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US 11,453,735 B2Granted
Water-soluble copolymer composition with neutral pH
AssigneeArkema France
InventorsAnne-Laure Brocas, Sylvie Cazaumayou, Sylvain Bourrigaud, Guillaume Decrevoisier
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Abstract
The present invention relates to the field of copolymers which are water-soluble or water-dispersible at neutral pH or near-neutral pH, that is to say between 5.5 and 9.5, comprising at least one random copolymer comprising methacrylic acid, butyl acrylate, styrene and a monomer chosen from styrenesulfonic acid or salts thereof, vinylbenzoic acid or salts thereof, 2-acrylamido-2-methanesulfonic acid or salts thereof, N-vinylpyrrolidone, alone or in combination.
Claims10
A composition comprising a random copolymer, where the random copolymer comprises the following monomers:
- 1 to 45% by weight of styrene, limits included;
- 35 to 45% by weight of methacrylic acid, limits included;
- 15 to 35% by weight of butyl acrylate, limits included;
- 1 to 45% of a monomer chosen from styrenesulfonic acid or salts thereof, vinylbenzoic acid or salts thereof, 2-acrylamido-2-methanesulfonic acid or salts thereof, N-vinylpyrrolidone, alone or in combination, limits included,
- wherein the weight % is relative to the total weight of the random copolymer, and
- wherein the random copolymer has a weight-average molecular weight of between 30,000 and 300,000 g/mol.
3 more elements
Dependencies are inferred from the claim text.