Heat-resistant adhesive
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsShoji Tamai, Katsuaki Iiyama, Akihiro Yamaguchi
Life of this patent
Estimating the term…
Abstract
A polyimide-based heat-resistant adhesive having excellent peel strength and heat resistance comprising polyimide composed of 10 to 99% by mole of structural units having the formula (1) and 1 to 90% by mole of structural units having the formula (2) or comprising polyamic acid precursor which corresponds to the polyimide. ##STR1##
Claims6
A heat-resistant adhesive essentially consisting of a polyimide comprising in a polymer molecule from 10 to 99% by mole of structural units having the formula (1):
- ##STR13## and from 1 to 90% by mole of structural units having the formula (2):
- ##STR14##
A polyimide-based heat-resistant adhesive essentially consisting of a polyamic acid comprising in a polymer molecule from 10 to 99% by mole of structural units having the formula (3):
- ##STR15## and from 1 to 90% by mole of structural units having the formula (4):
- ##STR16## and a varnish comprising said polyamic acid.
A heat-resistant adhesive essentially consisting of a polyimide obtained by thermally or chemically imidizing a polyamic acid comprising in a polymer molecule from 10 to 99% by mole of structural units having the formula (3):
- ##STR17## and from 1 to 90% by mole of structural units having the formula (4):
- ##STR18## said polyamic acid having an inherent viscosity of from 0.1 to 3.0 dl/g which is measured at 35.degree. C. by dissolving said polyamic acid in N,N-dimethylacetamide to a concentration of 0.5 g/100 ml.
A heat-resistant adhesive consisting essentially of a polyimide comprising from 20 to 70% by mole of structural units having the formula (1):
- ##STR19## and from 30 to 80% by mole of structural units having the formula(2):
- ##STR20##
A polyimide-based heat-resistant adhesive consisting essentially of a polyamic acid comprising from 20 to 70% by mole of structural units having the formula (3):
- ##STR21## and from 30 to 80% by mole of structural units having the formula (4) ##STR22## and a varnish comprising said polyamic acid.
Dependencies are inferred from the claim text.