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CN-122011662-A - Halogen-free flame-retardant TPE cable material and preparation method thereof

CN122011662ACN 122011662 ACN122011662 ACN 122011662ACN-122011662-A

Abstract

The invention relates to a halogen-free flame-retardant TPE cable material and a preparation method thereof, wherein the halogen-free flame-retardant TPE cable material comprises, by weight, 10-30 parts of SEBS, 5-15 parts of white oil, 5-20 parts of PP, 15-30 parts of halogen-free flame retardant, 5-15 parts of char forming agent, 5-10 parts of compatilizer, 0.3-1 part of dispersing agent and 2-5 parts of antioxidant, and the char forming agent is formed by mixing hydrated zinc borate and low-temperature glass powder according to a mass ratio of 4:1-2. By adopting the specific char forming agent to match with other components, the production cost is reduced to a certain extent, meanwhile, the generation of smoke during material combustion is reduced, and the V-0 flame retardant requirement can be met.

Inventors

  • GONG JIANJUN
  • ZHU HUAZHU
  • YUAN BAO
  • ZHANG KUN

Assignees

  • 安徽滁州德威新材料有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. The halogen-free flame-retardant TPE cable material is characterized by comprising the following raw material components in parts by weight: 10-30 parts of SEBS; 5-15 parts of white oil; 5-20 parts of PP; 15-30 parts of halogen-free flame retardant; 5-15 parts of a char forming agent; 5-10 parts of a compatilizer; 0.3-1 parts of a dispersing agent; 2-5 parts of an antioxidant; The char forming agent is formed by mixing hydrated zinc borate and low-temperature glass powder according to the mass ratio of 4:1-2.
  2. 2. The halogen-free flame retardant TPE cable material of claim 1, wherein the styrene content of the SEBS is 31-35%.
  3. 3. The halogen-free flame-retardant TPE cable material according to claim 1, wherein the white oil has a kinematic viscosity of 61.2-74.8 mm 2 /s at 40 ℃ and a flash point of more than or equal to 200 ℃.
  4. 4. The halogen-free flame-retardant TPE cable material of claim 1, wherein the halogen-free flame retardant is a mixture of melamine cyanurate and diethyl aluminum hypophosphite according to a mass ratio of 1:1-3.
  5. 5. The halogen-free flame-retardant TPE cable material according to claim 1, wherein the PP is a homopolymerized polypropylene resin, and the melt index is 3.0+/-0.5 g/10min (230 ℃ C./2.16 kg).
  6. 6. The halogen-free flame-retardant TPE cable material of claim 1, wherein the compatilizer is maleic anhydride grafted SEBS, and the grafting rate is 1.4-2.0%.
  7. 7. The halogen-free flame retardant TPE cable material of claim 1, wherein the dispersant is a polysilicone.
  8. 8. The halogen-free flame retardant TPE cable material of claim 1, wherein the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2.
  9. 9. The method for preparing the halogen-free flame retardant TPE cable material according to any one of claims 1 to 8, which is characterized by comprising the following steps: adding the SEBS and the white oil in the formula amount into a high-speed stirrer, and stirring until the SEBS completely absorbs the white oil; adding the PP, the halogen-free flame retardant, the char forming agent, the compatilizer, the dispersing agent and the antioxidant in the formula amount into a high-speed stirrer for uniform stirring; And (3) putting the uniformly stirred product into an internal mixer, banburying at 150-200 ℃, and then putting into a double-screw extruder, and granulating by air cooling.
  10. 10. The method for preparing the halogen-free flame retardant TPE cable material according to claim 9, wherein the temperature of each zone of the twin-screw extruder is as follows: the first region 160-170 ℃, the second region 170-180 ℃, the third region 180-190 ℃, the fourth region 190-200 ℃, the fifth region 190-200 ℃, the sixth region 190-200 ℃, the seventh region 190-200 ℃, the eighth region 190-200 ℃, the ninth region 190-200 ℃, the tenth region 190-200 ℃, the eleventh region 180-190 ℃ and the head region 170-180 ℃.

Description

Halogen-free flame-retardant TPE cable material and preparation method thereof Technical Field The invention belongs to the technical field of cable materials, relates to a TPE cable material, and in particular relates to a halogen-free flame-retardant TPE cable material and a preparation method thereof. Background Most of the existing halogen-free flame-retardant TPE cable materials use polyphenyl ether as a char-forming agent. The invention discloses a halogen-free flame-retardant TPE cable material and a preparation method thereof, wherein the halogen-free flame-retardant TPE cable material comprises, by weight, 20-30 parts of elastomer resin, 10-30 parts of plasticizer, 10-20 parts of polypropylene, 3-8 parts of compatilizer, 3-8 parts of polar resin, 25-35 parts of flame retardant, 5-15 parts of charring agent, 0.2-0.5 part of antioxidant and 0.5-1.5 parts of lubricant. The char-forming agent in this application comprises any one or a combination of at least two of a polyphenylene ether resin, a triazine char-forming agent and piperazine pyrophosphate. However, the polyphenyl ether has high processing difficulty, is easy to stress crack, cannot be directly used as a component to be put into material production, needs to be firstly blended and modified with an elastomer, increases production load, and has high aromaticity, and the main chain of the polyphenyl ether is formed by connecting a plurality of benzene rings through oxygen bridges, so that the polyphenyl ether is often polluted by ‌ thick black smoke during combustion. Disclosure of Invention In view of the shortcomings of the prior art routes, the invention aims to provide a halogen-free flame-retardant TPE cable material. In order to achieve the purpose, the invention provides a halogen-free flame-retardant TPE cable material, which comprises the following raw material components in parts by weight: 10-30 parts of SEBS; 5-15 parts of white oil; 5-20 parts of PP; 15-30 parts of halogen-free flame retardant; 5-15 parts of a char forming agent; 5-10 parts of a compatilizer; 0.3-1 parts of a dispersing agent; 2-5 parts of an antioxidant; The char forming agent is formed by mixing hydrated zinc borate and low-temperature glass powder according to the mass ratio of 4:1-2. Optimally, the styrene content of the SEBS is 31-35%. Optimally, the kinematic viscosity of the white oil at 40 ℃ is 61.2-74.8 mm 2/s, and the flash point is more than or equal to 200 ℃. Optimally, the halogen-free flame retardant is a mixture of melamine cyanurate and diethyl aluminum hypophosphite according to a mass ratio of 1:1-3. Optimally, the PP is a homo-polypropylene resin with a melt index of 3.0+ -0.5 g/10min (230 ℃ C./2.16 kg). Optimally, the compatilizer is maleic anhydride grafted SEBS, and the grafting rate is 1.4-2.0%. Optimally, the dispersant is a polysilicone. Optimally, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168 according to a mass ratio of 1:2. The invention also aims to provide a preparation method of the halogen-free flame-retardant TPE cable material, which comprises the following steps: adding the SEBS and the white oil in the formula amount into a high-speed stirrer, and stirring until the SEBS completely absorbs the white oil; adding the PP, the halogen-free flame retardant, the char forming agent, the compatilizer, the dispersing agent and the antioxidant in the formula amount into a high-speed stirrer for uniform stirring; And (3) putting the uniformly stirred product into an internal mixer, banburying at 150-200 ℃, and then putting into a double-screw extruder, and granulating by air cooling. Optimally, the temperatures of the zones of the twin-screw extruder are 160-170 ℃, 170-180 ℃, 180-190 ℃ in the third zone, 190-200 ℃ in the fourth zone, 190-200 ℃ in the fifth zone, 190-200 ℃ in the sixth zone, 190-200 ℃ in the eighth zone, 190-200 ℃ in the ninth zone, 190-200 ℃ in the tenth zone, 180-190 ℃ in the eleventh zone and 170-180 ℃ in the head zone. Compared with the prior art, the halogen-free flame-retardant TPE cable material has the advantages that the specific char forming agent is adopted to be matched with other components, so that the production cost is reduced to a certain extent, the generation of smoke during material combustion is reduced, and the V-0 flame-retardant requirement can be met. Detailed Description The halogen-free flame-retardant TPE cable material comprises, by weight, 10-30 parts of SEBS, 5-15 parts of white oil, 5-20 parts of PP, 15-30 parts of halogen-free flame retardant, 5-15 parts of char former, 5-10 parts of compatilizer, 0.3-1 part of dispersing agent and 2-5 parts of antioxidant, wherein the char former is formed by mixing hydrated zinc borate and low-temperature glass powder according to a mass ratio of 4:1-2. By adopting the specific char forming agent to match with other components, the production cost is reduced to a certain extent, meanwhile, the generation of smoke during material comb