Abstract: The invention provides novel polyethylene terephthalate resin compositions including: 1 to 30 wt % of an impact modifier component, and 99 to 70 wt % of a polyethylene terephthalate resin component. The impact modifier component includes graph copolymer particles having a core portion at least partially grafted to a shell portion. The core portion is obtained by enlarging the particle size of a rubber particle having an average particle size of at most 0.1 &mgr;m, and includes a butadiene (co)polymer obtained by polymerizing 30 to 100 wt % of butadiene, 70 to 0 wt % of an aromatic vinyl copolymer or an aromatic (meth)acrylate, 10 to 0 wt % of a vinyl monomer copolymerizable therewith, and 5 to 0 wt % of a cross-linking agent. The shell portion is obtained by polymerizing: 30 to 100 wt % of an aromatic vinyl compound, 70 to 0 wt % of an alkyl (meth)acrylate, and 0 to 20 wt % of a vinyl monomer. In one embodiment, the concentration of rubber in the core portion ranges from 20 to 85 weight percent.

Abstract: The invention provides compositions including a population of particles having a void-containing rubber portion wherein the proportion of the voids ranges from 1 to 90%. In one embodiment, the rubber portion ranges from 20 to 90 weight percent; and in another embodiment from 92 to 100 weight percent, of the individual particles. In the former embodiment, a crosslinking agent can be present. If not present, at least one of the following conditions must exist: 1. the polymeric composition includes at least 1 weight percent of a processing oil component, 2. the polymeric composition includes at least 2 weight percent of a processing aid component; 3. the polymeric composition contains at least two populations of particles, wherein each has a rubber-containing portion, and wherein the difference is in at least one of the following: their void concentration, their chemical composition, their average particle size, or their shape; and 4.

Abstract: The invention provides novel chlorinated vinyl chloride resins including a chlorinated vinyl chloride resin component and an impact modifier component. In one embodiment, the chlorinated vinyl chloride resin compositions includes: 100 parts by weight of a chlorinated vinyl chloride resin having a combined chlorine content of 62 to 70 wt. %, and an impact modifier component which consists essentially of one of the following blends: a blend including an ABS resin and an acrylic modifier resin, or a blend including an ABS resin and an MBS resin.

Abstract: The invention provides polymeric compositions having an MBS resin in the form of a powder prepared by: coagulating an MBS resin having the following compositional relationships: