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1. (WO2017058550) RIGID POLYURETHANE FOAM COMPRISING POLYESTER POLYETHER POLYOL

Pub. No.:    WO/2017/058550    International Application No.:    PCT/US2016/052478
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Tue Sep 20 01:59:59 CEST 2016
IPC: C08G 18/48
C08G 18/76
C08J 9/14
C08G 18/18
C08G 18/42
Applicants: DOW GLOBAL TECHNOLOGIES LLC
Inventors: GOLINI, Paolo
GIROTTI, Cecilia
Title: RIGID POLYURETHANE FOAM COMPRISING POLYESTER POLYETHER POLYOL
Abstract:
Polyurethane foams are provided. The polyurethane foams are produced from a formulation that includes an isocyanate reacting mixture, an isocyanate component, and a blowing agent. The isocyanate reacting mixture includes at least 40 wt% of at least one propoxylated polyester-polyether polyol based on the total weight of the isocyanate reacting mixture. The isocyanate reacting mixture also includes at least one of propoxylated sucrose polyol or propoxylated sorbitol polyol. The propoxylated sucrose polyol and/or propoxylated sorbitol polyol has a hydroxyl number of from about 300 mg KOH/g to about 600 mg KOH/g. The polyurethane foam has a compressive strength of at least 130 kPa, and a stoichiometric index of the isocyanate component to the isocyanate reacting mixture is between about 1.0 and 1.7.