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Halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush and preparation method thereof

A heat-shrinkable sleeve, high flame-retardant technology, applied in the field of halogen-free, red phosphorus-free, high-flame-retardant heat-shrinkable sleeve and its preparation, can solve the problem of carcinogenicity of toxic and harmful gases, high shrinkage response temperature, personal and environmental damage, etc. problems, to achieve the effects of excellent comprehensive product performance, low shrinkage temperature response, and rapid industrial production.

Active Publication Date: 2016-07-27
SHANGHAI CHANGYUAN ELECTRONICS MATERIAL +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous development of life and the level of science and technology, more and more problems are exposed to halogen-containing flame retardants in use. Statistics show that in some fire accidents, the inhalation of a large amount of toxic smoke produced by the combustion of halogen-containing flame retardant materials caused The number of deaths from suffocation often accounts for more than half of the number of fire deaths. At the same time, the toxic and harmful gases produced during combustion are carcinogenic and cause great harm to people and the environment. Therefore, halogenated flame retardants have gradually withdrawn from the stage of history. , and is strictly restricted to use
[0004] Subsequently, major manufacturers began to use hydroxide as a flame retardant to manufacture heat-shrinkable tubes. However, a large amount of hydroxide needs to be added to achieve a certain flame-retardant effect, and it can produce better synergistic resistance after compounding with red phosphorus. Flammability, but this material has a greater impact on the mechanical properties of the product, even so, hydroxide has become the mainstream halogen-free flame retardant method in the market today
[0005] In recent years, it has been found that the use of red phosphorus can also cause short circuits in electronic circuit boards. At the same time, the burning of red phosphorus will also produce a small amount of toxic gas, and it needs to be strictly controlled during storage, otherwise safety accidents such as explosions will occur. Its inherent color also limits its use
On the other hand, the mainstream halogen-free heat-shrinkable sleeves on the market generally have a high shrinkage response temperature, which cannot meet the requirements of some specific occasions. Tube

Method used

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  • Halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush and preparation method thereof
  • Halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush and preparation method thereof
  • Halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush and preparation method thereof

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preparation example Construction

[0039] A method for preparing a halogen-free, red-phosphorus-free, high-flame-retardant heat-shrinkable sleeve, which is applied to the above-mentioned halogen-free, red-phosphorus-free, high-flame-retardant heat-shrinkable sleeve, specifically includes the following steps:

[0040] S110 Prepare the raw materials according to the above formula ratio;

[0041] S120 Put the phosphorus-nitrogen compound flame retardant in the raw material in a high-speed mixer and stir for 5 minutes to compound;

[0042] S130 Put the raw materials into an internal mixer in turn and mix them for 10-20min in a temperature environment of 80-150°C;

[0043] In S140, pass the agglomerate mixture through a screw granulator to form masterbatch;

[0044] In S150, the masterbatch is placed in a single screw, extruded at an ambient temperature of 80-150°C, cooled and shaped into a pipe;

[0045] S160 Radiation cross-linking of the pipe through cobalt 60 or an electron accelerator with an irradiation dose...

specific Embodiment 1

[0048]Prepare materials according to the following formula: melt index is 40Kg (equivalent to 80 parts) of ethylene-vinyl acetate copolymer of 3-5g / 10min, wherein, the percentage of vinyl acetate content is 28%; Melt index is 2-4g / 10min Ethylene-methyl methacrylate copolymer 5Kg (corresponding to 10 parts), wherein, the percentage of the content of methyl acrylate is 8%-40%; Melt index is the ethylene-octene copolymer 5Kg of 0.5-2g / 10min ( Equivalent to 10 parts), wherein the content of octene is 20-30%; particle size d 99 Phosphorus nitrogen compound flame retardant ≦10μm 45Kg (equivalent to 90 parts), particle size d 99 Melamine cyanurate ≦10μm 10Kg (equivalent to 20 parts); compatibilizer (maleic anhydride grafted ethylene-vinyl acetate copolymer) 2Kg (equivalent to 4 parts) with a grafting rate of 0.6-2.0%; lubrication agent zinc stearate 2Kg (equivalent to 4 parts); composite antioxidant 1.5Kg (equivalent to 3 parts); carbon black 2Kg (equivalent to 4 parts).

[0049] S...

specific Embodiment 2

[0052] Prepare materials according to the following formula: melt index is 40Kg (equivalent to 80 parts) of ethylene-vinyl acetate copolymer of 3-5g / 10min, wherein, the percentage of the content of vinyl acetate is 28%; Melt index is 0.5-2g / 10min 15Kg (equivalent to 30 parts) of ethylene-octene copolymer, wherein, the percentage composition of octene content is 20-30%; Particle diameter d 99 Phosphorus nitrogen compound flame retardant ≦10μm 40Kg (equivalent to 80 parts), particle size d 99 15Kg (equivalent to 30 parts) of melamine cyanurate ≦10μm; 2Kg (equivalent to 4 parts) of compatibilizer (maleic anhydride grafted ethylene-vinyl acetate copolymer) with a grafting rate of 0.6-2.0%; lubrication The agent is 2Kg (equivalent to 4 parts) of silicon masterbatch containing 30-60% organic silicon compound; 1.5Kg (equivalent to 3 parts) of composite antioxidant.

[0053] Specifically, the preparation method applied to the above-mentioned specific examples is: stir the phosphorus-...

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Abstract

The invention relates to a halogen-free red phosphorus-free eco-friendly material and a use thereof and especially relates to a halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush and a preparation method thereof. The halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush comprises, by weight, 80-100 parts of an ethene-vinyl acetate copolymer, 5-30 parts of an ethene-octylene copolymer and / or an ethene-butene copolymer and / or an ethene-ethyl acrylate copolymer and / or an ethene-methyl methacrylate copolymer, 90-120 parts of a phosphor-nitrogen composite fire retardant, 1-10 parts of a compatilizer, 1-10 parts of a lubricant and 1-10 parts of a composite anti-oxidant. In halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush production, an inorganic material is used as a raw material and does not contain red phosphorus and halogens so that an environmental protection level is high, poisonous and harmful gas produced through red phosphorus and halogens is avoided, human health is protected and environmental friendliness is obtained. The halogen-free red phosphorus-free high-flame retardation heat-shrinkable bush has low contraction temperature responsiveness, can completely shrink at a temperature of less than or equal to 95 DEG C and has a low shrinkage temperature.

Description

technical field [0001] The invention relates to a halogen-free, red-phosphorus-free environmental protection material and its application, in particular to a halogen-free, red-phosphorus-free, high flame-retardant heat-shrinkable sleeve and a preparation method thereof. Background technique [0002] In the early days, the mainstream heat-shrinkable sleeves on the market were mainly halogen-containing products, because the halogen-containing flame retardants were added in a small amount and had excellent flame-retardant properties. in industrial production. [0003] With the continuous development of life and the level of science and technology, more and more problems are exposed to halogen-containing flame retardants in use. Statistics show that in some fire accidents, the inhalation of a large amount of toxic smoke produced by the combustion of halogen-containing flame retardant materials caused The number of deaths from suffocation often accounts for more than half of the...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L51/06C08K13/02C08K3/32C08K5/3492B29C69/02B29C35/08
Inventor 龙鹏李代双甘立民许兰杭
Owner SHANGHAI CHANGYUAN ELECTRONICS MATERIAL
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