Preparation of flame-resistant soft polyurethane foams of...

C - Chemistry – Metallurgy – 09 – K

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C09K 21/10 (2006.01) C08G 18/38 (2006.01) C08G 18/65 (2006.01) C08K 3/04 (2006.01) C08K 3/32 (2006.01) C08K 5/34 (2006.01) C08K 5/3492 (2006.01) C08K 13/02 (2006.01)

Patent

CA 2054287

A process for the preparation of flame-resistant soft polyurethane foams which produce less smoke in the event of fire involves reacting a) an organic polyisocyanate and/or a modified organic polyisocyanate with b) a high-molecular-weight compound containing at least two reactive hydrogen atoms and, if desired, c) a chain extender and/or crosslinking agent, in the presence of d) a mixture of flameproofing agents which contains: di) melamine dii) expandable graphite and, if desired, diii) at least one further flameproofing agent, preferably a modified or unmodified ammonium polyphosphate, e) a blowing agent, f) a catalyst and, if desired, g) assistants and/or additives, and melamine/expandable graphite/polyether-polyol dispersions which are suitable for this purpose.

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