Methods and Materials for the Functionalization of Polymers and Coatings Including Functionalized Polymer

Patent metadata

Field	Value
Publication number	US-2017313473-A1
Application number	US-201715483082-A
Country	US
Kind code	A1
Filing date	Apr 10, 2017
Priority date	Feb 17, 2012
Publication date	Nov 2, 2017
Grant date	—

Abstract

The disclosure provides a functionalized polymer for use in coating compositions and a method for making the functionalized polymer. In some embodiments, the functionalized polymer is a water-dispersible polymer, more preferably a water-dispersible polyester polymer, having one or more side groups including one or more salt groups. Packaging containers (e.g., food or beverage cans) comprising the functionalized polymer and methods of making such containers are also provided.

First claim

What is claimed is:

1 - 20 . (canceled)

21 . A method of making a functionalized polymer comprising:
providing an unsaturated precursor polymer having a number average molecular weight of at least 2,000 and one or more double or triple bonds; and reacting in a Diels-Alder reaction, an Ene reaction, or a combination thereof: (i) an unsaturated compound having one or more functional groups with (ii) the unsaturated precursor polymer such that a covalent attachment is formed between the unsaturated compound and the unsaturated precursor polymer.

22 . The method of claim 21 , wherein the unsaturated precursor polymer is a linear or substantially linear polymer.

23 . The method of claim 21 , wherein the polymer includes a plurality of functional-group-containing side groups formed from the unsaturated compound, and wherein at least one side group was attached via a Diels-Alder reaction and at least one side group was attached via an Ene reaction.

24 . The method of claim 21 , wherein the precursor polymer comprises a polyester polymer, and wherein the one or more double or triple bonds of the unsaturated polymer is provided by one of an unsaturated diacid, an unsaturated anhydride, or an unsaturated diol reacted into a backbone of the unsaturated precursor polymer.

25 . The method of claim 21 , wherein the one or more functional group comprises an active hydrogen group, an isocyanate group, a blocked isocyanate group, a ketone group, or a mixture thereof.

26 . The method of claim 21 , wherein the one or more functional group comprises a salt or salt-forming group.

27 . The method of claim 21 , wherein the double or triple bonds of the unsaturated precursor polymer are one or more carbon-carbon double bonds and the unsaturated compound includes at least one carbon-carbon double bond.

28 . The method of claim 27 , wherein one or both of the unsaturated precursor polymer and the unsaturated compound include conjugated carbon-carbon double bonds.

29 . The method of claim 21 , further comprising forming an aqueous coating composition including the resulting functionalized polymer.

30 . The aqueous coating composition resulting from the method of claim 29 .

31 . The coating composition of claim 30 , wherein the coating composition is suitable for use in forming a food-contact coating, and wherein the coating composition includes at least 50 weight percent of the polymer based on total resin solids.

32 . The functionalized polymer resulting from the method of claim 21 .

33 . A method of making a functionalized polyester polymer comprising:
providing an unsaturated precursor polyester polymer having one or more double or triple bonds; and reacting in a Diels-Alder reaction, an Ene reaction, or a combination thereof: (i) an unsaturated compound having one or more functional groups with (ii) the unsaturated precursor polyester polymer such that a covalent attachment is formed between the unsaturated compound and the unsaturated precursor polyester polymer; wherein the one or more functional group comprises an active hydrogen group, an isocyanate group, a blocked isocyanate group, a ketone group, or a mixture thereof.

34 . The method of claim 33 , wherein the unsaturated precursor polyester polymer has a number average molecular weight of at least 4,000.

35 . The method of claim 33 , wherein one or both of the unsaturated precursor polyester polymer and the unsaturated compound include conjugated carbon-carbon double bonds.

36 . The method of claim 33 , wherein the unsaturated compound comprises sorbic acid or neutralized sorbic acid.

37 . The method of claim 33 , wherein the functionalized polyester polymer resulting from the method has a glass transition temperature of at least 25° C.

38 . The method of claim 37 , wherein the functionalized polyester polymer resulting from the method comprises a water-dispersible polymer.

39 . The method of claim 33 , wherein the functionalized polyester polymer resulting from the method includes a plurality of the side groups and at least one of the side groups is a Diels-Alder reaction product and at least one of the side groups is an Ene reaction product.

40 . The functionalized polyester polymer resulting from the method of claim 39 .

Assignees

• Valspar Sourcing Inc

Inventors

• Cavallin Carl
• Skillman Charles
• Evans Richard H
• Brandenburger Larry B
• Killilea T Howard
• O'Dell George W

Classifications

• C08G63/553

  Acids or hydroxy compounds containing cycloaliphatic rings, e.g. Diels-Alder adducts · CPC title

• C08G63/918

  Polycarboxylic acids and polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation · CPC title

• Y10T428/1355

  Elemental metal containing [e.g., substrate, foil, film, coating, etc.] · CPC title

• C09D167/06 Primary

  Unsaturated polyesters having carbon-to-carbon unsaturation · CPC title

• B65D25/14 Primary

  Linings or internal coatings (of containers made by folding or erecting blanks made of paper B65D5/56 {; linings for domestic water storage heaters F24H1/183}) · CPC title