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A high fluidity, bending, halogen-free, expansion flame retardant glass fiber reinforced polypropylene composite material for coil skeleton and its preparation method

A high-fluidity, coil skeleton technology, applied in the field of high-fluidity, bending-resistant, halogen-free, intumescent flame-retardant glass fiber reinforced polypropylene composite materials and their preparation, can solve the problem of not meeting the development trend of non-halogenation and failing to meet the flame retardant grade. applications, etc., to reduce dimensional instability, reduce interfacial tension, and improve the degree of wetting

Active Publication Date: 2020-08-18
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 101875738A discloses a flame-retardant glass fiber reinforced polypropylene composite material used in this field, but the traditional bromine-antimony flame-retardant system used in this invention does not conform to the development trend of halogen-free in this field today
The flame retardant grade of the halogen-free flame retardant polypropylene special material announced by CN103756152A is only V2 level, which cannot meet the application occasions with higher flame retardant grade requirements
Unfortunately, there is no report on the high fluidity and bending resistance of the halogen-free flame-retardant polypropylene composite material for the coil bobbin

Method used

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  • A high fluidity, bending, halogen-free, expansion flame retardant glass fiber reinforced polypropylene composite material for coil skeleton and its preparation method
  • A high fluidity, bending, halogen-free, expansion flame retardant glass fiber reinforced polypropylene composite material for coil skeleton and its preparation method
  • A high fluidity, bending, halogen-free, expansion flame retardant glass fiber reinforced polypropylene composite material for coil skeleton and its preparation method

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preparation example Construction

[0060] The preparation method of the high-fluidity bending-resistant halogen-free expansion flame-retardant glass fiber-reinforced polypropylene composite material used for the coil skeleton comprises the following steps:

[0061] 1) Preparation of flame retardant masterbatch: Weigh the raw materials according to the composition of the flame retardant masterbatch, first mix polypropylene copolymer, POE-g-MAH, hyperbranched polymer, active nano zinc oxide, antioxidant and lubricant , added to the main feeding port of the twin-screw extruder, and the nitrogen-phosphorus compound flame retardant was added from the side feeding port, extruded and granulated to obtain a flame-retardant masterbatch;

[0062] 2) Preparation of glass fiber masterbatch: Weigh the raw materials according to the composition of the glass fiber masterbatch, first mix homopolypropylene, PP-g-MAH, α nucleating agent, hyperbranched polymer, antioxidant and lubricant Mixing and sending to twin-screw extruder, ...

Embodiment 1

[0078] (1) Preparation of flame retardant masterbatch: 33 parts of BX3920, 5 parts of POE-g-MAH, 0.5 part of hyperbranched polymer, 0.5 part of active nano-zinc oxide, 0.4 part of antioxidant and 0.6 part of lubricant were processed at high speed After stirring and mixing evenly, add it from the main feeding port, and then add 60 parts of nitrogen-phosphorus compound flame retardant into the extruder from the side feeding in two times, and finally obtain particles with a length of about 3.5mm, which are flame retardant The agent content is 60% flame retardant masterbatch.

[0079] (2) Preparation of glass fiber masterbatch: first stir 44 parts of H7900, 5 parts of PP-g-MAH and 1‰ white oil (the purpose of adding is to absorb nucleating agent and hyperbranched polymer), and then add 0.1 Part α nucleating agent, 0.3 part hyperbranched polymer, 0.3 part antioxidant, 0.3 part lubricant, after stirring evenly, after being plasticized by a twin-screw extruder with a length-to-diamet...

Embodiment 2

[0082] (1) Preparation of flame retardant masterbatch: 33 parts of BX3920, 5 parts of POE-g-MAH, 0.5 part of hyperbranched polymer, 0.5 part of active nano-zinc oxide, 0.4 part of antioxidant and 0.6 part of lubricant were processed at high speed After stirring and mixing evenly, add it from the main feeding port, and then add 60 parts of nitrogen-phosphorus compound flame retardant into the extruder from the side feeding in two times, and finally obtain particles with a length of about 3.5mm, which are flame retardant The agent content is 60% flame retardant masterbatch.

[0083] (2) Preparation of glass fiber masterbatch: first stir 34 parts of H7900, 5 parts of PP-g-MAH and 1‰ white oil (the purpose of adding is to absorb nucleating agent and hyperbranched polymer), and then add 0.1 Part α nucleating agent, 0.3 part hyperbranched polymer, 0.3 part antioxidant, 0.3 part lubricant, after stirring evenly, after being plasticized by a twin-screw extruder with a length-to-diamet...

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Abstract

The invention discloses a high-flow bending-resistant halogen-free expanded flame-retardant glass fiber reinforced polypropylene composite material for coil skeletons and a preparation method thereof.The polypropylene composite consists of 40%-60% by mass of a flame-retardant masterbatch and balanced glass fiber masterbatch. The invention also discloses a preparation method of the polypropylene composite material. According to the polypropylene composite material and the preparation method thereof, a hyperbranched polymer is added, so that the fluidity of the polypropylene composite materialis obviously improved, the spiral line flow length is improved, the molding time is shortened, and the processing efficiency is improved; in addition, the bending property and processing efficiency ofthe composite material are significantly improved through the addition of an alpha nucleating agent with isotropic shrinkage characteristics; the flame-retardant effect of the composite material reaches V0 at a thickness of 0.8 mm by introducing active nanometer zinc oxide and adopting double-stage side feeding; and finally, high-flow POE-g-MAH and high-flow high-rigidity copolymerized polypropylene play a synergistic effect on the bending resistance of the coil skeletons.

Description

technical field [0001] The invention relates to a high-fluidity, bending-resistant, halogen-free, expansion-flame-retardant glass fiber-reinforced polypropylene composite material for a coil skeleton and a preparation method thereof. Background technique [0002] Coil bobbins and small devices on the market, such as electronic transformers, relays, and solenoid valves, mainly use engineering plastics such as flame-retardant PA, flame-retardant PBT, and PPO. However, these materials have the problem of high cost. At the same time, for nylon-like materials, there is even a problem of easy water absorption. [0003] Polypropylene is an alternative material favored by the industry due to its low cost, non-hygroscopic properties, good electrical properties and high-frequency insulation. CN 101875738A discloses a flame-retardant glass fiber-reinforced polypropylene composite material used in this field. However, the traditional bromine-antimony flame-retardant system used in this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08L67/00C08L91/00C08K13/04C08K7/14C08K3/22C08K5/134C08K5/526C08J3/22C08J5/04C08J5/10
CPCC08J3/226C08J5/043C08J5/10C08J2323/12C08J2423/14C08J2451/06C08J2467/00C08J2491/00C08K5/1345C08K5/526C08K7/14C08K13/04C08K2003/2296C08K2201/011
Inventor 曾宪伸陈新泰沈旭渠龚文幸张翼翔
Owner GUANGDONG JUSHI CHEM CO LTD
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