Method of molding expandable styrene type resin particles

Details Method of molding expandable styrene type resin particles Method of molding expandable styrene type resin particles

1996-05-16

1997-11-04

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264126, B29C 4402

Patent

active

056836376

ABSTRACT:
A foamed article of styrene type resin, in which base resin particles are styrene type resin particles obtainable by a graft polymerization of a cis-rich polybutadiene with a styrene type monomer, a blowing agent contains n-pentane as its main component and the foamed article shows a density of 0.015-0.040 g/cm.sup.3, an average foam diameter of 60-300 micrometers and a closed cell foam rate of not less than 50%.

REFERENCES:
patent: 2857340 (1958-10-01), Colwell
patent: 3996311 (1976-12-01), Westphal et al.
patent: 5290819 (1994-03-01), Witt et al.

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