Patent US4308317A successfully refreshed from Google Patents.
US4308317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant silicone coated polycarbonate article
Assignee: General Electric Co
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Filing: 1980-01-10
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Granted: 1981-12-29
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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 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 10:58
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/046; C08J2369/00; C08J2433/00; C08J2433/04; C08J2433/06; C08J2433/08; C08J2483/00; C08J2483/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
An improved coated polycarbonate article having improved abrasion and chemical solvent resistance and exhibiting improved weatherability and adhesion of the coating comprising a polycarbonate substrate having adhered on at least one surface thereof (i) an adhesion promoting primer layer consisting essentially of a thermoset acrylic polymer; and (ii) a top coat adherently disposed on said primer layer comprised of a thermoset organopolysiloxane; said improvement consisting essentially of said primer layer having a controlled thickness of from about 0.015 to about 0.15 mils.
Claim 2
Dependent Claim
82 words
An improved coated polycarbonate article having improved abrasion and chemical solvent resistance and exhibiting improved weatherability and adhesion of the coating comprising a polycarbonate substrate having adhered on at least one surface thereof (i) an adhesion promoting primer layer consisting essentially of a thermoset acrylic polymer; and (ii) a top coat adherently disposed on said primer layer comprised of a thermoset organopolysiloxane; said improvement consisting essentially of said primer layer having a controlled thickness of from about 0.015 to about 0.15 mils.
Claim 3
Dependent Claim
19 words
The article of claim 1 wherein said thermoset organopolysiloxane is the hydrolysis and condensation product of an alkyl trialkoxysilane.
Claim 4
Dependent Claim
12 words
The article of claim 1 wherein said trialkoxysilane is an alkyl triethoxysilane.
Claim 5
Dependent Claim
13 words
The article of claim 2 wherein said alkyl trialkoxysilane is a methyl trialkoxysilane.
Claim 6
Dependent Claim
12 words
The article of claim 4 wherein said methyl trialkoxysilane is methyl triethoxysilane.
Claim 7
Dependent Claim
20 words
The article of claim 1 wherein said thermoset acrylic polymer is the thermally cured product of a thermosettable acrylic polymer.
Claim 8
Dependent Claim
90 words
An improved coated polycarbonate article having improved abrasion and chemical solvent resistance and exhibiting improved weatherability and adhesion of the coating comprising a polycarbonate substrate having adhered on at least one surface thereof (i) an adhesion promoting primer layer consisting essentially of a thermoset acrylic polymer and at least one ultraviolet radiation absorbing compound; and (ii) a top coat adherently disposed on said primer layer comprised of a thermoset organopolysiloxane; said improvement consisting essentially of said primer layer having a controlled thickness of from about 0.015 to about 0.15 mils.
Claim 9
Dependent Claim
90 words
An improved coated polycarbonate article having improved abrasion and chemical solvent resistance and exhibiting improved weatherability and adhesion of the coating comprising a polycarbonate substrate having adhered on at least one surface thereof (i) an adhesion promoting primer layer consisting essentially of a thermoset acrylic polymer and at least one ultraviolet radiation absorbing compound; and (ii) a top coat adherently disposed on said primer layer comprised of a thermoset organopolysiloxane; said improvement consisting essentially of said primer layer having a controlled thickness of from about 0.015 to about 0.15 mils.
Claim 10
Dependent Claim
20 words
The article of claim 7 wherein said thermoset organopolysiloxane is the hydrolysis and condensation product of at least one alkyltrialkoxysilane.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |