Radiation crosslinked polyester elastomer heat shrinkable material

A polyester elastomer, radiation cross-linking technology, applied in plastic/resin/wax insulators, organic insulators, etc., can solve the problems of heat-shrinkable materials that cannot withstand high temperatures, poor oil and chemical resistance, and low toughness, and achieve flex resistance Good bending performance, good oil resistance and chemical solvent resistance, high strength

Active Publication Date: 2012-02-08
CHANGYUAN ELECTRONICS DONGGUAN +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to overcome the problems of existing heat-shrinkable materials such as high temperature resistance, poor oil resistance and chemical resistance, low strength and low toughness, and to provide a high temperature resistant, oil and chemical resistance, high strength and toughness. Radiation-crosslinked polyester elastomer heat-shrinkable material with high efficiency and simple preparation method

Method used

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  • Radiation crosslinked polyester elastomer heat shrinkable material
  • Radiation crosslinked polyester elastomer heat shrinkable material
  • Radiation crosslinked polyester elastomer heat shrinkable material

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preparation example Construction

[0026] The preparation method of the radiation crosslinked polyester elastomer heat shrinkable material of the present invention comprises the following steps:

[0027] Step 1: According to the relative weight ratio, 0-50 parts of halogen-containing flame retardant, 0-20 parts of flame retardant synergist, 0-3 parts of multifunctional acrylate reaction monomer, 0.5-6 parts of antioxidant, light 0-3 parts of stabilizer and 0-5 parts of color masterbatch are fully mixed at room temperature;

[0028] Step 2: Extrude the uniformly mixed substance in step 1 and the polyester elastomer with a relative weight ratio of 100 parts using a twin-screw at a temperature range of 150°C to 250°C, water-cool, air-dry, and pelletize;

[0029] Step 3: extruding the above-mentioned pellets into a tube at a temperature of 150°C-250°C;

[0030] Step 4: irradiate the above-mentioned pipes with gamma rays or electron accelerators, and the radiation dose is 80-250KGY;

[0031] Step 5: Then expand an...

Embodiment 1

[0036] Polyester elastomer substrate (melt index MI=5, melting temperature 170°C) 8Kg and antioxidant 2,2,4-trimethyl-1,2 dihydroquinoline polymer (antioxidant RD) 100g

[0037] {After conversion, 100 parts of polyester elastomer substrate, 1.25 parts of antioxidant}

[0038] Mix evenly in a high-speed mixer at a speed of 60-120rpm, extrude into a pipe at a temperature of 180°C, and water-cool to shape. The screw is then irradiated by an electron beam at a dose of 80KGY, and then expanded twice to become a heat-shrinkable tube.

[0039] Its shrinkage performance is shown in the following table: (shrink in a glycerin pool at 166°C for 3 minutes)

[0040] inner diameter (mm)

Embodiment 2

[0042] Polyester elastomer substrate (melt index MI=5.5, melting temperature 180°C) 8Kg, decabromodiphenylethane 1.6Kg, antimony trioxide 0.64Kg, 2,4,6-tri(2',4' -Dihydroxyphenyl)-1,3,5-triazine 40g, 4,4'-bis(α,α-dimethylbenzyl)diphenylamine (KY-405) 40g, trimethylolpropane triacrylic acid 80g ester, 400g masterbatch,

[0043] {After conversion, the ratio is as follows

[0044] Polyester elastomer substrate 100 parts,

[0045] Antioxidant (4,4'-bis(α,α-dimethylbenzyl)diphenylamine (KY-405)) 0.5 parts,

[0046] 20 parts of halogen-containing flame retardant (decabromodiphenylethane),

[0047] Flame retardant synergist (antimony trioxide) 8 parts,

[0048] Multifunctional acrylate reactive monomer (trimethylolpropane triacrylate) 1 part

[0049] Light stabilizer (2,4,6-tris(2,,4,-dihydroxyphenyl)-1,3,5-triazine) 0.5 part,

[0050] Color masterbatch 5 parts}

[0051] Mix well at a speed of 60-120rpm in a high-speed mixer. Then the strands are extruded through twin-screws at...

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Abstract

The invention relates to a thermal shrinkable material of radiation crosslinking polyester elastomer, comprising the following substances with proportioning by weight: 100 parts of polyester elastomer, 0.5-6 parts of antioxidant, 0-50 parts of halogen-containing flame retardant, 0-20 parts of flame-retardant synergist, 0-3 parts of polyfunctional acrylate reaction monomer, 0-3 parts of light stabilizer and 0-5 parts of master batch. The polyester elastomer is a segmented copolymer which regards crystalline block with high-melting point as a hard segment and regards amorphous block with low glass transition temperature as a soft segment. The antioxidant is a compound mixed by one or more of amine antioxidant, phenolic antioxidant and esters antioxidant. The thermal shrinkable material of radiation crosslinking polyester elastomer has good high temperature resistance, grease resistance and chemical resistance, high strength and toughness and simple preparation method.

Description

technical field [0001] The invention relates to a radiation-crosslinked polyester elastomer heat-shrinkable material. Background technique [0002] Heat shrinkable materials are used in a wide range of applications, including insulation protection of cables in aerospace, aviation, automobiles, and military industries. However, due to the lack of selection and use of existing heat-shrinkable materials that meet the requirements of the base material, the effect of use is relatively poor in occasions that require high temperature, oil resistance and chemical resistance, and require flexural resistance. Contents of the invention [0003] The technical problem to be solved by the present invention is: to overcome the problems of existing heat-shrinkable materials such as high temperature resistance, poor oil resistance and chemical resistance, low strength and low toughness, and to provide a high temperature resistant, oil and chemical resistance, high strength and toughness. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08L71/00C08K5/17C08K5/13C08K5/524C08K5/36C08K5/101B29C47/20B29C47/92B29C71/04B29B9/02H01B3/44B29C48/32B29C48/92
CPCB29C48/09B29C48/92B29C2948/92704B29C2948/92895
Inventor 刘军李代双曾志安莫江泓麦家星鲁雪莲鲁尔兵
Owner CHANGYUAN ELECTRONICS DONGGUAN
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