公开(公告)号：DE59606404D1

公开(公告)日：2001-03-08

申请号：DE59606404

申请日：1996-10-31

Applicant: BASF AG

Inventor： SCHMIDT-THUEMMES DR ,  WISTUBA DR ,  DRAGON ANDREE ,  ANSELMANN THOMAS

IPC: C08K3/28 ,  C08F2/22 ,  C08F212/00 ,  C08F212/06 ,  C08F212/08 ,  C08F236/10 ,  C08K3/00 ,  C08K5/17 ,  C08L25/00 ,  C08L25/02 ,  C09D5/00 ,  C09D109/06 ,  C09D109/08 ,  C09D125/00 ,  C09D125/02 ,  C09D125/10

Abstract: Aqueous polymer dispersions (I), containing a radical copolymer (CP) with an alkali metal ion content (GA) of not more than 0.5 wt.%, based on (A) 20-65 wt.% vinylaromatic monomer(s), (B) 35-80 wt.% comonomer(s) with two conjugated double bonds and (C) 0-10 wt.% other comonomers with at least one double bond. Also claimed are (i) aqueous polymer preparations containing (I) and finely divided pigment in amounts of up to 60 vol.% (IIA) or 20-45 vol.% (IIB); (ii) substrates coated with a film of (I) or (II), and (iii) a process for the production of (I) by radical- initiated aqueous emulsion polymerisation of the above comonomers, with the addition of ammonia and/or organic amine to increase the pH of the dispersion medium.

公开(公告)号：DE50109249D1

公开(公告)日：2006-05-11

申请号：DE50109249

申请日：2001-01-23

Applicant: BASF AG

Inventor： SCHMIDT-THUEMMES DR ,  WIRTH DR ,  KIRSCH DR

IPC: D21H19/58

Abstract: The present invention provides paper coating slips comprising a low-crosslink copolymer as their binder.

公开(公告)号：DE50204841D1

公开(公告)日：2005-12-15

申请号：DE50204841

申请日：2002-10-17

Applicant: BASF AG

Inventor： KOPPERS DR ,  SCHMIDT MARCO ,  ANSELMANN THOMAS ,  SCHMIDT-THUEMMES DR ,  ZOTT MIKE ,  WISTUBA DR

IPC: C08K3/10 ,  C08F212/04 ,  C08F220/00 ,  C08F236/04 ,  C08F236/10 ,  C08L25/10 ,  C09D125/08 ,  C08F212/08 ,  C09D109/08 ,  C09D125/10

Abstract: An aqueous polymer dispersion with a polymerisate in disperse distribution in a radically polymerized form is synthesized from at least one vinyl aromatic monomer A; a doubly conjugated ethylenically unsaturated monomer B; and a monomer C selected from alpha, beta-monoethylenically unsaturated mono- and dicarboxylic acids or their amide or ester derivatives. An aqueous polymer dispersion with a polymerisate in disperse distribution in a radically polymerized form synthesized from (wt.%): at east one vinyl aromatic monomer (monomer A)(20-65); at least one doubly conjugated ethylenically unsaturated double bonded monomer (monomer B)(30-75); and at least one other monomer (monomer C)(0.5-10) selected from alpha,beta-monoethylenically unsaturated mono- and dicarboxylic acids or their amide or ester derivatives, and their content GA of alkali metal ion, relative to the weight of dispersed polymerisate is ≥ 0.5 wt.% , where the pH of the aqueous dispersion medium is set at a value lower than 6 is new. An Independent claim is included for preparation of the aqueous polymer dispersion by radical emulsion polymerization of the starting monomers A, B, and C in the required ratios for production of the polymer, with setting of the pH of the aqueous dispersion medium at below 6 by addition of a specific amount of aqueous alkali metal hydroxide solution.