US4528314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent membrane structures
Assignee: General Electric Co
•
Filing: 1984-03-26
•
Granted: 1985-07-09
•
Expires: 2004-03-26
Abstract
Abstract A dirt resistant silicone coating composition comprising: (1) a base vinyl chainstopped polysiloxane, (2) a resinous organopolysiloxane copolymer, (3) a platinum catalyst and, (4) a liquid organohydrogenpolysiloxane crosslinking agent.
Inventors
- 👤 Frank J. Modic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
247 words
A curable silicone coating composition which is resistant to dirt pickup, consisting essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR7## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n has a value sufficient to provide a viscosity of up to 500 centipoise at 25° C.; (b) 75 to 125 parts by weight of a solid resinous organopolysiloxane copolymer comprising (R 2 ) 3 SiO 0 .5 units and SiO 2 units, where R 2 is selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where the molar ratio of (R 2 ) 3 SiO 0 .5 units to SiO 2 units is from about 0.5:1 to about 1:1, and where from about 1.5 to about 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.(4-a-b)/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, where R is as previously defined, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
Claim 2
Dependent Claim
247 words
A curable silicone coating composition which is resistant to dirt pickup, consisting essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR7## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n has a value sufficient to provide a viscosity of up to 500 centipoise at 25° C.; (b) 75 to 125 parts by weight of a solid resinous organopolysiloxane copolymer comprising (R 2 ) 3 SiO 0 .5 units and SiO 2 units, where R 2 is selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where the molar ratio of (R 2 ) 3 SiO 0 .5 units to SiO 2 units is from about 0.5:1 to about 1:1, and where from about 1.5 to about 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.(4-a-b)/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, where R is as previously defined, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
Claim 3
Dependent Claim
269 words
A curable silicone coating composition which is resistant to dirt pickup, consisting essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR8## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n is sufficient to provide a viscosity up to 1,000 centipoise at 25° C.; (b) 75 to 125 parts by weight of a solid resinous organopolysiloxane copolymer comprising (R 3 ) 3 SiO 0 .5 units, (R 3 ) 2 SiO units and SiO 2 units, where R 3 is selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where from about 1.5 to about 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups, and where the molar ratio of (R 3 ) 3 SiO 0 .5 units to SiO 2 units is from about 0.5:1 to about 1:1 and the ratio of (R 3 ) 2 SiO units to SiO 2 units may range up to 0.1:1; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.(4-a-b)/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, where R is as previously defined, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
Claim 4
Dependent Claim
269 words
A curable silicone coating composition which is resistant to dirt pickup, consisting essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR8## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n is sufficient to provide a viscosity up to 1,000 centipoise at 25° C.; (b) 75 to 125 parts by weight of a solid resinous organopolysiloxane copolymer comprising (R 3 ) 3 SiO 0 .5 units, (R 3 ) 2 SiO units and SiO 2 units, where R 3 is selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where from about 1.5 to about 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups, and where the molar ratio of (R 3 ) 3 SiO 0 .5 units to SiO 2 units is from about 0.5:1 to about 1:1 and the ratio of (R 3 ) 2 SiO units to SiO 2 units may range up to 0.1:1; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.(4-a-b)/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, where R is as previously defined, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
Claim 5
Dependent Claim
14 words
The composition of claim 1, further consisting essentially of a finely divided inorganic filler.
Claim 6
Dependent Claim
14 words
The composition of claim 2, further consisting essentially of a finely divided inorganic filler.
Claim 7
Dependent Claim
32 words
The composition of claim 1, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are selected from the group consisting of methyl and phenyl radicals.
Claim 8
Dependent Claim
32 words
The composition of claim 2, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are selected from the group consisting of methyl and phenyl radicals.
Claim 9
Dependent Claim
24 words
The composition of claim 1, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are methyl radicals.
Claim 10
Dependent Claim
24 words
The composition of claim 2, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are methyl radicals.
Claim 11
Dependent Claim
24 words
The composition of claim 1, wherein the viscosity of the vinyl chainstopped polysiloxane ranges from about 100 to about 500 centipoise at 25° C.
