To provide a food-grade, low friction lubricant additive for use with an oil-based lubricant.
The additive comprises boron nitride in combination with a dispersant and an oil carrier. Preferably, the oil carrier comprises one or more synthetic carriers; the boron nitride is a hexagonal boron nitride having a particle size in the range of about 0.1 to about 10 micrometers; the dispersant is alkylated polyvinylpyrrolidone modified with one or more of the group consisting of an α-olefin, eicosene, tricontanyl, hexadecane or a mixture thereof; the alkyl component of the polyvinylpyrrolidone has a linear moiety having 4-30 carbons; the dispersant comprises one or more synthetic esters; the synthetic carrier is selected from the group consisting of a polyalphaolefin, a polyalkylene glycol and mixtures thereof; and the lubricant additive comprises in the range of about 0.5 to about 50 weight percent boron nitride.
RAHIM MARUFUR
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toyoji Matsuda