Polyeste composition and method of producing the same

Patent metadata

Field	Value
Publication number	US-9828522-B2
Application number	US-201314391181-A
Country	US
Kind code	B2
Filing date	Apr 18, 2013
Priority date	May 9, 2012
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

The instant invention provides a polyester composition, method of producing the same, coating compositions made therefrom, and coating layers made from such coatings. The thermoset polyester composition according to the present inventions comprises the reaction product of: (a) one or more polyacids comprising at least 50 percent by the combined weight of one or more aromatic diacids; and (b) one or more polyols comprising at least 40 percent by the combined weight of 1,4-cyclohexanedimethanol and 2,2,4,4-tetramethylcyclobutanediol; wherein said polyester composition has a glass transition temperature in the range of from 70 to 125° C., a number average molecular weight between 6,000 and 20,000, a hydroxyl number in the range of from 4 to 18.

First claim

We claim:

1. A polyester composition comprising a polyester polymer comprising the reaction product of: one or more polyacids which comprise at least 50 weight percent one or more aromatic diacids based on the total weight of the one or more polyacids; and one or more polyols which comprise from 20 to 30 weight percent of 1,4-cyclohexanedimethanol based on the total weight of the one or more polyols and from 30 to 50 weight percent 2,2,4,4-tetramethylcyclobutanediol based on the total weight of the one or more polyols; wherein said polyester polymer has a glass transition temperature in the range of from 80 to 120° C., a number average molecular weight between 8,000 and 15,000, a hydroxyl number in the range of from 7 to 16 mgKOH/g.

2. A method for producing a polyester polymer of claim 1 comprising: selecting one or more polyacids comprising at least 50 percent by the combined weight of one or more aromatic diacids; selecting one or more polyols comprising from 20 to 30 weight percent of 1,4-cyclohexanedimethanol based on the total weight of the one or more polyols and from 30 to 50 weight percent 2,2,4,4-tetramethylcyclobutanediol based on the total weight of the one or more polyols; contacting said one or more polyacids and one or more polyols in the presence of heat; and thereby forming said polyester polymer.

3. A coating composition comprising the polyester composition of claim 1 and one or more crosslinking agents.

4. An aqueous dispersion comprising the polyester composition of claim 1 .

5. A solution mixture comprising the polyester composition of claim 1 and one or more solvents.

6. A coating layer derived from the coating composition of claim 3 .

7. A coated substrate comprising a substrate and the coating composition of claim 3 associated with at least one surface of said substrate.

Assignees

• Dow Global Technologies Llc
• Eastman Chem Co

Inventors

• Argyropoulos John N
• Spilman Gary E
• Stants Cynthia
• Kainz Bernhard

Classifications

• C08G63/199 Primary

  Acids or hydroxy compounds containing cycloaliphatic rings · CPC title

• C09D167/02 Primary

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C09D167/06 takes precedence) · CPC title

• C08G63/20

  Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups · CPC title

• C08G63/181

  Acids containing aromatic rings · CPC title

• C09D167/00 Primary

  Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09D177/12; based on polyester-imides C09D179/08); Coating compositions based on derivatives of such polymers · CPC title