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:
Jun. 09, 2015
Filed:
Mar. 30, 2010
Delphine Davio, Le Roeulx, BE;
Robert Alan Ekeland, Greer, SC (US);
Andreas Stammer, Pont-a-Celles, BE;
Giada Tonet, Chap.-lez-Herlaimont, BE;
Delphine Davio, Le Roeulx, BE;
Robert Alan Ekeland, Greer, SC (US);
Andreas Stammer, Pont-a-Celles, BE;
Giada Tonet, Chap.-lez-Herlaimont, BE;
Dow Corning Corporation, Midland, MI (US);
Abstract
The invention relates to branched organopolysiloxanes and to their preparation and use. A branched organopolysiloxane is prepared by the reaction of an alkoxysilane with a substantially linear organopolysiloxane containing at least one hydroxyl or hydrolysable group bonded to silicon, in the presence of a phosphazene catalyst. The branched organopolysiloxanes obtained can be suitable for use in a moisture curable sealant composition capable of curing to a high modulus seal, with less tendency to gel than when using other siloxane polycondensation catalysts. Phosphazene catalysts also have the advantage that the content of undesired low molecular weight cyclic silicones in the polymerization product is low.