申请人:WARWICK INTERNATIONAL GROUP LIMITED(Company No. 2754514)
公开号:EP0534772A3
公开(公告)日:1994-11-09
A polyacid polyanhydride is used as a bleach activator especially for improving low temperature bleaching performance of peroxygen bleaches such as hydrogen peroxide or sodium perborate, in laundry and other detergent formulations. The polyanhydrides are preferably made from polybasic, usually dibasic, carboxylic acids, which may be aliphatic and/or aromatic in nature. The polyanhydride may be a homopolymer or a copolymer and has at least 2 monomer units on average per chain. The polyanhydride is preferably made by reacting the free dibasic acids with excess acetic anhydride and refluxing until the desired molecular weight is achieved followed by removal of acetic acid formed and excess acetic anhydride. Examples of polyanhydrides are polymers of sebacic, adipic, azelaic, succinic, fumaric, iso- and per-phthalic and citric acids. The polyanhydrides are solids which are easy to handle, relatively storage stable and give bleach activation.
聚酸酐聚合物被用作漂白剂活化剂,特别是用于提高过氧化物漂白剂(如双氧水或过硼酸钠)在洗涤剂和其他清洁剂配方中的低温漂白性能。聚酸酐通常由多元(通常是二元)羧酸制成,这些羧酸可以是脂肪族和/或芳香族的。聚酸酐可以是均聚物或共聚物,并且每个链上平均至少有2个单体单位。聚酸酐通常是通过将游离的二元酸与过量的乙酸酐反应并回流,直到达到所需的分子量,然后去除形成的乙酸和过量的乙酸酐来制备的。聚酸酐的例子包括庚二酸、己二酸、癸二酸、琥珀酸、富马酸、异和邻苯二甲酸和柠檬酸的聚合物。聚酸酐是易于处理、相对稳定的固体,并且能够提供漂白活性。