Silicone grease composition
US6255257A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A silicone grease composition having high thermal conductivity, comprising (A) 50 to 95 weight % of a mixture of an aluminum nitride powder .alpha. having an average particle size of 0.5 to 5 .mu.m and an aluminum nitride powder .beta. having an average particle size of 6 to 20 .mu.m, wherein the aluminum nitride powders .alpha. and .beta. are mixed so that the .alpha./(.alpha.+.beta.) ratio by weight is from 0.1 to 0.9 and the average particle size after mixing is from 1 to 10 .mu.m, (B) 5 to 15 weight % of organopolysiloxanes having a viscosity of from 50 to 50,000 cs at 25.degree. C. and represented by formula R.sup.1.sub.a SiO.sub.(4-a)/2, wherein R.sup.1 represents at least one group selected from saturated or unsaturated univalent hydrocarbon groups containing 1 to 18 carbon atoms and 1.8.ltoreq.a.ltoreq.2.2, and (C) 0 to 35 weight % of at least one inorganic compound powder having an average particle size of 0.5 to 100 .mu.m selected from the group consisting of zinc oxide, alumina, boron nitride and silicon carbide powders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.