Terpinene-maleic anhydride adduct derivatives as corrosion inhibitors
US5066461A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Jul 30, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/939
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 when taken independently, each represent the monovalent group of formula: ##STR2## wherein Y is a monovalent group selected from hydroxyl and a group of the formula: ##STR3## wherein n is a whole number integer of 0 to 6; X is selected from the group consisting of hydroxyl and amino when n is from 1 to 6; and when n is 0, X is selected from monovalent groups of the formula: EQU --0--alkylene--NR.sup.3 R.sup.4 (IV) wherein n has the meaning previously ascribed to it; R.sup.3 is selected from the group consisting of hydrogen and R.sup.4 ; and R.sup.4 represents a monovalent group of the formula EQU --Alkylene--OH; (V) provided that R.sup.1 and R.sup.2 are not both a carboxyl group; and R.sup.1 and R.sup.2 when taken together represent the divalent moiety of formula: ##STR4## wherein A represents one of oxygen and ##STR5## wherein n has the meaning previously ascribed to it; and applied to oxidation prone metals to inhibit corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.