Abstract: Polyamide compositions and blends toughened with polyvinylbutyral comprising from 10 to 45 wt % mineral filler are disclosed.

Abstract: Multi-stage rubber-based MBS resin compositions are provided which include a polymeric substrate stage of a conjugated diolefin-based polymer or copolymer and optional units derived from a cross-linking agent or agents, and at least one polymeric graft stage graft polymerized in the presence of the substrate stage which include monomers of an acrylate, a vinyl aromatic, or a mixture of those monomers and optional units derived from a cross-linking agent or agents and/or units which serve as a graft-linking agent or agents wherein the weight ratio of acrylate in all graft stages combined to vinyl aromatic in all graft stages combined is at least 1.2:1. Additionally, modified vinyl chloride polymer compositions which include a vinyl chloride polymer or copolymer in combination with an impact modifying, yellowness index improving amount of the multi-stage rubber-based resin compositions above are provided.

Abstract: The impact resistance of polyimides is improved by the addition of impact modifiers comprising, as a first stage, an elastomeric polydiorganosiloxane optionally polymerized simultaneously with but separately from one or more vinyl monomers, and as at least one grafted subsequent stage a polymer or copolymer of acrylonitrile, methacrylonitrile, a vinyl aromatic compound, (meth)acrylic acid, alkyl (meth)acrylate or (meth)acrylamide monomer.

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.

Abstract: Thermoplastic molding compositions are provided which comprise polycarbonate resins, polyester resins and polyphenylene ether resins or various combinations thereof modified with a multi-stage polyorganosiloxane/polyvinyl-based graft (meth)acrylate polymer. When the resultant compositions are molded, impact strength, ductility, tendency to agglomerate, rubber dispersion, blend morphology, weld line strength, and thermal stability are improved with no delamination or surface mottling.

Abstract: Polyphasic resin blends and particularly polycarbonate/polyester blends, are prepared with modifiers comprising combinations of polyorganosiloxane/polyvinyl-based graft copolymer(s), polyorganosiloxane-based graft copolymer(s) and/or diene rubber-based graft copolymer(s), imparting a wide range of physical properties to the blends.

Abstract: Thermoplastic molding compositions are provided which comprise a polyphenylene ether resin alone or in combination with a polystyrene resin modified with a multi-stage polyorganosiloxane/polyvinyl-based graft polymer which exhibit materially enhanced impact strength, flame resistance, moldability and flow properties and other desirable properties without showing surface mottling or a tendancy to delaminate.

Abstract: A multi-stage polyorganosiloxane/polyvinyl-based graft polymer is provided by the co-homopolymerization of a silicone polymer and a polyvinyl polymer (e.g. polystyrene) and the subsequent graft polymerization of one or more stages of additional vinyl-type polymers. When the isolated multi-stage graft polymers are combined with thermoplastic resins and are molded, impact strength, weld line strength and thermal stability are markedly improved with no tendency to delaminate.

Abstract: Polycarbonate and polyester blends are prepared with a combination of modifiers comprising a multi-stage polyorganosiloxane-based graft polymer composition and a diene rubber-based graft polymer composition imparting a wide range of excellent physical properties on the PC and PE blends.

Abstract: Thermoplastic molding compositions are provided which comprise a polyester resin alone or in combination with a poly(etherester) elastomer, a poly(etherimide ester) elastomer, or a mixture of the foregoing modified with a multi-stage polyorganosiloxane/polyvinyl-based graft polymer which exhibit materially enhanced impact strength, particularly at low temperatures, while maintaining other desirable properties without showing any tendency to delaminate. Particularly noteworthy are reductions in surface gloss and the substantially complete elimination of mottling.

Abstract: Thermoplastic molding compositions are provided which comprise a polycarbonate resin alone or in combination with a saturated polyester resin and/or a poly(etherester) elastomer, a poly(etherimide ester) elastomer or a mixture thereof; a polyphenylene ether resin and a saturated polyester resin; a polyphenylene ether resin, a saturated polyester resin and a polycarbonate resin; or mixtures thereof modified with multi-stage polyorganosiloxane/polyvinyl-based graft polymers which exhibit markedly improved impact strength and weld line strength with no tendency to delaminate or to show mottled surfaces after molding.

Abstract: Thermoplastic resin compositions are blended with a novel silicone-based flame retardant which also imparts good impact resistance and low temperature ductility on the thermoplastic resins. Polyorganosiloxanes are grafted with vinyl-based polymers, such as bromostyrenes, capable of exhibiting flame retarding properties and then blended with normally flammable thermoplastic resins.

Abstract: Articles made from normally glossy thermoplastic polymer resins are flatted to reduce gloss by the addition of multi-stage polyorganosiloxane/polyvinyl-based graft polymer flatting agent compositions.

Abstract: The impact strengths of linear polyesters such as poly(ethylene terephthalate) and poly(1,4-butylene terephthalate) are improved, particularly at low temperatures, by the incorporation therein of a core-shell impact modifier. The core therein is a crosslinked elastomeric polymer of at least one conjugated diene such as butadiene and has a volume average particle size in the range of about 90-700 nanometers. The grafted shell is a copolymer of at least one vinyl aromatic compound such as styrene and at least one polymerizable nitrile such as acrylonitrile.