Back to results
US 5,302,685 AGranted
Method for preparing organopolysiloxane powder
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsHiroshi Tsumura, Nobuhiko Kodana, Hidehiko Aonuma, Kenichi Isobe
Life of this patent
Estimating the term…
Abstract
Organopolysiloxane powder is prepared from an organopolysiloxane solution by admitting the organopolysiloxane solution into a planetary-screw mixer and agitating the solution at a sufficient temperature to allow a low-boiling liquid component to evaporate from the solution, thereby separating the low-boiling liquid component from the solution.
Claims9
A method for preparing organopolysiloxane powder from an organopolysiloxane solution, comprising the steps of:
- admitting an organopolysiloxane solution into a generally conical hollow tank having a vertical center axis and an inner wall, said tank being equipped with agitating means including a rotating shaft having at least one impeller positioned at an inclination in close proximity to the tank inner wall, said agitating means being effective for driving said shaft such that said shaft may rotate about its own axis and revolve about the center axis of the tank along the tank inner wall, and
- operating said agitating means for agitating the solution by rotation and revolution of said rotating shaft at a sufficient temperature to allow a low-boiling liquid component to evaporate from the solution, thereby evaporating and removing the low-boiling liquid component from the solution.
Dependencies are inferred from the claim text.