Production of foam sheets of high compressive strength

Details Production of foam sheets of high compressive strength Production of foam sheets of high compressive strength

C - Chemistry, Metallurgy

08

J

C08J 9/12 (2006.01)

Patent

CA 2046127

Foam sheets of high compres- sive strength are produced by extruding a mixture of a styrene polymer and from 5 to 16 % by weight of a blowing agent mixture containing a) from 3 to 70 % by weight of an alcohol or ketone having a boiling point of from 56 to 100°C, b) from 5 to 50 % by weight of carbon dioxide and c) from 0 to 90 % by weight of a saturated C3- to C5- hydrocarbon and/or of a hydrogen-containing chloro- fluorocarbon or fluorinated hydrocarbon boiling at from -30° to +30°C.

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