Polyimide adhesive from lactam, aromatic dianhydride, aliphatic

Details Polyimide adhesive from lactam, aromatic dianhydride, aliphatic Polyimide adhesive from lactam, aromatic dianhydride, aliphatic

1982-09-27

1984-04-10

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

139383R, 428457, 4284735, 528125, 528126, 528170, 528222, 528228, 528317, 528322, 528324, C08G 6914

Patent

active

044422830

ABSTRACT:
Modified polyimide adhesives useful for high efficiency bonding at moderate temperatures. Basically, the adhesives are prepared by reacting suitable quantities of an oxime, an aromatic tetracarboxylic acid dianhydride and an aliphatic tetracarboxylic acid dianhydride, esterifying the resulting bisimide with a reactive solvent esterifying agent and mixing therewith a suitable diamine. This copolyimide adhesive may be dried to a selected viscosity before or after coating onto one or both surfaces to be bonded together. When the surfaces are pressed together under moderate pressure and heated for a suitable period at a temperature in the range of about 230.degree. to 320.degree. C. an excellent, flexible bond is obtained, having high peel strength and excellent resistance to high temperatures.

REFERENCES:
patent: 4161477 (1979-07-01), Long et al.
patent: 4183838 (1980-01-01), Gagliani
patent: 4183839 (1980-01-01), Gagliani

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