Abstract: A composition comprising: (1) a susceptor of magnetically coupled radio frequency energy comprising a non-magnetic particulate substrate, e.g., an electrically insulative material in particulate form, bearing a thin magnetic coating, e.g., a magnetic inorganic film, and (2) a matrix that is substantially non-reflective of radio frequency energy, e.g., silicone rubber, which matrix can be heated upon the composition's being subjected to magnetically coupled radio frequency energy. It has been discovered that thin magnetic coatings on non-magnetic particles provide energy transfer with induction heaters equal to or better than many commonly used solid susceptor particles. It has also been discovered that the temperature of the composition of this invention can be regulated so as not to exceed a predetermined temperature.
Type:
Grant
Filed:
May 26, 1995
Date of Patent:
June 25, 1996
Assignee:
Minnesota Mining and Manufacturing Co.
Inventors:
Charlotte M. Palmgren, Craig S. Chamberlain, Brian J. Fish
Abstract: A tris[4-(chlorophenoxy)phenyl] phosphate of the formula: ##STR1## wherein n has a value of 1 to 5. This compound is effective as a lubricity additive for high temperatures lubricants.
Type:
Grant
Filed:
December 9, 1991
Date of Patent:
March 23, 1993
Assignee:
The United States of America as represented by the Secretary of the Air Force
Inventors:
Lois J. Gschwender, Carl E. Synder, Jr.
Abstract: This invention relates to additives to lubricants with antiwear and extreme-pressure effect consisting of asymmetric dihydrocarbyl polysulphides containing a hydrocarbyl polysulphide group R-S.sub.x - in a vicinal position of a secondary or tertiary alcohol, and to lubricating compositions containing these additives. The additives are prepared by reaction of a basic salt of a hydrocarbyl (poly)sulphide either with a compound containing at least one epoxy group or with an alpha-hydroxylated organic thiosulphate.
Type:
Grant
Filed:
May 14, 1990
Date of Patent:
November 5, 1991
Assignee:
Elf France
Inventors:
Laurent Germanaud, Patrick Azorin, Lhopital Michel