CN104212063A - High-flame-retarding modified polypropylene cable sheath material - Google Patents
High-flame-retarding modified polypropylene cable sheath material Download PDFInfo
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- CN104212063A CN104212063A CN201410486055.8A CN201410486055A CN104212063A CN 104212063 A CN104212063 A CN 104212063A CN 201410486055 A CN201410486055 A CN 201410486055A CN 104212063 A CN104212063 A CN 104212063A
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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
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a high-flame-retarding modified polypropylene cable sheath material. The high-flame-retarding modified polypropylene cable sheath material comprises the following raw materials in parts by weight: 100 parts of polypropylene, 20-35 parts of an ethylene-propylene-diene monomer, 15-22 parts of a novel fire retardant, 1.1-1.5 parts of calcium stearate, 5-10 parts of glass fibers, 3-8 parts of carbon fibers, 5-12 parts of modified calcium carbonate, 3-5 parts of modified mica, 4-10 parts of rice hull powder, 1-3 parts of nano barium sulfate, 3-10 parts of triphenyl phosphate, 1-1.5 parts of aluminum hydroxide, 0.5-1.3 parts of magnesium hydroxide and 2-3 parts of an antioxidant. The high-flame-retarding modified polypropylene cable sheath material has a good flame retarding property, good heat oxidation stability and long service life.
Description
Technical field
The present invention relates to cable jacket material technical field, particularly relate to a kind of high flame retardant modified polypropene cable jacket material.
Background technology
Polypropylene has the following advantages: the resin that all general-purpose plastics Midst density are minimum, and its quality of item is light; Have excellent resistance toheat, can use continuously when temperature 120 DEG C and not easily soften, be cheapest high temperature resistant general-purpose plastics; Have the excellent physical and mechanical properties such as stretching, impact, intensity is higher; There are good resist chemical performance, environmental stress cracking resistance, at normal temperatures, except a small amount of lower molecular weight aliphatic hydrocarbon, aromatic hydrocarbons can soften or swelling, other the substantially insoluble solution of solvent; Higher wear resistance, its product surface is not easy to wear, scratch resistance, can as wear resistant products; Polypropylene product is produced simple and convenient, does not need to dry pre-treatment before production, not easily absorbs water, Heat stability is good, not easily decomposes during process for processing, can not produce corrosion to mould, the mold use life-span can be extended, be widely used in cable jacket material material at present.But polyacrylic oxygen index is very low, easy firing, the flame retardant resistance of existing polypropylene cable sheath material can not meet the needs of society, needs to carry out modification to polypropylene.
Summary of the invention
The present invention proposes a kind of high flame retardant modified polypropene cable jacket material, its good flame resistance, thermo-oxidative stability is good, long service life.
The present invention proposes a kind of high flame retardant modified polypropene cable jacket material, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 20-35 part, BACN 15-22 part, calcium stearate 1.1-1.5 part, glass fibre 5-10 part, carbon fiber 3-8 part, modified calcium carbonate 5-12 part, modified micaceous 3-5 part, powdered rice hulls 4-10 part, nano barium sulfate 1-3 part, triphenylphosphate 3-10 part, aluminium hydroxide 1-1.5 part, magnesium hydroxide 0.5-1.3 part, oxidation inhibitor 2-3 part;
Described BACN is prepared from according to following technique: join in 150-200 part tetracol phenixin by tetramethylolmethane 40-60 part by weight, stirring is warming up to 90-95 DEG C, drip 50-70 part phosphorus oxychloride, time for adding is at 5-6h, is warming up to 98-100 DEG C, passes into back flow reaction 20-30h after nitrogen, be cooled to room temperature, filter after leaving standstill 30-45h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 50-65 DEG C of vacuum-drying 3-6h; In intermediate product, add 20-25 part pyridine and 100-150 part acetonitrile successively, be heated to 50-60 DEG C, stir 30-40min, drip 20-30 part phosphenyl oxychloride, time for adding is 0.8-1.3h, pours in 1000-1500 part distilled water after stirring and refluxing 10-12h, filter, dry after washing.
Preferably, the weight ratio of polypropylene, terpolymer EP rubber, BACN is 100:28-30:18-20.
Preferably, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 28.5-29.5 part, BACN 18.5-19.5 part, calcium stearate 1.2-1.4 part, glass fibre 7-8.5 part, carbon fiber 5-6.3 part, modified calcium carbonate 10-11.5 part, modified micaceous 4-4.6 part, powdered rice hulls 6-7.5 part, nano barium sulfate 1.2-1.8 part, triphenylphosphate 6-8 part, aluminium hydroxide 1.2-1.35 part, magnesium hydroxide 0.8-1.2 part, oxidation inhibitor 2.2-2.6 part.
Preferably, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 29 parts, BACN 18.8 parts, calcium stearate 1.3 parts, 7.8 parts, glass fibre, 5.5 parts, carbon fiber, modified calcium carbonate 10.4 parts, modified micaceous 4.3 parts, powdered rice hulls 7 parts, nano barium sulfate 1.5 parts, triphenylphosphate 7.3 parts, 1.3 parts, aluminium hydroxide, magnesium hydroxide 1.0 parts, 2.4 parts, oxidation inhibitor.
Preferably, described modified calcium carbonate is coupling agent modified, described modified micaceous be coupling agent modified.
Preferably, described coupling agent is silane coupling agent.
Preferably, described oxidation inhibitor is one or more the combination in Hinered phenols stablizer, phosphite-type stabilisers, monothioester kind antioxidant.
Preferably, described BACN is prepared from according to following technique: join in 180-188 part tetracol phenixin by tetramethylolmethane 50-55 part by weight, stirring is warming up to 92-93.5 DEG C, drip 55-60 part phosphorus oxychloride, dripping the 60-65 time is 5.3-5.6h, be warming up to 98.5-99 DEG C, pass into back flow reaction 25-27h after nitrogen, be cooled to room temperature, filter after leaving standstill 33-35h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 60-63 DEG C of vacuum-drying 4-4.3h; In intermediate product, add 22-23 part pyridine and 120-135 part acetonitrile successively, be heated to 52-56 DEG C, stir 33-35min, drip 22-25 part phosphenyl oxychloride, time for adding is 1.0-1.2h, pours in 1200-1350 part distilled water after stirring and refluxing 11-11.5h, filter, dry after washing.
Preferably, described BACN is prepared from according to following technique: join in 186 parts of tetracol phenixin by tetramethylolmethane 52 parts by weight, stirring is warming up to 93 DEG C, and drip 56 parts of phosphorus oxychloride, 63 times that dripped are 5.5h, be warming up to 98.5 DEG C, pass into back flow reaction 26h after nitrogen, be cooled to room temperature, filter after leaving standstill 34h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 62 DEG C of vacuum-drying 4.2h; In intermediate product, add 22.3 parts of pyridines and 125 parts of acetonitriles successively, be heated to 55 DEG C, stir 34min, drip 23 parts of phosphenyl oxychlorides, wherein, time for adding is 1.15h, pours in 1300 parts of distilled water after stirring and refluxing 11h, filters, dry after washing.
Preferably, in the preparation process of BACN, in process dry after washing, wash and become neutral to washings.
