Title:
【発明の名称】化学変性シリカフィラー及びその製造方法、並びに、それを含むシリコーン組成物
Document Type and Number:
Japanese Patent JP2003507557
Kind Code:
A
Abstract:
This invention is a process for making modified silica filler comprising the steps of:(A) contacting an acidic aqueous suspension of precipitated or colloidal silica, optionally in the presence of a surfactant and/or a water-miscible solvent, with a combination of(a) a functionalizing coupling agent, and(b) an organometallic hydrophobing compound in a weight ratio of (a) to (b) of at least 0.001 to 1 to form an acidic aqueous suspension of chemically treated silica filler having a pH of 2.0 or less(B) treating the acidic aqueous suspension of the chemically treated filler with an acid-neutralizing agent to increase the pH of the suspension to a range of from greater than 2.0 to 10, and(C) recovering the chemically treated filler.This invention is also modified silica filler that has a pH of from about 5.0 to 10.0, where the silica filler is made by the method of this invention. This invention is also a curable silicone elastomer composition comprising a polyorganosiloxane, the modified silica filler produced by the method of this invention, and a means of curing the polyorganosiloxane into an elastomer.
Inventors:
Deborah F. Bergstrom
Clifford Sea Liese
Mark Di Fisher
Lisa M Boswell
James Earl Hahn
Timothy A. Oker
Clifford Sea Liese
Mark Di Fisher
Lisa M Boswell
James Earl Hahn
Timothy A. Oker
Application Number:
JP2001518799A
Publication Date:
February 25, 2003
Filing Date:
August 11, 2000
Export Citation:
Assignee:
Dow Corning Corporation
Ppee Industries Industries Ohio, Inc.
Ppee Industries Industries Ohio, Inc.
International Classes:
B60C1/00; C08K9/04; C08K9/06; C08L83/04; C09C1/28; C09C1/30; C09C3/00; C09C3/08; C09C3/12; (IPC1-7): C09C1/28; C08K9/06; C08L83/04; C09C3/08; C09C3/12
Attorney, Agent or Firm:
Masatake Shiga (7 outside)