发明授权
- 专利标题: Preparation of polymer powders
- 专利标题(中): 聚合物粉末的制备
-
申请号: US09210765申请日: 1998-12-14
-
公开(公告)号: US06291573B1公开(公告)日: 2001-09-18
- 发明人: Joachim Pakusch , Bernd Reck , Peter Claassen , Hans-Jürgen Denu , Eckehardt Wistuba , Claudia Heibel
- 申请人: Joachim Pakusch , Bernd Reck , Peter Claassen , Hans-Jürgen Denu , Eckehardt Wistuba , Claudia Heibel
- 优先权: DE19757298 19971222
- 主分类号: C08L2904
- IPC分类号: C08L2904
摘要:
The present invention relates to a process for preparing polymer powders from aqueous polymer dispersions in which the dispersed polymer P comprises in copolymerized form: i) at least one vinylaromatic monomer (a), ii) 1,3-butadiene as monomer (b), and iii) one or more monomers (c) different than the monomers (a) and (b), which comprises drying the aqueous polymer dispersion in the presence of polyvinyl alcohol as drying agent. The present invention also relates to the polymer powders obtainable by this process and to the use of these polymer powders as binders in paints, varnishes and coating compositions generally, in adhesives, and for modifying mineral construction materials. The present invention also relates to mineral construction materials in the form of dry formulations comprising the polymer powders of the invention.