Oy Lohja Ab

Eero Jormalainen

Timo Pohjonen

Pertti Tormala

Aimo Ihanamaki

Kauko Linna

The invention relates to a process for the preparation of novel isocyanurate modified polyurethane foams, which process is characterized in that an organic polyisocyanate is reacted with a polyol in the presence of a catalyst system and a blowing agent, eventually in the presence of a filler material and/or an emulsifying agent, wherein said polyol contains 5 to 100% by weight of an oil, resin or a mixture of resins originating from soft wood and/or a chemically modified resin or oil, and wherein said polyol contains in its molecular structures hydroxl groups capable of reacting with isocyanate groups, and the catalyst system contains 5 to 95% by weight of trimerization catalyst of the polyisocyanate, which catalyst causes cross-linked polyisocyanurate structures containing isocyanurate rings to be formed from the polyisocyanate in the polymer structure, and to novel isocyanurate modified polyurethane foams prepared by the process.

Growing community of inventors

Kankaanpaa, Finland

Eero Jormalainen