Environmentally friendly solid lubricant sticks
OwnerMichael J. Mitrovichinventor
Life of this patent
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Abstract
A solid lubricant and composition useful for lubricating the flanges of locomotive wheels, railcar wheels, rail tracks and in applications where it is desirable to reduce friction when metal contacts metal. The solid lubricant having from about 25% to about 70% by volume of a biopolymer polymeric carrier, about 5% to 75% percent by volume of organic and inorganic extreme pressure additives, about 0% to 20% by volume synthetic extreme pressure anti-wear liquid oil, and about 0% to 1% by volume optical brightener.
Claims19
A solid lubricant composition comprising at least one polylactic acid-based polymer and at least one lubricant powder, said composition further comprising:
- (a) from about 5% to about 55% by volume of at least one non-polylactic acid-based polymeric carrier;
- (b) about 10% to about 15% by volume of said polylactic acid-based polymer;
- (c) from about 5% to about 75% by volume of said at least one lubricant powder;
- (d) from 0% to about 20% by volume of at least one synthetic extreme pressure anti-wear liquid oil;
- and
- (e) from 0% to about 1% by volume of at least one optical brightener.
A solid lubricant composition comprising:
- (a) from about 20% to about 70% by volume of polyactide;
- (b) from about 5% to about 75% by volume of at least one lubricant powder;
- (c) from 0% to about 20% by volume of at least one synthetic extreme pressure anti-wear liquid oil;
- and
- (d) from more than 0% to about 1% by volume of at least one optical brightener.
A process for lubricating a railcar wheel flange comprising the step of pressing a solid lubricant composition against said railcar wheel flange, said solid lubricant composition comprising:
- (a) from about 20% to about 70% by volume of polyactide;
- (b) from about 5% to about 75% by volume of at least one lubricant powder;
- (c) from 0% to about 20% by volume of at least one synthetic extreme pressure anti-wear liquid oil;
- and
- (d) from 0% to about 1% by volume of at least one optical brightener.
Dependencies are inferred from the claim text.