Patent US4243720A successfully refreshed from Google Patents.
US4243720A
Expired / Lapsed
US
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Silicone coated abrasion resistant polycarbonate article
Assignee: General Electric Co
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Filing: 1978-11-01
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Granted: 1981-01-06
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Expires: 1998-11-01
Abstract
Abstract A non-opaque coated polycarbonate shaped article, and a process for producing the same, having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having thereon (i) a primer layer comprised of a thermoplastic acrylic polymer containing functional groups; and (ii) a top coat containing a thermoset organopolysiloxane on said primer layer. The process for producing said coated polycarbonate article comprises the steps of: (i) priming the surface of a polycarbonate substrate by forming a primer layer comprised of a thermoplastic acrylic polymer containing functional groups; (ii) applying a top coat 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 and durably adhered to the polycarbonate substrate.
Inventors
- 👤 Siegfried H. Schroeter
- 👤 Daniel R. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:50
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: 25
Claim 1
Independent Claim
60 words
A shaped non-opaque coated polycarbonate article having improved 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 substantially non-crosslinked acrylic polymer containing functional groups; and (ii) a tenaciously and uniformly adhered top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 2
Dependent Claim
60 words
A shaped non-opaque coated polycarbonate article having improved 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 substantially non-crosslinked acrylic polymer containing functional groups; and (ii) a tenaciously and uniformly adhered top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 3
Dependent Claim
56 words
The article of claim 1 wherein said thermoplastic acrylic polymer containing functional groups contains functional groups selected from the class consisting of hydroxyl, carboxyl, amine, epoxide, amide, SH, SO 3 H, COOR, Si(OR 1 ) 3 , or mixtures thereof, wherein R and R 1 are alkyl radicals containing from 1 to about 20 carbon atoms.
Claim 4
Dependent Claim
150 words
The article of claim 2 wherein said acrylic polymer containing functional groups contains the polymerization product of (i) at least one monomer represented by the general formula CH 2 ═CY--COOR 2 and at least one monomer represented by the general formula CH 2 ═CY 1 --COOR 3 X; or (ii) at least one monomer represented by the general formula CH 2 ═CY 1 --COOR 2 X; wherein Y and Y 1 are independently selected from hydrogen or a methyl radical; R 2 represents an alkyl radical containing from 1 to about 20 carbon atoms; R 3 represents a divalent saturated aliphatic hydrocarbon radical containing from 1 to about 20 carbon atoms; and X represents a hydroxyl, carboxyl, amine, epoxide, amide, SH, SO 3 H, COOR, or Si(OR 1 ) 3 radical wherein R and R 1 are independently selected from alkyl radicals containing from 1 to about 20 carbon atoms.
Claim 5
Dependent Claim
28 words
The article of claim 3 wherein said acrylic polymer contains the polymerization product of at least one monomer represented by the general formula CH 2 ═CY--COOR 3 X.
Claim 6
Dependent Claim
43 words
The article of claim 3 wherein said acrylic polymer contains the polymerization product of at least one monomer represented by the general formula CH 2 ═CY--COOR 3 X and at least one monomer represented by the general formula CH 2 ═CH--COOR 2 .
Claim 7
Dependent Claim
15 words
The article of claim 2 wherein said primer layer contains an ultraviolet light absorbent compound.
Claim 8
Dependent Claim
49 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 n 4 SiZ.sub.(4-n) wherein R 4 represents a monovalent hydrocarbon radical, Z represents a hydrolyzable group, and n may vary between 0 and 2.
Claim 9
Dependent Claim
39 words
The article of claim 7 wherein R 4 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 10
Dependent Claim
26 words
The article of claim 8 wherein Z represents an --OR 5 group wherein R 5 is a monovalent hydrocarbon, and wherein n is 0 or 1.
Claim 11
Dependent Claim
25 words
The article of claim 9 wherein R 5 is selected from the group consisting of alkyl radicals containing from 1 to about 8 carbon atoms.
Claim 12
Dependent Claim
22 words
The article of claim 10 wherein R 4 is a methyl radical, R 5 is an ethyl radical, and n is 1.
Claim 13
Dependent Claim
20 words
The article of claim 7 wherein z represents an --OCOR 6 group wherein R 6 is a monovalent hydrocarbon radical.
Claim 14
Dependent Claim
13 words
The article of claim 7 wherein R 4 n SiZ.sub.(4-n) represents an alkyltrialkoxysilane.
Claim 15
Dependent Claim
15 words
The article of claim 13 wherein said primer layer includes an ultraviolet light absorbent compound.
Claim 16
Dependent Claim
15 words
The article of claim 1 wherein said primer layer includes an ultraviolet light absorbent compound.
Claim 17
Dependent Claim
67 words
A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate coated on at least one side thereof with (i) an adhesion promoting primer layer consisting essentially of (a) a thermoplastic acrylic polymer containing functional groups, and (b) at least one ultraviolet light absorber; and (ii) a tenaciously adhered top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 18
Dependent Claim
67 words
A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate coated on at least one side thereof with (i) an adhesion promoting primer layer consisting essentially of (a) a thermoplastic acrylic polymer containing functional groups, and (b) at least one ultraviolet light absorber; and (ii) a tenaciously adhered top coat consisting of a thermoset organopolysiloxane disposed on said primer layer.
Claim 19
Dependent Claim
49 words
The article of claim 16 wherein said functional groups are selected from the class consisting of hydroxyl, amine, epoxide, amide, SH, SO 3 H, COOR, Si(OR 1 ) 3 , or mixtures thereof, wherein R and R 1 are alkyl radicals containing from 1 to about 20 carbon atoms.
Claim 20
Dependent Claim
47 words
A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate coated with (i) an adhesion promoting primer consisting of a thermoplastic acrylic polymer having functional groups; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer.
Claim 21
Dependent Claim
47 words
A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate coated with (i) an adhesion promoting primer consisting of a thermoplastic acrylic polymer having functional groups; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer.
Claim 22
Dependent Claim
46 words
The article of claim 18 wherein said functional groups are selected from hydroxyl, carboxyl, amine, epoxide, amide, SH, SO 3 H, COOR, Si(OR 1 ) 3 , or mixtures thereof, wherein R and R 1 represent alkyl radicals containing from 1 to about 20 carbon atoms.
Claim 23
Dependent Claim
69 words
A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate coated on at least one surface thereof with (i) an adhesion promoting primer consisting of (a) a thermoplastic acrylic polymer having functional groups, and (b) an effective ultraviolet light stabilizing amount of at least one ultraviolet light stabilizer; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer.
Claim 24
Dependent Claim
69 words
A shaped non-opaque coated polycarbonate article having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate coated on at least one surface thereof with (i) an adhesion promoting primer consisting of (a) a thermoplastic acrylic polymer having functional groups, and (b) an effective ultraviolet light stabilizing amount of at least one ultraviolet light stabilizer; and (ii) a top coat consisting of a thermoset organopolysiloxane disposed on said primer.
Claim 25
Dependent Claim
46 words
The article of claim 20 wherein said functional groups are selected from hydroxyl, carboxyl, amine, epoxide, amide, SH, SO 3 H, COOR, Si(OR 1 ) 3 , or mixtures thereof, wherein R and R 1 represent alkyl radicals containing from 1 to about 20 carbon atoms.
References Cited (Backward Citations)
US2976184A
Cited
US3379607A
Cited
US3582398A
Cited
US3451838A
Cited
US3488215A
Cited
US3661685A
Cited
US3637416A
Cited
US3701753A
Cited
US4041120A
Cited
US3968305A
Cited
US3707397A
Cited
US3865619A
Cited
US3953115A
Cited
US3968309A
Cited
US3978178A
Cited
US3986997A
Cited
US4027073A
Cited
US4028300A
Cited
US4026826A
Cited
US4064286A
Cited
US4045602A
Cited
US4013065A
Cited
US4080476A
Cited
US4159206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |