Thermosetting polyimide composition, thermoset product thereof and manufacturing process thereof
AssigneeMatsushita Electric Works, Ltd.
InventorsHiroshi Yamamoto, Taro Fukui
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Abstract
A thermosetting polyimide composition is provided with a sufficient heat resistance and excellent mechanical and electrical characteristics in toughness, flexibility and so on and under severe environmental conditions, by adding to a polyfunctional unsaturated imide a thermosetting resin selected from the group consisting of polyetherimide, polyarylate and polyamideimide which are in a miscibility region with the polyfunctional unsaturated imide and have an excellent glass transition point and a number-average molecular weight of more than 10,000.
Claims9
An uncured thermosetting polyimide composition containing as essential components a poly-unsaturated imide represented by the following formula and a thermoplastic resin, wherein said thermoplastic resin is at least one selected from the group consisting of polyetherimide, polyarylate and polyamideimide having a number-average molecular weight of more than 10,000, ##STR24## in which "D" denotes a bivalent group having at least one carbon-carbon double bond, "R.sup.1 " denotes an x.sub.1 -valent organic group and "x.sub.1 " denotes an integer more than 1, said thermoplastic resin and said poly-unsaturated imide being present in a miscibilized region with the amount of said thermoplastic resin being 10 to 50 parts by weight with respect to 100 parts by weight of said poly-unsaturated imide and said composition is capable, after being cured, of forming a structure in which a phase mainly of a cured resin of poly-unsaturated imide and a phase mainly of thermoplastic resin are mutually separated and are regularly entangled with each other.
A thermoset product of a thermosetting polyimide composition containing as essential components a poly-unsaturated imide and a thermoplastic resin, wherein a phase mainly of polyimide and a phase mainly of said thermoplastic resin are mutually separated, both of said phases showing a sequential periodic distance and regularly entangling with each other.
A process for manufacturing a thermoset product containing a thermosetting polyimide composition comprising:
- combining a poly-unsaturated imide and a thermoplastic resin to form a solution such that said poly-unsaturated imide and said thermoplastic resin are miscibilized with each other, and
- thermosetting said solution to cause a phase mainly of polyimide and a phase mainly of said thermoplastic resin to be mutually separated, with said phases showing a sequential periodic distance and regularly entangling with each other.
Dependencies are inferred from the claim text.