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:
Jan. 09, 2018
Filed:
Jun. 11, 2013
Wacker Chemie Ag, Munich, DE;
Florian Hoffmann, Munich, DE;
Juergen Stohrer, Pullach, DE;
Wacker Chemie AG, Munich, DE;
Abstract
The invention provides mixtures, liquid at 25° C., of methylpolysiloxanes comprising at least two methylpolysiloxanes selected from linear compounds of the general formula I MeSiO-(MeSiO)x-SiMe(I), and cyclic compounds of the general formula II (MeSiO)y (II), wherein the mixture comprises at least one linear methylpolysiloxane of the general formula I and at least one cyclic methylpolysiloxane of the general formula II, Me means methyl radical, x has values greater than or equal to zero and the arithmetic mean of x, weighted by the molar proportions, over all linear methylpolysiloxanes is between 3 and 20, y has values greater than or equal to 3 and the arithmetic mean of y, weighted by the molar proportions, over all cyclic methylpolysiloxanes is between 3 and 6, the numerical ratio of the MeSi— chain ends groups in the compounds of the general formula I to the sum of the MeSiO— units in the compounds of the general formulae I and II is at least 1:2 and at most 1:10, and further definitions are described in claim, and the use of the mixtures as heat carrier fluids.