Daicel Chemical Industries, Ltd.

Tohoku University

Michio Nakanishi

Takuya Miho

Shoji Watanabe

Naoki Nakashima

Masayoshi Kubo

Mamoru Kimura

Makoto Hosotani

Yoshima Araki

Hidetoshi Oikawa

Kenkichi Murakami

Michio Kawakami

A composition for producing a metallic sintered body consisting essentially of a mixture of a powdered metal having an average particle size of not more than 50 microns with a lactone resin having a relative viscosity value in the range of from 1.15 to 3.20 is disclosed. The composition has excellent properties such as mechanical strength of a green body thereof, and only a short time being necessary for removal or elimination of binder in comparison with conventional sintering compositions. Furthermore, the binder in the present composition is substantially composed of a single component; accordingly, manufacturing process control can be simplified by use of the lactone resin. Furthermore, a method for producing a metallic sintered body using such composition is also disclosed.

Method for producing a metallic sintered body

A composition for producing a metallic sintered body consisting essentially of a mixture of a powered metal having an average particle size of not more than 50 microns with a lactone resin having a relative viscosity value in the range of from 1.15 to 3.20 is disclosed. The composition has excellent properties such as mechanical strength of a green body thereof, and only a short time being necessary for removal or elimination of binder in comparison with conventional sintering compositions. Furthermore, the binder in the present composition is substantially composed of a single component; accordingly, manufacturing process control can be simplified by use of the lactone resin. Furthermore, a method for producing a metallic sintered body using such composition is also disclosed.

Composition and method for producing a metallic sintered body

Polyester-polysiloxane block copolymers for dental uses are disclosed as low modulus thermoplastic elastomers. The copolymers comprise polycaprolactone residues and poly(dimethylsiloxane) .alpha.,.omega.-diol residues which are linked by ether bonds. The compounds exhibit the property of plasticity by heating and the property of original rubber elasticity by cooling again to room temperature.

Low modulus thermoplastic elastomeric polyester-polysiloxane block

A synthetic resin composition comprises (A) 100 parts by weight of polycaprolactone and (B-1) 10 to 70 parts by weight of a thermoplastic resin and 1 to 30 parts by weight of a tackifier, or (B-2) 10 to 70 parts by weight of a chlorinated polyolefin.

Polycaprolactone composition

New thermoplastic polyester resins having a low melting point which are useful as a molding material, especially as an orthopedic cast material; said resin having the formula (I):

Thermoplastic polyester resin, production of same, and orthopedic cast

In a process for producing a lactone polyester which comprises ring-opening polymerization of a lactone in the presence of a metal containing organic compound as a catalyst, the improvement wherein said compound is an alcoholate, chelate or organic acid salt of vanadium or molybdenum.

Growing community of inventors

Niiza, Japan

Michio Nakanishi