US3948834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder coating agents
Assignee: BASF SE
•
Filing: 1973-08-28
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Granted: 1976-04-06
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Expires: 1993-08-28
Abstract
Abstract A pulverulent coating agent which consists of a mixture of: A. a compound having at least two aziridine ring groupings per molecule; B a binder which contains hydroxyl groups and which is solid at ambient temperature; and optionally C one or more other additives. The coating agent is particularly suitable for powder coating metal surfaces.
Inventors
- 👤 Otto Brussmann
- 👤 Felix Miksovsky
- 👤 Rolf Fikentscher
- 👤 Horst Diefenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:51
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C08; C08G; C08G63/00; C08G63/91; C08G63/914; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/066; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A powder coating agent which comprises a mixture of A. at least one compound of the formula: ##EQU16## in which n is one of the integers from 2 to 6, X is one of the groupings --NHCO--, --CO--, SO 2 -- or --O--CO-- and A is alkyl, aryl, aralkyl, or a cycloaliphatic or heterocyclic radical whose valence is equal to n; and B. a binder which is solid at ambient temperature and which contains hydroxyl groups, said binder being an acrylate resin having a hydroxyl number of from 30 to 250 based on an ester of acrylic and/or methacrylic acid with an alcohol of one to eight carbon atoms, said component A being contained in the mixture in an amount of from 1 to 50% by weight based on the sum of the components (A) + (B); said coating being designed to be applied to a surface by electrostatic powder spray or fluidized bed coating techniques.
Claim 2
Dependent Claim
156 words
A powder coating agent which comprises a mixture of A. at least one compound of the formula: ##EQU16## in which n is one of the integers from 2 to 6, X is one of the groupings --NHCO--, --CO--, SO 2 -- or --O--CO-- and A is alkyl, aryl, aralkyl, or a cycloaliphatic or heterocyclic radical whose valence is equal to n; and B. a binder which is solid at ambient temperature and which contains hydroxyl groups, said binder being an acrylate resin having a hydroxyl number of from 30 to 250 based on an ester of acrylic and/or methacrylic acid with an alcohol of one to eight carbon atoms, said component A being contained in the mixture in an amount of from 1 to 50% by weight based on the sum of the components (A) + (B); said coating being designed to be applied to a surface by electrostatic powder spray or fluidized bed coating techniques.
Claim 3
Dependent Claim
37 words
A powder coating agent as claimed in claim 1 wherein component (A) and component (B) are combined with each other in such amounts that the aziridine groups and the hydroxyl groups are present in about equivalent amounts.
Claim 4
Dependent Claim
21 words
A powder coating agent as claimed in claim 1 wherein component (B) has a hydroxyl number of from 50 to 200.
Claim 5
Dependent Claim
36 words
A powder coating agent as claimed in claim 1 wherein component (B) contains in addition to the hydroxyl groups at least one other reactive group from the group consisting of carboxyl, epoxide, amide and SH groups.
Claim 6
Dependent Claim
42 words
A powder coating agent as claimed in claim 1 which contains as component (C) at least one substance from the group consisting of inorganic pigments, organic pigments, fillers, flow improvers, curing catalysts, solvents, natural coating agent resins and synthetic coating agent resins.
Claim 7
Dependent Claim
33 words
A powder coating agent as claimed in claim 1 wherein component (B) is a copolymer of styrene, methyl methacrylate, butyl acrylate, and a monoester of acrylic or methacrylic acid with a dihydric alcohol.
Claim 8
Dependent Claim
12 words
A coating obtained from a coating agent as claimed in claim 1.
Claim 9
Dependent Claim
12 words
A coating obtained from a coating agent as claimed in claim 5.
References Cited (Backward Citations)
US3198770A
Cited
US3458485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |