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High-fluidity polyester composition and preparation method

A composition and high-flow technology, applied in the field of polymer composition and its preparation, can solve the problems of excessive polyol addition, high volatile matter, unfavorable industrial production and use, etc., and achieve stable product quality and high production efficiency , the effect of simple process

Inactive Publication Date: 2010-10-06
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as US 1216792, US6822025, EP1041109A2 and JP10310690 disclose the use of polyhydric alcohols to improve material fluidity, such as flow modifiers such as pentaerythritol and dipentaerythritol, but there is a deterioration of material properties, and the addition of polyhydric alcohols is too high. Problems such as excessive volatiles of material products at high temperature
EP0682057A1 discloses the use of dendritic additives to improve the fluidity of polyamide and polyester compositions and maintain their mechanical properties, but the dendritic additives are very expensive and do not utilize industrial production and use

Method used

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  • High-fluidity polyester composition and preparation method

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Experimental program
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Effect test

Embodiment 1-5

[0035] A preparation method of high flow polyester composition, the method may further comprise the steps:

[0036] (1) prepare raw materials according to the component and content in table 1, wherein a is polybutylene terephthalate, the Ultradur B4500 of Basf; b is polyethylene terephthalate, the PET of Shanghai Petrochemical; c d is CIBA IG-1010; e is CIBA IG-168; f is Rohm&Hass' Paraloid EXL-2691A; g is Atfona's Lotader AX8900; h is 2500 mesh talcum powder ; i is 536 of JuShi.

[0037] (2) Put the thermoplastic polyester, flow accelerator, toughening agent and antioxidant in the high-speed mixer according to the above ratio, control the rotating speed at 650rpm, and the time is 30min. After stirring and mixing evenly, the obtained mixture is fed by the main It is fed into the twin-screw extruder, and then the inorganic reinforcing filler is fed into the extruder through side feeding, extruded and pelletized to obtain the product. The screw aspect ratio of the twin-screw e...

Embodiment 6

[0056] A preparation method of high flow polyester composition, the method may further comprise the steps:

[0057] (1) Prepare materials according to the following components and contents:

[0058] 24kg thermoplastic polyester, 0.1kg flow promoter, 1kg antioxidant, 15kg toughening agent, wherein the thermoplastic polyester is polyethylene terephthalate (PET), and the intrinsic viscosity when measuring o-chlorophenol solution at 25°C is 0.52; the flow enhancer is octaphenyl clathrate silsesquioxane, and its structure is as follows:

[0059]

[0060] Wherein R is a methyl group; the antioxidant is triphenyl phosphate (TPP); the toughening agent is acrylonitrile-butadiene-acrylate copolymer (ASA).

[0061] (2) Stir and mix thermoplastic polyester, flow accelerator, toughening agent and antioxidant according to the above ratio through a high-speed mixer, and send the main feed into the twin-screw extruder to control the length of the twin-screw extruder. The diameter ratio i...

Embodiment 7

[0063] A preparation method of high flow polyester composition, the method may further comprise the steps:

[0064] (1) Prepare materials according to the following components and contents:

[0065] 100kg of thermoplastic polyester, 5kg of flow promoter, 0.1kg of antioxidant, 50kg of inorganic reinforcing material, wherein the thermoplastic polyester is polybutylene terephthalate (PBT), and the intrinsic viscosity of o-chlorophenol solution is measured at 25°C is 0.45; the flow enhancer is octaphenyl clathrate silsesquioxane, and the structure is as follows:

[0066]

[0067] Wherein R is an epoxy group; the antioxidant is tetrakis[β-(3,5-di-tert-butyl 4-hydroxyphenyl) propionate] pentaerythritol ester; the inorganic reinforcing material is talcum powder.

[0068] (2) Stir and mix thermoplastic polyester, flow promoter and antioxidant according to the above ratio through a high-speed mixer, and send it into the twin-screw extruder from the main feed, and then add inorganic...

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Abstract

The invention relates to a high-fluidity polyester composition and a preparation method, wherein the composition comprises the following components in parts by weight: 24 to 100 parts of thermoplastic polyester, 0.1 to 5 parts of flow promoter, 0.1 to 1 part of antioxidant, 0 to 15 parts of toughening agent and 0 to 50 parts of inorganic reinforced material, and the preparation method comprises the following steps: uniformly stirring and mixing the thermoplastic polyester, the flow promoter, the toughening agent and the antioxidant according to the proportion through a high-speed mixer, sending into a double-screw extruder through a main feed opening, subsequently adding the inorganic reinforced material into the extruder through a lateral feed opening, extruding and pelletizing to obtain a product. Compared with the prior art, the invention has the advantages of simple and continuous flow, high production efficiency, stable product quality and the like.

Description

technical field [0001] The invention relates to a polymer composition and a preparation method thereof, in particular to a high-flow polyester composition and a preparation method thereof. Background technique [0002] Polyester, copolyester and blends with other thermoplastic resins have high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, low water absorption, and maintain various physical properties in humid environments (including electrical properties), electrical insulation and other characteristics. Widely used in the automotive industry (structural devices such as mirror boxes, electrical components such as headlight reflectors, etc.), electrical components (motor housings, electrical connectors, relays, switches, internal components of microwave ovens, etc.), industrial applications (pump housings , hand tools, etc.) and other fields. However, with the trend of miniaturization, integration and thin-wa...

Claims

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Application Information

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IPC IPC(8): C08L67/00C08L67/02C08L69/00C08K13/02C08K5/5419C08K5/5435B29B9/06
Inventor 李强李文强罗明华李荣群辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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