Unsaturated Polyesters

Published January 1977

This supplement to Process Economics Program Report 26, issued in July 1967, reviews the commercial and technical developments in unsaturated polyester resins that occurred between mid-1967 and early 1976. It presents the process economics of producing a general purpose unsaturated polyester resin by a batch fusion process and a batch solvent process, each using glycol; a batch process and a continuous process, each using propylene oxide; and a continuous process using glycol. The industry status is updated and the recent developments in the formulation and preparation of low shrink/low profile resins, water-extended resins, flame- retardant resins, heat-resistant resins, and viscosity controls for unsaturated polyester resins are reviewed.

Other PEP Related Reports:

• Unsaturated Polyesters 26