymerized in the presence of any previous stage and which is comprised of a (meth)acrylate polymer, a vinyl aromatic/(meth)acrylate copolymer or a vinyl aromatic/vinyl cyanide/(meth)acrylate terpolymer.
6 more elements
Dependencies are inferred from the claim text.