Tint base paint formulation with a poly(oxyalkylene-urethane) associative thickener modified with a hydrophobic oligomer

Patent metadata

Field	Value
Publication number	US-10703841-B2
Application number	US-201816179231-A
Country	US
Kind code	B2
Filing date	Nov 2, 2018
Priority date	Nov 3, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

Where R, R1, R2, m an n are defined herein. The composition provides viscosity stability for paint formulations containing a HEUR rheology modifier.

First claim

The invention claimed is:

1. A composition comprising an aqueous dispersion of a) 10 to 60 weight percent, based on the weight of the composition, of polymer particles; b) less than 15 pigment volume concentration (PVC) of pigment particles; and c) from 0.05 to 2 weight percent, based on the weight of the composition, of a hydrophobically modified poly(oxyalkylene-urethane) rheology modifier having a hydrophobic portion represented by Structure I:

where R is a C 2 -C 20 divalent hydrocarbyl group; each R 1 is independently H or methyl; each R 2 is independently H, 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; m is 2 to 20; n is 0 to 20; m+n is 2 to 20; and z is from 0 to 50.

2. The composition of claim 1 wherein R is a C 2 -C 10 branched or linear alkylene group; each R 2 is independently a C 1 -C 18 alkyl group; m is 3 to 10; n is 0 to 5; and m +n is 3 to 10.

3. The composition of claim 2 which comprises less than 10 PVC of pigment particles.

4. The composition of claim 3 wherein m is 3 to 8; n is 0; R is a —CH 2 CH 2 — group, a —CH 2 CH 2 CH 2 — group, or a —CH 2 CH 2 CH 2 CH 2 — group; each R 2 is independently methyl, ethyl, propyl, n-butyl, 2-ethylhexyl, or 2-propylheptyl.

5. The composition of claim 4 wherein the hydrophobically modified poly(oxyalkylene-urethane) rheology modifier is a polyethylene oxide urethane polymer having a M w in the range of from 2,000 to 50,000 Daltons as determined by size exclusion chromatography.

6. The composition of claim 5 wherein R is a —CH 2 CH 2 — group; R 1 and R 2 are each methyl.

7. The composition of claim 2 wherein the polymer particles comprise, based on the weight of the polymer particles at least 50 weight percent structural units of acrylate and methacrylate monomers and from 0.2 to 5 weight percent of an ethylenically unsaturated carboxylic acid monomer.

8. The composition of claim 2 wherein the polymer particles comprise, based on the weight of the polymer particles at least 50 weight percent structural units of a vinyl ester monomer.

9. The composition of claim 1 which further comprises from a colorant at a concentration in the range of from 5 to 20 volume percent of the total volume of the composition and colorant.

Assignees

• Rohm & Haas
• Dow Global Technologies Llc

Inventors

• Rabasco John J
• Romer Duane R
• Saucy Daniel A
• Van Dyk Antony K

Classifications

• C08G18/246 Primary

  containing also tin-carbon bonds · CPC title

• C08G18/751

  containing only one cycloaliphatic ring · CPC title

• C08G18/7642

  containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring · CPC title

• C08G18/773

  halogens · CPC title

• C08G18/6245

  Polymers having terminal groups containing active hydrogen · CPC title