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A kind of recycled halogen-free flame-retardant pc-abs material and preparation method thereof

A technology of PC-ABS and recycled materials, which is applied in the direction of plastic recycling and recycling technology, can solve the problems of insufficient impact strength and flame retardancy, and achieve good impact resistance and not easy to crack.

Active Publication Date: 2022-03-15
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of insufficient impact strength and flame retardancy of existing PC-ABS materials prepared from PC recycled materials, and to provide a regenerated halogen-free flame-retardant PC-ABS material and its preparation method

Method used

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  • A kind of recycled halogen-free flame-retardant pc-abs material and preparation method thereof
  • A kind of recycled halogen-free flame-retardant pc-abs material and preparation method thereof

Examples

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preparation example Construction

[0027] The invention provides a method for preparing a recycled halogen-free flame-retardant PC-ABS material, comprising the following steps:

[0028] (1) Soak the discarded PC material in a NaCl solution with a mass concentration of 24-26%, and collect the floating PC material;

[0029] (2) Soak the PC material collected in step (1) in a NaCl solution with a mass concentration of 14 to 16%, and collect the sinking PC material;

[0030] (3) Use CaCl with a mass concentration of 0.1 to 10% 2 Mixed solution with NaOH to clean the PC material;

[0031] (4) washing the PC material with water;

[0032] (5) dry to obtain PC recycled material;

[0033] (6) Mix PC recycled material with ABS resin, mixing aid and flame retardant, and plasticize and granulate at 220-235 °C.

[0034] In actual production, the production line included in the preparation method includes: magnetic roller conveyor belt, wet crusher, aggregate screw conveyor, eddy current friction cleaning machine, high-e...

Embodiment 1

[0060] This embodiment provides a method for preparing a recycled halogen-free flame-retardant PC-ABS material, comprising the following steps:

[0061] (1) Firstly, the waste PC material (such as PC bucket material) is transported to the wet crusher for crushing by magnetic roller conveying. Among them, the magnetic field strength of the magnetic roller conveyor belt used is 10000GS, and the magnetic roller speed is 30r / mi. There is a layer of filter in the wet crusher with a mesh diameter of 10mm. After crushing, the block or flake materials smaller than 10mm can enter the conveyor through the filter, and the block or sheet materials larger than 10mm will be broken circularly. PC materials with a particle size of ≤10mm are obtained through a wet crusher.

[0062] Then use the screw conveyor to transfer the PC material to the eddy current friction cleaning machine for friction cleaning, and then use the high-efficiency centrifugal dehydrator for cleaning and dehydration. Am...

Embodiment 2

[0075] The present embodiment is similar to embodiment 1, and the difference is: CaCl in step (3) 2 Change the cleaning time with NaOH mixed solution to 1.5h.

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Abstract

The invention provides a regenerated halogen-free flame-retardant PC-ABS material and a preparation method thereof. The preparation method comprises the steps of: (1) soaking the discarded PC material in a NaCl solution with a mass concentration of 24-26%, collecting the floating PC material; (2) soak the PC material collected in step (1) in a NaCl solution with a mass concentration of 14 to 16%, and collect the sinking PC material; (3) use a mass concentration of 0.1 to 10% CaCl 2 Wash the PC material with the mixed solution of NaOH; (4) wash the PC material with water; (5) dry to obtain the PC recycled material; (6) mix the PC recycled material with ABS resin, mixing aid and flame retardant, Plasticize and granulate at 220-235°C. In the process of recovering PC materials, the present invention adopts different concentrations of brine to carry out flotation, and combined with appropriate cleaning steps, the obtained PC recycled materials can be directly used to prepare PC-ABS materials and regenerate halogen-free flame-retardant PC-ABS materials. Flame retardant can reach UL94 V‑0 level, has good impact resistance and is not easy to crack.

Description

technical field [0001] The invention belongs to the technical field of resource recovery, in particular to a recycled halogen-free flame-retardant PC-ABS material and a preparation method thereof. Background technique [0002] The thermoplastic plastic PC-ABS, which is a combination of polycarbonate (PC) and polyacrylonitrile (ABS), combines the easy formability of ABS materials with the strong mechanical properties of PC, high impact strength, high temperature resistance, and UV resistance. (UV) and other properties, can be widely used in automotive interior parts, home appliances and other fields. [0003] In order to save energy and reduce costs, many companies try to recycle waste plastics. However, there are few reports on the PC recycling process at present, and the impact strength of the PC-ABS material prepared from the recycled PC material is obviously not as good as that of the new material, and the flame retardancy is also greatly affected. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L55/02C08L27/18C08L51/04C08K5/00C08K5/521B29B17/02B29B17/00
CPCC08L69/00B29B17/02B29B17/00C08L2201/02C08L2201/22C08L2207/20C08L2205/035C08L2207/53B29B2017/0244B29B2017/0203B29B2017/0015C08L55/02C08L27/18C08L51/04C08K5/00C08K5/521Y02W30/62
Inventor 陈锐彬沈旭渠刘鹏辉陈新泰杨海民田凯丽
Owner GUANGDONG JUSHI CHEM CO LTD