Styrene-acrylonitrile resin

Styrene-acrylonitrile resin (CAS 9003-54-7), commonly known as SAN or AS resin, is a rigid thermoplastic copolymer used across packaging, automotive, and electronics manufacturing. It delivers higher chemical resistance and clarity than standard polystyrene.

This material is a preferred base where transparency and structural integrity are both required. In consumer packaging and housewares, SAN is injection-molded into transparent containers, bottles, and kitchenware that must withstand contact with oils.

These products are designed to resist detergents and mild solvents during regular use. Automotive manufacturers use it for interior trim components, instrument panels, and light covers where dimensional stability under heat is a priority.

In electronics, SAN is specified for housings and connectors that require good surface finish and resistance to processing chemicals. It also functions as a matrix component or impact modifier carrier in ABS systems.

The resin influences melt flow and stiffness balance in compounded formulations. Styrene-acrylonitrile resin is supplied as pellets or granules, the standard form for injection molding and extrusion processing workflows.

Acrylonitrile content typically ranges from 20–30%, with grade selection directly affecting chemical resistance and heat deflection performance. Technical and engineering grades are available for various industrial needs.

Some producers offer food-contact compliant specifications for packaging applications. These materials meet rigorous safety requirements for use in the global food and beverage supply chain and consumer goods sectors.