申请人:BASF Aktiengesellschaft
公开号:US05972508A1
公开(公告)日:1999-10-26
The microcapsules containing bleaching agents are obtainable by polymerizing monomer mixtures which comprise 5-100% by weight of at least one ethylenically unsaturated carboxylic anhydride (a), 0-95% by weight of at least one monoethylenically unsaturated monomer (b) different from the monomers of group (a), 0-80% by weight of crosslinking monomers (c) which have at least two nonconjugated monoethylenic double bonds in the molecule, and 0-20% by weight of water-soluble monoethylenically unsaturated monomers (d), where the total of components (a) to (d) is 100% by weight. The polymerization takes place in the oil phase of a stable oil-in-water emulsion in the presence of free-radical polymerization initiators, where the temperature of the polymerizing reaction mixture is, where appropriate, increased continuously or periodically during the polymerization. The oil phase contains or consists of the bleaching aid.
含有漂白剂的微胶囊可通过聚合单体混合物获得,其中混合物包括重量百分比为5-100%的至少一种乙烯基不饱和羧酸酐(a),0-95%重量的至少一种与组(a)单体不同的单乙烯基不饱和单体(b),0-80%重量的交联单体(c),其分子中至少有两个非共轭的单乙烯基双键,以及0-20%重量的水溶性单乙烯基不饱和单体(d),其中组分(a)至(d)的总重量为100%。聚合反应发生在稳定的油包水乳液的油相中,在自由基聚合引发剂的存在下进行,聚合反应混合物的温度在适当情况下在聚合过程中连续或定期升高。油相包含或由漂白剂组成。