CN116396583A - Halogen-free flame-retardant TPE cable material and preparation method thereof - Google Patents

Halogen-free flame-retardant TPE cable material and preparation method thereof Download PDF

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CN116396583A
CN116396583A CN202310483742.3A CN202310483742A CN116396583A CN 116396583 A CN116396583 A CN 116396583A CN 202310483742 A CN202310483742 A CN 202310483742A CN 116396583 A CN116396583 A CN 116396583A
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parts
halogen
resin
cable material
free flame
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肖崇
詹敏
郑东升
田建军
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ASAP Technology Jiangxi Co Ltd
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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
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
    • C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
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Abstract

The invention provides a halogen-free flame-retardant TPE cable material and a preparation method thereof. The halogen-free flame-retardant TPE cable material comprises the following components in parts 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 char forming agent, 0.2-0.5 part of antioxidant and 0.5-1.5 part of lubricant. The halogen-free flame-retardant TPE cable material provided by the invention can improve the compatibility of resin and halogen-free flame retardant in the TPE cable material under the condition of keeping the physical properties unchanged basically, thereby improving the abnormal accumulation of ocular mold slag in the wire extrusion process.

Description

Halogen-free flame-retardant TPE cable material and preparation method thereof
Technical Field
The invention belongs to the technical field of composite materials, and relates to a cable material, in particular to a halogen-free flame-retardant TPE (thermoplastic elastomer) cable material and a preparation method thereof.
Background
The traditional PVC and bromine-containing flame-retardant wires and cables and the electronic connectors are accelerated to the house information of personnel in a fire scene and increase the rescue difficulty of rescue personnel because of the occurrence of cancerogenic dioxin and the generation of a large amount of toxic dense smoke and corrosive gas in the combustion process; the released corrosive gas can corrode the electric appliances on the fire scene and nearby to be scrapped; in addition, halogen-based flame retardants have toxicity build-up and carcinogenic generation during production, transportation, storage, use, and recovery of waste products. All this makes the market urgently need a novel flame-retardant material which is environment-friendly, low in smoke quantity, halogen-free and corrosion-free.
However, in practical application, when a wire is extruded and molded, abnormal molding slag accumulation of an eye is very easy to occur due to the compatibility problem of a halogen-free flame retardant and resin, and abnormal conditions such as adhesion of foreign matters, scratches and the like are caused on the surface of the wire. At present, the common method for solving the problem of abnormal accumulated slag of the eye mould is to blow off the accumulated slag at the eye mould mouth by using a wind gun, but occasionally, part of the accumulated slag is not blown clean, so that the quality of wires is abnormal, and the problem of abnormal accumulated slag of the eye mould cannot be solved fundamentally.
CN 103804835a discloses a halogen-free flame retardant thermoplastic elastomer cable material and a preparation method thereof, wherein the halogen-free flame retardant thermoplastic elastomer cable material comprises the following components in parts by weight: 20-70 parts of styrene elastomer, 10-30 parts of polyphenyl ether resin, 10-30 parts of polyolefin resin, 5-20 parts of organic hypophosphite and 20-40 parts of nitrogen-phosphorus flame retardant. Although the cable material provided by the patent solves the problem that the material contains halogen elements, the problem of abnormal eye mould is not solved.
In consideration of the defects of the halogen-free flame-retardant TPE cable material in the prior art, the invention provides the TPE cable material which can solve the problem of abnormal slag accumulation of a wire extrusion eye mould under the condition of keeping the physical properties unchanged basically.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a halogen-free flame-retardant TPE cable material and a preparation method thereof. The halogen-free flame-retardant TPE cable material can improve the compatibility of resin and halogen-free flame retardant in the TPE cable material under the condition of keeping the physical properties unchanged basically, thereby improving the abnormal accumulation of the eye mold slag in the wire extrusion process.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a halogen-free flame-retardant TPE cable material, which comprises the following components in parts 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 char forming agent, 0.2-0.5 part of antioxidant and 0.5-1.5 part of lubricant.
The halogen-free flame-retardant TPE cable material disclosed by the invention is an environment-friendly and nontoxic raw material, can be recycled by 100%, and has the advantages of clean and efficient production mode and no pollution to the environment.
The halogen-free flame-retardant TPE cable material can improve the compatibility of resin and halogen-free flame retardant in the TPE cable material by adding the polar resin material under the condition of keeping the physical properties unchanged basically, thereby improving the abnormal ocular mold slag accumulation in the wire extrusion process.
Illustratively, the elastomer-based resin may be 20 to 30 parts by weight, for example, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts or 30 parts, but is not limited to the recited values, and other non-recited values within the range of values are equally applicable; the plasticizer may be 10 to 30 parts by weight, for example, 10 parts, 14 parts, 18 parts, 22 parts, 26 parts or 30 parts, but is not limited to the recited values, and other non-recited values in the range of values are equally applicable; the polypropylene may be 10 to 20 parts by weight, for example, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts or 20 parts, but is not limited to the recited values, and other non-recited values in the range of values are equally applicable; the weight part of the compatilizer is 3-8 parts, for example, 3 parts, 5 parts, 7 parts or 8 parts, but is not limited to the listed values, and other non-listed values in the range of values are equally applicable; the polar resin may be 3 to 8 parts by weight, for example, 3 parts, 5 parts, 7 parts or 8 parts, but not limited to the recited values, and other non-recited values in the range of values are equally applicable; the weight part of the flame retardant is 25 to 35 parts, for example, 25 parts, 27 parts, 29 parts, 31 parts, 33 parts or 35 parts, but the flame retardant is not limited to the listed values, and other non-listed values in the numerical range are equally applicable; the char-forming agent may be 5 to 15 parts by weight, for example, 5 parts, 7 parts, 9 parts, 11 parts, 13 parts or 15 parts, but not limited to the values recited, and other values not recited in the numerical range are equally applicable; the antioxidant may be 0.2 to 0.5 parts by weight, for example, 0.2 parts, 0.3 parts, 0.4 parts or 0.5 parts, but is not limited to the recited values, and other values not recited in the numerical range are equally applicable; the lubricant may be used in an amount of 0.5 to 1.5 parts by weight, for example, 0.5 parts, 0.7 parts, 0.9 parts, 1.1 parts, 1.3 parts, and 1.5 parts, but the present invention is not limited to the values recited, and other values not recited in the numerical range are equally applicable.
As a preferred embodiment of the present invention, the elastomer-based resin includes a hydrogenated styrene-butadiene-styrene block copolymer.
Preferably, the weight average molecular weight of the elastomer-based resin is 100000 ～ 150000, and may be 100000, 110000, 120000, 130000, 140000 or 150000, for example, but not limited to the values recited, and other values not recited in the numerical range are equally applicable.
As a preferred embodiment of the present invention, the plasticizer includes white oil.
Preferably, the kinematic viscosity of the white oil at 25 ℃ is 150-300 mm 2 S, which may be 150mm, for example 2 /s、180mm 2 /s、210mm 2 /s、240mm 2 /s、270mm 2 /s or 300mm 2 S, but not limited to, the values recited, within the range of valuesOther values not recited are equally applicable.
The kinematic viscosity of the plasticizer disclosed by the invention can influence the oil separation and processing performance, so that the viscosity of a cable material is high due to the fact that the kinematic viscosity of the plasticizer is too high, plasticizing is difficult, particles are easy to generate, and the oil separation of the cable material is easy due to the fact that the kinematic viscosity of the plasticizer is too small.
As a preferable embodiment of the present invention, the polypropylene is a copolymer polypropylene having a melt index of 3-10g/10min, and the melt index of the copolymer polypropylene may be, for example, 3g/10min, 4g/10min, 5g/10min, 6g/10min, 7g/10min, 8g/10min, 9g/10min or 10g/10min, but is not limited to the values listed, and other values not listed in the numerical range are equally applicable.
As a preferred embodiment of the present invention, the compatibilizing agent comprises a graft resin.
Preferably, the grafting resin comprises a maleic anhydride grafting resin.
The graft ratio of the graft resin is preferably 1.0 to 1.8%, and may be, for example, 1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7% or 1.8%, but is not limited to the values recited, and other values not recited in the numerical range are equally applicable.
Preferably, the melt index of the graft resin is 0.3 to 1.5g/10min, and may be, for example, 0.3g/10min, 0.5g/10min, 0.7g/10min, 0.9g/10min, 1.1g/10min, 1.3g/10min, or 1.5g/10min, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
The grafting rate of the compatilizer can influence the tensile strength and the elongation at break of the cable material, and too large grafting rate can lead to the increase of the tensile strength of the cable material, but too small elongation at break can lead to the decrease of the tensile strength.
As a preferred embodiment of the present invention, the polar resin includes a polyamide hot melt resin.
The softening point of the polyamide hot melt resin is preferably 110 to 130 ℃, and may be 110 ℃, 115 ℃, 120 ℃, 125 ℃, or 130 ℃, for example, but the softening point is not limited to the above-mentioned values, and other values not mentioned in the numerical range are applicable.
Preferably, the viscosity of the polyamide hot melt resin at 200 ℃ is 3000-4500 cps, for example, 3000cps, 3300cps, 3600cps, 3900cps, 4200cps or 4500cps, but not limited to the recited values, other non-recited values within the range of values are equally applicable.
The viscosity of the polyamide hot melt adhesive resin is 3000-4500 cps at 200 ℃, and the viscosity is too small, so that the compatibility of the flame retardant and the resin is reduced; too high a viscosity increases the difficulty of processing and plasticizing.
The compatibility of the resin and the flame retardant in the TPE cable material can be improved by adding the polyamide hot melt adhesive resin, and the action mechanism is as follows: the polar group and the flame retardant generate good bonding force, so that a good coating effect is achieved on the flame retardant, and the compatibility with resin is improved. In addition, the polyamide hot melt adhesive resin also can influence the mechanical properties of the cable material, the too low elongation at break can be caused by the excessive addition amount of the polyamide hot melt adhesive resin, the compatibility of the flame retardant can be influenced by the too low elongation at break, and the slag accumulation phenomenon is easy to generate during wire extrusion.
As a preferred embodiment of the present invention, the flame retardant comprises a first component and a second component.
Preferably, the mass ratio of the first component to the second component is 1 (1-3), for example, it may be 1:1, 1:1.4, 1:1.8, 1:2.2, 1:2.6 or 1:3, but not limited to the recited values, and other non-recited values within the range of values are equally applicable.
Preferably, the first component comprises melamine cyanurate and/or melamine pyrophosphate.
Preferably, the second component comprises any one or a combination of at least two of diethyl aluminum phosphinate, phenyl aluminum phosphinate, and aluminum phosphite, typically, but not limited to, including: a combination of aluminum diethylphosphinate and aluminum hypophosphite, a combination of aluminum hypophosphite, aluminum phenylphosphinate and phosphorous acid, or a combination of aluminum diethylphosphinate, aluminum hypophosphite, aluminum phenylphosphinate and aluminum phosphorous acid.
The first component and the second component in the flame retardant supplement each other, and the first component and the second component achieve the aim of halogen-free flame retardance through synergistic effect, wherein the mass ratio of the first component to the second component is 1 (1-3), and the content of the first component is too high or too low, so that the flame retardance is reduced.
As a preferred embodiment of the present invention, the char-forming agent comprises any one or a combination of at least two of polyphenylene ether resin, triazine char-forming agent and piperazine pyrophosphate, and typical but non-limiting combinations include: a combination of a triazine char-forming agent and piperazine pyrophosphate, a combination of a polyphenylene ether resin and a triazine char-forming agent, a combination of a polyphenylene ether resin and piperazine pyrophosphate, or a combination of a polyphenylene ether resin, a triazine char-forming agent, and piperazine pyrophosphate.
Preferably, the antioxidants include any one or a combination of at least two of antioxidant 1010, antioxidant 618, antioxidant 1076, and antioxidant 412S, typically, but not limited to, including: a combination of antioxidant 1010 and antioxidant 618, a combination of antioxidant 1010, antioxidant 618 and antioxidant 1076, or a combination of antioxidant 1010, antioxidant 618, antioxidant 1076 and antioxidant 412S.
It is worth noting that the chinese name of the antioxidant 1076 is: n-stearyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate; the chinese name of the antioxidant 618 is: pentaerythritol dioctadecyl phosphite; the Chinese name of the antioxidant 1010 is: pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ]; the chinese name of the antioxidant 412S is: pentaerythritol tetrakis (3-laurylthiopropionate).
Preferably, the lubricant comprises silicone powder or silicone master batch.
Preferably, the silicone content in the lubricant is greater than or equal to 50%, such as 50%, 60%, 70%, 80% or 90%, but not limited to the recited values, and other values not recited in the range of values are equally applicable.
In a second aspect, the present invention provides a method for preparing the halogen-free flame retardant TPE cable material as provided in the first aspect, the method comprising the steps of:
and stirring and mixing elastomer resin, plasticizer, polypropylene, compatilizer, polar resin, flame retardant, char forming agent, antioxidant and lubricant according to the formula amount, extruding and plasticizing after stirring, and then bracing, water-cooling, air-drying, granulating and packaging through a double-screw eye mould to obtain the halogen-free flame-retardant TPE cable material.
In a preferred embodiment of the present invention, the stirring time is 20 to 30 minutes, for example, 20 minutes, 22 minutes, 24 minutes, 26 minutes, 28 minutes or 30 minutes, but the stirring time is not limited to the recited values, and other values not recited in the numerical range are equally applicable.
Preferably, the extrusion and plasticization employ a twin screw machine.
Preferably, the extrusion temperature is 180 to 220 ℃, for example, 180 ℃, 190 ℃, 200 ℃, 210 ℃ or 220 ℃, but not limited to the recited values, and other values not recited in the numerical range are equally applicable.
The numerical ranges recited herein include not only the above-listed point values, but also any point values between the above-listed numerical ranges that are not listed, and are limited in space and for the sake of brevity, the present invention is not intended to be exhaustive of the specific point values that the stated ranges include.
Compared with the prior art, the invention has the beneficial effects that:
(1) Under the condition of keeping the physical properties unchanged basically, the compatibility of the resin and the halogen-free flame retardant in the TPE cable material is improved by adding the polar resin, so that the problem of abnormal accumulated slag of the eye mould in the wire extrusion process is solved, and the wire extrusion efficiency and quality are greatly improved;
(2) The halogen-free flame-retardant TPE cable material provided by the invention has relatively good tensile strength and elongation at break;
(3) The flame retardant property of the halogen-free flame retardant TPE cable material provided by the invention meets the UL 94V-0 standard test.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
The embodiment provides a halogen-free flame-retardant TPE cable material, which comprises the following components in parts by weight:
26 parts of hydrogenated styrene-butadiene-styrene block copolymer, 15 parts of white oil, 12 parts of polypropylene, 5 parts of maleic anhydride graft resin, 8 parts of polyamide hot melt adhesive resin, 30 parts of flame retardant, 10 parts of char forming agent, 0.5 part of antioxidant and 1.5 parts of lubricant.
Wherein the hydrogenated styrene-butadiene-styrene block copolymer has a weight average molecular weight of 100000 ～ 150000; the kinematic viscosity of the white oil at 25 ℃ is 200mm 2 S; the melt index of the polypropylene is 8g/10min; the grafting rate of the maleic anhydride grafted resin is 1.2%, and the melt index is 1.2g/10min; the softening point of the polyamide hot melt adhesive resin is 120 ℃, and the viscosity of the polyamide hot melt adhesive resin at 200 ℃ is 4000cps; the flame retardant comprises a first component and a second component in a mass ratio of 1:2, wherein the first component is a mixture of melamine cyanurate and melamine pyrophosphate, and the second component is diethyl aluminum phosphinate; the char-forming agent is piperazine pyrophosphate; the antioxidant is antioxidant 1010; the lubricant is silicone powder with the silicone effective content more than or equal to 50%.
The preparation method of the halogen-free flame-retardant TPE cable material comprises the following steps: stirring and mixing elastomer resin, plasticizer, polypropylene, compatilizer, polar resin, flame retardant, char forming agent, antioxidant and lubricant according to the formula amount, extruding and plasticizing by adopting a double-screw machine after stirring for 25min, and then bracing, water-cooling, air-drying, granulating and packaging by adopting a double-screw eye mould to obtain the halogen-free flame-retardant TPE cable material;
wherein the extrusion temperature is 200 ℃.
Example 2
The embodiment provides a halogen-free flame-retardant TPE cable material, which comprises the following components in parts by weight:
20 parts of hydrogenated styrene-butadiene-styrene block copolymer, 30 parts of white oil, 20 parts of polypropylene, 8 parts of maleic anhydride graft resin, 8 parts of polyamide hot melt adhesive resin, 35 parts of flame retardant, 15 parts of char forming agent, 0.5 part of antioxidant and 1.5 parts of lubricant.
