Unlock instant, AI-driven research and patent intelligence for your innovation.

Titanium-based polyester catalyst as well as preparation method and application thereof

A technology of titanium-based polyester and catalyst, which is applied in the field of preparation of the catalyst, can solve the problems of increased polyester manufacturing cost and expensive germanium compound, and achieves increased thermal stability, excellent thermal stability and catalytic polycondensation performance, and equipment require simple effects

Active Publication Date: 2014-04-09
ZHEJIANG WANKAI NEW MATERIAL
View PDF10 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually these non-antimony-based catalysts include germanium compounds and titanium compounds. These catalysts have no heavy metals and their reactivity can even be better than antimony-based catalysts. However, germanium compounds are expensive due to their scarcity, which greatly increases the cost of polyester manufacturing. About germanium compounds The literature can refer to the Chinese invention patent application with application number 201310245106.3 "Preparation method of polyester material and polyester material, polyester chip and polyester film" (publication number CN103304796A); application number is 201310365617.9 Chinese invention patent application Publication of "Preparation Method of High-Strength Composite Fabric" (publication number CN103465587A), etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, 5.5mL of absolute ethanol, 11mL (0.0313mol) of tetrabutyl titanate, 38.8g of ethylene diethyl Alcohol and 7.512g (0.125mol) of nano-silica with an average particle size of 100nm; (2) heated to 190°C under nitrogen protection and vigorous stirring, and kept warm for 30 minutes to obtain a white product sample 1, 15.6g, filtered, and Wash with absolute ethanol and dry under vacuum at 50°C.

[0026] Add 800g of terephthalic acid, 415g of ethylene glycol and 0.1172g of sample 1 (10ppm Ti) into a 3L polyester reactor, and undergo esterification reaction at 250°C for 2.5h and polycondensation reaction at 270°C for 2h10min to obtain a polymer with an intrinsic viscosity of 0.6dl / g. The b value of the ester product was 8.5.

[0027] Add 800g of terephthalic acid, 415g of ethylene glycol and 0.32g of ethylene glycol antimony (200ppm Sb) into a 3L polyester reactor as a control sample. After 2.5h esterification reaction at 250°C and 2.5h polycondensation reaction at 2...

Embodiment 2

[0028] Example 2, 11 mL of absolute ethanol, 11 mL (0.0313 mol) of tetrabutyl titanate, 100 g of ethylene glycol and 13.146 g (0.219mol) of nano-silica with an average particle size of 40nm; (2) heated to 170°C under nitrogen protection and vigorous stirring, and kept the temperature for 2 hours to obtain the white product sample 2, 21.4g, filtered, and anhydrous Wash with ethanol and dry under vacuum at 50°C.

[0029] Add 800g of terephthalic acid, 415g of ethylene glycol and 0.1519g of sample 2 (10ppm Ti) into a 3L polyester reactor, and undergo an esterification reaction at 250°C for 2.5h and a polycondensation reaction at 270°C for 2h to obtain a polymer with an intrinsic viscosity of 0.6dl / g. The b value of the ester product was 7.9.

Embodiment 3

[0030] Example 3, 22 mL of absolute ethanol, 11 mL (0.0313 mol) of tetrabutyl titanate, 200 g of ethylene glycol and 18.78 g (0.313mol) of nano-silica with an average particle size of 10nm; (2) Heating to 120°C under nitrogen protection and vigorous stirring, and keeping it warm for 8 hours to obtain the white product sample 3, 25g, filtered, and washed with absolute ethanol Wash and dry under vacuum at 50°C.

[0031] Add 800g of terephthalic acid, 415g of ethylene glycol and 0.1865g of sample three (10ppm Ti) into a 3L polyester reactor, and undergo an esterification reaction at 250°C for 2.5h and a polycondensation reaction at 270°C for 2h to obtain a polymer with an intrinsic viscosity of 0.6dl / g. The b value of the ester product was 7.5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Intrinsic viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a titanium-based polyester catalyst. The titanium-based polyester catalyst comprises a carrier and a catalytic activity center loaded on the carrier and is characterized in that the carrier is nanosilicon dioxide, and the catalytic activity center is titanium ethylene glycolate. The invention further discloses a preparation method and application of the catalyst. Compared with the prior art, the titanium-based polyester catalyst has the advantages that polyester prepared by adopting the polyester catalyst has a good color value, and the yellowing problem of the polyester product synthesized by adopting a conventional titanium-based polyester catalyst is solved.

Description

technical field [0001] The invention relates to a polyester catalyst, and also relates to a preparation method and application of the catalyst. Background technique [0002] Polyester is currently one of the most widely used polymer materials, especially polyethylene terephthalate (PET), which is widely used in packaging, electronic appliances, medical and health care, construction, automobiles and other fields. At present, terephthalic acid and ethylene glycol are mostly used as raw materials in industrial production, and high-molecular-weight polyesters are obtained through esterification and polycondensation reactions. Since the polycondensation reaction is a reversible reaction with a low equilibrium constant, long-term high temperature is required for the reactants. High vacuum reaction is accompanied by thermal degradation reaction, so the polycondensation reaction needs a catalyst to promote the formation of high molecular weight polyester and reduce the occurrence of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G63/183C08G63/85
Inventor 王元前肖海军邱增明华云
Owner ZHEJIANG WANKAI NEW MATERIAL