Victor Company of Japan, Limited

Mitsubishi Chemical Corporation

Tokuyama Sekisui Industry Corporation, Limited

Toshio Akai

Toshiaki Hamaguchi

Kazuhira Namikawa

Mutsuaki Nakamura

Akio Kuroda

Toru Mori

Akio Hata

Noriki Fujii

Motohiro Munakata

Hitoshi Nimura

To provide a catalyst for production of a polyester, a process for producing a polyester using the catalyst and a titanium-containing polyethylene terephthalate having excellent characteristics. A catalyst for production of a polyester, characterized by comprising at least (1) a Group 4A compound (hereinafter referred to as compound (1)), (2) a compound of at least one element selected from the group consisting of magnesium, calcium and zinc (hereinafter referred to as compound (2)) and an oxygen-containing organic solvent. A process for producing a polyester using this catalyst. A titanium-containing polyethylene terephthalate, having characteristics represented by the following (A), (B) and (C):

Catalyst for production of polyester, process for producing polyester using it and titanium-containing polyethylene terephthalate

An information signal record medium of an electrostatic capacitance type in which a signal information is recorded as geometric variations is described. The medium is made of a conductive resin composition which comprises a vinyl chloride resin and 5 to 30 parts by weight of conductive particles based on 100 parts by weight of the vinyl chloride resin. The vinyl chloride resin is obtained by polymerizing at least one monomer for the vinyl chloride resin in which from 0.2 to 1 parts by weight of a lubricant per 100 parts by weight of the vinyl chloride resin is dissolved.

High density information record medium comprising a polymer material

High density information signal recording media of an electrostatic capacitance type, in which an information signal is recorded as geometric variations. The medium consists of a conductive resin composition which comprises a vinyl chloride resin, carbon black particles and a silicone oil lubricant. The carbon black particles are treated with a silicone oil to have the oil coated thereon.

High density information record medium using carbon black particles

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Yokohama, Japan

Toshio Akai