CN109988404A - A kind of dedicated sheet molding compound of railway tunnel protective door and preparation method thereof - Google Patents
A kind of dedicated sheet molding compound of railway tunnel protective door and preparation method thereof Download PDFInfo
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- CN109988404A CN109988404A CN201910286300.3A CN201910286300A CN109988404A CN 109988404 A CN109988404 A CN 109988404A CN 201910286300 A CN201910286300 A CN 201910286300A CN 109988404 A CN109988404 A CN 109988404A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/06—Unsaturated polyesters
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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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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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
- C08K2003/2227—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
- C08K3/32—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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- 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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Special Wing (AREA)
- Reinforced Plastic Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of dedicated sheet molding compound of railway tunnel protective door and preparation method thereof, preparation method includes preparing basic resin system, wetting dispersing agent, curing agent, polymerization inhibitor, inner pattern releasing agent applicable, phosphorus flame retardant, filling aluminium hydrate, thickener, the dedicated alkali-free roving of SMC；Basic resin system, wetting dispersing agent, polymerization inhibitor, curing agent are poured into mixing vessel, middling speed disperses 2min, and inner pattern releasing agent applicable, phosphorus flame retardant is then added, moderate-speed mixer 2min, then filling aluminium hydrate is added, high speed dispersion 5-10min is uniformly mixing to obtain mixed material；Mixed material is poured into the resin paste storage tank of SMC sheet unit, it is online that magnesia paste production sheet molding compound is added.The aluminium hydroxide that the present invention is crossed by adding certain amount gradation, a certain number of phosphorus flame retardants are added simultaneously, using composite flame retardant system, the product strength of sheet molding compound molding obtained is high, non-ignitable, oxygen index (OI) reaches 50 or more, can be used for suppressing production railway tunnel protective door.
Description
Technical field
The present invention relates to technical field of composite materials, more particularly to a kind of dedicated sheet of railway tunnel protective door
Moulding compound and preparation method thereof.
Background technique
Sheet molding compound (English name is Sheetmolding compound, abbreviation SMC) is one kind by unsaturated polyester (UP)
The molding raw material that resin, shrinking agent, glass fibre, filler and various auxiliary agents form.It has superior electric property
And corrosion resistance, mechanical performance can compare favourably with part metals material, thus be widely used in haulage vehicle, building,
In the industries such as electric.But sheet molding compound currently on the market requires height to fire-retardant rank, can especially reach non-ignitable
For the SMC system of rank, while there is high intensity again, there is also technical bottlenecks.
Therefore, how the dedicated sheet molding compound of railway tunnel protective door of a kind of good flame retardation effect, good mechanical property is provided,
The technical issues of as those skilled in the art's urgent need to resolve.
Summary of the invention
In view of this, leading to the present invention provides a kind of dedicated sheet molding compound of railway tunnel protective door and preparation method thereof
The aluminium hydroxide crossed of addition certain amount gradation is crossed, while adding a certain number of phosphorus flame retardants, using composite flame retardant system,
Product flame retardant rating is improved, reaches non-ignitable.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of preparation method of the dedicated sheet molding compound of railway tunnel protective door has follow steps:
1) prepare basic resin system, wetting dispersing agent, curing agent, polymerization inhibitor, inner pattern releasing agent applicable, phosphorus flame retardant, hydrogen-oxygen
Change Al filler, thickener, the dedicated alkali-free roving of SMC；And make their weight ratio 100: (2-4): (1-1.5): (0.3-
0.5): (4-5): (10~30): (200-250): (2-2.5): (150-200)；
Preferably, described matrix resin system is by matrix resin and shrinking agent according to (60-70): the weight of (30-40)
Than composition；
Preferably, the weight ratio of wetting agent and dispersing agent is 1: 3 in the wetting dispersing agent；
Preferably, the filling aluminium hydrate is what 8um and 15um gradation was crossed, and weight ratio is (2-3): 1；
2) basic resin system ready in step 1), wetting dispersing agent, curing agent, polymerization inhibitor are poured into mixing vessel
Interior, 600~800rpm middling speed disperses 2-4min, and inner pattern releasing agent applicable, phosphorus flame retardant, the dispersion of 600~800rpm middling speed is then added
2-4min, is then added filling aluminium hydrate, and 900~1300rpm high speed dispersion 5-10min is uniformly mixing to obtain mixed material；
3) mixed material for being uniformly mixing to obtain step 2) pours into the resin paste storage tank of SMC sheet unit, online to add
Enter magnesia paste, in SMC sheet shaping machine set, the mixture of resin paste storage tank is uniformly applied to two sheets film up and down
On, and the dedicated alkali-free roving of SMC is uniformly added into two sheets film, produce the dedicated sheet mould of railway tunnel protective door
Plastics, after molding 40~45 DEG C at a temperature of be thickened 16~40h.
Preferably, matrix resin described in the step 1) is adjacent benzene-type, metaphenylene, isophthalic neopentyl glycol type, ethylene
Base ester type SMC is dedicated to use unsaturated polyester resin.
Preferably, shrinking agent described in the step 1) is saturated polyester class or polystyrene type.
Preferably, phosphorus flame retardant described in the step 1) is polyphosphoric acid ammonium salt and its modifier.
Preferably, inner pattern releasing agent applicable described in the step 1) is stearates.
Preferably, thickener described in the step 1) is the magnesia magma of 50wt%.
Preferably, the viscosity of the obtained mixed material in the step 2) is 1.5Pas~2.5Pas (according to fibre
Depending on dimension hplc is different), moisture content is not higher than 0.1%.
Preferably, control content of glass fiber is (30%~35%) ± 2% in the step 3), not according to material viscosity
With depending on.
It can be seen via above technical scheme that compared with prior art, present invention tool it is following the utility model has the advantages that
1, the aluminium hydroxide that the present invention is crossed by adding certain amount gradation, while adding a certain number of phosphorous flame-retardants
Agent, using composite flame retardant system, the product strength of sheet molding compound molding obtained is high, non-ignitable, and oxygen index (OI) reaches 50 or more, can
For suppressing production railway tunnel protective door.
2, for the present invention by reasonably be combineding with each other with when preparation process, the moulding compound being prepared has excellent machine
Tool performance.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
Embodiment 1
The preparation method of the dedicated sheet molding compound of railway tunnel protective door of the present embodiment has follow steps:
1) prepare basic resin system, wetting dispersing agent, curing agent, polymerization inhibitor, inner pattern releasing agent applicable, phosphorus flame retardant, hydrogen-oxygen
Change Al filler, thickener, the dedicated alkali-free roving of SMC；And make their weight ratio 100: 3: 1.2: 0.35: 4.2: 15:
220:2.2:150；Described matrix resin system is helped by the dedicated unsaturated polyester resin of metaphenylene SMC with polystyrene type lower shrinkage
Agent is formed according to 65: 35 weight ratio；The weight ratio of wetting agent and dispersing agent is 1: 3 in the wetting dispersing agent；The hydrogen-oxygen
Change what Al filler was crossed for 8um and 15um gradation, weight ratio 2:1；
2) basic resin system ready in step 1), wetting dispersing agent, curing agent, polymerization inhibitor are poured into mixing vessel
Interior, 600~800rpm middling speed disperses 2min, and inner pattern releasing agent applicable, phosphorus flame retardant, the dispersion of 600~800rpm middling speed is then added
Then filling aluminium hydrate is added in 2min, 900~1300rpm high speed dispersion, 5~10min is uniformly mixing to obtain mixed material, mixes
It closes object viscosity and is about 1.5Pas or so；
3) mixed material for being uniformly mixing to obtain step 2) pours into the resin paste storage tank of SMC sheet unit, online to add
Enter magnesia paste, in SMC sheet shaping machine set, the mixture of resin paste storage tank is uniformly applied to two sheets film up and down
On, and the dedicated alkali-free roving of SMC is uniformly added into two sheets film, produce the dedicated sheet mould of railway tunnel protective door
Plastics, content of glass fiber are controlled 32% ± 2%；After molding 40~45 DEG C at a temperature of be thickened 20h.
Embodiment 2
The preparation method of the dedicated sheet molding compound of railway tunnel protective door of the present embodiment has follow steps:
1) prepare basic resin system, wetting dispersing agent, curing agent, polymerization inhibitor, inner pattern releasing agent applicable, phosphorus flame retardant, hydrogen-oxygen
Change Al filler, thickener, the dedicated alkali-free roving of SMC；And make their weight ratio 100: 4: 1.5: 0.4: 4.5: 25:
250:2.0:200；Described matrix resin system is poly- by metaphenylene, the dedicated unsaturated polyester resin of vinyl ester type SMC and saturation
Ester type, polystyrene type lower shrinkage auxiliary agent are formed according to 50:10: 15:25 weight ratio；In the wetting dispersing agent wetting agent with
The weight ratio of dispersing agent is 1: 3；What the filling aluminium hydrate was crossed for 8um and 15um gradation, weight ratio 2.5:1；
2) basic resin system ready in step 1), wetting dispersing agent, curing agent, polymerization inhibitor are poured into mixing vessel
Interior, 600~800rpm middling speed disperses 2min, and inner pattern releasing agent applicable, phosphorus flame retardant, the dispersion of 600~800rpm middling speed is then added
Then filling aluminium hydrate is added in 2min, 900~1300rpm high speed dispersion, 5~10min is uniformly mixing to obtain mixed material, mixes
It closes object viscosity and is about 2.0Pas or so；
3) mixed material for being uniformly mixing to obtain step 2) pours into the resin paste storage tank of SMC sheet unit, online to add
Enter magnesia paste, in SMC sheet shaping machine set, the mixture of resin paste storage tank is uniformly applied to two sheets film up and down
On, and the dedicated alkali-free roving of SMC is uniformly added into two sheets film, produce the dedicated sheet mould of railway tunnel protective door
Plastics, content of glass fiber are controlled 30% ± 2%；After molding 40~45 DEG C at a temperature of be thickened 40h.
Embodiment 3
The preparation method of the dedicated sheet molding compound of railway tunnel protective door of the present embodiment has follow steps:
1) prepare basic resin system, wetting dispersing agent, curing agent, polymerization inhibitor, inner pattern releasing agent applicable, phosphorus flame retardant, hydrogen-oxygen
Change Al filler, thickener, the dedicated alkali-free roving of SMC；And make their weight ratio 100: 2: 1: 0.3: 4: 10: 200:2:
180；Described matrix resin system is by metaphenylene, the dedicated unsaturated polyester resin of vinyl ester type SMC and saturated polyester type, polyphenyl
Ethylene type lower shrinkage auxiliary agent is formed according to 55:10: 10:25 weight ratio；Wetting agent and dispersing agent in the wetting dispersing agent
Weight ratio is 1: 3；What the filling aluminium hydrate was crossed for 8um and 15um gradation, weight ratio 3:1；
2) basic resin system ready in step 1), wetting dispersing agent, curing agent, polymerization inhibitor are poured into mixing vessel
Interior, 600~800rpm middling speed disperses 4min, and inner pattern releasing agent applicable, phosphorus flame retardant, the dispersion of 600~800rpm middling speed is then added
Then filling aluminium hydrate is added in 4min, 900~1300rpm high speed dispersion 10min is uniformly mixing to obtain mixed material, mixing
Object viscosity is about 2.0Pas or so；
3) mixed material for being uniformly mixing to obtain step 2) pours into the resin paste storage tank of SMC sheet unit, online to add
Enter magnesia paste, in SMC sheet shaping machine set, the mixture of resin paste storage tank is uniformly applied to two sheets film up and down
On, and the dedicated alkali-free roving of SMC is uniformly added into two sheets film, produce the dedicated sheet mould of railway tunnel protective door
Plastics, content of glass fiber are controlled 31% ± 2%；After molding 40~45 DEG C at a temperature of be thickened 42h.
Embodiment 4
The preparation method of the dedicated sheet molding compound of railway tunnel protective door of the present embodiment has follow steps:
1) prepare basic resin system, wetting dispersing agent, curing agent, polymerization inhibitor, inner pattern releasing agent applicable, phosphorus flame retardant, hydrogen-oxygen
Change Al filler, thickener, the dedicated alkali-free roving of SMC；And make their weight ratio 100: 4: 1.5: 0.5: 5: 30: 250:
2.5:190；Described matrix resin system by metaphenylene, the dedicated unsaturated polyester resin of vinyl ester type SMC and saturated polyester type,
Polystyrene type lower shrinkage auxiliary agent is formed according to 50:5: 15:20 weight ratio；Wetting agent and dispersing agent in the wetting dispersing agent
Weight ratio be 1: 3；What the filling aluminium hydrate was crossed for 8um and 15um gradation, weight ratio 2.5:1；
2) basic resin system ready in step 1), wetting dispersing agent, curing agent, polymerization inhibitor are poured into mixing vessel
Interior, 600~800rpm middling speed disperses 3min, and inner pattern releasing agent applicable, phosphorus flame retardant, the dispersion of 600~800rpm middling speed is then added
3min, is then added filling aluminium hydrate, and 900~1300rpm high speed dispersion 5min is uniformly mixing to obtain mixed material, mixture
Viscosity is about 2.0Pas or so；
3) mixed material for being uniformly mixing to obtain step 2) pours into the resin paste storage tank of SMC sheet unit, online to add
Enter magnesia paste, in SMC sheet shaping machine set, the mixture of resin paste storage tank is uniformly applied to two sheets film up and down
On, and the dedicated alkali-free roving of SMC is uniformly added into two sheets film, produce the dedicated sheet mould of railway tunnel protective door
Plastics, content of glass fiber are controlled 32% ± 2%；After molding 40~45 DEG C at a temperature of be thickened 35h.
Further, performance detection is carried out to the sheet molding compound of above-described embodiment 1-4 preparation, detection method is according to state
Family's standard (referring to table 1), experimental result is referring to table 2:
Table 1
Table 2
It is from table 2 it is known that the dedicated sheet molding compound mechanical performance of railway tunnel protective door prepared by the present invention, fire-retardant
Property has reached national standard, and fire-retardant rank reaches non-ignitable grade.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of dedicated sheet molding compound of railway tunnel protective door, which is characterized in that the raw material including following parts by weight:
Basic resin system 100
Wetting dispersing agent 2-4
Curing agent 1-1.5
Polymerization inhibitor 0.3-0.5
Inner pattern releasing agent applicable 4-5
Phosphorus flame retardant 10-30
Filling aluminium hydrate 200-250
Thickener 2-2.5
The dedicated alkali-free roving 150-200 of SMC.
2. a kind of dedicated sheet molding compound of railway tunnel protective door according to claim 1, which is characterized in that described matrix
Resin system is by matrix resin and shrinking agent according to (60-70): the weight ratio of (30-40) forms.
3. a kind of dedicated sheet molding compound of railway tunnel protective door according to claim 1, which is characterized in that the wetting
The weight ratio of wetting agent and dispersing agent is 1: 3 in dispersing agent.
4. to remove a kind of described in any item dedicated sheet molding compounds of railway tunnel protective door of 1-3 according to right, which is characterized in that
The filling aluminium hydrate is 8um and 15um grades of proportion, and weight ratio is (2-3): 1.
5. a kind of dedicated sheet molding compound of railway tunnel protective door according to claim 4, which is characterized in that described matrix
Resin is adjacent benzene-type, metaphenylene, isophthalic neopentyl glycol type, the dedicated unsaturated polyester resin of vinyl ester type SMC.
6. a kind of dedicated sheet molding compound of railway tunnel protective door according to claim 4, which is characterized in that the low receipts
Contracting agent is saturated polyester class or polystyrene type；The inner pattern releasing agent applicable is stearates；The thickener is 50wt%'s
Magnesia magma.
