Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-11-10
1993-08-10
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 57, 521 79, 521 91, 521 92, 521 97, 521143, 521180, C08J 9224
Patent
active
052349632
ABSTRACT:
The present invention is directed to the process and apparatus for compounding and pelletizing of chemical foaming agents in a high melt resin carrier and producing unique, uniform encapsulated and pelletized chemical foaming concentrates. More specifically, the present invention is directed to the compounding, encapsulating and pelletizing in a high melt resin carrier a highly loaded concentration (5 to 70 wt %) of foaming agents which include an endothermic foaming agent, an exothermic foaming agent or hybrid combinations of these two such that when incorporated into a thermoplastic resin to produce a foamed product will chemically react to form a mixture of carbon dioxide, nitrogen or hydrogen as the active foaming agent.
REFERENCES:
patent: Re26278 (1967-10-01), Pottenger
patent: 3026272 (1962-03-01), Rubens et al.
patent: 3026273 (1962-03-01), Engles
patent: 3121132 (1964-02-01), Del Bene
patent: 3160688 (1964-12-01), Ayranian et al.
patent: 5009809 (1991-03-01), Kosin et al.
patent: 5009810 (1991-03-01), Wason et al.
patent: 5045570 (1991-09-01), Mooney et al.
patent: 5106534 (1992-04-01), Wason et al.
Garcia Rodrigo A.
Gho Joseph G.
Foelak Morton
GAIA Research
Myers Kurt S.
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