Production of encapsulated chemical foaming concentrates

Details Production of encapsulated chemical foaming concentrates Production of encapsulated chemical foaming concentrates

1995-03-09

1997-03-18

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

264122, 264178R, 264DIG5, 425202, 42840224, 521 76, C09K 300, B32B 2700

Patent

active

056119623

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 carbon dioxide, nitrogen or hydrogen or mixtures thereof as the active foaming gas.

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patent: 5009809 (1991-04-01), Kosin et al.
patent: 5234963 (1993-08-01), Garcia et al.

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