CN115558197A

CN115558197A - Reinforced polypropylene material and application thereof in sewage pipes

Info

Publication number: CN115558197A
Application number: CN202111606455.4A
Authority: CN
Inventors: 王泽阳; 王伟迟; 徐晓欣
Original assignee: Jiangsu Yongshun New Material Technology Co Ltd
Current assignee: Jiangsu Yongshun New Material Technology Co Ltd
Priority date: 2021-12-26
Filing date: 2021-12-26
Publication date: 2023-01-03

Abstract

The invention relates to a reinforced polypropylene material (IPC (International Industrial Standard): C08L 23/06), in particular to a reinforced polypropylene material and application thereof in a sewage pipeline. The reinforced polypropylene material at least comprises the following raw materials in percentage by weight: 40 to 45 percent of polypropylene, 25 to 30 percent of PE, 4 to 5 percent of POE, 2 to 3 percent of lubricating additive, 1.2 to 1.5 percent of chlorinated polyethylene, 18 to 22 percent of silicon powder and 1.5 to 2.5 percent of additive. When the reinforced polypropylene material prepared by the invention is used for a sewage pipeline, the reinforced polypropylene material has good sealing property and seepage-proofing property, and the dispersibility of silicon powder is improved through the synergistic effect of the lubricating additive and the silicon powder, so that the smoothness and the flatness of the inner wall and the outer wall of the pipeline are improved, the scale deposit on the inner wall of the sewage pipeline is reduced, and the mechanical property of the sewage pipeline is also improved. In addition, the prepared reinforced polypropylene material also has excellent aging resistance and abrasion resistance.

Description

Reinforced polypropylene material and application thereof in sewage pipes

Technical Field

The invention relates to a reinforced polypropylene material (IPC (International patent Classification) No. C08L 23/06), in particular to a reinforced polypropylene material and application thereof in a sewage pipeline.

Background

For a long time, most of domestic sewage pipelines are made of concrete and cast iron, the method has the defects of difficult construction, poor tightness, large liquid flow resistance, easy blockage and the like, and in addition, the sewage pipelines made of the concrete and the cast iron are easy to crack due to the rigid structure. Thus causing corrosion to the cast iron and shortening the service life. With the continuous development of science and technology, large-caliber plastic holes gradually replace concrete pipelines and cast iron pipelines. In a large-scale urbanization process, the plastic for the sewage pipeline with low cost and good comprehensive performance is very urgent.

The reinforced composite plastic special for the large-caliber sewage pipeline, prepared by the patent application CN201910828602.9, has strength and ring stiffness, but in the preparation process, the raw material formula is too complex, a large amount of auxiliary agents are used, and the reinforced composite plastic is not friendly to the environment. Patent application CN201110145320.2 has prepared a glass fiber reinforced PE combined material, has solved the problem that the pipeline meets the crooked flexible of hot water, however, because the prescription is too simple to relatively be relatively poor in the aspect of mechanical properties.

Therefore, the reinforced polypropylene material provided by the invention is used for sewage pipelines, has good sealing property and seepage-proofing property, and improves the dispersibility of silicon powder through the synergistic effect of the lubricating additive and the silicon powder, so that the smoothness and the flatness of the inner wall and the outer wall of the pipeline are improved. The mechanical property of the sewage pipeline is improved while the scale on the inner wall of the sewage pipeline is reduced. In addition, the prepared reinforced polypropylene material also has excellent ageing resistance and abrasion resistance.

Disclosure of Invention

In order to solve the above problems, a first aspect of the present invention provides a reinforced polypropylene material, comprising at least, by weight: 40 to 45 percent of polypropylene, 25 to 30 percent of PE, 4 to 5 percent of POE, 2 to 3 percent of lubricating additive, 1.2 to 1.5 percent of chlorinated polyethylene, 18 to 22 percent of silicon powder and 1.5 to 2.5 percent of additive.

Preferably, the polypropylene is commercially available, for example, reinforced polypropylene produced by Shantou ChuangTech technologies, inc.

Preferably, the PE is a mixture of low density PE and high density PE. The low-density PE is 1810D in trademark; the high-density PE is TR-570; the low-density PE and the high-density PE are both purchased from petrochemical company Limited in China.

Further preferably, the weight ratio of the low-density PE to the high-density PE is 2.

According to the invention, the wear resistance and ageing resistance of the reinforced polypropylene material are improved by limiting the weight ratio of the low-density PE to the high-density PE, and particularly when the weight ratio of the low-density PE to the high-density PE is 2. The applicant speculates that: the low-density PE provides good flow property for the reinforced polypropylene material by virtue of the characteristics of the chain segment of the low-density PE, and the high-density PE provides good strength property for the whole reinforced polypropylene material, so that the melt index of the whole reinforced polypropylene material is increased by the synergistic effect of the low-density PE and the high-density PE, and the processability of the reinforced polypropylene material is ensured. Meanwhile, the excellent physical and mechanical properties of the reinforced polypropylene material are ensured.

