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US 2004/0110907 A1Published application
Powder coating compositions for coatings with a matt apperance
AssigneeDegusa AG
InventorsJoern Volker Weiss, Werner Grenda
Life of this patent
Estimating the term…
Abstract
Powder coating compositions based on carboxyl- and/or hydroxyl-containing polyesters, crosslinkers, and other customary additives for coatings having a matt appearance and methods for providing coatings having a matt appearance.
Claims22
A powder coating composition comprising
- A) one or more crosslinkers
- and
- B) one or more polyesters containing one or more COOH groups, OH groups, or both COOH and OH groups, wherein the polyester comprises
- B1) from 10 to 80% by weight of at least one amorphous polyester based on the total weight of the polyester,
- B2) from 20 to 90% by weight, based on the total weight of the polyester, of at least one (semi)crystalline polyester comprising polymerized units of from 50 to 100 mol % of at least one of succinic acid, adipic acid, sebacic acid or dodecanedioic acid, anhydride or ester thereof, and from 50 to 100 mol % of at least one of monoethylene glycol, butane-1,4-diol or hexane-1,6-diol,
- wherein the polyester has an OH number of from 0 to 200 mg KOH/g and a COOH number of from 0 to 150 mg KOH/g, wherein at least one of the COOH number or OH number is greater than zero, and from 0.6 to 1.2 reactive groups of the crosslinker is present per functional group of the polyester.
3 more elements
A method comprising:
- applying one or more polyester powder coating materials on a substrate to form a coating with a matt appearance,
- wherein the polyester powder coating material comprises:
- A) one or more crosslinkers
- and
- B) one or more polyesters containing one or more COOH groups, OH groups, or both COOH and OH groups, wherein the polyester comprises
- B1) from 10 to 80% by weight of at least one amorphous polyester based on the total weight of the polyester,
- B2) from 20 to 90% by weight, based on the total weight of the polyester, of at least one (semi)crystalline polyester comprising polymerized units of from 50 to 100 mol % of at least one of succinic acid, adipic acid, sebacic acid or dodecanedioic acid, anhydride or ester thereof, and from 50 to 100 mol % of at least one of monoethylene glycol, butane-1,4-diol or hexane-1,6-diol, and
- wherein the polyester has an OH number of from 0 to 200 mg KOH/g and a COOH number of from 0 to 150 mg KOH/g, wherein at least one of the COOH number or OH number is greater than zero, and from 0.6 to 1.2 reactive groups of the crosslinker is present per functional group of the polyester.
5 more elements
Dependencies are inferred from the claim text.