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US4431774A
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Process for the curing of stoving lacquers
Assignee: Novartis Corp
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Filing: 1982-09-03
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Granted: 1984-02-14
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Expires: 2002-09-03
Abstract
Abstract Quinolinium sulfonates of the formula I ##STR1## wherein R 1 is C 1 -C 8 -alkyl, C 1 -C 4 -alkyl substituted by halogen, hydroxyl or C 1 -C 4 -alkoxy, or it is C 2 -C 8 -alkenyl, C 7 -C 9 -phenylalkyl or C 5 -C 8 -cycloalkyl, R 2 , R 3 , R 4 and R 5 independently of one another are each hydrogen, C 1 -C 4 -alkyl, halogen, --CN, --COO(C 1 -C 4 -alkyl), --CHO, hydroxyl, C 1 -C 4 -alkoxy, an acyloxy group R 7 COO--, a group R 8 --CH═CH--, C 7 -C 9 -phenylalkyl or phenyl, R 6 is C 1 -C 12 -alkyl, C 6 -C 10 -aryl which is unsubstituted or mono- or polysubstituted by C 1 -C 12 -alkyl, C 1 -C 4 -alkoxy, halogen or a group R 7 CONH--, or it is fluorine, NH 2 or CF 3 , and R 7 and R 8 independently of one another are each C 1 -C 4 -alkyl or phenyl, are suitable as latent curing catalysts for acid-curable stoving lacquers. There is formed by irradiation with UV light the actual acid catalyst, which renders possible curing at relatively low stoving temperatures.
Inventors
- 👤 Louis Felder-Schraner, deceased
- 👤 Godwin Berner
- 👤 Rudolf Kirchmayr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
215 words
A process for curing an acid-catlyzable stoving lacquer which comprises incorporating 0.1 to 10%, by weight of lacquer solids, of a latent curing catalyst into said lacquer, said catalyst comprising a quinolinium sulfonate of the formula I ##STR3## wherein R 1 is C 1 -C 8 -alkyl, C 1 -C 4 -alkyl substituted by halogen, hydroxyl or C 1 -C 4 -alkoxy, or it is C 2 -C 8 -alkenyl, C 7 -C 9 -phenylalkyl or C 5 -C 8 -cycloalkyl, R 2 , R 3 , R 4 and R 5 independently of one another are each hydrogen, C 1 -C 4 -alkyl, halogen, -CN, -COO(C 1 -C 4 -alkyl), -CHO, hydroxyl, C 1 -C 4 -alkoxy, an acyloxy group R 7 COO-, a group R 8 -CH═CH-, C 7 -C 9 -phenylalkyl or phenyl, R 6 is C 1 -C 12 -alkyl, C 6 -C 10 -aryl which is unsubstituted or mono- or polysubstituted by C 1 -C 12 -alkyl, C 1 -C 4 -alkoxy, halogen or a group R 7 CONH-, or it is fluorine, NH 2 or CF 3 , and R 7 and R 8 independently of one another are each C 1 -C 4 -alkyl or phenyl; irradiating said catalyst-containing lacquer with shortwave light; and heating said irradiated lacquer.
Claim 2
Dependent Claim
215 words
A process for curing an acid-catlyzable stoving lacquer which comprises incorporating 0.1 to 10%, by weight of lacquer solids, of a latent curing catalyst into said lacquer, said catalyst comprising a quinolinium sulfonate of the formula I ##STR3## wherein R 1 is C 1 -C 8 -alkyl, C 1 -C 4 -alkyl substituted by halogen, hydroxyl or C 1 -C 4 -alkoxy, or it is C 2 -C 8 -alkenyl, C 7 -C 9 -phenylalkyl or C 5 -C 8 -cycloalkyl, R 2 , R 3 , R 4 and R 5 independently of one another are each hydrogen, C 1 -C 4 -alkyl, halogen, -CN, -COO(C 1 -C 4 -alkyl), -CHO, hydroxyl, C 1 -C 4 -alkoxy, an acyloxy group R 7 COO-, a group R 8 -CH═CH-, C 7 -C 9 -phenylalkyl or phenyl, R 6 is C 1 -C 12 -alkyl, C 6 -C 10 -aryl which is unsubstituted or mono- or polysubstituted by C 1 -C 12 -alkyl, C 1 -C 4 -alkoxy, halogen or a group R 7 CONH-, or it is fluorine, NH 2 or CF 3 , and R 7 and R 8 independently of one another are each C 1 -C 4 -alkyl or phenyl; irradiating said catalyst-containing lacquer with shortwave light; and heating said irradiated lacquer.
Claim 3
Dependent Claim
90 words
A process according to claim 1, wherein the curing catalyst is a compound of the formula I in which R 1 is C 1 -C 4 -alkyl, R 2 and R 4 independently of one another are each hydrogen, C 1 -C 4 -alkyl, halogen, -COOCH 3 , -OCH 3 , -CN or -CHO, R 3 and R 5 are each hydrogen, and R 6 is C 6 -C 10 -aryl which is unsubstituted or substituted by C 1 -C 4 -alkyl or halogen, or it is CF 3 .
Claim 4
Dependent Claim
12 words
A process according to claim 1, wherein the curing catalyst is 1-methylquinolinium-p-toluenesulfonate.
Claim 5
Dependent Claim
17 words
A process according to claim 1, wherein the lacquer is irradiated with UV light before being heated.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the irradiated lacquer is cured at temperatures of 70° to 120° C.
Claim 7
Dependent Claim
48 words
A lacquer based on acid-curable lacquer resins, which lacquer is curable by irradiation with shortwave light and subsequent heating, and which comprises said lacquer resins and 0.1 to 10% by weight, based on solvent-free lacquer resin, of a latent curing catalyst of the formula I of claim 1.
Claim 8
Dependent Claim
22 words
A lacquer according to claim 6, which contains 0.5 to 3% by weight, of curing catalyst, relative to the solvent-free lacquer resin.
Claim 9
Dependent Claim
26 words
A lacquer according to claim 6, which contains, in addition to the latent curing catalyst, a pigment or some other additive customarily used in lacquer technology.
Claim 10
Dependent Claim
17 words
A lacquer according to claim 6, which contains, in addition to the latent curing catalyst, a sensitiser.
References Cited (Backward Citations)
US3474054A
Cited
US4200729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-02-13 | 1987-08-15 | 1988-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-13 | 1991-08-15 | 1992-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-13 | 1995-08-15 | 1996-02-14 | $7700.00 | Window Closed / Lapsed |