Silicone stabilizers for flame-retarded rigid polyurethane...

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 75/04 (2006.01) C08G 18/08 (2006.01) C08G 18/16 (2006.01) C08J 3/20 (2006.01) C08J 9/228 (2006.01) C08K 5/5419 (2006.01) C08L 83/04 (2006.01) C09K 21/14 (2006.01)

Patent

CA 2589344

The invention relates to a process for producing rigid polyurethane or polyisocyanurate foams by reacting an isocyanate with a polyol in the presence of urethane and/or isocyanurate catalysts, water, optionally further blowing agents, optionally flame retardants and optionally further additives (e.g. fillers, emulsifiers, purely organic stabilizers and surfactants, viscosity reducers, dyes, antioxidants, UV stabilizers, antistatics) using foam stabilizers of the general formula (I) R-Si(CH3)2-O-[-Si(CH3)2-O-]n-[-Si(CH3)R- O-]m-Si(CH3)2-R, where R=-(CH2)x-O-(CH2-CHR'-O )y- R".

La présente invention a pour objet un procédé de production de polyuréthane ou de mousses de polyuréthane rigides en faisant réagir un isocyanate avec un polyol en présence d'uréthane et/ou de catalyseurs de type isocyanurate, de l'eau, éventuellement d'autres agents de gonflement, éventuellement des composés ignifuges et, éventuellement, d'autres additifs (p. ex. des matières de charge, des émulsifiants, des stabilisants et des agents tensio-actifs purement organiques, des réducteurs de viscosité, des pigments, des antioxydants, des stabilisants UV, des agents antistatiques), en utilisant des stabilisants pour mousse de formule générale (I) R-Si(CH3)2-O-¬-Si(CH3)2-O-|n-¬-Si(CH3)R- O-|m-Si(CH3)2-R, dans laquelle R = -(CH2)x-O-(CH2-CHR'-O )y-R".

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