公开(公告)号：AT337361T

公开(公告)日：2006-09-15

申请号：AT04731922

申请日：2004-05-10

Applicant: BASF AG

Inventor： PAKUSCH JOACHIM ,  KOPPERS MARKUS ,  GASCHLER WOLFGANG ,  SACK HEINRICH ,  SCHMIDT-THUEMMES JUERGEN ,  DENU HANS-JUERGEN

IPC: C04B24/26 ,  C08F6/00 ,  C08J3/12 ,  C08J3/16

Abstract: A process for preparing a polymer powder by evaporating the volatile constituents from an aqueous dispersion of a film-forming polymer P, wherein prior to the evaporation of the volatile constituents the aqueous polymer dispersion still comprises drying assistants T, present in an amount of from 0.1 to 80% by weight, based on the polymer P of the dispersion, and there being used as drying assistant T polyvinylformamide. The polyvinylformamide used preferably has a K value (KW), determined by the method of Fikentscher in accordance with DIN 53726, of from 5 to 50.

公开(公告)号：DE10213026A1

公开(公告)日：2003-10-02

申请号：DE10213026

申请日：2002-03-22

Applicant: BASF AG

Inventor： KOPPERS MARKUS ,  PAKUSCH JOACHIM ,  ANDERS HERMANN ,  SCHMIDT MARCO ,  DENU HANS-JUERGEN

IPC: C04B24/26 ,  C04B28/02 ,  C08F212/00 ,  C08F212/04 ,  C08F236/04 ,  C08F236/10 ,  C08F290/06 ,  C08F220/18 ,  C08F220/28

Abstract: Polymer dispersion contains a copolymer using as monomer, a conjugated aliphatic diene; a vinylaromatic monomer; an alkanediol monoester with (meth)acrylic acid, or an alkylpolyethylene glycol (meth)acrylate, or a mixture of monoester and acrylate; an ethylenically unsaturated monomer with an acid group or its salts; an unsaturated nitrile; and an unsaturated mono or dicarboxylic acid amide. A polymer dispersion containing at least one copolymer using as monomer (wt.%): (a) at least one conjugated aliphatic diene (25-70); (b) at least one vinyl aromatic monomer (25-70); (c) at least one 2-10C alkane diol monoester with (meth)acrylic acid (2.5-15); or (c') at least one alkylpolyethylene glycol (meth)acrylate (0.1-10) of formula (I); or, (c'') a mixture of monoester (c) and acrylate (c') (2-15); (d) an ethylenically unsaturated monomer with at least one acid group or its salts (0-1.0); (e) an ethylenically unsaturated nitrile (0-5.0); and (f) an amide of an alpha,beta-ethylenically unsaturated mono- or dicarboxylic acids (0-1.0). R1 = H or methyl; R2 = 1-4C alkyl; and n = 1-100. An Independent claim is included for a process for improving the mechanical strength, elasticity, and workability of building materials based on a hydraulic binder, where at least one hydraulic binder, at least one polymer dispersion, and/or a polymer powder or granulate, and optionally water and/or additives are mixed.