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United States Patent | 5,250,224 |
Wason , et al. | October 5, 1993 |
A stabilized powdered endothermic blowing agent which is a mixture of a polycarboxylic acid and an inorganic carbonate, the 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. (Belair, MD), Mooney; Gerry (West Ajax, CA), Andrews; Claude R. (Pasadena, MD), Tarouini; 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.: | 07/856,988 |
Filed: | March 30, 1992 |
Application Number | Filing Date | Patent Number | Issue Date | ||
688227 | Apr., 1991 | 5106534 | |||
352307 | May., 1989 | 5009810 | |||
Current U.S. Class: | 516/11 ; 516/19; 521/57; 521/92; 521/97 |
Current International Class: | C08J 9/08 (20060101); C08J 9/00 (20060101); C08J 009/224 () |
Field of Search: | 521/92,97,57 252/350 |
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US. patent application Ser. No. 07/467,584, filed Jan. 19, 1990, which will issue as U.S. Pat. No. 5,009,809 on Apr. 23, 1991. . U.S. patent application Ser. No. 07/467,585, filed Jan. 19, 1990. . U.S. patent application Ser. No. 07/467,587, filed Jan. 19, 1990, which was allowed on Mar. 12, 1991.. |
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