Bifunctional cold resistance additive for fuels, and fuel composition
US6071318A · kind A · utility
11Cited by
4References
10Claims
0Family size
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Key dates
| Filing date | Feb 20, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Feb 20, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/1973
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A bifunctional anti-settling and dispersant additive for middle distillates from 150-450.degree. C. petroleum fractions, characterized in that consists of at least one modified copolymer with a weight-average molecular weight of 500-5000 prepared as follows: in a first step, a first carboxylic acid is copolymerized with an alkylated ester of a second carboxylic acid which is the same as or different from the first, and in a second step, the carboxylic groupings of the resulting copolymer re amidified at a temperature of 100-200.degree. C. ##STR1## wherein n and m are from 1 to 8, and R and R' are preferably alkyl groupings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.