Menetelmä umpisoluisen fenolivaahdon valmistamiseksi

This invention relates to the manufacture of closed cell phenolic foams from low viscosity phenol-formaldehyde resole resin. This method of manufacture provides a foam which exhibits many of the advantageous characteristics of phenolic foams manufactured from high viscosity resole resin, including g...

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Bibliographic Details
Main Authors KYLE, THERESA M, MACPHERSON, EDWIN J, MEYNIER, PAUL J
Format Patent
LanguageFinnish
Swedish
Published 15.02.1995
Edition6
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:This invention relates to the manufacture of closed cell phenolic foams from low viscosity phenol-formaldehyde resole resin. This method of manufacture provides a foam which exhibits many of the advantageous characteristics of phenolic foams manufactured from high viscosity resole resin, including good thermal retention. There is provided a method of making a phenolic foam comprising the steps of mixing (a) a phenol-formaldehyde resole resin having a water content of approximately 7.5% and a viscosity of approximately 2,800 cps at 40 DEG C; (b) a high molecular weight gel forming ethylene oxide - propylene oxide block copolymer surfactant, such as Pluronic F-127 (trade mark); (c) a catalyst; (d) a blowing agent; and curing the resulting foam. c
Bibliography:Application Number: FI19880003958