Use of aqueous binders in producing filter materials
AssigneeBASF SE
InventorsMatthias Laubender, Matthias Gerst
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Abstract
The use of an aqueous polymer dispersion comprising dispersed particles of at least one polymer A1 obtainable by free-radical emulsion polymerization in the presence of a polymer A2 synthesized from from 50 to 99.5% by weight of at least one ethylenically unsaturated monocarboxylic and/or dicarboxylic acid, from 0.5 to 50% by weight of at least one ethylenically unsaturated compound selected from the esters of ethylenically unsaturated monocarboxylic acids and the monoesters and diesters of ethylenically unsaturated dicarboxylic acids with an amine containing at least one hydroxyl group, up to 20% by weight of at least one further monomer as a binder for producing filter materials.
Claims22
A filter material treatment process comprising:
- resinating a filter material with an aqueous polymer dispersion comprising dispersed particles of at least one polymer A1 obtained by free-radical emulsion polymerization in the presence of a polymer A2 to form a resinated filter material, and
- curing the resinated filter material;
- wherein the polymer A2 comprises:
- (i) polymerized units of from 50 to 99.5% by weight of at least one of an ethylenically unsaturated monocarboxylic acid and an ethylenically unsaturated dicarboxylic acid,
- (ii) from 0.5 to 50% by weight of at least one ethylenically unsaturated compound having an amine containing at least one hydroxyl group selected from the group consisting of an ester of an ethylenically unsaturated monocarboxylic acid, a monoester of an ethylenically unsaturated dicarboxylic acid, and a diester of an ethylenically unsaturated dicarboxylic acid, and
- (iii) up to 20% by weight of at least one further monomer.
Dependencies are inferred from the claim text.