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Degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy and preparation method thereof

An alloy, polylactic acid technology, applied in the field of degradable PBT/PLA alloy and its preparation, can solve the problems of limited use, poor toughness of polylactic acid, low heat distortion temperature, etc., to solve the problem of recycling, improve compatibility, Heat resistance improvement effect

Active Publication Date: 2015-05-13
SHENZHEN FUHENG PLASTICS PIGMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid has disadvantages such as poor toughness and low heat distortion temperature, which limit its use as a degradable material in the field of engineering plastics.
[0004] As an electrical component, PBT needs to be recycled or disposed of after being used for a certain period of time. However, among the small and diverse parts, recycling is difficult, and direct incineration will inevitably cause certain pollution to the environment.

Method used

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  • Degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy and preparation method thereof
  • Degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy and preparation method thereof
  • Degradable PBT/PLA (Polybutylece Terephthalate/Poly Lactic Acid) alloy and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0049] The degradable PBT / PLA alloy of the embodiment of the present invention can adopt same preparation method, comprises the following steps:

[0050] (1) Pretreatment of raw materials;

[0051] (2) Take each component according to the following weight percentages:

[0052]

[0053] (3) Mix all the raw materials taken by weighing;

[0054] (4) Add the mixed raw materials into a parallel twin-screw extruder, melt and extrude, and granulate.

[0055] Twin-screw machines are generally divided into the following parts: feeding system, gearbox, main motor, screw, barrel, heating system, vacuum system, cooling system, interlock control system, and electrical control system. Among them, in the temperature control section of the heating system, it is divided into the feeding area, the first area, the second area, the third area, and the fourth area.

[0056] Among them, the process conditions of the melting stage of the parallel twin-screw extruder in the embodiment of the pres...

Embodiment 1

[0058] (1) Pretreatment of raw materials: PBT and PLA were dried separately, the drying temperature of PBT was 120°C for 4 hours; the drying temperature of PLA was 60°C for 4 hours. The remaining materials were dried at 80°C for 6 hours;

[0059] (2) Weigh PBT 73.5kg, PLA 20kg, EMA-GMA 4kg, antioxidant 10100.2kg, antioxidant 1680.2kg, lubricant TAF 0.6kg, transesterification accelerator tetrabutyl titanate 0.5kg, nucleating agent p-tert-butylcalix[8]arene 1kg;

[0060] (3) All the raw materials weighed were mixed in a high-speed mixer for 20 minutes;

[0061] (4) Add the uniformly mixed material into the hopper of the twin-screw extruder, melt, blend and extrude through the twin-screw extruder, water-cool, air-dry, pelletize, and finally bag the finished product of PBT / PLA alloy. Wherein, the screw speed is 200r / min.

[0062] The above-mentioned PBT / PLA alloy was injected into a standard sample, and the test performance is shown in Table 1.

Embodiment 2

[0064] (1) Pretreatment of raw materials: PBT and PLA were dried separately, the drying temperature of PBT was 120°C for 4 hours; the drying temperature of PLA was 60°C for 4 hours. The remaining materials were dried at 80°C for 6 hours;

[0065] (2) Weigh PBT 60kg, PLA 30kg, EMA-GMA 4kg, antioxidant 10760.2kg, antioxidant 1680.2kg, lubricant TAF 0.6kg, PETS 0.4kg, transesterification accelerator tetrabutyl titanate 0.5kg, Nucleating agent p-tert-butylcalix[8]arene 0.5kg;

[0066] (3) All the raw materials weighed were mixed in a high-speed mixer for 20 minutes;

[0067] (4) Add the uniformly mixed material into the hopper of the twin-screw extruder, melt, blend and extrude through the twin-screw extruder, water-cool, air-dry, pelletize, and finally bag the finished product of PBT / PLA alloy. Wherein, the screw speed is 200r / min.

[0068] The above-mentioned PBT / PLA alloy was injected into a standard sample, and the test performance is shown in Table 1.

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Abstract

The invention relates to the technical field of thermoplastic high molecular materials, and discloses a degradable PBT / PLA (Polybutylece Terephthalate / Poly Lactic Acid) alloy which is applied in the aspects of household appliances, articles for daily use, electronic and electrical products and the like. The degradable PBT / PLA alloy consists of the following materials: polybutylene terephthalate, polylactic acid, a compatibilizer, an antioxidant, a nucleating agent, an ester exchange accelerant and a processing auxiliary agent. The invention also discloses a preparation method of the degradable PBT / PLA alloy. The invention aims to provide the degradable PBT / PLA alloy; and the alloy is prepared from the PBT and the degradable plastic PLA and is degraded within a certain time, so that the problem of recovery treatment of the PBT is solved well. The invention also aims to provide the preparation method of the degradable PBT / PLA alloy.

Description

technical field [0001] The invention relates to the technical field of modification of thermoplastic polymer materials, in particular to a degradable PBT / PLA alloy applied to household appliances, daily necessities, electronic appliances and the like and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a milky white translucent to opaque, crystalline thermoplastic polyester with high heat resistance, toughness, fatigue resistance, self-lubrication, low friction coefficient, weather resistance, and low water absorption , is only 0.1%, and still maintains various physical properties (including electrical properties) and electrical insulation in a humid environment, but the volume resistance and dielectric loss are large. PBT is resistant to hot water, alkalis, acids, and oils, but is easily corroded by halogenated hydrocarbons, has poor hydrolysis resistance, can crystallize rapidly at low temperatures, and has good formability. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L67/04C08L23/08C08L33/08C08L33/14C08K5/01C08K5/10B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40
Inventor 郑辉申应军万东波陈玉钦张作宁邱国平
Owner SHENZHEN FUHENG PLASTICS PIGMENT
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