FIELD: chemistry of polymers, chemical technology.
SUBSTANCE: invention relates to the foaming agent compositions and to methods for preparing polymeric foams by using such foaming agent compositions, foaming polymeric composition comprising such foaming agents, and to polymeric foams comprising such foaming agents. The suitable combinations of foaming agents involve: (a) composition comprising above 50 wt.-% of carbon dioxide of the composition mass and above 0 wt.-% of at least one fluorinated hydrocarbon with the boiling point above 14°C but below 120°C; (b) composition comprising carbon dioxide and at least one fluorohydrocarbon with the boiling point above 30°C but below 120°C; (c) composition comprising carbon dioxide and at least one fluorohydrocarbon with the boiling point above 14°C and below 120°C and at least one fluorohydrocarbon with the boiling point below 14°C, and at least one additional foaming agent chosen from water, alcohols, ketones and aldehydes. Polymeric foams comprising the foaming agents compositions comprise additionally the infrared radiating blocking agent chosen from the group consisting of carbon black, graphite, gold, aluminum and titanium dioxide dispersed in the indicated polymer. Polymeric foams prepared by using the foaming agents compositions show heat conductivity value less 35 mWt/m x °K later 90 days after their preparing.
EFFECT: improved and valuable properties of composition and polymeric foam.
6 cl, 6 tbl
