Process for the production of monoblocked diisocyanates

Details Process for the production of monoblocked diisocyanates Process for the production of monoblocked diisocyanates

1988-09-13

1992-09-22

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

560330, 560336, 560355, 540527, 540531, C07D22310, C07D22312, C07C24900, C07C25100

Patent

active

051498057

ABSTRACT:
Monoblocked diisocyanates which contain little free and diblocked diisocyanate are obtained by a process which involves adding 1 mole of a blocking agent to a diisocyanate which is present in excess and subsequently removing the excess diisocyanate by thin film evaporation. The compounds produced are useful for the production of cataphoresis resins.

REFERENCES:
patent: 2723265 (1955-11-01), Stallmann
patent: 3723372 (1973-03-01), Wakimoto et al.
patent: 3926875 (1975-12-01), Tsugukuni et al.
patent: 4292350 (1981-09-01), Kubitza et al.
patent: 4920173 (1990-04-01), Gras

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