PRODUCTION OF FLEXIBLE URETHANE FOAM

• Main Authors: UENO KAORU, SAKAI SEIJIRO, YONEYAMA MASAHIRO, NISHIOKA TOYOYASU, ABE HISASHI
• Format: Patent
• Language: English
• Published: 02.02.1993
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

PURPOSE:To produce a flexible urethane foam. CONSTITUTION:A process for producing a flexible urethane foam wherein at least one of the polyol components of the polyol composition comprises a polyether polyol (polyol A) which is formed by adding ethylene oxide to the interior of the molecule and adding propylene oxide to its terminal, has a primary hydroxyl concentration of 15wt.% or below, a hydroxyl value of 30-100 mgK0H/g and an ethylene oxide content of 5-30mol%, the polyol being used in an amount of 30wt.% or above based on the polyol composition, and the catalyst used is a mixture of a trimerization catalyst with a urethane formation catalyst. A flexible urethane foam excellent in properties can be obtained by using only water without using any halohydrocarbon.