Patent US2644382A successfully refreshed from Google Patents.
Patent US4510284A successfully refreshed from Google Patents.
US4510284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High solids baking finishes
Assignee: BASF SE
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Filing: 1984-08-07
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Granted: 1985-04-09
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Expires: 2004-08-07
Abstract
Abstract Baking finishes having a high solids content contain, as the binder, a copolymer of one or more mono-acrylate or monomethacrylate of an alkanediol, an ester of acrylic or methacrylic acid whose homopolymer has a glass transition temperature of below -40 DEG C., an ester of acrylic acid or methacrylic acid whose homopolymer has a glass transition temperature of above 35 DEG C. and acrylic acid or methacrylic acid, which copolymer has a Fikentscher K value of from 13 to 17 and may or may not be used in combination with conventional aminoplast precondensates having a crosslinking action. These baking finishes are particularly useful as binders for automotive finishes.
Inventors
- 👤 Jurgen Gimpel
- 👤 Klaus-Peter Jackel
- 👤 Hans Sander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:12
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/066; C08; C08L; C08L61/00; C08L61/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
160 words
A baking finish dissolved in conventional organic solvents, which baking finish is based on hydroxyl-containing copolymers and is useful as a top coat for multilayer coatings, wherein the binder of said finish is a copolymer obtained from (A) from 18 to 27% by weight of one or more monoacrylate or monomethacrylate of an alkanediol of 2 to 4 carbon atoms, (B) from 28 to 45% by weight of an acrylate or methacrylate of a monoalcohol of 3 to 8 carbon atoms, the homopolymer of which ester has a glass transition temperature of below -40° C., (C) from 32 to 50% by weight of an acrylate or methacrylate whose homopolymer has a glass transition temperature of above 35° C. and (D) from 0.5 to 3% by weight of acrylic or methacrylic acid, with the proviso that the sum of the percentages given under (A) to (D) is 100 and the Fikentscher K value of the copolymer is from 13 to 17.
Claim 2
Dependent Claim
160 words
A baking finish dissolved in conventional organic solvents, which baking finish is based on hydroxyl-containing copolymers and is useful as a top coat for multilayer coatings, wherein the binder of said finish is a copolymer obtained from (A) from 18 to 27% by weight of one or more monoacrylate or monomethacrylate of an alkanediol of 2 to 4 carbon atoms, (B) from 28 to 45% by weight of an acrylate or methacrylate of a monoalcohol of 3 to 8 carbon atoms, the homopolymer of which ester has a glass transition temperature of below -40° C., (C) from 32 to 50% by weight of an acrylate or methacrylate whose homopolymer has a glass transition temperature of above 35° C. and (D) from 0.5 to 3% by weight of acrylic or methacrylic acid, with the proviso that the sum of the percentages given under (A) to (D) is 100 and the Fikentscher K value of the copolymer is from 13 to 17.
Claim 3
Dependent Claim
18 words
The baking finish of claim 1, wherein component (A) in the copolymer is hydroxyethyl acrylate or hydroxypropyl acrylate.
Claim 4
Dependent Claim
18 words
The baking finish of claim 1, wherein component (B) in the copolymer is n-butyl acrylate or 2-ethylhexyl acrylate.
Claim 5
Dependent Claim
20 words
The baking finish of claim 1, wherein components (C) in the copolymer is tert.-butyl acrylate, methyl methacrylate or ethyl methacrylate.
Claim 6
Dependent Claim
25 words
The baking finish of claim 1, which contains from 10 to 40% by weight, based on copolymer, of an aminoplast precondensate having a crosslinking action.
Claim 7
Dependent Claim
16 words
The baking finish of claim 1, wherein the copolymer used has been prepared by solution polymerization.
Claim 8
Dependent Claim
18 words
The baking finish of claim 2, wherein component (B) in the copolymer is n-butyl acrylate or 2-ethylhexyl acrylate.
Claim 9
Dependent Claim
20 words
The baking finish of claim 2, wherein component (C) in the copolymer is tert.-butyl acrylate, methyl methacrylate or ethyl methacrylate.
Claim 10
Dependent Claim
20 words
The baking finish of claim 3, wherein component (C) in the copolymer is tert.-butyl acrylate, methyl methacrylate or ethyl methacrylate.
Claim 11
Dependent Claim
20 words
The baking finish of claim 3, wherein component (C) in the copolymer is tert.-butyl acrylate, methyl methacrylate or ethyl methacrylate.
Claim 12
Dependent Claim
19 words
The baking finish of claim 1, wherein the Fikentscher K value of the copolymers is from 13 to 15.
Claim 13
Dependent Claim
25 words
A solvent solution of the baking finish of claim 1, wherein the solvent is an alcohol, aromatic, ester, ether-ester or a mixture of said solvents.
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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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |