CN106380711A - Glass fiber-reinforced flame-retardant polystyrene resin composition and preparation method thereof - Google Patents
Glass fiber-reinforced flame-retardant polystyrene resin composition and preparation method thereof Download PDFInfo
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- CN106380711A CN106380711A CN201610736318.5A CN201610736318A CN106380711A CN 106380711 A CN106380711 A CN 106380711A CN 201610736318 A CN201610736318 A CN 201610736318A CN 106380711 A CN106380711 A CN 106380711A
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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
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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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
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention relates to a glass fiber-reinforced flame-retardant polystyrene resin composition, which comprises the following components in weight part: 50-70 parts of polystyrene resin, 11-13 parts of halogenated flame retardant, 3-4 parts of antimonic flame retardant, 6-20 parts of glass fibers, 3-7 parts of flexibilizer, 3-5 parts of compatilizer, 0.2-0.4 part of anti-oxidant, 0.5-1.5 parts of lubricant, and 0.1-0.2 part of anti-dripping agent. According to the technical scheme of the invention, the impact strength of the resin composition is greatly improved. Meanwhile, the defect that the existing glass fiber-reinforced flame-retardant polystyrene resin is poor in impact strength can be overcome. The application range of glass fiber reinforced flame-retardant polystyrene is expanded. The glass fiber-reinforced flame-retardant polystyrene resin provided by the invention is high in impact strength, high in rigidity, high in flame-retardant efficiency, good in flowability, and the like. Meanwhile, the glass fiber-reinforced flame-retardant polystyrene resin has a wide application prospect to meet the market requirements of light weight and thin wall upside to the current trend.
Description
Technical field
The invention belongs to polymeric material field and in particular to a kind of fiberglass reinforced fire retardant polystyrene resin composite and
Its preparation method.
Background technology
Polystyrene belongs to inflammable macromolecular material, be now widely used for electronic apparatus, office equipment, Communication Equipment,
The fields such as household electrical appliance, when having the product of flame-retardancy requirements for electronic apparatus etc., need it is carried out flame-retardant modified, with full
Its use requirement in terms of fire safety of foot；Meanwhile, under the continuous market trend pursuing lightweight and thin-walled property, polyphenyl second
The rigidity of alkene is difficult to meet part performance and requires, and dimensional stability is poor, therefore needs polystyrene is modified, and improves
Its rigidity and dimensional stability, and most effective and inexpensive mode is fiberglass reinforced modification.
At present, the product of flame-proof glass fibre enhancing polystyrene is less, and this is primarily due to polystyrene impact strength itself
Relatively low, fragility is larger, although rigidity and anti-flammability are improved after system adds substantial amounts of glass and fire retardant, but punching
Hit intensity declines substantially it is difficult to meet use requirement.Flame-proof glass fibre is not also had to strengthen the pertinent literature of polystyrene so far,
Research to this respect is most deficient, and the impact strength improving fiberglass reinforced fire retardant polystyrene has become a big technical barrier,
Seriously limit the application of polystyrene.
How to make fiberglass reinforced fire retardant polystyrene also keep higher impact strength while improving rigidity, be current
Flame-proof glass fibre strengthens polystyrene problem demanding prompt solution.The mode improving material system impact strength at present mainly has following two
Kind：1) add toughener or improve toughener number：When a small amount of increase toughener number, system impact strength has small size increasing
Plus, but be also insufficient for use requirement, but toughness reinforcing agent content can not dramatically increase because toughener increase necessarily make rigidity and
Anti-flammability declines, and makes resin lose the meaning of modification.2) in raising system different component the compatibility：That commonly uses at present is compatible
Agent is styrene-maleic anhydride copolymer and acrylonitrile-styrene-copolymer-maleic anhydride, but both compatilizers are to carrying
The impact strength DeGrain of high fiberglass reinforced fire retardant polyphenylacetylene combination.
Content of the invention
The purpose of the present invention be exactly in order to overcome that existing fiberglass reinforced fire retardant polystyrene impact strength is low, poor fluidity,
The less problem of market application, provides and a kind of has high rigidity, high impact, the polystyrene resin composite of high flowing.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of fiberglass reinforced fire retardant polystyrene resin composite, said composition includes following components and weight portion content：
Preferably, described polystyrene resins melt index is 4-12g/10min.
Preferably, described halogenated flame retardant is selected from chlorinated polyethylene, chlorinated paraffin, tetrabromobisphenol A, decabrominated dipheny second
Alkane, brominated triazine, decabromodiphenyl oxide, brominated epoxy resin, Brominated Polystyrene, bromination phenoxy resin, tribromo phosphenylic acid
The mixing of one or more of salt, brominated polycarbonate oligomer.
Preferably, described Sb system fire retardant is one or more of sodium antimonate, antimony oxide, antimony pentoxide
Mixing.
Preferably, described glass fibre is alkali-free glass fibre, a diameter of 10-15um of glass fibre.
Preferably, described toughener is phenylethylene/butadiene, styrene/butadiene/styrene, styrene/isoamyl two
Alkene/styrene, the mixing of one or more of styrene/ethylene-butylene/styrene.
Preferably, described compatilizer is polyphenylene oxide-maleic anhydride, and this compatilizer is greatly improved fiberglass reinforced polyphenyl second
The rigidity of alkene and impact strength, are the optimal choices of this mixed system.
Preferably, described antioxidant is Irganox 1010, Irganox 1076, Irganox 1098 or Irganox
168 one or two mixture.
Preferably, described lubricant be stearic acid, ethylene bis stearamide, modified ethylene bis stearamide, season penta
The mixing of one or more of tetrol stearate, silicone series lubricant agent.
Preferably, described anti-dripping agent be molecular weight 2,000,000-500 ten thousand politef.
Preferably, the also flow ability modifying agent containing 3-5 weight portion in described compositionss, described flow ability modifying agent is phosphoric acid
Triphenylmethyl methacrylate, trimethyl phosphate, triethyl phosphate, phosphoric acid 3,5-dimethylphenyl ester, bisphenol-A-diphenyl phosphate, resorcinol-phosphoric acid
The mixing of one or more of diphenyl ester.
Another object of the present invention is to provide the preparation side of above-mentioned fiberglass reinforced fire retardant polystyrene resin composite
Method, adopts the following technical scheme that：
A kind of preparation method of fiberglass reinforced fire retardant polystyrene resin composite, comprises the following steps：
(1) batch mixing：By 50-70 weight portion polystyrene resins, 11-13 weight portion halogenated flame retardant, 3-4 weight portion antimony system
Fire retardant, 3-7 weight portion toughener, 3-5 parts by weight of compatible agent, 0.2-0.4 weight portion antioxidant, 0.5-1.5 weight portion lubrication
Agent, 0.1-0.2 weight portion anti-dripping agent mix homogeneously；Separately weigh glass fibre 6-20 weight portion；
(2) mixture of step (1) is sent in twin-screw extrusion owner's feeding, glass fibre adds from side feeding,
The shearing of twin screw, conveying, under mixing, fully melt, mixing, then through head extrusion, tie rod, fetch water, pelletizing, drying, finally
It is packaged into finished product；The draw ratio of double-screw extruder screw is 38:1-48:1, extrusion temperature is 180-250 DEG C, and screw speed is
300-600rpm.
Mixing in described step (1) is carried out in high-speed mixer, and the rotating speed of high-speed mixer is 400-1000rpm.
The method that add toughener to improve impact strength commonly used from prior art is different, and the present invention is closed by selection
Suitable compatilizer makes Miscibility increase reach the purpose improving impact strength.Polyphenylene oxide-maleic anhydride and polystyrene,
Glass fibre has the preferable compatibility, and meanwhile, polyphenylene oxide-maleic anhydride also has high impact strength, rigidity, thermal deformation temperature
Degree and good anti-flammability.Therefore, introduce polyphenylene oxide-maleic anhydride as compatilizer, fiberglass reinforced fire retardant can be significantly improved
The impact strength of polystyrene systems, rigidity, heat distortion temperature, make the low problem of fiberglass reinforced fire retardant polystyrene impact strength
It is addressed.The present invention passes through to introduce special compatilizer, substantially increases the compatibility of glass and polystyrene matrix, makes tree
Lipoprotein mixture has high rigidity and impact strength.Meanwhile, the addition of flow ability modifying agent drastically increases resin compound
Mobility, be greatly enhanced flame-proof glass fibre strengthen polystyrene rigidity while, resin also have high impact strength and
Good mobility, solves the problems, such as that the impact strength of fiberglass reinforced polystyrene presence all the time is low, poor processability,
Greatly expand the application that flame-proof glass fibre strengthens polystyrene, compensate at present the vacancy to this respect research both at home and abroad.In mesh
Before trend towards, under lightweight and the market demand of thin-walled property, having broad application prospects.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, some deformation can also be made and improve.These broadly fall into the present invention
Protection category.
According to the proportioning raw materials weighing of embodiment 1-6 and comparative example 1-2, will be fire-retardant to the polystyrene resins weighing up, halogen system
Agent, Sb system fire retardant, toughener, compatilizer, flow ability modifying agent, antioxidant, lubricant stir (rotating speed 400- through high-speed mixer
1000rpm) so as to mix homogeneously, then said mixture is sent in twin-screw extrusion owner's feeding, glass fibre is fed from side
Material adds.The draw ratio of double-screw extruder screw is 38:1-48:1, front-end temperature is 180-220 DEG C, and stage casing temperature is 220-
240 DEG C, head extrusion temperature is 240 DEG C, and screw speed is 300-600rpm.Under the shearing of twin screw, conveying, mixing, fill
Point melt, mixing, then through head extrusion, tie rod, fetch water, pelletizing, drying, be finally packaged into finished product.
The fiberglass reinforced fire retardant polystyrene resins of each embodiment and comparative example preparation are molded into various marks by ASTM standard
The mechanical performance of quasi- Mechanics Performance Testing resin and fire resistance, physical property and method of testing are as shown in table 1.
The quantitative measurement method of the resin that table 1 embodiment 1-6 and comparative example 1-2 prepare
| Physical property | Method of testing |
| Tensile strength (50mm/min) | ASTM D638 |
| Bending strength (2mm/min) | ASTM D790 |
| Melt index (200 DEG C, 5Kg) | ASTM D1238 |
| Heat distortion temperature (1.82MPa) | ASTM D648 |
| IZOD notch impact strength (3.2mm) | ASTM D256 |
| Flammability (vertical combustion 3.0mm/1.5mm) | UL 94 |
Embodiment 1
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 9g/10min；
Halogenated flame retardant is brominated triazine；
Sb system fire retardant is antimony oxide；
Glass fibre is the alkali-free glass fibre of a diameter of 10um；
Toughener is the mixture of styrene/butadiene/styrene and phenylethylene/butadiene；
Compatilizer is polyphenylene oxide-maleic anhydride；
Flow ability modifying agent is triphenyl phosphate；
Antioxidant is Irganox 1010；
Lubricant is the mixture of modified ethylene bis stearamide, pentaerythritol stearate.
The politef that anti-dripping agent is 5,000,000 for molecular weight.
Embodiment 2
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 11g/10min；
Halogenated flame retardant is TDE；
Sb system fire retardant is the mixture of antimony oxide and sodium antimonate；
Glass fibre is the alkali-free glass fibre of a diameter of 10um；
Toughener is styrene/butadiene/styrene；
Compatilizer is polyphenylene oxide-maleic anhydride；
Flow ability modifying agent is triphenyl phosphate；
Antioxidant is the mixture of Irganox 1010 and Irganox 168；
Lubricant is the mixture of modified ethylene bis stearamide, pentaerythritol stearate, silicone master batch.
The politef that anti-dripping agent is 3,500,000 for molecular weight.
Embodiment 3
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 9g/10min；
Halogenated flame retardant is tetrabromobisphenol A；
Sb system fire retardant is antimony pentoxide；
Glass fibre is the alkali-free glass fibre of a diameter of 10um；
Toughener is styrene/isoprene/styrene；
Compatilizer is polyphenylene oxide-maleic anhydride；
Flow ability modifying agent is bisphenol-A-diphenyl phosphate；
Antioxidant is the mixture of Irganox 1010 and Irganox 168；
Lubricant is the mixture of modified ethylene bis stearamide, pentaerythritol stearate.
The politef that anti-dripping agent is 2,000,000 for molecular weight.
Embodiment 4
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 9g/10min；
Halogenated flame retardant is TDE；
Sb system fire retardant is antimony oxide；
Glass fibre is the alkali-free glass fibre of a diameter of 10um；
Toughener is styrene/butadiene/styrene；
Compatilizer is polyphenylene oxide-maleic anhydride；
Flow ability modifying agent is triphenyl phosphate；
Antioxidant is the mixture of Irganox 1010 and Irganox 168；
Lubricant is modified ethylene bis stearamide, the mixture of tetramethylolmethane Hard Fat.
