Curable silicone coatings containing silicone resins

Claim 2

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 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 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.

Claim 3

A composition according to claim 1, wherein (A) is selected from the group consisting of ViMe 2 SiO(Me 2 SiO) a SiMe 2 Vi, HexMe 2 SiO(Me 2 SiO) a SiMe 2 Hex, Vi 2 MeSiO(Me 2 SiO) a SiMeVi 2 , Hex 2 MeSiO(Me 2 SiO) a SiMeHex 2 , Vi 3 SiO(Me 2 SiO) a SiVi 3 , Hex 3 SiO(Me 2 SiO) a SiHex 3 , PhMeViSiO(Me 2 SiO) a SiPhMeVi, HexMe 2 SiO(Me 2 SiO) a (MeHexSiO) b SiMe 2 Hex, ViMe 2 SiO(Me 2 SiO) a (MeViSiO) b SiMe 2 Vi, Hex 2 MeSiO(Me 2 SiO) a (MeHexSiO) b SiMeHex 2 , Vi 2 MeSiO(Me 2 SiO) a (MeViSiO) b SiMeVi 2 , Hex 3 SiO(Me 2 SiO) a (MeHexSiO) b SiHex 3 , and Vi 3 SiO(Me 2 SiO) a (MeViSiO) b SiVi 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.

Claim 4

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.

Claim 5

A composition according to claim 1, wherein (C) is selected from chloroplatinic acid or chloroplatinic acid-divinyltetramethyldisiloxane complexes.

Claim 6

A composition according to claim 1, wherein (a) is selected from the group consisting of tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane.

Claim 7

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.

Claim 8

A composition according to claim 1, wherein the alcohol of (b) is selected from the group consisting of ethanol, methanol, and isopropanol.

Claim 9

A composition according to claim 1, wherein (c) is ethylpolysilicate.

Claim 10

A composition according to claim 1, wherein the condensation catalyst is selected from the group consisting of hydrochloric acid, sulfuric acid, and sulfonic acids.

Claim 11

A composition according to claim 1, wherein the quenching agent is a silane having the formula R 5 R 6 R 7 SiZ wherein R 5 , R 6 and R 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 n F 2n+1 CH 2 CH 2 where n is 1 to 6, and Z is a halogen atom or is a group having the formula OR 8 wherein R 8 is a group selected from the group consisting of alkyl groups having from 1 to 6 carbon atoms, aryl groups, and arylalkyl groups.

Claim 12

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.

Claim 13

A composition according to claim 1, wherein the quenching agent further comprises an organic solvent.

Claim 14

A composition according to claim 12, wherein the organic solvent is selected from the group consisting of heptane and xylene.

Claim 15

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.

Claim 16

A composition according to claim 14, wherein the inhibitor is selected from the group consisting of maleates and fumarates.

Claim 17

A composition according to claim 14, wherein the composition further comprises a bath life extender compound.

Claim 18

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.

Claim 19

A composition according to claim 1, wherein the composition further comprises a diluent.

Claim 20

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.

Claim 21

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.

Claim 22

A composition according to claim 19, wherein (A) is selected from the group consisting of ViMe 2 SiO(Me 2 SiO) a SiMe 2 Vi, HexMe 2 SiO(Me 2 SiO) a SiMe 2 Hex, Vi 2 MeSiO(Me 2 SiO) a SiMeVi 2 , Hex 2 MeSiO(Me 2 SiO) a SiMeHex 2 , Vi 3 SiO(Me 2 SiO) a SiVi 3 , Hex 3 SiO(Me 2 SiO) a SiHex 3 , PhMeViSiO(Me 2 SiO) a SiPhMeVi, HexMe 2 SiO(Me 2 SiO) a (MeHexSiO) b SiMe 2 Hex, ViMe 2 SiO(Me 2 SiO) a (MeViSiO) b SiMe 2 Vi, Hex 2 MeSiO(Me 2 SiO) a (MeHexSiO) b SiMeHex 2 , Vi 2 MeSiO(Me 2 SiO) a (MeViSiO) b SiMeVi 2 , Hex 3 SiO(Me 2 SiO) a (MeHexSiO) b SiHex 3 , and Vi 3 SiO(Me 2 SiO) a (MeViSiO) b SiVi 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.

Claim 23

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.

Claim 24

A composition according to claim 19, wherein (C) is selected from chloroplatinic acid or chloroplatinic acid-divinyltetramethyldisiloxane complexes.

Claim 25

A composition according to claim 19, wherein (i) is selected from the group consisting of tetramethoxysilane, tetraethoxysilane, and tetrapropoxysilane.

Claim 26

A composition according to claim 19, wherein (ii) is tetrachlorosilane.

Claim 27

A composition according to claim 19, wherein (iii) is ethylpolysilicate.

Claim 28

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.

Claim 29

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.

Claim 30

A composition according to claim 19, wherein the alcohol is selected from the group consisting of ethanol, methanol, and isopropanol.

Claim 31

A composition according to claim 19, wherein the condensation catalyst is selected from the group consisting of hydrochloric acid, sulfuric acid, and sulfonic acids.

Claim 32

A composition according to claim 19, further comprising heating the mixture after step (III).

Claim 33

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.

Claim 34

A composition according to claim 31, wherein the composition further comprises a bath life extender compound.

Claim 35

A composition according to claim 19, wherein the composition further comprises a diluent.

Claim 36

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 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 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.

Claim 37

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 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 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.

Claim 38

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.

Claim 39

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.