US4070343A
Expired / Lapsed
US
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Heat stable organopolysiloxane composition
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1976-11-05
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Granted: 1978-01-24
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Expires: 1996-11-05
Abstract
Abstract A reaction product of an alkali metal siloxanolate having at least three organosiloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride and an organic carboxylic acid salt or alkoxy compound of zirconium, titanium or iron are added to organosiloxane polymers to improve the heat-stability of the polymer.
Inventors
- 👤 Keiichi Kishimoto
- 👤 Yoshinobu Koda
- 👤 Shosaku Sasaki
- 👤 Masahiko Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; C08K5/5406; C08K5/04; C08K5/05; C08K5/057; C08K5/09; C08K5/098; C08L; C08L83/00; C08L83/04; C08L83/08; C08G; C08G77/00; C08G77/48; C08G77/58
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
A composition consisting of an organopolysiloxane composition having incorporated therein as a heat-stability additive a mixture of (1) a reaction product of an alkali metal siloxanolate having an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride and (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium and iron wherein the mole ratio of component (2) to cerium present in the composition is from 0.5/1 to 2.0/1.
Claim 2
Dependent Claim
92 words
A composition consisting of an organopolysiloxane composition having incorporated therein as a heat-stability additive a mixture of (1) a reaction product of an alkali metal siloxanolate having an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride and (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium and iron wherein the mole ratio of component (2) to cerium present in the composition is from 0.5/1 to 2.0/1.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the organopolysiloxane composition is a liquid organopolysiloxane.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein the organopolysiloxane is a room temperature vulcanizing silicone rubber stock or a heat vulcanizing silicone rubber stock.
Claim 5
Dependent Claim
24 words
The composition of claim 1 wherein component (1) is present in an amount of 0.5 to 5 percent by weight of the total composition.
Claim 6
Dependent Claim
119 words
A composition consisting of an organopolysiloxane composition having incorporated therein as a heat-stability additive a heat stabilizing amount of (1) a reaction product of an alkali metal siloxanolate having an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride such that there is from 0.01 to 0.1 percent by weight of cerium present in the total composition and (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium and iron wherein component (2) is present in amounts such that the mole ratio of component (2) to cerium in the composition is from 0.5/1 to 2.0/1.
Claim 7
Dependent Claim
119 words
A composition consisting of an organopolysiloxane composition having incorporated therein as a heat-stability additive a heat stabilizing amount of (1) a reaction product of an alkali metal siloxanolate having an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride such that there is from 0.01 to 0.1 percent by weight of cerium present in the total composition and (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium and iron wherein component (2) is present in amounts such that the mole ratio of component (2) to cerium in the composition is from 0.5/1 to 2.0/1.
Claim 8
Dependent Claim
80 words
A composition consisting essentially of (1) a reaction product of an alkali metal siloxanolate containing an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride acid (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium, and iron wherein the mole ratio of component (2) to cerium present in the composition is from 0.5/1 to 2.0/1.
Claim 9
Dependent Claim
80 words
A composition consisting essentially of (1) a reaction product of an alkali metal siloxanolate containing an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride acid (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium, and iron wherein the mole ratio of component (2) to cerium present in the composition is from 0.5/1 to 2.0/1.
Claim 10
Dependent Claim
105 words
A composition consisting essentially of (1) a reaction product of an alkali metal siloxanolate containing an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride such that there is from 0.5 to 5 percent by weight of cerium present in the reaction product and (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium and iron wherein component (2) is present in amounts such that the mole ratio of component (2) to cerium in the composition is from 0.5/1 to 2.0/1.
Claim 11
Dependent Claim
105 words
A composition consisting essentially of (1) a reaction product of an alkali metal siloxanolate containing an average of at least three siloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride such that there is from 0.5 to 5 percent by weight of cerium present in the reaction product and (2) at least one metal compound selected from the group consisting of organic carboxylic acid salts and alkoxy compounds of zirconium, titanium and iron wherein component (2) is present in amounts such that the mole ratio of component (2) to cerium in the composition is from 0.5/1 to 2.0/1.
References Cited (Backward Citations)
US2759904A
Cited
US3884950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |