EP0210157A1
Expired / Lapsed
EP
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Improved thixotropic agents, thixotropic paint compositions containing them, and process for preparing the same
Assignee: TotalEnergies Onetech Belgium SA
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Filing: 1986-06-27
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Granted: —
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Expires: 2006-06-27
Abstract
Abstract Improved thixotropic agents are disclosed which are produced by the reaction of (i) xylylene or C 4 -C 8 diamine, and (ii) hydroxy-substituted C 1 -C 11 carboxylic acid (or the equivalent lactone), and (iii) polymer fatty adds. Molar ratio of (i) to (ii) is from 1:1 to 2:3, and ratio of amine groups In (i) to acid groups in (ii) + (iii) is about 1:1. Paint compositions containing them are also disclosed, as well as a process for incorporating the thixotropic agents (a) under the form of a concentrated solution (b) either into the paint, or into the hardener, or even distributed amongst the paint and the hardener.
Inventors
- 👤 Peter Van Berk
- 👤 Jozef Verborgt
- 👤 Jozef Braeken
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 03:23
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/04; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
104 words
Thixotropic agents comprising polyamides which are obtained by the reaction of ( i ) one or more diamines selected from xylylene diamine and saturated alpha-omega diprimary diamines containing 4 to 8 carbon atoms; and (ii) one or more omega hydroxy-substituted carboxylic acids of general formula HO-C n H 2n -COOH, wherein n - 1 to 11, or the equivalent lactones, the molar ratio of the carboxylic acids to the diamines ranging from 1:1 to 2:3; and (iii) polymer fatty acids, in such amount that the number of amine groups is about equal to the total number of carboxyl groups in compounds (ii) and (iii).
Claim 2
Dependent Claim
104 words
Thixotropic agents comprising polyamides which are obtained by the reaction of ( i ) one or more diamines selected from xylylene diamine and saturated alpha-omega diprimary diamines containing 4 to 8 carbon atoms; and (ii) one or more omega hydroxy-substituted carboxylic acids of general formula HO-C n H 2n -COOH, wherein n - 1 to 11, or the equivalent lactones, the molar ratio of the carboxylic acids to the diamines ranging from 1:1 to 2:3; and (iii) polymer fatty acids, in such amount that the number of amine groups is about equal to the total number of carboxyl groups in compounds (ii) and (iii).
Claim 3
Dependent Claim
22 words
Thixotropic agents according to Claim 1, wherein the diamine is selected from saturated alpha-omega diprimary diamines containing 4 to 8 carbon atoms.
Claim 4
Dependent Claim
33 words
Thixotropic agents according to Claim 1 or Claim 2.wherein in the w hydroxy-substituted carboxylic acids of general formula HO-C n N 2n -COOH or the equivalent lactones, n ranges from 3 to 5.
Claim 5
Dependent Claim
22 words
Thixotropic agents according to Claim 1, Claim 2 or Claim 3, wherein the carboxylic acid comprises 6-hydroxyhexanoic acid or the corresponding epsilon-caprolactone.
Claim 6
Dependent Claim
21 words
Thixotropic agents according to any foregoing claim, wherein the molar ratio of the carboxylic acids to the diamines is about 1:1.
Claim 7
Dependent Claim
16 words
Thixotropic agents according to any foregoing claim, wherein the polymer fatty acids comprise predominantly dimer acids.
Claim 8
Dependent Claim
80 words
Thixotropic agents comprising polyamides which are obtained by the reaction of (i) hexamethylene diamine, and (ii) 6-hydroxyhexanoic acid, or the corresponding epsilon-caprolactone, the molar ratio of the 6-hydroxyhexanoic acid or the corresponding epsilon-caprolactone to the diamine being about 1:1; and (iii) polymer fatty acids containing predominantly dimers and having an acid number of about 190 mg KOH/g, in such amount that the number-of amine groups is about equal to the total number of carboxyl groups in compounds (ii) and (iii).
Claim 9
Dependent Claim
80 words
Thixotropic agents comprising polyamides which are obtained by the reaction of (i) hexamethylene diamine, and (ii) 6-hydroxyhexanoic acid, or the corresponding epsilon-caprolactone, the molar ratio of the 6-hydroxyhexanoic acid or the corresponding epsilon-caprolactone to the diamine being about 1:1; and (iii) polymer fatty acids containing predominantly dimers and having an acid number of about 190 mg KOH/g, in such amount that the number-of amine groups is about equal to the total number of carboxyl groups in compounds (ii) and (iii).
Claim 10
Dependent Claim
15 words
Thixotropic agents comprising polyamides substantially as hereinbefore described in any one of the foregoing Examples.
Claim 11
Dependent Claim
15 words
Thixotropic agents comprising polyamides substantially as hereinbefore described in any one of the foregoing Examples.
Claim 12
Dependent Claim
71 words
Process for incorporating into paint compositions the thixotropic agents according to any one of Claims 1 to 8, the process comprising the steps of (i) dissolving the thixotropic agents according to any one of Claims 1 to 8, into a solvent which is heated to a desired temperature; and (ii) adding the solution which is obtained in dissolving step (i) to the mixture of the other components of the paint composition.
Claim 13
Dependent Claim
25 words
Process according to Claim 9, wherein before the solution is added to the mixture in step (ii), the mixture is heated to a desired temperature.
Claim 14
Dependent Claim
29 words
Process according to Claim 9 or Claim 10, further comprising the step, after dissoving step (i), of cooling down, storing and re-heating the solution obtained in dissolving step (i).
Claim 15
Dependent Claim
31 words
Process according to Claim 9, Claim 10 or Claim 11, wherein the solvent is isobutanol, benzyl alcohol, cyclohexanone, N-methylpyrrolidone, dimethylformamide, propylene glycol ether, or a mixture of any of those compounds.
Claim 16
Dependent Claim
27 words
Process according to any one of Claims 9 to 12, wherein the amount of thixotropic agents dissolved in the solvent is at least 10 % by weight.
Claim 17
Dependent Claim
21 words
Process according to Claim 13, wherein the amount of thixotropic agents dissolved in the solvent is at least 20 wt %.
Claim 18
Dependent Claim
19 words
Process for incorporating thixotropic agents in paint compositions substantially as hereinbefore described in any one of the foregoing Examples.
Claim 19
Dependent Claim
19 words
Process for incorporating thixotropic agents in paint compositions substantially as hereinbefore described in any one of the foregoing Examples.
Claim 20
Dependent Claim
32 words
Paint compositions with improved thixotropic properties containing up to 5 % by weight, based on the weight of the composition, of thixotropic agents according to any one of Claims 1 to 8.
Claim 21
Dependent Claim
28 words
Paint compositions according to Claim 16, wherein the concentration of the thixotropic agents ranges from 0.1 to 3 % by weight, based on the weight of the composition.
Claim 22
Dependent Claim
27 words
Paint composition according to Claim 16 or Claim 17, wherein the thixotropic agents are added by a process according to any one of Claims 9 to 15.
References Cited (Backward Citations)
US3224893A
Cited
US3622604A
Cited
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