Anti-settling and thickening compositions and methods for using same
AssigneeRhodia Operations
InventorsNemesio Martinez-Castro, Jose P. Ruiz
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Abstract
An anti-settling additive, composition containing the anti-settling additive, and methods for use in coating compositions or formulations. A HASE thickener with improved resistance to surfactants and anti-sag properties, compositions containing the thickener and methods for use of the thickener in coating compositions or formulations and the like. The anti-settling additive and the thickener being a polymer synthesized using a specialized associative monomer that contains C1-C4 alkyl, propylene oxide, ethylene oxide and a polymerizable group.
Claims30
A polymer which is an anti-settling additive, the polymer comprising
- (a) about 25 to about 70 weight percent based on total monomers of at least one carboxylic acid monomer selected from the group consisting of methacrylic acid, acrylic acid, and a combination thereof;
- (b) about 30 to about 70 weight percent based on total monomers of at least one copolymerizable non-ionic C2-C12 alpha beta-ethylenically unsaturated monomer of the structure (III):
- CH2═CYZ (III)
- wherein Y is H;
- Z is —COOR′, wherein R′ is alkyl such that the at least one copolymerizable non-ionic C2-C12 alpha beta-ethylenically unsaturated monomer comprises ethyl acrylate;
- (c) about 0.05 to about 20 weight percent based on total monomer weight of at least one specialized associative monomer
- wherein the specialized associative monomer is an alkyl alkoxylate according to structure (VI):
- wherein R3 is CH3, R4 is CH3, R5 is CH3, N is from 8 to 10, and M is from 18 to 22.
Dependencies are inferred from the claim text.