Claim 12
Dependent Claim
24 words
The composition of claim 2, wherein the viscosity of the vinyl chainstopped polysiloxane ranges from about 100 to about 500 centipoise at 25° C.
Claim 13
Dependent Claim
33 words
The composition of claim 1, wherein the radicals represented by R 2 in the resinous organopolysiloxane copolymer which are not vinyl radicals are selected from the group consisting of methyl and phenyl radicals.
Claim 14
Dependent Claim
33 words
The composition of claim 2, wherein the radicals represented by R 3 in the resinous organopolysiloxane copolymer which are not vinyl radicals are selected from the group consisting of methyl and phenyl radicals.
Claim 15
Dependent Claim
27 words
The composition of claim 1, wherein all of the radicals represented by R 2 in the resinous organopolysiloxane copolymer which are not vinyl radicals are methyl radicals.
Claim 16
Dependent Claim
27 words
The composition of claim 2, wherein all of the radicals represented by R 3 in the resinous organopolysiloxane copolymer which are not vinyl radicals are methyl radicals.
Claim 17
Dependent Claim
47 words
The composition of claim 1 wherein the organohydrogenpolysiloxane is selected from the group consisting of 1,3,5,7-tetramethylcyclotetrasiloxane, dimethylhydrogen chainstopped dimethylpolysiloxanes, and polysiloxanes of 2 to 10 silicon atoms having dimethylsiloxane units, methylhydrogensiloxane units and trimethylsiloxane units and low viscosity fluids composed of dimethylhydrogensiloxane units and SiO 2 units.
Claim 18
Dependent Claim
52 words
The composition of claim 2, wherein the organohydrogenpolysiloxane is selected from the group consisting of 1,3,5,7-tetramethylcyclotetrasiloxane, dimethylhydrogen chainstopped dimethylpolysiloxanes, polysiloxanes of 2 to 10 silicon atoms having dimethylsiloxane units, methylhydrogensiloxane units and trimethylsiloxane units, and low viscosity fluids composed of dimethylhydrogensiloxane units and SiO 2 units in a ratio of about 2:1.
Claim 19
Dependent Claim
34 words
The composition of claim 3, wherein the finely divided inorganic filler is selected from the group consisting of ground quartz, titanium dioxide, ferric oxide, chromic oxide, glass fibers, calcium carbonate, carbon black and talc.
Claim 20
Dependent Claim
34 words
The composition of claim 4, wherein the finely divided inorganic filler is selected from the group consisting of ground quartz, titanium dioxide, ferric oxide, chromic oxide, glass fibers, calcium carbonate, carbon black and talc.
Claim 21
Dependent Claim
37 words
The composition of claim 1, wherein the catalyst is present in an amount sufficient to provide from about 10 -3 to about 10 -6 gram atoms of platinum per mole of silicon-bonded vinyl groups in the composition.
Claim 22
Dependent Claim
37 words
The composition of claim 2, wherein the catalyst is present in an amount sufficient to provide from about 10 -3 to about 10 -6 grams atoms of platinum per mole of silicon-bonded vinyl groups in the composition.
Claim 23
Dependent Claim
6 words
The cured composition of claim 1.
Claim 24
Dependent Claim
6 words
The cured composition of claim 2.
Claim 25
Independent Claim
293 words
A method for making a curable silicone coating composition which is resistant to dirt pickup comprising mixing a composition consisting essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR9## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n has a value sufficient to provide a viscosity up to about 1,000 centipoise at 25° C.; (b) 75 to 100 parts by weight of a solid resinous organopolysiloxane copolymer comprising: (i) (R 2 ) 3 SiO 0 .5 units and SiO 2 units, (ii) (R 3 ) 3 SiO 0 .5 units, (R 3 ) 2 SiO units and SiO 2 units, or (iii) mixtures thereof, where R 2 and R 3 are selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where from about 1.5 to about 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups, where the molar ratio of monofunctional units to tetra-functional units is from about 0.5:1 to about 1:1, and the molar ratio of difunctional units to tetra-functional units ranges up to about 0.1:1; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.(4-a-b)/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, R is a monovalent hydrocarbon radical free of aliphatic unsaturation, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
Claim 26
Independent Claim
293 words
A method for making a curable silicone coating composition which is resistant to dirt pickup comprising mixing a composition consisting essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR9## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n has a value sufficient to provide a viscosity up to about 1,000 centipoise at 25° C.; (b) 75 to 100 parts by weight of a solid resinous organopolysiloxane copolymer comprising: (i) (R 2 ) 3 SiO 0 .5 units and SiO 2 units, (ii) (R 3 ) 3 SiO 0 .5 units, (R 3 ) 2 SiO units and SiO 2 units, or (iii) mixtures thereof, where R 2 and R 3 are selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where from about 1.5 to about 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups, where the molar ratio of monofunctional units to tetra-functional units is from about 0.5:1 to about 1:1, and the molar ratio of difunctional units to tetra-functional units ranges up to about 0.1:1; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.(4-a-b)/2 sufficient to provide from about 0.5 to about 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, R is a monovalent hydrocarbon radical free of aliphatic unsaturation, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule.
Claim 27
Dependent Claim
16 words
The method of claim 23, further comprising mixing into the composition a finely divided inorganic filler.
Claim 28
Dependent Claim
32 words
The method of claim 23, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are selected from the group consisting of methyl and phenyl radicals.
Claim 29
Dependent Claim
24 words
The method of claim 23, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are methyl radicals.
Claim 30
Dependent Claim
24 words
The method of claim 23, wherein the viscosity of the vinyl chainstopped polysiloxane ranges from about 100 to about 500 centipoise at 25° C.
Claim 31
Dependent Claim
38 words
The method of claim 23, wherein all of the radicals represented by R 2 and R 3 in the resinous organopolysiloxane copolymer which are not vinyl radicals are selected from the group consisting of methyl and phenyl radicals.
Claim 32
Dependent Claim
30 words
The method of claim 23, wherein all of the radicals represented by R 2 and R 3 in the resinous organopolysiloxane copolymer which are not vinyl radicals are methyl radicals.
Claim 33
Dependent Claim
52 words
The method of claim 23, wherein the organohydrogenpolysiloxane is selected from the group consisting of 1,3,5,7-tetramethylcyclotetrasiloxane, dimethylhydrogen chain-stopped dimethylpolysiloxanes, polysiloxanes of 2 to 10 silicon atoms having dimethylsiloxane units, methylhydrogensiloxane units and trimethylsiloxane units, and low viscosity fluids composed of dimethylhydrogensiloxane units and SiO 2 units in a ratio of about 2:1.
Claim 34
Dependent Claim
34 words
The method of claim 24, wherein the finely divided inorganic filler is selected from the group consisting of ground quartz, titanium dioxide, ferric oxide, chromic oxide, glass fibers, calcium carbonate, carbon black and talc.
Claim 35
Dependent Claim
37 words
The method of claim 23, wherein the catalyst is present in an amount sufficient to provide from about 10 -3 to about 10 -6 gram atoms of platinum per mole of silicon-bonded vinyl groups in the composition.
Claim 36
Independent Claim
309 words
A method for rendering substrates resistant to dirt pickup comprising the steps: I. mixing a composition essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR10## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n has a value sufficient to provide a viscosity up to about 1,000 centipoise at 25° C.; (b) 75 to 125 parts by weight of a solid resinous organopolysiloxane copolymer comprising: (i) (R 2 ) 3 SiO 0 .5 units and SiO 2 units, (ii) (R 3 ) 3 SiO 0 .5 units, (R 3 ) 2 SiO units and SiO 2 units, or (iii) mixtures thereof, where R 2 and R 3 are selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where from about 1.5 to 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups, where the molar ratio of monofunctional units to tetrafunctional units is from about 0.5:1 to about 1:1, and the molar ratio of difunctional units to tetrafunctional units ranges up to about 0.1:1; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.4-a-b/2 sufficient to provide from about 0.5 to 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, R is a monovalent hydrocarbon radical free of aliphatic unsaturation, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule; II. applying the mixture of step (I) to a suitable substrate; and III. curing the mixture of step (I) to the substrate.
