Patent US3782932A successfully refreshed from Google Patents.
US4424239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid coating composition for metal surfaces, and a process for coating them with such a coating composition
Assignee: ASTRAL PENINTURES ET VERNIS Ste
•
Filing: 1982-12-23
•
Granted: 1984-01-03
•
Expires: 2002-12-23
Abstract
Abstract The invention provides for a coating composition for metal surfaces wherein the binder is made up of (A) 10-80% by weight of a solid, powdered polyamide having a softening point of 110°-230° C. and an average particle size of 0.5-200 μ m, (B) 20-90% by weight of a hydroxyl groups-containing polymer having a number average molecular weight of 800-20,000 and a hydroxyl functionality of 1.5-6, and the composition also contains a cross-linking agent for component B in an amount such that the molar ratio of the reactive groups of the cross-linking agent to that of component B is 0.6-1.5, and 40-60% by weight of an organic solvent for component B, the boiling point thereof being 140°-310° C. The invention also relates to a process for coating a metal surface using said coating composition.
Inventors
- 👤 Gabriel H. A. Nota
- 👤 Anton Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:46
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/46; C08G63/60; C09; C09D; C09D167/00; C09D177/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
138 words
A liquid coating composition for metal surfaces, characterized in that it comprises a binder which is made up of 10-80% by weight of a solid, powdered polyamide having a softening point of 110°-230° C. and an average particle size of 0.5-200 μm, and 20-90% by weight of a hydroxyl groups-containing polymer having a number average molecular weight of 800 to 20 000 and a hydroxyl functionality of 1.5-6, and the composition also contains a cross-linking agent for the hydroxyl groups-containing polymer in an amount such that the molar ratio of the reactive groups of the cross-linking agent to that of the hydroxyl groups-containing polymer is in the range of 0.6 to 1.5, and the composition contains 40-60% by weight of an organic solvent for the hydroxyl groups-containing polymer, which organic solvent has a boiling point of 140°-310° C.
Claim 2
Dependent Claim
138 words
A liquid coating composition for metal surfaces, characterized in that it comprises a binder which is made up of 10-80% by weight of a solid, powdered polyamide having a softening point of 110°-230° C. and an average particle size of 0.5-200 μm, and 20-90% by weight of a hydroxyl groups-containing polymer having a number average molecular weight of 800 to 20 000 and a hydroxyl functionality of 1.5-6, and the composition also contains a cross-linking agent for the hydroxyl groups-containing polymer in an amount such that the molar ratio of the reactive groups of the cross-linking agent to that of the hydroxyl groups-containing polymer is in the range of 0.6 to 1.5, and the composition contains 40-60% by weight of an organic solvent for the hydroxyl groups-containing polymer, which organic solvent has a boiling point of 140°-310° C.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the polyamide is a polylauryl lactam or a copolyamide of caprolactam and lauryl lactam.
Claim 4
Dependent Claim
14 words
The composition of claim 1, wherein the polyamide has an amine number of 0-5.
Claim 5
Dependent Claim
15 words
The composition of claim 1, wherein the polyamide has a softening point of 110°-230° C.
Claim 6
Dependent Claim
15 words
The composition of claim 1, wherein the polyamide has a softening point of 120°-210° C.
Claim 7
Dependent Claim
15 words
The composition of claim 1, wherein the polyamide forms 25-65% by weight of the binder.
Claim 8
Dependent Claim
14 words
The composition of claim 1, wherein the hydroxyl groups-containing polymer is a polyester resin.
Claim 9
Dependent Claim
21 words
The composition of claim 1, wherein the polyester resin is partly built up of diols and/or triols having 2-12 carbon atoms.
Claim 10
Dependent Claim
22 words
The composition of claim 1, wherein the polyester resin is partly built up of a diol and/or triol having 2-8 carbon atoms.
Claim 11
Dependent Claim
26 words
The composition of claim 1, wherein the polyester resin is partly built up of a (cyclo)aliphatic or aromatic di- or tricarboxylic acid having 4-10 carbon atoms.
Claim 12
Dependent Claim
14 words
The composition of claim 1, wherein the polyester resin is a silicium-containing polyester resin.
Claim 13
Dependent Claim
53 words
The composition of claim 1, wherein the polyester resin is partly built up of a compound of the general formula: SiR.sub.1 (OR.sub.2).sub.3, Si(R.sub.1).sub.2 (OR.sub.2).sub.2, Si(R.sub.1).sub.3 OR.sub.2 or R.sub.1 Si(OR.sub.2).sub.2 OSi(R.sub.1).sub.2 OSi(R.sub.1).sub.2 OR.sub.2 where R 1 represents a hydrocarbon group having 1-8 carbon atoms, and R 2 an alkyl group having 1-4 carbon atoms.
Claim 14
Dependent Claim
15 words
The composition of claim 1, wherein the polyester resin has an acid number of 0-70.
Claim 15
Dependent Claim
15 words
The composition of claim 1, wherein the polyester resin has an acid number of 0-35.
Claim 16
Dependent Claim
19 words
The composition of claim 1, wherein the polyester resin has a number average molecular weight of 1 000-10 000.
Claim 17
Dependent Claim
15 words
The composition of claim 1, wherein the polyester resin has a hydroxyl functionality of 1.8-5.
Claim 18
Dependent Claim
17 words
The composition of claim 1, wherein the binder includes 35-75% by weight of a hydroxyl groups-containing polymer.
Claim 19
Dependent Claim
23 words
The composition of claim 1, wherein the crosslinking agent for the hydroxyl groups-containing polymer is an N-methylol groups- and/or N-methylol ether groups-containing aminoplast.
Claim 20
Dependent Claim
37 words
The composition of claim 1, wherein the cross-linking agent for the hydroxyl groups-containing polymer is an N-methylol groups- and/or N-methylol ether groups-containing aminoplast obtained by reaction of an aldehyde with an amino groups- or amido groups-containing compound.
Claim 21
Dependent Claim
43 words
The composition of claim 1, wherein the cross-linking agent for the hydroxyl groups-containing polymer is a methylol melamine having 4 to 6 methylol groups per molecule of melamine, at least 3 methylol groups being etherified with methanol, ethanol, a propanol or a butanol.
Claim 22
Dependent Claim
172 words
A process for coating a metal surface with a liquid coating composition comprising a binder which is made up of 10-80% by weight of a solid, powdered polyamide having a softening point of 110° to 230° C. and an average particle size of 0.5 to 200 μm, and 20-90% by weight of a hydroxyl groups-containing polymer having a number average molecular weight of 800 to 20 000 and a hydroxyl functionality of 1.5-6, and the composition also contains a cross-linking agent for the hydroxyl groups-containing polymer in such an amount that the molar ratio of the reactive groups of the cross-linking agent to that of the hydroxyl groups-containing polymer is in the range of 0.6-1.5, and the composition contains 40-60% by weight of organic solvent for the hydroxyl groups-containing polymer, having a boiling point of 140°-310° C. which coating composition is applied to the metal surface and cured at a temperature of the metal above the softening point of the polyamide and in the range of about 200° to about 280° C.
Claim 23
Dependent Claim
172 words
A process for coating a metal surface with a liquid coating composition comprising a binder which is made up of 10-80% by weight of a solid, powdered polyamide having a softening point of 110° to 230° C. and an average particle size of 0.5 to 200 μm, and 20-90% by weight of a hydroxyl groups-containing polymer having a number average molecular weight of 800 to 20 000 and a hydroxyl functionality of 1.5-6, and the composition also contains a cross-linking agent for the hydroxyl groups-containing polymer in such an amount that the molar ratio of the reactive groups of the cross-linking agent to that of the hydroxyl groups-containing polymer is in the range of 0.6-1.5, and the composition contains 40-60% by weight of organic solvent for the hydroxyl groups-containing polymer, having a boiling point of 140°-310° C. which coating composition is applied to the metal surface and cured at a temperature of the metal above the softening point of the polyamide and in the range of about 200° to about 280° C.
Claim 24
Dependent Claim
20 words
The process of claim 21, wherein the polyamide is a polylauryl lactam or a copolyamide of caprolactam and lauryl lactam.
Claim 25
Dependent Claim
18 words
The process of claim 21, wherein the polyamide has a softening point in the range of 110°-230° C.
Claim 26
Dependent Claim
15 words
The process of claim 21, wherein the polyamide forms 25-65% by weight of the binder.
Claim 27
Dependent Claim
14 words
The process of claim 21, wherein the hydroxyl groups-containing polymer is a polyester resin.
Claim 28
Dependent Claim
14 words
The process of claim 21, wherein the polyester resin is a silicium-containing polyester resin.
Claim 29
Dependent Claim
23 words
The process of claim 21, wherein the crosslinking agent of the hydroxyl groups-containing polymer is an N-methylol groups- and/or N-methylol ether groups-containing aminoplast.
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) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |