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AQUEOUS POLYMER DISPERSIONS
The present invention relates to aqueous polymer dispersions, which are obtainable by a free radical aqueous emulsion polymerization of ethylenically unsaturated monomers M, which comprise a) 0.5 to 7.0% by weight, based on the total weight of monomers M, of a combination of a1 ) at least one monomer Ma1, selected from monoethylenically unsaturated monocarboxylic acids having 3 to 6 carbon atoms and the salts thereof; a2) at least one monomer Ma2, selected from monoethylenically unsaturated dicarboxylic acids having 4 to 8 carbon atoms and the salts thereof; a3) at least one monomer Ma3, selected from monoethylenically unsaturated monosulfonic acids having 2 to 10 carbon atoms and the salts thereof; b1) 60 to 79.45% by weight, based on the total weight of monomers M, of at least one monomer Mb1, which is selected from nonionic monoethylenically unsaturated monomers having a solubility in deionized water of at most 60 g/L at 25°C and 1 bar, and whose homopolymers have a glass transition temperature Tg of at least 50°C; b2) 20 to 39.45% by weight, based on the total weight of monomers M, of at least one monomer Mb2, which is selected from nonionic monoethylenically unsaturated monomers having a solubility in deionized water of at most 60 g/L at 25°C and 1 bar, and whose homopolymers have a glass transition temperature Tg of at most 40°C; c) 0.05 to 2.0% by weight of at least one crosslinking monomer Mc; where the aqueous emulsion polymerization is carried out at least partly in the presence of a chain transfer compound. The invention also relates to a process for producing the aqueous polymer dispersions. The aqueous polymer dispersions are useful as binders in water-borne coating formulations, in particular as binder in water-borne coating formulations for shaped mineral articles.
AQUEOUS POLYMER DISPERSIONS
The present invention relates to aqueous polymer dispersions, which are obtainable by a free radical aqueous emulsion polymerization of ethylenically unsaturated monomers M, which comprise a) 0.5 to 7.0% by weight, based on the total weight of monomers M, of a combination of a1 ) at least one monomer Ma1, selected from monoethylenically unsaturated monocarboxylic acids having 3 to 6 carbon atoms and the salts thereof; a2) at least one monomer Ma2, selected from monoethylenically unsaturated dicarboxylic acids having 4 to 8 carbon atoms and the salts thereof; a3) at least one monomer Ma3, selected from monoethylenically unsaturated monosulfonic acids having 2 to 10 carbon atoms and the salts thereof; b1) 60 to 79.45% by weight, based on the total weight of monomers M, of at least one monomer Mb1, which is selected from nonionic monoethylenically unsaturated monomers having a solubility in deionized water of at most 60 g/L at 25°C and 1 bar, and whose homopolymers have a glass transition temperature Tg of at least 50°C; b2) 20 to 39.45% by weight, based on the total weight of monomers M, of at least one monomer Mb2, which is selected from nonionic monoethylenically unsaturated monomers having a solubility in deionized water of at most 60 g/L at 25°C and 1 bar, and whose homopolymers have a glass transition temperature Tg of at most 40°C; c) 0.05 to 2.0% by weight of at least one crosslinking monomer Mc; where the aqueous emulsion polymerization is carried out at least partly in the presence of a chain transfer compound. The invention also relates to a process for producing the aqueous polymer dispersions. The aqueous polymer dispersions are useful as binders in water-borne coating formulations, in particular as binder in water-borne coating formulations for shaped mineral articles.
AQUEOUS POLYMER DISPERSIONS
WÄSSRIGE POLYMERDISPERSIONEN
DISPERSIONS AQUEUSES DE POLYMÈRE
WOLF THOMAS (author) / DENU HANS-JUERGEN (author) / DIMMER JOERG ALEXANDER (author) / WILLERICH IMMANUEL (author) / MOLLAT DU JOURDIN XAVIER (author)
2023-02-22
Patent
Electronic Resource
English
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C09D
Überzugsmittel, z.B. Anstrichstoffe, Firnisse oder Lacke
,
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS
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