Patent US4284685A successfully refreshed from Google Patents.
US4284685A
Expired / Lapsed
US
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Abrasion resistant silicone coated polycarbonate article
Assignee: General Electric Co
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Filing: 1980-01-10
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Granted: 1981-08-18
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Expires: 2000-01-10
Abstract
Abstract A shaped, non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having disposed on the surface thereof a non-opaque primer layer of controlled thickness comprised of a thermoset acrylic polymer and disposed on said primer layer a non-opaque top coat comprised of a colloidal silica filled thermoset organopolysiloxane.
Inventors
- 👤 Daniel R. Olson
- 👤 Ona V. Orkin
- 👤 Karen K. Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:54
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J2369/00; C08J2483/00; C08J2483/04; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
64 words
A coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having adhered on at least one surface thereof (i) an adhesion promoting primer layer having a controlled thickness of from about 0.015 to about 0.15 mils consisting essentially of a thermoset acrylic polymer; and (ii) a top coat on said primer layer comprised of a colloidal silica-filled thermoset organopolysiloxane.
Claim 2
Dependent Claim
64 words
A coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having adhered on at least one surface thereof (i) an adhesion promoting primer layer having a controlled thickness of from about 0.015 to about 0.15 mils consisting essentially of a thermoset acrylic polymer; and (ii) a top coat on said primer layer comprised of a colloidal silica-filled thermoset organopolysiloxane.
Claim 3
Dependent Claim
66 words
The article of claim 1 wherein said colloidal silica-filled thermoset organopolysiloxane is a condensation product of a silanol having the formula RSi(OH) 3 , wherein R is selected from an alkyl radical of from 1 to 3 carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least 70 weight percent of the silanol being CH 3 Si(OH) 3 .
Claim 4
Dependent Claim
21 words
The article of claim 2 wherein said colloidal silica-filled thermoset organopolysiloxane is the condensation product of CH 3 Si(OH) 3 .
Claim 5
Dependent Claim
23 words
The article of claim 2 wherein said colloidal silica-filled thermoset organopolysiloxane contains from about 10 to about 70 weight percent of colloidal silica.
Claim 6
Dependent Claim
22 words
The article of claim 3 wherein said thermoset silica-filled organopolysiloxane contains from about 10 to about 70 weight percent of colloidal silica.
Claim 7
Dependent Claim
17 words
The article of claim 1 wherein said primer layer contains at least one ultraviolet light absorbing agent.
Claim 8
Dependent Claim
114 words
A coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having on at least one surface thereof (i) an adhesion promoting primer layer having a controlled thickness of from about 0.015 to about 0.15 mil consisting essentially of a thermoset acrylic polymer; and (ii) a top coat on said primer layer comprising the thermally cured product of a composition comprising a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of at least one silanol, said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate.
Claim 9
Dependent Claim
114 words
A coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having on at least one surface thereof (i) an adhesion promoting primer layer having a controlled thickness of from about 0.015 to about 0.15 mil consisting essentially of a thermoset acrylic polymer; and (ii) a top coat on said primer layer comprising the thermally cured product of a composition comprising a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of at least one silanol, said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate.
Claim 10
Dependent Claim
14 words
The article of claim 7 wherein said silanol is CH 3 Si(OH) 3 .
Claim 11
Dependent Claim
17 words
The article of claim 7 wherein said primer layer contains at least one ultraviolet light absorbing agent.
Claim 12
Dependent Claim
69 words
A coated polycarbonate article comprising a polycarbonate substrate having on at least one surface thereof (i) an adhesion promoting primer layer having a controlled thickness of from about 0.015 to about 0.15 mil consisting essentially of a thermoset acrylic polymer, and (ii) a top coat on said primer layer comprised of a colloidal silica-filled thermoset organopolysiloxane, said thermoset organopolysiloxane being the thermally cured product of at least one silanol.
Claim 13
Dependent Claim
69 words
A coated polycarbonate article comprising a polycarbonate substrate having on at least one surface thereof (i) an adhesion promoting primer layer having a controlled thickness of from about 0.015 to about 0.15 mil consisting essentially of a thermoset acrylic polymer, and (ii) a top coat on said primer layer comprised of a colloidal silica-filled thermoset organopolysiloxane, said thermoset organopolysiloxane being the thermally cured product of at least one silanol.
Claim 14
Dependent Claim
23 words
The article of claim 10 wherein said colloidal silica-filled thermoset organopolysiloxane contains from about 10 to about 70 weight percent of colloidal silica.
Claim 15
Dependent Claim
14 words
The article of claim 11 wherein said silanol is CH 3 Si(OH) 3 .
Claim 16
Dependent Claim
17 words
The article of claim 10 wherein said primer layer contains at least one ultraviolet light absorbing agent.
Claim 17
Dependent Claim
113 words
A coated polycarbonate article comprising a polycarbonate substrate having on at least one surface thereof (i) a primer layer having a controlled thickness of from about 0.015 to about 0.15 mil consisting essentially of a thermoset acrylic polymer which is the thermally cured product of a thermosettable acrylic polymer; and (ii) a top coat composition on said primer layer, said top coat composition comprising a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of at least one silanol, said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate.
Claim 18
Dependent Claim
113 words
A coated polycarbonate article comprising a polycarbonate substrate having on at least one surface thereof (i) a primer layer having a controlled thickness of from about 0.015 to about 0.15 mil consisting essentially of a thermoset acrylic polymer which is the thermally cured product of a thermosettable acrylic polymer; and (ii) a top coat composition on said primer layer, said top coat composition comprising a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of at least one silanol, said composition containing 10 to 50 weight percent solids consisting essentially of 10 to 70 weight percent colloidal silica and 30 to 90 weight percent of the partial condensate.
Claim 19
Dependent Claim
17 words
The article of claim 14 wherein said primer layer contains at least one ultraviolet light absorbing agent.
Claim 20
Dependent Claim
20 words
The article of claim 2 wherein said thermoset acrylic polymer is the thermally cured product of a thermosettable acrylic polymer.
Claim 21
Dependent Claim
46 words
The article of claim 7 wherein said silanol is represented by the formula RSi(OH) 3 wherein R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical.
Claim 22
Dependent Claim
20 words
The article of claim 17 wherein at least 70 weight percent of said silanol is CH 3 Si(OH) 3 .
Claim 23
Dependent Claim
22 words
The article of claim 18 wherein said composition contains sufficient acid to provide a pH in the range of 3.0 to 6.0.
Claim 24
Dependent Claim
20 words
The article of claim 17 wherein said thermoset acrylic polymer is the thermally cured product of a thermosettable acrylic polymer.
Claim 25
Dependent Claim
45 words
The article of claim 11 wherein said silanol is represented by the formula RSi(OH) 3 wherein R is selected from the group consisting of alkyl radicals containing 1 to 3 carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical.
Claim 26
Dependent Claim
20 words
The article of claim 21 wherein at least 70 weight percent of said silanol is CH 3 Si(OH) 3 .
Claim 27
Dependent Claim
20 words
The article of claim 11 wherein said thermoset acrylic polymer is the thermally cured product of a thermosettable acrylic polymer.
References Cited (Backward Citations)
US3582398A
Cited
US3968305A
Cited
US4041120A
Cited
US3707397A
Cited
US3968309A
Cited
US3978178A
Cited
US3986997A
Cited
US4027073A
Cited
US4045602A
Cited
US4188451A
Cited
US4207357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |