Alkyl phenol-sulfur condensates as fuel and lubricating oil additives
US5236608A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1990 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Aug 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Additives for improving the low temperature flow properties and oxidative stability of hydrocarbon oils are disclosed, which comprise the condensation reaction product of alkylated phenol and sulfurizing agent, wherein: PA1 (a) the polymer composition has a number average molecular weight of at least about 3,000 and a molecular weight distribution of at least about 1.5; PA1 (b) in the alkylated phenol reactant the alkyl groups (i) are essentially linear; (ii) have between 6 and 50 carbon atoms; and (iii) have an average number of carbon atoms between about 12 and 26; and PA1 (c) not more than about 10 mole percent of the alkyl groups on the alkylated phenol have less than 12 carbon atoms and not more than about 10 mole percent of the alkyl groups on the alkylated phenol have more than 26 carbon atoms. The additives may also be produced in a branched backbone form in which monomer reactants are compolymerized with certain tri- or tetrafunctional comonomers. Blends of these additives with various hydrocarbon oils, and particularly various middle distillates and lubricating oil compositions, whose low temperature flow properties and oxidative stability are significantly improved there…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.