专利名称：REDISPERSIBLE POLYMER POWDER发明人：WILLIMANN, Hongli,WICKI , Hans,HEINI,
Urs,ZAPF, Alexander,KOELLIKER, Robert
申请号：EP09769013.5申请日：20090625公开号：EP2300394A1公开日：20110330
摘要：The present invention pertains to a water-redispersible polymer powder basedon at least one modified natural latex. The modified natural latex can be obtained bymixing natural latex with at least one radical initiator and/or oxidizing agent, by mixingand reacting natural latex with at least one olefinically unsaturated monomer and with atleast one radical initiator, and/or by mixing natural latex with at least one filler.
Preferably, the polymer powder contains up to about 95 wt. % of least one natural latex,about 0 to 50 wt. % of at least one protective colloid, about 2 to 70 wt. % of at least onefiller and/or anti-caking agent, as well as optionally further additives. In addition, theinvention pertains to a process for the preparation of the polymer powder, the usethereof as an additive in building material compositions, as well as building materialcompositions containing the polymer powder.
申请人：Akzo Nobel N.V.
地址：Velperweg 76 6824 AB Arnhem NL
国籍：NL
代理机构：Alferink, Petrus J.T.
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