Epichlorohydrin-carboxymethyl hydroxypropyl starch copolymer

Epichlorohydrin-carboxymethyl hydroxypropyl starch copolymer (CAS 69331-40-4) is a chemically modified starch derivative engineered to control flow behavior and stabilize dispersions in water-based formulations. It combines carboxymethyl and hydroxypropyl functionalities with crosslinking to deliver thickening and binding performance across demanding industrial systems. In construction, it functions as a rheology modifier.

It is used in tile adhesives, joint compounds, and cement-based mortars, improving workability and reducing slump. Pulp and paper manufacturers use it as a wet-end additive and surface sizing agent. This material enhances sheet strength and retention. In textile and leather processing, it acts as a sizing and finishing binder, improving fabric stiffness and surface uniformity during coating operations.

Home care and industrial cleaning formulations incorporate it to stabilize suspensions and adjust viscosity in liquid detergents and surface cleaners. It is supplied as a powder with specific particle size. Moisture content is specified to suit dry-blend or slurry preparation processes. Technical grade is the standard commercial offering, with product specifications typically defined by degree of substitution.

Viscosity grade and ionic character are also key metrics. Buyers should confirm crosslink density and substitution ratios directly with suppliers, as these parameters vary by intended application.