Patent US4559271A successfully refreshed from Google Patents.
US4559271A
Expired / Lapsed
US
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Thermoformable silicone resin coating composition and dual component coating system for polycarbonate
Assignee: General Electric Co
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Filing: 1984-07-27
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Granted: 1985-12-17
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Expires: 2004-07-27
Abstract
Abstract Ultraviolet radiation resistant silicone resin coating compositions are provided having improved thermoformability. Improved thermoformability and shortened required aging are achieved by the addition of a Lewis acid compound to the coating compositions is disclosed. Thermoformability is also improved by using the UV screen containing silicone resin coating composition in conjunction with extensible acrylate primers.
Inventors
- 👤 James E. Doin
- 👤 Howard A. Vaughn, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:56
CPC Classifications
C; C09; C09D; C09D183/00; C09D183/04; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J2369/00; C08J2483/00; C08J2483/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31652; Y10T428/31663; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
82 words
A thermoformable coated article comprising a polycarbonate substrate having at least one surface coated with (i) a layer of a thermally dried primer composition comprising about 0.5 to about 10 parts by weight of a thermoplastic acrylic polymer in about 99.5 to about 90 parts by weight of a volatile solvent, and (ii) a layer of a cured top coat comprising a colloidal silica filled thermoset polysiloxane containing a silylated ultraviolet radiation screening compound and a small amount of Lewis acid compound.
Claim 2
Dependent Claim
82 words
A thermoformable coated article comprising a polycarbonate substrate having at least one surface coated with (i) a layer of a thermally dried primer composition comprising about 0.5 to about 10 parts by weight of a thermoplastic acrylic polymer in about 99.5 to about 90 parts by weight of a volatile solvent, and (ii) a layer of a cured top coat comprising a colloidal silica filled thermoset polysiloxane containing a silylated ultraviolet radiation screening compound and a small amount of Lewis acid compound.
Claim 3
Dependent Claim
27 words
An article as defined in claim 1, wherein said acrylic polymer is poly(ethyl methacrylate), said volatile solvent is 2-butoxyethanol, and said ultraviolet radiation screening compound is 4(3-triethoxysilylpropoxy)-2-hydroxybenzophenone.
Claim 4
Dependent Claim
16 words
An article as defined in claim 2 in which the Lewis acid compound is ferric chloride.
Claim 5
Dependent Claim
32 words
An article as defined in claim 1, wherein said volatile solvent is selected from the group consisting of ethyleneglycol diacetate, butoxyethanol, ethoxy ethanol, diacetone alcohol, hydroxyethyl acetate, cellosolve acetate, and combinations thereof.
Claim 6
Dependent Claim
14 words
An article as defined in claim 4, wherein said acrylic polymer is poly(ethyl methacrylate).
Claim 7
Dependent Claim
14 words
An article as defined in claim 4, wherein said acrylic polymer is poly(isobutyl methacrylate).
Claim 8
Dependent Claim
15 words
An article as defined in claim 1, wherein said ultraviolet radiation screening compound is 4(3-triethoxysilylpropoxy)-2-hydroxybenzophenone.
Claim 9
Dependent Claim
83 words
A thermoformable coated article comprising a polycarbonate substrate having at least one surface coated with (i) a layer of a thermally dried primer composition comprising about 0.5 to about 10 parts by weight of a thermoplastic acrylic polymer in about 99.5 to about 90 parts by weight of a volatile solvent, and (ii) a layer of a cured top coat comprising a colloidal silica filled thermoset polysiloxane containing a silylated ultraviolet radiation screening compound and a small amount of a Lewis acid compound.
Claim 10
Dependent Claim
83 words
A thermoformable coated article comprising a polycarbonate substrate having at least one surface coated with (i) a layer of a thermally dried primer composition comprising about 0.5 to about 10 parts by weight of a thermoplastic acrylic polymer in about 99.5 to about 90 parts by weight of a volatile solvent, and (ii) a layer of a cured top coat comprising a colloidal silica filled thermoset polysiloxane containing a silylated ultraviolet radiation screening compound and a small amount of a Lewis acid compound.
Claim 11
Dependent Claim
32 words
An article as defined in claim 8, wherein said volatile solvent is selected from the group consisting of ethyleneglycol diacetate, butoxyethanol, ethoxy ethanol, diacetone alcohol, hydroxyethyl acetate, cellosolve acetate, and combinations thereof.
Claim 12
Dependent Claim
14 words
An article as defined in claim 9, wherein said acrylic polymer is poly(ethyl methacrylate).
Claim 13
Dependent Claim
14 words
An article as defined in claim 9, wherein said acrylic polymer is poly(isobutyl methacrylate).
Claim 14
Dependent Claim
15 words
An article as defined in claim 8, wherein said ultraviolet radiation screening compound is 4(3-triethoxysilylpropoxy)-2-hydroxybenzophenone.
Claim 15
Dependent Claim
27 words
An article as defined in claim 8, wherein said acrylic polymer is poly(ethyl methacrylate), said volatile solvent is 2-butoxyethanol, and said ultraviolet radiation screening compound is 4(3-triethoxysilylpropoxy)-2-hydroxybenzophenone.
Claim 16
Dependent Claim
26 words
An article as defined in claim 8, wherein said Lewis acid compound is selected from the group consisting of ferric chloride, aluminum chloride and zinc chloride.
Claim 17
Dependent Claim
15 words
An article as defined in claim 13, wherein the Lewis acid compound is ferric chloride.
Claim 18
Dependent Claim
23 words
An article as defined in claim 15, wherein said ferric chloride is present in an amount to provide 10 to 30 ppm iron.
Claim 19
Dependent Claim
41 words
A thermoformable coated article comprising a polycarbonate substrate having at least one surface coated with a coating composition comprising a colloidal silica filled thermoset polysiloxane containing a silylated ultraviolet radiation screening compound and a small amount of a Lewis acid compound.
Claim 20
Dependent Claim
41 words
A thermoformable coated article comprising a polycarbonate substrate having at least one surface coated with a coating composition comprising a colloidal silica filled thermoset polysiloxane containing a silylated ultraviolet radiation screening compound and a small amount of a Lewis acid compound.
Claim 21
Dependent Claim
26 words
An article as defined in claim 17, wherein said Lewis acid compound is selected from the group consisting of ferric chloride, aluminum chloride and zinc chloride.
Claim 22
Dependent Claim
15 words
An article as defined in claim 18, wherein said Lewis acid compound is ferric chloride.
Claim 23
Dependent Claim
22 words
An article as defined in claim 19, wherein said coating composition contains sufficient ferric chloride to provide 10 to 30 ppm iron.
Claim 24
Dependent Claim
15 words
A composition as defined in claim 18, wherein said ultraviolet radiation screening compound is 4(3-triethoxysilylpropoxy)-2-hydroxybenzophenone.
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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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |