Claims
- 1. A curable silicone coating composition comprising:
- (A) an organosilicon compound having at least two olefinic hydrocarbon radicals per compound;
- (B) at least one organohydrogensilicon compound;
- (C) a platinum group metal-containing catalyst; and
- (D) a silicone resin prepared by the process of:
- (I) mixing in a continuous manner a silane selected from the group consisting of:
- (a) a silane having the formula SiX.sub.4 wherein X is a halogen atom or a group having the formula OR wherein R is a group selected from the group consisting of alkyl groups having from 1 to 6 carbon atoms, aryl groups, and arylalkyl groups;
- (b) alcohol treated halogenated silanes; and
- (c) alkyl silicates having units of the formula ##STR4## or a partial hydrolysis condensate thereof, wherein R.sup.1 is a group selected from the group consisting of alkyl groups having from 1 to 6 carbon atoms, aryl groups, and arylalkyl groups, and d has a value of from 1 to 3, with a condensation catalyst;
- (II) adding a quenching agent to the reaction mixture of (I), whereby an aqueous layer or condensation catalyst layer and an organic-silicone resin containing layer are formed;
- (III) separating the aqueous layer or condensation catalyst layer from the organic-silicone resin containing layer; and
- (IV) stripping the organic-silicone resin containing layer, wherein the weight ratio of said silane to said condensation catalyst is constant throughout said process.
- 2. A composition according to claim 1, wherein (A) is selected from the group consisting of ViMe.sub.2 SiO(Me.sub.2 SiO).sub.a SiMe.sub.2 Vi, HexMe.sub.2 SiO(Me.sub.2 SiO).sub.a SiMe.sub.2 Hex, Vi.sub.2 MeSiO(Me.sub.2 SiO).sub.a SiMeVi.sub.2, Hex.sub.2 MeSiO(Me.sub.2 SiO).sub.a SiMeHex.sub.2, Vi.sub.3 SiO(Me.sub.2 SiO).sub.a SiVi.sub.3, Hex.sub.3 SiO(Me.sub.2 SiO).sub.a SiHex.sub.3, PhMeViSiO(Me.sub.2 SiO).sub.a SiPhMeVi, HexMe.sub.2 SiO(Me.sub.2 SiO).sub.a (MeHexSiO).sub.b SiMe.sub.2 Hex, ViMe.sub.2 SiO(Me.sub.2 SiO).sub.a (MeViSiO).sub.b SiMe.sub.2 Vi, Hex.sub.2 MeSiO(Me.sub.2 SiO).sub.a (MeHexSiO).sub.b SiMeHex.sub.2, Vi.sub.2 MeSiO(Me.sub.2 SiO).sub.a (MeViSiO).sub.b SiMeVi.sub.2, Hex.sub.3 SiO(Me.sub.2 SiO).sub.a (MeHexSiO).sub.b SiHex.sub.3, and Vi.sub.3 SiO(Me.sub.2 SiO).sub.a (MeViSiO).sub.b SiVi.sub.3, wherein Me, Vi, Hex, and Ph denote methyl, vinyl, 5-hexenyl and phenyl, respectively and a has a value of from 0 to 1000, and b has a value of from 0 to 100.
- 3. A composition according to claim 21, wherein (B) is selected from the group consisting of bis(trimethylsiloxy)dimethyldihydrogendisiloxane, heptamethylhydrogentrisiloxane, hexamethyldihydrogentrisiloxane, methylhydrogencyclosiloxanes, pentamethylpentahydrogencyclopentasiloxane, pentamethylhydrogendisiloxane, polymethylhydrogensiloxanes, tetramethyltetrahydrogencyclotetrasiloxane, tetramethyldihydrogendisiloxane, and methylhydrogendimethylsiloxane copolymers.
- 4. A composition according to claim 1, wherein (C) is selected from chloroplatinic acid or chloroplatinic acid-divinyltetramethyldisiloxane complexes.
- 5. A composition according to claim 1, wherein (a) is selected from the group consisting of tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane.
- 6. A composition according to claim 1, wherein the halogenated silane of (b) is selected from the group consisting of trimethylchlorosilane, triethylchlorosilane, trimethylbromosilane, triethylbromosilane, trimethylfluorosilane, triethylfluorosilane, dimethylvinylchlorosilane, and dimethyl-5-hexenylchlorosilane.
- 7. A composition according to claim 1, wherein the alcohol of (b) is selected from the group consisting of ethanol, methanol, and isopropanol.
- 8. A composition according to claim 1, wherein (c) is ethylpolysilicate.
- 9. A composition according to claim 1, wherein the condensation catalyst is selected from the group consisting of hydrochloric acid, sulfuric acid, and sulfonic acids.
- 10. A composition according to claim 1, wherein the quenching agent is a silane having the formula R.sup.5 R.sup.6 R.sup.7 SiZ wherein R.sup.5, R.sup.6 and R.sup.7 are selected from hydrogen, alkyl groups having from 1 to 12 carbon atoms, alkenyl groups having from 2 to 12 carbon atoms, aryl groups, arylalkyl groups, or perfluoroalkylethyl groups having the formula C.sub.n F.sub.2n+1 CH.sub.2 CH.sub.2 where n is 1 to 6, and Z is a halogen atom or is a group having the formula OR.sup.8 wherein R.sup.8 is a group selected from the group consisting of alkyl groups having from 1 to 6 carbon atoms, aryl groups, and arylalkyl groups.
- 11. A composition according to claim 1, wherein the quenching agent is a disiloxane selected from the group consisting of tetramethyldisiloxane, hexamethyldisiloxane, tetramethyldivinylsiloxane, tetramethyldi-5-hexenylsiloxane, tetramethyl-3,3,3-trifluoropropyldisiloxane, tetramethyldiethylsiloxane, tetramethyldiphenyldisiloxane, and diethyldiphenyldivinyldisiloxane.
- 12. A composition according to claim 1, wherein the quenching agent further comprises an organic solvent.
- 13. A composition according to claim 12, wherein the organic solvent is selected from the group consisting of heptane and xylene.
- 14. A composition according to claim 1, wherein the composition further comprises an inhibitor which inhibits the catalytic activity of the platinum group metal containing catalyst.
- 15. A composition according to claim 14, wherein the inhibitor is selected from the group consisting of maleates and fumarates.
- 16. A composition according to claim 14, wherein the composition further comprises a bath life extender compound.
- 17. A composition according to claim 16, wherein the bath life extender compound is a compound selected from the group consisting of compounds which contain one or more primary or secondary alcohol groups, carboxylic acids, cyclic ethers, and water.
- 18. A composition according to claim 1, wherein the composition further comprises a diluent.
- 19. A curable silicone coating composition comprising:
- (A) an organosilicon compound having at least two olefinic hydrocarbon radicals per compound;
- (B) at least one organohydrogensilicon compound;
- (C) a platinum group metal-containing catalyst; and
- (D) a silicone resin prepared by the process of:
- (I) mixing in a continuous manner a silane selected from the group consisting of:
- (i) alkoxysilanes,
- (ii) halogenated silanes, and
- (iii) alkyl silicates with a silicon compound selected from the group consisting of:
- (iv) trialkylhalosilanes and
- (v) disiloxanes;
- (II) adding an alcohol to the mixture of (I);
- (III) adding water or a mixture of water and a condensation catalyst to the mixture of (II) whereby an aqueous layer and an organic-silicone resin containing layer are formed;
- (IV) separating the aqueous layer from the organic-silicone resin containing layer;
- (V) stripping the organic-silicone resin containing layer; wherein the weight ratio of said silane to said water or to said mixture of water and condensation catalyst is constant throughout said process.
- 20. A composition according to claim 19, wherein (A) is selected from the group consisting of ViMe.sub.2 SiO(Me.sub.2 SiO).sub.a SiMe.sub.2 Vi, HexMe.sub.2 SiO(Me.sub.2 SiO).sub.a SiMe.sub.2 Hex, Vi.sub.2 MeSiO(Me.sub.2 SiO).sub.a SiMeVi.sub.2, Hex.sub.2 MeSiO(Me.sub.2 SiO).sub.a SiMeHex.sub.2, Vi.sub.3 SiO(Me.sub.2 SiO).sub.a SiVi.sub.3, Hex.sub.3 SiO(Me.sub.2 SiO).sub.a SiHex.sub.3, PhMeViSiO(Me.sub.2 SiO).sub.a SiPhMeVi, HexMe.sub.2 SiO(Me.sub.2 SiO).sub.a (MeHexSiO).sub.b SiMe.sub.2 Hex, ViMe.sub.2 SiO(Me.sub.2 SiO).sub.a (MeViSiO).sub.b SiMe.sub.2 Vi, Hex.sub.2 MeSiO(Me.sub.2 SiO).sub.a (MeHexSiO).sub.b SiMeHex.sub.2, Vi.sub.2 MeSiO(Me.sub.2 SiO).sub.a (MeViSiO).sub.b SiMeVi.sub.2, Hex.sub.3 SiO(Me.sub.2 SiO).sub.a (MeHexSiO).sub.b SiHex.sub.3, and Vi.sub.3 SiO(Me.sub.2 SiO).sub.a (MeViSiO).sub.b SiVi.sub.3, wherein Me, Vi, Hex, and Ph denote methyl, vinyl, 5-hexenyl and phenyl, respectively and a has a value of from 0 to 1000, and b has a value of from 0 to 100.
- 21. A composition according to claim 19, wherein (B) is selected from the group consisting of bis(trimethylsiloxy)dimethyldihydrogendisiloxane, heptamethylhydrogentrisiloxane, hexamethyldihydrogentrisiloxane, methylhydrogencyclosiloxanes, pentamethylpentahydrogencyclopentasiloxane, pentamethylhydrogendisiloxane, polymethylhydrogensiloxanes, tetramethyltetrahydrogencyclotetrasiloxane, tetramethyldihydrogendisiloxane, and methylhydrogendimethylsiloxane copolymers.
- 22. A composition according to claim 19, wherein (C) is selected from chloroplatinic acid or chloroplatinic acid-divinyltetramethyldisiloxane complexes.
