Lubricant compositions

Abstract

A lubricant composition for use alone or in a lubricating base, comprising a finely divided carbonate of Group IIA metal and a halogenated organic lubricant.

What we claim is: 
     
       1. A lubricant composition for use .[.alone or.]. in a lubricating base, comprising a finely divided carbonate of a Group IIA metal and a halogenated organic lubricant .Iadd., the carbonate being present in a major proportion with respect to the halogenated organic lubricant.Iaddend.. 
     
     
       2. A composition according to claim 1, wherein the carbonate is calcium carbonate. 
     
     
       3. A composition according to claim 1, further comprising a finely divided inorganic sulphate salt. 
     
     
       4. A composition according to claim 3, wherein the sulphate is a sulphate of a Group IA or IIA metal. 
     
     
       5. A composition according to claim 4, wherein the sulphate is calcium sulphate hemihydrate. 
     
     
       6. A composition according to claim 1, wherein the halogenated lubricant is a chlorinated paraffin. 
     
     
       7. A composition according to claim 1, further comprising molybdenum disulphide. 
     
     
       8. A composition according to claim 1, wherein the carbonate is present in an amount 5 to 15 times by weight of the halogenated lubricant. 
     
     
       9. A composition according to claim 8, comprising a finely divided inorganic sulphate salt in an amount by weight comparable to that of the halogenated lubricant. .Iadd. 10. A lubricant comprising a lubricant base and a lubricant composition comprising a finely divided carbonate of a Group IIA metal and a halogenated organic lubricant, the carbonate being present in a major proportion with respect to the halogenated lubricant. .Iaddend. .Iadd. 11. A composition according to claim 10, wherein the carbonate comprises calcium carbonate. .Iaddend..Iadd. 12. A composition according to claim 10 further comprising a finely divided inorganic sulphate salt. .Iaddend..Iadd. 13. A composition according to claim 12, wherein the sulphate comprises a sulphate of a Group IA or IIA metal. .Iaddend..Iadd. 14. A composition according to claim 13, wherein the sulphate comprises calcium sulphate hemihydrate. .Iaddend..Iadd. 15. A composition according to claim 10, wherein the halogenated lubricant comprises a chlorinated paraffin. .Iaddend..Iadd. 16. A composition according to claim 10, further comprising molybdenum disulphide. .Iaddend..Iadd. 17. A composition according to claim 10, wherein the carbonate is present in an amount 5 to 15 times by weight of the halogenated lubricant. .Iaddend..Iadd. 18. A composition according to claim 17, further comprising a finely divided inorganic sulphate salt in an amount by weight comparable to that of the halogenated lubricant. .Iaddend..Iadd. 19. A composition according to claim 10 wherein said lubricant composition is present in said lubricant in an amount of from 3 to 5% by weight. .Iaddend.