Oxazolines of 2-(alkylthio)succinic acids as an additive for drilling muds
US4455429A · kind A · utility
2Cited by
4References
4Claims
0Family size
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Key dates
| Filing date | Sep 21, 1983 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Sep 21, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A bis-oxazoline of the formula: ##STR1## wherein R represents an alkyl group of 6 to 50 carbons and X is selected from the group containing of an alkyl or hydroxyalkyl group and at least one of the X substituents being a hydroxy alkyl group of the structure --(CH.sub.2).sub.n OH where n is 1 to 3, which is useful in improving the lubricity of aqueous drilling muds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.