FOAMED HEAT-INSULATING MATERIAL, PRODUCTION OF FOAMED HEAT-INSULATING MATERIAL, AND HEAT-INSULATED BOX

摘要

PROBLEM TO BE SOLVED: To provide a foamed heat-insulating material excellent in heat- insulating properties by removing carbon dioxide in the cells of the material with an alkali or alkaline earth metal hydroxide and removing water produced by a side reaction with a water adsorbent, thus filling the cells with a volatile blowing agent having a low thermal conductivity in the gaseous state, and by adding a metal compd. capable of neutralizing a carbonate to prevent the dissolution of the alkali component into soil after its disposed and to provide a process for producing the same. ;SOLUTION: This material 4 is a foamed polyurethane resin which has closed cells filled with a volatile blowing agent and contains a carbonate 1 formed by the reaction of an alkali or alkaline earth metal hydroxide with carbon dioxide, a metal compd. 8 capable of neutralizing the carbonate, and a water adsorbent comprising a water-absorbing substance 9 contg. water and covered with a resin film 10, each dispersed therein.;COPYRIGHT: (C)1998,JPO