Claim 37
Independent Claim
309 words
A method for rendering substrates resistant to dirt pickup comprising the steps: I. mixing a composition essentially of: (a) 100 parts by weight of a liquid vinyl chainstopped polysiloxane having the formula, ##STR10## where R and R 1 are monovalent hydrocarbon radicals free of aliphatic unsaturation with at least 50 mole percent of the R 1 groups being methyl, and where n has a value sufficient to provide a viscosity up to about 1,000 centipoise at 25° C.; (b) 75 to 125 parts by weight of a solid resinous organopolysiloxane copolymer comprising: (i) (R 2 ) 3 SiO 0 .5 units and SiO 2 units, (ii) (R 3 ) 3 SiO 0 .5 units, (R 3 ) 2 SiO units and SiO 2 units, or (iii) mixtures thereof, where R 2 and R 3 are selected from the group consisting of vinyl radicals and monovalent hydrocarbon radicals free of aliphatic unsaturation, where from about 1.5 to 10 mole percent of the silicon atoms contain silicon-bonded vinyl groups, where the molar ratio of monofunctional units to tetrafunctional units is from about 0.5:1 to about 1:1, and the molar ratio of difunctional units to tetrafunctional units ranges up to about 0.1:1; (c) a platinum or platinum-containing catalyst; and (d) a liquid organohydrogenpolysiloxane having the formula, (R).sub.a (H).sub.b SiO.sub.4-a-b/2 sufficient to provide from about 0.5 to 1.0 silicon-bonded hydrogen atoms per silicon-bonded vinyl group, R is a monovalent hydrocarbon radical free of aliphatic unsaturation, a has a value of from about 1.0 to about 2.1, b has a value of from about 0.1 to about 1.0, and the sum of a and b is from about 2.0 to about 2.7, there being at least two silicon-bonded hydrogen atoms per molecule; II. applying the mixture of step (I) to a suitable substrate; and III. curing the mixture of step (I) to the substrate.
Claim 38
Dependent Claim
16 words
The method of claim 33, further comprising mixing into the composition a finely divided inorganic filler.
Claim 39
Dependent Claim
32 words
The method of claim 33, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are selected from the group consisting of methyl and phenyl radicals.
Claim 40
Dependent Claim
24 words
The method of claim 33, wherein all of the radicals represented by R and R 1 in the vinyl chainstopped polysiloxane are methyl radicals.
Claim 41
Dependent Claim
24 words
The method of claim 33, wherein the viscosity of the vinyl chainstopped polysiloxane ranges from about 100 to about 500 centipoise at 25° C.
Claim 42
Dependent Claim
38 words
The method of claim 33, wherein all of the radicals represented by R 2 and R 3 in the resinous organopolysiloxane copolymer which are not vinyl radicals are selected from the group consisting of methyl and phenyl radicals.
Claim 43
Dependent Claim
30 words
The method of claim 33, wherein all of the radicals represented by R 2 and R 3 in the resinous organopolysiloxane copolymer which are not vinyl radicals are methyl radicals.
Claim 44
Dependent Claim
34 words
The method of claim 34, wherein the finely divided inorganic filler is selected from the group consisting of ground quartz, titanium dioxide, ferric oxide, chromic oxide, glass fibers, calcium carbonate, carbon black and talc.
Claim 45
Dependent Claim
37 words
The method of claim 33, wherein the catalyst is present in an amount sufficient to provide from about 10 -3 to about 10 -6 gram atoms of platinum per mole of silicon-bonded vinyl groups in the composition.
Claim 46
Dependent Claim
52 words
The method of claim 33, wherein the organohydrogenpolysiloxane is selected from the group consisting of 1,3,5,7-tetramethylcyclotetrasiloxane, dimethylhydrogen chainstopped dimethylpolysiloxane, polysiloxanes of 2 to 10 silicon atoms having dimethylsiloxane units, methylhydrogensiloxane units and trimethylsiloxane units, and low viscosity fluids composed of dimethylhydrogensiloxane units and SiO 2 units in a ratio of about 2:1.
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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) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |