Biodegradable lubricating greases
AssigneeTotalenergies Onetech
InventorsLionel Bosco, Jeremy Levrier
Life of this patent
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Abstract
The present disclosure concerns a grease composition comprising relative to the total weight of the grease composition: a) from 70 to 95% by weight of base oil(s) each having a 28-day biodegradability of at least 60% as measured according to standard OECD 301B, b) from 1 to 20% by weight of thickener(s) chosen from among fatty acid metal salts, each thickener having a 28-day biodegradability of at least 60% as measured according to standard OECD 301B; c) from 0.5 to 10% by weight of calcium carbonate having a D50 particle size greater than or equal to 3 μm and a D90 particle size greater than or equal to 10 μm.
Claims17
A grease composition comprising, relative to the total weight of the grease composition:
- a) from 70 to 95% by weight of base oil(s) each having a 28-day biodegradability of at least 60% as measured according to standard OECD 301B;
- b) from 1 to 20% by weight of thickener(s) chosen from among fatty acid metal salts, each thickener having a 28-day biodegradability of at least 60% as measured according to standard OECD 301B;
- c) from 0.5 to 10% by weight of calcium carbonate having a D50 particle size greater than or equal to 3 μm and a D90 particle size greater than or equal to 10 μm.
A grease composition comprising, relative to the total weight of the grease composition:
- (a) from 70 to 95% by weight of base oil(s) each having a 28-day biodegradability of at least 60% as measured according to standard OECD 301B;
- (b) from 1 to 20% by weight of thickener(s) chosen from among fatty acid metal salts, each thickener having a 28-day biodegradability of at least 60% as measured according to standard OECD 301B;
- (c) from 0.5 to 10% by weight of calcium carbonate having a D50 particle size greater than or equal to 4 μm and a D90 particle size greater than or equal to 10 μm.
Dependencies are inferred from the claim text.