近年来开发的磺化三聚氰胺甲醛水溶性树脂(简称“SM”),属阴离子系早强、非引气型,是混凝土高效减水剂中综合性能较为优良的外加剂品种。该产品首先由西德研制成功并取得专利,其后被日本、美国、英国等引进,逐步形成了具有特色的高效减水剂(超塑化剂)的系列产品。在重大工程上得到应用,在技术及经济上产生了明显效益。目前我国也开始生产该类产品,系由国家建材局苏州混凝土水泥制品研究院研制,由山西省临猗建材 The sulfonated melamine formaldehyde water-soluble resin (“SM”) developed in recent years is an early-strength, non-air-entraining type of anionic, and is an additive with excellent overall performance in concrete superplasticizers. This product was first successfully developed by West Germany and patented, and later introduced by Japan, the United States, the United Kingdom, etc., and gradually formed a series of high-performance superplasticizer (superplasticizer) products. Applied in major projects, it has produced significant technical and economic benefits. At present, China has also begun to produce this type of product, which was developed by the State Administration of Building Materials, Suzhou Concrete Cement Research Institute, and was built by Linfen, Shanxi Province.