CN118388879A - Weather-resistant power cable material and preparation method thereof - Google Patents

Abstract

The invention discloses a weather-resistant power cable material and a preparation method thereof, relates to the technical field of cable materials, and is made of the following components: polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer, 2-acrylamide-2-methylpropanesulfonic acid, bis(1-vinyl imidazole-2-) ketone, 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, ethylene acrylic elastomer, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer, environmentally friendly plasticizer, initiator, polyphosphoric acid, phosphorus pentoxide. The weather-resistant power cable material has good flame retardancy, good weather resistance, sufficient mechanical and mechanical properties and performance stability, and long service life.

Description

A weather-resistant power cable material and preparation method thereof

Technical Field

The present invention relates to the technical field of cable materials, and in particular to a weather-resistant power cable material and a preparation method thereof.

Background technique

With the rapid development of my country's economic construction, the demand for electricity has been rising year by year. How to make full use of the existing line corridors and line facilities, transmit as much electricity as possible, reduce line losses, and improve transmission efficiency has become a problem that the power operation department has to consider. Wires and cables are the carriers of power transmission and the basis for ensuring the normal operation of electrical products. They play a role in transmitting electric energy and information. Developing wires and cables with excellent comprehensive performance and performance stability is an effective way to solve the above problems.

Power cable materials are materials used to prepare the insulation and sheath of power cables, and their performance directly affects the service life of power cables. Therefore, seeking power cable materials with better comprehensive performance is a hurdle for researchers in the industry and a necessary path to promote the development of power cables and even the electrical industry. However, the power cable materials in the existing technology are not strong enough, have poor insulation, insufficient anti-electromagnetic interference ability, poor fire retardant performance, and weather resistance needs to be further improved.

In order to solve the above problems, the Chinese invention patent with the authorization announcement number CN115028985B discloses a weather-resistant wire and cable material and its production process. The weather-resistant wire and cable material is calculated by weight and includes: 65-85 parts of modified polyurethane, 13-19 parts of ethylene-vinyl acetate copolymer, 6-10 parts of filler, 8-12 parts of flame retardant, 1-3 parts of cross-linking agent, 1-2 parts of antioxidant, 3-5 parts of lubricant and 0.6-1 parts of ultraviolet absorber; the modified polyurethane is prepared by modifying polyurethane with modified polyetheretherketone microspheres. The invention modifies polyurethane, and the modification process is to add modified polyetheretherketone microspheres. The modified polyetheretherketone microspheres are composed of cobalt tungstate/aluminum nitride composite microspheres coated with polyetheretherketone. The addition of the composite microspheres not only improves the weather resistance of polyurethane, but also enhances the flame retardant effect. However, due to the compatibility issues between the raw materials, the performance stability of the wire and cable material is poor, and the weather resistance still needs to be further improved.

It can be seen that the development of a weather-resistant power cable material with good flame retardancy, good weather resistance, sufficient mechanical properties and performance stability, and long service life and its preparation method meets market demand, has broad market value and application prospects, and is of great significance to promoting the development of the power cable material field.

Summary of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a weather-resistant power cable material having good flame retardancy, good weather resistance, sufficient mechanical properties and performance stability, and long service life, and a preparation method thereof.

To achieve the above object, the technical solution adopted by the present invention is: a weather-resistant power cable material, which is made of the following components by weight: 20-30 parts of polypropylene resin, 8-15 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 40-50 parts of fluorosilicone thermoplastic polyurethane elastomer, 4-6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3-5 parts of bis(1-vinylimidazole-2-)ketone, and 3-(1,1-difluoro- -2-propylene-1-yl)-2(1H)-quinoxalinone 1-3 parts, ethylene acrylic elastomer 8-12 parts, triallyl isocyanurate 3-5 parts, coupling agent 2-4 parts, filler 10-20 parts, antioxidant 0.8-1.2 parts, lubricant 1-1.5 parts, compatibilizer 1-1.5 parts, environmentally friendly plasticizer 1-2 parts, initiator 1-2 parts, polyphosphoric acid 0.3-0.5 parts, phosphorus pentoxide 0.6-1 parts.

Preferably, the initiator is a mixture of dicumyl peroxide, tert-butyl perbenzoate and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:(0.8-1.2):(0.8-1.2).

Preferably, the environmentally friendly plasticizer is epoxidized soybean oil.

Preferably, the compatibilizer is the compatibilizer CMG9801 provided by Jiayirong Polymer (Shanghai) Co., Ltd.

Preferably, the lubricant is at least one of ethylene bisstearamide and butyl stearate.

Preferably, the antioxidant is at least one of antioxidant 1010, antioxidant 168, and antioxidant 1076.

Preferably, the filler is a mixture of white carbon black, carbon black, fly ash, and aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:(1-3):2:(3-5); the particle size of the filler is 1000-1500 mesh.

Preferably, the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

Preferably, the ethylene acrylic acid elastomer is selected from the brand Dupont ^TM G's AEM.

Preferably, there is no special requirement for the source of the fluorosilicone thermoplastic polyurethane elastomer. In one embodiment of the present invention, the fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of Chinese invention patent with authorization publication number CN111154064B.

Preferably, the polypropylene resin is a general-purpose homopolymer polypropylene resin with a grade of T30S produced by Shanghai Petrochemical.

Preferably, the preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethylbiphenyl diisocyanate, and a catalyst to a high boiling point solvent, stirring and reacting at 70-85° C. in an inert gas atmosphere for 3-5 hours, then heating to 88-95° C. and continuing to stir and react for 8-14 hours, then precipitating in water, washing the precipitated polymer with ethanol for 3-6 times, and then rotary evaporating to remove the solvent to obtain a phosphaphenanthryl biphenyl polyurethane functional polymer.

Preferably, the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide, dimethylbiphenyl diisocyanate, catalyst and high boiling point solvent is 1:1:(0.8-1.2):(6-10).

Preferably, the catalyst is at least one of dibutyltin dilaurate and stannous octoate; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is any one of nitrogen, helium, neon and argon.

Another object of the present invention is to provide a method for preparing the weather-resistant power cable material, comprising the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a ratio and mixing them at 65-80° C. for 3-5 minutes, and then adding 2-acrylamido-2-methylpropanesulfonic acid, bis(1-vinylimidazole-2-)ketone, 3-(1,1-difluoro-2-propylene-1-yl) -2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer are mixed at 125-135°C for 8-12 minutes, and then plasticized at 115-130°C for 2-4 minutes to obtain a mixed rubber; initiator, polyphosphoric acid and phosphorus pentoxide are added to the mixed rubber, mixed on an open mill for 3-5 minutes, and the mixture is passed through a thin mill for 3-5 times after being uniformly mixed, and then vulcanized at 175-185°C and dried to obtain the obtained product.

Due to the application of the above technical solution, the present invention has the following beneficial effects:

(1) The method for preparing the weather-resistant power cable material disclosed in the present invention has simple process, convenient operation, low dependence on equipment, high preparation efficiency and finished product qualification rate, low labor intensity, small impact on the environment, is suitable for continuous large-scale production, and has high promotion and application value.

(2) The weather-resistant power cable material disclosed in the present invention is made of the following components in parts by weight: 20-30 parts of polypropylene resin, 8-15 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 40-50 parts of fluorosilicone thermoplastic polyurethane elastomer, 4-6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3-5 parts of bis(1-vinylimidazole-2-)ketone, 1-3 parts of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 8-12 parts of ethylene acrylic elastomer, 3-5 parts of triallyl isocyanurate, 2-4 parts of coupling agent, 10-20 parts of filler, 0.8-1.2 parts of antioxidant, 1-1.5 parts of lubricant, 1-1.5 parts of compatibilizer, 1-2 parts of environmentally friendly plasticizer, 1-2 parts of initiator, 0.3-0.5 parts of polyphosphoric acid, and 0.6-1 parts of phosphorus pentoxide. Through the interaction between the components, the weather-resistant power cable material has good flame retardancy, good weather resistance, sufficient mechanical and mechanical properties and performance stability, and long service life. The polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer and fluorosilicone thermoplastic polyurethane elastomer are blended as the base material, combining the advantages of these materials, so that the product has better flame retardancy, weather resistance, mechanical and mechanical properties and performance stability, and longer service life.

