Vinylidene chloride type resin expandable particles, foam partic

Details Vinylidene chloride type resin expandable particles, foam partic Vinylidene chloride type resin expandable particles, foam partic

1985-06-20

1986-09-23

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 53, 264DIG5, 264DIG9, 264DIG15, 521 56, 521 58, 521145, C08V 918, B29H 720

Patent

active

046136266

ABSTRACT:
This invention discloses a vinylidene chloride resin type in-mold foam molding having a broad cross-sectional area and a free shape, useful as thermal insulating plate materials or anti-shock molded vessels, and foam particles or expandable particles convenient for preparation thereof, and also a series of advantageous foaming techniques for completion of such a molding. The above foam molding can be prepared by bringing fine particles of a non-crystalline vinylidene chloride type resin obtained generally by suspension polymerization into contact with a volatile organic blowing agent thereby impregnating the resins with the blowing agent to form expandable resin particles, which are in turn subjected to expansion as such, or after forming into pre-expanded foam particles including expandable gas therein, by filling in a mold cavity which can be closed but not sealed, under heating to form a molding through fusion mutually between the expanded particles.

REFERENCES:
patent: 3615972 (1971-10-01), Morehouse, Jr. et al.
patent: 3983080 (1976-09-01), Suh et al.
patent: 4075138 (1978-02-01), Garner
patent: 4477599 (1984-10-01), Otsu et al.
patent: 4550003 (1985-10-01), Sakata et al.

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