US5009810A
Expired / Lapsed
US
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Endothermic blowing agents compositions and applications
Assignee: JM Huber Corp
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Filing: 1989-05-16
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Granted: 1991-04-23
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Expires: 2009-05-16
Abstract
Abstract 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
- 👤 Satish K. Wason
- 👤 Gerry Mooney
- 👤 Claude R. Andrews
- 👤 Michael E. Tarquini
- 👤 John A. Kosin
- 👤 Rod A. Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
61 words
An endothermic blowing agent which comprises a mixture of a polycarboxylic acid and an inorganic carbonate, wherein said polycarboxylic acid and said inorganic carbonate have been surface treated with a component selected from the group consisting of mono glycerides, stearic acid, silane coupling agents and mixtures thereof which prevents water from being absorbed by said polycarboxylic acid and said inorganic carbonate.
Claim 2
Dependent Claim
61 words
An endothermic blowing agent which comprises a mixture of a polycarboxylic acid and an inorganic carbonate, wherein said polycarboxylic acid and said inorganic carbonate have been surface treated with a component selected from the group consisting of mono glycerides, stearic acid, silane coupling agents and mixtures thereof which prevents water from being absorbed by said polycarboxylic acid and said inorganic carbonate.
Claim 3
Dependent Claim
52 words
An endothermic blowing agent according to claim 1, wherein said polycarboxylic acid is selected from the group consisting of those of the formula HOOC--R--COOH and alkali metal salts thereof, wherein R is alkylene of 1 to 8 carbon atoms which may contain one or more hydroxy substituents and may also contain unsaturation.
Claim 4
Dependent Claim
33 words
An endothermic blowing agent according to claim 2, wherein said polycarboxylic acid is citric acid, selected from the group consisting of fumaric acid, tartaric acid, sodium hydrogen citrate, monosodium citrate, and mixtures thereof.
Claim 5
Dependent Claim
21 words
An endothermic blowing agent according to claim 1, wherein said inorganic carbonate is an alkali metal or alkaline earth metal carbonate.
Claim 6
Dependent Claim
35 words
An endothermic blowing agent according to claim 1, wherein said inorganic carbonate is selected from the group consisting of sodium aluminum hydroxy carbonate, sodium bicarbonate and mixtures thereof, and said polycarboxylic acid is citric acid.
Claim 7
Dependent Claim
16 words
An endothermic blowing agent according to claim 1, wherein said surface treating component comprises glyceryl monostearate.
Claim 8
Dependent Claim
31 words
An endothermic blowing agent according to claim 1, wherein the level of surface treatment of said polycarboxylic acid and said inorganic carbonate is between about 0.1 and 10.0 percent by weight.
Claim 9
Dependent Claim
24 words
An endothermic blowing agent according to claim 7, wherein said level of surface treatment of said polycarboxylic acid is about 1.0 percent by weight.
Claim 10
Dependent Claim
24 words
An endothermic blowing agent according to claim 7, wherein said level of surface treatment of said inorganic carbonate is about 3.0 percent by weight.
Claim 11
Dependent Claim
31 words
An endothermic blowing agent according to claim 1, wherein the weight ratio of said surface treated polycarboxylic acid to said surface treated inorganic carbonate is between about 0.10 and about 99.00.
Claim 12
Dependent Claim
31 words
An endothermic blowing agent according to claim 10, wherein said weight ratio of said surface treated polycarboxylic acid to said surface treated inorganic carbonate is between about 1.00 and about 5.00.
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| 3.5 Years (Year 4) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |