Showa Denko K.k.

Tokyo Institute of Technology

Sakuji Ikeda

Hideki Shirakawa

Makoto Sasaki

Kazuo Soga

Tsutomu Mizoroki

Makoto Okawara

Masahiro Uchino

Atsumu Ozaki

Noboru Kawata

Process for molding an acetylene high polymer by press-forming a gel-like composition composed of 5 to 95% by weight of an acetylene high polymer having a fibril structure and 95 to 5% by weight of an organic solvent.

Process for producing a gel-like composition of a high polymer of

This invention relates to a process for producing an organic semiconductor. More specifically, it relates to a process for producing an electrically conductive acetylene high polymer, which comprises doping an acetylene high polymer having a fibrous microcrystalline (fibril) structure with a specified electron acceptor compound, having low toxicity, to obtain an electrically conductive acetylene high polymer having an increased electrical conductivity, and flexibility and heat stability. The electrically conductive acetylene high polymer obtained by the process of this invention is a P-type semiconductor whose electrical conductivity can be freely controlled within the range of 10.sup.-9 to 10.sup.3 ohm.sup.-1.cm.sup.-1, and is useful as a material for photoelectric converter elements such as solar cells and photosensers, and as P-N hetero junction elements.

Process for producing electrically conductive high polymer of acetylene

Process for producing easily moldable composition of an acetylene high polymer by polymerizing acetylene using a catalyst system composed of (A) a transition metal compound containing at least one transition metal from Groups IVa, Va, VIa and VIII and (B) an organometallic compound containing at least one metal from Groups IIa, IIb, IIIb and IVb, the polymerization being carried out in a polymerization solvent containing the transition metal compound in a concentration of 0.0001 to 0.1 mole/liter to form a gel-like material consisting of an acetylene high polymer having a fibrous microcrystalline structure and the polymerization solvent.

Process for producing a porous acetylene high polymer by lyophilizing a gel-like composition composed of 1 part by weight of an acetylene high polymer having a fibril structure and 1 to 1,000 parts by weight of an organic solvent.

Process for preparing 2-oxazolidone and its derivatives by reacting react carbon dioxide with aziridine compound, preferably, in the presence of Lewis acid as a catalyst.

Process for preparing 2-oxazolidone and its derivatives

There is provided a process of preparing polyesters having carbonyl group and ether linkage in the principal chain thereof by the reaction of carbon dioxide with vinyl compounds or diene compounds (diolefins) having Alfrey-Price's value of less than -0.9. Said reaction may be carried out in the presence of catalysts as shown below: alkoxides, acetylacetone complexes and alkyl compounds of titanium, magnesium, cobalt, manganese, zinc, aluminium, tin and mercury.

Process of preparing polyesters having carbonyl group and ether linkage

There is provided a method of preparing transition metal complex catalysts combined with organic high polymers.

Growing community of inventors

Tokyo, Japan

Sakuji Ikeda