(3) The weather-resistant power cable material disclosed in the present invention introduces phosphaphenanthryl, biphenyl, polyurethane, fluorosilicone, amide, sulfone, fluoroquinoxalone, imidazolone, ethylene acrylic elastomer and isocyanurate structures into the molecular structure of the cable material through the reasonable selection of the types and dosage ratios of each component. Under the multiple effects of electronic effect, steric effect and conjugation effect, these structures make the prepared cable material have good comprehensive performance and performance stability, flame retardancy, weather resistance, mechanical properties and performance stability, and long service life.

(4) The weather-resistant power cable material disclosed in the present invention, the component containing unsaturated olefinic bonds can undergo copolymerization under the action of an initiator, and the sulfonic acid group on the 2-acrylamide-2-methylpropanesulfonic acid can react chemically with the component containing a benzene ring to form an interpenetrating network structure, thereby further improving the flame retardancy, weather resistance, mechanical properties and performance stability of the weather-resistant power cable material. Through the above-mentioned interaction, the compatibility between the components can be improved, thereby improving the compactness of the internal structure, improving the performance stability, and avoiding the phenomenon of exudation caused by compatibility problems during long-term use, thereby effectively extending the service life of the material and ensuring the safety and stability of power transmission.

Detailed ways

The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

Example 1

A weather-resistant power cable material is prepared from the following components in parts by weight: 20 parts of polypropylene resin, 8 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 40 parts of fluorosilicone thermoplastic polyurethane elastomer, 4 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3 parts of bis(1-vinylimidazole-2-)ketone, 1 part of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 8 parts of ethylene acrylic acid elastomer, 3 parts of triallyl isocyanurate, 2 parts of coupling agent, 10 parts of filler, 0.8 parts of antioxidant, 1 part of lubricant, 1 part of compatibilizer, 1 part of environmentally friendly plasticizer, 1 part of initiator, 0.3 parts of polyphosphoric acid and 0.6 parts of phosphorus pentoxide.

The initiator is a mixture of diisopropylbenzene peroxide, tert-butyl perbenzoate, and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:0.8:0.8; the environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is the compatibilizer CMG9801 provided by Jiayirong Polymer (Shanghai) Co., Ltd.; the lubricant is ethylene bisstearamide; the antioxidant is antioxidant 1010; the filler is a mixture of white carbon black, carbon black, fly ash, and aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:1:2:3; the particle size of the filler is 1000 mesh; the coupling agent is a silane coupling agent KH550; the ethylene acrylic elastomer is selected from the brand Dupont ^TM G's AEM.

The fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization announcement number CN111154064B; the polypropylene resin is a general-purpose homopolymer polypropylene resin with a grade of T30S produced by Shanghai Petrochemical.

The preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate and a catalyst to a high boiling point solvent, stirring and reacting at 70°C for 3 hours in an inert gas atmosphere, then heating to 88°C and continuing stirring and reacting for 8 hours, then precipitating in water, washing the precipitated polymer with ethanol for 3 times, and then rotary evaporation to remove the solvent to obtain the phosphaphenanthryl biphenyl polyurethane functional polymer; the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate, catalyst and high boiling point solvent is 1:1:0.8:6; the catalyst is dibutyltin dilaurate; the high boiling point solvent is dimethyl sulfoxide; the inert gas is nitrogen; and the _Mn of the obtained functional polymer is measured by GPC test. =15729 g/mol, M _W /M _n =1.336; through elemental analysis and weight change calculation, the molar ratio of the structural units introduced by 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide and dimethylbiphenyl diisocyanate in the functional polymer is about 1:1, which is the same as the theoretical value.

A preparation method of the weather-resistant power cable material comprises the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a proportion, mixing at 65°C for 3 minutes, then adding 2-acrylamide-2-methylpropanesulfonic acid, bis(1-vinyl imidazole-2-) ketone, 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer, mixing at 125°C for 8 minutes, and then plasticizing at 115°C for 2 minutes to obtain a mixed rubber; adding an initiator, polyphosphoric acid and phosphorus pentoxide to the mixed rubber, mixing on an open mixer for 3 minutes, thinning 3 times after mixing evenly, and then vulcanizing at 175°C and drying to obtain the mixed rubber.

Example 2

A weather-resistant power cable material is prepared from the following components in parts by weight: 23 parts of polypropylene resin, 10 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 42 parts of fluorosilicone thermoplastic polyurethane elastomer, 4.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3.5 parts of bis(1-vinylimidazole-2-)ketone, 1.5 parts of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 9 parts of ethylene acrylic acid elastomer, 3.5 parts of triallyl isocyanurate, 2.5 parts of coupling agent, 13 parts of filler, 0.9 part of antioxidant, 1.1 parts of lubricant, 1.2 parts of compatibilizer, 1.2 parts of environmentally friendly plasticizer, 1.2 parts of initiator, 0.35 parts of polyphosphoric acid and 0.7 parts of phosphorus pentoxide.

The initiator is a mixture of diisopropylbenzene peroxide, tert-butyl perbenzoate and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:0.9:0.9; the environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is the compatibilizer CMG9801 provided by Jiayrong Polymer (Shanghai) Co., Ltd.; the lubricant is butyl stearate; and the antioxidant is antioxidant 168.

The filler is a mixture of white carbon black, carbon black, fly ash, and aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:1.5:2:3.5; the particle size of the filler is 1100 mesh; the coupling agent is silane coupling agent KH560; the ethylene acrylic elastomer is selected from the brand Dupont ^TM G's AEM; the fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization announcement number CN111154064B; the polypropylene resin is a general-purpose homopolymer polypropylene resin with the Shanghai Petrochemical brand number T30S.

The preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate and a catalyst to a high boiling point solvent, stirring and reacting for 3.5 hours at 75°C in an inert gas atmosphere, then heating to 91°C and continuing stirring and reacting for 10 hours, then precipitating in water, washing the precipitated polymer with ethanol for 4 times, and then rotary evaporation to remove the solvent to obtain the phosphaphenanthryl biphenyl polyurethane functional polymer; the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate, catalyst and high boiling point solvent is 1:1:0.9:7; the catalyst is stannous octoate; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is helium.

A preparation method of the weather-resistant power cable material comprises the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a proportion, mixing at 70°C for 3.5 minutes, then adding 2-acrylamido-2-methylpropanesulfonic acid, bis(1-vinyl imidazole-2-) ketone, 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer, mixing at 127°C for 9 minutes, and then plasticizing at 120°C for 2.5 minutes to obtain a mixed rubber; adding an initiator, polyphosphoric acid and phosphorus pentoxide to the mixed rubber, mixing on an open mixer for 3.5 minutes, thinning 4 times after mixing evenly, and then vulcanizing at 178°C and drying to obtain the mixed rubber.

Example 3

A weather-resistant power cable material is prepared from the following components in parts by weight: 25 parts of polypropylene resin, 12 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 45 parts of fluorosilicone thermoplastic polyurethane elastomer, 5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 4 parts of bis(1-vinylimidazole-2-)ketone, 2 parts of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 10 parts of ethylene acrylic acid elastomer, 4 parts of triallyl isocyanurate, 3 parts of coupling agent, 15 parts of filler, 1 part of antioxidant, 1.3 parts of lubricant, 1.3 parts of compatibilizer, 1.5 parts of environmentally friendly plasticizer, 1.5 parts of initiator, 0.4 parts of polyphosphoric acid and 0.8 parts of phosphorus pentoxide.

The initiator is a mixture of diisopropylbenzene peroxide, tert-butyl perbenzoate and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:1:1; the environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is the compatibilizer CMG9801 provided by Jiayrong Polymer (Shanghai) Co., Ltd.; the lubricant is ethylene bisstearamide; the antioxidant is antioxidant 1076; the filler is a mixture of white carbon black, carbon black, fly ash and aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:2:2:4; the particle size of the filler is 1300 mesh; and the coupling agent is silane coupling agent KH570.

The ethylene acrylic acid elastomer is selected from the Dupont ^TM G's AEM; the fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization announcement number CN111154064B; the polypropylene resin is a general-purpose homopolymer polypropylene resin with the Shanghai Petrochemical brand number T30S.

The preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate and a catalyst to a high boiling point solvent, stirring and reacting for 4 hours at 78°C in an inert gas atmosphere, then heating to 93°C and continuing stirring and reacting for 12 hours, then precipitating in water, washing the precipitated polymer with ethanol for 5 times, and then removing the solvent by rotary evaporation to obtain the phosphaphenanthryl biphenyl polyurethane functional polymer; the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate, catalyst and high boiling point solvent is 1:1:1:8; the catalyst is dibutyltin dilaurate; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is neon.

A preparation method of the weather-resistant power cable material comprises the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a proportion, mixing at 75°C for 4 minutes, then adding 2-acrylamide-2-methylpropanesulfonic acid, bis(1-vinyl imidazole-2-) ketone, 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer, mixing at 130°C for 10 minutes, and then plasticizing at 124°C for 3 minutes to obtain a mixed rubber; adding an initiator, polyphosphoric acid and phosphorus pentoxide to the mixed rubber, mixing on an open mixer for 4 minutes, thinning 4 times after mixing evenly, and then vulcanizing at 180°C and drying to obtain the mixed rubber.

Example 4

A weather-resistant power cable material is prepared from the following components in parts by weight: 28 parts of polypropylene resin, 14 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 48 parts of fluorosilicone thermoplastic polyurethane elastomer, 5.5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 4.5 parts of bis(1-vinylimidazole-2-)ketone, 2.5 parts of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 11 parts of ethylene acrylic acid elastomer, 4.5 parts of triallyl isocyanurate, 3.5 parts of coupling agent, 18 parts of filler, 1.1 parts of antioxidant, 1.4 parts of lubricant, 1.4 parts of compatibilizer, 1.8 parts of environmentally friendly plasticizer, 1.8 parts of initiator, 0.45 parts of polyphosphoric acid and 0.9 parts of phosphorus pentoxide.

The initiator is a mixture of diisopropylbenzene peroxide, tert-butyl perbenzoate, and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:1.1:1.1; the environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is the compatibilizer CMG9801 provided by Jiayirong Polymer (Shanghai) Co., Ltd.; the lubricant is a mixture of ethylene bis stearamide and butyl stearate in a mass ratio of 3:5; the antioxidant is antioxidant 1010, antioxidant The filler is a mixture of white carbon black, carbon black, fly ash, aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:2.5:2:4.8; the particle size of the filler is 1400 mesh; the coupling agent is a mixture of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570 in a mass ratio of 1:3:2

The ethylene acrylic acid elastomer is selected from the Dupont ^TM G's AEM; the fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization announcement number CN111154064B; the polypropylene resin is a general-purpose homopolymer polypropylene resin with the Shanghai Petrochemical brand number T30S.

The preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate and a catalyst to a high boiling point solvent, stirring and reacting at 83°C for 4.5 hours in an inert gas atmosphere, then heating to 93°C and continuing stirring and reacting for 13 hours, then precipitating in water, washing the precipitated polymer with ethanol for 5 times, and then rotary evaporation to remove the solvent to obtain the phosphaphenanthryl biphenyl polyurethane functional polymer; the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate, catalyst and high boiling point solvent is 1:1:1.1:9.5; the catalyst is a mixture formed by mixing dibutyltin dilaurate and stannous octoate in a mass ratio of 3:5; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is argon.

A preparation method of the weather-resistant power cable material comprises the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a proportion, mixing at 78°C for 4.5 minutes, then adding 2-acrylamido-2-methylpropanesulfonic acid, bis(1-vinyl imidazole-2-) ketone, 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer, mixing at 133°C for 11 minutes, and then plasticizing at 128°C for 3.5 minutes to obtain a mixed rubber; adding an initiator, polyphosphoric acid and phosphorus pentoxide to the mixed rubber, mixing on an open mixer for 4.5 minutes, thinning 5 times after mixing evenly, and then vulcanizing at 183°C and drying to obtain the mixed rubber.

Example 5

A weather-resistant power cable material is prepared from the following components in parts by weight: 30 parts of polypropylene resin, 15 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 50 parts of fluorosilicone thermoplastic polyurethane elastomer, 6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of bis(1-vinylimidazole-2-)ketone, 3 parts of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 12 parts of ethylene acrylic acid elastomer, 5 parts of triallyl isocyanurate, 4 parts of coupling agent, 20 parts of filler, 1.2 parts of antioxidant, 1.5 parts of lubricant, 1.5 parts of compatibilizer, 2 parts of environmentally friendly plasticizer, 2 parts of initiator, 0.5 parts of polyphosphoric acid and 1 part of phosphorus pentoxide.

The initiator is a mixture of diisopropylbenzene peroxide, tert-butyl perbenzoate and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:1.2:1.2; the environmentally friendly plasticizer is epoxidized soybean oil; the compatibilizer is the compatibilizer CMG9801 provided by Jiayrong Polymer (Shanghai) Co., Ltd.; the lubricant is ethylene bisstearamide; the antioxidant is antioxidant 1010; the filler is a mixture of white carbon black, carbon black, fly ash and aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:3:2:5; the particle size of the filler is 1500 mesh; and the coupling agent is silane coupling agent KH550.

The ethylene acrylic acid elastomer is selected from the Dupont ^TM G's AEM; the fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization announcement number CN111154064B; the polypropylene resin is a general-purpose homopolymer polypropylene resin with the Shanghai Petrochemical brand number T30S.

The preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate and a catalyst to a high boiling point solvent, stirring and reacting at 85°C for 5 hours in an inert gas atmosphere, then heating to 95°C and continuing stirring and reacting for 14 hours, then precipitating in water, washing the precipitated polymer with ethanol for 6 times, and then rotary evaporation to remove the solvent to obtain the phosphaphenanthryl biphenyl polyurethane functional polymer; the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethyl biphenyl diisocyanate, catalyst and high boiling point solvent is 1:1:1.2:10; the catalyst is dibutyltin dilaurate; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is nitrogen.

A preparation method of the weather-resistant power cable material comprises the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a proportion, mixing at 80°C for 5 minutes, then adding 2-acrylamide-2-methylpropanesulfonic acid, bis(1-vinyl imidazole-2-) ketone, 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer, mixing at 135°C for 12 minutes, and then plasticizing at 130°C for 4 minutes to obtain a mixed rubber; adding an initiator, polyphosphoric acid and phosphorus pentoxide to the mixed rubber, mixing on an open mixer for 5 minutes, thinning 5 times after being uniform, and then vulcanizing at 185°C and drying to obtain the mixed rubber.

Comparative Example 1

A weather-resistant power cable material and a preparation method thereof are basically the same as those in Example 1, except that a fluorosilicone-type thermoplastic polyurethane elastomer is used instead of a phosphaphenanthryl biphenyl polyurethane functional polymer.

Comparative Example 2

A weather-resistant power cable material and a preparation method thereof are substantially the same as those in Example 1, except that 2-acrylamide-2-methylpropanesulfonic acid and bis(1-vinylimidazole-2-)ketone are not added.

In order to further illustrate the beneficial technical effects of the weather-resistant power cable materials involved in each embodiment of the present invention, relevant performance tests were conducted on the weather-resistant power cable materials involved in Examples 1-5 and Comparative Examples 1-2, and the test methods are as follows:

(1) Tensile strength: The tensile strength was tested according to the method of ASTM D412.

(2) Flame retardancy: tested according to UL94 standard.

(3) Weather resistance: Each weather-resistant power cable material product was placed in a constant temperature and humidity test chamber at 85°C × 90% RH for 200 hours. After cooling to room temperature, the tensile strength was measured again. The weather resistance performance was measured by the retention rate of the tensile strength. The larger the value, the better the weather resistance performance.

(4) Low temperature impact performance: refer to GB/T291.14-2008 for testing. After the test, observe whether there are cracks at -50℃. If there are no cracks, it passes, otherwise it fails.

Table 1

project Tensile Strength Weather resistance Flame retardant Low temperature impact performance unit MPa % class — Example 1 38.5 99.68 V-0 pass Example 2 39.0 99.80 V-0 pass Example 3 39.7 99.88 V-0 pass Example 4 40.8 99.93 V-0 pass Example 5 41.6 99.99 V-0 pass Comparative Example 1 36.5 98.89 V-2 Fail Comparative Example 2 37.3 97.57 V-1 Fail

As can be seen from Table 1, the weather-resistant power cable materials involved in the embodiments of the present invention have better tensile properties, more excellent weather resistance, flame retardancy and low temperature resistance than the comparative products. The combined use of phosphaphenanthryl biphenyl polyurethane functional polymers, 2-acrylamido-2-methylpropanesulfonic acid and bis(1-vinylimidazole-2-)ketone is beneficial to improving the above properties.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A weather-resistant power cable material, characterized in that it is made of the following components in parts by weight: 20-30 parts of polypropylene resin, 8-15 parts of phosphaphenanthryl biphenyl polyurethane functional polymer, 40-50 parts of fluorosilicone thermoplastic polyurethane elastomer, 4-6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 3-5 parts of bis(1-vinylimidazole-2-)ketone, 1-3 parts of 3-(1,1-difluoro-2-propylene-1-yl)-2(1H)-quinoxalinone, 8-12 parts of ethylene acrylic elastomer, 3-5 parts of triallyl isocyanurate, 2-4 parts of coupling agent, 10-20 parts of filler, 0.8-1.2 parts of antioxidant, 1-1.5 parts of lubricant, 1-1.5 parts of compatibilizer, 1-2 parts of environmentally friendly plasticizer, 1-2 parts of initiator, 0.3-0.5 parts of polyphosphoric acid, and 0.6-1 parts of phosphorus pentoxide. 2. The weather-resistant power cable material according to claim 1 is characterized in that the initiator is a mixture of diisopropylbenzene peroxide, tert-butyl perbenzoate, and tert-butyl peroxide 3,5,5-trimethylhexanoate in a mass ratio of 1:(0.8-1.2):(0.8-1.2); and the environmentally friendly plasticizer is epoxidized soybean oil. 3. The weather-resistant power cable material according to claim 1, characterized in that the compatibilizer is compatibilizer CMG9801; and the lubricant is at least one of ethylene bisstearamide and butyl stearate. 4. The weather-resistant power cable material according to claim 1, characterized in that the antioxidant is at least one of antioxidant 1010, antioxidant 168, and antioxidant 1076; the filler is a mixture of white carbon black, carbon black, fly ash, and aluminum hydroxide flame retardant VK-LA50 in a mass ratio of 1:(1-3):2:(3-5); and the particle size of the filler is 1000-1500 mesh. 5. The weather-resistant power cable material according to claim 1, characterized in that the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570. 6. The weather-resistant power cable material according to claim 1, characterized in that the ethylene acrylic acid elastomer is selected from the brand Dupont ^TM G's AEM; the polypropylene resin is a general-purpose homopolymer polypropylene resin with a grade of T30S. 7. The weather-resistant power cable material according to claim 1 is characterized in that the preparation method of the phosphaphenanthryl biphenyl polyurethane functional polymer comprises the following steps: adding 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthryl-10-oxide, dimethylbiphenyl diisocyanate, and a catalyst to a high boiling point solvent, stirring and reacting at 70-85° C. in an inert gas atmosphere for 3-5 hours, then heating to 88-95° C. and continuing to stir and react for 8-14 hours, then precipitating in water, washing the precipitated polymer with ethanol for 3-6 times, and then rotary evaporating to remove the solvent to obtain a phosphaphenanthryl biphenyl polyurethane functional polymer. 8. The weather-resistant power cable material according to claim 7, characterized in that the molar ratio of the 10-(2,5-dihydroxyphenyl)-10H-9-oxa-10-phosphaphenanthrene-10-oxide, dimethylbiphenyl diisocyanate, catalyst, and high boiling point solvent is 1:1:(0.8-1.2):(6-10). 9. The weather-resistant power cable material according to claim 7, characterized in that the catalyst is at least one of dibutyltin dilaurate and stannous octoate; the high boiling point solvent is dimethyl sulfoxide; and the inert gas is any one of nitrogen, helium, neon and argon. 10. A method for preparing a weather-resistant power cable material according to any one of claims 1 to 9, characterized in that it comprises the following steps: placing polypropylene resin, phosphaphenanthryl biphenyl polyurethane functional polymer, fluorosilicone thermoplastic polyurethane elastomer and ethylene acrylic acid elastomer in an internal mixer according to a ratio and mixing them at 65-80° C. for 3-5 minutes, then adding 2-acrylamido-2-methylpropanesulfonic acid, bis(1-vinylimidazole-2-)ketone, 3-(1,1-difluoro-2-propylene- 1-yl)-2(1H)-quinoxalinone, triallyl isocyanurate, coupling agent, filler, antioxidant, lubricant, compatibilizer and environmentally friendly plasticizer are mixed at 125-135°C for 8-12min, and then plasticized at 115-130°C for 2-4min to obtain a mixed rubber; initiator, polyphosphoric acid and phosphorus pentoxide are added to the mixed rubber, mixed on an open mill for 3-5min, and the mixture is uniformly thinned 3-5 times, and then vulcanized at 175-185°C and dried to obtain the mixed rubber.