elastilisers

Elastisers (also spelled elasticisers) are additives used to increase the elasticity and flexibility of materials, most commonly polymers and elastomers. They work by reducing intermolecular forces and increasing the mobility of polymer chains, often by inserting flexible segments or disrupting crystallinity, thereby lowering the glass transition temperature and enabling deformation under smaller forces.

They come in several forms. Low-molecular-weight liquid plasticizers such as phthalates, adipates, and citrates are widely used in PVC and other plastics to improve processability and flexibility. Polymeric elastisers, including grafted or block copolymer plasticizers, offer reduced migration and longer-term compatibility. Oil-based and hydrocarbon plasticizers are used when softer materials are needed. In solvent-free systems, reactive or covalently bonded plasticizers can be incorporated to minimize migration.

Applications span many industries. In plastics and coatings, elastisers enable flexible films, cords, and seals. In adhesives and sealants, they improve tack, elongation, and resistance to cracking. In textiles and foams, elastisers improve stretch and comfort. The choice of elastiser depends on compatibility with the base material, desired level of softness, processing conditions, and regulatory considerations.

Safety and regulation address health concerns associated with certain plasticizers, notably some phthalates, which have led to restrictions in consumer products. Safer alternatives and regulatory compliance are increasingly prioritized.

See also: plasticizer, softening agent, polymer additive.