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A low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass ul94-5va and its preparation method

A flame retardant polypropylene and short glass fiber technology, applied in the field of flame retardant modified materials, can solve the problems of decreased flame retardant efficiency, high price and high material cost

Active Publication Date: 2021-03-19
GUANGDONG JUSHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The halogen-free flame retardants used in the glass fiber reinforced halogen-free flame-retardant polypropylene materials reported by CN106995559A and CN103827197A are high-priced piperazine pyrophosphate flame retardants. Although the flame-retardant grade can reach 5VA, the material cost is high. Even higher than the traditional flame retardant ABS, so it is difficult to promote the application
[0005] Since the shear heat of glass fiber will lead to the decomposition of ammonium polyphosphate, the flame retardant efficiency will be greatly reduced. Therefore, in the glass fiber reinforced flame retardant system, it is difficult to use ammonium polyphosphate to achieve flame retardant 5VA grade, and there is no relevant literature report

Method used

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  • A low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass ul94-5va and its preparation method
  • A low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass ul94-5va and its preparation method
  • A low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass ul94-5va and its preparation method

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preparation example Construction

[0044] The preparation method of this low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass UL94-5VA includes the following steps:

[0045] 1) taking raw materials according to the aforementioned composition;

[0046] 2) Preparation by double-stage side-feeding twin-screw extruder: mix polypropylene, compatibilizer, antioxidant, lubricant and emulsion anti-dripping agent evenly, and put them into the main feeding port; P-N expansion type The flame retardant and the flame retardant synergist are evenly mixed and put into the first-stage side feed port; the chopped glass fiber is put into the second-stage side feed port; the material is extruded through a twin-screw extruder and pelletized to obtain Low cost can pass UL94-5VA short glass fiber reinforced halogen-free flame retardant polypropylene material.

[0047] Preferably, in the preparation method, the twin-screw extruder has an aspect ratio of 48:1 and is divided into 12 s...

Embodiment 1

[0054] Embodiment 1 (10% glass fiber reinforced flame-retardant polypropylene):

[0055] (1) Raw material ratio: a low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass UL-94 5VA, which consists of the following raw material components in parts by mass: 60.7 parts of polypropylene EP548R, 21.7 parts Ammonium polyphosphate, 4.3 parts of carbon forming agent, 0.5 parts of nano-zinc oxide, 10 parts of alkali-free short glass fiber, 2 parts of PP-g-MAH, 0.3 parts of antioxidant, 0.3 parts of lubricant, 0.2 parts of emulsion type anti-dripping drop agent.

[0056] (2) Preparation method: Stir 60.7 parts of EP548R, 2 parts of PP-g-MAH, 0.3 part of antioxidant, 0.3 part of lubricant, and 0.2 part of emulsion type anti-dripping agent, and feed them from the main feed; 21.7 parts of ammonium polyphosphate, 4.3 parts of carbon forming agent and 0.5 parts of nano-zinc oxide are stirred evenly and fed from the first-stage side feed; 10 pa...

Embodiment 2

[0058] Embodiment 2 (15% glass fiber reinforced flame-retardant polypropylene):

[0059] (1) Raw material ratio: a low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material that can pass UL-94 5VA, which consists of the following raw material components in parts by mass: 52.1 parts of polypropylene EP548R, 23.2 parts Ammonium polyphosphate, 5.8 parts of carbon forming agent, 0.7 parts of nano-zinc oxide, 15 parts of alkali-free short glass fiber, 2.5 parts of PP-g-MAH, 0.3 parts of antioxidant, 0.3 parts of lubricant, 0.1 part of emulsion type anti-dripping drop agent.

[0060] (2) Preparation method: Stir 52.1 parts of EP548R, 2.5 parts of PP-g-MAH, 0.3 part of antioxidant, 0.3 part of lubricant, and 0.1 part of emulsion type anti-dripping agent, and feed them from the main feed; 23.2 parts of ammonium polyphosphate, 5.8 parts of carbon forming agent and 0.7 parts of nano-zinc oxide are stirred evenly and fed from the first-stage side feed; 15...

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Abstract

The invention discloses a low-cost UL-94-5VA-qualified chopped glass fiber enhanced halogen-free flame-retardant polypropylene material and a preparation method thereof. The polypropylene material contains the following raw materials in parts by mass: 40-70 parts of polypropylene, 5-30 parts of chopped glass fibers, 24-35 parts of a P-N swelling flame retardant, 0.3-1 part of a flame-retardant synergist, 2-10 parts of a compatilizer, 0.3-0.5 part of a lubricant, 0.2-0.4 part of an antioxidant and 0.1-0.2 part of an emulsion-type anti-dripping agent. The invention further discloses the preparation method of the low-cost UL-94-5VA-qualified chopped glass fiber enhanced halogen-free flame-retardant polypropylene material. The polypropylene material is low in cost and density, high in glowingfilament and yield and stable in molding shrinkage rate, and the flame retardance of the polypropylene material can reach a UL-94-5VA level.

Description

technical field [0001] The invention relates to a low-cost short glass fiber reinforced halogen-free flame-retardant polypropylene material capable of passing UL94-5VA and a preparation method thereof, belonging to the field of flame-retardant modified materials. Background technique [0002] Polypropylene has the characteristics of low cost, non-hygroscopicity, good electrical properties, corrosion resistance and high insulation properties, making it a favored alternative material in the home appliance industry. However, polypropylene raw materials are easy to burn and cause fires, and the large molding shrinkage leads to unstable product dimensions. Especially in recent years, the new energy battery industry and the home appliance industry have increasingly stringent requirements on product size and fire rating. The development of flame-retardant polypropylene with high flame-retardant grade and low shrinkage is the future development trend, especially glass fiber-reinforc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08K13/06C08K9/06C08K7/14C08K3/32C08K3/22
CPCC08K2003/2296C08K2003/323C08K2201/003C08K2201/004C08K2201/011C08L23/12C08L2201/02C08L2201/22C08L51/06C08K13/06C08K9/06C08K7/14C08K3/32C08K3/22
Inventor 陈新泰龚文幸曾宪伸张翼翔李函坚佘豪杰黄方雁
Owner GUANGDONG JUSHI CHEM CO LTD