CN109251399B - Soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for high-voltage line in vehicle and preparation method thereof - Google Patents
Soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for high-voltage line in vehicle and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for an in-vehicle high-voltage wire and a preparation method thereof, wherein the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire comprises the following components in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer, 15-25 parts of ethylene-ethyl acrylate copolymer, 5-10 parts of ethylene propylene rubber, 10-15 parts of polypropylene-ethylene propylene rubber block copolymer, 10-15 parts of maleic anhydride grafted modified resin, 130 parts of halogen-free flame retardant, 10-15 parts of flame retardant synergist, 1.2-3 parts of antioxidant, 2-3 parts of cross-linking agent, 15-20 parts of plasticizer and 2-3 parts of processing aid. Compared with the prior art, the invention has the following advantages: (1) the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire has the performances of softness, heat resistance, low temperature resistance and oil resistance; (2) the cable material disclosed by the invention can obtain a good flame-retardant effect by adopting a small amount of flame retardant, and the flexibility of the cable material is greatly improved while the flame-retardant performance is ensured.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and relates to a novel cable material, in particular to a soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for an in-vehicle high-voltage wire and a preparation method thereof.
Background
The automobile industry is an important prop industry of national economy in China, plays an important role in the development of the national economy and society, and is a strategic emerging industry of China in the future and a national key support development object on the basis of the consideration of energy safety, environmental protection and strong nation for building the automobile industry. Therefore, the market demand of the high-voltage line in the automobile is continuously increased, and meanwhile, the halogen-free flame-retardant material has great harm to people and environment when the high-voltage line in the automobile is in fire, so that the halogen-free flame-retardant material becomes a development direction of the cable for the high-voltage line in the automobile. The special use environment of the automobile is relatively strict, and in the use environment, the cable has basic use characteristics, and also has the performances of oil resistance, high temperature resistance, high flame retardance, flexibility and the like.
At present, most of insulation or sheaths of automobile cables in China are made of thermoplastic/thermosetting heat-resistant materials. The base material of the thermoplastic material is usually Polyethylene (PE), polyethylene + ethylene vinyl acetate (PE + EVA), etc., and the thermosetting material is usually vulcanized rubber or cross-linked polyolefin. For such materials, high flame retardancy is clearly contradictory to softness; the flame retardancy is mutually restricted with the required high insulation and high flexibility. In addition, the oil and solvent resistance is required while maintaining the linear swelling or volume expansion ratio of the insulating material within a predetermined range; the high temperature resistance is required, and the low temperature resistance is also required. All of these materials are "lost" and are difficult to avoid "simply" for conventional heat-resistant and flame-retardant materials.
Disclosure of Invention
The technical problem to be solved is as follows: in order to overcome the defects of the prior art, obtain a halogen-free flame-retardant cable material and overcome the defects of contradiction among softness, oil resistance and high flame retardance, the invention provides a soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for an in-vehicle high-voltage wire and a preparation method thereof.
The technical scheme is as follows: the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-car high-voltage wire comprises the following components in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer, 15-25 parts of ethylene-ethyl acrylate copolymer, 5-10 parts of ethylene propylene rubber, 10-15 parts of polypropylene-ethylene propylene rubber block copolymer, 10-15 parts of maleic anhydride grafted modified resin, 130 parts of halogen-free flame retardant, 10-15 parts of flame retardant synergist, 1.2-3 parts of antioxidant, 2-3 parts of cross-linking agent, 15-20 parts of plasticizer and 2-3 parts of processing aid.
Preferably, the ethylene-vinyl acetate copolymer has a melt index of 1-3g/10min at 190 ℃ and a vinyl acetate content of 25-40% by weight; the melt index of the ethylene-ethyl acrylate copolymer at 190 ℃ is 1-3g/10min, and the content of ethyl acrylate is 15-30%; the Mooney viscosity of the ethylene propylene rubber at 125 ℃ is 40-50, and the weight content of ethylene is 70%.
Preferably, the polypropylene-ethylene propylene rubber block copolymer is a high-molecular elastomer material product formed by dispersing highly vulcanized ethylene propylene diene monomer particles in a continuous polypropylene phase matrix. Preferably, the compound is Shandong 251-80W 232.
Preferably, the maleic anhydride graft modified resin is a maleic anhydride monomer graft of polyethylene vinyl acetate. The product is a JCT-1P type product produced by Shanghai Jime Polymer materials Co.
Preferably, the halogen-free flame retardant is a blend of aluminum diethylphosphinate and aluminum hydroxide in a weight ratio of 3: 1; the flame retardant synergist is melamine polyphosphate coated by a silane coupling agent, and the preparation method comprises the following steps: firstly, preparing an aqueous solution of a silane coupling agent according to a certain proportion, then mixing the aqueous solution with melamine polyphosphate according to a certain mass ratio, fully stirring, evaporating to obtain white powder at 65 +/-2 ℃, and then grinding into fine powder to obtain the silane coupling agent coated melamine polyphosphate. The mass ratio of the silane coupling agent to the melamine polyphosphate is (0.3-0.5)% to 1.
Preferably, the antioxidant is a mixture of dilauryl thiodipropionate and pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] in a weight ratio of 0.5: 1; the cross-linking agent is triallyl isocyanurate; the plasticizer is at least one of trimethylolpropane, diethylene glycol dibenzoate and acetyl tri-n-butyl citrate; the processing aid is silicone master batch. The silicone master batch is MB002 silicone master batch of Dow Corning company.
The preparation method of the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire comprises the following steps:
(1) putting ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene propylene rubber, polypropylene-ethylene propylene rubber block copolymer and maleic anhydride grafted modified resin into a pressurized internal mixer, mixing, fully mixing, plasticizing well, and then putting into a granulator for granulating;
(2) putting the plastic particles prepared in the step (1) and a plasticizer into a high-speed stirrer, adding an antioxidant and a processing aid, stirring at a low speed, and then putting the mixture into a cooling tank for stabilization;
(3) and (3) putting the mixture obtained in the step (2) into a pressurized internal mixer, adding the halogen-free flame retardant, the flame-retardant synergist and the crosslinking agent, then pressurizing and mixing, adding the mixed material into a double-screw extruder by using a feeder, mixing, plasticizing and granulating, and drying to obtain the finished product.
Preferably, the twin-screw extruder has four temperature zones: the charging section is 140 ℃, the mixing section is 160 ℃, the granulation section is 165 ℃ and the machine head is 155 ℃.
Has the advantages that: (1) the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire has the performances of softness, heat resistance, low temperature resistance and oil resistance; (2) the cable material disclosed by the invention can obtain a good flame-retardant effect by adopting a small amount of flame retardant, and the flexibility of the cable material is greatly improved while the flame-retardant performance is ensured.
Detailed Description
The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and substance of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
Example 1
The soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-car high-voltage wire comprises the following components in parts by weight: 42 parts of ethylene-vinyl acetate copolymer, 25 parts of ethylene-ethyl acrylate copolymer, 7 parts of ethylene-propylene rubber, 11 parts of polypropylene-ethylene-propylene rubber block copolymer, 15 parts of maleic anhydride grafted modified resin, 100 parts of halogen-free flame retardant, 10 parts of flame retardant synergist, 1.5 parts of antioxidant, 2 parts of crosslinking agent, 16 parts of plasticizer and 2 parts of processing aid.
The ethylene-vinyl acetate copolymer has a melt index of 1g/10min at 190 ℃ and a weight content of 25% of vinyl acetate; the melt index of the ethylene-ethyl acrylate copolymer at 190 ℃ is 1g/10min, and the content of ethyl acrylate is 15%; the Mooney viscosity of the ethylene propylene rubber at 125 ℃ is 40, and the weight content of ethylene is 70%.
The polypropylene-ethylene propylene rubber block copolymer is a high-molecular elastomer material product formed by dispersing highly vulcanized ethylene propylene diene monomer particles in a continuous polypropylene phase matrix. Purchased in Shandu Ping 251-80W 232.
The maleic anhydride graft modified resin is a maleic anhydride monomer graft of polyethylene vinyl acetate. The product is a JCT-1P type product produced by Shanghai Jime Polymer materials Co.
The halogen-free flame retardant is a blend of aluminum diethylphosphinate and aluminum hydroxide in a weight ratio of 3: 1; the flame retardant synergist is melamine polyphosphate coated by a silane coupling agent, and the mass ratio of the melamine polyphosphate to the flame retardant synergist is 0.3: 1.
The antioxidant is a mixture of dilauryl thiodipropionate and tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester according to the weight ratio of 0.5: 1; the cross-linking agent is triallyl isocyanurate; the plasticizer is trimethylolpropane; the processing aid is silicone master batch. The silicone master batch is MB002 silicone master batch of Dow Corning company.
The preparation method of the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire comprises the following steps:
(1) putting ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene propylene rubber, polypropylene-ethylene propylene rubber block copolymer and maleic anhydride grafted modified resin into a pressurized internal mixer, mixing for 5 minutes, fully mixing, plasticizing well and then putting into a granulator for granulating;
(2) putting the plastic particles prepared in the step (1) and a plasticizer into a high-speed stirrer, stirring at a high speed for 5 minutes, then adding an antioxidant and a processing aid, stirring at a low speed for 5 minutes, and then putting the mixture into a cooling tank for stabilization;
(3) and (3) putting the mixture obtained in the step (2) into a pressurized internal mixer, adding the halogen-free flame retardant, the flame-retardant synergist and the crosslinking agent, then pressurizing and banburying for 15 minutes, adding the banburied material into a double-screw extruder by using a feeder, mixing, plasticizing and granulating, and drying to obtain the finished product. The four temperature zones of the twin-screw extruder are: the charging section is 140 ℃, the mixing section is 160 ℃, the granulation section is 165 ℃ and the machine head is 155 ℃.
Example 2
The soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-car high-voltage wire comprises the following components in parts by weight: 48 parts of ethylene-vinyl acetate copolymer, 20 parts of ethylene-ethyl acrylate copolymer, 5 parts of ethylene-propylene rubber, 15 parts of polypropylene-ethylene-propylene rubber block copolymer, 12 parts of maleic anhydride grafted modified resin, 110 parts of halogen-free flame retardant, 12 parts of flame retardant synergist, 2 parts of antioxidant, 2 parts of crosslinking agent, 18 parts of plasticizer and 2.5 parts of processing aid.
The ethylene-vinyl acetate copolymer has a melt index of 2g/10min at 190 ℃ and a vinyl acetate content of 32% by weight; the melt index of the ethylene-ethyl acrylate copolymer at 190 ℃ is 2g/10min, and the content of ethyl acrylate is 22%; the Mooney viscosity of the ethylene propylene rubber at 125 ℃ is 45, and the weight content of ethylene is 70%.
The polypropylene-ethylene propylene rubber block copolymer is a high-molecular elastomer material product formed by dispersing highly vulcanized ethylene propylene diene monomer particles in a continuous polypropylene phase matrix. Purchased in Shandu Ping 251-80W 232.
The maleic anhydride graft modified resin is a maleic anhydride monomer graft of polyethylene vinyl acetate. The product is a JCT-1P type product produced by Shanghai Jime Polymer materials Co.
The halogen-free flame retardant is a blend of aluminum diethylphosphinate and aluminum hydroxide in a weight ratio of 3: 1; the flame retardant synergist is melamine polyphosphate coated by a silane coupling agent, and the mass ratio of the melamine polyphosphate to the flame retardant synergist is 0.4: 1.
The antioxidant is a mixture of dilauryl thiodipropionate and tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester according to the weight ratio of 0.5: 1; the cross-linking agent is triallyl isocyanurate; the plasticizer is diethylene glycol dibenzoate; the processing aid is silicone master batch. The silicone master batch is MB002 silicone master batch of Dow Corning company.
