Patent US4439494A successfully refreshed from Google Patents.
US4439494A
Expired / Lapsed
US
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Silyl-polyacrylates for polycarbonate substrates
Assignee: General Electric Co
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Filing: 1982-03-01
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Granted: 1984-03-27
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Expires: 2002-03-01
Abstract
Abstract Heat curable hard coat compositions are provided of aqueous colloidal silica and copolymer of an alkylacrylate and a polyalkoxysilylacrylate or a mixture of an alkylacrylate-acrylic acid copolymer and an epoxyalkoxysilane. The heat curable hardcoat composition can be applied onto various substrates, for example, a polycarbonate substrate, and thereafter heat cured to produce coated articles having adherent and abrasion resistant coatings.
Inventors
- 👤 Daniel R. Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:44
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/08; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/046; C09D143/00; C09D143/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
89 words
Heat curable hardcoat compositions comprising the product obtained by mixing together the following essential ingredients by weight, (A) 20 to 80% of colloidal silica utilized as an aqueous dispersion having at least 10% by weight of colloidal silica solids, (B) 80 to 20% of a silyl-containing polyacrylate selected from the class consisting of (i) an alkylacrylate-acryloxyalkyl polyalkoxysilane copolymer and (ii) a mixture of a carboxy containing polyalkylacrylate and an epoxy silane and (C) 1% to 20% of a UV absorber, based on the weight of (A), (B) and (C).
Claim 2
Dependent Claim
89 words
Heat curable hardcoat compositions comprising the product obtained by mixing together the following essential ingredients by weight, (A) 20 to 80% of colloidal silica utilized as an aqueous dispersion having at least 10% by weight of colloidal silica solids, (B) 80 to 20% of a silyl-containing polyacrylate selected from the class consisting of (i) an alkylacrylate-acryloxyalkyl polyalkoxysilane copolymer and (ii) a mixture of a carboxy containing polyalkylacrylate and an epoxy silane and (C) 1% to 20% of a UV absorber, based on the weight of (A), (B) and (C).
Claim 3
Dependent Claim
18 words
A heat curable hardcoat composition in accordance with claim 1, where the silyl-containing acrylate is a methylmethacrylate/γ-methacryloxypropyltrimethoxysilane copolymer.
Claim 4
Dependent Claim
24 words
A heat curable hardcoat composition in accordance with claim 1, where the silane containing acrylate is a mixture of methylmethacrylate/methacrylic acid copolymer and glycidoxypropyltrimethoxysilane.
Claim 5
Dependent Claim
20 words
A heat curable hardcoat composition in accordance with claim 1, where the UV absorber is (C.sub.6 H.sub.5).sub.2 C═C(CN)CO.sub.2 C.sub.8 H.sub.17.
Claim 6
Dependent Claim
16 words
A heat curable hardcoat composition in accordance with claim 1, where the UV absorber is ##STR6##
Claim 7
Dependent Claim
16 words
A heat curable hardcoat composition in accordance with claim 1, where the UV absorber is ##STR7##
Claim 8
Dependent Claim
16 words
A heat curable hardcoat composition in accordance with claim 1, where the UV absorber is ##STR8##
Claim 9
Dependent Claim
16 words
A heat curable hardcoat composition in accordance with claim 1, where the UV absorber is ##STR9##
Claim 10
Dependent Claim
16 words
A heat curable hardcoat composition in accordance with claim 1, where the UV absorber is ##STR10##
Claim 11
Independent Claim
109 words
A method of improving the abrasion resistance of a thermoplastic substrate which comprises (1) treating the surface of the thermoplastic substrate with a heat curable hardcoat composition and (2) heating the treated substrate to a temperature in the range of from 85° C. to 140° C., where the heat curable hardcoat composition comprises by weight, (A) 20 to 80% of colloidal silica, (B) 80 to 20% of a silyl-containing acrylate selected from the class consisting of (i) an alkylacrylate-acryloxyalkyl polyalkoxysilane copolymer or (ii) a mixture of alkylacrylateacrylic acid copolymer and a glycidoxyalkylpolyalkoxysilane (C) 1% to 20% of a UV absorber, based on the weight of (A), (B), and (C).
Claim 12
Independent Claim
109 words
A method of improving the abrasion resistance of a thermoplastic substrate which comprises (1) treating the surface of the thermoplastic substrate with a heat curable hardcoat composition and (2) heating the treated substrate to a temperature in the range of from 85° C. to 140° C., where the heat curable hardcoat composition comprises by weight, (A) 20 to 80% of colloidal silica, (B) 80 to 20% of a silyl-containing acrylate selected from the class consisting of (i) an alkylacrylate-acryloxyalkyl polyalkoxysilane copolymer or (ii) a mixture of alkylacrylateacrylic acid copolymer and a glycidoxyalkylpolyalkoxysilane (C) 1% to 20% of a UV absorber, based on the weight of (A), (B), and (C).
Claim 13
Dependent Claim
15 words
A method of in accordance with claim 10 where the thermoplastic substrate is polycarbonate sheet.
Claim 14
Dependent Claim
16 words
A method of in accordance with claim 10 where the silyl-containing acrylate is a methylmethacrylate/γ-methacryloxypropyltrimethoxysilane copolymer.
Claim 15
Dependent Claim
21 words
A method of in accordance with claim 10 where the silyl-containing acrylate is a mixture of methylmethacrylate/methacrylic acid copolymer and glycidoxypropyltrimethoxysilane.
Claim 16
Dependent Claim
9 words
A polycarbonate substrate treated in accordance with claim 10.
References Cited (Backward Citations)
US4027073A
Cited
US4348462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |