US4246394A
Expired / Lapsed
US
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Process of hardening epoxy coating composition with dicyandiamide/imidazoline derivative
Assignee: Veba Oel AG
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Filing: 1978-05-03
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Granted: 1981-01-20
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Expires: 1998-05-03
Abstract
Abstract An improvement for producing a coating from a powder lacquers composition comprising at least one 1,2-epoxide compound having at least one 1,2-epoxide group in the molecule which compound has a lower melting point greater than 40° C., and dicyandiamide wherein the powder coating lacquer composition additionally contains an imidazoline derivative of the general structure ##STR1## wherein R is hydrogen, an alkyl or aryl residue, R' is a cycloalkyl, heterocyclo alkyl or R, R" is an alkyl or aryl substituted or unsubstituted alkylene or arylene, X is hydrogen or a radical having the following structure ##STR2##
Inventors
- 👤 Felix Schulde
- 👤 Johann Obendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:00
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; C08G59/68; C08G59/686; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
In a process for producing a coating of a powder lacquer composition wherein a powder lacquer composition is applied to a substrate, the powder lacquer composition comprising a finely particulate mixture of a 1,2-epoxide compound, which epoxide compound contains at least one 1,2-epoxide group in the molecule and has a lower melting point greater than 40° C., and dicyandiamide the improvement which comprises including in the composition at least one imidazoline derivative of the general structure ##STR5## wherein R is hydrogen, an alkyl or aryl, R' is a cycloalkyl, heterocyclo alkyl or R, R" is an alkyl or aryl substituted or unsubstituted alkylene or arylene , X is hydrogen or a radical having the following structure ##STR6## the dicyandiamide being present in excess relative to said imidazoline.
Claim 2
Dependent Claim
127 words
In a process for producing a coating of a powder lacquer composition wherein a powder lacquer composition is applied to a substrate, the powder lacquer composition comprising a finely particulate mixture of a 1,2-epoxide compound, which epoxide compound contains at least one 1,2-epoxide group in the molecule and has a lower melting point greater than 40° C., and dicyandiamide the improvement which comprises including in the composition at least one imidazoline derivative of the general structure ##STR5## wherein R is hydrogen, an alkyl or aryl, R' is a cycloalkyl, heterocyclo alkyl or R, R" is an alkyl or aryl substituted or unsubstituted alkylene or arylene , X is hydrogen or a radical having the following structure ##STR6## the dicyandiamide being present in excess relative to said imidazoline.
Claim 3
Dependent Claim
41 words
A process according to claim 1 wherein the imidazoline derivative is selected from the group consisting of 2-methyl-imidazoline, 2,4-dimethyl-imidazoline, 2-chloromethyl-imidazoline, 2-ethyl-imidazoline, 2-ethyl-4-methyl-imidazoline, 1-vinyl-2-methyl-imidazoline, 2-benzyl-imidazoline, 2-(1-naphthyl-methyl)-imidazoline, 2-phenyl-4-methyl-imidazoline, 2-(o-tolyl)-imidazoline, 2-(m-tolyl)-imidazoline, 2-(m-tolyl)-4-methyl-imidazoline, 2-(p-tolyl)-imidazoline, 2-(m-pyridyl)-imidazoline, 2-(p-pyridyl)-imidazoline, tetramethylene-bis-imidazoline, 1,4-tetramethylene-bis-(4-methyl-imidazoline-2), 1,1,3-trimethyl-1,4-tetramethylene-bis-imidazoline, 1,3,3-trimethyl-1,4-tetramethylene-bis-4-methylimidazoline, 1,2-phenylene-bis-imidazoline, 1,3-phenylene-bis-imidazoline, 1,4-phenylene-bis-imidazoline, and 1,4-phenyl-bis-4-methylimidazoline.
Claim 4
Dependent Claim
34 words
A process according to claim 1 wherein the mixture of dicyandiamide and imidazoline derivative is employed in an amount of 3.5 to 18 parts by weight per 100 parts by weight of epoxide compound.
Claim 5
Dependent Claim
34 words
A process according to claim 1 wherein the mixture of dicyandiamide and imidazoline is employed in a combined amount of 5 to 9 parts by weight per 100 parts by weight of epoxide resin.
Claim 6
Dependent Claim
22 words
A process according to claim 1 wherein the 1,2-epoxide compound is a saturated or unsaturated aliphatic, cycloaliphatic, aromatic or heterocyclic, 1,2-epoxide compound.
Claim 7
Dependent Claim
18 words
A process according to claim 1 wherein the epoxide compound is a solid polymeric polyglycidyl polyether of 2,2-bis-(4-hydroxyphenyl)-propane.
Claim 8
Dependent Claim
20 words
A process according to claim 1 wherein the 1,2-epoxide compound has an epoxide equivalent weight lying between 500 and 1000.
Claim 9
Dependent Claim
49 words
A process according to claim 1 wherein the epoxide compound is a solid epoxidized polyester of a low molecular weight polyepoxide selected from the group consisting of diglycidyl ethers of 2,2-bis-(4-hydroxyphenyl)-propane, diglycidyl phthalate, diglycidyl adipate, diglycidyl tetrahydrophthalate, diglycidyl hexahydrophthalate, diglycidyl maleate and 3,4-epoxycyclohexyl methyl ester of 3,4-epoxy-cyclohexane carboxylic acid.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein the epoxy compound is the polyglycidyl ether of 1,1,2,2-tetra-(hydroxyphenyl)-ethane.
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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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |