Process for preparing a composition containing 2-ethylhexyl silicate

Patent metadata

Field	Value
Publication number	US-9994596-B2
Application number	US-201715415401-A
Country	US
Kind code	B2
Filing date	Jan 25, 2017
Priority date	Jan 26, 2016
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A composition containing 2-ethylhexyl silicate, is produced by heating a reaction mixture of ethyl silicate with an excess amount of 2-ethylhexanol in the presence of titanium tetrabutoxide as catalyst to a temperature below the boiling point of 2-ethylhexanol while mixing, allowing the reaction mixture to react and, after the reaction, removing ethanol and excess 2-ethylhexanol from the reaction mixture by distillation and obtaining the composition containing 2-ethylhexyl silicate.

First claim

The invention claimed is:

1. A process for preparing a composition containing, 2-ethylhexyl silicate, said process comprising:
heating a reaction mixture of ethyl silicate with an excess amount of 2-ethylhexanol in the presence of titanium tetrabutoxide as catalyst to a temperature below the boiling point of 2-ethylhexanol while mixing,
allowing the reaction mixture to react and,
after the reaction, removing ethanol and excess 2-ethylhexanol from the reaction mixture by distillation and obtaining the composition containing 2-ethylhexyl silicate.

2. The process according to claim 1 ,
wherein the weight ratio of ethyl silicate and 2-ethylhexanol is 1:1.1 to 1:10.

3. The process according to claim 1 ,
wherein the amount of titanium tetrabutoxide is 0.01% to 0.5% by weight, based on the amount of 2-ethylhexyl silicate used.

4. The process according to claim 1 ,
wherein the reaction is conducted at a temperature of 140 to 182° C.

5. The process according to claim 1 ,
wherein the reaction is conducted over a period of 12 to 60 hours.

6. The process according to claim 1 ,
wherein the transesterification reaction is conducted with a yield of ≥95%.

7. The process according to claim 1 ,
wherein said composition comprises a 2-ethylhexyl silicate content of ≥90% by weight.

Assignees

• Evonik Degussa Gmbh

Inventors

• Krafczyk Roland
• Standke Burkhard
• Koepfer Alexander
• Erhardt Sascha

Classifications

• C08G77/18

  to alkoxy or aryloxy groups · CPC title

• C07F7/04 Primary

  Esters of silicic acids · CPC title

• B01J31/12

  containing organo-metallic compounds or metal hydrides · CPC title

• C07F7/025 Primary

  without C-silicon linkages · CPC title

• C08G77/08 Primary

  characterised by the catalysts used · CPC title