Foam plastic and method of manufacturing the same

Details Foam plastic and method of manufacturing the same Foam plastic and method of manufacturing the same

1998-06-01

1999-02-23

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Producing or treating porous product

522186, 521 56, 521 59, 521 79, 521 81, 521139, 521140, 521915, C08F 246

Patent

active

058740422

ABSTRACT:
The present invention aims to improve soundproof and heat insulating properties of a foamed plastic by reducing internal cells pressure inside foamed resins. A base polymer such as a polyester-based polyol and a volatile foaming agent having an conjugate unsaturated group (i. e., conjugate double carbon bonds and/or triple carbon bonds) such as chloroprene (bp. 51.degree. C.) and calcium stearate were blended and then mixed with a hardening agent such as hexamethylene diisocyanate. The volatile foaming agent existing in open cells of the foamed plastic sealed in the Al laminated film and between the film and the foamed plastic, i.e., gap, possesses an unsaturated group, such as isoprene. Thus polymerization may occur by irradiating with electron rays, and the inside of the foams and the gap region may be reduced in pressure while the bag of the laminated film retains its shape.

REFERENCES:
patent: 2928130 (1960-03-01), Gray
patent: 2956960 (1960-10-01), Nemphos
patent: 3386926 (1968-06-01), Govoret
patent: 3976605 (1976-08-01), Matsunaga et al.
patent: 4181781 (1980-01-01), Chandalia et al.
Database WPI, JP-A-52 016 597 (Mitsui Fluoro. Chem.), Feb. 7, 1977 Abstract.
Database WPI, JP-B-46 037 899 (Agency of Industrial Science & Technology), Nov. 8, 1971 Abstract.
Database WPI, JP-A-44 019 394 (Daikin Kogyo Co., Ltd.), Aug. 22, 1969 Abstract.

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