WESTON® 439 phosphite ester by SI Group is phosphite antioxidant used to improve the color and light stability & clarity of rigid PVC and rigid vinyl chloride copolymers. It is used for food packaging applications... view more

WESTON™ 618F by SI Group is a phosphite-based antioxidant. It is highly effective color & molecular weight stabilizer for polyolefins, polyesters, elastomers, styrenics and engineering... view more

WESTON™ 619F by SI Group is a phosphite-based antioxidant. It is highly effective color & molecular weight stabilizer for polyolefins, polyesters, elastomers, styrenics and engineering... view more

WESTON™ 705 by SI Group is a phosphite-based antioxidant. It is highly effective color and molecular weight stabilizer for polyolefins and elastomers. It is a nonylphenol free liquid phosphite. It... view more

WESTON™ 705T by SI Group is a nonylphenol-free liquid phosphite antioxidant. It is useful in a variety of other polymer applications such as SBR, NBR, EPDM, BR, SBC, SBS, SIS, ABS, natural rubber... view more