Thermosetting polyimide schiff base resins, their preparation an

Details Thermosetting polyimide schiff base resins, their preparation an Thermosetting polyimide schiff base resins, their preparation an

1990-04-02

1991-11-12

Kight, III., John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From ketone or ketene reactant

528226, 528228, 528229, 528230, 528244, 528246, 528247, 528248, 528266, 528353, C08G 1206

Patent

active

050649345

ABSTRACT:
Thermosetting Schiff base resins, their preparation and their applications re described.
These thermosetting Schiff base resins can be defined as responding to the general formula: ##STR1## Radicals Ar.sub.1, Ar.sub.2 and Ar.sub.3 are chosen so that the softening temperature of the resins is less than about 150.degree. C.
The resins can be prepared by direct condensation of an ethynyl benzaldehyde or acetophenone on a telechelic diamine oligomer obtained by reaction of a diamine containing flexibilizing groups on a derivative of benzhydrol tetracarboxylic acid. These Schiff base resins can be used by bulk thermal polymerization particularly to prepare adhesives or composite matrices.

REFERENCES:
patent: 4645821 (1987-02-01), Malinge et al.
patent: 4987218 (1991-01-01), Malinge et al.

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