Polyethylene resin and preparation method thereof

A technology of polyethylene resin and polyethylene, which is applied in the field of polyethylene resin and its preparation, can solve the problems of poor uniformity of mixed resin, and achieve the effect of high transparency and strong rigidity

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of transparency of LLDPE resin, LDPE or metallocene LLDPE resin is usually blended for modification, but this makes the uniformity of the blended resin poor

Method used

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  • Polyethylene resin and preparation method thereof
  • Polyethylene resin and preparation method thereof
  • Polyethylene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of polyethylene resin, is prepared by weight parts by following material:

[0025]

[0026] The preparation method of the polyethylene resin is: adding nucleating agent HPN-20E, tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) -Propionic acid] pentaerythritol ester, tris(2,4-di-tert-butylphenyl) phosphite, ZnSt and erucamide are uniformly mixed mechanically, melted and granulated by a twin-screw extruder, and obtained after packaging.

[0027] The linear low density polyethylene mentioned above is prepared by the following method: on the Unipol gas phase process polyethylene device, ethylene gas with a volume fraction of 99.9% is used as a raw material, 1-butene is used as a comonomer, and hydrogen is used as a chain Transfer agent, adopts catalyzer SLC-S, carries out gas-phase polymerization gained, and each technological parameter in the polymerization process is shown in Table 1: and tri-n-hexyl aluminum

[0028] Table 1

[0029]

Embodiment 2

[0031] A kind of polyethylene resin, is prepared by weight parts by following material:

[0032]

[0033] The preparation method of the polyethylene resin is: adding nucleating agent HPN-20E, 1,3,5, tri(3,5-di-tert-butyl, 4-hydroxyl benzyl)-s-2,4,6-(1H,3H,5H)trione, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, hydrotalcite and stearic acid amide for mechanical After being uniformly mixed, it is melted and granulated by a twin-screw extruder, and obtained after packaging.

[0034] The linear low-density polyethylene is prepared by the following method: on the Unipol gas-phase process polyethylene device, ethylene gas with a volume fraction of 99.9% is used as a raw material, 1-butene is used as a comonomer, and hydrogen is used as a chain transfer Agent, adopts catalyzer SLC-S, carries out gas-phase polymerization gained, and each technological parameter in the polymerization process is shown in Table 2:

[0035] Table 2

[0036]

[0037] The preparation me...

Embodiment 3

[0039] A kind of polyethylene resin, is prepared by weight parts by following material:

[0040]

[0041] The preparation method of the polyethylene resin is: adding nucleating agent HPN-20E, β-(3,5-di-tert-butyl-4-hydroxyphenyl)-propane to linear low-density polyethylene according to the above weight ratio Octadecyl alcohol ester, tris(2,4-di-tert-butylphenyl) phosphite, calcium stearate and ethylene distearyl diamine were mixed mechanically, and melted by twin-screw extruder tablets, obtained after packaging.

[0042] The linear low-density polyethylene is prepared by the following method: on the Unipol gas-phase process polyethylene device, ethylene gas with a volume fraction of 99.9% is used as a raw material, 1-butene is used as a comonomer, and hydrogen is used as a chain transfer Agent, adopts catalyzer SLC-S, carries out gas-phase polymerization gained, and each technological parameter in the polymerization process is shown in table 3:

[0043] table 3

[0044] ...

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Abstract

The invention discloses a polyethylene resin, which is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 0.1 to 0.3 part of nucleating agent HPN-20E, 0.05 to 0.1 part of antioxidant, 0.02 to 0.1 part of halogen absorber, and 0.05 to 0.10 part of rheology modifier. The linear low-density polyethylene is prepared by the following steps: preparing a Unipol gas phase technology polyethylene device; taking polyethylene gas with a volume percentage of 99.9% as the raw material, 1-butene as the co-monomer, hydrogen as the chain transfer agent, SLC-S as the catalyst, and aluminum diethyl mono-chloride and tri-n-hexyl aluminum as the co-catalyst; and carrying out gas phase polymerization to obtain the polyethylene resin; wherein the partial pressure of ethylene is 0.60 to 0.75 MPa, the mole ratio of hydrogen to ethylene is 0.100-0.225; and the polyethylene resin has the advantages of excellent rigidity and high transparency and can be used in the fields of film and injection molded products.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polyethylene resin and a preparation method thereof. Background technique [0002] In the application field of linear low-density polyethylene (LLDPE), film and injection molded products are its largest applications. LLDPE resins currently on the market generally have good tear strength, impact strength and puncture resistance, but poor rigidity. , so it can only be used in the field of packaging and small injection molding products with low rigidity requirements; in addition, due to structural reasons, LLDPE resin has a large melt dynamic viscosity in blown film processing, and a large number of crystallization and supramolecular structures will be formed when the melt cools , the size of this crystal structure is large enough to cause scattered light, which makes the film prepared by it have poor transparency and cannot meet the packaging and non-packagi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K13/02C08K5/098C08K5/20C08K5/526C08K5/134C08K5/132C08K3/26C08F210/02C08F210/08C08F2/34
CPCC08F210/02C08K3/26C08K5/098C08K5/132C08K5/1345C08K5/20C08K5/526C08K13/02C08K2003/265C08K2201/014C08L2203/16C08L2205/24C08L23/0815C08F210/08C08F2/34
Inventor 陈枫
Owner CHINA PETROLEUM & CHEM CORP
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