US4668588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate molded articles having excellent weather resistance and abrasion resistance and a process for the preparation thereof
Assignee: Dainippon Plastics Co Ltd
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Filing: 1985-03-13
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Granted: 1987-05-26
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Expires: 2005-03-13
Abstract
Abstract Polycarbonate molded articles having excellent weather resistance and excellent abrasion resistance in which polycarbonate molded object is coated with an abrasion resistant cured layer comprising an ultraviolet ray setting paint, through a primer layer comprising a thermoplastic acrylic (or methacrylic) polymer containing 4-8% by weight of an ultraviolet ray absorbing agent, which are substantially transparent and particularly useful as wall materials for greenhouse, ceiling materials, partition wall materials, wall materials for sunroom, substitutes for windbreak glass and the like.
Inventors
- 👤 Yoshio Kishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:46
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/043; C08J7/0427; C08J7/046; C08J2369/00; C08J2433/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
A polycarbonate molded article having excellent weather resistance and excellent abrasion resistance in which polycarbonate molded object is coated with an abrasion resistant cured layer comprising an ultraviolet ray setting paint, through a primer layer consisting essentially of a thermoplastic acrylic or methacrylic polymer and 4-8% by weight of an ultraviolet ray absorbing agent.
Claim 2
Dependent Claim
54 words
A polycarbonate molded article having excellent weather resistance and excellent abrasion resistance in which polycarbonate molded object is coated with an abrasion resistant cured layer comprising an ultraviolet ray setting paint, through a primer layer consisting essentially of a thermoplastic acrylic or methacrylic polymer and 4-8% by weight of an ultraviolet ray absorbing agent.
Claim 3
Dependent Claim
21 words
A molded article as claimed in claim 1, wherein the primer layer has a thickness of about 10 μm or less.
Claim 4
Dependent Claim
54 words
A molded article as claimed in claim 1, wherein the thermoplastic acrylic or methacrylic polymer is selected from the following group; a polyalkyl acrylate such as polymethyl acrylate, polyethyl methacrylate, polybutyl methacrylate; or its copolymer such as methyl methacrylate/methyl acrylate copolymer, methyl methacrylate/ethyl acrylate copolymer, methyl methacrylate/butyl acrylate copolymer and methyl methacrylate/butyl acrylate/syrene copolymer.
Claim 5
Dependent Claim
53 words
A molded article as claimed in claim 1, wherein the ultraviolet ray absorbing agent is a benzophenone selected from the group consisting of 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-octoxybenzophenone; a triazole selected from the group consisting of 2-(2'-hydroxy-5'-methylphenyl)benxotriazole, and 2-(2'hydroxy-5'-t-octcylphenyl)benzotriazole; or a salicylic acid ester selected from the group consisting of phenyl salicylate and 4-t-butylphenyl salicylate.
Claim 6
Dependent Claim
25 words
A molded article as claimed in claim 1, wherein the thermoplastic acrylic or methacrylic polymer contains 5-7% by weight of the ultraviolet ray absorbing agent.
Claim 7
Dependent Claim
19 words
A molded article as claimed in claim 1, wherein the cured layer has a thickness of about 5-10 μm.
Claim 8
Dependent Claim
29 words
A molded article as claimed in claim 1, wherein the ultraviolet ray setting paint comprises a polyfunctional acrylic oligomer, a photoesensitizer, a monomer a leveling agent and a solvent.
Claim 9
Dependent Claim
36 words
A molded article as claimed in claim 7, wherein the polyfunctional acrylic oligomer is selected from the following group a polyester acrylate oligomer, polyurethane acrylate oligomer, epoxy acrylate oligomer, polyol acrylate oligomer and polyether acrylate oligomer.
Claim 10
Dependent Claim
12 words
A molded article as claimed in claim 1, which is substantially transparent.
Claim 11
Dependent Claim
37 words
A molded article as claimed in claim 1, wherein the polycarbonate molded object is in the form of sheet and its one or both surface is coated with the abrasion resistant cured layer through the primer layer.
Claim 12
Dependent Claim
85 words
A process for the preparation of polycarbonate molded articles having excellent weather resistance and abrasion resistance, in which a solution in an organic solvent of a thermoplastic acrylic or methacrylic polymer containing and 4-8% by weight of an ultraviolet ray absorbing agent is applied on the surface of a polycarbonate molded object and dried to form a primer layer, an ultraviolet ray setting paint is applied on the primer layer and dried, and then ultraviolet ray irradiation is effected to forman abrasion resistant cured layer.
Claim 13
Dependent Claim
85 words
A process for the preparation of polycarbonate molded articles having excellent weather resistance and abrasion resistance, in which a solution in an organic solvent of a thermoplastic acrylic or methacrylic polymer containing and 4-8% by weight of an ultraviolet ray absorbing agent is applied on the surface of a polycarbonate molded object and dried to form a primer layer, an ultraviolet ray setting paint is applied on the primer layer and dried, and then ultraviolet ray irradiation is effected to forman abrasion resistant cured layer.
Claim 14
Dependent Claim
20 words
A process as claimed in claim 11, wherein the primer layer has a thickness of about 10 μm or less.
Claim 15
Dependent Claim
19 words
A process as claimed in claim 11, wherein the cured layer applied has a thickness of about 5-10 μm.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |