阅读说明：本技术 一种改性pvc通信管及其制备方法 (Modified PVC communication pipe and preparation method thereof ) 是由 章振华 陈毅明 裘杨燕 孙东华 王进 陈建 汤成群 于 2020-06-10 设计创作，主要内容包括：本发明涉及PVC通信管技术领域,尤其涉及一种改性PVC通信管及其制备方法,所述改性PVC通信管包括以下重量份的原料：PVC树脂60-80份、CM粉末10-20份、改性填料10-30份、热稳定剂3-5份、分散剂4-6份、润滑剂1-3份、硅烷偶联剂3.5-5.5份、增塑剂2-4份、抗氧化剂1-3份,制得的PVC通信管具有较高的耐候性、耐老化性、阻燃性、韧性和电磁屏蔽性。(The invention relates to the technical field of PVC communication pipes, in particular to a modified PVC communication pipe and a preparation method thereof, wherein the modified PVC communication pipe comprises the following raw materials in parts by weight: 60-80 parts of PVC resin, 10-20 parts of CM powder, 10-30 parts of modified filler, 3-5 parts of heat stabilizer, 4-6 parts of dispersant, 1-3 parts of lubricant, 3.5-5.5 parts of silane coupling agent, 2-4 parts of plasticizer and 1-3 parts of antioxidant, and the prepared PVC communication pipe has high weather resistance, aging resistance, flame retardance, toughness and electromagnetic shielding property.)

1. The modified PVC communication pipe is characterized by comprising the following raw materials in parts by weight: 60-80 parts of PVC resin, 10-20 parts of CM powder, 10-30 parts of modified filler, 3-5 parts of heat stabilizer, 4-6 parts of dispersant, 1-3 parts of lubricant, 3.5-5.5 parts of silane coupling agent, 2-4 parts of plasticizer and 1-3 parts of antioxidant.

2. The modified PVC communication pipe of claim 1, which comprises the following raw materials in parts by weight: 70 parts of PVC resin, 15 parts of CM powder, 20 parts of modified filler, 4 parts of heat stabilizer, 5 parts of dispersant, 2 parts of lubricant, 4.5 parts of silane coupling agent, 3 parts of plasticizer and 2 parts of antioxidant.

3. The modified PVC communication tube of claim 2, wherein the heat stabilizer is lead salt stabilizer, the lubricant is polyethylene wax, the plasticizer is dioctyl phthalate, and the antioxidant is a mixture of pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and tris [2, 4-di-tert-butylphenyl ] phosphite.

4. A modified PVC communication tube as claimed in claim 3, wherein the dispersing agent is at least one of triethylhexylphosphoric acid, sodium dodecylsulfate, methylpentanol, cellulose derivative, polyacrylamide.

5. The method for preparing a modified PVC communication tube according to claim 4, wherein the method comprises the following steps:

putting PVC resin and CM powder into a high-speed mixer, stirring for 10-20min at 80-90 ℃, adding a heat stabilizer, a dispersing agent, a lubricating agent, a silane coupling agent, a modified filler and an antioxidant, stirring for 10-30min at 160 ℃ under 140-.

6. The method for preparing a modified PVC communication pipe according to claim 5, wherein the preparation of the modified filler comprises the following steps:

modified manganese-copper alloy: grinding the manganese-copper alloy into powder, adding deionized water, stirring to form a suspension, adding ethylene diamine tetraacetic acid, adding alkyl glucoside, continuously stirring for 5-8H at 80-100 ℃, keeping the temperature for 8-12H, cooling, filtering and drying to obtain the modified manganese-copper alloy;

modified carbon black: adding conductive carbon black into deionized water, stirring to obtain a suspension, adding sodium stearate, adding sodium sulfate, continuously stirring for 1-3H at the temperature of 30-45 ℃, filtering after the reaction is finished, and drying to obtain modified carbon black;

modified filler: adding the modified manganese-copper alloy into deionized water, stirring to obtain a suspension, adding modified carbon black, adding tetra-n-propyl zirconate, adding sodium carbonate, stirring for 1-2H, carrying out ultrasonic oscillation for 3-5H at 50-60 ℃, carrying out heat preservation for 5-8H at 80-90 ℃, adding titanium dioxide powder, boric acid solution and sodium citrate, stirring uniformly, carrying out water bath heating for 2-3H at 100-120 ℃, cooling, washing, filtering and drying to obtain the modified filler.

