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High-content fiberglass-reinforced halogen-free flame-retardant PC (polycarbonate) composite and preparation method thereof

A high-content glass fiber and composite material technology, applied in the field of modified engineering plastics, can solve the problems of inability to produce flame-retardant materials, fail to meet the use requirements, and decrease in material toughness, so as to reduce stress cracking performance and notch sensitivity Performance, improvement of low temperature impact performance and weathering resistance, performance improvement effect

Active Publication Date: 2016-06-22
DONGGUAN HONOUR E P
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When the glass fiber content is high, due to the influence of the candle wick effect formed by glass fiber, it is often impossible to produce materials with excellent flame retardancy, which cannot meet the requirements for use. In addition, when the glass fiber content increases, the toughness of the material will drop sharply , the material will easily cause breakage and other damage during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take the above-mentioned 46 parts of polycarbonate, 2 parts of toughening agent methyl methacrylate-butadiene-styrene terpolymer, 11 parts of flame retardant bisphenol A bis(diphenyl phosphoric acid) by weighing ester), 0.5 part of lubricant and 0.1 part of antioxidant 1076 and 0.4 part of antioxidant 168;

[0037] (2) Put the components into a high-speed mixer and mix for 10 to 30 minutes to obtain a uniform mixture;

[0038] (3) Melting and extruding the mixture in a twin-screw extruder, adding 40 parts of alkali-free glass fiber side feed, and granulating to obtain a PC composite material.

[0039] Among them, the twin-screw extruder includes ten temperature control zones, and the temperature of each zone is respectively; the first zone is 180-220°C, the second zone is 220-240°C, the third zone is 240-260°C, the fourth zone is 240-260°C, and the fifth zone is 220- 240°C, six zones 210-230°C, seven zones 200-220°C, eight zones 220-240°C, die head temperature 250-...

Embodiment 2

[0041] (1) Weigh 26 parts of polycarbonate, 20 parts of polycarbonate siloxane-PC copolymer, 2 parts of toughening agent methyl methacrylate-butadiene-styrene terpolymer, 11 parts of flame retardant agent bisphenol A bis(diphenyl phosphate), 0.5 part of lubricant and 0.1 part of antioxidant 1076 and 0.4 part of antioxidant 168;

[0042] (2) Put the components into a high-speed mixer and mix for 10 to 30 minutes to obtain a uniform mixture;

[0043] (3) Melting and extruding the mixture in a twin-screw extruder, adding 40 parts of alkali-free glass fiber side feed, and granulating to obtain a PC composite material.

[0044] Among them, the twin-screw extruder includes ten temperature control zones, and the temperature of each zone is respectively; the first zone is 180-220°C, the second zone is 220-240°C, the third zone is 240-260°C, the fourth zone is 240-260°C, and the fifth zone is 220- 240°C, six zones 210-230°C, seven zones 200-220°C, eight zones 220-240°C, die head tempe...

Embodiment 3

[0046] (1) Weigh 26 parts of polycarbonate, 20 parts of siloxane-PC copolymer, 2 parts of toughening agent methyl methacrylate-styrene-organic silicon copolymer, 8 parts of flame retardant bisphenol A bis( diphenyl phosphate), 3 parts of silicate, 0.5 part of lubricant and 0.1 part of antioxidant 1076 and 0.4 part of antioxidant 168;

[0047] (2) Put the components into a high-speed mixer and mix for 10 to 30 minutes to obtain a uniform mixture;

[0048](3) Melting and extruding the mixture in a twin-screw extruder, adding 30 parts of alkali-free glass fiber and 10 parts of special-shaped glass fiber as side feed, and granulating to obtain a PC composite material.

[0049] Among them, the twin-screw extruder includes ten temperature control zones, and the temperature of each zone is respectively; the first zone is 180-220°C, the second zone is 220-240°C, the third zone is 240-260°C, the fourth zone is 240-260°C, and the fifth zone is 220- 240°C, six zones 210-230°C, seven zon...

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Abstract

The invention discloses high-content fiberglass-reinforced halogen-free flame-retardant PC (polycarbonate) composite and a preparation method thereof, comprising the following components according to percent by weight: 50-60% of polycarbonate, 34-45% of fiberglass, 2-5% of a toughener, 8-20% of a flame retardant, 1-3% of a flame-retardant synergist, 0.1-1% of a lubricant, and 0.1-1% of an antioxidant; the polycarbonate is a mixture of common polycarbonate and siloxane copolymer. The polymer is formed of PC (polycarbonate) and siloxane, PC is amorphous resin with good performance, and the siloxane copolymer has the advantages of low temperature resistance, chemical corrosion resistance, good dielectric property and the like; the siloxane-PC copolymer has the advantages of both the siloxane copolymer and PC and has reduced stress cracking performance and gap sensitivity, improved low temperature impact performance, and improved weathering resistance.

Description

technical field [0001] The invention belongs to the field of modified engineering plastics, and in particular relates to a high-content glass fiber reinforced halogen-free flame-retardant PC composite material and a preparation method thereof. Background technique [0002] With the development of products in the field of electronic appliances, the requirements for material performance are getting higher and higher, especially with the development of the notebook industry, thinner and larger display screens have become the development trend of notebooks, so the choice of notebook shell materials is becoming more and more important. . [0003] Notebook shell materials mainly include the following types: ordinary hard engineering plastic shells, metal shells, carbon fiber shells, and glass fiber modified engineering plastic shells. [0004] Ordinary hard engineering plastic shell materials, commonly used ABS materials, have low strength and poor heat dissipation, and are prone...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L51/04C08L33/12C08K13/04C08K7/14C08K5/523C08K5/134C08K5/526C08J5/04B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704C08J5/043C08J2369/00C08J2433/12C08J2451/04C08J2469/00C08L69/00C08L2201/02C08L2201/22C08L2205/025C08L2205/03C08L2205/035C08L51/04C08K13/04C08K7/14C08K5/523C08K5/1345C08K5/526C08L33/12
Inventor 曹建伟赵国营周宇
Owner DONGGUAN HONOUR E P
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