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United States Patent | 5,009,810 |
Wason , et al. | April 23, 1991 |
A stabilized powdered endothermic blowing agent which is a mixture of a polycarboxylic acid and an inorganic carbonate, and polycarboxylic acid and inorganic carbonate each having been surface treated with a component which prevents water from being absorbed thereby. The blowing agent is incorporated into a polymeric concentrate used for producing foamed products.
Inventors: | Wason; Satish K. (Bel Air, MD), Mooney; Gerry (Ajax, CA), Andrews; Claude R. (Havre de Grace, MD), Tarquini; Michael E. (Havre de Grace, MD), Kosin; John A. (Bel Air, MD), Garcia; Rod A. (Orange, TX) |
Assignee: |
J. M. Huber Corporation
(Rumson,
NJ)
|
Appl. No.: | 07/352,307 |
Filed: | May 16, 1989 |
Current U.S. Class: | 516/11 ; 252/183.12; 516/19; 521/56; 521/57; 521/59; 521/60; 521/76; 521/92; 521/93; 521/97 |
Current International Class: | C08J 9/08 (20060101); C08J 9/00 (20060101); C08J 009/08 (); C08J 009/224 () |
Field of Search: | 521/56,57,59,60,76,92,93,97 252/350,183.12 |
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