CN114456580A - Low-smoke halogen-free thermoplastic elastomer fire-resistant cable material and production process - Google Patents
Low-smoke halogen-free thermoplastic elastomer fire-resistant cable material and production process Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
- C08B37/0036—Galactans; Derivatives thereof
- C08B37/0042—Carragenan or carragen, i.e. D-galactose and 3,6-anhydro-D-galactose, both partially sulfated, e.g. from red algae Chondrus crispus or Gigantia stellata; kappa-Carragenan; iota-Carragenan; lambda-Carragenan; Derivatives thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2248—Oxides; Hydroxides of metals of copper
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Abstract
The application relates to the technical field of cable materials, and particularly discloses a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material and a production process. A low-smoke halogen-free thermoplastic elastomer fire-resistant cable material comprises the following raw materials in parts by weight: 100-150 parts of thermoplastic elastomer, 20-35 parts of ammonium polyphosphate, 15-25 parts of metal oxide smoke suppressant, 10-20 parts of carrageenan, 0.5-1.5 parts of stearic acid, 0.2-2.5 parts of antioxidant and 0.2-2.5 parts of lubricant. The low-smoke halogen-free thermoplastic elastomer fire-resistant cable material has excellent flame retardant property, smoke suppression property and mechanical property.
Description
Technical Field
The application relates to the technical field of cable materials, in particular to a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material and a production process.
Background
The cable is a key apparatus for connecting equipment, controlling installation, power transmission and information transmission. The conventional halogen-containing flame-retardant cable has the defects of poor environment resistance and easy aging in the using process, and is very easy to cause fire accidents caused by short circuit and fire leakage of the cable of an electric appliance, and a large amount of toxic and corrosive gas can be generated in the combustion process, so that a great amount of casualties and property loss are caused. Therefore, the low-smoke halogen-free flame-retardant cable material is produced at the right moment, the flame retardance and the smoke suppression effect of the low-smoke halogen-free flame-retardant cable material are improved by mainly adding inorganic flame retardant and smoke suppression agents such as metal oxide molybdate, iron-containing compounds, metal oxide and the like, the low-smoke halogen-free flame-retardant cable material is selected for use, the risk of fire occurrence can be effectively reduced, the fire loss is reduced, the personnel and property safety is effectively guaranteed, and a large amount of toxic and corrosive gas can not be generated in the combustion process.
In view of the above-mentioned related technologies, the applicant finds that the low-smoke halogen-free cable material added with the inorganic flame retardant and the smoke suppressant has a certain loss in mechanical properties, and the service life of the cable is reduced.
Disclosure of Invention
In order to ensure the mechanical property of the cable material while realizing the low-smoke halogen-free performance of the cable material, the application provides a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material and a production process.
In a first aspect, the application provides a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material and a production process, and adopts the following technical scheme:
a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material comprises the following raw materials in parts by weight: 100-150 parts of thermoplastic elastomer, 20-35 parts of ammonium polyphosphate, 15-25 parts of metal oxide smoke suppressant, 10-20 parts of carrageenan, 0.5-1.5 parts of stearic acid, 0.2-2.5 parts of antioxidant and 0.2-2.5 parts of lubricant.
By adopting the technical scheme, the ammonium polyphosphate decomposes water and ammonia gas at high temperature, the water absorbs environmental heat, and the ammonia gas dilutes the oxygen concentration, so that the flame retardant property is improved; in addition, polyphosphoric acid can be decomposed from ammonium polyphosphate at high temperature, polyphosphoric acid reacts with carrageenan to form a carbon layer, meanwhile, the metal oxide smoke suppressant catalyzes the formation of the carbon layer, the metal oxide covers the surface of the carbon layer and can also play a role in reinforcing the carbon layer, the carbon layer plays a role in blocking, oxygen is isolated, the flame retardant effect of the cable material is further improved, and the limit oxygen index can be reached.
The metal oxide smoke inhibitor can capture hydroxyl radicals generated by combustion to realize smoke inhibition effect, and in addition, the metal oxide can promote the thermal decomposition of ammonium polyphosphate to form polyphosphoric acid compounds, promote the crosslinking and solidification of polyphosphoric acid in the later combustion stage, improve the quality of carbon layer and further improve the smoke inhibition effect.
Ammonium polyphosphate can influence thermoplastic elastomer's continuity as the fire retardant, causes tensile strength's decline, and the metal oxide smoke suppressant in this application plays the reinforcement effect, has promoted the tensile strength of cable material with methoxy group, amino cooperation in the carrageenan, improves cable material mechanical properties.
Preferably, the feed comprises the following raw materials in parts by weight: 110-140 parts of thermoplastic elastomer, 25-30 parts of ammonium polyphosphate, 18-23 parts of metal oxide smoke suppressant, 12-16 parts of carrageenan, 1.0-1.3 parts of stearic acid, 0.5-2.0 parts of antioxidant and 0.5-2.0 parts of lubricant.
By adopting the technical scheme, the proportion of the raw materials is further optimized, and the comprehensive performance of the cable material is improved.
Preferably, the metal oxide comprises one or more of iron oxide, aluminum oxide and copper oxide.
By adopting the technical scheme, the iron oxide, the aluminum oxide and the copper oxide can all play roles in improving the flame retardance, smoke suppression and mechanical properties of the cable material. The promotion degree of different metal oxides to ammonium polyphosphate thermal decomposition is different, and two or more of iron oxide, aluminum oxide and copper oxide are matched, so that the promotion effect on ammonium polyphosphate thermal decomposition is improved, and the flame retardant and smoke suppression effects are further improved.
Preferably, the particle size of the metal oxide smoke suppressant is 15 to 25 nm.
By adopting the technical scheme, the metal oxide smoke suppressant in the particle size range has good flame retardant and smoke suppressant effects, and cannot generate adverse effects on the mechanical properties of the cable material, and the mechanical properties of the cable material are reduced due to the excessively large or excessively small particle size.
Preferably, the carrageenan is fractionated by a barium chloride solution, and the processing method comprises the following steps:
1) dissolving carrageenan in water at 85-95 ℃ to obtain a carrageenan solution;
2) carrying out suction filtration on the carrageenin solution while the carrageenin solution is hot to obtain a suction filtration solution, adding the barium chloride solution into the suction filtration solution, and uniformly mixing to obtain a mixed solution;
3) and (3) carrying out suction filtration on the mixed solution, washing the jelly obtained by suction filtration with absolute ethyl alcohol, repeating the suction filtration and washing operations for 3-4 times, and drying the obtained suction filtration product to obtain the carrageenan graded by the barium chloride solution.
By adopting the technical scheme, the carrageenan is subjected to grading treatment by using the barium chloride solution, calcium ions are introduced into the carrageenan, and barium sulfate precipitates are generated and doped in a carbon layer formed by the reaction of polyphosphoric acid and the carrageenan under the action of high temperature, so that the thickness of the carbon layer is increased, the high-temperature thermal stability of the carbon layer is enhanced, and the flame retardant property of the cable material is further improved.
Preferably, the metal oxide smoke inhibitor is subjected to surface modification by taking polysiloxane oligomer as a surfactant; the metal oxide smoke inhibitor is prepared from polysiloxane oligomer (10-20): 1.
the nano-level metal oxide smoke suppressant has a large specific surface area and is easy to agglomerate, the nano-level metal oxide smoke suppressant is unevenly dispersed in a matrix, and the mechanical property of a cable material is reduced. However, the polysiloxane oligomer has too high content, so that the metal oxide is gathered in the matrix, the dispersion of the metal oxide is limited, and meanwhile, the polysiloxane oligomer plasticizes molecular chain segments of the matrix, so that the disentanglement of the molecular chain segments of the polymer in the stretching process is promoted, and the mechanical property of the cable material is reduced.
Preferably, it further comprises 5 to 15 parts by weight of a thermoplastic polyacrylate rubber.
By adopting the technical scheme, the polymerization monomer of the acrylic rubber is acrylic ester, unsaturated double bonds are not arranged on the molecular chain of the monomer after polymerization, a polar ester group is introduced, and the metal oxide is compatible with the acrylic rubber, so that the cable material is more stable, and the mechanical property is improved.
In a second aspect, the application provides a production process of a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material, which adopts the following technical scheme:
a production process of a low-smoke halogen-free thermoplastic elastomer fire-resistant cable material comprises the following steps:
s1, mixing a thermoplastic elastomer and a metal oxide smoke suppressant in parts by weight to obtain a primary mixed material:
s2, adding ammonium polyphosphate, carrageenan, stearic acid, an antioxidant and a lubricant into the primary refining material according to the weight parts, and performing mulling and granulation to obtain the low-smoke halogen-free thermoplastic elastomer fire-resistant cable material.
Preferably, in step S1, the thermoplastic polyacrylate rubber is kneaded with the thermoplastic elastomer and the metal oxide smoke suppressant.
By adopting the technical scheme, the production process has no special requirements on equipment, is simple and easy to operate, and is suitable for mass production.
In summary, the present application has the following beneficial effects:
1. because the ammonium polyphosphate, the metal oxide smoke suppressant and the carrageenan are cooperatively matched, the limit oxygen index of the prepared cable material reaches 33.3-35.2%, the maximum smoke density reaches 117-131, the tensile strength reaches 14.8-16.8Mpa, and the cable material has excellent comprehensive properties such as flame retardance, smoke suppression, mechanical property and the like.
2. In the application, the polysiloxane oligomer is preferably adopted to carry out surface modification on the metal oxide smoke suppressant, so that the flame retardant property, smoke suppression property and mechanical property of the cable material are further improved.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation examples of starting materials and intermediates
Raw materials
All the raw materials in the examples of the present application are commercially available:
the thermoplastic elastomer is a thermoplastic polyurethane elastomer;
the antioxidant is dilauryl thiodipropionate;
the lubricant is paraffin;
the polysiloxane oligomer is alicyclic epoxy polysiloxane oligomer and has a molecular weight of 4014.
Preparation example
Preparation example 1
The preparation method of the carrageenan graded by the barium chloride solution comprises the following steps:
1) adding 1kg of carrageenan into 100L of water, and stirring at 90 ℃ and 350r/min to completely dissolve the carrageenan in the water to obtain a carrageenan solution;
2) carrying out suction filtration on the carrageenin solution while the carrageenin solution is hot to obtain a suction filtration solution, adding 100L of a barium chloride solution with the concentration of 0.5mol/L into the filtrate, and uniformly mixing to obtain a mixed solution;
3) and (3) carrying out suction filtration on the mixed solution, washing the jelly obtained by suction filtration with absolute ethyl alcohol, then repeating the suction filtration and washing operations for 3 times, and carrying out vacuum drying on the obtained suction filtration product at 45 ℃ for 8 hours to obtain the carrageenan graded by the barium chloride solution.
Preparation example 2
A polysiloxane oligomer modified metal oxide smoke inhibitor is prepared by the following steps:
4kg of metal oxide smoke suppressant and 0.2kg of polysiloxane oligomer are mixed in a high-speed dispersant with the rotating speed of 1000r/min for 5min to obtain the polysiloxane oligomer modified iron oxide smoke suppressant.
Preparation example 3
In contrast to preparation example 2, preparation example 3 used 0.3kg of polysiloxane oligomer.
Preparation example 4
In contrast to preparation 2, preparation 3 used 0.4kg of polysiloxane oligomer.
Preparation example 5
In contrast to preparation 2, preparation 3 used 0.5kg of polysiloxane oligomer.
Examples
Example 1
A low-smoke halogen-free thermoplastic elastomer fire-resistant cable material comprises the following production processes:
s1, mixing a thermoplastic elastomer and a metal oxide smoke suppressant at 200 ℃ according to the proportion in Table 1 to obtain a primary mixed material:
s2, adding ammonium polyphosphate, carrageenan, stearic acid, an antioxidant and a lubricant into the primary refining material according to the mixture ratio shown in the table 1, mixing at 200 ℃, and then granulating to obtain the low-smoke halogen-free thermoplastic elastomer fire-resistant cable material.
TABLE 1 EXAMPLES 1-5 raw materials proportioning Table (kg)
Wherein the particle size of the ferric oxide smoke suppressant is 15-25 nm.
Example 6
In contrast to example 3, example 6 replaces 10kg of the iron oxide smoke suppressant with 10kg of the aluminum oxide smoke suppressant.
Example 7
In contrast to example 3, example 7 replaced 14kg of the iron oxide smoke suppressant with 7kg of the alumina smoke suppressant, 7kg of the copper oxide smoke suppressant.
Example 8
Unlike example 7, the particle size of the iron oxide smoke suppressant, aluminum oxide smoke suppressant, and copper oxide smoke suppressant in example 8 was 35 to 45 nm.
Example 9
Unlike example 7, the particle size of the iron oxide smoke suppressant, aluminum oxide smoke suppressant, and copper oxide smoke suppressant in example 9 was 5 to 10 nm.
Example 10
In contrast to example 7, in example 10 the carrageenan was replaced by an equal amount of the fractionated carrageenan from the barium chloride solution obtained in preparation example 1.
Examples 11 to 14
In contrast to example 7, examples 11-14 replaced the untreated metal oxide smoke suppressant of example 7 with an equal amount of the polysiloxane oligomer-modified metal oxide smoke suppressant from preparations 2-5.
Example 15
In contrast to example 12, in example 15 the carrageenan was replaced by an equal amount of the fractionated carrageenan from the barium chloride solution obtained in preparation example 1.
Examples 16 to 20
Unlike example 15, the materials of examples 16-20 further included 5kg, 10kg, 15kg, 20kg, and 30kg of thermoplastic polyacrylate rubber, respectively; the production process comprises the following steps:
s1, mixing a thermoplastic elastomer, thermoplastic polyacrylate rubber and a metal oxide smoke suppressant at 200 ℃ to obtain a primary mixed material:
s2, adding ammonium polyphosphate, carrageenan, stearic acid, antioxidant and lubricant into the primary refining material, mixing at 200 ℃, and then granulating to obtain the low-smoke halogen-free thermoplastic elastomer fire-resistant cable material
Comparative example
Comparative example 1
Unlike example 1, comparative example 1 contained no carrageenan.
Comparative example 2
Unlike example 1, comparative example 2 replaces ammonium polyphosphate with an equivalent amount of magnesium hydroxide flame retardant.
Performance test
Detection method/test method
And (3) testing the flame retardant property: the cable materials in examples 1-20 and comparative examples 1-2 were tested for limiting oxygen index with reference to "determination of burning behavior by oxygen index method for plastics" GB/T2406.2-2009, and the test results are shown in table 2.
And (3) smoke suppression performance detection: the cable materials in examples 1-20 and comparative examples 1-2 were tested at 50KW/m with reference to Smoke Density and toxicity test ISO 5659-2:20172The limiting oxygen index was measured and the results are shown in Table 2.
And (3) testing mechanical properties: the cable materials of examples 1-20 and comparative examples 1-2 were tested for tensile strength with reference to "determination of tensile Properties of plastics" GB/T1040-2018, and the test results are shown in Table 2.
TABLE 2 Performance test results
By combining examples 1-17 and comparative examples 1-2, and by combining table 2, it can be seen that the limited oxygen index, smoke density and tensile strength of the cable material in examples 1-17 are superior to those of comparative examples 1-2, which indicates that the cable material produced by the application has good flame-retardant and smoke-suppressing effects, excellent mechanical properties and better comprehensive properties.
By combining the example 1 and the comparative examples 1-2 and combining the table 2, it can be seen that the carrageenan is not added in the comparative example 1, the ammonium polyphosphate flame retardant is replaced by the magnesium hydroxide flame retardant in the comparative example 2, and the flame retardant property, the smoke suppression property and the mechanical property of the cable material in the comparative examples 1-2 are obviously reduced compared with those of the example 1, which is probably because the carrageenan, the sodium polyphosphate and the metal oxide smoke suppression agent are mutually matched, so that the flame retardant property, the smoke suppression property and the mechanical property of the cable material are improved, and the comprehensive performance of the produced cable is better.
By combining the examples 3 and 6-7 and combining the table 2, it can be seen that the smoke suppressant of three metal oxides, namely iron oxide, aluminum oxide and copper oxide, can further improve the smoke suppression performance of the cable material, and meanwhile, the flame retardant performance and the mechanical property of the cable material are also improved.
By combining examples 7-9 and table 2, it can be seen that, compared with example 7, the flame retardant property and the smoke suppression property of the cable material in examples 8-9 are not changed much, but the mechanical property is obviously reduced, which indicates that the particle size of the metal oxide smoke suppressant is within the range defined in the application, so that the flame retardant property, the smoke suppression property and the mechanical property of the cable material all reach better levels, and the comprehensive performance of the cable material is improved.
By combining example 7 and example 10, and by combining table 2, it can be seen that the flame retardant performance of the cable material in example 10 is improved, which may be because the carrageenan is subjected to a classification treatment with a barium chloride solution, calcium ions are introduced into the carrageenan, and under the action of high temperature, barium sulfate precipitates are generated and doped in the carbon layer formed by the reaction of polyphosphoric acid and the carrageenan, so that the thickness of the carbon layer is increased, the high-temperature thermal stability of the carbon layer is enhanced, and the flame retardant performance of the cable material is further improved.
By combining example 7 with examples 11 to 14 and table 2, it can be seen that the mechanical properties of the cable materials in examples 11 to 14 are improved, which may be because the polysiloxane oligomer performs surface modification on the metal oxide smoke suppressant, so that the dispersion properties of the metal oxide in the matrix are improved, and the mechanical properties of the cable materials are improved; however, the mechanical properties of example 14 were reduced, probably because the polysiloxane oligomer content was so high that the metal oxide was aggregated in the matrix, limiting the dispersion of the metal oxide.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A low-smoke halogen-free thermoplastic elastomer fire-resistant cable material is characterized by comprising the following raw materials in parts by weight: 100-150 parts of thermoplastic elastomer, 20-35 parts of ammonium polyphosphate, 15-25 parts of metal oxide smoke suppressant, 10-20 parts of carrageenan, 0.5-1.5 parts of stearic acid, 0.2-2.5 parts of antioxidant and 0.2-2.5 parts of lubricant.
2. The low smoke zero halogen thermoplastic elastomer fire resistant cable material according to claim 1, wherein: the feed comprises the following raw materials in parts by weight: 110-140 parts of thermoplastic elastomer, 25-30 parts of ammonium polyphosphate, 18-23 parts of metal oxide smoke suppressant, 12-16 parts of carrageenan, 1.0-1.3 parts of stearic acid, 0.5-2.0 parts of antioxidant and 0.5-2.0 parts of lubricant.
3. The low smoke zero halogen thermoplastic elastomer fire resistant cable material according to claim 1, wherein: the metal oxide comprises one or more of iron oxide, aluminum oxide and copper oxide.
4. The low smoke zero halogen thermoplastic elastomer fire resistant cable material of claim 3, wherein: the particle size of the metal oxide smoke suppressant is 15-25 nm.
5. The low smoke zero halogen thermoplastic elastomer fire resistant cable material according to claim 1, wherein: the carrageenan is classified by barium chloride solution, and the processing method comprises the following steps:
1) dissolving carrageenan in water at 85-95 ℃ to obtain a carrageenan solution;
2) carrying out suction filtration on the carrageenin solution while the carrageenin solution is hot to obtain a suction filtration solution, adding the barium chloride solution into the suction filtration solution, and uniformly mixing to obtain a mixed solution;
3) and (3) carrying out suction filtration on the mixed solution, washing the jelly obtained by suction filtration with absolute ethyl alcohol, repeating the suction filtration and washing operations for 3-4 times, and drying the obtained suction filtration product to obtain the carrageenan graded by the barium chloride solution.
6. The low smoke zero halogen thermoplastic elastomer fire resistant cable material of claim 4, characterized in that: the metal oxide smoke inhibitor takes polysiloxane oligomer as a surfactant for surface modification; the metal oxide smoke inhibitor is prepared from polysiloxane oligomer (10-20): 1.
7. the low smoke zero halogen thermoplastic elastomer fire resistant cable material according to claim 1, wherein: it also comprises 5-15 parts by weight of thermoplastic polyacrylate rubber.
8. A process for producing a low smoke zero halogen thermoplastic elastomer fire resistant cable material according to any one of claims 1 to 6, comprising the steps of:
s1, mixing a thermoplastic elastomer and a metal oxide smoke suppressant in parts by weight to obtain a primary mixed material:
s2, adding ammonium polyphosphate, carrageenan, stearic acid, an antioxidant and a lubricant into the primary refining material according to the weight parts, and performing mulling and granulation to obtain the low-smoke halogen-free thermoplastic elastomer fire-resistant cable material.
9. The production process of the low-smoke halogen-free thermoplastic elastomer fire-resistant cable material according to claim 8, characterized in that: in step S1, the thermoplastic polyacrylate rubber is kneaded with the thermoplastic elastomer and the metal oxide smoke suppressant.
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| CN114989542A (en) * | 2022-06-20 | 2022-09-02 | 浙江新洁新材料科技有限公司 | PVC modified silica gel hose and production process thereof |
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