The preparation method of the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire comprises the following steps:
(1) putting ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene propylene rubber, polypropylene-ethylene propylene rubber block copolymer and maleic anhydride grafted modified resin into a pressurized internal mixer, mixing for 8 minutes, fully mixing, plasticizing well and then putting into a granulator for granulating;
(2) putting the plastic particles prepared in the step (1) and a plasticizer into a high-speed stirrer, stirring at a high speed for 5 minutes, then adding an antioxidant and a processing aid, stirring at a low speed for 8 minutes, and then putting the mixture into a cooling tank for stabilization;
(3) and (3) putting the mixture obtained in the step (2) into a pressurized internal mixer, adding the halogen-free flame retardant, the flame-retardant synergist and the crosslinking agent, then pressurizing and banburying for 15 minutes, adding the banburied material into a double-screw extruder by using a feeder, mixing, plasticizing and granulating, and drying to obtain the finished product. The four temperature zones of the twin-screw extruder are: the charging section is 140 ℃, the mixing section is 160 ℃, the granulation section is 165 ℃ and the machine head is 155 ℃.
Example 3
The soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-car high-voltage wire comprises the following components in parts by weight: 50 parts of ethylene-vinyl acetate copolymer, 20 parts of ethylene-ethyl acrylate copolymer, 10 parts of ethylene-propylene rubber, 8 parts of polypropylene-ethylene-propylene rubber block copolymer, 12 parts of maleic anhydride graft modified resin, 130 parts of halogen-free flame retardant, 14 parts of flame retardant synergist, 3 parts of antioxidant, 3 parts of crosslinking agent, 20 parts of plasticizer and 2 parts of processing aid.
The ethylene-vinyl acetate copolymer has a melt index of 3g/10min at 190 ℃ and a vinyl acetate content of 40% by weight; the melt index of the ethylene-ethyl acrylate copolymer at 190 ℃ is 3g/10min, and the content of ethyl acrylate is 30%; the Mooney viscosity of the ethylene propylene rubber at 125 ℃ is 50, and the weight content of ethylene is 70%.
The polypropylene-ethylene propylene rubber block copolymer is a high-molecular elastomer material product formed by dispersing highly vulcanized ethylene propylene diene monomer particles in a continuous polypropylene phase matrix. Purchased in Shandu Ping 251-80W 232.
The maleic anhydride graft modified resin is a maleic anhydride monomer graft of polyethylene vinyl acetate. The product is a JCT-1P type product produced by Shanghai Jime Polymer materials Co.
The halogen-free flame retardant is a blend of aluminum diethylphosphinate and aluminum hydroxide in a weight ratio of 3: 1; the flame retardant synergist is melamine polyphosphate coated by a silane coupling agent, and the mass ratio of the melamine polyphosphate to the flame retardant synergist is 0.5: 1.
The antioxidant is a mixture of dilauryl thiodipropionate and tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester according to the weight ratio of 0.5: 1; the cross-linking agent is triallyl isocyanurate; the plasticizer is acetyl tributyl citrate; the processing aid is silicone master batch. The silicone master batch is MB002 silicone master batch of Dow Corning company.
The preparation method of the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-vehicle high-voltage wire comprises the following steps:
(1) putting ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene propylene rubber, polypropylene-ethylene propylene rubber block copolymer and maleic anhydride grafted modified resin into a pressurized internal mixer, mixing for 10 minutes, fully mixing, plasticizing well and then putting into a granulator for granulating;
(2) putting the plastic particles prepared in the step (1) and a plasticizer into a high-speed stirrer, stirring at a high speed for 5 minutes, then adding an antioxidant and a processing aid, stirring at a low speed for 10 minutes, and then putting the mixture into a cooling tank for stabilization;
(3) and (3) putting the mixture obtained in the step (2) into a pressurized internal mixer, adding the halogen-free flame retardant, the flame-retardant synergist and the crosslinking agent, then pressurizing and banburying for 15 minutes, adding the banburied material into a double-screw extruder by using a feeder, mixing, plasticizing and granulating, and drying to obtain the finished product. The four temperature zones of the twin-screw extruder are: the charging section is 140 ℃, the mixing section is 160 ℃, the granulation section is 165 ℃ and the machine head is 155 ℃.
