Novel composite additive for tubular high-pressure polyethylene and preparation method of novel composite additive

A technology of high-pressure polyethylene and compound additives, applied in the field of polyethylene additives, can solve the problems of reducing the squatting rate, loss of production and processing enterprises, poor transparency, etc., and achieves the improvement of antioxidant performance, which is beneficial to environmental protection production and reduces the addition of additives. amount of effect

Active Publication Date: 2021-12-24
ZIBO LINZI ALINDA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, in the production of polyethylene film, the film rate and the flatness of the produced film are difficult problems for processing enterprises. Poor pulling force and other reasons make the output rate of high-quality products in the finished product low, which brings a lot of losses to the production and processing enterprises
[0009]At present, most of the existing additives on the market are simply compounded, and the products produced are not stable enough, and cannot be mixed uniformly with polyethylene, so that the final product The squatting film rate remains high, and companies can only simply reduce the squatting film rate by increasing the amount of additives. Simply increasing the amount of additives will have a greater impact on other indicators such as transparency, haze, and streaks.

Method used

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  • Novel composite additive for tubular high-pressure polyethylene and preparation method of novel composite additive
  • Novel composite additive for tubular high-pressure polyethylene and preparation method of novel composite additive
  • Novel composite additive for tubular high-pressure polyethylene and preparation method of novel composite additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The new composite additive for tubular high-pressure polyethylene described in Example 1 consists of the following raw materials in parts by weight:

[0043]

[0044] in:

[0045] The LDPE resin is a mixture of LDPELD605 and LDPELD607; wherein the mass ratio of LDPELD605 to LDPELD607 is 1:1; the density of the LDPELD605 is 0.922g / cm 3 , the melt index is 6.0g / 10min, the tensile strength at break is 8MPa; the density of the LDPE607 is 0.921g / cm 3 , Melt index is 7.5g / 10min, tensile strength at break is 9MPa.

[0046] SiO in the described silicon dioxide powder 2 The content of > 99%.

[0047] The particle size of the diatomite D50 is 3.5um, and the density is 2.0g / cm 3 , the specific surface area is 40m 2 / g; in mass percentage, including the following chemical composition: SiO 2 94%, Fe 2 o 3 0.8%, Al 2 o 3 1.2% and CaO 0.6%.

[0048] The erucamide has a melting point of 80-83°C, an iodine value of 72-77gl2 / 100g, and an amide content of ≥98wt%.

[0049] T...

Embodiment 2

[0060] The new composite additive for tubular high-pressure polyethylene described in Example 2, in parts by weight, consists of the following raw materials:

[0061]

[0062]

[0063] in:

[0064] The LDPE resin is a mixture of LDPELD605 and LDPELD607; wherein the mass ratio of LDPELD605 to LDPELD607 is 1:1.2; the density of the LDPELD605 is 0.922g / cm 3 , the melt index is 6.0g / 10min, the tensile strength at break is 8MPa; the density of the LDPE607 is 0.921g / cm 3 , Melt index is 7.5g / 10min, tensile strength at break is 9MPa.

[0065] SiO in the described silicon dioxide powder 2 The content of > 99%.

[0066] The particle size of the diatomite D50 is 3.5um, and the density is 2.0g / cm 3 , the specific surface area is 40m 2 / g; in mass percentage, including the following chemical composition: SiO 2 94%, Fe 2 o 3 0.8%, Al 2 o 3 1.2% and CaO 0.6%.

[0067] The erucamide has a melting point of 80-83°C, an iodine value of 72-77gl2 / 100g, and an amide content of ≥98...

Embodiment 3

[0079] The new composite additive for tubular high-pressure polyethylene described in Example 3, in parts by weight, consists of the following raw materials:

[0080]

[0081] in:

[0082] The LDPE resin is a mixture of LDPELD605 and LDPELD607; wherein the mass ratio of LDPELD605 to LDPELD607 is 1:1.5; the density of the LDPELD605 is 0.922g / cm 3 , the melt index is 6.0g / 10min, the tensile strength at break is 8MPa; the density of the LDPE607 is 0.921g / cm 3 , Melt index is 7.5g / 10min, tensile strength at break is 9MPa.

[0083] SiO in the described silicon dioxide powder 2 The content of > 99%.

[0084] The particle size of the diatomite D50 is 3.5um, and the density is 2.0g / cm 3 , the specific surface area is 40m 2 / g; in mass percentage, including the following chemical composition: SiO 2 94%, Fe 2 o 3 0.8%, Al 2 o 3 1.2% and CaO 0.6%.

[0085] The erucamide has a melting point of 80-83°C, an iodine value of 72-77gl2 / 100g, and an amide content of ≥98wt%.

[008...

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Abstract

The invention belongs to the technical field of additives for polyethylene, and particularly relates to a novel composite additive for tubular high-pressure polyethylene and a preparation method of the novel composite additive. The novel composite additive for tubular high-pressure polyethylene is prepared from the following raw materials in parts by weight: 50 to 60 parts of LDPE resin, 10 to 14 parts of silicon dioxide, 9 to 15 parts of diatomite, 12 to 17 parts of erucyl amide, 1 to 2 parts of oleamide, 7 to 11 parts of antioxidant and 7 to 9 parts of monostearin. The novel composite additive for tubular high-pressure polyethylene is easy to mix with polyethylene, good in dispersity, simple to operate, low in addition amount and more beneficial to environment-friendly production, and the opening performance, the smoothness and the oxidation resistance of the produced polyethylene raw material can be further improved; and the indexes such as fisheye, stripe, density, haze, fracture stress and tensile fracture nominal strain of the tubular high-pressure polyethylene product can be improved to different degrees.

Description

technical field [0001] The invention belongs to the technical field of additives for polyethylene, and in particular relates to a novel composite additive for tubular high-pressure polyethylene and a preparation method thereof. Background technique [0002] Polyethylene is the product of ethylene monomer polymerization. It has the characteristics of tensile resistance, easy processing, high thermal decomposition temperature and excellent comprehensive performance. Due to its stable chemical properties, it is not easy to be corroded. Polyethylene is often used in parts, equipment or on the anticorrosion layer of the pipeline. [0003] my country's polyethylene production capacity is mainly concentrated in Northwest, South China and Northeast China. With the launch of relevant domestic production capacity devices, my country's polyethylene production capacity and output have shown a year-by-year growth trend in recent years. In 2019, my country's apparent consumption of polyet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K13/04C08K7/26C08K3/36C08K5/20C08K5/103
CPCC08L23/06C08L2203/18C08L2207/066C08L2205/025C08K2201/014C08K13/04C08K7/26C08K3/36C08K5/20C08K5/103
Inventor 王立军岳玉娟李诚
Owner ZIBO LINZI ALINDA CHEM CO LTD
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