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Method for preparing nano-calcium carbonate/polyester composite material

A polyester composite material, nano-calcium carbonate technology, applied in the field of preparation of nano-calcium carbonate polyester composite materials, can solve problems such as difficult dispersion, easy agglomeration of nano-calcium carbonate, and inability to effectively strengthen and toughen polyester materials

Inactive Publication Date: 2009-04-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of preparation nano calcium carbonate The new method of polyester composite material improves the shortcomings of nano-calcium carbonate in polyester, which is easy to agglomerate, difficult to disperse, and cannot effectively strengthen and toughen polyester materials, and effectively improves the mechanical properties of polyester

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 200 grams of polyethylene glycol phosphate to 70 liters of 10% calcium hydroxide slurry, and stir for 1 hour. When the slurry is at 20°C, feed in purified kiln gas containing 35% carbon dioxide at a speed of 5m 3 / min, when the reaction reaches pH=7, stop aeration. Pumping rate, dry at 120°C until the moisture content is less than 0.3%, to obtain a modified calcium carbonate product.

[0022] Add 50g of modified nano-calcium carbonate and 435g of ethylene glycol into the esterification reaction kettle, raise the temperature to 80°C and stir and disperse for 1 hour; add 0.3g of catalyst tetrabutyl titanate and 500g of dimethyl terephthalate, heat and stir to raise the temperature to 220°C, react until the temperature at the top of the split column drops, and stop the reaction; transfer the esterified product to a polycondensation reactor, then add 0.3 g of catalyst tetrabutyl titanate, vacuumize the reaction system to a pressure of 13.33 KPa, and raise the reaction t...

Embodiment 2

[0024] Add 50g of nano-calcium carbonate, 1g of polyethylene glycol phosphate, and 435g of ethylene glycol into the esterification reaction kettle, raise the temperature to 80°C and stir for 1 hour; add 0.3g of catalyst tetrabutyl titanate, dimethyl terephthalate Heat 500g of ester, heat and stir to raise the temperature to 220°C, react until the temperature at the top of the split column drops, and stop the reaction; transfer the esterification product to a polycondensation reactor, add catalyst tetrabutyl titanate 0.3g, and vacuumize the reaction system to a pressure of 13.33KPa , increase the reaction temperature to 260°C, polycondensate for 2 hours, continue to vacuumize to 133Pa, raise the reaction temperature to 280°C, react for 2 hours, and discharge to obtain CaCO 3 / PET composite material.

Embodiment 3

[0026] Add 50 g of nano-calcium carbonate, 1 g of polyethylene glycol phosphate, and 632 g of 1,4-butanediol into the esterification reaction kettle, heat up to 80° C., and stir for 1 hour; add catalyst tetrabutyl titanate 0.3 g, Dimethyl phthalate 500g, heat and stir to raise the temperature to 220°C, react until the temperature at the top of the split column drops, and stop the reaction; transfer the esterified product to a polycondensation reactor, add catalyst tetrabutyl titanate 0.3g, and vacuumize the reaction The system pressure is 13.33KPa, raise the reaction temperature to 260°C, polycondensate for 2 hours, continue vacuuming to 133Pa, raise the reaction temperature to 280°C, react for 2 hours, and discharge to obtain CaCO 3 / PBT composite material.

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Abstract

The invention discloses a new method for preparing a nano-calcium carbonate / polyester composite material. The nano-calcium carbonate / polyester composite material is successfully prepared by the adoption of the technology of nano-calcium carbonate in situ synthesis and modification and the technology of even dispersion in monomers and in situ esterification and condensation polymerization. Due to the stable suspension and even dispersion of the nano-calcium carbonate particles in the monomers, the modification agent is linked to the surface of the nano-calcium carbonate and participates in esterification reaction to combine the nano-calcium carbonate particles with polyester chemical bonds, thus finally realizing the even dispersion of the nano-calcium carbonate in the polyester without agglomeration, and effectively improving the mechanical property of the polyester. The new method does not change the original production technology and equipment of polyester, thus being easy to realize commercial process.

Description

technical field [0001] A kind of preparation nano-calcium carbonate A new method for polyester composites, specifically related to nanoparticle synthesis, surface modification, in-situ esterification, and polycondensation to prepare nano-calcium carbonate A new approach to polyester composites. Background technique [0002] From carbonated drink bottles to fibers used to make shirts or other clothing, from electrical components, electromechanical housings, furniture to assembly materials for boats, yachts and automobiles, polyesters are used in a variety of applications. However, polyester itself has problems such as slow crystallization speed, difficulty in injection molding, insufficient strength, and easy burning, which have affected the in-depth development and application of polyester. Therefore, the use of polyester synthesis of various monomer combinations, new blending technology, and the application of functional nano-flame retardants, antibacterial agents, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08L67/02C08K9/04
Inventor 王子忱陈雪周兵朱燕超赵旭郭玉鹏
Owner JILIN UNIV
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