Dow Corning Toray Silicone Company Limited

Atsushi Sasaki

Yoshitsugu Morita

Ryuji Tachibana

Asao Harashima

Noriyasu Yokoyama

Kaoru Kunimatsu

There is disclosed a composite powder composition which has excellent flowability and water repellency and finds utility as a modifier for paints and organic resins, said composition comprising:

Composite cured silicone powder and method for the preparation thereof

The present invention provides curable resin compositions containing finely divided particles of a cured organosiloxane material with microparticles of silica bound to the surfaces of the particles. The particle size of the cured organosiloxane material and the particle size and properties of the silica are within specified limits.

Curable resin compositions containing silica-coated microparticles of a

Cured silicone powder and process for the preparation thereof

A method for producing powder mixtures capable of inducing an even more intimate, microhomogeneous intermixing in a heterogeneous powder composed of at least two types of powders. The method is effective even for the mixing of an aggregable powder and a nonaggregable powder. According to the method, a heterogeneous powder composed of at least two type of powders that have been preliminarily mixed by stirring is introduced into an inlet while a rotating axle is turning and is axially transported within a cylinder by a screw. As the heterogeneous powder passes between rotating disks and fixed disks, it is subjected to a highly efficient mixing by compression and shear forces due to a sliding-shear action exerted between depressions and elevations installed on the opposing surfaces of the rotating disks and fixed disks. The mixture passes in sequence through multiple stages of the rotating and fixed disks. A powder mixture, which has been microhomogeneously interdispersed, is discharged from the outlet.

Growing community of inventors

Chiba, Japan

Atsushi Sasaki