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Composition containing polyethylene glycol terephthalate and preparation method thereof

A technology of polyethylene terephthalate and polyethylene terephthalate, which is applied in the field of compositions containing polyethylene terephthalate, and can solve extrusion difficulties, difficult processing, and viscosity Increase and other problems, to achieve the effect of reduced torque value, easy processing, and improved lubricity

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the PET composite material produced by this method has high impact strength and tensile strength, due to the addition of chain extenders, nylon nucleating agents, etc., the viscosity increases, making it difficult to extrude and difficult to process.

Method used

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  • Composition containing polyethylene glycol terephthalate and preparation method thereof
  • Composition containing polyethylene glycol terephthalate and preparation method thereof

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preparation example Construction

[0033] In the preparation method of the present invention, in order to further improve the performance of the polyethylene terephthalate-containing composition, it is preferable that the above-mentioned mixture undergoes a 3-5 minute high-speed stirring process before melt extrusion. The uniformly stirred mixture is melt-extruded, and the processability of the obtained composition is better.

[0034] In the preparation method of the present invention, the glass fiber and sodium carbonate are added during extrusion, wherein the glass fiber is added through the glass fiber port of the extruder, and the sodium carbonate is added through a side screw.

[0035] When the composition to be prepared is a composition containing at least one of antioxidant, flame retardant and toughening agent, the timing and way of adding the antioxidant, flame retardant and toughening agent can refer to existing technology. Preferably, the flame retardant is added during the extrusion process, and it...

Embodiment 1

[0052] Cut 100 parts of polyethylene terephthalate (intrinsic viscosity: 0.7dl / g) slices, 5 parts of ultra-fine styrene-butadiene powder rubber (particle size is 50-150 nanometers), 0.5 parts of sodium benzoate, 0.3 parts of anti- Oxygen agent (antioxidant 1010 and antioxidant 168 weight ratio is 2:1), 0.5 part of polyethylene glycol (number average molecular weight is 6000) and 0.02 part of fumaric acid, put into high-speed mixer, under normal temperature Stir for 4 minutes, stir evenly, use WP ZSK25 twin-screw, melt and extrude at the temperature of each section at 230-245-255-260-260-255°C, and add 15 parts of glass fiber (product model 1000#), uniformly mixed 0.04 parts of sodium carbonate and 12 parts of flame retardants (decabromodiphenyl ether and Sb 2 o 3 The weight ratio is 4:1), the time of melt extrusion is 30 seconds, after extrusion, it is cooled and pelletized, and then dried in an oven at a temperature of 100° C. for 8 hours.

Embodiment 2

[0056] 100 parts of polyethylene terephthalate (intrinsic viscosity: 1dl / g) chips, 3 parts of ultra-fine pyrene-butadiene powder rubber (particle size: 50-150 nanometers), 0.5 parts of sodium benzoate, 0.1 parts of antioxidant (the weight ratio of antioxidant 1010 to antioxidant 168 is 3:1), 0.5 part of polyethylene glycol (number average molecular weight is 20000) and 0.02 part of fumaric acid, put it into a high-speed mixer, and stir at room temperature 5min, stir evenly, use WP ZSK25 twin-screw, melt extrusion at the temperature of 230-245-255-260-260-255°C in each section, and add 25 parts of glass fiber (product model 1000 #), uniformly mixed 0.04 parts of sodium carbonate and 10 parts of flame retardant (decabromodiphenyl ether and Sb 2 o 3 The weight ratio is 2:1), the time of melt extrusion is 50 seconds, after extrusion, it is cooled and pelletized, and then dried in an oven at a temperature of 90° C. for 9 hours.

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Abstract

The invention provides a composition containing polyethylene glycol terephthalate, and is characterized in that the composition contains the polyethylene glycol terephthalate, polyethylene glycol, fumaric acid, sodium carbonate, glass fibers and a nucleating agent, wherein relative to 100 parts by weight of the polyethylene terephthalate, the composition comprises 0.3-5 parts by weight of the polyethylene glycol, 0.01-0.3 parts by weight of the fumaric acid, 0.02-0.6 parts by weight of the sodium carbonate, 10-55 parts by weight of the glass fibers and 0.3-0.7 parts by weight of the nucleating agent. The invention further provides a preparation method of the composition containing the polyethylene glycol terephthalate. Compared with present PET material, the composition containing the polyethylene glycol terephthalate is relatively easy to process and for injection molding.

Description

technical field [0001] The invention relates to a composition containing polyethylene terephthalate and a preparation method thereof. Background technique [0002] As an engineering plastic, polyethylene terephthalate (PET) requires high strength and sometimes flame retardancy. When preparing PET engineering plastics, materials with higher molecular weight are required, so their viscosity is also very high; and some reinforcing fillers, flame retardants, etc. must be added during the processing, resulting in excessive viscosity of the system, and the extruder will If the torque is too large, even frictional heat will cause the flame retardant to decompose prematurely, resulting in material performance degradation. In the molding process of injection products, sometimes some products with small cross-sections often lead to unsatisfactory filling and poor fusion of seams due to poor material fluidity, which affects the appearance quality and strength of the product. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L71/08C08K13/04C08K7/14C08K5/092C08K3/26C08K5/098B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92895
Inventor 尹华张师军邵静波吕芸邹浩徐萌杨庆泉
Owner CHINA PETROLEUM & CHEM CORP
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