CN111205511B - Intumescent flame retardant composition, preparation and application thereof - Google Patents

Intumescent flame retardant composition, preparation and application thereof Download PDF

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CN111205511B
CN111205511B CN202010158585.5A CN202010158585A CN111205511B CN 111205511 B CN111205511 B CN 111205511B CN 202010158585 A CN202010158585 A CN 202010158585A CN 111205511 B CN111205511 B CN 111205511B
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source component
flame retardant
molecular weight
parts
retardant composition
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CN111205511A (en
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田中山
赖少川
许少新
张晨
杨文�
李苗
周世骏
余吕宏
钱玉英
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China Petroleum and Chemical Corp
Guangzhou Huaxinke Intelligent Manufacturing Technology Co Ltd
China Oil and Gas Pipeline Network Corp
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China Petroleum and Chemical Corp
Sinopec Sales Co Ltd South China Branch
Guangzhou Huaxinke Intelligent Manufacturing Technology Co Ltd
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    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
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    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
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    • C08K5/34922—Melamine; Derivatives thereof
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    • 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
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Abstract

The invention relates to an intumescent flame retardant composition, and preparation and application thereof. The preparation raw materials of the intumescent flame-retardant composition comprise the following components in parts by mass: 1-5 parts of an acid source component, 1-13 parts of a carbon source component and 1-16 parts of a gas source component; the acid source component comprises melamine phosphate and comprises at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate, and alkyl phosphate esters. The invention matches the melamine phosphate with at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate and alkyl phosphate to form a compound acid source, and forms a flame retardant formula together with the acid source, a carbon source component and an air source component.

Description

Intumescent flame retardant composition, preparation and application thereof
Technical Field
The invention belongs to the technical field of polymers, and particularly relates to an intumescent flame retardant composition, and preparation and application thereof.
Background
The main hazards to the oil and gas pipelines in service include corrosion outside the pipelines and corrosion inside the pipelines. In contrast to external corrosion, internal corrosion is covert and its presence is often overlooked. Meanwhile, due to the particularity of the conveying medium, the corrosion in the pipeline is very serious and even far exceeds the corrosion outside the pipeline. Statistics show that by 2018, the corrosion perforations of the inner wall of the pipe account for 90% of the total corrosion perforations. In addition to this, the inner wall of the pipe is subject to abrasion by the transport medium. Because of the characteristics and the transportation safety of the finished oil, a plurality of internal anti-corrosion technologies cannot be implemented, and the development of a flame-retardant antistatic material for petrochemical industry is necessary, and the flame-retardant antistatic material has important significance for prolonging the service life of the material by solving the problems of corrosion, abrasion, static fire and the like of pipelines.
At present, the ultra-high molecular weight polyethylene material for the conveying pipeline has a viscosity molecular weight of between 200 and 500 million, and is a common wear-resistant pipeline for conveying small-particle slurry due to excellent impact resistance, self-lubrication, low temperature resistance, wear resistance and chemical resistance. The wear resistance of the ultra-high molecular weight polyethylene material is 4-7 times that of a steel pipe, 3 times that of a common PE pipe and 4 times that of nylon. Meanwhile, the impact strength of the material is the first of various plastics, and is 10 times of that of high-density polyethylene and 6 times of that of nylon. The cracking is difficult to occur no matter the external force is strong impact, or the internal pressure fluctuates and impacts.
However, the above ultra-high molecular weight polyethylene material belongs to a combustible material, and cannot be directly used in a transmission pipeline of oil gas, and therefore, a flame retardant needs to be added to modify the material. Conventional flame retardants are for example: a flame retardant comprising a carbon source, an acid source, a gas source, and an antioxidant; wherein, the antioxidant comprises dioctadecyl pentaerythritol diphosphite and/or hexadecyl pentaerythritol diphosphite, and the carbon source is selected from one or more than two of cellulose fiber, glucose, starch, cane sugar, dextrin, pentaerythritol, glycol and phenolic resin; the acid source is one or more than two of polysilicic acid, phosphoric acid, boric acid, sulfuric acid, phosphate and ammonium phosphate; the gas source is selected from one or more of urea, melamine and polyamide. When the traditional flame retardant is added into an ultra-high molecular weight polyethylene material to modify the material, when the addition amount is 5-15%, the flame retardant effect is poor, the limited oxygen index is less than 21.5, the flame retardant requirement of the material is not met, and the influence on the physical and mechanical properties of the material is small; when the addition amount reaches 15-25%, the limiting oxygen index can reach 22-33, but the physical and mechanical properties are obviously attenuated, the tensile strength and the impact strength are reduced by 50-70%, the bending strength is reduced by 80-90%, and the obtained modified high molecular weight polyethylene material is difficult to meet the requirements of materials for oil and gas pipelines.
Disclosure of Invention
Based on the above, the main object of the present invention is to provide an intumescent flame retardant composition, which has a significant flame retardant effect and good mechanical strength when used as a flame retardant to modify an ultrahigh molecular weight polyethylene material.
The main purpose of the invention is realized by the following technical scheme:
an intumescent flame retardant composition is prepared from the following raw materials in parts by mass: 1-5 parts of an acid source component, 1-13 parts of a carbon source component and 1-16 parts of a gas source component;
the acid source component comprises melamine phosphate and comprises at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate, and alkyl phosphate;
in some embodiments, the intumescent flame retardant composition is prepared from the following raw materials in parts by mass: 2.4-2.9 parts of acid source component, 2.5-6 parts of carbon source component and 4.5-8 parts of acid source component.
In some embodiments, the melamine phosphate is present in the acid source component in an amount ranging from 40% to 65% by weight.
In some of these embodiments, the carbon source component is selected from at least one of sorbitol, pentaerythritol, and pentaerythritol polymers; or/and the gas source component is selected from at least one of urea, dicyandiamide, melamine and polyamide.
In some of these embodiments, the carbon source component comprises sorbitol and comprises at least one of pentaerythritol and pentaerythritol polymers; or/and the gas source component comprises dicyandiamide and at least one of urea, melamine and polyamide.
The invention also aims to provide a method for preparing the intumescent flame retardant composition.
The purpose of the invention is realized by the following technical scheme:
a process for the preparation of an intumescent flame retardant composition as described above, said process comprising the steps of:
and grinding the acid source component, the carbon source component and the acid source component.
In some embodiments, the grinding time is controlled to be 1-2h, and the grinding is carried out at normal temperature.
The invention also aims to provide the use of an intumescent flame retardant composition as described above.
The purpose of the invention is realized by the following technical scheme:
use of an intumescent flame retardant composition as described above as a flame retardant in the preparation of a modified ultra high molecular weight polyethylene material.
The invention also aims to provide a modified ultrahigh molecular weight polyethylene material.
The purpose of the invention is realized by the following technical scheme:
a modified ultra-high molecular weight polyethylene material is prepared from the following raw materials:
Figure BDA0002404952120000031
Figure BDA0002404952120000041
a flame retardant which is an intumescent flame retardant composition as described above;
the sum of the mass parts of the preparation raw materials is 100 parts.
In some embodiments, the viscosity average molecular weight of the ultra-high molecular weight polyethylene material is 200-; or/and the antistatic agent is selected from at least one of conductive carbon black, conductive graphite, carbon nano tubes and conductive graphene; or/and the antioxidant is at least one selected from antioxidant 1010, antioxidant 1076 and antioxidant 168; or/and the coupling agent is selected from at least one of titanate coupling agent, silane coupling agent and aluminate coupling agent; or/and the compatilizer is selected from at least one of polyethylene grafted maleic anhydride copolymer, polyethylene grafted acrylic acid copolymer and polyethylene grafted methyl acrylate copolymer; or/and the dispersing agent is selected from at least one of zinc stearate, calcium stearate, magnesium stearate, aluminum stearate and barium stearate; or/and the flow modifier is selected from at least one of high density polyethylene, low density polyethylene, linear low density polyethylene and metallocene catalyzed polyethylene.
The invention also aims to provide a preparation method of the modified ultrahigh molecular weight polyethylene material.
The purpose of the invention is realized by the following technical scheme:
the preparation method of the modified ultrahigh molecular weight polyethylene material comprises the following steps:
mixing the flame retardant and the coupling agent to obtain a component A;
mixing the component A, the ultra-high molecular weight polyethylene, the antistatic agent, the antioxidant, the compatilizer, the dispersant and the flow modifier to obtain a component B;
and drying, plasticizing, dispersing and extruding the component B.
In some of these embodiments, the temperature of the extrusion is controlled at 180-220 ℃.
The invention has the following beneficial effects:
the invention matches melamine phosphate with at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate and alkyl phosphate to form a compound acid source, and forms a specific flame retardant formula together with the acid source, a carbon source component and an air source component.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the invention provides an intumescent flame retardant composition, which comprises the following raw materials in parts by mass: 1-5 parts of an acid source component, 1-13 parts of a carbon source component and 1-16 parts of a gas source component;
the acid source component comprises melamine phosphate and at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate, and alkyl phosphate.
In the embodiment of the invention, melamine phosphate is matched with at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate and alkyl phosphate to form a compound acid source, and the acid source, a carbon source component and an air source component are combined to form a specific flame retardant formula.
Many conventional flame retardants (including but not limited to halogen flame retardants and conventional halogen-free flame retardants) are not easily dispersed in the ultra-high molecular weight polyethylene material, and therefore, the flame retardant effect is not good, and therefore, the addition amount of the flame retardant is usually large, and the addition amount of the flame retardant is 15 to 25 parts per 100 parts of the ultra-high molecular weight polyethylene material. By adopting the formula of the intumescent flame retardant composition disclosed by the embodiment of the invention, a good flame retardant effect can be realized under the condition of low addition amount.
Preferably, the intumescent flame retardant composition is prepared from the following raw materials in parts by mass: 2.4-2.9 parts of acid source component, 2.5-6 parts of carbon source component and 4.5-8 parts of acid source component.
Preferably, in the acid source component, the mass percentage of the melamine phosphate is 40-65%.
Preferably, the carbon source component is selected from at least one of sorbitol, pentaerythritol, and pentaerythritol polymers; or/and the gas source component is selected from at least one of urea, dicyandiamide, melamine and polyamide
Preferably, the carbon source component comprises sorbitol and at least one of pentaerythritol and pentaerythritol polymers. The optimized and matched carbon source components are adopted, so that the limit oxygen index of the ultra-high molecular weight polyethylene can be further improved in an auxiliary manner.
Preferably, the gas source component comprises dicyandiamide and at least one of urea, melamine and polyamide. The optimized matched gas source components are adopted, so that the limit oxygen index of the ultra-high molecular weight polyethylene can be further improved in an auxiliary manner.
The flame retardant mechanism of the intumescent flame retardant composition of the embodiments of the invention is as follows:
when the intumescent flame retardant composition added into the ultra-high molecular weight polyethylene is heated, a porous intumescent carbon layer is generated on the surface, so that the transmission of oxygen and heat is isolated, and the flame retardant effect is achieved; and the carbon layer formed by expansion also inhibits the generation of combustible gas and smoke, and reduces the spread of fire sources. The most important porous carbon layer is formed as follows: the first step is as follows: at a lower temperature (100-; the second step is that: at a higher temperature (200-; the third step: the composition is melted in the reaction process, and the surface of the composition is expanded to form foaming due to the water vapor generated in the reaction and the inert ingredients generated by the gas source components; the fourth step: under the high temperature condition (600 ℃ C. and 800 ℃ C.), the surface of the composition is rapidly solidified to form the expanded carbon layer.
It is also an aim of embodiments of the present invention to provide a method of preparing an intumescent flame retardant composition as described above, the method of preparation comprising the steps of:
and grinding the acid source component, the carbon source component and the acid source component.
Preferably, the grinding time is controlled to be 1-2h, and the grinding is carried out at normal temperature.
It is understood that the milling described in the examples of the present invention is ball milling.
According to the preparation method of the intumescent flame retardant composition provided by the embodiment of the invention, the particle size of the intumescent flame retardant composition is reduced by a surface treatment method of physical grinding, and the compatibility with the ultrahigh molecular weight polyethylene material is improved, so that the intumescent flame retardant composition is better dispersed in the ultrahigh molecular weight polyethylene material.
The embodiment of the invention also provides application of the intumescent flame retardant composition as described above as a flame retardant in preparation of modified ultrahigh molecular weight polyethylene materials.
The invention also aims to provide a modified ultrahigh molecular weight polyethylene material, which comprises the following raw materials in parts by mass:
Figure BDA0002404952120000071
Figure BDA0002404952120000081
a flame retardant which is an intumescent flame retardant composition as described above;
the sum of the mass parts of the preparation raw materials is 100 parts.
Preferably, the viscosity average molecular weight of the ultra-high molecular weight polyethylene material is 200-450 ten thousand.
Preferably, the antistatic agent is selected from at least one of conductive carbon black, conductive graphite, carbon nanotubes, and conductive graphene. According to the embodiment of the invention, the surface resistivity of the material reaches 10 by using the conductive graphene with proper dosage6Omega cm, meets the antistatic requirement of oil and gas pipeline transportation.
Preferably, the antioxidant is at least one selected from the group consisting of antioxidant 1010, antioxidant 1076, and antioxidant 168.
Preferably, the coupling agent is selected from at least one of a titanate coupling agent, a silane coupling agent, and an aluminate coupling agent.
Preferably, the compatibilizer is at least one selected from the group consisting of a polyethylene-grafted maleic anhydride copolymer, a polyethylene-grafted acrylic acid copolymer, and a polyethylene-grafted methyl acrylate copolymer.
The embodiment of the invention ensures that the ultrahigh molecular weight polyethylene material, the flame retardant and the antistatic agent have good compatibility by adopting the compatilizer and the coupling agent,
preferably, the dispersing agent is at least one selected from zinc stearate, calcium stearate, magnesium stearate, aluminum stearate, and barium stearate. Preferably, the flow modifier is selected from at least one of high density polyethylene, low density polyethylene, linear low density polyethylene, metallocene catalyzed polyethylene. The embodiment of the invention simultaneously introduces the flowing modifier and the dispersing agent in a certain proportion to promote the effective dispersion of various additives in the ultra-high molecular weight polyethylene material and ensure that the modified material still has good physical and mechanical properties, such as impact strength, tensile strength, elongation at break and the like.
The ultra-high molecular weight polyethylene material has poor flame retardant property and surface resistance of 1014-1016Omega cm, therefore, the flame retardant and antistatic modification needs to be carried out on the material, and the total amount of the additive is generally 18-30% by adopting the traditional modification method (for example, adding carbon black, graphite or metal powder, compounding bromine, phosphorus, silicon or inorganic filler flame retardant and the like), so that the processing fluidity of the ultrahigh molecular weight polyethylene can be reduced, the agglomeration possibly occurs among the additives, the surface smoothness of the material is reduced, and even the mechanical property of the whole material is reduced. When the embodiment of the invention adopts the intumescent flame-retardant composition ultra-high molecular weight polyethylene material for modification, the flame-retardant effect is obvious, and the limited oxygen index performance is higher.
For flame-retardant and antistatic materials, the action effect of flame retardants and antistatic agents has a great relationship with the compatibility of the flame retardants and the antistatic agents in the materials, and if the compatibility is poor, the action effect is general, and the physical and mechanical properties of the materials are easily reduced. In the preparation raw materials of the modified ultra-high molecular weight polyethylene material provided by the embodiment of the invention, the selected antistatic agent, the flow modifier, the antioxidant, the dispersant, the compatilizer and the like have good nonpolar structures similar to those of the intumescent flame retardant composition, so that the overall compatibility of the modified material is optimized, and the modified ultra-high molecular weight polyethylene is ensured to still have good physical and mechanical properties.
The invention also aims to provide a preparation method of the modified ultrahigh molecular weight polyethylene material.
The purpose of the invention is realized by the following technical scheme:
the preparation method of the modified ultrahigh molecular weight polyethylene material comprises the following steps:
mixing the flame retardant and the coupling agent to obtain a component A;
mixing the component A, the ultra-high molecular weight polyethylene, the antistatic agent, the antioxidant, the compatilizer, the dispersant and the flow modifier to obtain a component B;
and drying, plasticizing, dispersing and extruding the component B.
Preferably, the temperature of the extrusion is controlled at 180-220 ℃.
Example 1
The embodiment provides a modified ultra-high molecular weight polyethylene material. The raw material formula of the modified ultra-high molecular weight polyethylene material is shown in table 1; the preparation method of the modified ultrahigh molecular weight polyethylene material comprises the following steps:
1. respectively placing the acid source component of the flame retardant, the carbon source component of the flame retardant and the gas source component of the flame retardant into a ball mill for grinding for 1 hour at normal temperature;
2. then putting the product obtained in the step 1 and a coupling agent into a high-speed mixer for stirring at a stirring speed of 500 r/min to obtain a component A;
3. at normal temperature, then placing the component A, the ultrahigh molecular weight polyethylene, the antistatic agent, the antioxidant, the compatilizer, the dispersant and the flow modifier into a high-speed mixer for mixing for 5 minutes to obtain a component B;
4. pre-drying the component B at 70 ℃ for 2 hours, plasticizing and dispersing by an extruder at the extrusion temperature of 180 ℃, and granulating and storing. Thereby obtaining the flame-retardant antistatic ultra-high molecular weight polyethylene material.
Example 2
The embodiment provides a modified ultra-high molecular weight polyethylene material. The raw material formula of the modified ultra-high molecular weight polyethylene material is shown in table 1; the preparation method of the modified ultrahigh molecular weight polyethylene material comprises the following steps:
1. at normal temperature, respectively placing the acid source component of the flame retardant, the carbon source component of the flame retardant and the gas source component of the flame retardant into a ball mill for grinding for 1.5 hours;
2. then putting the product obtained in the step 1 and a coupling agent into a high-speed mixer for stirring at the stirring speed of 1000 revolutions per minute to obtain a component A;
3. at normal temperature, then placing the component A, the ultrahigh molecular weight polyethylene, the antistatic agent, the antioxidant, the compatilizer, the dispersant and the flow modifier into a high-speed mixer for mixing for 5 minutes to obtain a component B;
4. pre-drying the component B at the drying temperature of 80 ℃ for 3 hours, plasticizing and dispersing by an extruder at the extrusion temperature of 200 ℃, and granulating and storing. Thereby obtaining the flame-retardant antistatic ultra-high molecular weight polyethylene material.
Example 3
The embodiment provides a modified ultra-high molecular weight polyethylene material. The raw material formula of the modified ultra-high molecular weight polyethylene material is shown in table 1; the preparation method of the modified ultrahigh molecular weight polyethylene material comprises the following steps:
1. respectively placing the acid source component of the flame retardant, the carbon source component of the flame retardant and the gas source component of the flame retardant into a ball mill for grinding for 2 hours at normal temperature;
2. then putting the product obtained in the step 1 and a coupling agent into a high-speed mixer for stirring at a stirring speed of 1500 rpm to obtain a component A;
3. at normal temperature, then placing the component A, the ultrahigh molecular weight polyethylene, the antistatic agent, the antioxidant, the compatilizer, the dispersant and the flow modifier into a high-speed mixer for mixing for 5 minutes to obtain a component B;
4. pre-drying the component B at the drying temperature of 95 ℃ for 4 hours, plasticizing and dispersing by an extruder at the extrusion temperature of 220 ℃, and granulating and storing. Thereby obtaining the flame-retardant antistatic ultra-high molecular weight polyethylene material.
TABLE 1
Figure BDA0002404952120000111
Figure BDA0002404952120000121
Example 4
The embodiment is a variation of embodiment 1, and the main variation with respect to embodiment 1 is a raw material formula of the modified ultra-high molecular weight polyethylene material, specifically, the carbon source components in the embodiment are pentaerythritol and sorbitol in a mass ratio of 1:1 formulation, see table 2 below.
Example 5
The present embodiment is a variation of embodiment 1, and the main variation with respect to embodiment 1 is a raw material formula of the modified ultrahigh molecular weight polyethylene material, specifically, the gas source components of the present embodiment are melamine and dicyandiamide in a mass ratio of 1:1, see table 2 below.
Example 6
This example is a variation of example 1, and the main variation with respect to example 1 is the raw material formulation of the modified ultra-high molecular weight polyethylene material, specifically, the mass percentage content of the melamine phosphate in the acid source component in this example is 80%, as shown in table 2 below.
TABLE 2
Figure BDA0002404952120000131
Examples 7 to 8
Examples 7-8 are variations of example 1, the main variation from example 1 being the raw material formulation for the modified ultra high molecular weight polyethylene material, as shown in table 3 below.
TABLE 3
Figure BDA0002404952120000141
Comparative example 1
This comparative example is that of example 1, the main difference with respect to example 1 being: in the raw material formula of the modified ultra-high molecular weight polyethylene material, the acid source component is only ammonium phosphate.
The performance test method and results are as follows:
taking samples of the modified ultrahigh molecular weight polyethylene materials of the examples and the comparative examples, and performing performance test by referring to the following methods:
1. tensile strength: refer to GB/T1040 in MPa.
2. Elongation at break: refer to GB/T1040 in%.
3. Notched impact strength: with reference to GB/T1843, the unit kJ/m2。
4. Surface resistivity: refer to GB/T1410-2006, unit Ω · cm.
5. Flame retardant rating: see UL 94.
6. Limiting oxygen index test: reference is made to ISO 4589-2 in%.
The test results are as follows:
TABLE 4
Figure BDA0002404952120000151
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. The intumescent flame-retardant composition is characterized in that the intumescent flame-retardant composition is prepared from the following raw materials in parts by mass: 1-5 parts of an acid source component, 1-13 parts of a carbon source component and 1-16 parts of a gas source component;
the acid source component consists of melamine phosphate and at least one of ammonium phosphate, ammonium sulfate, ammonium polyphosphate, tricresyl phosphate and alkyl phosphate,
in the acid source component, the mass percentage of the melamine phosphate is 40-65%;
the carbon source component is pentaerythritol or a mixture of pentaerythritol and sorbitol;
the gas source component is melamine or a mixture of melamine and dicyandiamide.
2. The intumescent flame retardant composition of claim 1, characterized in that it is prepared from the following raw materials, in parts by mass: 2.4-2.9 parts of acid source component, 2.5-6 parts of carbon source component and 4.5-8 parts of gas source component.
3. Intumescent flame retardant composition according to claim 1 or 2, characterized in that the mass percentage of melamine phosphate in the acid-derived component is 40%, 45% or 65%.
