Phthalic anhydride (P.A.) is the cornerstone of Stepan’s vertically integrated Polymers division. The phthalic anhydride plant is an integral part of the ISO 9001:2015 Stepan Millsdale site, located in Elwood, Illinois. P.A. is manufactured at this site to supply the internal requirements of the STEPANPOL® polyester polyols product line. In addition, Stepan is a major P.A. supplier to the North American merchant market.
End Use Markets
- Polyester resins
- Plasticizers
- Alkyd resin and coatings
- Polyester polyols
- Pigments and dyes
- Engineered plastics
- Flame retardants
Common Uses and Applications
- Boat hulls
- Shower stalls
- Flexible tubing and containers in the medical industry
- Wire coating and insulation
- Garden hoses
- Commercial and residential paint coatings
- Vinyl wallpaper
See all Stepan phthalic andydride products.