- 23. A composition according to claim 19, wherein (i) is selected from the group consisting of tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane.
- 24. A composition according to claim 19, wherein (ii) is tetrachlorosilane.
- 25. A composition according to claim 19, wherein (iii) is ethylpolysilicate.
- 26. A composition according to claim 19, wherein (iv) is selected from the group consisting of trimethylchlorosilane, triethylchlorosilane, trimethylbromosilane, triethylbromosilane, trimethylfluorosilane, triethylfluorosilane, dimethylvinylchlorosilane, and dimethyl-5-hexenylchlorosilane.
- 27. A composition according to claim 19, wherein (v) is selected from the group consisting of tetramethyldisiloxane, hexamethyldisiloxane, tetramethyldivinylsiloxane, tetramethyldi-5-hexenylsiloxane, tetramethyl-3,3,3-trifluoropropyldisiloxane, tetramethyldiethylsiloxane, tetramethyldiphenyldisiloxane, and diethyldiphenyldivinyldisiloxane.
- 28. A composition according to claim 19, wherein the alcohol is selected from the group consisting of ethanol, methanol, and isopropanol.
- 29. A composition according to claim 19, wherein the condensation catalyst is selected from the group consisting of hydrochloric acid, sulfuric acid, and sulfonic acids.
- 30. A composition according to claim 19, further comprising heating the mixture after step (III).
- 31. A composition according to claim 19, wherein the composition further comprises an inhibitor which inhibits the catalytic activity of the platinum group metal containing catalyst.
- 32. A composition according to claim 31, wherein the composition further comprises a bath life extender compound.
- 33. A composition according to claim 19, wherein the composition further comprises a diluent.
- 34. A process for preparing a laminate of a substrate and an adhesive wherein the adhesive will release from the substrate, the process comprising the steps of:
- (I) coating a curable silicone coating composition on the surface of the substrate wherein the composition comprises:
- (A) an organosilicon compound having at least two olefinic hydrocarbon radicals per compound;
- (B) at least one organohydrogensilicon compound;
- (C) a platinum group metal-containing catalyst; and
- (D) a silicone resin prepared by the process of:
- (I) mixing in a continuous manner a silane selected from the group consisting of:
- (a) a silane having the formula SiX.sub.4 wherein X is a halogen atom or a group having the formula OR wherein R is a group selected from the group consisting of alkyl groups having from 1 to 6 carbon atoms, aryl groups, and arylalkyl groups;
- (b) alcohol treated halogenated silanes; and
- (c) alkyl silicates having units of the formula ##STR5## or a partial hydrolysis condensate thereof, wherein R.sup.1 is a group selected from the group consisting of alkyl groups having from 1 to 6 carbon atoms, aryl groups, and arylalkyl groups, and d has a value of from 1 to 3, with a condensation catalyst;
- (II) adding a quenching agent to the reaction mixture of (I), whereby an aqueous layer or condensation catalyst layer and an organic-silicone resin containing layer are formed;
- (III) separating the aqueous layer or condensation catalyst layer from the organic-silicone resin containing layer; and
- (IV) stripping the organic-silicone resin containing layer, wherein the weight ratio of said silane to said condensation catalyst is constant throughout said process;
- (II) exposing the coating and the substrate to an energy source selected from the group consisting of (i) heat and (ii) actinic radiation in an amount sufficient to cure the coating; and
- (III) applying a pressure sensitive adhesive on the coating.
- 35. A process for preparing a laminate of a substrate and an adhesive wherein the adhesive will release from the substrate, the process comprising the steps of:
- (I) coating a curable silicone coating composition on the surface of the substrate wherein the composition comprises:
- (A) an organosilicon compound having at least two olefinic hydrocarbon radicals per compound;
- (B) at least one organohydrogensilicon compound;
- (C) a platinum group metal-containing catalyst; and
- (D) a silicone resin prepared by the process of:
- (I) mixing in a continuous manner a silane selected from the group consisting of:
- (i) alkoxysilanes,
- (ii) halogenated silanes, and
- (iii) alkyl silicates with a silicon compound selected from the group consisting of:
- (iv) trialkylhalosilanes and
- (v) disiloxanes;
- (II) adding an alcohol to the mixture of (I);
- (III) adding water or a mixture of water and a condensation catalyst to the mixture of (II) whereby an aqueous layer and an organic-silicone resin containing layer are formed;
- (IV) separating the aqueous layer from the organic-silicone resin containing layer;
- (V) stripping the organic-silicone resin containing layer; wherein the weight ratio of said silane to said water or to said mixture of water and condensation catalyst is constant throughout said process;
- (II) exposing the coating and the substrate to an energy source selected from the group consisting of (i) heat and (ii) actinic radiation in an amount sufficient to cure the coating; and
- (III) applying a pressure sensitive adhesive on the coating.
Parent Case Info
This is a continuation-in-part of application Ser. No. 08/175,830, filed on Dec. 30, 1993, U.S. Pat. No. 5,391,673.
US Referenced Citations (17)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0108208 |
Aug 1983 |
EPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
175830 |
Dec 1993 |
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