Novel thickening polymer II
The invention relates to polymer that can be obtained by the radical emulsion polymerization of (A) at least one acidic vinyl monomer or the salt thereof; (B) at least one nonionic vinyl monomer, particularly preferably a hydrophobic nonionic vinyl monomer; (C) at least one monomer containing an uns...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to polymer that can be obtained by the radical emulsion polymerization of (A) at least one acidic vinyl monomer or the salt thereof; (B) at least one nonionic vinyl monomer, particularly preferably a hydrophobic nonionic vinyl monomer; (C) at least one monomer containing an unsaturated end group and a polyoxyalkylene part; (D) at least one crosslinking monomer; and (E) optionally, a protective colloid. The invention is characterized in that the polymerization is controlled such that (F) the gel effect occurs, at least at times, achieved by adding monomers of type (A), (B), and (C) (dosing time) within 120 minutes; and such that (G) the crosslinking monomer (D) is added, at the very earliest, 10 minutes after the first addition of the monomers (A), (B), and (C). |
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