CN112226049A - Flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material and preparation method of master batch thereof - Google Patents
Flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material and preparation method of master batch thereof Download PDFInfo
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Abstract
The invention relates to the technical field of high polymer materials, in particular to a flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material and a preparation method thereof, wherein the elastomer heat-shrinkable tube material comprises the following raw materials in parts by weight: 20-40 parts of thermoplastic polyester elastomer, 15-30 parts of ethylene acrylate rubber, 20-35 parts of composite flame retardant, 8-15 parts of compatilizer, 3-5 parts of color master batch, 0.5-2 parts of antioxidant, 0.3-1.5 parts of mildew preventive and 0-10 parts of acrylate rubber. The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material prepared by the invention has excellent flame retardance, oil resistance and mildew-proof effect, excellent mechanical property and high and low temperature resistance, and excellent comprehensive performance. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube master batch is simple and efficient, is convenient to operate and control, is beneficial to industrial production, and has stable product performance.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a flame-retardant oil-resistant mildew-proof elastomer thermal shrinkage pipe material and a preparation method thereof.
Background
With the development of economy and the progress of science and technology, heat shrinkable tubes are increasingly widely applied in the fields of automobiles, electronics, electrics, national defense, military industry and the like. However, the existing heat-shrinkable tube still has the problems of low oil resistance, poor flame retardance and mildew resistance, and poor temperature resistance, mechanical property and the like, so that the use of the heat-shrinkable tube is limited and needs to be further improved.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material and the preparation method thereof.
The invention also aims to provide a preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material, which is simple to operate, convenient to control, high in production efficiency and beneficial to industrial production.
One of the purposes of the invention is realized by the following technical scheme:
the flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material comprises the following raw materials in parts by weight:
the flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material disclosed by the invention adopts the thermoplastic polyester elastomer and the ethylene acrylate rubber as main raw materials, and is matched with the composite flame retardant, the color master batch, the antioxidant, the mildew preventive and the like, the compatibility of the raw materials is good, and the raw materials are mutually benefited, so that the prepared flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material has excellent flame retardance, oil resistance and mildew resistance, excellent mechanical property, high and low temperature resistance and excellent comprehensive performance. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube master batch is simple and efficient, is convenient to operate and control, is beneficial to industrial production, and has stable product performance.
Further, the compatilizer is at least one of maleic anhydride grafted ethylene-octene copolymer, ethylene-acrylate-glycidyl acrylate terpolymer and maleic anhydride-ethylene-acrylate terpolymer. By adopting the compatilizer, the invention can obviously improve the binding force among the thermoplastic polyester elastomer, the ethylene acrylate rubber and the composite flame retardant, obviously improve the tensile strength, the elongation at break, the oil resistance and the like of the elastomer heat-shrinkable tube material, and improve the comprehensive performance of the product.
Furthermore, the thermoplastic polyester elastomer has the hardness of 30-50A, the melting point of 140-160 ℃ and the melt index (190 ℃, 2.16KG) of 3-8 g/10 min. The Mooney viscosity (ML1+4, 100 ℃) of the ethylene acrylate rubber is 15-30. The acrylate rubber is preferably, but not limited to, tunnel Qinglong AR 140.
Further, the antioxidant is at least one of antioxidant DSTP, antioxidant DNP, antioxidant 1010, antioxidant 1024 and antioxidant BHT. Preferably, the antioxidant is composed of antioxidant 1010, antioxidant DSTP and antioxidant BHT according to the weight ratio of 1-2: 0.4-0.8: 1. By adopting the antioxidant, the thermal degradation and oxidative degradation of the composite material can be effectively inhibited, the surface smoothness is improved, and the antioxidant effect can be kept for a long time.
Further, the preparation method of the color master batch comprises the following steps: uniformly mixing 60-70 parts of carrier resin, 5-9 parts of pigment powder, 4-7 parts of dispersing agent and 8-15 parts of synergistic auxiliary agent in parts by weight to form a mixture; then a double-screw extruder is adopted to perform blending extrusion granulation and drying at the temperature of 150 plus 190 ℃ to prepare the color master batch.
Further, the carrier resin is composed of LLDPE resin and EBA resin according to the weight ratio of 2-3: 1.
Further, the dispersing agent is at least one of polyethylene wax and stearate.
Furthermore, the synergistic auxiliary agent consists of ethylene bis stearamide, nano titanium dioxide and PVDF resin according to the weight ratio of 1: 0.4-0.7: 1-1.5. By adopting the synergistic additive, the weather resistance, chemical corrosion resistance and high temperature resistance of the color master batch are improved, and the mechanical property of the color master batch is improved. The PVDF resin is preferably but not limited to Akema Kynar PVDF HSV 900.
The color master batch disclosed by the invention adopts LLDPE resin and EVA resin as carrier resins, adopts ethylene bis stearamide, nano titanium dioxide and PVDF resin as synergistic auxiliaries and is matched with other raw materials, when the color master batch is applied to a flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material, the color master batch has excellent toughening property and weather resistance, can improve the wear resistance, size stability, oil resistance and mechanical strength of the elastomer heat-shrinkable tube material, and can improve the impact property of the elastomer heat-shrinkable tube material.
Further, the mildew preventive is at least one of a silver ion antibacterial agent, a zinc-silver ion composite antibacterial agent and an isothiazolinone antibacterial agent. Furthermore, the mildew preventive consists of 2-thiazole-4-yl benzimidazole and silver ion antibacterial agent according to the weight ratio of 1: 1.2-2. By adopting the mildew preventive, the mildew resistance of the elastomer heat-shrinkable tube material can be greatly improved, and the service life of the elastomer heat-shrinkable tube material is prolonged.
Further, the composite flame retardant comprises the following raw materials in parts by weight: 20-30 parts of decabromodiphenylethane, 7-12 parts of antimony trioxide and 5-10 parts of magnesium hydroxide. Further, the decabromodiphenylethane is one of Kobao FM2100R or Yabao 8010. The antimony trioxide is of astronomical star or twinkle, and the purity is more than 99.8%; the magnesium hydroxide is Yabao MAGNIFIN H5.
The composite flame retardant can improve the flame retardant property, the mechanical property and the surface property of a composite material, has good dispersibility and uniform distribution in a flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material system, and improves the comprehensive performance and the product stability of the elastomer heat-shrinkable tube material.
The other purpose of the invention is realized by the following technical scheme: the preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch comprises the following steps:
(1) adding the raw materials into a high-speed mixer according to a proportion and uniformly mixing to obtain a mixture;
(2) and adding the obtained mixture into a double-screw extruder, and performing melt extrusion granulation to obtain the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch.
Further, the mixing temperature in the step (1) is 60-80 ℃, the rotating speed of the high-speed mixer is 500-800r/min, and the mixing time is 15-30 min.
Further, in the step (2), the six-interval temperatures of the twin-screw extruder are respectively as follows: the first region 110-.
The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube master batch disclosed by the invention is simple and efficient in preparation process, convenient to operate and control and beneficial to industrial production. The invention can lead the elastomer heat shrinkable tube material to be extruded stably, and has good formability, smooth surface, high glossiness, good appearance and stable product performance by strictly controlling the temperature of each area in the extrusion process.
The invention has the beneficial effects that: the flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material disclosed by the invention adopts the thermoplastic polyester elastomer and the ethylene acrylate rubber as main raw materials, and is matched with the composite flame retardant, the color master batch, the antioxidant, the mildew preventive and the like, and the raw materials are good in compatibility and mutually beneficial, so that the prepared flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material has excellent flame retardance, oil resistance and mildew resistance, excellent mechanical property and high and low temperature resistance, and excellent comprehensive performance. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube master batch is simple and efficient, is convenient to operate and control, is beneficial to industrial production, and has stable product performance.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material comprises the following raw materials in parts by weight: 30 parts of thermoplastic polyester elastomer, 22 parts of ethylene acrylate rubber, 28 parts of composite flame retardant, 12 parts of compatilizer, 4 parts of color master batch, 1 part of antioxidant, 0.8 part of mildew preventive and 5 parts of acrylate rubber.
Further, the compatilizer consists of maleic anhydride grafted ethylene-octene copolymer and maleic anhydride-ethylene-acrylate terpolymer according to the weight ratio of 1: 2. The thermoplastic polyester elastomer has a hardness of 44A, a melting point of 150 ℃ and a melt index (190 ℃, 2.16KG) of 4g/10 min. The Mooney viscosity (ML1+4, 100 ℃) of the ethylene acrylate rubber was 26. The acrylate rubber is preferably, but not limited to, tunnel Qinglong AR 140.
Further, the antioxidant is composed of antioxidant 1010, antioxidant DSTP and antioxidant BHT according to the weight ratio of 1.5: 0.46: 1.
Further, the preparation method of the color master batch comprises the following steps: according to the weight portion, 65 portions of carrier resin, 7 portions of pigment powder, 5 portions of dispersing agent and 11 portions of synergistic additive are uniformly mixed to form a mixture; and then adopting a double-screw extruder to perform blending extrusion granulation and drying at 170 ℃ to prepare the color master batch.
Further, the carrier resin is composed of LLDPE resin and EBA resin according to the weight ratio of 2.5: 1. The dispersing agent is composed of polyethylene wax and potassium stearate according to the weight ratio of 1: 2. The synergistic auxiliary agent consists of ethylene bis stearamide, nano titanium dioxide and PVDF resin according to the weight ratio of 1: 0.6: 1.2. The PVDF resin is preferably but not limited to Akema Kynar PVDF HSV 900. Further, the LLDPE resin is preferably, but not limited to, exxon mobil LL 6201 XR. The EBA resin is preferably, but not limited to, dupont dow 34035.
Furthermore, the mildew preventive consists of 2-thiazole-4-yl benzimidazole and silver ion antibacterial agent according to the weight ratio of 1: 1.5.
Further, the composite flame retardant comprises the following raw materials in parts by weight: 25 parts of decabromodiphenylethane, 9 parts of antimony trioxide and 7 parts of magnesium hydroxide. Further, the decabromodiphenylethane is Kobazao FM 2100R. The antimony trioxide is the antimony trioxide of Yuxing, and the purity is more than 99.8 percent. The magnesium hydroxide is Yabao MAGNIFIN H5.
The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch comprises the following steps:
(1) adding the raw materials into a high-speed mixer according to a proportion and uniformly mixing to obtain a mixture;
(2) and adding the obtained mixture into a double-screw extruder, and performing melt extrusion granulation to obtain the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch.
Further, in the step (1), the mixing temperature is 75 ℃, the rotating speed of the high-speed mixer is 600-r/min, and the mixing time is 20 min.
Further, in the step (2), the six-interval temperatures of the twin-screw extruder are respectively as follows: the first interval is 120 ℃, the second interval is 130 ℃, the third interval is 140 ℃, the fourth interval is 150 ℃, the fifth interval is 160 ℃ and the sixth interval is 160 ℃.
Example 2
The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material comprises the following raw materials in parts by weight: 20 parts of thermoplastic polyester elastomer, 15 parts of ethylene acrylate rubber, 20 parts of composite flame retardant, 8 parts of compatilizer, 3 parts of color master batch, 0.5 part of antioxidant and 0.3 part of mildew preventive.
Further, the compatilizer consists of maleic anhydride grafted ethylene-octene copolymer and maleic anhydride-ethylene-acrylate terpolymer according to the weight ratio of 1: 1. The antioxidant is composed of antioxidant 1010, antioxidant DSTP and antioxidant BHT according to the weight ratio of 1: 0.4: 1. The thermoplastic polyester elastomer has the hardness of 36A, the melting point of 143 ℃ and the melt index (190 ℃, 2.16KG) of 6g/10 min. The Mooney viscosity (ML1+4, 100 ℃) of the ethylene acrylate rubber was 22.
Further, the preparation method of the color master batch comprises the following steps: uniformly mixing 60 parts of carrier resin, 5 parts of pigment powder, 47 parts of dispersing agent and 8 parts of synergistic additive in parts by weight to form a mixture; and then adopting a double-screw extruder to perform blending extrusion granulation and drying at 150 ℃ to prepare the color master batch. Further, the carrier resin is composed of LLDPE resin and EBA resin according to the weight ratio of 2: 1. The dispersing agent is polyethylene wax.
Furthermore, the synergistic auxiliary agent consists of ethylene bis stearamide, nano titanium dioxide and PVDF resin according to the weight ratio of 1: 0.4: 1.
Furthermore, the mildew preventive consists of 2-thiazole-4-yl benzimidazole and silver ion antibacterial agent according to the weight ratio of 1: 1.2.
Further, the composite flame retardant comprises the following raw materials in parts by weight: 20 parts of decabromodiphenylethane, 7 parts of antimony trioxide and 5 parts of magnesium hydroxide. Further, the decabromodiphenylethane is koppengya 8010. The antimony trioxide is twinkling antimony trioxide, and the purity is more than 99.8%; the magnesium hydroxide is Yabao MAGNIFIN H5.
The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch comprises the following steps:
(1) adding the raw materials into a high-speed mixer according to a proportion and uniformly mixing to obtain a mixture;
(2) and adding the obtained mixture into a double-screw extruder, and performing melt extrusion granulation to obtain the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch.
Further, in the step (1), the mixing temperature is 60 ℃, the rotating speed of the high-speed mixer is 500-r/min, and the mixing time is 30 min.
Further, in the step (2), the six-interval temperatures of the twin-screw extruder are respectively as follows: the first interval is 110 ℃, the second interval is 120 ℃, the third interval is 130 ℃, the fourth interval is 140 ℃, the fifth interval is 150 ℃ and the sixth interval is 150 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 3
The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material comprises the following raw materials in parts by weight: 40 parts of thermoplastic polyester elastomer, 30 parts of ethylene acrylate rubber, 35 parts of composite flame retardant, 15 parts of compatilizer, 5 parts of color master batch, 2 parts of antioxidant, 1.5 parts of mildew preventive and 10 parts of acrylate rubber. The thermoplastic polyester elastomer has the hardness of 42A, the melting point of 148 ℃ and the melt index (190 ℃, 2.16KG) of 4g/10 min. The Mooney viscosity (ML1+4, 100 ℃) of the ethylene acrylate rubber was 25.
Further, the compatilizer is composed of maleic anhydride grafted ethylene-octene copolymer, ethylene-acrylate-glycidyl acrylate terpolymer and maleic anhydride-ethylene-acrylate terpolymer according to the weight ratio of 1: 0.2: 1.8.
Further, the preparation method of the color master batch comprises the following steps: according to the weight portion, 70 portions of carrier resin, 9 portions of pigment powder, 7 portions of dispersing agent and 15 portions of synergistic auxiliary agent are uniformly mixed to form a mixture; and then adopting a double-screw extruder to perform blending extrusion granulation and drying at 190 ℃ to prepare the color master batch.
Further, the carrier resin is composed of LLDPE resin and EBA resin according to the weight ratio of 3: 1. The dispersing agent is composed of polyethylene wax and potassium stearate according to the weight ratio of 1: 2.
Furthermore, the synergistic auxiliary agent consists of ethylene bis stearamide, nano titanium dioxide and PVDF resin according to the weight ratio of 1: 0.7: 1.5. Furthermore, the mildew preventive consists of 2-thiazole-4-yl benzimidazole and silver ion antibacterial agent according to the weight ratio of 1: 2.
Further, the composite flame retardant comprises the following raw materials in parts by weight: 30 parts of decabromodiphenylethane, 12 parts of antimony trioxide and 10 parts of magnesium hydroxide. Further, the decabromodiphenylethane is Kobazao FM 2100R. The antimony trioxide is the antimony trioxide of Yuxing, and the purity is more than 99.8 percent; the magnesium hydroxide is Yabao MAGNIFIN H5.
The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch comprises the following steps:
(1) adding the raw materials into a high-speed mixer according to a proportion and uniformly mixing to obtain a mixture;
(2) and adding the obtained mixture into a double-screw extruder, and performing melt extrusion granulation to obtain the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch.
Further, in the step (1), the mixing temperature is 80 ℃, the rotating speed of the high-speed mixer is 800r/min, and the mixing time is 15 min.
Further, in the step (2), the six-interval temperatures of the twin-screw extruder are respectively as follows: the first interval is 130 ℃, the second interval is 140 ℃, the third interval is 150 ℃, the fourth interval is 160 ℃, the fifth interval is 170 ℃ and the sixth interval is 170 ℃.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 4
The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material comprises the following raw materials in parts by weight: 30 parts of thermoplastic polyester elastomer, 25 parts of ethylene acrylate rubber, 25 parts of composite flame retardant, 12 parts of compatible material, 4 parts of color master batch, 1.5 parts of antioxidant, 1.2 parts of mildew preventive and 6 parts of acrylate rubber.
Further, the preparation method of the color master batch comprises the following steps: according to the weight portion, 66 portions of carrier resin, 8 portions of pigment powder, 6 portions of dispersing agent and 12 portions of synergistic auxiliary agent are uniformly mixed to form a mixture; and then adopting a double-screw extruder to perform blending extrusion granulation and drying at 180 ℃ to prepare the color master batch. Further, the carrier resin is composed of LLDPE resin and EBA resin according to the weight ratio of 2.5: 1.
Furthermore, the synergistic auxiliary agent consists of ethylene bis stearamide, nano titanium dioxide and PVDF resin according to the weight ratio of 1: 0.6: 1.4.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Comparative example 1
This comparative example differs from example 1 in that: the color master batch in the comparative example 1 adopts the cabot color master batch PE2772 to replace the color master batch in the example 1, and the flame retardant in the comparative example adopts the flame retardant SF-100 to replace the composite flame retardant in the example 1. The remainder of this comparative example is the same as example 1 and will not be described again here.
