US5223344A
Expired / Lapsed
US
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Heat curable platinum catalyzed silicone coating compositions
Assignee: General Electric Co
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Filing: 1991-12-20
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Granted: 1993-06-29
•
Expires: 2011-12-20
Abstract
Abstract The present invention discloses the use of certain silicon hydrides having at least two hydrogen atoms attached to silicon in particular heat curable platinum catalyzed silicone coating formulations, which permits the use of a reduced level of inhibitor and improved cure performance.
Inventors
- 👤 Chris A. Sumpter
- 👤 Larry N. Lewis
- 👤 Judith Stein
- 👤 James V. Crivello
- 👤 Mingxin Fan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:07
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C09; C09D; C09D183/00; C09D183/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20; C08G77/80; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
59 words
A heat curable silicone composition having extended pot life at low temperatures and rapid curing at elevated temperatures comprising: (a) a vinyl containing polydiorganosilicone fluid; (b) a silicone hydride containing polydiorganosilicone; (c) a platinum group metal catalyst; and (d) an effective cure accelerating amount of a silane additive having at least two hydrogen atoms bonded to the silicon atom.
Claim 2
Dependent Claim
59 words
A heat curable silicone composition having extended pot life at low temperatures and rapid curing at elevated temperatures comprising: (a) a vinyl containing polydiorganosilicone fluid; (b) a silicone hydride containing polydiorganosilicone; (c) a platinum group metal catalyst; and (d) an effective cure accelerating amount of a silane additive having at least two hydrogen atoms bonded to the silicon atom.
Claim 3
Dependent Claim
106 words
A heat curable silicone composition as defined in claim 1 wherein said vinyl containing polydiorganosilicone fluid (a) comprises compounds having the general formulae: M.sup.vi D.sub.x M.sup.vi or M.sup.vi D.sub.x D.sub.y M.sup.vi wherein M vi comprises ##STR5## units, D x comprises ##STR6## units, D y comprises ##STR7## units, and wherein R is, independently, a monovalent hydrocarbon radical free of unsaturation having up to about 8 carbon atoms, R 1 is a hydrocarbon radical having alkenyl unsaturation of from 2 to 20 carbon atoms, and m and n are positive integers such that said vinyl containing silicone fluid has up to about 20% by weight R 1 groups.
Claim 4
Dependent Claim
23 words
A heat curable silicone composition as defined in claim 1 wherein said vinyl containing polydiorganosilicone fluid (a) is a vinyl containing polydimethylorganosilicone fluid.
Claim 5
Dependent Claim
39 words
A heat curable silicone composition as defined in claim 1 wherein said vinyl containing polydiorganosilicone fluid (a) is present in an amount ranging from 50 to 99 parts by weight based on the total weight of the silicone composition.
Claim 6
Dependent Claim
41 words
A heat curable silicone composition as defined in claim 1 wherein said silicone hydride containing polydiorganosilicone (b) is present in an amount ranging from about 0.5 to about 30 percent by weight based on the total weight of the silicone composition.
Claim 7
Dependent Claim
25 words
A heat curable silicone composition as defined in claim 1 wherein said platinum group metal catalyst (c) comprises a platinum-siloxane complex of tetramethyltetravinylcyclotetrasiloxane with platinum.
Claim 8
Dependent Claim
24 words
A heat curable silicone composition as defined in claim 1 wherein said platinum group metal catalyst (c) is a complex of 1,3-divinyltetramethyldisiloxane with platinum.
Claim 9
Dependent Claim
43 words
A heat curable silicone composition as defined in claim 1 wherein said platinum group metal catalyst (c) is present in an amount ranging from about 5 to about 200 parts per million by weight of platinum per mole of silane in said composition.
Claim 10
Dependent Claim
48 words
A heat curable silicone composition as defined in claim 1 wherein said silane additive (d) comprises compounds having the general formula R 2 2 SiH 2 or R 2 SiH 3 where R 2 is selected from the group consisting of alkyl radicals, cycloalkyl radicals and phenyl radicals.
Claim 11
Dependent Claim
29 words
A heat curable silicone composition as defined in claim 9 wherein said silane additive (d) is selected from the group consisting of diphenylsilane, dioctylsilane, methyldecylsilane, phenylsilane, phenylmethylsilane and didecylsilane.
Claim 12
Dependent Claim
17 words
A heat curable silicone composition as defined in claim 10 wherein said silane additive (d) is diphenylsilane.
Claim 13
Dependent Claim
26 words
A heat curable silicone composition as defined in claim 10 wherein said silane additive (d) is selected from the group consisting of phenylsilane, octylsilane and decylsilane.
Claim 14
Dependent Claim
17 words
A heat curable silicone composition as defined in claim 12 wherein said silane additive (d) is phenylsilane.
Claim 15
Dependent Claim
39 words
A heat curable silicone composition as defined in claim 1 wherein said silane additive (d) is present in an amount ranging from about 5 to about 200 parts per million based on the total weight of the silane composition.
Claim 16
Dependent Claim
42 words
A heat curable silicone composition as defined in claim 1 further comprising (e) an inhibiting agent effective to prevent premature cure of a one-package composition and to extend the shelf-life of a stored composition and the pot-life of a composition in use.
Claim 17
Dependent Claim
36 words
A heat curable silicone composition as defined in claim 15 wherein said inhibiting agent (e) is selected from the group consisting of dialkenylmaleates, dialkylmaleates, acetylenic alcohols, amines, isocyanurates, ene-ynes, vinyl acetates, acetylene dicarboxylates and mixtures thereof.
Claim 18
Dependent Claim
30 words
A heat curable silicone composition as defined in claim 16 wherein said inhibiting agent (e) is selected from the group consisting of diallylmaleate, dimethylmaleate, 4-butyne-1-ol, tetramethyl ethylenediamine and mixtures thereof.
Claim 19
Dependent Claim
39 words
A heat curable silicone composition as defined in claim 15 wherein said inhibiting agent (e) is present in an amount ranging from about 0.05 to about 0.5 percent by weight based on the total weight of the silicone composition.
Claim 20
Dependent Claim
49 words
A liquid injection moldable heat curable silicone composition having extended pot life at low temperatures and rapid curing at elevated temperatures with a low viscosity in the uncured state and a high physical strength in the cured state comprising the heat curable silicone composition as defined in claim 1.
Claim 21
Independent Claim
53 words
A method for preparing a heat curable silicone composition comprising mixing (a) a vinyl containing polydiorganosilicone fluid; (b) a silicone hydride containing polydiorganosilicone; (c) a platinum group metal catalyst; and (d) an effective cure accelerating amount of a silane additive which comprises silicon bound to greater than or equal to two hydrogen atoms.
Claim 22
Independent Claim
53 words
A method for preparing a heat curable silicone composition comprising mixing (a) a vinyl containing polydiorganosilicone fluid; (b) a silicone hydride containing polydiorganosilicone; (c) a platinum group metal catalyst; and (d) an effective cure accelerating amount of a silane additive which comprises silicon bound to greater than or equal to two hydrogen atoms.
Claim 23
Dependent Claim
103 words
A method as defined in claim 20 wherein said vinyl containing polydiorganosilicone fluid (a) comprises compounds having the general formulae: M.sup.vi D.sub.x M.sup.vi or M.sup.vi D.sub.x D.sub.y M.sup.vi wherein M vi comprises ##STR8## units, D x comprises ##STR9## units, D y comprises ##STR10## units, and wherein R is, independently, a monovalent hydrocarbon radical free of unsaturation having up to about 8 carbon atoms, R 1 is a hydrocarbon radical having alkenyl unsaturation of from 2 to 20 carbon atoms, and m and n are positive integers such that said vinyl containing silicone fluid has up to about 20% by weight R 1 groups.
Claim 24
Dependent Claim
20 words
A method as defined in claim 21 wherein said vinyl containing polydiorganosilicone fluid (a) is a vinyl containing polydimethylorganosilicone fluid.
Claim 25
Dependent Claim
37 words
A method as defined in claim 20 wherein said vinyl containing polydiorganosilicone (a) is added in an amount ranging from about 50 to about 99 parts by weight based on the total weight of the silicone composition.
Claim 26
Dependent Claim
38 words
A method as defined in claim 20 wherein said silicone hydride containing polydiorganosilicone (b) is present in an amount ranging from about 0.5 to about 30 percent by weight based on the total weight of the silicone composition.
Claim 27
Dependent Claim
22 words
A method as defined in claim 20 wherein said platinum group metal catalyst (c) comprises a platinum-siloxane complex of tetramethyltetravinylcyclotetrasiloxane with platinum.
Claim 28
Dependent Claim
21 words
A method as defined in claim 20 wherein said platinum group metal catalyst (c) is a complex of 1,3-divinyltetramethyldisiloxane with platinum.
Claim 29
Dependent Claim
37 words
A method as defined in claim 20 wherein said platinum group metal catalyst (c) is present in amount ranging from about 5 to about 200 parts per million based on the total weight of the silicone composition.
Claim 30
Dependent Claim
45 words
A method as defined in claim 20 wherein said silane additive (d) comprises compounds having the general formula R 2 2 SiH 2 or R 2 SiH 3 where R 2 is selected from the group consisting of alkyl radicals, cycloalkyl radicals and phenyl radicals.
Claim 31
Dependent Claim
26 words
A method as defined in claim 28 wherein said silane additive (d) is selected from the group consisting of diphenylsilane, dioctylsilane, methyldecylsilane, phenylsilane, phenylmethylsilane and didecylsilane.
Claim 32
Dependent Claim
14 words
A method as defined in claim 29 wherein said silane additive (d) is diphenylsilane.
Claim 33
Dependent Claim
22 words
A method as defined in claim 28 wherein said silane additive is selected from the group consisting of phenylsilane, octylsilane and decylsilane.
Claim 34
Dependent Claim
13 words
A method as defined in claim 31 wherein said silane additive is phenylsilane.
Claim 35
Dependent Claim
36 words
A method as defined in claim 20 wherein said silane additive (d) is present in an amount ranging from about 5 to about 200 parts per million based on the total weight of the silicone composition.
Claim 36
Dependent Claim
39 words
A method as defined in claim 20 further comprising (e) an inhibiting agent effective to prevent premature cure in a one-package composition and to extend the shelf-life of a stored composition and the pot-life of a composition in use.
Claim 37
Dependent Claim
33 words
A method as defined in claim 34 wherein said inhibiting agent (e) is selected from the group consisting of dialkenylmaleates, dialkylmaleates, acetylenic alcohols, amines, isocyanurates, ene-ynes, vinyl acetates, aectylene dicarboxylates and mixtures thereof.
Claim 38
Dependent Claim
27 words
A method as defined in claim 35 wherein said inhibiting agent (e) is selected from the group consisting of diallylmaleate, dimethylmaleate, 4-butyne-1-ol, tetramethyl ethylenediamine and mixtures thereof.
Claim 39
Dependent Claim
36 words
A method as defined in claim 34 wherein said inhibiting agent (e) is present in an amount ranging from about 0.05 to about 0.5 percent by weight based on the total weight of the silicone composition.
Claim 40
Dependent Claim
18 words
A coated article comprising a substrate coated with the heat curable silicone composition as defined in claim 1.
Claim 41
Dependent Claim
32 words
A coated article as defined in claim 38 wherein said substrate is selected from the group consisting of paper, polyethylene coated kraft (PEK) paper, super-calendered kraft paper, polyethylene films and polypropylene films.
Claim 42
Independent Claim
77 words
A method for forming a coated article comprising (i) mixing (a) a vinyl containing polydiorganosilicone fluid, (b) a silicone hydride containing polydiorganosilicone, (c) a platinum group metal catalyst, and (d) a silane cure accelerating additive which comprises a silicon bound to greater than or equal to two hydrogen atoms; (ii) coating a substrate with the mixture formed in step (a); and (iii) curing the coated substrate by heating to a temperature of less than about 150° C.
Claim 43
Independent Claim
77 words
A method for forming a coated article comprising (i) mixing (a) a vinyl containing polydiorganosilicone fluid, (b) a silicone hydride containing polydiorganosilicone, (c) a platinum group metal catalyst, and (d) a silane cure accelerating additive which comprises a silicon bound to greater than or equal to two hydrogen atoms; (ii) coating a substrate with the mixture formed in step (a); and (iii) curing the coated substrate by heating to a temperature of less than about 150° C.
Claim 44
Dependent Claim
41 words
A method as defined in claim 40 wherein step (i) further comprises mixing (e) an inhibiting agent effective to prevent premature cure of the mixture and to extend the shelf-life of stored mixture and the pot-life of the mixture in use.
Claim 45
Dependent Claim
17 words
A method as defined in claim 40 wherein said curing temperature is less than about 125° C.
Claim 46
Dependent Claim
17 words
A method as defined in claim 42 wherein said curing temperature is less than about 110° C.
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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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |