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Novel titanium catalyst for polyester and preparation method of novel titanium catalyst

A titanium-based catalyst and catalyst technology, applied in the direction of titanium organic compounds, etc., can solve the problem of unsatisfactory polyester color and luster, achieve good color and reduce side reactions

Active Publication Date: 2020-01-03
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a novel titanium-based catalyst for polyester and a preparation method to solve the problem that the color of polyester proposed in the above-mentioned background technology is still not ideal.

Method used

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  • Novel titanium catalyst for polyester and preparation method of novel titanium catalyst

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preparation example Construction

[0028] A kind of preparation method for the novel titanium series catalyst of polyester is characterized in that comprising the steps:

[0029] S1: Add at least two of the difunctionality, trifunctionality and tetrafunctionality compounds into the solvent according to a certain proportion, stir to dissolve all the solids, and obtain a mixed ligand solution;

[0030] S2: Mix and react titanate with the mixed ligand solution prepared in step S1, then add stabilizer and catalyst in turn, remove the replaced monofunctional alcohols and solvents by distillation, add appropriate amount of ethylene glycol to dilute to prepare a solution , which is mainly used in PET, PTT, PBT, PETG, PBS, PES, PEST, PBST, PEAT, PBAT, PCT, PCT, PCTG, PEIT, PEN, polyester elastomer, low melting point polyester, nylon elastomer, polyester In the polymerization process of polyesters such as carbonates and polyurethanes and polymers containing ester bonds, the dissolution temperature is -20-80 °C; the diss...

Embodiment 1

[0033] Citric acid (9.6g, 0.05mol, 0.5eq) and succinic acid (17.7g, 0.15mol, 1.5eq) were added to a round bottom flask, and ethanol (500g) was added to stir and dissolve under nitrogen protection to prepare a mixed ligand solution. Under nitrogen protection and stirring, tetrabutyl titanate (34.0 g, 0.1 mol, 1 eq) was added to the mixed ligand solution, and after half an hour of reaction, it was added to the boiling point of the solvent to react for 4 hours. The solvents ethylene glycol and butanol were removed by rotary evaporation, and then titanium catalyst CAT-1 diluted with ethylene glycol (120 g) to a titanium element content of 4% was added.

Embodiment 2

[0035] The feeding amount is: citric acid (9.6g, 0.05mol, 0.5eq), oxalic acid (13.5g, 0.15mol, 1.5eq), tetrabutyl titanate (34.0g, 0.1mol, 1eq), and the content of titanium element is 4 % titanium catalyst CAT-2.

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Abstract

The invention provides a novel titanium catalyst for polyester and a preparation method thereof. The novel titanium catalyst comprises the following components: titanate, complex ligands with different functionality degrees, a stabilizer, a solvent and a catalyst, wherein the mass percentage of titanium element is 0.1-20%, the molar ratio of difunctional ligands to trifunctional ligands to tetrafunctional ligands is (1-10):(0-5):(0-5), and the molar ratio of titanium atoms to the ligands in the solvent is (4:1)-(1:20). The titanium catalyst prepared by the method has excellent water resistance, and the catalyst can be dissolved in ethylene glycol and then can be conveniently added into a reaction system during industrial production. A polyester product polymerized by the titanium catalystprepared by the method has good color and luster, and is suitable for bottle-grade polyethylene terephthalate (PET) production with high requirements on color and luster.

Description

technical field [0001] The invention relates to a novel titanium series catalyst for polyester and a preparation method thereof, belonging to the field of chemical industry. Background technique [0002] Polyester materials are widely used in daily life, the main categories include: PET, PTT, PBT, PETG, PBS, PES, PEST, PBST, PEAT, PBAT, PCT, PCT, PCTG, PEIT, PEN, etc., the main application Directions such as polyester fiber, beverage bottles, packaging materials, engineering plastics, etc. It belongs to the largest volume of PET (Polyethylene terephthalate, polyethylene terephthalate). After industrial production in the 1850s, the production capacity has been increasing every year. In 2015, the production capacity of PET products in China was 39.66 million tons, and in 2017 In 2019, the production capacity of PET products in China increased to 41.14 million tons, of which the production capacity of PET for bottles reached about 8 million tons. In industrialized polyester...

Claims

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Application Information

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IPC IPC(8): C08G63/85C07F7/28
CPCC08G63/85C07F7/28
Inventor 林铭昌张剑敏姜伟宗建平胡广君朱振达
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD
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