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US 2002/0173590 A1Published application
Low-gloss blends containing poly(meth)acrylate rubber-based graft copolymer and process for making thereof
AssigneeGeneral Electric Company
InventorAlbin P. Berzinis
Life of this patent
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Abstract
A process for controlling the surface gloss of a molded composition of: (a) a polyvinyl chloride resin and (b) a graft copolymer comprising a discontinuous poly(alkyl (meth)acrylate) rubber phase and a rigid thermoplastic phase, wherein at least a portion of rigid thermoplastic phase is chemically grafted to the poly(alkyl (meth)acrylate) rubber phase, by regulating the cross-link density and thus the swell index of the rubber phase in the graft copolymer to at least about 8 to vary the surface gloss after extrusion.
Claims12
A method of controlling the surface gloss of a composition of:
- (a) a polyvinyl chloride resin and (b) a graft copolymer comprising a discontinuous poly(alkyl (meth)acrylate) rubber phase and a rigid thermoplastic phase, wherein at least a portion of rigid thermoplastic phase is chemically grafted to the poly(alkyl (meth)acrylate) rubber phase, said method comprises regulating the swell index of the rubber phase in component (b) to at least about 8 to vary the surface gloss after extrusion in inverse proportion to the swell index.
Dependencies are inferred from the claim text.