Process for the production of uretdione group-containing polyiso

Details Process for the production of uretdione group-containing polyiso Process for the production of uretdione group-containing polyiso

1985-05-21

1986-06-17

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D49900

Patent

active

045955344

ABSTRACT:
The present invention relates to a process for the production of uretdione group-containing polyisocyanates having aliphatically- and/or cycloaliphatically-bound isocyanate groups by dimerizing a portion of the isocyanate groups of organic diisocyanates having aliphatically- and/or cycloaliphatically-bound isocyanate groups in the presence of a dimerization-accelerating catalyst and terminating the dimerization reaction when the desired degree of dimerization in each case has been reached by addition of a catalyst poison or by the removal of the catalyst by distillation, characterized in that antimony(V)fluoride is used as the catalyst.

REFERENCES:
patent: 3108100 (1953-10-01), Tate et al.
Olah, Friedel-Crafts and Related Reactions, vol. 1 (1963) pp. 228, 270.

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