US 10,704,008 B2Granted

Heat-conductive silicone grease composition

AssigneeShin-Etsu Chemical Co., Ltd.

InventorNobuhiro Ichiroku

Life of this patent

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Abstract

A heat-conductive silicone grease composition comprising (A) an organopolysiloxane in an amount of 20 to 90 parts by mass, (B) a non-silicone-type organic compound in an amount of 80 to 10 parts by mass (wherein the total amount of the components (A) and (B) is 100 parts by mass) and (C) a heat-conductive inorganic filler having an average particle diameter of 0.5 to 100 μm in an amount of 200 to 2,000 parts by mass relative to 100 parts by mass of the total amount of the components (A) and (B), wherein the SP value of the non-silicone-type organic compound (B) is greater than that of the organopolysiloxane (A) (i.e., (B)>(A)), the value obtained by subtracting the SP value of the component (A) from the SP value of the component (B) is greater than 2, and the viscosity of the heat-conductive silicone grease composition is 50 to 1,000 Pa·s at 25° C.

Claims6

Dependent claims

A thermally conductive silicone grease composition comprising

(A) from 20 to 90 parts by weight of an organopolysiloxane,
(B) from 80 to 10 parts by weight of a non-silicone organic compound which is an aromatic liquid compound with a functionality of 3 or less that has on the molecule an organic group selected from among epoxy, phenolic hydroxyl and amino groups, the combined amount of components (A) and (B) being 100 parts by weight, and
(C) a thermally conductive inorganic filler having an average particle size of from 0.5 to 100 μm, in an amount of from 200 to 2,000 parts by weight per 100 parts by weight of components (A) and (B) combined,
wherein the non-silicone organic compound (B) and the organopolysiloxane (A) have respective solubility parameters (SP) such that
the SP of component (B) >the SP of component (A), and
the SP of component (B)−the SP of component (A) >2;
and
the thermally conductive silicone grease composition has a viscosity at 25° C. of from 50 to 1,000 Pa·s.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/562,492Filed 6 Apr 2016
Priority: JP 2015-09270930 Apr 2015
Published: US 2018/0094207 A15 Apr 2018
Granted: 7 Jul 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification38 codes

C10M 169/04
Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials,…:…
C08K 3/08
Elements: metals
C08K 3/28
Use of inorganic substances as compounding ingredients: nitrogen-containing compounds
C08L 63/00
Compositions of epoxy resins