US4482698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting coating composition containing a blocked acid as catalyst
Assignee: Akzo NV
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Filing: 1983-08-08
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Granted: 1984-11-13
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Expires: 2003-08-08
Abstract
Abstract A thermosetting coating composition containing 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. The blocked acid used is an O-sulphonyl hydroxamic ester of the formula [RSO2ONHCOO]nA, wherein n represents an integer from 1 to 5 and R and A are organic groups. The new blocked acids are better soluble in the current solvents used in these coating compositions. The compositions may be used advantageously for coating a substrate by electrostatic spraying.
Inventors
- 👤 Johan B. Reesink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:05
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; C09; C09D; C09D161/00; C09D161/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 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, characterized in that the blocked acid is an O-sulphonyl hydroxamic ester of the formula: [RSO 2 ONHCOO] n A, wherein n represents an integer from 1 to 5 and A, when n=1, has the meaning of a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or heterocyclic group or when n=2 to 5 has the meaning of substituted or unsubstituted alkylene, cycloalkylene, arylene or alkarylene group and R represents a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl or heterocyclic group.
Claim 2
Dependent Claim
115 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, characterized in that the blocked acid is an O-sulphonyl hydroxamic ester of the formula: [RSO 2 ONHCOO] n A, wherein n represents an integer from 1 to 5 and A, when n=1, has the meaning of a substituted or unsubstituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl or heterocyclic group or when n=2 to 5 has the meaning of substituted or unsubstituted alkylene, cycloalkylene, arylene or alkarylene group and R represents a substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl or heterocyclic group.
Claim 3
Dependent Claim
29 words
The coating composition of claim 1, wherein A represents a group having not more than 20 carbon atoms and R a group having not more than 35 carbon atoms.
Claim 4
Dependent Claim
50 words
The coating composition of claim 1 or 2, wherein n=1, and A represents an alkyl group or aralkyl group having not more than 10 carbon atoms and R a lower alkyl group or a phenyl group substituted or not with an alkyl group having not more than 20 carbon atoms.
Claim 5
Dependent Claim
21 words
The coating composition of claim 1 or 2, wherein n=2, and A is (CH 2 ) m with m=2 to 10.
Claim 6
Dependent Claim
16 words
The coating composition of claim 3, wherein the blocked acid is O-methanesulphonyl ethoxyhydroxamate or O-p-toluenesulphonyl ethoxyhydroxamate.
Claim 7
Dependent Claim
16 words
The coating composition of claim 3, wherein the blocked acid is O-methanesulphonyl benzyloxyhydroxamate or O-p-toluenesulphonyl benzyloxyhydroxamate.
Claim 8
Dependent Claim
22 words
The coating composition of claim 1, wherein the blocked acid is ethylene dioxy bis(O-methane sulphonyl hydroxamate) or ethylene dioxy bis(O-p-toluene sulphonyl hydroxamate).
Claim 9
Dependent Claim
18 words
The coating composition of claim 1, 2, 3, 4, 5, 6 or 7, which also contains an amine.
Claim 10
Dependent Claim
29 words
The coating composition of claim 8, wherein the weight ratio between the blocked acid and the amine is between 0,02 and 0,15% by weight, calculated on the coating composition.
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) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |