Stepan Company is a leading manufacturer of polyester polyols, specialty polyurethane foam systems and phthalic anhydride (P.A.). We marry our innovative STEPANPOL® polyol chemistry, vertically integrated supply chain, customized STEPANFOAM® systems and market leading technical service to meet the needs of our global customers.
STEPANPOL polyester polyols find a wide range of utility in both polyurethane and polyisocyanurate applications. We offer a full range of aromatic and aliphatic polyester polyols for use in rigid and flexible foams, as well as many C.A.S.E. (coatings, adhesives, sealants and elastomers) applications. Stepan's comprehensive line of polyester polyols provides excellent insulation and mechanical properties while offering superior processability and applied economics. Our global network of ISO 9001:2008 registered manufacturing plants ensures that you receive material of the highest quality and consistency.
Stepan Company also manufactures STEPANFOAM systems, which include products for commercial roofing, wall insulation, pre-insulated pipe and other industrial applications, as well as Engineered Specialty Foams for use in a variety of aerospace, defense and other specialty composites makets.
Phthalic anhydride (P.A.) is an important part of Stepan’s Polymers division. In addition to being used in many of our polyester polyol chemistry, phthalic anhydride is a key raw material for plasticizers and unsaturated polyester resins. Stepan manufactures P.A. in its ISO 9001:2008 certified production site in Millsdale, Illinois.