Susan R Poulin

US Patent:

44915543, Jan 1, 1985

Filed:

Sep 27, 1983

Appl. No.:

6/536332

Inventors:

Roger G. Hamel - Methuen MA
Susan B. Poulin - Woburn MA

Assignee:

Thiokol Corporation - Chicago IL

International Classification:

B29H 720

US Classification:

264141

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.

US Patent:

45201374, May 28, 1985

Filed:

Oct 18, 1984

Appl. No.:

6/635016

Inventors:

Roger G. Hamel - Methuen MA
Susan B. Poulin - Woburn MA

Assignee:

Morton Thiokol Inc. - Chicago IL

International Classification:

C08J 906
B29N 720

US Classification:

521 79

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.