In the present invention, BACN is that a kind of thermostability is very high, and become the good fire retardant of charcoal, very stable before 320 DEG C, 320-400 DEG C there is first time decomposition, define phosphoric acid, metaphosphoric acid or polyphosphoric acid, twice decomposition is there is at 400-650 DEG C, the reason of decomposing is because phosphoric acid, the existence of metaphosphoric acid or polyphosphoric acid, further generation dehydration reaction, the layer of charcoal of one deck densification can be formed in polypropylene surface after burning, cover polypropylene surface, with triphenylphosphate, aluminium hydroxide, magnesium hydroxide acts synergistically, modified polypropene is played heat insulation, the effect of oxygen barrier, prevent polyacrylic further burning, the polypropylene that protection is inner, slow down polyacrylic mass loss rate, inhibit the amount of being fuming and speed thereof, generate the carbon-coatings such as the phosphoric acid of thickness and polyphosphoric acid when modified polypropylene thermal decomposes, the speed decreasing skeleton carbon thermo-cracking and the micromolecular volatilization generated, thus facilitate the increase of carbon left, improve flame retardant resistance and thermo-oxidative stability, add terpolymer EP rubber and polypropylene with the use of, further increase the thermo-oxidative stability of modified polypropene, cooperation with the addition of glass fibre, carbon fiber, modified calcium carbonate, modified micaceous powder and the multiple filler of powdered rice hulls and coordinates with polypropylene, various filler is acted synergistically, improves modified polyacrylic rigidity, thermotolerance, glossiness, toughness and load distortion.Test modified polypropylene cable sheath material, the oxygen index of test is 30-37.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail; should understand; embodiment is only for illustration of the present invention, instead of for limiting the present invention, any amendment, equivalent replacement etc. made on basis of the present invention is all in protection scope of the present invention.
Embodiment 1
High flame retardant modified polypropene cable jacket material of the present invention, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 20 parts, BACN 22 parts, calcium stearate 1.1 parts, 10 parts, glass fibre, 3 parts, carbon fiber, modified calcium carbonate 5 parts, modified micaceous 5 parts, powdered rice hulls 10 parts, nano barium sulfate 1 part, triphenylphosphate 3 parts, 1 part, aluminium hydroxide, magnesium hydroxide 0.5 part, 3 parts, oxidation inhibitor;
Described BACN is prepared from according to following technique: join in 150 parts of tetracol phenixin by tetramethylolmethane 60 parts by weight, stirring is warming up to 90 DEG C, drip 70 parts of phosphorus oxychloride, time for adding is 6h, is warming up to 98 DEG C, passes into back flow reaction 30h after nitrogen, be cooled to room temperature, filter after leaving standstill 30h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 65 DEG C of vacuum-drying 3h; 20 parts of pyridines and 100 parts of acetonitriles are added successively in the intermediate product obtained, be heated to 60 DEG C, stir 30min, drip 30 parts of phosphenyl oxychlorides, wherein, time for adding is 0.8h, pour in 1000 parts of distilled water after stirring and refluxing 12h, filter, after filter residue tetracol phenixin is washed 2 times, become neutral, at 50 DEG C of dry 8h with absolute ethanol washing to washings.
Embodiment 2
High flame retardant modified polypropene cable jacket material of the present invention, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 35 parts, BACN 15 parts, calcium stearate 1.5 parts, 5 parts, glass fibre, 8 parts, carbon fiber, modified calcium carbonate 12 parts, modified micaceous 3 parts, powdered rice hulls 4 parts, nano barium sulfate 3 parts, triphenylphosphate 10 parts, 1.5 parts, aluminium hydroxide, magnesium hydroxide 1.3 parts, 2 parts, oxidation inhibitor; Wherein, described modified calcium carbonate is silane coupler modified, described modified micaceous be silane coupler modified; Described oxidation inhibitor is Hinered phenols stablizer;
Described BACN is prepared from according to following technique: join in 200 parts of tetracol phenixin by tetramethylolmethane 40 parts by weight, stirring is warming up to 95 DEG C, drip 50 parts of phosphorus oxychloride, time for adding is 5h, is warming up to 100 DEG C, passes into back flow reaction 20h after nitrogen, be cooled to room temperature, filter after leaving standstill 45h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 50 DEG C of vacuum-drying 6h; 25 parts of pyridines and 150 parts of acetonitriles are added successively in the intermediate product obtained, be heated to 50 DEG C, stir 40min, drip 20 parts of phosphenyl oxychlorides, wherein, time for adding is 1.3h, pour in 1500 parts of distilled water after stirring and refluxing 10h, filter, with neutral in absolute ethanol washing to washings after filter residue tetracol phenixin is washed 5 times, dry 10h under 60 DEG C of conditions.
