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Preparation method of polyester catalyst

A technology of polyester catalysts and compounds, which is applied in the field of preparation of titanium/silicon/tin composite catalysts, can solve problems such as good catalytic effect and good hue, and achieve good technical effects

Active Publication Date: 2012-10-03
KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no titanium-based catalyst that has been prepared, which has a good catalytic effect on esterification and polycondensation, and the hue of the obtained product is very good

Method used

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  • Preparation method of polyester catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 17g of tetrabutyl titanate, 1.2g of tetraethyl orthosilicate and 6.5g of tin tetrachloride in 86ml of absolute ethanol to obtain solution A, then dissolve 9g of deionized water with an appropriate amount of phosphoric acid and a pH of 1 in 86ml of Solution B was obtained in absolute ethanol. Under the condition of stirring evenly, add solution B to solution A, add dropwise for half an hour, temperature is 15 ℃, produce white precipitate, then stir the mixture for 1 hour, centrifuge, wash the precipitate with water 3 times, finally in Dry at 70°C for 24 hours to obtain catalyst Cat-1.

Embodiment 2

[0025] Dissolve 27.2g of tetrabutyl titanate, 1.5g of tetraethyl orthosilicate and 15.6g of tin tetrachloride in 134ml of absolute ethanol to obtain solution A, and then dissolve 20.9g of deionized water with an appropriate amount of hydrochloric acid and a pH of 4 Solution B was obtained in 134ml of absolute ethanol. Under the condition of stirring evenly, add solution B to solution A, the dropwise addition time is half an hour, the temperature is 20 ℃, a white precipitate is produced, then the mixture is stirred for 45 minutes, centrifuged, the precipitate is washed 3 times, and finally in Dry at 70°C for 24 hours to obtain catalyst Cat-2.

Embodiment 3

[0027] Dissolve 22.7g of tetraisopropyl titanate, 2.2g of tetraethyl orthosilicate and 20.8g of tin tetrachloride in 139ml of absolute ethanol to obtain solution A, then add appropriate amount of ammonia water, 18.1g of deionized Water was dissolved in 139ml of absolute ethanol to obtain solution B. Under the condition of stirring evenly, add solution B to solution A, add dropwise time for half an hour, temperature is 30 ℃, produce white precipitate, then stir the mixture for 1 hour, centrifuge, wash the precipitate with water 3 times, finally in Dry at 70°C for 24 hours to obtain catalyst Cat-3.

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Abstract

The invention relates to a preparation method of a polyester catalyst. The preparation method comprises the following steps: (1) dissolving a titanium-containing compound, a silicon-containing compound and a tin-containing compound into an organic solvent in sequence; and (2) adding acidic or basic aqueous solution into a mixture obtained in the step (1) to hydrolyze, collecting a sediment, centrifuging, washing and drying to obtain the catalyst provided by the invention, that is to say, a coprecipitate of TiO2 / SiO2 / SnO2. The catalyst has not only an effect on condensation polymerization of polyester, but a remarkable catalytic action on esterification reaction, and the obtained polyester chip is better in hue.

Description

technical field [0001] The invention relates to a preparation method of a polyester catalyst, in particular to a preparation method of a titanium / silicon / tin composite catalyst which can be used as a polyester and copolyester esterification and polycondensation reaction. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of dibasic alcohols and dibasic acids. It is a class of engineering plastics with excellent performance and a wide range of uses. It has important uses in the fields of film, bottle packaging, and sheet materials. [0003] The research on polyester catalysts has never stopped since the advent of polyester. At present, there are mainly three series of catalysts used in industrial production and research: antimony, germanium and titanium. Among them, the most commonly used are antimony-based catalysts (including Sb 2 o 3 , SbAc 3 and ethylene glycol antimony, etc.). 90% of polyesters in the world today are pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/87C08G63/85
CPCC08G63/85C08G63/87B01J37/031B01J37/033B01J21/063B01J21/08B01J23/14
Inventor 曾作祥王鲁杰李哲龙朱万育韩涛沈艳
Owner KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD