US4510283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone-type coating resin solution
Assignee: Fujitsu Ltd
•
Filing: 1983-12-12
•
Granted: 1985-04-09
•
Expires: 2003-12-12
Abstract
Abstract A silicone-type coating resin solution and a process for preparing the solution. This solution comprises 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetraethoxysilane (PDAS) having a weight average molecular weight of 1,000 to 6,000 and 70 to 40 parts by weight of a polysilsesquioxane prepolymer (PLOS) having a weight average molecular weight of 2,500 to 7,000 and in which each of 5 to 50 mole % of the organic groups attached directly to the silicon atoms is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, these polymer components being dissolved in an organic solvent having a boiling point of not less than 110 DEG C. under a pressure of 760 mmHg. This solution is prepared by dissolving PDAS and PLOS in an organic solvent having a high boiling point and treating the resultant solution under a reduced pressure of not more than 5 mmHg.
Inventors
- 👤 Shiro Takeda
- 👤 Minoru Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/10; C08; C08G; C08G77/00; C08G77/42; C08G77/44
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
113 words
A silicone coating resin organic solvent solution comprising 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetra-ethoxysilane having a weight average molecular weight of 1,000 to 6,000, 70 to 40 parts by weight of a polysilsesquioxane prepolymer having a weight average molecular weight of 2,500 to 7,000, in which each of 5 to 50 mole% of the organic groups attached directly to the silicon atoms of the polysilsesquioxane prepolymer is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, and said solvent being an organic compound having a boiling point of not less than 100° C. under a pressure of 760 mmHg.
Claim 2
Dependent Claim
113 words
A silicone coating resin organic solvent solution comprising 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetra-ethoxysilane having a weight average molecular weight of 1,000 to 6,000, 70 to 40 parts by weight of a polysilsesquioxane prepolymer having a weight average molecular weight of 2,500 to 7,000, in which each of 5 to 50 mole% of the organic groups attached directly to the silicon atoms of the polysilsesquioxane prepolymer is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, and said solvent being an organic compound having a boiling point of not less than 100° C. under a pressure of 760 mmHg.
Claim 3
Dependent Claim
17 words
A solution as claimed in claim 1, wherein the halogen content is not greater than 10 ppm.
Claim 4
Dependent Claim
24 words
A solution as claimed in claim 1, wherein the solvent is chosen from the group consisting of ethylene glycol monoether acetates, ketones and alcohols.
Claim 5
Dependent Claim
41 words
A silicone coating resin solution as claimed in claim 3, wherein the solvent is chosen from the group consisting of ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, methyl isobutyl ketone and n-butyl alcohol.
Claim 6
Dependent Claim
16 words
A solution as claimed in claim 1, wherein the solvent is ethylene glycol monobutyl ether acetate.
Claim 7
Dependent Claim
149 words
A process for producing a silicone coating resin organic solvent solution comprising: dissolving 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetraethosysilane having a weight average molecular weight of 1,000 to 6,000 and 70 to 40 parts by weight of a polysilsesquioxane prepolymer having a weight average molecular weight of 2,500 to 7,000 and in which each of 5 to 50 mole% of the organic groups attached directly to the silicon atoms is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, in said solvent which is selected to be of an organic compound and to have a boiling point of not less than 110° C. under a pressure of 760 mmHg, said parts by weight being calculated in terms of solids content; and treating the resultant solution under a reduced pressure of not greater than 5 mmHg.
Claim 8
Dependent Claim
149 words
A process for producing a silicone coating resin organic solvent solution comprising: dissolving 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetraethosysilane having a weight average molecular weight of 1,000 to 6,000 and 70 to 40 parts by weight of a polysilsesquioxane prepolymer having a weight average molecular weight of 2,500 to 7,000 and in which each of 5 to 50 mole% of the organic groups attached directly to the silicon atoms is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, in said solvent which is selected to be of an organic compound and to have a boiling point of not less than 110° C. under a pressure of 760 mmHg, said parts by weight being calculated in terms of solids content; and treating the resultant solution under a reduced pressure of not greater than 5 mmHg.
Claim 9
Dependent Claim
182 words
A process for producing a silicone coating resin organic solvent solution comprising: dissolving 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetraethosysilane having a weight average molecular weight of 1,000 to 6,000 in a solvent having a boiling point of not less than 110° C. under a pressure of 760 mmHg, said parts by weight being calculated in terms of solids content; treating the resultant solution under a reduced pressure of not greater than 5 mmHg. mixing the thus treated hydrolytic condensation polymer of tetramethoxysilane or tetraethosysilane solution with a solution of 70 to 40 parts by weight of a polysilsesquioxane prepolymer having a weight average molecular weight of 2,500 to 7,000 and in which each of 5 to 50 mole% of the organic groups attached directly to the silicon atoms is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, in said solvent which is selected to be of an organic compound and to have a boiling point of not less than 110° C. under a pressure of 760 mmHg.
Claim 10
Dependent Claim
182 words
A process for producing a silicone coating resin organic solvent solution comprising: dissolving 30 to 60 parts by weight of a hydrolytic condensation polymer of tetramethoxysilane or tetraethosysilane having a weight average molecular weight of 1,000 to 6,000 in a solvent having a boiling point of not less than 110° C. under a pressure of 760 mmHg, said parts by weight being calculated in terms of solids content; treating the resultant solution under a reduced pressure of not greater than 5 mmHg. mixing the thus treated hydrolytic condensation polymer of tetramethoxysilane or tetraethosysilane solution with a solution of 70 to 40 parts by weight of a polysilsesquioxane prepolymer having a weight average molecular weight of 2,500 to 7,000 and in which each of 5 to 50 mole% of the organic groups attached directly to the silicon atoms is a phenyl group and the remaining organic groups are methyl, ethyl, or vinyl groups, in said solvent which is selected to be of an organic compound and to have a boiling point of not less than 110° C. under a pressure of 760 mmHg.
Claim 11
Dependent Claim
22 words
The solution of claim 2, wherein the solvent is chosen from the group consisting of ethylene glycol monoether acetates, ketones and alcohols.
Claim 12
Dependent Claim
36 words
The solution of claim 8, wherein the solvent is chosen from the group consisting of ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, methyl isobutyl ketone and n-butyl alcohol.
Claim 13
Dependent Claim
14 words
The solution of claim 2, wherein the solvent is ethylene glycol monobutyl ether acetate.
Claim 14
Dependent Claim
20 words
The solution of claim 1 or 2, comprising a solids concentration in the range from 20 to 50% by weight.
Claim 15
Dependent Claim
25 words
The process of claim 6 or 7, wherein said resin coating solution is formed with a solids concentration range from 20 to 50% by weight.
Claim 16
Dependent Claim
24 words
The process of claim 6 or 7, comprising conducting said treating of said solution under a reduced pressure of not more than 3 mmHg.
Claim 17
Dependent Claim
27 words
The process of claim 6 or 7, comprising conducting said treating of said solution under said reduced pressure at a temperature of not more than 40° C.
Claim 18
Dependent Claim
27 words
The process of claim 13, comprising conducting said treating of said solution under said reduced pressure at a temperature in the range from 5° to 28° C.
Claim 19
Dependent Claim
43 words
The process of claim 6 or 7, wherein each of 10 to 40 mole% of the organic groups attached directly to the silicon atoms of the polysilsesquioxane prepolymer is a phenyl group and the remaining organic groups are methyl, ethyl or vinyl groups.
Claim 20
Dependent Claim
13 words
The solution of claim 1 or 2 said solvent being a polar solvent.
Claim 21
Dependent Claim
17 words
The process of claim 6 or 7, wherein the solvent is selected to be a polar solvent.
References Cited (Backward Citations)
US3529035A
Cited
US3624030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |