# US 2010/0305255 A1 · Mixtures of diisononyl esters of terephthalic acid, method for the production thereof and use thereof

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- Number: US 2010/0305255 A1
- Document ID: US20100305255A1
- Status: Published application
- Kind: A1
- Application number: 12/811,163
- Filed: 2008-12-03
- Published: 2010-12-02
- Earliest claimed: 2008-01-28
- Assignees: Evonik Oxeno GmbH
- Inventors: Michael Grass
- Web page: https://patentgrep.com/patent/US20100305255A1

## CPC

- C07C 69/82: Terephthalic acid esters
- C08K 5/12: of cyclic polycarboxylic acids
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The invention relates to mixtures of diisononyl esters of terephthalic acid, characterized in that the isomeric nonyl radicals bound in the ester mixture have an average degree of branching of 1.0 to 2.2. Said mixtures can advantageously be used as softeners or part of a softener composition in plastics or plastic components.

## Claims

### Claim 1

A mixture of diisononyl esters of terephthalic acid, comprising isomeric nonyl moieties, wherein an average degree of branching of the isomeric nonyl moieties in the mixture is from 1.0 to 2.2.

### Claim 2 (depends on 1)

A mixture according to claim 1, wherein the average degree of branching of the isomeric nonyl moieties in the mixture is from 1.1 to 2.1

### Claim 3 (depends on 1)

A mixture according to claim 1, wherein the average degree of branching of the isomeric nonyl moieties in the mixture is from 1.1 to 2.0.

### Claim 4 (depends on 1)

A mixture according to claim 1, wherein the average degree of branching of the isomeric nonyl moieties in the mixture is from 1.2 to 1.5.

### Claim 5 (depends on 1)

A mixture according to claim 1, wherein the isomeric nonyl moieties in the mixture comprise primary nonyl alcohols.

### Claim 6 (depends on 1)

A process for the production of at least one mixture of diisononyl esters of terephthalic acid according to claim 1, comprising producing isononyl esters with a mixture of isomeric nonanols whose average degree of branching is from 1.0 to 2.2.

### Claim 7 (depends on 6)

A process according to claim 6, wherein the producing comprises a transesterification of terephthalic esters comprising alkyl moieties which comprise fewer than 8 carbon atoms, with a mixture of isomeric primary nonanols.

### Claim 8 (depends on 6)

A process according to claim 6, wherein the producing comprises an esterification of terephthalic acid, with a mixture of primary nonanols.

### Claim 9 (depends on 6)

A process according to claim 6, wherein the producing comprises a complete or partial transesterification of a dinonyl terephthalate or of a mixture of isomeric dinonyl terephthalates, with a primary nonanol or a mixture of primary nonanols.

### Claim 10 (depends on 6)

A process according to claim 6, wherein the producing comprises: mixing isomerically pure nonyl terephthalates with one another, mixing an isomerically pure nonyl terephthalate with a mixture of nonyl terephthalates, or mixing two or more mixtures of dinonyl terephthalates.

### Claim 11 (depends on 6)

A process according to claim 6, wherein the mixture of isomeric nonanols comprises no more than from 0.0001 to 10 mol % of 3,5,5 trimethylhexanol.

### Claim 12 (depends on 11)

A process according to claim 11, wherein the mixture of isomeric nonanols comprises less than 5 mol % of 3,5,5 trimethylhexanol.

### Claim 13 (depends on 6)

A process according to claim 6, wherein a proportion of n nonanol in the of isomeric nonanols mixture is from 0.001 to 20 mol %.

### Claim 14 (depends on 1)

The process of manufacturing a plastic or a component of plastic, comprising adding the mixture of diisononyl esters of terephthalic acid according to claim 1 as plasticizer or part of a plasticizer composition in a plastic or in a component of plastic.

### Claim 15 (depends on 1)

A plastic or plastics composition, comprising the mixture of diisononyl esters of terephthalic acid according to claim 1.

### Claim 16 (depends on 1)

A PVC, PVB or PAMA composition, or a plastics product produced from said PVC, PVB or PAMA composition, comprising the mixture of diisononyl esters of terephthalic acid according to claim 1.