Stain resistant coating compositions and coatings formed therefrom

Patent metadata

Field	Value
Publication number	US-10508216-B2
Application number	US-201615580902-A
Country	US
Kind code	B2
Filing date	Jun 9, 2016
Priority date	Jun 9, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A stain resistant coating composition can include: (a) a polyester polyol; (b) a silicone component having at least one reactive functional group; and (c) a crosslinker reactive with (a) and (b). The polyester polyol can include a reaction product obtained from a mixture of reactants including: an aliphatic diol; a polyol having 3 or more hydroxyl groups; and an aliphatic cyclic polycarboxylic acid, or an anhydride or ester thereof, that is greater than 10 mole % of the total carboxylic acids, or anhydrides or esters thereof, used to prepare the polyester.

First claim

The invention claimed is:

1. A coating composition comprising:
a) a polyester polyol comprising a reaction product obtained from a mixture of reactants comprising:
an aliphatic diol;
a polyol comprising 3 or more hydroxyl groups; and
an aliphatic cyclic polycarboxylic acid, or an anhydride or ester thereof, that comprises greater than 10 mole % of the total carboxylic acids, or anhydrides or esters thereof, used to prepare the polyester;

b) a silicone component comprising at least one reactive functional group; and
c) a crosslinker reactive with (a) and (b),
wherein the polyester polyol has a hydroxyl value of greater than 300 mg KOH/g.

2. The coating composition of claim 1 , wherein the polyol comprising 3 or more hydroxyl groups is in an amount of at least 20 weight % of the mixture of reactants used to prepare the polyester polyol based on the total weight of the reactants used to prepare the polyester polyol.

3. The coating composition of claim 1 , wherein the aliphatic cyclic polycarboxylic acid, or the anhydride or ester thereof, is in an amount of at least 40 mole % of the total carboxylic acids, or anhydrides or esters thereof, used to prepare the polyester.

4. The coating composition of claim 1 , wherein the polyester polyol has a hydroxyl value of at least 400 mg KOH/g.

5. The coating composition of claim 1 , wherein the molar ratio of hydroxyl group equivalents to carboxylic acid group equivalents of the reactants forming the polyester polyol is from 1.5:1 to 3.5:1.

6. The coating composition of claim 1 , wherein the polyester polyol has a weight average molecular weight of less than 10,000 g/mol as determined by gel permeation chromatography versus a polystyrene standard with tetrahydrofuran as an eluent.

7. The coating composition of claim 1 , wherein the polyester polyol is prepared with at least two different aliphatic diols.

8. The coating composition of claim 1 , wherein the aliphatic diol comprises a branched aliphatic diol.

9. The coating composition of claim 1 , wherein the crosslinker comprises a polyisocyanate.

10. The coating composition of claim 1 , further comprising particles having an average particle size of up to 30 microns.

11. The coating composition of claim 10 , wherein the particles have an average particle size of 0.5 micron to 30 microns.

12. The coating composition of claim 11 , wherein the coating composition comprises a weight ratio of the particles to the total of (a), (b), and (c) of 0.05:1 to 0.25:1.

13. The coating composition of claim 1 , wherein the polyester polyol (a) is completely free of polymerizable ethylenically unsaturated groups.

14. The coating composition of claim 1 , wherein the coating composition is completely free of polymerizable ethylenically unsaturated groups.

15. The coating composition of claim 1 , wherein the at least one reactive functional group of the silicone component comprises a hydroxyl group.

16. The coating composition of claim 1 , wherein the silicone component comprises two or more reactive functional groups.

17. The coating composition of claim 1 , wherein the polyester polyol (a) is completely free of aromatic groups.

18. A substrate at least partially coated with a coating formed from the coating composition of claim 1 .

19. An electronic device or electronic component comprising a surface at least partially coated with a coating formed from the coating composition of claim 1 .

20. An electronic device or electronic component comprising a surface at least partially coated with a coating formed from a coating composition comprising:
a) a polyester polyol comprising a reaction product obtained from a mixture of reactants comprising:
an aliphatic diol;
a polyol comprising 3 or more hydroxyl groups; and
an aliphatic cyclic polycarboxylic acid, or an anhydride or ester thereof, that comprises greater than 10 mole % of the total carboxylic acids, or anhydrides or esters thereof, used to prepare the polyester;
b) a silicone component comprising at least one reactive functional group; and
c) a crosslinker reactive with (a) and (b).

Assignees

• Ppg Ind Ohio Inc

Inventors

• Hensel Gereme Thomas
• Gao Renlong
• Schwendeman Irina G
• Saha Gobinda
• Richman Courtney

Classifications

• C09D175/06 Primary

  from polyesters · CPC title

• C08G18/4241 Primary

  from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional · CPC title

• C08G18/289

  containing silicon · CPC title

• C08G18/423

  containing cycloaliphatic groups · CPC title

• C09D175/04 Primary

  Polyurethanes · CPC title