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US 2020/0370245 A1Published application
Composition for paper coating slip
AssigneeCoatex
InventorsFrancis BONY, Clementine CHAMPAGNE, Francois DUPONT, Laurie PARRENIN, Jean-Marc SUAU
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Abstract
The invention relates to a paper coating slip composition comprising a copolymer of thickening acrylic acid, a mineral material in the form of particles, a binding agent, and water. The invention also relates to the use of said composition for the production of paper or cardboard, improving the water retention of the paper coating slip.
Claims20
An aqueous composition, comprising:
- a) from 0.02 to 2% by dry mass of at least one copolymer prepared by a polymerization reaction of at least:
- at least one compound (a1) selected from the group consisting of:
- at least one compound (a1-1) selected from the group consisting of acrylic acid, an acrylic acid salt and combinations thereof;
- and
- the at least one compound (a1-1) and at least one compound (a1-2) selected from the group consisting of methacrylic acid, a methacrylic acid salt and combinations thereof, in an (a1-1)/(a1-2) weight ratio of greater than 0.15;
- at least one compound (a2) selected from the group consisting of styrene, vinyl caprolactam, an ester of acrylic acid, an ester of methacrylic acid, an ester of itaconic acid, an ester of crotonic acid, an ester of maleic acid, an ester of maleic anhydride, and combinations thereof;
- and
- at least one compound (a3) selected from the group consisting of 2-acrylamido-2-methylpropane sulphonic acid, 2-sulphoethyl methacrylate, sodium methallyl sulphonate, styrene sulphonate, salts thereof and combinations thereof.
- b) from 30 to 75% by dry mass of at least one mineral material in particle form,
- c) from 2 to 25% by dry mass of at least one binding agent and
- d) 22.98 to 44.98% by mass of water.
8 more elements
Dependencies are inferred from the claim text.