Patent ID: 8569540

Claim:
A mixture for the stabilization of diesters of dicarbonic acid, comprising: at least one protonic acid in an amount of 0.01 to 100,000 ppm, based on the diesters of dicarbonic acid, wherein the protonic acid is selected from the group of an inorganic acid and derivatives thereof and an organic carboxylic acid, and one or more diesters of dicarbonic acid of the general formula (I) where R 1 and R 2 independently of one another are straight-chain or branched C 1 -C 8 -alkyl, cycloalkyl, C 2 -C 8 -alkenyl, C 2 -C 8 -alkynyl or benzyl, each of which said R 1 and R 2 is optionally monosubstituted to polysubstituted, identically or differently by halogen; nitro; cyano; C 1 -C 6 -alkoxy; dialkylamino; or are phenyl which is optionally monosubstituted to polysubstituted, identically or differently by halogen; nitro; cyano; alkyl; haloalkyl; alkoxy; haloalkoxy; acyl; acyloxy; alkoxycarbonyl; carboxyl, wherein said organic carboxylic acid is selected from the group consisting of saturated and monounsaturated or polyunsaturated aliphatic monocarboxylic acids, saturated or polyunsaturated aliphatic dicarboxylic and polycarboxylic acids and derivatives thereof, hydroxamic acids, hydroxycarboxylic acids, amino acids, and keto acids.