JPH058210B

PURPOSE:To obtain a polyurethane foam from waste PETR, etc., effectively and easily, by using a prepolymer obtained by reacting a terephthalate polyol composition with an organic polyisocyanate and a compound containing active hydrogen. CONSTITUTION:The prepolymer of a terephthalate polyol compositi...

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Bibliographic Details
Main Authors EZAKI SEIJI, NOZAWA TOSHIO, FUJINO HIROSHI, TOKORO NOBUO
Format Patent
LanguageEnglish
Published 01.02.1993
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
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
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Summary:PURPOSE:To obtain a polyurethane foam from waste PETR, etc., effectively and easily, by using a prepolymer obtained by reacting a terephthalate polyol composition with an organic polyisocyanate and a compound containing active hydrogen. CONSTITUTION:The prepolymer of a terephthalate polyol composition obtained by the hydrolysis of a polyalkylene terephthalate in a polyol, or a mixture of the prepolymer and an organic isocyanate, is made to react with a compound having >=2 active hydrogen atoms. The polyol is preferably a 2-4-functional polyol. The terephthalate polyol composition is preferably the one having a viscosity of 500-50,000cps/25 deg.C and a hydroxyl value of 100-600mg-KOH/g. The prepolymer is mixed with the organic isocyanate at a weight ratio of 90:10-10:90.
Bibliography:Application Number: JP19830224475