US4224378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant organopolysiloxane coated polycarbonate article
Assignee: General Electric Co
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Filing: 1978-11-01
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Granted: 1980-09-23
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Expires: 1998-11-01
Abstract
Abstract A coated polycarbonate article, and a process for producing said article, having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited thereon (i) a primer layer comprised of a thermoplastic acrylic polymer; and (ii) a top coat containing a thermoset organopolysiloxane disposed on said primer layer. The process for producing said coated polycarbonate article comprises (i) priming the surface of a polycarbonate substrate with a thermoplastic acrylic polymer by forming a thin film of said thermoplastic acrylic polymer on the surface of said substrate, (ii) applying a top coating composition containing a further curable organopolysiloxane onto the primed substrate, and (iii) curing the further curable organopolysiloxane to form a hard, abrasion and chemical solvent resistant top coat which is tenaciously adhered to the polycarbonate substrate.
Inventors
- 👤 Siegfried H. Schroeter
- 👤 Daniel R. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:52
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/046; C08J2369/00; C08J2433/00; C08J2433/04; C08J2433/06; C08J2483/00; C08J2483/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31667; Y10T428/31855
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on the surface thereof (i) an adhesion promoting primer layer consisting essentially of a thermoplastic acrylic polymer; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer layer, said top coat being tenaciously and uniformly adhered to said polycarbonate substrate by means of said primer layer.
Claim 2
Dependent Claim
71 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on the surface thereof (i) an adhesion promoting primer layer consisting essentially of a thermoplastic acrylic polymer; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer layer, said top coat being tenaciously and uniformly adhered to said polycarbonate substrate by means of said primer layer.
Claim 3
Dependent Claim
48 words
The article of claim 1 wherein said thermoplastic acrylic polymer is the polymerization product of at least one compound represented by the general formula CH.sub.2 ═CYCOOR wherein Y represents hydrogen or a methyl radical, and R is an alkyl radical containing from 1 to about 20 carbon atoms.
Claim 4
Dependent Claim
15 words
The article of claim 1 wherein said primer layer contains an ultraviolet light absorbent compound.
Claim 5
Dependent Claim
47 words
The article of claim 1 wherein said organopolysiloxane is the hydrolysis and condensation product of at least one compound represented by the general formula R.sup.2.sub.n SiZ.sub.(4-n) wherein R 2 represents a monovalent hydrocarbon radical, Z represents a hydrolyzable group, and n may vary between 0 and 2.
Claim 6
Dependent Claim
39 words
The article of claim 4 wherein R 2 is selected from the group consisting of alkyl radicals having from 1 to about 8 carbon atoms, alkenyl radicals having from 2 to about 8 carbon atoms, and a phenyl radical.
Claim 7
Dependent Claim
26 words
The article of claim 5 wherein Z represents an --OR 3 group wherein R 3 is a monovalent hydrocarbon radical and n is 0 or 1.
Claim 8
Dependent Claim
39 words
The article of claim 6 wherein R 3 is selected from the group consisting of alkyl radicals containing from 1 to about 8 carbon atoms, alkenyl radicals containing from 2 to about 8 carbon atoms, and the phenyl radical.
Claim 9
Dependent Claim
22 words
The article of claim 7 wherein R 2 is a methyl radical, R 3 is an ethyl radical, and n is 1.
Claim 10
Dependent Claim
20 words
The article of claim 5 wherein Z represents an --OCOR 4 group wherein R 4 is a monovalent hydrocarbon radical.
Claim 11
Dependent Claim
39 words
The article of claim 9 wherein R 4 is selected from the group consisting of alkyl radicals containing from 1 to about 8 carbon atoms, alkenyl radicals containing from 2 to about 8 carbon atoms, and the phenyl radical.
Claim 12
Dependent Claim
13 words
The article of claim 6 wherein R 2 n SiZ.sub.(4-n) is an alkyltrialkoxysilane.
Claim 13
Dependent Claim
15 words
The article of claim 1 wherein said primer layer includes an ultraviolet light absorbent compound.
Claim 14
Dependent Claim
15 words
The article of claim 11 wherein said primer layer includes an ultraviolet light absorbent compound.
Claim 15
Dependent Claim
64 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof (i) an adhesion promoting primer layer consisting essentially of (a) a thermoplastic acrylic polymer, and (b) at least one ultraviolet light absorber; and, (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 16
Dependent Claim
64 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof (i) an adhesion promoting primer layer consisting essentially of (a) a thermoplastic acrylic polymer, and (b) at least one ultraviolet light absorber; and, (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 17
Dependent Claim
50 words
The article of claim 14 wherein said thermoplastic acrylic polymer is comprised of the polymerization product of at least one compound represented by the general formula CH.sub.2 ═CYCOOR wherein Y represents hydrogen or a methyl radical, and R is an alkyl radical containing from 1 to about 20 carbon atoms.
Claim 18
Dependent Claim
53 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof (i) an adhesion promoting primer layer consisting of a thermoplastic acrylic polymer; and (ii) a top coat containing a thermoset organopolysiloxane disposed on said primer layer.
Claim 19
Dependent Claim
53 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof (i) an adhesion promoting primer layer consisting of a thermoplastic acrylic polymer; and (ii) a top coat containing a thermoset organopolysiloxane disposed on said primer layer.
Claim 20
Dependent Claim
50 words
The article of claim 16 wherein said thermoplastic acrylic polymer is comprised of the polymerization product of at least one compound represented by the general formula CH.sub.2 ═CYCOOR wherein Y represents hydrogen or a methyl radical, and R is an alkyl radical containing from 1 to about 20 carbon atoms.
Claim 21
Dependent Claim
63 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof (i) an adhesion promoting primer layer consisting of (a) a thermoplastic acrylic polymer, and (b) at least one ultraviolet light absorber; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 22
Dependent Claim
63 words
A shaped non-opaque coated polycarbonate article having improved mar, scratch, abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited on at least one surface thereof (i) an adhesion promoting primer layer consisting of (a) a thermoplastic acrylic polymer, and (b) at least one ultraviolet light absorber; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 23
Dependent Claim
50 words
The article of claim 18 wherein said thermoplastic acrylic polymer is comprised of the polymerization product of at least one compound represented by the general formula CH.sub.2 ═CYCOOR wherein Y represents hydrogen or a methyl radical, and R is an alkyl radical containing from 1 to about 20 carbon atoms.
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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) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |