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Method for preparing PET (Polyethylene Terephthalate) engineering plastic particle of attapulgite fast crystallization

A technology of attapulgite and crystalline particles, which is applied in the field of rapid crystallization of PET engineering plastics and its preparation, can solve the problems of complex process routes and high production costs, and achieve the effects of simple production process, low production cost and improved strength

Active Publication Date: 2010-12-01
JIANGYIN JIHUA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the influence of the traditional composite crystallization nucleating agent that adds inorganic powder and polymer crystallization accelerator on the performance of polyester PET by blending, as well as the disadvantages of complicated process route and high production cost, and provides a kind of The process is simple, the addition of additives is small, and the rapid crystallization nucleating agent is stably and uniformly dispersed in the polyester PET macromolecule by copolymerization, and the product performance is greatly improved. Attapulgite rapid crystallization of PET engineering plastic particles Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1. Surface modification of attapulgite

[0021] First add n-butanol to the three-necked flask, then add the silane coupling agent, then add the attapulgite water dispersion with a solid content of 8%, place the three-necked flask in an electric heating mantle to heat and stir, when the temperature rises to the level of n-butanol At the boiling point, keep the temperature constant for 1 hour, stop heating, cool to room temperature, vacuum filter and wash with absolute ethanol, then dry the washed attapulgite at 80°C for 1 hour, and then pulverize to obtain the modified attapulgite. The volume ratio of n-butanol, silane coupling agent and attapulgite aqueous dispersion with 8% solid content is 100:0.5:50.

[0022] Step 2, Synthesis of Attapulgite / PET Rapid Crystallization Particles

[0023] Add attapulgite to ethylene glycol (EG) after modification, stir with a mixer at 1000r / min for 1 hour, and then disperse it by ultrasonic wave for 10 minutes, so that attapulgite...

Embodiment 2

[0027] Step 1. Surface modification of attapulgite

[0028] First add n-butanol into the three-necked flask, then add the silane coupling agent, then add the attapulgite water dispersion with a solid content of 10%, place the three-necked flask in an electric heating mantle to heat and stir, when the temperature rises to

[0029] At the boiling point of n-butanol, keep the temperature for 2 hours, stop heating, cool to room temperature, vacuum filter and wash with absolute ethanol, then dry the attapulgite obtained by washing at 90°C for 2 hours, and obtain the modified attapulgite after crushing earth. The volume ratio of n-butanol, silane coupling agent and attapulgite aqueous dispersion with a solid content of 10% is 200:0.8:100.

[0030]Step 2, Synthesis of Attapulgite / PET Rapid Crystallization Particles

[0031] After modification, the attapulgite was added to ethylene glycol (EG), and the mixer was stirred at 1500r / min for 2 hours, and then ultrasonically dispersed for...

Embodiment 3

[0035] Step 1. Surface modification of attapulgite

[0036] First add n-butanol to the container, then add the silane coupling agent, then add the attapulgite water dispersion with a solid content of 12%, place the three-necked flask in an electric heating mantle to heat and stir, when the temperature rises to the boiling point of n-butanol Keep the temperature at constant temperature for 4 hours, stop heating, cool to room temperature, vacuum filter and wash with absolute ethanol, then air-dry the attapulgite obtained at 110°C for 4 hours, and then pulverize to obtain the modified attapulgite. The volume ratio of n-butanol, silane coupling agent and attapulgite aqueous dispersion with a solid content of 12% is 250:1:150.

[0037] Step 2, Synthesis of Attapulgite / PET Rapid Crystallization Particles

[0038] After modification, the attapulgite was added to ethylene glycol (EG), and the mixer was stirred at 2000r / min for 4 hours, and then ultrasonically dispersed for 30 minutes...

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Abstract

The invention relates to a method for preparing a PET (Polyethylene Terephthalate) engineering plastic particle of attapulgite fast crystallization. The particle is applied to various industries such as aviation, trains, other traffic and transportation systems and the like. The method comprises the following technical steps of: (1) modifying the surface of attapulgite; (2) adding the modified attapulgite in the step (1) to ethylene glycol, stirring, dispersing, adding terephthalic acid, the modified attapulgite and the ethylene glycol dispersion liquid into an esterification kettle for esterification, adding ethylene glycol antimony as a catalyst, mixing, stirring, introducing the mixture into a polycondensation kettle, reacting and discharging to obtain an attapulgite / PET fast crystallization particle; and adding the attapulgite / PET fast crystallization particle into a twin-screw extruder, simultaneously drying and introducing glass fiber into the twin-screw extruder, cooling with water after extrusion, and granulating. The invention has simple technology and low additive addition quantity, a fast crystallization nucleating agent is evenly distributed over a polyester PET macromolecule by a copolymerization mode, and the product performance is greatly improved.

Description

(1) Technical field [0001] The invention relates to a class of rapidly crystallized PET engineering plastics and a preparation method thereof. The engineering plastic has the properties of rapid crystallization and nucleation, high strength and good toughness, and can be used in various industries such as aviation, railway and other transportation systems. (2) Background technology [0002] PET is a thermoplastic engineering plastic with excellent mechanical properties, heat resistance and chemical resistance, so it is widely used in the fields of fibers, bottles and films. At present, there are more and more applications of PET in non-fiber polyester (bottle flakes, films, engineering plastics), and engineering plastics are one of the research and development hotspots in the field of PET non-fiber. However, due to the high rigidity of the main chain of PET and the slow motion of the chain segments, the crystallization speed is relatively slow, which in turn leads to high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08G63/183C08G63/78C08K13/06C08K9/06C08K7/10C08K7/14C09C1/42C09C3/12B29C47/92B29B9/06B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/926B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 顾晓华薛惠振承耀明卞忠华方小兵
Owner JIANGYIN JIHUA NEW MATERIAL
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