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High-flame-retardancy PC composite material suitable for FDM and preparation method

A composite material, high flame retardant technology, applied in the field of FDM molding, can solve the problem of poor flame retardant, achieve the effect of improving the flame retardant effect, reducing thermal degradation and hydrolysis, and avoiding the reduction of mechanical properties

Inactive Publication Date: 2019-06-28
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a highly flame-retardant PC composite material suitable for FDM forming and a preparation method, which increases the polyphosphoric acid by adding a phosphorus-based flame retardant to polycarbonate. The flame retardancy of ester materials, while adding phosphorus flame retardants, anti-dripping agents, halogen-free flame retardant synergists, coupling agents, chain extenders, lubricants, tougheners and ultraviolet rays Absorbent, etc., the purpose of which is to make the obtained composite material have high flame retardancy without affecting the performance of polycarbonate itself, thereby solving the technical problem of poor flame retardancy of products obtained in the FDM field

Method used

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  • High-flame-retardancy PC composite material suitable for FDM and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Take each raw material respectively by weight ratio as follows:

[0044] Polycarbonate raw material: 90 parts

[0045] Red phosphorus flame retardant: 2.09 parts

[0046] PTFE: 0.1 parts

[0047] Synergist FR-18: 0.2 parts

[0048] Silane coupling agent: 2.0 parts

[0049] Silicone oil: 1.0 parts

[0050] Chain extender MDS601: 0.8 parts

[0051] Toughener MBS: 2 parts

[0052] Ultraviolet absorber Chiguard UV-5411: 0.3 parts

[0053] (2) Wash and dry the red phosphorus flame retardant powder, then use alcohol solvent and silane coupling agent to carry out surface modification treatment on it, dry and sieve to obtain the inorganic powder after surface modification;

[0054] (3) Mix the surface-modified red phosphorus flame retardant powder, PC material and low-boiling point organic solvent, keep it warm for a period of time, and finally obtain phosphorus-based flame retardant composite PC material aggregates, which are modified and granulated by twin-screw fo...

Embodiment 2

[0057] (1) Take each raw material respectively by weight ratio as follows:

[0058] Polycarbonate raw material: 85 parts

[0059] Red phosphorus: 3.0 parts

[0060] PTFE: 0.3 parts

[0061] Synergist MMT: 0.2 parts

[0062] Titanate coupling agent: 1.0 parts

[0063] Silicone oil: 2 parts

[0064] Chain extender MDS601: 0.6 parts

[0065] Toughening agent MBS: 0.5 parts

[0066] UV absorber Hostavin B-CAP: 0.3 parts

[0067] (2) Wash and dry the red phosphorus flame retardant powder, then use alcohol solvent and titanate coupling agent to carry out surface modification treatment on it, dry and sieve to obtain surface modified inorganic powder;

[0068] (3) Mix the surface-modified red phosphorus flame retardant powder, PC material and low-boiling point organic solvent, keep it warm for a period of time, and finally obtain phosphorus-based flame retardant composite PC material aggregates, which are modified and granulated by twin-screw for later use ;

[0069] (4) Mix ...

Embodiment 3

[0071] (1) Take each raw material respectively by weight ratio as follows:

[0072] Polycarbonate raw material: 90 parts

[0073] Phosphite: 4.0 parts

[0074] PTFE: 0.3 parts

[0075] Synergist MMT: 0.3 parts

[0076] Silane coupling agent: 0.5 parts

[0077] Silicone oil: 0.2 parts

[0078] Chain extender MDS601: 0.5 parts

[0079] Toughening agent MBS: 0.6 parts

[0080] Ultraviolet absorber Chiguard UV-5411: 0.3 parts

[0081] (2) drying the phosphite flame retardant, then modifying it with an alcohol solvent and a silane coupling agent, drying and sieving to obtain a modified powder;

[0082] (3) Mix the surface-modified phosphite flame retardant powder, PC material and low-boiling point organic solvent, keep it warm for a period of time, and finally obtain the phosphorus-based flame retardant composite PC material aggregate, which is modified and granulated by twin-screw spare;

[0083] (4) Mix and extrude the granulated phosphite flame retardant composite PC ma...

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Abstract

The invention belongs to the field of FDM, and discloses a high-flame-retardancy PC composite material suitable for FDM and a preparation method. The material is prepared from, by mass, 80-100 parts of polycarbonate, 2.0-5.0 parts of a phosphorus flame retardant, 0.1-0.5 part of an anti-dripping agent, 0.1-0.4 part of a halogen-free flame retardant synergist, 0.5-2.0 parts of a coupling agent, 0.1-2.0 parts of a lubricant, 0.5-2.0 parts of a chain extender, 0.5-2.0 parts of a flexibilizer and 0.2-0.5 part of an ultraviolet absorbent. The invention also discloses the preparation method of a composite material wire material. The fluidity of the composite material is improved, parts with high flame retardancy can be manufactured by adopting an FDM mode, and the printed parts maintain other mechanical properties of polycarbonate.

Description

technical field [0001] The invention belongs to the field of FDM molding, and more specifically relates to a high flame-retardant PC composite material suitable for FDM molding and a preparation method. Background technique [0002] Fused Deposition Modeling (FDM) is a forming method of additive manufacturing. Compared with other additive manufacturing forming methods, its equipment is small in size, relatively simple, low in price, and uses low melting point plastic materials, so it is currently the most widely used. A wide range of forming methods is also the most common additive manufacturing method for the public. The processing principle of FDM layered manufacturing makes it suitable for forming three-dimensional complex structures, and shows unique advantages in rapid modeling. Due to the use of low melting point plastics, the main application of FDM forming methods is the manufacture of teaching, shopping malls, toys and other models. [0003] Polycarbonate (Polycar...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L27/18C08L83/04C08L51/04C08K3/02C08K5/54C08K9/06C08K9/04C08K5/524C08K5/521C08K5/5333
Inventor 闫春泽刘主峰李昭青陈鹏杨磊伍宏志史玉升
Owner HUAZHONG UNIV OF SCI & TECH
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