One part activator and blowing agent for foaming plastics

Details One part activator and blowing agent for foaming plastics One part activator and blowing agent for foaming plastics

1983-09-27

1985-01-01

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

264 54, 264DIG5, 521 81, 521 85, 521 92, 521139, 521143, 521146, 521149, 521150, B29H 720

Patent

active

044915543

ABSTRACT:
A one-part activator and blowing agent system for foaming plastics comprising an alkali metal borohydride and a salt hydrate blended in a single pellet or as separate pellets with a dry inert resinous polymer carrier. The one-part system is blended with a resinous polymer and then the blend extruded at a temperature at which the blend becomes molten such that the salt hydrate releases its water of hydration to hydrolyze the borohydride and produce a cellular article.

REFERENCES:
patent: 2758980 (1956-08-01), Talaloy et al.
patent: 2909493 (1959-10-01), Bush
patent: 2930771 (1960-03-01), Wade
patent: 2951819 (1960-09-01), Wade
patent: 3167520 (1965-01-01), Wade
patent: 3331790 (1967-07-01), Scheurlen et al.
patent: 3393260 (1968-07-01), Miler
patent: 4394458 (1983-07-01), Wade
patent: 4397948 (1983-08-01), Wade
patent: 4399238 (1983-08-01), Wade

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