Injection moulding-use high-rigidity linear low-density polyethylene resin and preparation method thereof

A linear low-density, polyethylene resin technology, applied in the field of polymer materials, can solve the problems of poor use effect, lower material toughness, environmental stress cracking resistance, etc., achieve improved environmental stress cracking resistance, and highlight UV resistance Effects of photoaging, processability, and excellent overall performance

Inactive Publication Date: 2015-10-14
SINOPEC YANGZI PETROCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these modification methods improve the rigidity of the material to a certain extent, they reduce the toughness and environmental stress cracking resistance of the material, and the actual use effect is not very good.

Method used

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  • Injection moulding-use high-rigidity linear low-density polyethylene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method for high-rigidity linear low-density polyethylene resin for injection molding, comprising the steps of:

[0032] (1) Add carbon nanofibers and aminopropyltriethoxysilane coupling agent into a high-speed mixer, mix evenly at 75°C, and modify the surface of carbon nanofibers to obtain surface-modified carbon nanofibers, in which aminopropyl The consumption of triethoxysilane coupling agent is 0.5% of the carbon nanofiber quality;

[0033] (2) 100 parts of linear low-density polyethylene with a melt flow rate of 10g / 10min, 0.2 parts of surface-modified carbon nanofibers, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane Add 0.05 part of pentaerythritol ester, 0.1 part of tris(2,4-di-tert-butylphenyl) phosphite, 0.1 part of light stabilizer 944, 0.1 part of light stabilizer 622, and 0.10 part of oleic acid amide into the high-speed mixer Medium, mix evenly, mix for 5 minutes, then use conventional methods at a temperature of 180°C-240°C, melt and g...

Embodiment 2

[0035] A preparation method for high-rigidity linear low-density polyethylene resin for injection molding, comprising the steps of:

[0036] (1) Add carbon nanofibers and bis(dioctyloxypyrophosphate) ethylene titanate coupling agent NDZ-311 into a high-speed mixer, mix evenly at 80°C, and modify the surface of carbon nanofibers, Obtain surface-modified carbon nanofibers, wherein the consumption of bis(dioctyloxypyrophosphate) ethylene titanate coupling agent is 1% of the mass of carbon nanofibers;

[0037](2) 100 parts of linear low density polyethylene with a melt flow rate of 20g / 10min, 0.5 parts of surface-modified carbon nanofibers, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane Add 0.05 parts of pentaerythritol ester, 0.1 part of tris(2,4-di-tert-butylphenyl) phosphite, 0.2 part of light stabilizer 622, and 0.1 part of polyvinylidene fluoride into a high-speed mixer, mix well, and then Using a conventional method at a temperature of 180°C-240°C, the twin-screw ext...

Embodiment 3

[0039] A preparation method for high-rigidity linear low-density polyethylene resin for injection molding, comprising the steps of:

[0040] (1) Add carbon nanofibers and distearoyloxyisopropoxyaluminate coupling agent SG-Al821 into a high-speed mixer, mix evenly at 85°C, and modify the surface of carbon nanofibers to obtain surface modification Nano carbon fiber, wherein the consumption of distearoyloxy isopropoxy aluminate coupling agent is 3% of the nano carbon fiber quality;

[0041] (2) 100 parts of linear low-density polyethylene with a melt flow rate of 50g / 10min, 0.8 parts of surface-modified carbon nanofibers, 1,3,5,tris(3,5-di-tert-butyl,4-hydroxybenzyl base) 0.7 part of s-triazine-2,4,6-(1H,3H,5H)trione, 0.5 part of 2-hydroxy-4-n-octyloxybenzophenone, 2-(2'-hydroxy-5 Add 0.4 parts of '-tert-octylphenyl) benzotriazole and 0.10 parts of erucamide into a high-speed mixer, mix well, and then use conventional methods at a temperature of 180°C-240°C to extrude through tw...

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Abstract

The invention relates to an injection moulding-use high-rigidity linear low-density polyethylene resin which is prepared from following substances, by weight, 100 parts of linear low-density polyethylene, 0.1-1 part of surface-modified nano-carbon fibers, 0.15-0.9 parts of a photo-stabilizing agent, 0.05-0.3 parts of an anti-oxidizing agent and 0.05-0.10 parts of a rheology modifier. The invention also relates to a preparation method of the injection moulding-use high-rigidity linear low-density polyethylene resin. The injection moulding-use high-rigidity linear low-density polyethylene resin is improved in tensile strength, bending strength, impact property and environmental stress cracking resistance, is improved in both rigidity and toughness, is excellent in ultraviolet light aging resistance and processability, and is excellent in comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-rigidity linear low-density polyethylene (LLDPE) resin for injection molding and a preparation method thereof. The resin has a wide application prospect in the field of injection molding, especially suitable for the field of injection molded parts that require high rigidity of materials, large thin-walled parts, industrial parts and so on. Background technique [0002] Injection molding is one of the largest molding applications of LLDPE. LLDPE injection molding resin has superior toughness and low temperature impact strength. It is usually used in the production of waste bins, household appliances, toys, refrigerators, lids for various containers or made into storage tanks and Large-scale products such as road barriers; in addition, it can also be used for shirt adhesive interlining, carpet underlayment, metal coating, blending modification, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/06C08K9/04C08K7/06
CPCC08K13/06C08K7/06C08K9/04C08K9/06C08L2201/08
Inventor 陈枫
Owner SINOPEC YANGZI PETROCHEM
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