公开(公告)号：WO2021092100A1

公开(公告)日：2021-05-14

申请号：PCT/US2020/059000

申请日：2020-11-05

Applicant: STEPAN COMPANY

Inventor： LISKEY, Carl William ,  KAPLAN, Warren A.

IPC: C08G18/46 ,  C08G18/76 ,  C08G73/10 ,  C08G73/16

Abstract: Rigid polyurethane or polyisocyanurate foams, polyester polyols used to produce them, and methods for formulating the foams are disclosed. The foams comprise a reaction product of a polyisocyanate, a polyester polyol, water, a surfactant, a catalyst and optional ingredients. The polyester polyols comprise a phthalimide-containing polyacid, a phthalimide-containing polyol, or a combination thereof. Rigid foams produced from the polyester polyols exhibit higher thermal stability and/or greater intumescence when compared with foams made from other polyester polyols. The phthalimide-containing polyester polyols should allow formulators to improve the flammability performance of rigid foams with reduced levels of flame retardants and/or lower index and should facilitate the production of thinner insulation panels.