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发明公开
CN105566572A 一种马来酸酐接枝型聚羧酸保塑剂及其制备方法 无效 - 驳回

一种马来酸酐接枝型聚羧酸保塑剂及其制备方法
摘要：
本发明公开了一种马来酸酐接枝型聚羧酸保塑剂及其制备方法。首先，通过金属盐催化方法，以马来酸酐、纤维素羟丙基甲基醚和亚磷酸为原料，在60~100℃合成中间体聚酯。然后，聚酯与不饱和酸类单体、不饱和聚氧乙烯类大单体、丙烯酰胺类单体、引发剂等原料，在40~70℃下，经水溶液聚合、中和后得到马来酸酐接枝聚羧酸保塑剂。本发明制备的中间体聚酯具有增加新拌砂浆塑性稳定性的效果，最终产物马来酸酐接枝型聚羧酸保塑剂则对新拌砂浆具有较好分散性、保塑性和增稠性的综合效果。且本发明的马来酸酐接枝型聚羧酸保塑剂无毒、无臭，与水泥相容性好，不降低水泥硬化性能，是一种绿色环保产品，预期在湿拌砂浆领域有极大潜在应用价值。
摘要（英）：

The invention discloses a maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent and a preparation method thereof. The method comprises the following steps: synthesizing an intermediate polyester from maleic anhydride, cellulose hydroxypropyl methyl ether and phosphorous acid at 60-100 DEG C by a metal salt catalytic process; and carrying out water solution polymerization on the polyester, unsaturated acid monomer, unsaturated polyoxyethylene large monomer, acrylamide monomer, initiator and other raw materials at 40-70 DEG C, and neutralizing to obtain the maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent. The intermediate polyester has the effect of increasing the plasticity stability of the freshly mixed mortar; and the end product maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent has the comprehensive effects of favorable dispersity, plasticity maintaining property and thickening property on the freshly mixed mortar. The maleic-anhydride-grafted polycarboxylic acid plasticity-maintaining agent has the advantages of no toxicity or odor and favorable compatibility with cement, does not lower the hardening property of cement, is a green environment-friendly product, and is expected to have great potential application value in the field of wet mixed mortar.

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