US4351935A
Expired / Lapsed
US
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Thermosetting coating composition containing a blocked acid catalyst
Assignee: Akzo NV
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Filing: 1981-07-14
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Granted: 1982-09-28
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Expires: 2001-07-14
Abstract
Abstract A thermosetting coating composition contains an acid-curable amino resin and from 0.1 to 10 percent by weight of a blocked sulphonic acid calculated on the weight of amino resin. In order to reduce the electric conductivity of the composition after a prolonged pot-life, a sulphonic acid oximate is used as the blocked acid. The compositions are advantageous for coating a substrate by electrostatic spraying.
Inventors
- 👤 Johan B. Reesink
- 👤 Hendrik J. Hageman
- 👤 Ulfert E. Wiersum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:41
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C07; C07C; C07C309/00; C07C309/63; C09; C09D; C09D161/00; C09D161/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
A thermosetting coating composition containing an acid-curable amino resin and an amount of a blocked acid corresponding to 0.1 to 10 percent by weight, calculated on the amino resin of potentially available sulphonic acid, said blocked acid having one of the following formulae: ##STR3## p=O or 1 and q=O or 1, and R 1 is a substituted or unsubstituted alkyl group, alkenyl group, cycloalkyl group, cycloalkenyl group, aryl group, aralkyl group, aralkenyl group or heterocyclic group having not more than 20 carbon atoms; R 2 is the same as R 1 , NH 2 , CN, an alkoxy carbonyl group, cycloalkoxy carbonyl group, aroxy carbonyl group or acyl group having not more than 20 carbon atoms, or the two groups R 1 and R 2 form part of a cyclic or heterocyclic group having not more than 12 atoms in the ring; R 3 is an alkyl group, alkenyl group, cycloalkyl group, cycloalkenyl group, aryl group or heterocyclic group having not more than 30 carbon atoms and R 4 is an alkylene group, alkenylene group, cycloalkylene group, cycloalkenylene group, arylene group or bifunctional heterocyclic group having not more than 35 carbon atoms.
Claim 2
Dependent Claim
192 words
A thermosetting coating composition containing an acid-curable amino resin and an amount of a blocked acid corresponding to 0.1 to 10 percent by weight, calculated on the amino resin of potentially available sulphonic acid, said blocked acid having one of the following formulae: ##STR3## p=O or 1 and q=O or 1, and R 1 is a substituted or unsubstituted alkyl group, alkenyl group, cycloalkyl group, cycloalkenyl group, aryl group, aralkyl group, aralkenyl group or heterocyclic group having not more than 20 carbon atoms; R 2 is the same as R 1 , NH 2 , CN, an alkoxy carbonyl group, cycloalkoxy carbonyl group, aroxy carbonyl group or acyl group having not more than 20 carbon atoms, or the two groups R 1 and R 2 form part of a cyclic or heterocyclic group having not more than 12 atoms in the ring; R 3 is an alkyl group, alkenyl group, cycloalkyl group, cycloalkenyl group, aryl group or heterocyclic group having not more than 30 carbon atoms and R 4 is an alkylene group, alkenylene group, cycloalkylene group, cycloalkenylene group, arylene group or bifunctional heterocyclic group having not more than 35 carbon atoms.
Claim 3
Dependent Claim
47 words
The coating composition of claim 1, wherein p=O and q=1, R 1 and R 2 are aryl groups and, when p=1 and q=1, R 1 is an alkyl group or a cycloalkyl group and R 2 is an alkyl group, a cycloalkyl group or an aryl group.
Claim 4
Dependent Claim
41 words
The coating composition of claim 2, wherein p=O and q=1, R 1 and R 2 are phenyl groups, and when p=1 and q=1, R 1 is a lower alkyl group and R 2 is a lower alkyl group or phenyl group.
Claim 5
Dependent Claim
17 words
The coating composition of claim 1, wherein the blocked acid is a compound of the formula ##STR4##
Claim 6
Dependent Claim
17 words
The coating composition of claim 1, wherein the blocked acid is a compound of the formula ##STR5##
Claim 7
Dependent Claim
17 words
The coating compositon of claim 1, wherein the blocked acid is a compound of the formula ##STR6##
Claim 8
Dependent Claim
29 words
The coating composition of claim 1, 2, 3, 4, 5 or 6, wherein R 3 is a p-tolyl group or an alkyl group having 1 to 18 carbon atoms.
Claim 9
Dependent Claim
27 words
The coating composition of claim 1, 2, 3, 4, 5 or 6, wherein R 4 is a dialkyl naphthalene group having not more than 35 carbon atoms.
Claim 10
Dependent Claim
19 words
The coating composition of claim 8, wherein the dialkyl naphthalene group is a dinonyl or a didodecyl naphthalene group.
Claim 11
Dependent Claim
16 words
As a new article of manufacture, an article coated with the coating composition of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |