Low inherent viscosity-high glass transition temperature enhancing agents produced by mass reaction polymerization as an overpolymer on polyvinyl chloride resins
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United States of America Patent
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May 22, 1990
Grant Date -
N/A
app pub date -
Aug 14, 1987
filing date -
Aug 14, 1987
priority date (Note) -
Expired
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Abstract
Polyvinyl chloride resins are treated with a low inherent viscosity-high glass transition temperature enhancing agent to impart improved processing properties thereto, especially melt flow, which are desirable in various melt type fabrication processes such as custom injection molding. The high glass transition temperature-inherent viscosity enhancing agent is made by polymerizing one or more high glass transition temperature agent forming monomers in the presence of a chain transfer agent. The agent has a high glass transition temperature as well as a low inherent viscosity. The high glass transition temperature-inherent viscosity enhancing agent is produced as an overpolymer in a mass polymerization reaction.
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