Embodiment 3
High flame retardant modified polypropene cable jacket material of the present invention, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 29 parts, BACN 18.8 parts, calcium stearate 1.3 parts, 7.8 parts, glass fibre, 5.5 parts, carbon fiber, modified calcium carbonate 10.4 parts, modified micaceous 4.3 parts, powdered rice hulls 7 parts, nano barium sulfate 1.5 parts, triphenylphosphate 7.3 parts, 1.3 parts, aluminium hydroxide, magnesium hydroxide 1.0 parts, 2.4 parts, oxidation inhibitor; Wherein, described modified calcium carbonate is silane coupler modified calcium carbonate, and modified micaceous is silane coupler modified mica, and oxidation inhibitor is the combination of phosphite-type stabilisers and monothioester kind antioxidant; And phosphite kind antioxidant is 1:3 with the ratio of the weight of monothioester kind antioxidant;
Described BACN is prepared from according to following technique: join in 186 parts of tetracol phenixin by tetramethylolmethane 52 parts by weight, stirring is warming up to 93 DEG C, drip 56 parts of phosphorus oxychloride, time for adding is 5.5h, is warming up to 98.5 DEG C, passes into back flow reaction 26h after nitrogen, be cooled to room temperature, filter after leaving standstill 34h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 62 DEG C of vacuum-drying 4.2h; In the intermediate product obtained, add 22.3 parts of pyridines and 125 parts of acetonitriles successively, be heated to 55 DEG C, stir 34min, drip 23 parts of phosphenyl oxychlorides, wherein, time for adding is 1.15h, pours in 1300 parts of distilled water after stirring and refluxing 11h, filter, filter residue tetracol phenixin is washed 3 times, becomes neutral with absolute ethanol washing to washings, put into vacuum drying oven, at 70 DEG C, vacuum-drying 10h.
Claims (10)
1. a high flame retardant modified polypropene cable jacket material, it is characterized in that, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 20-35 part, BACN 15-22 part, calcium stearate 1.1-1.5 part, glass fibre 5-10 part, carbon fiber 3-8 part, modified calcium carbonate 5-12 part, modified micaceous 3-5 part, powdered rice hulls 4-10 part, nano barium sulfate 1-3 part, triphenylphosphate 3-10 part, aluminium hydroxide 1-1.5 part, magnesium hydroxide 0.5-1.3 part, oxidation inhibitor 2-3 part;
Described BACN is prepared from according to following technique: join in 150-200 part tetracol phenixin by tetramethylolmethane 40-60 part by weight, stirring is warming up to 90-95 DEG C, drip 50-70 part phosphorus oxychloride, time for adding is at 5-6h, is warming up to 98-100 DEG C, passes into back flow reaction 20-30h after nitrogen, be cooled to room temperature, filter after leaving standstill 30-45h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 50-65 DEG C of vacuum-drying 3-6h; In intermediate product, add 20-25 part pyridine and 100-150 part acetonitrile successively, be heated to 50-60 DEG C, stir 30-40min, drip 20-30 part phosphenyl oxychloride, time for adding is 0.8-1.3h, pours in 1000-1500 part distilled water after stirring and refluxing 10-12h, filter, dry after washing.
2. high flame retardant modified polypropene cable jacket material according to claim 1, it is characterized in that, the weight ratio of polypropylene, terpolymer EP rubber, BACN is 100:28-30:18-20.
3. high flame retardant modified polypropene cable jacket material according to claim 1 or 2, it is characterized in that, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 28.5-29.5 part, BACN 18.5-19.5 part, calcium stearate 1.2-1.4 part, glass fibre 7-8.5 part, carbon fiber 5-6.3 part, modified calcium carbonate 10-11.5 part, modified micaceous 4-4.6 part, powdered rice hulls 6-7.5 part, nano barium sulfate 1.2-1.8 part, triphenylphosphate 6-8 part, aluminium hydroxide 1.2-1.35 part, magnesium hydroxide 0.8-1.2 part, oxidation inhibitor 2.2-2.6 part.
