Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1996-12-18
1998-01-20
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
252350, 521 76, 521122, 521 79, 523219, C08J 900
Patent
active
057101892
ABSTRACT:
The present invention relates to a composition for use as a blowing agent in injection molding processes. More specifically, the present invention is a blowing agent composition comprising a molecular sieve and a foaming agent, wherein the foaming agent is carded by the molecular sieve and evolves to form foamed plastic products. In addition, the present invention is a method for preparing a blowing agent composition and a foamable blowing agent-resin mixture. Furthermore, the present invention is a foamed plastic resin containing a molecular sieve. Additionally, the present invention provides a composition and method for foaming moisture-sensitive polymers comprising the addition of molecular sieves and a poly-hydroxy ester. The present invention also advances a method of encapsulating a blowing agent on a polymer substrate and a corresponding encapsulated blowing agent composition.
REFERENCES:
patent: 4167611 (1979-09-01), Czarnecki et al.
patent: 4518718 (1985-05-01), Frost
patent: 5177117 (1993-01-01), Coe et al.
patent: 5401785 (1995-03-01), Kumagai et al.
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