Preparation method of energy-saving anti-ultraviolet polytrimethylene terephthalate

A technology of propylene phthalate and purified terephthalic acid, which is applied in the field of preparation of energy-saving and UV-resistant polytrimethylene terephthalate, can solve the problems of precipitation and poor catalyst dispersion ability, and achieves lower polymerization temperature and better resistance to UV performance, the effect of reducing energy usage

Inactive Publication Date: 2020-05-15
ZHEJIANG WANKAI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst in this technical scheme has poor dispersion ability and is easy to precipitate in the polymer

Method used

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  • Preparation method of energy-saving anti-ultraviolet polytrimethylene terephthalate
  • Preparation method of energy-saving anti-ultraviolet polytrimethylene terephthalate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first stage of esterification reaction: Add 432g of purified terephthalic acid, 360g of propylene glycol, 0.26g of titanium-based catalyst loaded with metal ions, 0.26g of stabilizer, 0.23g of polyol and 2g of nano-titanium nitride slurry into the polymerization kettle reaction. Replace the air in the polymerization tank with inert gas, control the pressure in the polymerization tank at 0.3MPa, the speed of the agitator at 80r / min, control the temperature in the polymerization tank at 180°C, calculate the esterification efficiency by the water yield, when the conversion of terephthalic acid When the rate reaches 95%, the esterification reaction ends;

[0033]The second stage polycondensation reaction: vacuumize the polymerization kettle, control the pressure inside the polymerization kettle at 1.3KPa, raise the temperature inside the polymerization kettle to 230°C, control the rotation speed of the agitator at 120r / min, and react for 20min; The temperature was rais...

Embodiment 2

[0036] The first stage of esterification reaction: Add 432g of purified terephthalic acid, 300g of propylene glycol, 0.35g of titanium-based catalyst loaded with metal ions, 0.3g of stabilizer, 0.3g of polyol and 2.5g of nano-titanium oxide slurry into the polymerization kettle reaction. Replace the air in the polymerization tank with inert gas, control the pressure in the polymerization tank at 0.2MPa, the speed of the agitator at 80r / min, control the temperature in the polymerization tank at 210°C, calculate the esterification efficiency by the water yield, when the conversion of terephthalic acid When the rate reaches 98%, the esterification reaction ends;

[0037] The second stage polycondensation reaction: evacuate the polymerization kettle, control the pressure inside the polymerization kettle at 1.21KPa, raise the temperature inside the polymerization kettle to 240°C, control the rotation speed of the stirrer at 120r / min, and react for 25min; Raise to 260°C, control th...

Embodiment 3

[0040] The first stage of esterification reaction: Add 400g of purified terephthalic acid, 340g of propylene glycol, 0.2g of titanium-based catalyst loaded with metal ions, 0.2g of stabilizer, 0.25g of polyol and 1.5g of nano-titanium oxide slurry into the polymerization kettle reaction. Replace the air in the polymerization tank with inert gas, control the pressure in the polymerization tank at 0.1MPa, the speed of the agitator at 70r / min, control the temperature in the polymerization tank at 200°C, calculate the esterification efficiency by the water yield, when the conversion of terephthalic acid When the rate reaches 93%, the esterification reaction ends;

[0041] The second stage of polycondensation reaction: vacuumize the polymerization tank, control the pressure in the polymerization tank to 1.2KPa, raise the temperature in the polymerization tank to 230°C, control the rotation speed of the agitator at 120r / min, and react for 10-30min; then polymerize The temperature i...

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Abstract

The invention discloses a preparation method of energy-saving anti-ultraviolet polytrimethylene terephthalate. The preparation method is characterized by comprising the following steps: a first-stageesterification reaction: adding purified terephthalic acid, propylene glycol, an auxiliary agent containing a stabilizer and a titanium catalyst loaded with metal ions, and a titanium compound selected from at least one of nano titanium nitride, nano titanium oxide and nano zinc titanate into a polymerization kettle; replacing air in the polymerization kettle with inert gas, controlling the pressure in the polymerization kettle to be 0.1-0.4 MPa, controlling the rotating speed of the stirrer to be 50-120 r/min, controlling the temperature in the polymerization kettle to be 120-230 DEG C, calculating the esterification efficiency according to the water yield, and ending the esterification reaction when the conversion rate of terephthalic acid reaches 90-100%. The polytrimethylene terephthalate prepared by the method has excellent energy-saving and anti-ultraviolet properties, and also has the advantages of being not easy to degrade and good in color and luster.

Description

technical field [0001] The invention relates to the modification of polytrimethylene terephthalate, in particular to a preparation method of energy-saving and anti-ultraviolet polytrimethylene terephthalate. Background technique [0002] Propylene terephthalate (PTT) is a kind of fiber with excellent performance obtained by esterification, transesterification and polycondensation of purified terephthalic acid or dimethyl terephthalate and propylene glycol. The softness of nylon, the bulkiness of acrylic fiber and the stain resistance of polyester, together with its inherent elasticity, moderate glass transition temperature and good processing performance, is a new type of thermoplastic polyester material with great development prospects. Widely used in the field of textile and engineering plastics. Because of its excellent resilience, dyeability, stain resistance and antistatic properties, it is known as "the most competitive fiber in the 21st century" and "the most popular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/85
CPCC08G63/183C08G63/85
Inventor 蒲新明肖海军沈志刚华云郑兵章延举刘青松
Owner ZHEJIANG WANKAI NEW MATERIAL
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