Two-step method for preparing silane naturally crosslinked polyethylene

A technology of natural cross-linking and polyethylene, which is applied in the field of preparation of cross-linked polyethylene, can solve problems such as uneven cross-linking, slow diffusion rate, and limited cross-linking rate, so as to reduce production costs, increase recycling rate, and enhance The effect of mechanical properties and temperature resistance

Inactive Publication Date: 2018-04-20
GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the non-hydrophilicity of polyethylene makes the diffusion rate of water in the product very slow, which limits the crosslinking rate, and the diffusion in the crystalline part is slower, resulting in uneven crosslinking.
In addition, the time required for crosslinking increases with the thickness of the product

Method used

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  • Two-step method for preparing silane naturally crosslinked polyethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A silane naturally crosslinked polyethylene disclosed by the invention comprises 95 parts by weight of material A and 5 parts by weight of material B:

[0043] A material component and the weight ratio of each component are:

[0044] Polyethylene plastic 100 parts;

[0045] The polyethylene plastic is composed of 80 parts of HDPE material and 20 parts of LDPE material.

[0046] 5 parts of alkenyltrimethoxysilane;

[0047] 0.03 parts of benzoyl peroxide;

[0048] B material component name and component weight ratio are:

[0049] Polyethylene plastic 100 parts;

[0050] The polyethylene plastic is composed of 80 parts of HDPE material and 20 parts of LDPE material.

[0051] Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester 10 parts;

[0052] Mesylated acetyl 0.3 parts.

Embodiment 2

[0054] A silane natural cross-linked polyethylene disclosed by the invention comprises 85 parts by weight of material A and 15 parts by weight of material B:

[0055] A material component and the weight ratio of each component are:

[0056] Polyethylene plastic 100 parts;

[0057] 0.3 parts of vinyltriethoxysilane;

[0058] 0.2 parts of tert-butyl peroxide;

[0059] The polyethylene plastic is composed of 90 parts of HDPE material and 10 parts of LDPE material.

[0060] B material component name and component weight ratio are:

[0061] Polyethylene plastic 100 parts;

[0062] 2 parts of tris(2,4-di-tert-butylphenyl)phosphite;

[0063] Acetyl toluene sulfide 6 parts.

Embodiment 3

[0065] A silane naturally cross-linked polyethylene disclosed by the invention comprises 88 parts by weight of material A and 12 parts by weight of material B:

[0066] A material component and the weight ratio of each component are:

[0067] Polyethylene plastic 100 parts;

[0068] The polyethylene plastic is 100 parts HDPE material.

[0069] 2 parts of vinyl trichlorosilane;

[0070] 0.03 parts of tert-butyl peroxybenzoate;

[0071] B material component name and component weight ratio are:

[0072]Polyethylene plastic 100 parts;

[0073] Described polyethylene plastic is made of 100 parts HDPE material.

[0074] 5 parts of tris(2,4-di-tert-butylphenyl)phosphite;

[0075] 5 parts of dodecylbenzenesulfonic acid.

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Abstract

The invention discloses a two-step method for preparing silane naturally crosslinked polyethylene. The method comprises the following steps: step one, carrying out twin-screw extrusion pelletization on a silane grafted polyethylene material at the temperature of 180 to 240 DEG C; step two, carrying out twin-screw extrusion pelletization on a catalyzed polyethylene material at the temperature of 150 to 200 DEG C; and step three, preparing the silane grafted polyethylene material and the catalyzed polyethylene material through extrusion, wherein the silane grafted polyethylene material comprisessilane and polyethylene, and the catalyzed polyethylene material comprises a catalyst and polyethylene. The invention aims to provide a preparation method of the silane naturally crosslinked polyethylene with thorough reaction and high crosslinking uniformity.

Description

technical field [0001] The invention discloses a preparation method of cross-linked polyethylene, in particular, a preparation method of silane natural cross-linked polyethylene. Background technique [0002] In the plastics industry, polyethylene has the largest output, the widest application and the largest consumption, and the amount of waste plastics is quite amazing. According to incomplete statistics, the amount of waste polyethylene accounts for 48% of the total amount of waste plastics. Due to the molecular structure and other reasons, polyethylene waste is difficult to degrade in the natural environment, causing pollution to the environment. With the continuous expansion of the polyethylene consumer market and the continuous increase and diversification of polyethylene consumer products, the amount of waste is also increasing. The recycling of waste polyethylene is the focus of waste plastic recycling. The use of polyethylene cross-linking modification can improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L23/06C08F255/02C08F230/08
CPCC08L51/06C08F255/02C08L2205/03C08L2207/062C08L2207/066C08L2312/08C08F230/08C08L23/06
Inventor 吴浪陈旭东唐孝芬朱永祥赖清泉杜惠娟杨淦锋
Owner GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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