Coating compositions containing a hydropyphenyl functional polymer and a latex polymer

Patent metadata

Field	Value
Publication number	US-11459478-B2
Application number	US-201816498219-A
Country	US
Kind code	B2
Filing date	Apr 3, 2018
Priority date	Apr 7, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

Coating compositions comprising a hydroxyphenyl functional polymer, a latex polymer, a cross linker, and one or more solvents, and optionally a dispersant, a lubricant and/or one or more pigments are disclosed. In some embodiments the compositions can be used to coat substrates such as cans and other packaging for food and beverages. The coating compositions of the disclosure show favorable flavor scalping properties.

First claim

We claim:

1. A coating composition comprising:
a hydroxyphenyl functional polymer, wherein the hydroxyphenyl functional polymer is a poly(hydroxystyrene);
a latex polymer; and
a crosslinker.

2. The coating composition of claim 1 , wherein the hydroxyphenyl functional polymer is functionalized with one or more functional groups selected from the group consisting of acetal, acrylate, methacrylate, aldehyde, alkyl, alkoxy, amide, aryl, carbamate, carboxylate, halogen, hydroxyalkyl, hydroxyalkyl amide, oxazoline, azlactone, hydroxyl, isocyanate, ketone, methacrylate, nitrile, nitro, sulfide, sulfone, thiol, urethane, alkylvinyl, and vinyl.

3. The coating composition of claim 1 , wherein the poly(hydroxystyrene) comprises linear and/or branched poly(hydroxystyrene).

4. The coating composition of claim 1 , wherein the poly(hydroxystyrene) has a number average molecular weight of 500-3000 Da.

5. The coating composition of claim 1 , wherein the poly(hydroxystyrene) is present in 0.1%-10% by weight of the coating composition.

6. The coating composition of claim 1 , wherein the latex polymer is (meth)acrylic.

7. The coating composition of claim 1 , wherein the latex polymer is present in 40%-70% by weight of the coating composition.

8. The coating composition of claim 1 , wherein the crosslinker is a beta-hydroxyalkyl amide.

9. A coated substrate comprising a layer of a coating composition which comprises
a hydroxyphenyl functional polymer, wherein the hydroxyphenyl functional polymer is a poly(hydroxystyrene);
a latex polymer; and
a crosslinker.

10. The coated substrate of claim 9 , wherein the substrate is an aluminum beverage can.

11. A method of preparing a coated substrate comprising applying and curing a layer of a coating composition onto the surface of the substrate, wherein the coating composition comprises:
a hydroxyphenyl functional polymer, wherein the hydroxyphenyl functional polymer is a poly(hydroxystyrene);
a latex polymer; and
a crosslinker.

12. The method of claim 11 , wherein the substrate is a beverage can.

Assignees

• Akzo Nobel Coatings Int Bv

Inventors

• Wojtalewicz Jennifer
• Polykarpov Alexander

Classifications

• C09D125/18 Primary

  Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen · CPC title

• C08L25/00

  Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers · CPC title

• C09D133/02 Primary

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• C09D4/06

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00 · CPC title

• B65D25/14

  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