Low inherent viscosity-high glass transition temperature enhancing agents produced by suspension polymerization as an overpolymer on polyvinyl chloride resins

A low inherent viscosity-high glass transition temperature agent treated polyvinyl chloride resin, comprising:

• a polyvinyl chloride resin and a polyvinyl chloride high glass transition temperature-inherent viscosity enhancing agent,
• said high glass transition temperature-inherent viscosity enhancing agent applied in a suspension to said polyvinyl chloride resin, said polyvinyl chloride high glass transition temperature-inherent viscosity agent made by suspension polymerizing one or more high glass transition temperature agent forming monomers in the presence of an effective amount of a substantially water insoluble chain transfer agent so that the inherent viscosity of said treated polyvinyl chloride resin is reduced, the amount of said chain transfer agent being from about 0.3 milliequivalents to about 20 millequivalents for every 100 parts by weight of said glass transition temperature agent forming monomers, wherein said high glass transition temperature agent forming monomer is a styrene-type monomer, a vinyl nitrile, a maleimide, an indene, a norbornene, an unsaturated acid anhydride, or combinations thereof, the amount of said polyvinyl chloride resin being from about 50 parts to about 2,000 parts by weight for every 100 parts by weight of said one or more monomers.