公开(公告)号：DE3143071A1

公开(公告)日：1983-05-11

申请号：DE3143071

申请日：1981-10-30

Applicant: BASF AG

Inventor： MEINELT WERNER ING GRAD ,  MATTHIAS KLAUS DIPL ING DR ,  FRANZMANN GERNOT DIPL CHEM DR ,  PETRI ROLF DIPL ING ,  KRAUS FRIEDRICH DIPL CHEM DR

IPC: C08L101/00 ,  C04B16/04 ,  C08F6/00 ,  C08J3/05 ,  C08J3/12 ,  C08L1/00 ,  C08L23/00 ,  C08L27/00 ,  C08L31/00 ,  C08L31/04 ,  C08L33/00 ,  C08L33/02 ,  C08L61/00 ,  C08L61/34 ,  C04B7/35 ,  C04B13/24 ,  C04B25/02 ,  C08L39/06 ,  C09J7/02

Abstract: The invention relates to a process for the preparation of blocking-resistant, water-dispersible polymer powders by spraying the aqueous polymer dispersions which contain an additive of a water-soluble copolymer comprising from 20 to 70% by weight of vinylpyrrolidone and from 30 to 80% by weight of vinyl acetate, and to the use thereof as additives for hydraulic binders.

公开(公告)号：DE3143070A1

公开(公告)日：1983-05-11

申请号：DE3143070

申请日：1981-10-30

Applicant: BASF AG

Inventor： MEINELT WERNER ING GRAD ,  MATTHIAS KLAUS DIPL ING DR ,  FRANZMANN GERNOT DIPL CHEM DR ,  PETRI ROLF DIPL ING ,  KRAUS FRIEDRICH DIPL CHEM DR

IPC: C08J3/05 ,  C08J3/12 ,  C04B7/35 ,  C04B13/24 ,  C04B25/02 ,  C08L61/18 ,  C09J7/02

Abstract: The invention relates to a process for the preparation of blocking-resistant, water-dispersible polymer powders by spraying aqueous polymer dispersions which contain an addition of water-soluble alkali metal salts and alkaline earth metal salts of naphthalenesulphonic acid/formaldehyde condensation products, and to the use thereof as additives for hydraulic binders.