The cable materials prepared in examples 1-3 were tested for performance and the results are shown in the following table:
Claims (1)
1. the soft low-smoke halogen-free high-flame-retardant oil-resistant cable material for the in-car high-voltage wire is characterized by comprising the following components in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer, 15-25 parts of ethylene-ethyl acrylate copolymer, 5-10 parts of ethylene propylene rubber, 10-15 parts of polypropylene-ethylene propylene rubber block copolymer, 10-15 parts of maleic anhydride grafted modified resin, 100 parts of halogen-free flame retardant 130, 10-15 parts of flame retardant synergist, 1.2-3 parts of antioxidant, 2-3 parts of cross-linking agent, 15-20 parts of plasticizer and 2-3 parts of processing aid; the ethylene-vinyl acetate copolymer has a melt index of 1-3g/10min at 190 ℃ and a weight content of 25-40% of vinyl acetate; the melt index of the ethylene-ethyl acrylate copolymer at 190 ℃ is 1-3g/10min, and the content of ethyl acrylate is 15-30%; the Mooney viscosity of the ethylene propylene rubber at 125 ℃ is 40-50, and the weight content of ethylene is 70%; the polypropylene-ethylene propylene rubber block copolymer is a high-molecular elastomer material product formed by dispersing highly vulcanized ethylene propylene diene monomer particles in a continuous polypropylene phase matrix; the maleic anhydride graft modified resin is a maleic anhydride monomer graft of polyethylene vinyl acetate; the halogen-free flame retardant is a blend of aluminum diethylphosphinate and aluminum hydroxide in a weight ratio of 3: 1; the flame retardant synergist is melamine polyphosphate coated by a silane coupling agent, and the mass ratio of the silane coupling agent to the melamine polyphosphate is (0.3-0.5)% to 1; the antioxidant is a mixture of dilauryl thiodipropionate and tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester according to the weight ratio of 0.5: 1; the cross-linking agent is triallyl isocyanurate; the plasticizer is at least one of trimethylolpropane, diethylene glycol dibenzoate and acetyl tri-n-butyl citrate; the processing aid is silicone master batch; the cable material is prepared by the following method:
(1) putting ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene propylene rubber, polypropylene-ethylene propylene rubber block copolymer and maleic anhydride grafted modified resin into a pressurized internal mixer, mixing, fully mixing, plasticizing well, and then putting into a granulator for granulating;
(2) putting the plastic particles prepared in the step (1) and a plasticizer into a high-speed stirrer, adding an antioxidant and a processing aid, stirring at a low speed, and then putting the mixture into a cooling tank for stabilization;
(3) putting the mixture obtained in the step (2) into a pressurized internal mixer, adding the halogen-free flame retardant, the flame-retardant synergist and the crosslinking agent, then pressurizing and mixing, adding the mixed material into a double-screw extruder by using a feeder, mixing, plasticizing and granulating, and drying to obtain a finished product;
wherein, the four temperature areas of the double-screw extruder are as follows: the charging section is 140 ℃, the mixing section is 160 ℃, the granulation section is 165 ℃ and the machine head is 155 ℃.
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| KR102473869B1 (en) * | 2019-10-31 | 2022-12-02 | 롯데케미칼 주식회사 | Thermoplastic resin composition and article produced therefrom |
| CN111944315A (en) * | 2020-08-20 | 2020-11-17 | 安徽天虹电缆有限公司 | High-strength high-temperature-resistant oil-resistant cable material |
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| CN109251399A (en) | 2019-01-22 |
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