PE-100 grade fuel gas pipeline orange premix and preparation method thereof

Abstract

The invention discloses a PE-100 grade fuel gas pipeline orange premix and a preparation method thereof, and the premix is prepared from the following raw materials in parts by weight: 100 parts of bimodal high density polyethylene resin, 2 parts of color master batch and 0.2-0.3 part of antioxidant, the color master batch is prepared from the following raw materials in parts by weight: 100 parts of bimodal high-density polyethylene resin, 4.3-14 parts of toner, 13-26 parts of an anti-ultraviolet aid and 0.2-0.3 part of an antioxidant. By screening the bimodal high-density polyethylene resin and adding a proper amount of the toner, the anti-ultraviolet aid and the antioxidant, the problem that no domestic PE-100-grade orange gas pipeline material exists in China is successfully solved, the obtained premix completely meets the performance requirements of the latest national standard GB15558.1 / 2 / 3 / 4 / 5-2023, and a powerful guarantee is provided for safe use of gas pipelines.

Description

Technical Field

[0001] The invention relates to the technical field of PE pipes, and in particular to a PE-100 grade gas pipeline orange premix and a preparation method thereof. Background Art

[0002] Entering the 21st century, China began to vigorously implement the energy structure adjustment plan, make full use of natural gas resources, and plan to significantly increase the proportion of natural gas in energy consumption, especially most of the urban energy will be converted to natural gas. This shift has promoted the construction of natural gas pipelines, and the demand for plastic gas pipeline raw materials has continued to grow. However, in terms of orange premixes for gas pipelines, domestic research and production is still blank, and mainly relies on imported materials. Therefore, the development of a PE-100 grade gas pipeline orange premix that meets the requirements of the latest national standard GB15558.1 / 2 / 3 / 4 / 5-2023 has become an urgent problem to be solved in the industry. Summary of the invention

[0003] The purpose of the present invention is to meet the requirements of industry standards and market development needs, and provide a PE-100 grade gas pipeline orange premix and a preparation method thereof. By screening a bimodal high-density polyethylene resin and adding an appropriate amount of color powder, anti-ultraviolet additive and antioxidant, the problem of no domestically produced PE-100 grade orange gas pipeline material in China is successfully solved.

[0004] The present invention adopts the following technical solution:

[0005] A PE-100 grade gas pipeline orange premix is ​​prepared from the following raw materials in parts by weight:

[0006] 100 parts of bimodal high density polyethylene resin;

[0007] 2 parts of masterbatch;

[0008] Antioxidant 0.2-0.3 parts;

[0009] Wherein, the masterbatch is prepared from the following raw materials in parts by weight:

[0010]

[0011] The color powder is one or a combination of benzimidazolone pigment, chromium / antimony / titanium oxide (Ti-Sb-Cr-O), and rutile titanium dioxide.

[0012] The anti-ultraviolet auxiliary agent is a combination of one or two of 2-hydroxy-4-n-octyloxybenzophenone and poly-{[6-[(1,1,3,3-tetramethylbutyl)-imino]-1,3,5-triazine-2,4-diyl][2-(2,2,6,6-tetramethylpiperidinyl)-amino]-hexylene-[4-(2,2,6,6-tetramethylpiperidinyl)-imino]}.

[0013] The antioxidant is one or a combination of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, dilauryl thiodipropionate, and 4,4'-thiobis(6-tert-butyl-3-methylphenol).

[0014] A method for preparing an orange premix for a PE-100 grade gas pipeline includes preparing a masterbatch and preparing the premix, wherein the preparation of the masterbatch includes the following steps:

[0015] S1-1, weigh various raw materials according to the formula and set aside;

[0016] S1-2, drying the granular or powdered bimodal high-density polyethylene resin to control the moisture content below 0.3%, then adding color powder, anti-ultraviolet additive and antioxidant and mixing them evenly, extruding and granulating them through a twin-screw extruder, removing surface water from the obtained pellets through cyclone separation and drying them at 90° C. for 4 hours, and then storing them in a vacuum packaging bag to obtain masterbatch pellets;

[0017] The preparation of the premix comprises the following steps:

[0018] S2-1. Weigh various raw materials according to the formula and set aside;

[0019] S2-2, drying the granular or powdered bimodal high-density polyethylene resin to control the moisture content below 0.3%, then adding the masterbatch and antioxidant prepared in step S1-1 and mixing them evenly in proportion, extruding and granulating them through a twin-screw extruder, separating the obtained pellets by cyclone to remove surface water, drying them at 90°C for 4 hours, and storing them in a vacuum packaging bag to obtain a premix.

[0020] In the step S1-2, the vacuum pressure of the vacuum packaging bag is above 0.07 MPa, the extrusion temperature of the twin-screw extruder is 200° C.-240° C., and the extrusion speed is 20-60 rpm.

[0021] In the step S2-2, the vacuum pressure of the vacuum packaging bag is above 0.07 MPa, the extrusion temperature of the twin-screw extruder is 200° C.-240° C., and the extrusion speed is 20-60 rpm.

[0022] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0023] A. The present invention successfully solves the problem that there is no domestic PE-100 grade orange gas pipeline material in China by screening bimodal high-density polyethylene resin and adding appropriate amounts of color powder, anti-ultraviolet additives and antioxidants. The obtained premix fully meets the performance requirements of the latest national standard GB15558.1 / 2 / 3 / 4 / 5-2023, providing a strong guarantee for the safe use of gas pipelines.

[0024] B. Since polyethylene pipes have good resistance to rapid crack transmission, the gas pipeline made using the premix of the present invention will have higher safety and can meet the strict requirements on the quality of gas pipes.

[0025] C. The present invention will break the monopoly of foreign gas pipeline orange materials, promote the development of domestic related industries, reduce production costs, and improve market competitiveness. In addition, the premix of the present invention uses domestic raw materials, meets the requirements of environmental protection and sustainable development, and helps promote the development of green energy and environmental protection industries. DETAILED DESCRIPTION

[0026] The present invention can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Instead, these embodiments are provided so that the present disclosure will be thorough and complete and will fully convey the concept of the present invention to those skilled in the art. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] This embodiment 1 provides a PE-100 grade gas pipeline orange premix, and the weight proportions of the components are shown in the following table:

[0029]

[0030] The preparation method is as follows:

[0031] The preparation method of the PE-100 grade gas pipeline orange premix includes the preparation of a masterbatch and the preparation of the premix, wherein the preparation of the masterbatch includes the following steps:

[0032] S1-1, weigh various raw materials according to the formula and set aside;

[0033] S1-2, drying the bimodal high-density polyethylene resin particles / powder to control the moisture content below 0.3%, then adding color powder, anti-ultraviolet additives and antioxidants and mixing them evenly, extruding and granulating them through a twin-screw extruder, and removing surface water from the obtained pellets through cyclone separation and drying them at 90°C for 4 hours, and then storing them in a vacuum packaging bag to obtain masterbatch particles; in this step, the vacuum pressure of the vacuum packaging bag is above 0.07MPa, the extrusion temperature of the twin-screw extruder is 200°C-240°C, and the extrusion speed is 20-60rpm.

[0034] The preparation of the premix comprises the following steps:

[0035] S2-1. Weigh various raw materials according to the formula and set aside;

[0036] S2-2, drying the bimodal high-density polyethylene resin particles / powder to control the moisture content below 0.3%, then adding the masterbatch particles and antioxidant prepared in step S1-1 and mixing them evenly in proportion, extruding and granulating the particles through a twin-screw extruder, separating the particles to remove surface water through a cyclone, drying the particles at 90°C for 4 hours, and storing them in a vacuum packaging bag to obtain a premix; in this step, the vacuum pressure of the vacuum packaging bag is above 0.07MPa, the extrusion temperature of the twin-screw extruder is 200°C-240°C, and the extrusion speed is 20-60rpm.

[0037] Example 2

[0038] This embodiment 2 provides a PE-100 grade gas pipeline orange premix, and the weight proportions of the components are shown in the following table:

[0039]

[0040] The preparation method of this embodiment is the same as that of embodiment 1.

[0041] Example 3

[0042] This embodiment 3 provides a PE-100 grade gas pipeline orange premix, and the weight proportions of each component are shown in the following table:

[0043]

[0044] The preparation method of this embodiment is the same as that of embodiment 1.

[0045] Example 4

[0046] This embodiment 4 provides a PE-100 grade gas pipeline orange premix, and the weight proportions of the components are shown in the following table:

[0047]

[0048]

[0049] The preparation method of this embodiment is the same as that of embodiment 1.

[0050] Comparative Example

[0051] This comparative example uses a commercially available orange pipe material made from imported PE-100 resin products.

[0052] The pipe materials made of the materials in Examples 1-4 and the comparative example were subjected to performance tests respectively, and the performance data thereof are shown in the performance test results in Table 1.

[0053] Table 1 Performance test results of products

[0054]

[0055]

[0056] It can be seen from the performance test data in Table 1 that the various properties of the premixes obtained in Examples 1-4 meet the requirements of GB15558, and are close to the various performance indicators of the imported products provided in the comparative examples, and can be safely used in gas pipelines. In addition, there are large differences in the key melt index indicators of Examples 1-4, which are mainly caused by the preparation process and the use of different additives. Due to the requirements of actual production equipment, the melt index requirements of the material by the pipeline manufacturer may be different. These four embodiments can provide references for pipe making processes that meet different melt index requirements.

[0057] This application uses domestic high-density polyethylene resin as the main resin for the first time (the orange pipe materials on the market are currently made of foreign resin products), and by selecting pigments and fillers, the volatile content is reduced. The volatile content has an impact on the durability of the pipe. The lower the content, the better the durability of the pipe. As can be seen from Table 1, the volatile content of the premixes obtained in Examples 1-4 is lower than that in the comparative example, indicating that the premixes provided in Examples 1-4 of this application are superior to imported materials in terms of durability.

[0058] The present invention successfully solves the problem that there is no domestic PE-100 grade orange gas pipeline material in China by screening bimodal high-density polyethylene resin and adding appropriate amounts of color powder, anti-ultraviolet additives and antioxidants. The obtained premix fully meets the performance requirements of the latest national standard GB15558.1 / 2 / 3 / 4 / 5-2023, providing a strong guarantee for the safe use of gas pipelines.

[0059] Since polyethylene pipes have good resistance to rapid crack propagation, the gas pipeline made using the premix of the present invention will have higher safety and can meet the strict requirements on the quality of the gas pipe.

[0060] The present invention will break the monopoly of foreign gas pipeline orange materials, promote the development of domestic related industries, reduce production costs, and improve market competitiveness. In addition, the premix of the present invention uses domestic raw materials, meets the requirements of environmental protection and sustainable development, and helps promote the development of green energy and environmental protection industries.

[0061] Anything not described in the present invention is applicable to the prior art.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A PE-100 grade gas pipeline orange premix, characterized in that: It is prepared from the following raw materials in parts by weight: 100 parts of bimodal high density polyethylene resin; 2 parts of masterbatch; Antioxidant 0.2-0.3 parts; Wherein, the masterbatch is prepared from the following raw materials in parts by weight:

2. The PE-100 grade gas pipeline orange premix according to claim 1, characterized in that: The color powder is one or a combination of benzimidazolone pigment, chromium / antimony / titanium oxide (Ti-Sb-Cr-O), and rutile titanium dioxide.

3. The PE-100 grade gas pipeline orange premix according to claim 1, characterized in that: The anti-ultraviolet auxiliary agent is a combination of one or two of 2-hydroxy-4-n-octyloxybenzophenone and poly-{[6-[(1,1,3,3-tetramethylbutyl)-imino]-1,3,5-triazine-2,4-diyl][2-(2,2,6,6-tetramethylpiperidinyl)-amino]-hexylene-[4-(2,2,6,6-tetramethylpiperidinyl)-imino]}.

4. The PE-100 grade gas pipeline orange premix according to claim 1, characterized in that: The antioxidant is one or a combination of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, dilauryl thiodipropionate, and 4,4'-thiobis(6-tert-butyl-3-methylphenol).

5. A method for preparing a PE-100 grade gas pipeline orange premix, characterized in that: The method comprises the preparation of a masterbatch and a premix, wherein the preparation of the masterbatch comprises the following steps: S1-1, weigh various raw materials according to the formula and set aside; S1-2, drying the granular or powdered bimodal high-density polyethylene resin to control the moisture content below 0.3%, then adding color powder, anti-ultraviolet additive and antioxidant and mixing them evenly, extruding and granulating them through a twin-screw extruder, removing surface water from the obtained pellets through cyclone separation and drying them at 90° C. for 4 hours, and then storing them in a vacuum packaging bag to obtain masterbatch pellets; The preparation of the premix comprises the following steps: S2-1. Weigh various raw materials according to the formula and set aside; S2-2, drying the granular or powdered bimodal high-density polyethylene resin to control the moisture content below 0.3%, then adding the masterbatch and antioxidant prepared in step S1-1 and mixing them evenly in proportion, extruding and granulating them through a twin-screw extruder, separating the obtained pellets by cyclone to remove surface water, drying them at 90°C for 4 hours, and storing them in a vacuum packaging bag to obtain a premix.

6. The preparation method according to claim 5, characterized in that: In the step S1-2, the vacuum pressure of the vacuum packaging bag is above 0.07 MPa, the extrusion temperature of the twin-screw extruder is 200° C.-240° C., and the extrusion speed is 20-60 rpm.

7. The preparation method according to claim 5, characterized in that: In the step S2-2, the vacuum pressure of the vacuum packaging bag is above 0.07 MPa, the extrusion temperature of the twin-screw extruder is 200° C.-240° C., and the extrusion speed is 20-60 rpm.

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