4. Intumescent flame retardant composition according to claim 1 or 2, characterized in that the carbon source component is pentaerythritol or a mixture of pentaerythritol and sorbitol in a mass ratio of 1: 1.
5. Intumescent flame retardant composition according to claim 1 or 2, characterized in that the gas source component is melamine or a mixture of melamine and dicyandiamide in a mass ratio of 1: 1.
6. Process for the preparation of an intumescent flame retardant composition according to any of claims 1 to 5, characterized in that it comprises the following steps:
and grinding the acid source component, the carbon source component and the gas source component.
7. Process for the preparation of an intumescent flame retardant composition according to claim 6, characterized in that the time of said grinding is controlled between 1 and 2 hours, said grinding being carried out at normal temperature.
8. Use of the intumescent flame retardant composition of any of claims 1 to 5 as a flame retardant in the preparation of a modified ultra high molecular weight polyethylene material.
9. The modified ultrahigh molecular weight polyethylene material is characterized in that the modified ultrahigh molecular weight polyethylene material is prepared from the following raw materials in parts by mass:
Figure FDA0003425423810000021
a flame retardant which is an intumescent flame retardant composition as claimed in any of claims 1 to 5;
the sum of the mass of the preparation raw materials is 100 parts.
10. The modified ultra-high molecular weight polyethylene material as claimed in claim 9, wherein the viscosity average molecular weight of the ultra-high molecular weight polyethylene material is 200-450 ten thousand; or/and the antistatic agent is selected from at least one of conductive carbon black, conductive graphite, carbon nano tubes and conductive graphene; or/and the antioxidant is at least one selected from antioxidant 1010, antioxidant 1076 and antioxidant 168; or/and the coupling agent is selected from at least one of titanate coupling agent, silane coupling agent and aluminate coupling agent; or/and the compatilizer is selected from at least one of polyethylene grafted maleic anhydride copolymer, polyethylene grafted acrylic acid copolymer and polyethylene grafted methyl acrylate copolymer; or/and the dispersing agent is selected from at least one of zinc stearate, calcium stearate, magnesium stearate, aluminum stearate and barium stearate; or/and the flow modifier is selected from at least one of high density polyethylene, low density polyethylene, linear low density polyethylene and metallocene catalyzed polyethylene.
11. The method of claim 9 or 10, wherein the method comprises the steps of:
mixing the flame retardant and the coupling agent to obtain a component A;
mixing the component A, the ultra-high molecular weight polyethylene, the antistatic agent, the antioxidant, the compatilizer, the dispersant and the flow modifier to obtain a component B;
and drying, plasticizing, dispersing and extruding the component B.
12. The method for preparing modified UHMWPE material as claimed in claim 11, wherein the temperature of the extrusion is controlled at 180-220 ℃.
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CN101434723A (en) * 2007-11-16 2009-05-20 上海化工研究院 Antistatic halogen-free flame-retardant ultra-high molecular weight polyvinyl composite
CN102942728A (en) * 2012-10-24 2013-02-27 常州大学 Antistatic halogen-free fire retardation ultra-high molecule weight polyethylene material and preparation method thereof
CN103613830A (en) * 2013-12-18 2014-03-05 江苏悦达墨特瑞新材料科技有限公司 Antistatic halogen-free flame-resistant UHMWPE (ultrahigh-molecular-weight polyethylene)/graphene composite material and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN101434723A (en) * 2007-11-16 2009-05-20 上海化工研究院 Antistatic halogen-free flame-retardant ultra-high molecular weight polyvinyl composite
CN102942728A (en) * 2012-10-24 2013-02-27 常州大学 Antistatic halogen-free fire retardation ultra-high molecule weight polyethylene material and preparation method thereof
CN103613830A (en) * 2013-12-18 2014-03-05 江苏悦达墨特瑞新材料科技有限公司 Antistatic halogen-free flame-resistant UHMWPE (ultrahigh-molecular-weight polyethylene)/graphene composite material and preparation method thereof

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