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Preparation method of PC/PET (polycarbonate/polyethylene terephthalate) blend alloy

A mixed gold and high-speed mixer technology, which is applied in the field of preparation of PC and PET blended alloys, can solve the problems of not reaching the flame retardant level, poor toughness, strength, affecting quality and performance, etc., and achieves good flame retardant effect , beautiful appearance and low cost

Inactive Publication Date: 2015-06-03
QINGDAO JIAYIYANG IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since PET is a crystalline polymer and PC is an amorphous polymer, the blending of PC and PET is in a typical amorphous / crystalline blending system, and its compatibility is not good, and the toughness and strength of the mixture of the two are not good. Good, and it does not meet the UL94 V-0 flame rating, which limits its application in some fields
At present, most of the preparation methods of PC and PET blend alloys are made by one-step blending method. The content of some additives is very low, and the one-step blending method may lead to poor dispersion of each component in its alloy system, which will affect the quality and performance

Method used

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Embodiment Construction

[0018] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0019] Preferred embodiment:

[0020] A preparation method of PC and PET blended alloy, comprising the following steps:

[0021] (1) Dry PC in a blast dryer at 110°C-130°C for 3-4 hours, PET at 130°C-150°C for 3-4 hours, nano-montmorillonite and flame retardant respectively Dry at 60°C-80°C for 30-45 minutes and set aside;

[0022] (2) Add 8% of the dried nano-montmorillonite and 0.5% of the silane coupling agent into an ultrasonic oscillator or a high-speed mixer with a rotation speed of not less than 3000 rpm. Stir at a temperature of 80°C to 120°C for 15 to 45 minutes to obtain surface-activated nano-montmorillonite, then cool to below 40°C and discharge for use;

[0023] (3), add the dried PET which accounts for 23% of the total weight and the flame retardant which accounts for 5% of the total weight into the high-speed mixer, and simultane...

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PUM

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Abstract

The invention discloses a preparation method of a PC / PET (polycarbonate / polyethylene terephthalate) blend alloy, which comprises the following steps: (1) respectively drying PC, PET, nano montmorillonite and a flame retardant; (2) stirring and mixing the nano montmorillonite and a silane coupling agent to obtain surface-activated nano montmorillonite; (3) uniformly mixing the PET, flame retardant and surface-activated nano montmorillonite with an antioxidant, a lubricant and other assistants to prepare a PET master batch; and (4) premixing the PC, polyolefin elastomer graft, PET master batch and a compatibilizer in a high-speed mixer, and adding into a double screw extruder to prepare the PC / PET blend alloy. The PC / PET blend alloy, which is prepared by blending the PET master batch prepared by a two-step master batch process, the polyolefin elastomer graft and the PC, has the advantages of favorable dispersity, beautiful appearance, low cost and wide application range.

Description

technical field [0001] The invention relates to a preparation method, in particular to a preparation method of PC and PET blended alloy. Background technique [0002] Polycarbonate (PC) is a type of polymer containing carbonate in the molecular chain. It has particularly good impact strength, thermal stability, and gloss. It is one of the five general-purpose engineering plastics. Its products and consumption are second only to Nylon engineering plastics ranked second. However, PC has the disadvantages of high melt viscosity, difficult molding process and poor solvent resistance, and the price is high. Polyethylene terephthalate (PET) is a semi-crystalline material with very good chemical stability, mechanical strength, electrical insulation properties and thermal stability, especially oil resistance and solvent resistance, but its disadvantages It is low notched impact strength, poor hydrolysis resistance, large molding shrinkage, etc. The blending of PET and PC can impr...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/02C08L51/06C08K13/06C08K9/06C08K3/34C08J3/22C08F255/02
CPCC08F220/325C08F255/02C08J3/226C08J2369/00C08J2467/02C08K2201/011C08K2201/017C08L69/00C08L2201/02C08L2205/035C08L2205/08C08L2205/24C08L67/02C08L51/06C08L23/0884C08K13/06C08K9/06C08K5/103C08K3/346C08K5/1345C08K5/0066C08F222/06C08F220/32
Inventor 不公告发明人
Owner QINGDAO JIAYIYANG IND & TRADE