A hydrophobic alkali soluble emulsion thickener

Patent metadata

Field	Value
Publication number	US-2016168291-A1
Application number	US-201314909149-A
Country	US
Kind code	A1
Filing date	Aug 9, 2013
Priority date	Aug 9, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

The present invention provides a hydrophobic alkali soluble emulsion comprising a polymer obtainable by polymerization with the following monomer components: a) from 40 wt. % to 50 wt. %, based on the total weight of the polymer, of an α,β-ethylenically unsaturated carboxylic acid monomer; b) from 40 wt. % to 50 wt. %, based on the total weight of the polymer, of an α,β-ethylenically unsaturated nonionic monomer; c) from 5 wt. % to 8 wt. %, based on the total weight of the polymer, of a nonionic macromonomer; and d) from 1 wt. % to 3 wt. %, based on the total weight of the polymer, of a methyl polyglycol acrylic acid ester.

First claim

What is claimed is:

1 . A hydrophobic alkali soluble emulsion comprising a polymer obtainable by polymerization with the following monomer components:
a) from 40 wt. % to 50 wt. %, based on the total weight of the polymer, of an α,β-ethylenically unsaturated carboxylic acid monomer; b) from 40 wt. % to 50 wt. %, based on the total weight of the polymer, of an α,β-ethylenically unsaturated nonionic monomer; c) from 5 wt. % to 8 wt. %, based on the total weight of the polymer, of a nonionic macromonomer; and d) from 1 wt. % to 3 wt. %, based on the total weight of the polymer, of a methyl polyglycol acrylic acid ester.

2 . The hydrophobic alkali soluble emulsion according to claim 1 wherein the nonionic macromonomer has the formula:
H 2 C═C(R)CO 2 (CH 2 CH 2 O) n (CH(R 1 )CH 2 O) m R 2 ,

wherein R is H or CH 3 , R 1 is C 1 -C 2 alkyl; R 2 is C 8 -C 30 alkyl, C 8 -C 16 alkyl phenyl or C 13 -C 36 aralkyl phenyl; n is an integer from 6 to 100 and m is an integer from 0 to 50, provided that n≧m and m+n is from 6 to 100.

3 . The hydrophobic alkali soluble emulsion according to claim 1 wherein the methyl polyglycol acrylic acid ester has the formula:
H 2 C═C(CH 3 )CO 2 (CH 2 CH 2 O) n CH 3 ,

wherein n is an integer from 20 to 30.

4 . The hydrophobic alkali soluble emulsion according to claim 1 wherein the α,β-ethylenically unsaturated carboxylic acid monomer is selected from acrylic acid, methacrylic acid, and the mixture thereof.

5 . The hydrophobic alkali soluble emulsion according to claim 1 wherein the α,β-ethylenically unsaturated nonionic monomer is selected from ethyl acrylate, methyl methacrylate, 2-hydroxybutyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, vinyl acetate, acrylonitrile and the mixture thereof.

6 . The hydrophobic alkali soluble emulsion according to claim 2 wherein the nonionic macromonomer has the formula:
H 2 C═C(R)CO 2 (CH 2 CH 2 O) n (CH(R 1 )CH 2 O) m R 2 ,

wherein m=0, and n is an integer from 10 to 60.

7 . The hydrophobic alkali soluble emulsion according to claim 3 wherein the methyl polyglycol acrylic acid ester has the formula:
H 2 C═C(CH 3 )CO 2 (CH 2 CH 2 O) n CH 3 ,

wherein n is an integer from 23 to 27.

8 . The hydrophobic alkali soluble emulsion according to claim 1 where in the methyl polyglycol acrylic acid ester is from 1.5 wt. % to 2.5 wt. % based on the total weight of the polymer.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Fan Liqiang
• Li Ling

Classifications

• C08F220/06 Primary

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title

• C08F265/06

  Polymerisation of acrylate or methacrylate esters on to polymers thereof · CPC title

• C08F2/26

  anionic · CPC title

• C08F220/18

  with acrylic or methacrylic acids · CPC title

• C08F220/286

  and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate · CPC title