Wood coating composition

Patent metadata

Field	Value
Publication number	US-2016122575-A1
Application number	US-201314891044-A
Country	US
Kind code	A1
Filing date	May 30, 2013
Priority date	May 30, 2013
Publication date	May 5, 2016
Grant date	—

Abstract

A wood coating formulation with improved water repellency while maintaining coating performance such as clarity and hardness, the process of making thereof.

First claim

1 . A polymer dispersion comprising, based on the total weight of the polymer dispersion, from 40 wt. % to 70 wt. % of water and from 30 wt. % to 60 wt. % of polymer particles comprising, as polymerized units, based on the total weight of the polymer particles,
i) from 28 wt. % to 46 wt. % of at least one (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer; ii) from 0.1 wt. % to 10 wt. % of at least one self-crosslinking monomer; iii) from 2 wt. % to 4 wt. % of at least one reactive silicone with at least one carbon-carbon double bond; iv) from 0.5 wt. % to 5 wt. % of a reactive surfactant; wherein the reactive silicone with at least one double bond and the (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer are polymerized through the carbon-carbon double bond; the polymer particles have a Tg of from 20° C. to 50° C.; and a particle size of from 50 to 150 nm; wherein the reactive silicone has one of the following formulas (I) to (III):

wherein R 1 or R 4 is the same or different, and represents a hydrogen atom or a methyl group; R 2 or R 3 is the same or different, and represents a C 1 -C 6 bivalent hydrocarbon group; and n represents an integer of from 1 to 100;

wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a C 1 -C 6 bivalent hydrocarbon group; R 3 represents a C 1 -C 10 alkyl group or a C 1 -C 10 alkoxyl group; and n represents an integer of from 1 to 100; or

wherein R 1 represents a hydrogen atom or a methyl group, and R 2 represents a C 1 -C 6 bivalent hydrocarbon group;
and wherein the reactive surfactant has a structure of R 1 -R 2 ; wherein R 1 is an alkenyl group selected from CH 3 —CH═CH—, CH 2 ═CH—HC—, CH 2 ═C(CH 3 )—CH 2 —CH 2 —; R 2 is a radical comprising at least two carbon atoms and at least one oxylene, oxypropylene or oxybutylene unit.

2 . The polymer dispersion according to claim 1 wherein the (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer is selected from 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, lauryl (meth)acrylate, isodecyl (meth)acrylate, and the combination thereof.

3 . The polymer dispersion according to claim 2 wherein the (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer is selected from 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, and the combination thereof.

4 . The polymer dispersion according to claim 1 wherein the self-crosslinking monomer is selected from diacetone acrylamide, acetoacetoxyethyl (meth)acrylate, acetoacetoxypropyl (meth)acrylate, allyl acetoacetate, acetoacetoxybutyl (meth)acrylate, 2,3-di(acetoacetoxy)propyl (meth) acrylate, and the composition thereof.

5 . The polymer dispersion according to claim 1 wherein the reactive surfactant has a structure of R 1 -R 2 ; wherein R 2 is —C 6 H 3 (R 3 )—O—(CH 2 —CH 2 —O) n —R 4 , —O—CH 2 —CH(CH 2 —O—C 6 H 4 —R 3 )—O—(CH 2 —CH 2 —O) n —R 4 , —O—(CH 2 —CH 2 —O) n —R 4 , —O—(CH 2 —CH(CH 3 )—O) n —R 4 , —O—(CH 2 —CH(CH 2 CH 3 )—O) n —R 4 , —O—(CH 2 —CH 2 —O) m —(CH 2 —CH(CH 3 )—O) n —R 4 , —O—(CH 2 —CH(CH 3 )—O) m —(CH 2 —CH 2 —O) n —R 4 , —O—(CH 2 —CH(CH 2 CH 3 )—O) m —(CH 2 —CH 2 —O) n —R 4 , or —O—(CH 2 —CH 2 —O) m —(CH 2 —CH(CH 2 CH 3 )—O) n —R 4 ; wherein R 3 is an alkyl group; R 4 is hydrogen or a polar group; n is from 5 to 100; and m is from 0 to 100.

