Polymer dispersion for durable coating, and the coating comprising the same

Patent metadata

Field	Value
Publication number	US-10647874-B2
Application number	US-201616066416-A
Country	US
Kind code	B2
Filing date	Jan 21, 2016
Priority date	Jan 21, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present invention provides a coating composition comprising a polymer binder and from 1% to 40% by dry weight based on total dry weight of the coating composition, titanium dioxide particles, wherein the polymer binder comprises, as polymerized units, by dry weight based on total dry weight of the polymer binder, from 50% to 99%, ethylenically unsaturated nonionic monomers, and from 1% to 5%, a vinyl functionalized benzotriazole.

First claim

What is claimed is:

1. A coating composition comprising a polymer binder, and from 1% to 40% by dry weight based on total dry weight of the coating composition, titanium dioxide particles, wherein the polymer binder comprises, as polymerized units, by dry weight based on total dry weight of the polymer binder, from 50% to 99%, ethylenically unsaturated nonionic monomers, and from 1% to 5%, a vinyl functionalized benzotriazole having the following Structure (I):

wherein n is an integer of from 6 to 40;
wherein R 1 is a vinyl-containing group selected from methyl acrylate, methacrylamide, acrylate, acrylamide, vinyl ether, and allyl ether;
wherein R 2 is selected from C 1-4 alkylene and C 1-5 alkylenylcarboxy;
wherein X 1 , X 2 , X 3 or X 4 is each independently selected from H, C 1-10 alkyl, OH and OCH 3 ; and
wherein Y 1 , Y 2 , Y 3 or Y 4 is each independently selected from H, OH and OCH 3 .

2. The coating composition according to claim 1 wherein the polymer binder further comprises, as polymerized units, from 0.1% to 20% by dry weight based on total dry weight of the polymer binder, an ethylenically unsaturated monomer carrying at least one functional group selected from the group consisting of carboxyl, carboxylic anhydride, hydroxyl, amide, amino, ureido, acetoacetate, sulphonate, and phosphonate.

3. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole is a 2-(2′-hydroxy-3′-tertbutyl-5′-methacrylethyloxylate ethylphenyl)-2H-benzotriazole having the following Structure (II):

wherein n is an integer of from 6 to 20.

4. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole is a 2-(2′-hydroxy-3′-tertbutyl-5′-methacrylethyloxylate ethylenylcarboxy phenyl)-2H-benzotriazole having the following Structure (III):

wherein n is an integer of from 6 to 20.

5. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole having the Structure (I) is from 2% to 4% by dry weight based on total dry weight of the polymer binder.

6. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole having the Structure (I) has an R 1 of being methyl acrylate or acrylate.

7. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole having the Structure (I) has an R 2 being ethylene or ethylenylcarboxy.

8. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole having the Structure (I) has any of X 1 , X 2 , X 3 and X 4 being H, OH or t-butyl.

9. The coating composition according to claim 1 wherein the vinyl functionalized benzotriazole having the Structure (I) has any of Y 1 , Y 2 , Y 3 and Y 4 being H or OH.

10. The coating composition according to claim 1 wherein the polymer binder comprises, as polymerized units, by dry weight based on total dry weight of the polymer binder, from 60% to 98% of the ethylenically unsaturated nonionic monomers.

11. The coating composition according to claim 1 , wherein ethylenically unsaturated nonionic monomer is selected from the group consisting of methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, decyl acrylate, lauryl acrylate, methyl methacrylate, butyl methacrylate, isodecyl methacrylate, lauryl methacrylate, 2-hydroxybutyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, (meth)acrylonitrile, α-methyl styrene, vinyl toluene, butadiene, ethylene, propylene, 1-decene, vinyl acetate, vinyl butyrate, vinyl versatate, vinyl chloride vinylidene chloride, and a combination thereof.

12. The coating composition according to claim 1 , wherein ethylenically unsaturated nonionic monomer is selected from the group consisting of ethyl acrylate, methyl methacrylate, butyl acrylate, 2-ethylhexyl acrylate, and any combination thereof.

13. The coating composition according to claim 2 , wherein the ethylenically unsaturated monomer carrying at least one functional group is selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, (meth)acrylamide, N-methylol(meth)acrylamide, 2-hydroxyethyl(meth)acrylamide, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate; N,N-dimethylaminoethyl methacrylate, methacrylamidoethyl-2-imidazolidinone; acetoacetoxyethyl methacrylate; and any combinations thereof.

14. The coating composition of claim 1 , wherein the polymer binder comprises, as polymerized units, by dry weight based on total dry weight of the polymer binder, from 1.5% to 4.5% of the vinyl functionalized benzotriazole having Structure (I).

Assignees

• Rohm & Haas

Inventors

• Liu Hui
• Xu Jianming
• Wang Yujiang

Classifications

• C08K3/22

  of metals · CPC title

• C09D139/04 Primary

  Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member · CPC title

• C09D133/08 Primary

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C09D7/61

  inorganic · CPC title

• C09D7/63

  organic · CPC title