US3947528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additives for powder resins
Assignee: Bayer AG
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Filing: 1974-05-16
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Granted: 1976-03-30
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Expires: 1994-05-16
Abstract
Abstract Copolymers of (meth)acrylates and α,β-monoolefinically unsaturated carboxylic acid having 3 to 5 carbon atoms are used as additives for improving levelling, glass and reactivity in powder lacquers. Said powder lacquers contain polymerized units of at least 35% by weight of styrene and (meth)acrylate and 5 to 30% by weight of at least one monomer containing a hydroxyl, carboxyl, glycidyl, N-methylol or N-methylol ether group. The powder lacquer mixture contains 0.1 to 5% by weight of the additive.
Inventors
- 👤 Frank Wingler
- 👤 Richard Muller
- 👤 Dieter Pollheide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1808; C08L; C08L33/00; C08L33/04; C08L33/06; C08L33/062; C08L33/064; C08L33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A powdered solvent-free composition comprising from 0.1 to 5% by weight of a solvent-free copolymer having an average molecular weight of from 1,000 to 10,000 and a viscosity of from 1 to 1,000 poises at 100°C., said copolymer comprising copolymerized units of: I. from 1 to 20 parts by weight of an α,β -monoolefinically unsaturated carboxylic acid having from 3 to 5 carbon atoms; Ii. from 0 to 50 parts by weight of an ester of acrylic acid or methacrylic acid having from 1 to 4 carbon atoms in the alcohol radical and Iii. from 30 to 99 parts by weight of an ester of acrylic or methacrylic acid having from 5 to 20 carbon atoms in the ester alcohol, and from 95 to 99.9% by weight of a solvent-free copolymer, said copolymer comprising copolymerized units of: A. from 25 to 60% by weight of styrene; B. from 10 to 70% by weight of at least one ester of acrylic acid or methacrylic acid and C. from 5 to 30% by weight of N-methylolalkyl ether of acrylic acid amide having from 1 to 4 carbon atoms in the alkyl ether moiety, N-methylolalkyl ether of methacrylic acid amide having from 1 to 4 carbon atoms in the alkyl ether moiety or a mixture thereof.
Claim 2
Dependent Claim
213 words
A powdered solvent-free composition comprising from 0.1 to 5% by weight of a solvent-free copolymer having an average molecular weight of from 1,000 to 10,000 and a viscosity of from 1 to 1,000 poises at 100°C., said copolymer comprising copolymerized units of: I. from 1 to 20 parts by weight of an α,β -monoolefinically unsaturated carboxylic acid having from 3 to 5 carbon atoms; Ii. from 0 to 50 parts by weight of an ester of acrylic acid or methacrylic acid having from 1 to 4 carbon atoms in the alcohol radical and Iii. from 30 to 99 parts by weight of an ester of acrylic or methacrylic acid having from 5 to 20 carbon atoms in the ester alcohol, and from 95 to 99.9% by weight of a solvent-free copolymer, said copolymer comprising copolymerized units of: A. from 25 to 60% by weight of styrene; B. from 10 to 70% by weight of at least one ester of acrylic acid or methacrylic acid and C. from 5 to 30% by weight of N-methylolalkyl ether of acrylic acid amide having from 1 to 4 carbon atoms in the alkyl ether moiety, N-methylolalkyl ether of methacrylic acid amide having from 1 to 4 carbon atoms in the alkyl ether moiety or a mixture thereof.
References Cited (Backward Citations)
US3551374A
Cited
US3551525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |