Melamine-formaldehyde-sodium bisulfite copolymer

Melamine-formaldehyde-sodium bisulfite copolymer (CAS 64787-97-9), also known commercially as melamine formaldehyde sulfonate sodium salt, is a sulfonated aminoplast polymer used as a dispersant and flocculant.

Its sulfonated structure provides strong affinity for multivalent ions and suspended particulates, making it effective in both process water management and surface treatment applications across water-intensive industries.

In textile and leather processing, it functions as a dispersant for dyes and finishing auxiliaries, improving dye uptake uniformity and reducing bath waste during the manufacturing process.

Pulp and paper manufacturers apply it as a retention aid and drainage improver, helping control fiber fines and filler distribution on the wire for better sheet formation and quality.

Water treatment operations use it for coagulation and flocculation of colloidal suspensions, particularly in industrial effluent streams carrying heavy metal ions or significant organic load.

It also acts as a sequestrant in process water circuits, preventing scale deposition from calcium and magnesium hardness. This ensures equipment longevity and maintains optimal flow rates in systems.

Supplied primarily as an aqueous solution, with solid powder forms available for specific logistics. Technical grade is the standard commercial specification for industrial supply chains.

Concentration and molecular weight variants exist to meet different viscosity and performance targets across end-use sectors, allowing for precise formulation in various industrial environments.