Wherein the weight average molecular weight of the elastomer-based resin is 100000 ～ 150000; the kinematic viscosity of the white oil at 25 ℃ is 300mm 2 S; the melt index of the polypropylene is 10g/10min; the grafting rate of the maleic anhydride grafted resin is 1.0%, and the melt index is 1.5g/10min; the softening point of the polyamide hot melt adhesive resin is 120 ℃, and the viscosity of the polyamide hot melt adhesive resin at 200 ℃ is 3000cps; the flame retardant comprises a first component and a second component in a mass ratio of 1:1, wherein the first component is melamine cyanurate, and the second component is a combination of aluminum hypophosphite, aluminum phenyl hypophosphite and aluminum phosphite; the charring agent is triazine charring agent; the antioxidant is antioxidant 412S; the lubricant comprises silicone master batches with the silicone effective content of more than or equal to 50 percent.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 3
The embodiment provides a halogen-free flame-retardant TPE cable material, which comprises the following components in parts by weight:
30 parts of hydrogenated styrene-butadiene-styrene block copolymer, 10 parts of white oil, 10 parts of polypropylene, 3 parts of maleic anhydride graft resin, 8 parts of polyamide hot melt adhesive resin, 25 parts of flame retardant, 5 parts of char forming agent, 0.2 part of antioxidant and 0.5 part of lubricant.
Wherein the weight average molecular weight of the elastomer-based resin is 100000 ～ 150000; the kinematic viscosity of the white oil at 25 ℃ is 150mm 2 S; the melt index of the polypropylene is 3g/10min; the grafting rate of the maleic anhydride grafted resin is 1.8%, and the melt index is 0.3g/10min; the softening point of the polyamide hot melt adhesive resin is 120 ℃, and the viscosity of the polyamide hot melt adhesive resin at 200 ℃ is 4500cps; the flame retardant comprises a first component and a second component in a mass ratio of 1:3, wherein the first component is a mixture of melamine cyanurate and melamine pyrophosphate, and the second component is a mixture of melamine cyanurate and melamine pyrophosphateThe component is phenyl aluminum hypophosphite; the char forming agent is polyphenyl ether resin; the antioxidant is a combination of antioxidant 1010, antioxidant 618 and antioxidant; the lubricant is silicone powder with the silicone effective content more than or equal to 50%.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 4
The present embodiment provides a halogen-free flame retardant TPE cable material, which differs from embodiment 1 only in that:
the present example changed the weight part of the polar resin to 3 parts.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 5
The present embodiment provides a halogen-free flame retardant TPE cable material, which differs from embodiment 1 only in that:
the present example changes the weight part of the polar resin to 5 parts.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 6
The present embodiment provides a halogen-free flame retardant TPE cable material, which differs from embodiment 1 only in that:
in this example, the mass ratio of the first component to the second component in the flame retardant was changed to 1:4.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 7
The present embodiment provides a halogen-free flame retardant TPE cable material, which differs from embodiment 1 only in that:
in this example, the mass ratio of the first component to the second component in the flame retardant was changed to 1:0.5.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 8
The present embodiment provides a halogen-free flame retardant TPE cable material, which differs from embodiment 1 only in that:
the grafting ratio of the phase agent was changed to 2.0% in this example.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Example 9
The present embodiment provides a halogen-free flame retardant TPE cable material, which differs from embodiment 1 only in that:
the grafting ratio of the phase agent was changed to 0.8% in this example.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Comparative example 1
This comparative example provides a halogen-free flame retardant TPE cable material which differs from example 1 only in that:
the comparative example was changed to 10 parts by weight of the polar resin.
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
Comparative example 2
This comparative example provides a halogen-free flame retardant TPE cable material which differs from example 1 only in that:
the comparative example changes the weight part of the polar resin to 0 part
The preparation method of the halogen-free flame-retardant TPE cable material is the same as that of the example 1.
And (3) performance detection:
the halogen-free flame retardant TPE cable materials provided in examples 1-10 and comparative examples 1-2 were subjected to mechanical property detection, flame retardant property detection and analysis of the condition of eye mold slag accumulation, and the detection results are shown in Table 1.
And (3) detecting the mechanical properties: tensile elongation ability was tested according to UL 1581;
the flame retardant property detects: the thickness of the test strip is 1.6mm according to the UL 94V-0 standard test;
and (3) analyzing the condition of ocular mold slag accumulation: the eye mold slag was deposited by extruding a wire rod having a diameter of 4.0mm and a coating thickness of 0.5mm at a wire speed of 80 m/min, and observing the condition of the eye mold slag after the wire rod was extruded for 30 minutes.
TABLE 1
Figure BDA0004208135770000121
As can be seen from Table 1, the addition amount of the polar resin affects the mechanical properties of the cable material and the condition of mold deposit by analyzing examples 1, 4 to 5 and comparative examples 1 to 2.
In summary, the halogen-free flame-retardant TPE cable material provided by the invention can improve the compatibility of resin and halogen-free flame retardant in the TPE cable material under the condition of keeping the physical properties unchanged basically, thereby improving the abnormal accumulation of ocular mold slag in the wire extrusion process.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.

Claims (10)

1. The halogen-free flame-retardant TPE cable material is characterized by comprising the following components in parts 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 char forming agent, 0.2-0.5 part of antioxidant and 0.5-1.5 part of lubricant.
2. The halogen-free flame retardant TPE cable material according to claim 1, wherein the elastomeric-based resin comprises a hydrogenated styrene-butadiene-styrene block copolymer;
preferably, the weight average molecular weight of the elastomeric resin is 100000 ～ 150000.
3. The halogen-free flame retardant TPE cable material according to claim 1 or 2, wherein the plasticizer comprises white oil;
preferably, the kinematic viscosity of the white oil at 25 ℃ is 150-300 mm 2 /s。
4. A halogen-free flame retardant TPE cable material according to any one of claims 1-3, wherein the polypropylene is a co-polymerized polypropylene having a melt index of 3-10g/10 min.
5. The halogen-free flame retardant TPE cable material according to any one of claims 1-4, wherein the compatibilizer comprises a grafted resin;
preferably, the grafting resin comprises maleic anhydride grafting resin;
preferably, the grafting ratio of the grafting resin is 1.0-1.8%;
preferably, the melt index of the graft resin is 0.3-1.5g/10min.
6. The halogen-free flame retardant TPE cable material according to any one of claims 1-5, wherein the polar resin comprises a polyamide hot melt resin;
preferably, the softening point of the polyamide hot melt adhesive resin is 110-130 ℃;
preferably, the viscosity of the polyamide hot melt adhesive resin is 3000-4500 cps at 200 ℃.
7. The halogen-free flame retardant TPE cable material according to any one of claims 1-6, wherein the flame retardant comprises a first component and a second component;
preferably, the mass ratio of the first component to the second component is 1 (1-3);
preferably, the first component comprises melamine cyanurate and/or melamine pyrophosphate;
preferably, the second component comprises any one or a combination of at least two of diethyl aluminum phosphinate, phenyl aluminum phosphinate and aluminum phosphite.
8. The halogen-free flame retardant TPE cable material according to any one of claims 1-7, wherein the char-forming agent comprises any one or a combination of at least two of polyphenylene ether resin, triazine char-forming agent and piperazine pyrophosphate;
preferably, the antioxidant comprises any one or a combination of at least two of antioxidant 1010, antioxidant 618, antioxidant 1076 and antioxidant 412S;
preferably, the lubricant comprises silicone powder or silicone master batch;
preferably, the silicone content of the lubricant is greater than or equal to 50%.
9. A method for preparing the halogen-free flame retardant TPE cable material according to any one of claims 1-8, comprising the steps of:
and stirring and mixing elastomer resin, plasticizer, polypropylene, compatilizer, polar resin, flame retardant, char forming agent, antioxidant and lubricant according to the formula amount, extruding and plasticizing after stirring, and then bracing, water-cooling, air-drying, granulating and packaging through a double-screw eye mould to obtain the halogen-free flame-retardant TPE cable material.
10. The method according to claim 9, wherein the stirring time is 20 to 30 minutes;
preferably, the extrusion and plasticization employ a twin screw machine;
preferably, the extrusion temperature is 180-220 ℃.
CN202310483742.3A 2023-04-28 2023-04-28 Halogen-free flame-retardant TPE cable material and preparation method thereof Pending CN116396583A (en)

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