Low inherent viscosity-high glass transition temperature enhanci

Details Low inherent viscosity-high glass transition temperature enhanci Low inherent viscosity-high glass transition temperature enhanci

1987-08-14

1989-03-21

Ziegler, Jacob

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525261, 525285, 525289, 525317, C08F25904, C08F26900

Patent

active

048143871

ABSTRACT:
Various fabrication properties of polyvinyl chloride are improved such as melt flow by treating the polyvinyl chloride resin with a low inherent viscosity-high glass transition temperature enhancing agent. The treatment occurs as a suspension overpolymerization on the polyvinyl chloride resin by reacting at least one high glass transition temperature enhancing agent with at least one substantially water insoluble chain transfer agent. The formed high glass transition temperature-low inherent viscosity agent imparts a high glass transition temperature to the polyvinyl chloride resin and also reduces the inherent viscosity to a level below the inherent viscosity formed by the combined effect of the polyvinyl chloride resin and the glass transition temperature agent.

REFERENCES:
patent: 3997704 (1976-12-01), Aurichio
patent: 4267084 (1981-05-01), Mizitani et al.

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