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Method for preparing natural cross-linking halogen-free flame-retardant polyolefin thermal conductive foam

A natural cross-linking, polyolefin technology, used in carpets and other directions, can solve the problems of poor thermal conductivity, low cost performance, weak flame retardant performance, etc., and achieve the effects of low production cost, simplified production process, and improved production efficiency.

Inactive Publication Date: 2011-04-13
HUBEI LEYUAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects and problems of low cost performance of crosslinking reaction, poor thermal conductivity, and weak flame retardancy existing in the prior art, and provide a crosslinking reaction with high cost performance and good thermal conductivity. , Preparation method of naturally cross-linked halogen-free flame-retardant polyolefin heat-conducting foam with strong flame-retardant performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A method for preparing naturally crosslinked halogen-free flame-retardant polyolefin heat-conducting foam, the preparation method sequentially comprising the following steps:

[0023] The first step: preparation of cross-linking masterbatch A: first take 50 parts by weight of low-density polyethylene resin and add it to the high mixer, then add 15 parts by weight of vinyltrimethoxysilane while stirring, knead for 1 minute, and then add 2 parts by weight of white carbon black, kneaded for 2 minutes, then added 0.75 parts by weight of dicumyl peroxide, 0.5 parts by weight of inhibitor, 1 part by weight of talc and 0.5 parts by weight of lubricant, kneaded for 2- 5 minutes, then discharging, finally vacuum metering packing obtains cross-linking masterbatch A; Described lubricant is the waxy flake powder of polypropylene wax and low molecular weight polyethylene;

[0024] The second step: the preparation of basic raw material B: first take 5-20 parts by weight of low-densit...

Embodiment 1

[0074] Embodiment 1: A kind of preparation method of naturally cross-linked halogen-free flame-retardant polyolefin heat-conducting foam, the preparation method comprises the following steps in sequence:

[0075] The first step: preparation of cross-linking masterbatch A: first take 50 parts by weight of low-density polyethylene resin and add it to the high mixer, then add 15 parts by weight of vinyltrimethoxysilane while stirring, knead for 1 minute, and then add 2 parts by weight of white carbon black, kneaded for 2 minutes, then added 0.75 parts by weight of dicumyl peroxide, 0.5 parts by weight of inhibitor, 1 part by weight of talc and 0.5 parts by weight of lubricant, kneaded for 2- 5 minutes, then discharging, finally vacuum metering packing obtains cross-linking masterbatch A; Described lubricant is the waxy flake powder of polypropylene wax and low molecular weight polyethylene;

[0076] The second step: the preparation of basic raw material B: first take 5 parts by w...

Embodiment 2

[0080] Example 2: Thermally conductive foam with a Shore hardness of 45, with a foaming ratio of 5:

[0081] The first step, the third step, and the fourth step are the same as in Example 1, except that in the second step: first get 15 parts by weight of low-density polyethylene resin, 23 parts by weight of ethylene-vinyl acetate copolymer and 5 parts by weight of Add EPDM rubber into the high mixer, then add 25 parts by weight of flame retardant, 7 parts by weight of heat-conducting material, 5 parts by weight of smoke suppressant, 0.8 parts by weight of antioxidant 1010, and 0.6 parts by weight of lubricating The coloring agent of 1.1 weight parts, the cross-linking masterbatch A of 5 weight parts; The 5th step is to get the foaming masterbatch D of the base raw material B of 100 weight parts, the catalyst masterbatch C of 6 weight parts, 5 weight parts earlier Add to high mixer.

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Abstract

The invention provides a method for preparing natural cross-linking halogen-free flame retardant polyolefin thermal conductive foam. The method comprises the following steps of: kneading low-density polyethylene resin, vinyl tri-methoxysilane, white carbon black and an auxiliary agent, and discharging to prepare a cross-linking master batch A; kneading the low-density polyethylene resin, the ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, the cross-linking master batch A and the auxiliary agent, banburying, and extruding by using a single screw to prepare a basic raw material B; kneading the low-density polyethylene resin, dibutyltin dilaurate and the auxiliary agent, and extruding by using the single screw to prepare a catalyst master batch C; kneading the low-density polyethylene resin, a foaming agent, sodium phosphate dibasic dehydrate and the auxiliary agent, and extruding by using the single screw to prepare a foam master batch D; and kneading the basic raw material B, the catalyst master batch C and the foam master batch D, extruding by using the single screw and foaming by using a foaming furnace to prepared the product. By the method, natural cross-linking effect is good, process is simple and production cost is low; and the product has good thermal conductive performance, strong flame retardant performance and good environmental protection effect.

Description

technical field [0001] The invention relates to a method for preparing heat-conducting foam, in particular to a method for preparing naturally cross-linked halogen-free flame-retardant polyolefin heat-conducting foam, which is particularly suitable for the preparation of heat-conducting foam with good thermal conductivity and good flame retardancy. Background technique [0002] With the prevalence of geothermal heating methods, the floor dedicated to geothermal heating has gradually increased, which requires laying a floor mat between the ground and the floor to isolate the ground from the floor. The main functions of floor mats are: to protect the floor without affecting heat conduction, shockproof and quiet, moisture-proof, environmentally friendly, flame-retardant, heat-resistant and non-deformable. At present, floor mats have a huge market space in China. [0003] Traditional floor mats are mainly in the form of "paper floor mat + floor mat treasure" or "aluminum foil fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L23/16C08K13/02C08K5/5425C08K3/04C08K5/14C08K3/36C08K3/34C08K5/098C08K3/32C08J9/10C08J3/24B29C47/92A47G27/02B29C48/92
Inventor 牛正魏琼
Owner HUBEI LEYUAN NEW MATERIAL TECH
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