Polycarboxylate one amphoteric betaines and preparation method

The present invention relates to an amphoteric betaine Polycarboxylate its preparation method unsaturated polyethers, and amphoteric monomers dodecyl dimethyl betaine, hydrogen peroxide solution as a substrate, then a solution of was added acrylic acid solution a and solution B by the vitamin C, consisting of thioglycolic acid, stir at room temperature synthesized by radical polymerization polycarboxylate amphoteric betaine. Advantageous effects of the present invention are: to synthesize at room temperature, short reaction time, increase production efficiency, and environmental protection; superplasticizer of the present invention synthesized in high water reduction, slump and good performance.