Thickener comprising at least one associative polymers based on monomers and are prepared by inverse emulsion polymerization of

摘要

1. A thickener, which may be prepared by a process characterized in that the polymer is obtained by inverse emulsion polimerizatsiia) at least one water-soluble, ethylenically unsaturated monomer comprising at least one anionic monomer and / or at least one nonionic monomer, b) at least one ethylenically unsaturated associative monomer, c) optionally at least one crosslinking agent, d) optionally at least one chain transfer agent, the m mperatura during the inverse emulsion polymerization is kept constant and is at least 40 ° C, and after closure of the inverse emulsion polymerization is carried out addition of an activator to give a thickener and wherein the thickener comprises at least one activator, and the activator is a surfactant. 2. Thickener according to Claim. 1, characterized in that the temperature during the inverse emulsion polymerization of 50-90 ° C.3. Thickener according to Claim. 1, characterized in that after the inverse emulsion polymerization and before addition of the activator is distilled off at least a partial amount of water and at least a partial amount of low boiling components fazy.4 oil. Thickener according to Claim. 1 or 2, characterized in that the method is based on the LDP technology (technology of liquid dispersion polymers) .5. Thickener according to Claim. 1 or 2, characterized in that the inverse emulsion polymerization of component b) is added to the oil fazu.6. Thickener according to Claim. 1 or 2, characterized in that the activator selecting