4. high flame retardant modified polypropene cable jacket material according to any one of claim 1-3, it is characterized in that, its raw material comprises by weight: polypropylene 100 parts, terpolymer EP rubber 29 parts, BACN 18.8 parts, calcium stearate 1.3 parts, 7.8 parts, glass fibre, 5.5 parts, carbon fiber, modified calcium carbonate 10.4 parts, modified micaceous 4.3 parts, powdered rice hulls 7 parts, nano barium sulfate 1.5 parts, triphenylphosphate 7.3 parts, 1.3 parts, aluminium hydroxide, magnesium hydroxide 1.0 parts, 2.4 parts, oxidation inhibitor.
5. high flame retardant modified polypropene cable jacket material according to any one of claim 1-4, is characterized in that, described modified calcium carbonate is coupling agent modified, described modified micaceous be coupling agent modified.
6. high flame retardant modified polypropene cable jacket material according to claim 5, it is characterized in that, described coupling agent is silane coupling agent.
7. high flame retardant modified polypropene cable jacket material according to any one of claim 1-6, is characterized in that, described oxidation inhibitor is one or more the combination in Hinered phenols stablizer, phosphite-type stabilisers, monothioester kind antioxidant.
8. high flame retardant modified polypropene cable jacket material according to any one of claim 1-7, it is characterized in that, described BACN is prepared from according to following technique: join in 180-188 part tetracol phenixin by tetramethylolmethane 50-55 part by weight, stirring is warming up to 92-93.5 DEG C, drip 55-60 part phosphorus oxychloride, dripping the 60-65 time is 5.3-5.6h, be warming up to 98.5-99 DEG C, pass into back flow reaction 25-27h after nitrogen, be cooled to room temperature, filter after leaving standstill 33-35h, by the filter residue rear absolute ethanol washing of dioxane washing, then intermediate product is obtained at 60-63 DEG C of vacuum-drying 4-4.3h, in intermediate product, add 22-23 part pyridine and 120-135 part acetonitrile successively, be heated to 52-56 DEG C, stir 33-35min, drip 22-25 part phosphenyl oxychloride, time for adding is 1.0-1.2h, pours in 1200-1350 part distilled water after stirring and refluxing 11-11.5h, filter, dry after washing.
9. high flame retardant modified polypropene cable jacket material according to claim 8, it is characterized in that, described BACN is prepared from according to following technique: join in 186 parts of tetracol phenixin by tetramethylolmethane 52 parts by weight, stirring is warming up to 93 DEG C, drip 56 parts of phosphorus oxychloride, 63 times that dripped are 5.5h, be warming up to 98.5 DEG C, pass into back flow reaction 26h after nitrogen, be cooled to room temperature, filter after leaving standstill 34h, by the filter residue rear absolute ethanol washing of dioxane washing, then obtain intermediate product at 62 DEG C of vacuum-drying 4.2h; In intermediate product, add 22.3 parts of pyridines and 125 parts of acetonitriles successively, be heated to 55 DEG C, stir 34min, drip 23 parts of phosphenyl oxychlorides, wherein, time for adding is 1.15h, pours in 1300 parts of distilled water after stirring and refluxing 11h, filters, dry after washing.
10. high flame retardant modified polypropene cable jacket material according to any one of claim 1-9, is characterized in that, in the preparation process of BACN, in process dry after washing, washs and becomes neutral to washings.
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| CN104927199A (en) * | 2015-07-10 | 2015-09-23 | 苏州科茂电子材料科技有限公司 | Fiber-reinforced macromolecule cable material and preparing method thereof |
| CN104987598A (en) * | 2015-07-28 | 2015-10-21 | 苏州荣昌复合材料有限公司 | Flame-retardant polypropylene modified plastic |
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| CN109161149A (en) * | 2018-05-29 | 2019-01-08 | 陶玲 | A kind of flame resistant heat insulation material and preparation method thereof |
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