The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Dec. 19, 2006
Kamel Ramdani, Tupin Et. Semons, FR;
Hélène Bossy, Luzinary, FR;
Sébastien Lomel, Saint Just Chaleyssin, FR;
Nicolas Durand, Lyons, FR;
Kamel Ramdani, Tupin Et. Semons, FR;
Hélène Bossy, Luzinary, FR;
Sébastien Lomel, Saint Just Chaleyssin, FR;
Nicolas Durand, Lyons, FR;
Bluestar Silicones France, Lyons, FR;
Abstract
The invention relates to, and the general field of the invention is that of, the synthesis of silicone resins, more particularly the synthesis of silicone resins of type MQ. The process relates to the preparation of MQ silicone resins and permits better control of the operating conditions in the step of the polymerization of a sodium silicate (B) in aqueous medium in the presence of an acid (C) to form a silica hydrosol (polysilicic acid). In the course of the polycondensation step the reactants, a sodium silicate and an acid, are mixed, preferably in continuous fashion, dynamically to form a mixture (), by means of at least one intensive mixing tool (M) producing a power ε per unit volume of more than 10 kW/m.