Stabilizer for organic solvents
A stabilizer composition comprising a) an amine and b) a compound selected from aliphatic, non-cyclic monomeric polyunsaturated hydrocarbons and terpenes is useful for stabilizing an organic solvent against degradation.
1. A stabilizer composition comprising
a) an amine comprising N,N-dimethyl benzylamine and
b) a compound selected from aliphatic, non-cyclic monomeric polyunsaturated hydrocarbons and terpenes.
2. The stabilizer composition of claim 1 wherein the pKa value of the amine a) is from 7 to 12.
3. The stabilizer composition of claim 1 wherein the compound b) is an aliphatic, non-cyclic monomeric polyunsaturated hydrocarbon.
4. The stabilizer composition of claim 3 wherein the compound b) is a hydrocarbon comprising from 5 to 20 carbon atoms and from 2 to 4 conjugated C═C carbon double bonds.
5. The stabilizer composition of claim 4 wherein the compound b) is 2,6-dimethyl-2,4,6-octatriene.
6. The stabilizer composition of claim 1 further comprising an additional stabilizing additive c) selected from the group consisting of acid acceptors, corrosion inhibitors, antioxididants and combinations thereof other than compounds a) and b).
7. The stabilizer composition of claim 6 wherein the stabilizing additive c) is an epoxide, an ether, an alkyl phenol or a combination thereof.
8. The stabilizer composition of claim 7 wherein the stabilizing additive c) is 2,6-di-tert.-butyl-p-cresol.
9. The solvent composition of claim 1 further comprising an organic solvent.
10. The solvent composition of claim 9 wherein the solvent is a hydrocarbon different from compound b), a halogenated hydrocarbon, a glycol ether, an ester or a ketone.
11. A composition comprising an organic solvent and a stabilizer consisting of N,N-dimethyl benzylamine.
12. The solvent composition of claim 11 wherein the organic solvent is a glycol ether or a hydrocarbon other than an aliphatic, non-cyclic monomeric polyunsaturated hydrocarbon.
13. A method comprising cleaning an article by contacting the article with the solvent composition of claim 9 .
14. A method of controlling the acid content of an organic solvent which method comprises combining the solvent with the stabilizer composition of claim 1 .
15. A method of protecting a cleaning apparatus or an article to be cleaned against corrosion while cleaning the article with an organic solvent, which method comprises combining with the organic solvent an effective amount of
a) an amine comprising N,N-dimethyl benzylamine and
b) a compound selected from aliphatic, non-cyclic monomeric polyunsaturated hydrocarbons and terpenes and
subjecting the article to a cleaning operation in the cleaning apparatus.
16. A method of protecting a cleaning apparatus or an article to be cleaned against corrosion while cleaning the article with the composition of claim 11 , which method comprises subjecting the article to a cleaning operation in the cleaning apparatus.