6 . A wood coating composition comprising from 50 wt. % to 85 wt. %, based on the total weight of the wood coating composition, a polymer dispersion comprising, based on the total weight of the polymer dispersion, from 40 wt. % to 70 wt. % of water and from 30 wt. % to 60 wt. % of polymer particles comprising, as polymerized units, based on the total weight of the polymer particles,
i) from 28 wt. % to 46 wt. % of at least one (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer; ii) from 0.1 wt. % to 10 wt. % of at least one self-crosslinking monomer; iii) from 2 wt. % to 4 wt. % of at least one reactive silicone with at least one carbon-carbon double bond; iv) from 0.5 wt. % to 5 wt. % of a reactive surfactant; wherein the reactive silicone with at least one double bond and the (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer are polymerized through the carbon-carbon double bond; the polymer particles have a Tg of from 20° C. to 50° C.; and a particle size of from 50 to 150 nm; wherein the reactive silicone has one of the following formulas (I) to (III):

wherein R 1 or R 4 is the same or different, and represents a hydrogen atom or a methyl group; R 2 or R 3 is the same or different, and represents a C 1 -C 6 bivalent hydrocarbon group; and n represents an integer of from 1 to 100;

wherein R 1 represents a hydrogen atom or a methyl group; R 2 represents a C 1 -C 6 bivalent hydrocarbon group; R 3 represents a C 1 -C 10 alkyl group or a C 1 -C 10 alkoxyl group; and n represents an integer of from 1 to 100; or

wherein R 1 represents a hydrogen atom or a methyl group, and R 2 represents a C 1 -C 6 bivalent hydrocarbon group;
and wherein the reactive surfactant has a structure of R 1 -R 2 ; wherein R 1 is an alkenyl group selected from CH 3 —CH═CH—, CH 2 ═CH—HC—, CH 2 ═C(CH 3 )—CH 2 —CH 2 —; R 2 is a radical comprising at least two carbon atoms and at least one oxylene, oxypropylene or oxybutylene unit.

7 . The wood coating composition according to claim 6 wherein the (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer is selected from 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, lauryl (meth)acrylate, isodecyl (meth)acrylate, and the combination thereof.

8 . The wood coating composition according to claim 7 wherein the (meth)acrylate C 6 -C 22 alkyl ester nonionic monomer is selected from 2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, and the combination thereof.

9 . The wood coating composition according to claim 6 wherein the self-crosslinking monomer is selected from diacetone acrylamide, acetoacetoxyethyl (meth)acrylate, acetoacetoxypropyl (meth)acrylate, allyl acetoacetate, acetoacetoxybutyl (meth)acrylate, 2,3-di(acetoacetoxy)propyl (meth) acrylate, and the composition thereof.

10 . The wood coating composition according to claim 6 wherein the reactive surfactant has a structure of R 1 -R 2 ; wherein R 2 is —C 6 H 3 (R 3 )—O—(CH 2 —CH 2 —O) n —R 4 , —O—CH 2 —CH(CH 2 —O—C 6 H 4 —R 3 )—O—(CH 2 —CH 2 —O) n —R 4 , —O—(CH 2 —CH 2 —O) n —R 4 , —O—(CH 2 —CH(CH 3 )—O) n —R 4 , —O—(CH 2 —CH(CH 2 CH 3 )—O) n —R 4 , —O—(CH 2 —CH 2 —O) m —(CH 2 —CH(CH 3 )—O) n —R 4 , —O—(CH 2 —CH(CH 3 )—O) m —(CH 2 —CH 2 —O) n —R 4 , —O—(CH 2 —CH(CH 2 CH 3 )—O) m —(CH 2 —CH 2 —O) n —R 4 , or —O—(CH 2 —CH 2 —O) m —(CH 2 —CH(CH 2 CH 3 )—O) n —R 4 ; wherein R 3 is an alkyl group; R 4 is hydrogen or a polar group; n is from 5 to 100; and m is from 0 to 100.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Yang Xiaohong
• Xu Jlanming
• Xu Yawel
• Zheng Baoqing
• Shu Shujun

Classifications

• C08F230/08

  containing silicon · 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

• C08G77/20

  containing silicon bound to unsaturated aliphatic groups · CPC title

• C09J133/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title