Urethane-modified polyisocyanurate foam

Details Urethane-modified polyisocyanurate foam Urethane-modified polyisocyanurate foam

C - Chemistry, Metallurgy

08

G

C08G 18/78 (2006.01) C08G 18/32 (2006.01) C08G 18/40 (2006.01) C08G 18/54 (2006.01) C08G 18/68 (2006.01)

Patent

CA 2363791

A urethane-modified polyisocyanurate foam obtained by reacting (A) a polyisocyanate compound component, (B) a polyol component, containing a modified phenolic resin obtained by adding 20 to 100 parts by weight of a polyhydric alcohol or its alkylene oxide adduct to 100 parts by weight of a benzylic ether type phenolic resin and heating under a reduced pressure, in an amount of at least 3 wt% to the total resin component, (C) water and (D) a foam stabilizer comprising a mixture of at least 2 silicone type surfactants having different surface tensions wherein a surfactant having a higher surface tension has a surface tension of higher than 22 dyne/cm and a surfactant having a lower surface tension has a surface tension of at most 22 dyne/cm, in the presence of (E) a urethane-forming catalyst and/or a trimerization catalyst.

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