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US 5,710,112 AGranted
Lubricant composition
AssigneeKyodo Yushi Co., Ltd.
InventorsKo Yaegashi, Yoshiaki Oikawa, Hiroshi Kamiyashiki, Hiroshi Kimura
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AssigneeKyodo Yushi Co., Ltd.
InventorsKo Yaegashi, Yoshiaki Oikawa, Hiroshi Kamiyashiki, Hiroshi Kimura
Estimating the term…
A lubricant composition comprising from 0.1 to 10% by weight of a phosphate glass, characterized in that said phosphate glass comprises from 45 to 75 mole % of P.sub.2 O.sub.5, from 10 to 35 mole % of M.sub.2 O (M represents alkaline metals) and from 0 to 45 mole % of B.sub.2 O.sub.3. Phosphate glasses are in the form of powder with white to ash-colored appearance, and do not cause dirt of working surroundings. Phosphate glasses are less expensive than solid lubricants which are conventionally used, and also excellent load carrying capacity can be attained by adding a small amount of phosphate glass to a lubricant composition. Accordingly, the lubricant composition of the present invention shows better load carrying capacity than a conventional lubricant composition.
A lubricant composition comprising a lubricating oil or lubricating grease, and from 0.1 to 10% by weight of a phosphate glass on the basis of the total weight of the lubricant composition, said phosphate glass comprising from 45 to 75 mole % of P.sub.2 O.sub.5, from 10 to 35 mole % of M.sub.2 O wherein M is an alkali metal, and from 0 to 45 mole % of B.sub.2 O.sub.3.
Dependencies are inferred from the claim text.