Sulfurized metal phenates
USRE29661E · kind E · reissue
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13Claims
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Key dates
| Filing date | Jul 5, 1977 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Jul 5, 1997 |
Classification
- Technology area (CPC —)General
Abstract
A novel multifunctional lube oil additive is provided and comprising the reaction product of an alkyl phenol having from 8 to 35 carbons in the alkyl group, sulfur and an alkaline earth metal oxide or hydroxide. The reaction is performed in a two step process in the presence of a mutual solvent whereby the sulfurized metal phenate produced has a sulfur to metal atom ratio between about 1 and 2 .Iadd.and an alkalinity value of 40 to 200 mg. KOH/gram..Iaddend.
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