Tetraisopentyl esters of butanetetracarboxylic acid, production thereof and use thereof as plasticizers
AssigneeEvonik Operations GmbH
InventorsJohannes KRAFT, Imke Schulz, Michael Grass
Life of this patent
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Abstract
Tetraisopentyl esters of butanetetracarboxylic acid are useful as plasticizers or as part of a plasticizer composition for polymers. A process for the production thereof, plasticizer compositions containing the tetraisopentyl esters of butanetetracarboxylic acid, and plastics compositions containing the tetraisopentyl esters of butanetetracarboxylic acid are also provided.
Claims17
The mixture according to claim 1, wherein 50 to 60 mol % of the isopentyl radicals in the mixture are 2-methylbutyl radicals.
The mixture according to claim 1, wherein 40 to 55 mol % of the isopentyl radicals in the mixture are n-pentyl radicals, 3-methylbutyl radicals, or a mixture of n-pentyl radicals and 3-methylbutyl radicals.
A process for producing the mixture of tetraisopentyl esters of 1,2,3,4-butanetetracarboxylic acid according to claim 1, the process comprising:
- producing the tetraisopentyl esters of 1,2,3,4-butanetetracarboxylic acid either
- by esterification of the 1,2,3,4-butanetetracarboxylic acid with an isopentanol mixture, or
- by transesterification of a tetramethyl ester of the 1,2,3,4-butanetetracarboxylic acid with an isopentanol mixture.
A method, comprising:
- mixing the mixture of tetraisopentyl esters of 1,2,3,4-butanetetracarboxylic acid according to claim 1, as a plasticizer, with at least one polymer.
A plasticizer composition, containing:
- the mixture of tetraisopentyl esters of 1,2,3,4-butanetetracarboxylic acid according to claim 1, and
- at least one further plasticizing compound.
A plastics composition, containing:
- the mixture of tetraisopentyl esters of 1,2,3,4-butanetetracarboxylic acid according to claim 1, and
- one or more polymers.
Dependencies are inferred from the claim text.