Alkylene oxide urethane associative thickener modified with a hydrophobic oligomer

Patent metadata

Field	Value
Publication number	US-10450472-B2
Application number	US-201715690636-A
Country	US
Kind code	B2
Filing date	Aug 30, 2017
Priority date	Sep 1, 2016
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

The present invention relates to a composition comprising an aqueous solution or dispersion of an associative thickener having a poly(oxyalkylene-urethane) backbone and at least one terminal hydrophobe comprising from 3 to 20 structural units of an acrylate, a methacrylate, a styrene, or a combination thereof. Brookfield, ICI, and KU viscosity profiles can be tuned with greater ease with the composition of the present invention.

First claim

The invention claimed is:

1. A composition comprising an aqueous solution of an associative thickener having a poly(oxyalkylene-urethane) backbone and at least one terminal hydrophobe represented by the following formula:

where R is a C 2 -C 20 divalent hydrocarbyl group; R 1 is H or methyl; and R 2 is C 1 -C 18 -alkyl, C 5 -C 8 -cycloalkyl, aryl, C 1 -C 18 -alkylaryl, C 1 -C 3 -dialkylamino-C 1 -C 18 -alkyl,
C 1 -C 30 -alkoxy-(CH 2 CH 2 O) z —CH 2 CH 2 —, aryloxy-(CH 2 CH 2 O) z CH 2 CH 2 —, or glycidyl; n is 0 to 20;
m is 0 to 20; and m+n is 3 to 20; and z is from 0 to 50.

2. The composition of claim 1 where R is a linear or branched C 2 -C 10 alkylene group; R 2 is methyl, ethyl, n-butyl, 2-ethylheptyl, dimethylaminoethyl, t-butylaminoethyl, cyclohexyl, isobornyl, lauryl, C 10 H 21 O(CH 2 CH 2 O) z CH 2 CH 2 —, C 18 H 35 O—(CH 2 CH 2 O) z —CH 2 CH 2 —, C 16 H 33 O(CH 2 CH 2 O) z CH 2 CH 2 —, C 12 H 25 O(CH 2 CH 2 O) z CH 2 CH 2 —, C 22 H 45 O—(CH 2 CH 2 O) z —CH 2 CH 2 —, tristyryl phenoxy(CH 2 CH 2 O) z CH 2 CH 2 —, dibutylamino-(CH 2 CH 2 O) z —CH 2 CH 2 —, and bis(2-ethylhexyl)amino-(CH 2 CH 2 O) z —CH 2 CH 2 —; where z=0-50; m is 0 to 10; n is 3 to 10; and m+n is 3 to 10.

3. The composition of claim 1 where R is —CH 2 CH 2 —; R 1 is H or CH 3 ; R 2 is methyl, ethyl, n-butyl, or 2-ethylheptyl; m is from 3 to 10; and n is 0.

4. The composition of claim 1 wherein the associative thickener has a poly(oxyethylene-urethane) backbone and two terminal hydrophobes.

5. The composition of claim 4 wherein the poly(oxyethylene-urethane) backbone comprises pendant as well as terminal hydrophobes.

6. The composition of claim 3 where R is —CH 2 CH 2 —; R 1 is H or CH 3 and R 2 is methyl or butyl, with the proviso that when R 1 is methyl, R 2 is methyl, and when R 1 is H, R 2 is butyl; and m+n is from 3 to 8.

Assignees

• Rohm & Haas

Inventors

• Hawkins Douglas R
• Rabasco John J
• Van Dyk Antony K

Classifications

• C09D5/024

  characterised by the additives · CPC title

• C09D7/43 Primary

  Thickening agents · CPC title

• C08G18/73 Primary

  acyclic · CPC title

• C08G18/4825

  Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence) · CPC title

• C08G18/10 Primary

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title