Production of vinyl halide resins for clear solutions

Details Production of vinyl halide resins for clear solutions Production of vinyl halide resins for clear solutions

1985-12-23

1988-10-04

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528487, 528490, 524834, 526199, 526200, 5263442, 526345, C08F 624, C08F 220

Patent

active

047757426

ABSTRACT:
A process is disclosed for producing vinyl halide homopolymers and copolymers that are suitable for use in clear solutions. The process comprises reacting vinyl halide and optional co-monomers in the presence of an aqueous medium containing a suspending agent, and treating the resulting resin particles with an acidic material. The resins resulting from the process of the invention have improved solution and film properties. When the resin is dissolved in a suitable solvent, the resulting solution has improved clarity, that is, a reduction of haze in the solution phase. When the solution is coated on a substrate and the solvent evaporated, either to provide a coated substrate or a cast film, the resulting films have improved clarity, that is, a reduction in haze in the film. The films and coatings have improved gloss as a result of reduction of seed particles in the film. Fibers produced from the resin solutions have improved integrity and strength. The solutions, films, coatings and fibers can be clear or colored as a result of the inclusion of dyes and pigments.

REFERENCES:
patent: 2137627 (1938-11-01), Reed
patent: 2482048 (1949-09-01), Williams
patent: 4133947 (1979-01-01), Kalka et al.
patent: 4184029 (1980-01-01), Kalka et al.
"Encyclopedia of PUC" L. I. Nass (ed.) Marcel Dekker, Inc. N.Y., N.Y. (1976) pp. 122, 124.
Translation of Ge. Offen. 2,206,903 to Bauer et al., laid-open 8/'73.

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