Patent US4256870A successfully refreshed from Google Patents.
US4256870A
Expired / Lapsed
US
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Solventless release compositions, methods and articles of manufacture
Assignee: General Electric Co
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Filing: 1979-05-17
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Granted: 1981-03-17
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Expires: 1999-05-17
Abstract
Abstract A solventless release coating composition is provided as well as a method for rendering materials nonadherent to other materials which would normally adhere thereto. The coating composition is a platinum-metal-complex catalyzed silicone composition comprising a vinyl or silanol functional polysiloxane base polymer and a methylhydrogen crosslinking agent. Diallylmaleate is added to the composition in order to extend the useful shelf-life of the product by inhibiting any premature crosslinking reactions; the useful pot-life at ambient temperatures of the catalyzed composition can also be extended.
Inventors
- 👤 Richard P. Eckberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:31
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
130 words
A silicone composition comprising: (a) a diorganopolysiloxane base polymer having up to approximately 20% by weight alkenyl or silanol functional groups and having a viscosity ranging from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) a polymethylhydrogen siloxane fluid crosslinking agent having up to approximately 100% by weight SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effective amount of precious metal catalyst for facilitating an addition cure hydrosilation reaction between said base polymer and said crosslinking agent; and (d) an amount of dialkyl carboxylic ester containing carbon to carbon unsaturation effective to inhibit the precious metal catalyzed hydrosilation cure reaction of said silicone composition at temperatures below the heat cure temperature of said silicone composition.
Claim 2
Dependent Claim
130 words
A silicone composition comprising: (a) a diorganopolysiloxane base polymer having up to approximately 20% by weight alkenyl or silanol functional groups and having a viscosity ranging from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) a polymethylhydrogen siloxane fluid crosslinking agent having up to approximately 100% by weight SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effective amount of precious metal catalyst for facilitating an addition cure hydrosilation reaction between said base polymer and said crosslinking agent; and (d) an amount of dialkyl carboxylic ester containing carbon to carbon unsaturation effective to inhibit the precious metal catalyzed hydrosilation cure reaction of said silicone composition at temperatures below the heat cure temperature of said silicone composition.
Claim 3
Dependent Claim
37 words
A silicone composition as in claim 1, wherein the dialkyl carboxylic ester is selected from the group consisting of diallylmaleate, diallylphthalate, diallylsuccinate and dialkylesters of maleic acid selected from the group consisting of dimethylmaleate, diethylmaleate and silylmaleate.
Claim 4
Dependent Claim
158 words
A solventless coating composition for rendering a material nonadherent to normally adherent other materials comprising: (a) a vinyl chainstopped diorganopolysiloxane base polymer having the formula ##STR5## wherein R is a monovalent hydrocarbon radical free of unsaturation, R' is a hydrocarbon radical having alkenyl unsaturation, X and Y are positive integers so that the vinyl chainstopped diorganopolysiloxane has from approximately 0% to approximately 20% by weight R' groups, and having a viscosity ranging from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) a trimethyl chainstopped polymethylhydrogen siloxane fluid crosslinking agent having from approximately 10% to approximately 100% by weight SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effective amount of platinum catalyst for facilitating heat curing of said composition; and (d) an amount of diallylmaleate effective to inhibit the cure of said coating composition at temperatures below the heat cure temperature of said composition.
Claim 5
Dependent Claim
158 words
A solventless coating composition for rendering a material nonadherent to normally adherent other materials comprising: (a) a vinyl chainstopped diorganopolysiloxane base polymer having the formula ##STR5## wherein R is a monovalent hydrocarbon radical free of unsaturation, R' is a hydrocarbon radical having alkenyl unsaturation, X and Y are positive integers so that the vinyl chainstopped diorganopolysiloxane has from approximately 0% to approximately 20% by weight R' groups, and having a viscosity ranging from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) a trimethyl chainstopped polymethylhydrogen siloxane fluid crosslinking agent having from approximately 10% to approximately 100% by weight SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effective amount of platinum catalyst for facilitating heat curing of said composition; and (d) an amount of diallylmaleate effective to inhibit the cure of said coating composition at temperatures below the heat cure temperature of said composition.
Claim 6
Dependent Claim
16 words
A coating composition as in claim 3, wherein said vinyl chainstopped diorganopolysiloxane has the formula ##STR6##
Claim 7
Dependent Claim
19 words
A coating composition as in claim 3, wherein the amount of catalyst is approximately 10 to approximately 500 ppm.
Claim 8
Dependent Claim
21 words
A coating composition as in claim 3, wherein the amount of diallylmaleate ranges from approximately 0.1% to approximately 0.5% by weight.
Claim 9
Dependent Claim
21 words
An article of manufacture comprising a base element bearing a heat-cured coating of the composition of claims 1, 2 or 3.
Claim 10
Dependent Claim
44 words
An aritlce of manufacture comprising a base element formed of a material selected from the group consisting of metal foil, glass, plastic and fibrous materials and having a surface portion coated with a heat-cured quantity of the composition of claims 1, 2 or 3.
Claim 11
Dependent Claim
16 words
An article of manufacture comprising paper coated with the composition of claims 1, 2 or 3.