Comparative example 2
This comparative example differs from example 1 in that: this comparative example 1 used a medium petrochemical Yanshan LDPE100-AC to replace the ethylene acrylate rubber of example 1. The remainder of this comparative example is the same as example 1 and will not be described again here.
After the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material tablets of examples 1-4 and comparative examples 1-2 are subjected to irradiation crosslinking by high-energy electron beams with a dose of 12Mrad, the test results are as follows:
the liquid resistance measurements in the above table are: the heat shrinkable tubes prepared from the flame-retardant, oil-resistant and mildew-proof elastomer heat shrinkable tube materials of examples 1 to 4 and comparative examples 1 to 2 were respectively soaked in five liquids: IRM903 gasoline; no. 15 hydraulic oil (GJB 1177 and 1991 petroleum-based aviation hydraulic oil); lubricating oil No. 8 (GB 439-; 5% NaCl solution; the aircraft antifreeze liquid (GB/T20856-2007 type ISO I type of aircraft deicing and anti-icing liquid, the puncture strength is still more than 12kv/mm after the liquid resistance (23 ℃, 24hrs) test of examples 1-4, the test method is ASTMD 2671, the test tensile strength is more than 12MPa, the elongation at break is more than 250%, the determination method is ASTM D638, and the tensile strength of comparative example 1 is more than 11MPa, the elongation at break is less than 230%, the tensile strength of comparative example 2 is less than 10.4MPa, and the elongation at break is less than 210% after the liquid resistance (23 ℃, 24hrs) test of comparative example 1-2.
The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material prepared by the invention has excellent flame retardance, oil resistance and mildew-proof effect, excellent mechanical property and high and low temperature resistance, and excellent comprehensive performance. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube master batch is simple and efficient, is convenient to operate and control, is beneficial to industrial production, and has stable product performance.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material is characterized in that: the feed comprises the following raw materials in parts by weight:
20-40 parts of thermoplastic polyester elastomer
15-30 parts of ethylene acrylate rubber
20-35 parts of composite flame retardant
8-15 parts of compatilizer
3-5 parts of color master batch
0.5-2 parts of antioxidant
0.3-1.5 parts of mildew preventive
0-10 parts of acrylate rubber.
2. The flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material as claimed in claim 1, wherein: the antioxidant is at least one of antioxidant DSTP, antioxidant DNP, antioxidant 1010, antioxidant 1024 and antioxidant BHT.
3. The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material and the preparation method thereof according to claim 1, characterized in that: the compatilizer is at least one of maleic anhydride grafted ethylene-octene copolymer, ethylene-acrylate-glycidyl acrylate terpolymer and maleic anhydride-ethylene-acrylate terpolymer.
4. The flame-retardant oil-resistant mildew-proof elastomer heat-shrinkable tube material and the preparation method thereof according to claim 1, characterized in that: the mildew preventive is at least one of a silver ion antibacterial agent, a zinc-silver ion composite antibacterial agent and an isothiazolinone antibacterial agent.
5. The flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material as claimed in claim 1, wherein: the preparation method of the color master batch comprises the following steps: uniformly mixing 60-70 parts of carrier resin, 5-9 parts of pigment powder, 4-7 parts of dispersing agent and 8-15 parts of synergistic auxiliary agent in parts by weight to form a mixture; then a double-screw extruder is adopted to perform blending extrusion granulation and drying at the temperature of 150 plus 190 ℃ to prepare the color master batch.
6. The flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material as claimed in claim 5, wherein: the carrier resin consists of LLDPE resin and EBA resin according to the weight ratio of 2-3: 1.
7. The flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material as claimed in claim 5, wherein: the dispersing agent is at least one of polyethylene wax and stearate.
8. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
(1) adding the raw materials into a high-speed mixer according to a proportion and uniformly mixing to obtain a mixture;
(2) and adding the obtained mixture into a double-screw extruder, and performing melt extrusion granulation to obtain the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material master batch.
9. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material according to claim 8, characterized in that: in the step (1), the mixing temperature is 60-80 ℃, the rotating speed of the high-speed mixer is 500-800r/min, and the mixing time is 15-30 min.
10. The preparation method of the flame-retardant, oil-resistant and mildew-proof elastomer heat-shrinkable tube material according to claim 8, characterized in that: in the step (2), the six-interval temperature of the double-screw extruder is respectively as follows: the first region 110-.
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| CN112226049B (en) | 2023-07-21 |
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