Toyo Boseki Kabushiki Kaisha

Masakatsu Ohguchi

Tatsuhiko Shizuki

Fumikazu Yoshida

Kaoru Ban

Shinya Higashiura

Toshiyuki Shimizu

Yoshio Araki

Fuyuhiko Kubota

Kiyoshi Hotta

Minoru Wada

Hideki Tanaka

Kikuji Igeta

Ryoji Nakamura

A method for producing polybenzazole, which comprises reacting a PBZ monomer salt with an AA-PBZ monomer or a BB-PBZ monomer in a non-oxidizing solvent having a dehydrating action to give an oligomer, and adding the AA-PBZ monomer or BB-PBZ monomer, which has not been subjected to the above reaction, to allow reaction with the oligomer, whereby to give a polymer having a desired polymerization degree. According to this method, the polymerization degree of the polymer to be obtained finally and of the polymer during production process can be easily controlled.

Method for production of polybenzazole

The grafting reaction product of the present invention includes a main chain having a polymer selected from one of a polyester and a polyester polyurethane consisting mainly of the polyester, the polyester containing 60 mole % or more of an aromatic dicarboxylic acid for the amount of the total carboxylic acids. The grafting reaction product further includes a plurality of side chains which are polymers of radical polymerizable monomers, said radical polymerizable monomers having at least 30% by weight of the combination of at least one electron accepting monomers (A) having an e value of 0.9 or more and at least one electron donative monomers (B) having an e value of -0.6 or less for the amount of the total radical polymerizable monomers, and at least 10% by weight of an aromatic radical polymerizable monomer for the amount of the total radical polymerizable monomers. According to the present invention, the plurality of side chains are grafted into the main chain to form the grafting reaction product.

Grafting reaction product and method for producing the same

An antistatic fiber obtained by melt spinning of a fiber-forming thermoplastic polymer containing at least one of polyoxyalkylene glycol and its derivatives in an amount of not less than 0.5% by weight, characterized in that said fiber has a half life time of electric charge leakage of not more than 150 seconds before and after treatment with a weight decreasing agent and, when treated with a weight decreasing agent, provides a number of streaks arranged in parallel in the lengthwise direction at the surface.

Process for preparing antistatic fiber

A polyester synthetic fiber containing rigid microgrooves, in which there is a ridge-like portion between adjacent microgrooves, said microgrooves being substantially continuous in the axial direction of the fiber, and which microgrooves are arranged nearly regularly on the surface of the polyester fibers said microgrooves and ridges having microcraters distributed upon the surfaces thereof. The polyester fibers have a dry feel and a silk-like hand and possess excellent deep-color dyability.

Polyester fiber and production thereof

Antistatic fiber containing polyoxyalkylene glycol

A shaped article of hydrophobic synthetic polymer is graft polymerized uniformly and economically in a high yield, and consequently is endowed with various advantageous properties, when it is treated in an aqueous emulsified dispersion having dispersed in water an hydrophobic radical polymerization initiator, an organic solvent which is liquid at normal room temperature, naphthalene and an unsaturated monomer containing in the molecular unit thereof at least one double bond capable of radical polymerization.

Method for graft polymerization of shaped article of hydrophobic

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Ohtsu, Japan

Masakatsu Ohguchi