C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/79 (2006.01) C07D 251/34 (2006.01) C08G 18/09 (2006.01) C08G 18/10 (2006.01)
Patent
CA 2442251
this invention relates to storage-stable, liquid, partially trimerized polyisocyanates having an NCO group content of 24 to 40 % by weight, and comprising 20 to 88 % by weight of toulene diisocyanate and 12 to 80 % by weight of a polyisocyanate of the diphenylmethane series. The present invention also relates to a process for the preparation of the storage-stable, liquid, partially trimerized polyisocyanates; to storage-stable, liquid urethane prepolymers of these partially trimerized polyisocyanates; and to a process for the production of these storage-stable, liquid, urethane prepolymers.
La présente invention concerne des polyisocyanates partiellement trimérisés, à l'état liquide et stables au stockage présentant une teneur en groupe NCO comprise entre 24 et 40 % en poids et contenant 20 à 88 % en poids de toluène diisocyanate et 12 à 80 % en poids de polyisocyanate de la série des diphénylméthanes. La présente invention se rapporte en outre à un procédé de préparation desdits polyisocyanates partiellement trimérisés, à l'état liquide et stables au stockage ; à des prépolymères d'uréthane liquides et stables au stockage de ces polyisocyanates partiellement trimérisés ; et à un procédé de production de ces prépolymères d'uréthane liquides et stables au stockage.
Kemp Hersel T. II
Slack William E.
Yonek Kenneth P.
Bayer Materialscience Llc
Bayer Polymers Llc
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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