Sulphonated Melamine Formaldehyde (SMF)

• Efficient water reduction. Adding melamine based superplasticizer can significantly reduce the water consumption of concrete and improve the strength and durability of concrete. At the same time, the production costs of coatings and papers can be reduced, and their quality and performance can be improved.
• Strong adaptability. High-efficiency sulphonated melamine formaldehyde has good adaptability in different types of concrete, coatings and papers, and can meet the needs of different fields and products.
• The mixing amount is small. Since the melamine based superplasticizer has a high water-reducing rate, in practical applications, a small amount can be added to achieve the desired water-reducing effect.
• Good stability. SMF sulphonated melamine formaldehyde powder has good stability during storage and use, has little impact on environmental factors such as temperature and humidity, and can be stored and used for a long time.
• Good compatibility. This product has good compatibility with other water reducing admixtures (such as naphthalene based superplasticizer, polycarboxylic acid superplasticizer, aliphatic superplasticizer, sulfamate water reducing agent)and can be used Used to adjust the comprehensive performance of other water reducing agents.
• Environmental friendly. The raw materials used in the synthesis process of melamine superplasticizer are all environmentally friendly raw materials and have little impact on the environment and human health. In addition, the SMF superplasticizer can produce less waste during production and use, which is beneficial to environmental protection.

Melamine based superplasticizer is a concrete admixture containing melamine groups. Its molecular structure contains active groups such as amino, carbonyl and hydroxyl groups. These groups can react with calcium ions, silicon ions, etc. in cement to form anchoring complexes, thereby enhancing the dispersion and flow of concrete. sex. In addition, the crystal structure of sulphonated melamine formaldehyde superplasticizer also has special properties. Its crystal surface has a high negative charge density, which can generate electrostatic attraction with the surface of positively charged sand and gravel, further improving the dispersion and fluidity of concrete.

The main raw materials for preparing sulphonated melamine formaldehyde superplasticizer include melamine,formaldehyde, sulfonate, etc. During the preparation process, melamine and formaldehyde are first subjected to a condensation reaction under acidic conditions to generate a pre-condensate. The precondensate and sulfonate are then subjected to a sulfonation reaction under alkaline conditions to finally generate a melamine superplasticizer. Among them, the reaction mechanism involves multiple steps such as the condensation of amino groups and formaldehyde and the reaction of sulfonate groups and amino groups. Key parameters in the preparation process include temperature, pH value, reaction time, etc., which need to be strictly controlled to obtain high-quality products.