7. The method for preparing the modified PVC communication tube as claimed in claim 6, wherein the manganese-copper alloy is subjected to a jet milling method to obtain ultrafine manganese-copper alloy powder.

8. The method for preparing a modified PVC communication tube according to claim 7, wherein in the step of preparing the modified manganin alloy, the drying condition is 120 ℃ and the drying is 1-2H.

9. The method of claim 8, wherein the modified carbon black is dried at 100 ℃ for 3-5H.

10. The modified PVC communication pipe and the method for preparing the same according to claim 9, wherein the modified filler is prepared by the step of preparing the modified filler, wherein the ultrasonic oscillation frequency is 5 to 12 Khz.

Technical Field

The invention relates to the technical field of PVC communication pipes, in particular to a modified PVC communication pipe and a preparation method thereof.

Background

With the rapid development of communication industry, the number of communication optical cables and electric cables buried underground is increasing. For a long time, the communication pipe is mainly made of a cement pipe at the earliest, and has the advantages of low manufacturing cost and mature process; the PVC pipe has the defects of long construction period, complex construction process, high maintenance cost, easy settlement and the like, and is gradually replaced by a plastic pipe in recent years, the PVC pipe is one of the most common pipes except PE pipes, and the PVC pipe is applied to a plurality of fields, namely one of communication fields, by virtue of the characteristics of light self weight, corrosion resistance, high compressive strength, safety, convenience, long service life and the like.

The PVC pipe is mainly made of polyvinyl chloride, and is added with other components to enhance the heat resistance, toughness, ductility and the like of the PVC pipe.

The invention discloses a wear-resistant glass fiber communication pipe and a preparation method thereof with a Chinese patent application number of 'CN201610527821.X', wherein the wear-resistant glass fiber communication pipe comprises the following raw materials in parts by weight: PVC60-90 parts, calcium carbonate 6-13.5 parts, glass fiber 3-22.5 parts, impact modifier 1.8-13.5 parts, stearic acid 0.3-0.8 part, calcium zinc composite stabilizer 3.5-6 parts, PE wax 0.4-0.4 part, the invention strictly improves the conditions of temperature, feeding speed, host rotating speed, traction speed and the like in the preparation process, solves the problems of poor plasticization of glass fiber rigid communication tube sample bars, insufficient sample bar forming and the like in the production process, obtains the wear-resistant glass fiber communication tube with proper rigidity strength and toughness strength, but when the communication tube is used in a place where communication cables are concentrated, the communication cable has large information amount processed, the emitted electromagnetic radiation is strong, the electromagnetic interference is easy to cause, the information interference and delay are easy to cause, and certain trouble is brought to workers.

Disclosure of Invention

In view of the above, the present invention aims to provide a modified PVC communication pipe and a preparation method thereof, and the prepared PVC communication pipe has high weather resistance, aging resistance, flame retardancy, toughness and electromagnetic shielding property.

The invention solves the technical problems by the following technical means:

the modified PVC communication pipe is characterized by comprising the following raw materials in parts by weight: 60-80 parts of PVC resin, 10-20 parts of CM powder, 10-30 parts of modified filler, 3-5 parts of heat stabilizer, 4-6 parts of dispersant, 1-3 parts of lubricant, 3.5-5.5 parts of silane coupling agent, 2-4 parts of plasticizer and 1-3 parts of antioxidant.

Further, the modified PVC communication pipe comprises the following raw materials in parts by weight: 70 parts of PVC resin, 15 parts of CM powder, 20 parts of modified filler, 4 parts of heat stabilizer, 5 parts of dispersant, 2 parts of lubricant, 4.5 parts of silane coupling agent, 3 parts of plasticizer and 2 parts of antioxidant.

Further, the heat stabilizer is a lead salt stabilizer, the lubricant is polyethylene wax, the plasticizer is dioctyl phthalate, and the antioxidant is a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester and tris [2, 4-di-tert-butylphenyl ] phosphite.

Further, the dispersant is at least one of triethylhexyl phosphoric acid, sodium dodecyl sulfate, methylpentanol, cellulose derivative and polyacrylamide.

Further, the preparation method of the modified PVC communication pipe comprises the following steps:

putting PVC resin and CM powder into a high-speed mixer, stirring for 10-20min at 80-90 ℃, adding a heat stabilizer, a dispersing agent, a lubricating agent, a silane coupling agent, a modified filler and an antioxidant, stirring for 10-3min at 160 ℃ of 140-.

Further, the preparation of the modified filler comprises the following steps:

modified manganese-copper alloy: grinding the manganese-copper alloy into powder, adding deionized water, stirring to form a suspension, adding ethylene diamine tetraacetic acid, adding alkyl glucoside, continuously stirring for 5-8H at 80-100 ℃, keeping the temperature for 8-12H, cooling, filtering and drying to obtain the modified manganese-copper alloy;

modified carbon black: adding conductive carbon black into deionized water, stirring to obtain a suspension, adding sodium stearate, adding sodium sulfate, continuously stirring for 1-3H at the temperature of 30-45 ℃, filtering after the reaction is finished, and drying to obtain modified carbon black;

modified filler: adding the modified manganese-copper alloy into deionized water, stirring to obtain a suspension, adding modified carbon black, adding tetra-n-propyl zirconate, adding sodium carbonate, stirring for 1-2H, carrying out ultrasonic oscillation for 3-5H at 50-60 ℃, carrying out heat preservation for 5-8H at 80-90 ℃, adding titanium dioxide powder, boric acid solution and sodium citrate, stirring uniformly, carrying out water bath heating for 2-3H at 100-120 ℃, cooling, washing, filtering and drying to obtain the modified filler.

Adding tetra-n-propyl zirconate and sodium carbonate into a mixed solution to load modified carbon black on the modified manganese-copper alloy to prepare an intermediate, adding base titanium dioxide into the intermediate solution, and chemically depositing the intermediate on the titanium dioxide by using sodium citrate as a complexing agent in an acidic environment to prepare the modified filler.

The modified filler takes titanium dioxide as a base layer, the compound of the intermediate modified manganese-copper alloy and the modified carbon black is deposited on the surface of the titanium dioxide by a chemical deposition method, the titanium dioxide has large specific surface area and good thermal stability, the surface of the titanium dioxide can be loaded with more compounds of the modified manganese-copper alloy and the modified carbon black, the inner layer of the compound of the modified manganese-copper alloy and the modified carbon black is the manganese-copper alloy, the outer layer is the conductive carbon black, the manganese-copper alloy has lower resistivity and higher magnetic conductivity, the eddy current effect can be increased, the electromagnetic wave emitted in the PVC pipe is intercepted in the pipe, and when the electromagnetic wave migrates on the pipe wall, because of the potential difference between the titanium dioxide and the manganese-copper alloy, the kinetic energy of the electromagnetic wave is reduced, and the specific surface area of the modified filler is increased by the base layer, so that the migration path is lengthened, and the electromagnetic wave reflected back into the tube is weakened; the conductive carbon black has high conductivity and can reflect the electromagnetic wave radiated from the outside, and when the external electromagnetic wave reaches the pipe wall, the reflection of the conductive carbon black, the eddy effect of the manganese-copper alloy and the influence of the base layer on the reflection path of the electromagnetic wave lead to that the energy of the electron is weakened in the reflection process, the energy of the electromagnetic wave reflected back to the outside is weakened, the weakening effect is achieved, and the transmission of the electromagnetic wave in the outside is weakened while the external electromagnetic wave is prevented from interfering the electromagnetic signal in the pipe; through manganese-copper alloy modification and conductive carbon black modification, the modified conductive carbon black is loaded on the modified manganese-copper alloy, a synergistic enhancement effect is achieved, so that the conductive carbon black is gathered on the manganese-copper alloy in a large amount, a conductive path of carbon black particles is enhanced, reflection of external electromagnetic waves of the PVC pipe, reflection and eddy current effects inside the PVC pipe are enhanced, and the electromagnetic shielding performance is enhanced.

Further, the manganese-copper alloy is subjected to jet milling to obtain superfine manganese-copper alloy powder.

The jet milling method is that compressed gas is accelerated into supersonic airflow through specially designed nozzle and jetted to the central grinding area of the grinder to drive the materials in the grinding area to collide with each other to grind fine powder, the airflow is expanded and then raised with the material to enter the grading area, the material reaching the required granularity is separated with the turbine classifier, and the rest coarse powder is returned to the grinding area for further grinding until reaching the required granularity and separated out. The manganese-copper alloy powder with proper size is obtained by a jet mill grinding method, so that the manganese-copper alloy powder is suitable for plastic fillers.

Further, in the preparation step of the modified manganese-copper alloy, drying is carried out for 1-2H under the drying condition of 120 ℃.

Further, in the step of preparing the modified carbon black, the modified carbon black is dried for 3-5H under the condition of 100 ℃.

Further, in the step of preparing the modified filler, the ultrasonic oscillation frequency is 5 to 12 Khz.

Through the oscillation of lower ultrasonic frequency, on one hand, the modified conductive carbon black reacts with the modified manganin alloy as much as possible, and on the other hand, the modified conductive carbon black is convenient to react with the modified manganin alloy, and the C-O bond formed by the combination of the modified conductive carbon black and the modified manganin alloy is prevented from being damaged by higher ultrasonic oscillation frequency. The reaction speed and the reaction combination ratio of the modified conductive carbon black and the modified manganese-copper alloy are increased by heating and heat preservation, and finally, the conductive carbon black which is not completely reacted is washed away by washing to obtain the more stable modified filler.

According to the modified PVC communication pipe and the preparation method thereof, the CM powder and the modified filler are added in the preparation method disclosed by the invention, and the CM powder has excellent weather resistance, ozone resistance, chemical medicine resistance and aging resistance, and has good oil resistance, flame retardance and coloring performance. The toughness is good (the flexibility still exists at minus 30 ℃), and the high-molecular-weight polyurethane has good compatibility with other high-molecular materials; the modified filler is formed by loading a composite of a manganese-copper alloy and conductive carbon black on a titanium dioxide base layer, the titanium dioxide base layer has large specific surface area and good thermal stability, the manganese-copper alloy has lower resistivity and higher magnetic permeability, the conductive carbon black is characterized by small particle size, large and rough specific surface area, high structure, clean surface (few compounds) and high conductivity, the manganese-copper alloy is loaded with the conductive carbon black, the composite of the manganese-copper alloy and the conductive carbon black loaded on the base layer forms multilayer shielding, the conductive carbon black on the outer layer increases the electromagnetic reflection effect, the manganese-copper alloy on the middle layer increases the eddy current effect, the internal base layer increases the migration path of electrons, weakens the energy of the electrons, and accordingly forms a good shielding effect; meanwhile, the modified filler is composed of inorganic particles, so that the wear resistance, aging resistance and weather resistance of the PVC pipe can be improved, and the service life of the pipe is prolonged.

Detailed Description

The present invention will be described in detail with reference to specific examples below: