Elastomer toughened polyimide adhesives

Details Elastomer toughened polyimide adhesives Elastomer toughened polyimide adhesives

1981-10-02

1983-06-21

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524726, 524104, 524173, 525181, 525183, 525184, 525474, C08K 520

Patent

active

043895042

ABSTRACT:
A rubber-toughened addition-type polyimide composition having excellent high temperature bonding characteristics in the fully cured state and improved peel strength and adhesive fracture resistance physical property characteristics is disclosed. The process for making the improved adhesive involves preparing the rubber-containing amic acid prepolymer by chemically reacting an amine-terminated elastomer and an aromatic diamine with an aromatic dianhydride with which a reactive chain stopper anhydride has been mixed, and utilizing solvent or mixture of solvents for the reaction.

REFERENCES:
patent: 3440203 (1969-04-01), Boldebuck et al.
patent: 4030948 (1977-06-01), Berger

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