Claim 12
Independent Claim
150 words
A method for rendering a material nonadherent to normally adherent other materials comprising applying to the first said material an amount of solventless composition comprising: (a) a diorganopolysiloxane base polymer having up to approximately 20% by weight alkenyl or silanol functional groups and having a viscosity ranging from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) a polymethylhydrogensiloxane fluid crosslinking agent having up to approximately 100% by weight SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effective amount of precious metal catalyst for facilitating an addition cure hydrosilation reaction between said base polymer and said crosslinking agent; and (d) an amount of dialkyl carboxylic ester containing carbon to carbon unsaturation effective to inhibit the precious metal catalyzed hydrosilation cure reaction of said silicone composition at temperatures below the heat cure temperature of said silicone composition.
Claim 13
Independent Claim
150 words
A method for rendering a material nonadherent to normally adherent other materials comprising applying to the first said material an amount of solventless composition comprising: (a) a diorganopolysiloxane base polymer having up to approximately 20% by weight alkenyl or silanol functional groups and having a viscosity ranging from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) a polymethylhydrogensiloxane fluid crosslinking agent having up to approximately 100% by weight SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effective amount of precious metal catalyst for facilitating an addition cure hydrosilation reaction between said base polymer and said crosslinking agent; and (d) an amount of dialkyl carboxylic ester containing carbon to carbon unsaturation effective to inhibit the precious metal catalyzed hydrosilation cure reaction of said silicone composition at temperatures below the heat cure temperature of said silicone composition.
Claim 14
Dependent Claim
36 words
A method as in claim 10, wherein the dialkyl carboxylic ester is selected from the groups consisting of diallylmaleate, diallylphthalate, diallylsuccinate and dialkylesters of maleic acid selected from the group consisting of dimethylmaleate, diethylmaleate and silylmaleate.
Claim 15
Independent Claim
169 words
A method for rendering a material nonadherent to normally adherent other materials comprising applying to the first said material an amount of a solventless composition comprising: (a) a vinyl chainstopped diorganopolysiloxane base polymer having the formula ##STR7## where R is a monovalent hydrocarbon radical free of unsaturation, R' is a hydrocarbon radical having alkenyl unsaturation, X and Y are positive integers so that the vinyl chain-stopped diorganopolysiloxane has from approximately 0% to approximately 20% by weight of R' groups and the viscosity of the polysiloxane ranges from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) trimethyl chainstopped polymethylhydrogen siloxane fluid crosslinking agent having from approximately 10% to approximately 100% SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effetive amount of platinum catlyst for facilitating heat curing of said composition; and (d) an amount of diallylmaleate effective to inhibit the cure of said coating composition at temperatures below the heat cure temperature of said composition.
Claim 16
Independent Claim
169 words
A method for rendering a material nonadherent to normally adherent other materials comprising applying to the first said material an amount of a solventless composition comprising: (a) a vinyl chainstopped diorganopolysiloxane base polymer having the formula ##STR7## where R is a monovalent hydrocarbon radical free of unsaturation, R' is a hydrocarbon radical having alkenyl unsaturation, X and Y are positive integers so that the vinyl chain-stopped diorganopolysiloxane has from approximately 0% to approximately 20% by weight of R' groups and the viscosity of the polysiloxane ranges from approximately 50 to approximately 100,000 centipoise at 25° C.; (b) trimethyl chainstopped polymethylhydrogen siloxane fluid crosslinking agent having from approximately 10% to approximately 100% SiH groups and having a viscosity in the range of approximately 25 to approximately 1000 centipoise at 25° C.; (c) an effetive amount of platinum catlyst for facilitating heat curing of said composition; and (d) an amount of diallylmaleate effective to inhibit the cure of said coating composition at temperatures below the heat cure temperature of said composition.
Claim 17
Dependent Claim
21 words
A method as in claim 12, wherein said vinyl chain-stopped diorganopolysiloxane base polymer in the applied composition has the formula ##STR8##
Claim 18
Dependent Claim
22 words
A method as in claim 12, wherein the amount of catalyst in the applied composition is approximately 10 to approximately 500 ppm.
Claim 19
Dependent Claim
24 words
A method as in claim 12, wherein the amount of diallylmaleate in the applied composition ranges from approximately 0.1% to approximately 0.5% by weight.
Claim 20
Independent Claim
28 words
A method wherein the composition of claims 1 or 2 is applied to a material selected from the group consisting of metal foil, glass, plastic and fibrous material.
Claim 21
Dependent Claim
28 words
A method as in claim 12, wherein the solventless composition is applied to a material selected from the group consisting of metal foil, glass, plastic and fibrous materials.
Claim 22
Dependent Claim
12 words
A method as in claim 12, wherein said fibrous material is paper.
Claim 23
Dependent Claim
11 words
A method as in claim 10, wherein the silylmaleate is bis-γ-propyltris(methoxy)silylmaleate.
Claim 24
Dependent Claim
12 words
A silicone composition as in claim 2, wherein the silylmaleate is bis-γ-propyltris(methoxy)silylmaleate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |