Polyimide and process for producing the same
AssigneeSumitomo Chemical Company, Limited
InventorsMika Shirasaki, Mitsuhiro Shibata, Shuichi Kanagawa
Life of this patent
Estimating the term…
Abstract
A polyimide represented by the general formula (1): ##STR1## wherein Y represents a hydrocarbon group having 4 to 20 carbon atoms or a sulfur atom; each of R.sub.1 to R.sub.4, R.sub.i and R.sub.j represents a halogen atom, a hydrocarbon group having 1 to 6 carbon atoms or a halogen-containing hydrocarbon group having 1 to 6 carbon atoms; each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4; and X represents a tetravalent organic group having 2 or more carbon atoms.
Claims16
A polyimide represented by the general formula (1):
- ##STR6## wherein Y represents a hydrocarbon group having 4 to 20 carbon atoms or atom;
- each of R.sub.1 to R.sub.4, R.sub.i and R.sub.j represents a halogen atom, or a hydrocarbon group having 1 to 6 carbon atoms when the hydrocarbon group represents alkylidene group, any one of (R.sub.1).sub.c and (R.sub.2).sub.d, and any one of (R.sub.3).sub.e and (R.sub.4).sub.f is a halogen atom or a hydrocarbon group having 4 to 6 carbon atoms;
- each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4;
- and X represents a tetravalent organic group having 2 or more carbon atoms.
A process for producing a polyimide, which comprises reacting in an organic solvent an aromatic diamino compound represented by the general formula (2):
- ##STR9## wherein Y represents a hydrocarbon group having 4 to 20 carbon atoms or a sulfur atom;
- each of R.sub.1 to R.sub.4, R.sub.i and R.sub.j represents a halogen atom, a hydrocarbon group having 1 to 6 carbon atoms or a halogen-containing hydrocarbon group having 1 to 6 carbon atoms;
- each of a, b, c, d, e and f represents an integer of 0 to 4 satisfying a+b.ltoreq.4, c+d.ltoreq.4 and e+f.ltoreq.4;
- and X represents a tetravalent organic group having 2 or more carbon atoms, with a tetracarboxylic dianhydride represented by the general formula (3):
- ##STR10## wherein X is as defined above, and thereafter subjecting the resulting polyamic acid to thermal or chemical imidation.
Dependencies are inferred from the claim text.