Production of encapsulated chemical foaming concentrates
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United States of America Patent
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Aug 10, 1993
Issued Date -
N/A
app pub date -
Nov 10, 1992
filing date -
May 13, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
Patent Citation Ranking
- 15 Citation Count
- C08J Class
- 54.71 % this patent is cited more than
- 32 Age