Process for the production of foams

Details Process for the production of foams Process for the production of foams

C - Chemistry, Metallurgy

08

J

403/43, 18/675

C08J 9/34 (2006.01) C08J 9/08 (2006.01)

Patent

CA 1095649

Abstract of the Disclosure This invention relates to a process for the production of polyurethane foams in closed molds using mixtures of organic polyisocyanates with certain compounds which liberate carbon dioxide under the catalytic influence of basic compounds. In this process a mixture of poly- isocyanates and compounds which liberate carbon dioxide under the catalytic influence of basic compounds is reacted with organic compounds containing hydrogen atoms which are reactive with isocyanate groups, which organic compounds are mixed with basic compounds and/or have basic compounds chemically built into them. The process is suitable for the production of any polyurethane foams in a closed mold, but is preferably applied to the production of semi-hard and particularly of hard polyurethane foams having a dense outer skin. The process may be adjusted to produce hard products for the manufacture of furniture parts, car bodies, technical equipment and structural elements. It may also be adjusted to produce semi-hard to soft products for the manufacture of safety padding in the construction of motor vehicles, elastic shoe soles, bumpers, etc.

253239

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