Preferably, the POE is a polyethylene octene co-elastomer; the polyethylene octene co-elastomer is 6202 produced by exxon mobil.

Preferably, the weight ratio of the polypropylene, the PE and the POE is 10: (6-7): 1.

when the reinforced polypropylene material formed by polypropylene, PE and POE is contacted with oil, swelling is not easy to generate, so that the oil-resistant performance is good. In addition, the content of POE influences the toughening effect of polypropylene and PE, and the reinforced polypropylene material can also play a role in dispersing and buffering impact energy when being impacted, thereby improving the impact strength of the system. When the addition amount of the POE is too much, the mechanical property of the sewage pipeline is affected.

Preferably, the lubricating aid is a mixture of stearic acid and paraffin wax.

Further preferably, the stearic acid is commercially available, for example, indonesia 1801 sold by Jinan specialization Industrial science, inc.; the paraffin wax is commercially available, for example, paraffin wax 58# sold by Xiangmao International trade, inc.

Further preferably, the weight ratio of stearic acid to paraffin wax is 2.

According to the invention, by limiting the weight ratio of stearic acid to paraffin, the processing flowability of the reinforced polypropylene material is improved, and the smoothness and the flatness of the inside and the outside of the sewage pipeline are also improved. However, the applicant found that excessive use of paraffin and stearic acid causes the reinforced polypropylene material to be soft and have reduced rigidity. Resulting in a reduction in the mechanical properties of the reinforced polypropylene material.

Preferably, the chlorinated polyethylene is one or more of CPE-130A, CPE-135B and CPE-140B.

Further preferably, the chlorinated polyethylene is CPE-135A; the CPE-135A was purchased from Hongfu New materials, inc., dongguan.

Preferably, the average particle size of the silicon powder is 1000-1400 meshes.

Further preferably, the average particle size of the silicon powder is 1200 meshes, and the silicon powder is purchased from Jiangsu Yongshun New Material science and technology Limited.

More than 90% of the silicon powder used in the application is SiO with high activity ₂ The corrosion resistance and wear resistance of the reinforced polypropylene material are greatly enhanced, especially when the average particle size of the silicon powder is 1200 meshes. The applicant speculates that: at 1200 meshes, the silicon powder has proper particle size, so that the porosity of the reinforced polypropylene material is obviously reduced, the compactness of the reinforced polypropylene material is improved, and the silicon powder, the polypropylene and the PE have good compatibility. However, when the average particle size of the silicon powder is too small, agglomeration, dispersion unevenness, and the like are likely to occur due to van der waals force and electrostatic force during the preparation process, thereby causing problems such as brittleness, cracking, and the like of the reinforced polypropylene material.

Preferably, the weight ratio of the lubricating assistant to the silicon powder is (0.1-0.15): 1.

In the invention, when the weight ratio of the lubricating additive to the silicon powder is (0.1-0.15): 1, the toughness and the strength of the sewage pipeline are effectively improved. The applicant speculates that: in the preparation process of the reinforced polypropylene material, the lubricating additive is firstly melted with PE and wraps the surface of the filler, and has good compatibility with silicon powder, so that the lubricating additive can permeate into the inner gap of the silicon powder aggregate to weaken cohesive force, and the silicon powder aggregate is easier to open under the action of external shearing force.

Preferably, the auxiliary agent is a mixture of magnesium oxide and ceramic micro powder, and the weight ratio of the magnesium oxide to the ceramic micro powder is 1:1.

the sewage pipeline has DN800 mm, wall thickness of 4.9mm and length of 6-10 m, is a novel plastic buried sewage pipeline, and better meets the requirements of sealing reliability and connection construction.

Has the advantages that:

1. this application is through injecing the weight ratio of stearic acid and paraffin, when improving reinforcing polypropylene materials working property effectively, has also improved the smoothness and the roughness of sewage conduit inside and outside.

2. By selecting the specific silicon powder, the problem that the rigidity of the reinforced polypropylene material is possibly reduced due to the addition of the lubricating additive is solved, and the impermeability, corrosion resistance and wear resistance of the reinforced polypropylene material are improved.

3. By limiting the weight ratio of the lubricating additive to the silicon powder, the dispersibility of the silicon powder is effectively improved, and the mechanical property of the reinforced polypropylene material is improved.

4. The weight ratio of the low-density PE to the high-density PE is limited, so that the strength of the whole reinforced polypropylene material is improved, and the good flowing property is provided, the whole melt index is increased, and the processability of the reinforced polypropylene material is better.

5. This application has improved the impact strength of system, elongation at break and resistant oily performance through injecing the weight ratio of polypropylene, PE and POE.

Drawings

Fig. 1 is a schematic view of the structure of a sewage pipe in the present application.

Detailed Description

Examples

Example 1

The embodiment 1 of the invention provides a reinforced polypropylene material, which comprises the following raw materials in percentage by weight: 42% of polypropylene, 28% of PE, 4.3% of POE, 2.3% of lubricating additive, 1.4% of chlorinated polyethylene, 20% of silicon powder and 2% of additive. The POE is 6202 produced by exxonmobil. The lubricating assistant is a mixture of stearic acid and paraffin. The chlorinated polyethylene is CPE-135A. The auxiliary agent is a mixture of magnesium oxide and ceramic micro powder.

The polypropylene in this example was purchased from reinforced polypropylene produced by the Shantou Chuangte technologies Co.

PE in the embodiment is a mixture of 1810D and TR-570; both the 1810D and TR-570 were purchased from petrochemical corporation, china.

In this example, the weight ratio of PE 1810D to TR-570 is 2:1.

stearic acid in this example was purchased from Indonesia 1801 sold by Jinan specialization engineering technologies, inc.

The paraffin wax in this example was purchased from 58# sold by Heng Mao International trade, inc.

The weight ratio of stearic acid to paraffin in this example was 2:1.

CPE-135A in this example was purchased from Hongfu New materials, inc. of Dongguan.

The silicon powder in the embodiment is purchased from Jiangsu Yongshun New Material science and technology Co.

The weight ratio of the magnesium oxide to the ceramic micro powder in the embodiment is 1:1.

the magnesium oxide in this example was purchased from a company, lianghong Henhai magnesium, inc.

The ceramic micro powder in the embodiment is purchased from Shanghai Huizhi sub-nanometer new material Co.

The preparation method of the reinforced polypropylene material in the embodiment comprises the following steps:

(1) Placing polypropylene, PE, POE, a lubricating additive, chlorinated polyethylene, silicon powder, magnesium oxide and ceramic micro powder in a blender, and uniformly mixing.

(2) Introducing the uniformly mixed raw materials into a hopper of an extruding machine, heating for melting, and granulating.

(3) Placing the raw material particles in a hydraulic press die, and performing extrusion forming after melting to obtain the material;

example 2

Example 2 is the same as example 1 except that in example 2, the weight ratio of polypropylene is 45% and the weight ratio of PE is 25%.

Example 3

Example 3 is the same as example 1; except that in example 3, the amount of the lubricating aid was 2% and the amount of the silica powder was 20.3%.

Comparative example 1

Comparative example 1 the embodiment of comparative example 1 is the same as example 1; except that the average particle diameter of the silicon powder in comparative example 1 was 600 mesh.

Comparative example 2

Comparative example 2 is the same as example 1; except that in comparative example 2, the weight ratio of 1810D to TR-570 was 1.

Comparative example 3

Comparative example 3 is the same as example 1; except that in comparative example 3 the weight ratio of stearic acid to paraffin wax was 1:1.

performance test data:

in the performance tests of examples 1-3 and comparative examples 1-3, the test samples were injection molded bars, the injection molding temperature was 200 ℃, the material drying temperature was 90 ℃, and the test time was 3 hours.

Table 1 shows the results of the performance tests of the reinforced polypropylene material prepared in example 1.

TABLE 1

Table 2 shows the performance test of the reinforced polypropylene materials prepared in examples 1 to 3 and comparative examples 1 to 3

TABLE 2

Claims

1. The reinforced polypropylene material is characterized by comprising the following raw materials in percentage by weight: 40 to 45 percent of polypropylene, 25 to 30 percent of PE, 4 to 5 percent of POE, 2 to 3 percent of lubricating additive, 1.2 to 1.5 percent of chlorinated polyethylene, 18 to 22 percent of silicon powder and 1.5 to 2.5 percent of additive.

2. The reinforced polypropylene material of claim 1, wherein the PE is a blend of low density PE and high density PE.

3. The reinforced polypropylene material of claim 1, wherein the weight ratio of polypropylene, PE and POE is 10: (6-7): 1.

4. the reinforced polypropylene material of claim 1, wherein the lubricating additive is a mixture of stearic acid and paraffin wax.

5. The reinforced polypropylene material of claim 1, wherein the chlorinated polyethylene is one or more of CPE-130A, CPE-135B, CPE-140B.

6. The reinforced polypropylene material of claim 1, wherein the chlorinated polyethylene is CPE-130A.

7. The reinforced polypropylene material according to any one of claims 1 to 6, wherein the silicon powder has an average particle size of 1000 to 1400 mesh.

8. The reinforced polypropylene material according to any one of claims 1 to 7, wherein the weight ratio (0.1 to 0.15) of the lubricating additive to the silicon powder is 1.

9. The reinforced polypropylene material of claim 1, wherein the aid is a mixture of magnesium oxide and ceramic micropowder; the weight ratio of the magnesium oxide to the ceramic micro powder is 1:1.

10. use of the reinforced polypropylene material according to any one of claims 1 to 9 in sewage pipes.