7. a kind of preparation method of the dedicated sheet molding compound of railway tunnel protective door, which is characterized in that including following preparation step:
1) each raw material for standby described in any one of claims 1-6 is weighed；
2) basic resin system weighed in the step 1), wetting dispersing agent, curing agent, polymerization inhibitor are poured into mixing vessel
Interior, 600~800rpm middling speed disperses 2-4min, and inner pattern releasing agent applicable, phosphorus flame retardant, the dispersion of 600~800rpm middling speed is then added
2-4min, is then added filling aluminium hydrate, and 900~1300rpm high speed dispersion 5-10min is uniformly mixing to obtain mixed material；
3) mixed material that the step 2) obtains is poured into the resin paste storage tank of SMC sheet unit, thickener is then added,
In SMC sheet shaping machine set, the mixture of resin paste storage tank is uniformly applied on two sheets film up and down, and at two
It is uniformly added into the dedicated alkali-free roving of SMC in sheet film, the dedicated sheet molding compound of railway tunnel protective door is produced, after molding
40~45 DEG C at a temperature of be thickened 16~40h to get the dedicated sheet molding compound of railway tunnel protective door.
8. a kind of preparation method of dedicated sheet molding compound of railway tunnel protective door according to claim 7, feature exist
In the viscosity of mixed material obtained in the step 2) is 1.5Pas~2.5Pas, and moisture content is not higher than 0.1%.
9. a kind of preparation method of dedicated sheet molding compound of railway tunnel protective door according to claim 7, feature exist
In control content of glass fiber is 28%-37% in the step 3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910286300.3A CN109988404A (en) | 2019-04-10 | 2019-04-10 | A kind of dedicated sheet molding compound of railway tunnel protective door and preparation method thereof |
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| CN201910286300.3A CN109988404A (en) | 2019-04-10 | 2019-04-10 | A kind of dedicated sheet molding compound of railway tunnel protective door and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303651A (en) * | 2020-03-09 | 2020-06-19 | 句容市久诺复合材料有限公司 | Flame-retardant SMC composite material |
| CN112679904A (en) * | 2020-12-18 | 2021-04-20 | 中国铁建重工集团股份有限公司 | Composite material and manufacturing process and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103160095A (en) * | 2011-12-16 | 2013-06-19 | 常熟市发东塑业有限公司 | Halogen-free high-flame-retardant unsaturated polyester molding compound |
| CN108559230A (en) * | 2018-05-28 | 2018-09-21 | 江苏兆鋆新材料股份有限公司 | Applied to easy coloring lower shrinkage, the high fire-retardance SMC material and preparation method thereof in new energy car battery box |
| CN109456585A (en) * | 2018-10-29 | 2019-03-12 | 江苏常阳科技有限公司 | A kind of fire-retardant sheet molding compound of heat discoloration and preparation method thereof |
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2019
- 2019-04-10 CN CN201910286300.3A patent/CN109988404A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103160095A (en) * | 2011-12-16 | 2013-06-19 | 常熟市发东塑业有限公司 | Halogen-free high-flame-retardant unsaturated polyester molding compound |
| CN108559230A (en) * | 2018-05-28 | 2018-09-21 | 江苏兆鋆新材料股份有限公司 | Applied to easy coloring lower shrinkage, the high fire-retardance SMC material and preparation method thereof in new energy car battery box |
| CN109456585A (en) * | 2018-10-29 | 2019-03-12 | 江苏常阳科技有限公司 | A kind of fire-retardant sheet molding compound of heat discoloration and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111303651A (en) * | 2020-03-09 | 2020-06-19 | 句容市久诺复合材料有限公司 | Flame-retardant SMC composite material |
| CN112679904A (en) * | 2020-12-18 | 2021-04-20 | 中国铁建重工集团股份有限公司 | Composite material and manufacturing process and application thereof |
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Application publication date: 20190709 |