Fluorine - modified acid anhydrides

Details Fluorine - modified acid anhydrides Fluorine - modified acid anhydrides

1994-03-23

1994-11-08

Shaver, Paul F.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549215, C07F 708, C07F 718

Patent

active

053628870

ABSTRACT:
Novel fluorine-modified acid anhydrides of formula (1) are useful curing agents typically in epoxy resin compositions for encapsulating semiconductor devices. ##STR1## R.sup.1 is a hydrogen atom, substituted or unsubstituted monovalent hydrocarbon group, hydroxyl group, alkoxy group or alkenyloxy group. Rf is a divalent perfluoroalkylene or perfluoropolyether group of the general formula (2): ##STR2## wherein l is an integer of 0 to 8, k and m are integers of 0 to 15, j and n are 0 or 1, with the proviso that j, k, l, m and n are not equal to 0 at the same time.

REFERENCES:
patent: 4176124 (1979-11-01), Darms et al.
patent: 4261898 (1981-04-01), Darms et al.
patent: 4837339 (1989-06-01), Sato
patent: 5117001 (1992-05-01), Okinoshima et al.

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