US4336309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable coating agents and process for the production of scratch-resistant coatings on plastics
Assignee: BASF SE
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Filing: 1980-11-06
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Granted: 1982-06-22
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Expires: 2000-11-06
Abstract
Abstract Curable coating agents, a process for the production of scratch-resistant coatings on plastics, and articles coated by this process. The coating agents are polycondensates of a reaction product, containing two or more carbon-carbon double bonds and one or more hydroxyl or alkoxy groups per molecule, obtained from an olefinically unsaturated silane containing 2 or more hydroxyl or alkoxy groups, whose olefinically unsaturated organic radical is bonded via a C-Si bond, and a hydroxyl-containing α, β-olefinically unsaturated monomer, an olefinically unsaturated silane of the general formula R.sup.1 --Si(OR.sup.2).sub.3 where R 1 is a vinyl radical or an alkyl acrylate or alkyl methacrylate radical bonded to the Si atom via a C--Si bond and R 2 is hydrogen or a saturated hydrocarbon radical, and a saturated silane of the general formula ##STR1## where R 3 and R 4 are saturated or aromatic hydrocarbon radicals, with or without an epoxide-containing silane which also contains hydroxyl or alkoxy groups; the polycondensate may additionally contain an olefinically unsaturated reaction product of acrylic or methacrylic acid and a polyalcohol or polyether-ol. The coating agent is used to produce scratch-resistant coatings on the surface of plastics.
Inventors
- 👤 Klaus-Peter Jackel
- 👤 Gunter Heil
- 👤 Herbert Spoor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:50
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/06; C08G; C08G77/00; C08G77/04; C08G77/20; C09; C09D; C09D183/00; C09D183/04; C09D183/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
223 words
A curable coating agent based on an olefinically unsaturated polysiloxane, wherein the olefinically unsaturated polysiloxane is a polycondensate of (a) from 1 to 40% by weight of a reaction product containing two or more carbon-carbon double bonds and one or more hydroxyl and/or alkoxy groups per molecule, obtained from an olefinically unsaturated silane containing 2 or more hydroxyl or C 1 -C 4 -alkoxy groups, whose olefinically unsaturated organic radical is bonded via a C--Si bond, and a hydroxyl-containing α,β-olefinically unsaturated monomer, (b) from 20 to 80% by weight of an olefinically unsaturated silane of the general formula R.sup.1 --Si(OR.sup.2).sub.3 where R 1 is a vinyl or C 2 -C 8 -alkyl acrylate or methacrylate radical bonded to the Si atom via a C--Si bond and R 2 is hydrogen or a saturated hydrocarbon radical of 1 to 4 carbon atoms, (c) from 5 to 55% by weight of a saturated silane of the general formula ##STR5## where R 2 has the above meanings and R 3 and R 4 are identical or different and each is a saturated hydrocarbon radical of 1 to 6 carbon atoms or an unsubstituted or C 1 -C 4 -alkyl-substituted aromatic hydrocarbon radical, and (d) from 0 to 30% by weight of an epoxide-containing silane containing 2 or more hydroxyl or C 1 -C 4 -alkoxy groups.
Claim 2
Dependent Claim
223 words
A curable coating agent based on an olefinically unsaturated polysiloxane, wherein the olefinically unsaturated polysiloxane is a polycondensate of (a) from 1 to 40% by weight of a reaction product containing two or more carbon-carbon double bonds and one or more hydroxyl and/or alkoxy groups per molecule, obtained from an olefinically unsaturated silane containing 2 or more hydroxyl or C 1 -C 4 -alkoxy groups, whose olefinically unsaturated organic radical is bonded via a C--Si bond, and a hydroxyl-containing α,β-olefinically unsaturated monomer, (b) from 20 to 80% by weight of an olefinically unsaturated silane of the general formula R.sup.1 --Si(OR.sup.2).sub.3 where R 1 is a vinyl or C 2 -C 8 -alkyl acrylate or methacrylate radical bonded to the Si atom via a C--Si bond and R 2 is hydrogen or a saturated hydrocarbon radical of 1 to 4 carbon atoms, (c) from 5 to 55% by weight of a saturated silane of the general formula ##STR5## where R 2 has the above meanings and R 3 and R 4 are identical or different and each is a saturated hydrocarbon radical of 1 to 6 carbon atoms or an unsubstituted or C 1 -C 4 -alkyl-substituted aromatic hydrocarbon radical, and (d) from 0 to 30% by weight of an epoxide-containing silane containing 2 or more hydroxyl or C 1 -C 4 -alkoxy groups.
Claim 3
Dependent Claim
45 words
A curable coating agent as claimed in claim 1, which additionally contains an olefinically unsaturated reaction product of acrylic acid or methacrylic acid and a polyalcohol of polyether-ol, in an amount of up to 800 percent by weight, based on the weight of the polycondensate.
Claim 4
Dependent Claim
68 words
A process for producing a scratch-resistant coating on the surface of a plastic, wherein a curable coating agent as claimed in claim 1 is applied in a conventional manner to the surface of a plastic and is cured by ionizing radiation, by exposure to heat in the presence of a free radical initiator or initiator system, or by irradiation with ultraviolet light in the presence of conventional photoinitiators.
Claim 5
Dependent Claim
68 words
A process for producing a scratch-resistant coating on the surface of a plastic, wherein a curable coating agent as claimed in claim 2 is applied in a conventional manner to the surface of a plastic and is cured by ionizing radiation, by exposure to heat in the presence of a free radical initiator or initiator system, or by irradiation with ultraviolet light in the presence of conventional photoinitiators.
Claim 6
Dependent Claim
14 words
A plastic article coated by a process as claimed in claim 3 or 4.
References Cited (Backward Citations)
US3398210A
Cited
DE1957357U
Cited
US3453230A
Cited
DE1957358U
Cited
US3577262A
Cited
US3577263A
Cited
US3577265A
Cited
US3585065A
Cited
US3709956A
Cited
US3714288A
Cited
DE1957356C3
Cited
US3746567A
Cited
US4043953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |