Stabilized chlorinated solvents
AssigneeImperial Chemical Industries PLC
InventorsWilliam C. Mackrodt, Richard B. Jones, Neil Winterton
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Abstract
A solvent composition comprising 1,1,1-trichloroethane and a stabilizing amount of an epoxide of formula ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen, alkyl of 1 to 4 carbon atoms, phenyl or benzyl, R.sub.3 is hydrogen or alkyl of 1 to 4 carbon atoms, R.sub.4 is alkyl of 1 to 4 carbon atoms and n is 0 or 1. Preferably the or each alkyl group contains 1 or 2 carbon atoms; examples of useful epoxides are ethyl trans-2,3-epoxybutyrate, ethyl 3,4-epoxy-3-methylvalerate and ethyl beta-methyl-beta-phenylglycidate.
Claims12
A solvent composition comprising 1,1,1-trichloroethane and a stabilising amount ranging from 0.05% to 5% by weight based on the weight of 1,1,1-trichloroethane of a stabilising agent, characterized in that the stabilising agent is an epoxide of the formula. ##STR3## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and wherein R.sub.1 or R.sub.2 may also be a phenyl group or a benzyl group, n is 0 or 1, and R.sub.4 is an alkyl group having 1 to 2 carbon atoms.
A solvent composition as claimed in any one of the preceding claims which contains one or more additional stabilising agents for 1,1,1-trichloroethane.
Dependencies are inferred from the claim text.