Process for continuously recycling water soluable resin

Details Process for continuously recycling water soluable resin Process for continuously recycling water soluable resin

1992-10-14

1994-03-01

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264317, B29C 3376

Patent

active

052904938

ABSTRACT:
The present invention relates to a process for continuously recycling water soluble resin whereby a resin solution including about 6-12 percent by weight of resin is sprayed onto a core made of the resin. The resin used for the solution and core is selected from polyacrylic acid, copolymers of acrylic acid and acrylamide, copolymers of acrylic acid salt and ethyl acrylate, copolymers of acrylamide and acrylic acid, polymethacrylic acid, and copolymers of vinyl alcohol and vinyl acetate. The spraying of the resin solution dissolves the core to form a polymer suspension from which resin is recovered for reuse.

REFERENCES:
patent: 4108931 (1978-08-01), Ogden
Belland AG, Konigshof, "Dispersible Plastics: A New Route to Lost-Core Techniques," Modern Plastics International, Nov. 1989, pp. 7-8.

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