US4007299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making matt finish coatings
Assignee: Veba Oel AG
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Filing: 1975-08-21
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Granted: 1977-02-08
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Expires: 1995-08-21
Abstract
Abstract Coatings having a matt finish are made by applying a powder varnish composition to a substrate and thereafter reacting the varnish at a temperature of 100° to 240° C to form the matt finish coating. The powder varnish composition is a finely divided, particulate mixture of I. a 1,2-epoxy compound having a melting point greater than 40° C and containing at least one 1,2-epoxy group; and Ii. a salt of a polycarboxylic acid (such as pyromellite acid) containing three or more carboxyl groups and a cyclic amidine (such as 2-phenylimidazoline).
Inventors
- 👤 Felix Schulde
- 👤 Johann Obendorf
- 👤 Kurt Neubold
- 👤 Gunter Dormann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:30
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/02; C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5093; C08K; C08K5/00; C08K5/04; C08K5/09; B05D2401/00; B05D2401/30; B05D2401/32; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
Method for making matt finish coatings which comprises a. applying a powder varnish to a substrate, said powder varnish comprising a finely divided mixture of i. a 1,2-epoxy compound having at least one 1,2-epoxy group in the molecule and a lower melting point greater than 40° C; and ii. a salt of a polycarboxylic acid having three or more carboxyl groups; and a cyclic amidine having the formula ##STR3## wherein R is H, alkyl or aryl; R' is the same as R and in addition cycloalkyl, or a heterocycloalkyl radical obtained by substituting one or more --N--, --S--, and/or --O-- atoms in a cycloalkyl ring; R" is alkyl and aryl substituted alkylene or arylene; and X hydrogen or the radical ##STR4## wherein R and R" are as defined previously; and b. thereafter reacting said powder varnish at a temperature of 100° to 240° C to form a matt finish coating.
Claim 2
Dependent Claim
150 words
Method for making matt finish coatings which comprises a. applying a powder varnish to a substrate, said powder varnish comprising a finely divided mixture of i. a 1,2-epoxy compound having at least one 1,2-epoxy group in the molecule and a lower melting point greater than 40° C; and ii. a salt of a polycarboxylic acid having three or more carboxyl groups; and a cyclic amidine having the formula ##STR3## wherein R is H, alkyl or aryl; R' is the same as R and in addition cycloalkyl, or a heterocycloalkyl radical obtained by substituting one or more --N--, --S--, and/or --O-- atoms in a cycloalkyl ring; R" is alkyl and aryl substituted alkylene or arylene; and X hydrogen or the radical ##STR4## wherein R and R" are as defined previously; and b. thereafter reacting said powder varnish at a temperature of 100° to 240° C to form a matt finish coating.
Claim 3
Dependent Claim
22 words
Method of claim 1 wherein said salt is present in amounts of 2 to 15 weight percent, based on the epoxy compound.
Claim 4
Dependent Claim
25 words
Method of claim 1 wherein the polycarboxylic acid and the cyclic amidine are in a molar ratio of 1 : 1 to 1 : 4.
Claim 5
Dependent Claim
24 words
Method of claim 1 wherein the polycarboxylic acid is selected from the group of trimellite acid, pyromellite acid, butane tetracarboxylic acid and cyclo-pentanetetracarboxylic acid.
Claim 6
Dependent Claim
10 words
Method of claim 1 wherein the cyclic amidine is 2-phenylimidazoline.
Claim 7
Dependent Claim
14 words
Method of claim 1 wherein the salt of pyromellite acid and 2-phenylimidazoline is used.
Claim 8
Dependent Claim
24 words
Method of claim 1 wherein the salt is the reaction product of 1 mole of pyromellite acid with 2 or 4 moles 2-phenylimidazoline used.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |