Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1987-01-22
1989-05-09
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521902, 521123, 521130, C08K 900
Patent
active
048290971
ABSTRACT:
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.
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Ihanamaki Aimo
Jormalainen Eero
Linna Kauko
Pohjonen Timo
Tormala Pertti
Daley Dennis R.
Kight John
Oy Lohja AB
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