| (19) |
 |
|
(11) |
EP 0 590 959 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.08.1994 Bulletin 1994/32 |
| (43) |
Date of publication A2: |
|
06.04.1994 Bulletin 1994/14 |
| (22) |
Date of filing: 29.09.1993 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
| (30) |
Priority: |
30.09.1992 US 954936
|
| (71) |
Applicant: CASTROL LIMITED |
|
Swindon
Wiltshire SN3 1RE (GB) |
|
| (72) |
Inventors: |
|
- Lum, Andrew F.
La Mirada,
California 90638 (US)
- Uribe, Juan M.
Valinda,
California 91744 (US)
- Hogan, John M.
Long Beach, California 90804 (US)
- Persinger, Richard A.
Winfield,
Illinois 60190 (US)
- Miller, James F.
Rowland Heights,
California 91748 (US)
- Navaratnam, Ramesh A.
Plainfield,
Illinois 60544 (US)
|
| (74) |
Representative: Baldock, Sharon Claire et al |
|
Boult, Wade & Tennant
27 Furnival Street
London EC4A 1PQ
London EC4A 1PQ (GB) |
|
| |
|
| (54) |
Carrier-free metalworking lubricant and method of making and using same |
(57) A carrier-free pulverulent metalworking lubricant composition. In one form, the composition
contains from 2 to 30% by weight sulfur and at least one component having adhesive
properties at forging temperatures, the composition being formed by a method comprising
the steps of: (a) forming a dry mixture of said particulate lubricant components,
and (b) agglomerating said admixture to form agglomerated particles. The application
of the composition as a metal working lubricant significantly reduces smoke and oily
waste generation in hot forging operations by eliminating the use of oils or volatile
organic compounds as carriers, while providing acceptable performance, cleanability
and sprayability.