The politef that anti-dripping agent is 4,500,000 for molecular weight.
Embodiment 5
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 4g/10min；
Halogenated flame retardant is brominated triazine；
Sb system fire retardant is the mixture of sodium antimonate and antimony pentoxide；
Glass fibre is the alkali-free glass fibre of a diameter of 13um；
Toughener is styrene/butadiene/styrene；
Compatilizer is polyphenylene oxide-maleic anhydride；
Flow ability modifying agent is triphenyl phosphate；
Antioxidant is the mixture of Irganox 1010 and Irganox 168；
Lubricant is modified ethylene bis stearamide, tetramethylolmethane Hard Fat, the mixture of silicone master batch.
The politef that anti-dripping agent is 2,500,000 for molecular weight.
Embodiment 6
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 9g/10min；
Halogenated flame retardant is brominated triazine；
Sb system fire retardant is antimony oxide；
Glass fibre is the alkali-free glass fibre of a diameter of 10um；
Toughener is the mixture of styrene/butadiene/styrene and phenylethylene/butadiene；
Compatilizer is polyphenylene oxide-maleic anhydride；
Antioxidant is Irganox 1010；
Lubricant is the mixture of modified ethylene bis stearamide, pentaerythritol stearate.
The politef that anti-dripping agent is 5,000,000 for molecular weight.
Comparative example 1
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 11g/10min；
Halogenated flame retardant is brominated triazine；
Sb system fire retardant is antimony oxide；
Glass fibre is the alkali-free glass fibre of a diameter of 13um；
Toughener is styrene/butadiene/styrene；
Antioxidant is the mixture of Irganox 1010 and Irganox 168；
Lubricant is the mixture of modified ethylene bis stearamide and ethylene bis stearamide.
The politef that anti-dripping agent is 5,000,000 for molecular weight.
Comparative example 2
The component of fiberglass reinforced fire retardant polystyrene resin composite and content are：
Wherein：
The melt flow rate (MFR) of polystyrene resins is 9g/10min；
Halogenated flame retardant is brominated triazine；
Sb system fire retardant is antimony oxide；
Glass fibre is the alkali-free glass fibre of a diameter of 11um；
Toughener is styrene/butadiene/styrene；
Compatilizer is styrene-maleic anhydride copolymer；
Antioxidant is Irganox 1010；
Lubricant is the mixture of modified ethylene bis stearamide, pentaerythritol stearate.
The politef that anti-dripping agent is 3,000,000 for molecular weight.
The physical function parameter of the resin that table 2 embodiment 1-6 and comparative example 1-2 prepare
As shown in table 2, result shows the physical property measurement result of embodiment 1-6 and comparative example 1-2, and compatilizer is to fiberglass reinforced
The impact strength of Flame-retardant polystyrene resin and rigidity effects are very big, and polyphenylene oxide-maleic anhydride can be prepared as compatilizer
Go out the flame-proof glass fibre enhancing polystyrene that impact strength is up to 91J/m, solve all the time due to fiberglass reinforced polystyrene
The technical barrier that matter is crisp and limits its application；Meanwhile, the addition of flow ability modifying agent can effectively improve the molten of resin compound
Body flow rate, and then improve processing characteristics and the apparent property of resin.Therefore, the fiberglass reinforced fire retardant polyphenyl of present invention preparation
Ethylene has wide application space.
Claims (10)
1. a kind of fiberglass reinforced fire retardant polystyrene resin composite is it is characterised in that said composition includes following components and weight
Amount part content：
Described compatilizer is polyphenylene oxide-maleic anhydride.
2. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described polyphenyl
Vinyl melt index is 4-12g/10min.
3. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described halogen system
Fire retardant is selected from chlorinated polyethylene, chlorinated paraffin, tetrabromobisphenol A, TDE, brominated triazine, decabromodiphenyl oxide, bromination
In epoxy resin, Brominated Polystyrene, bromination phenoxy resin, tribromo-benzene based phosphates, brominated polycarbonate oligomer one
Plant or several mixing.
4. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described antimony system
Fire retardant is the mixing of one or more of sodium antimonate, antimony oxide, antimony pentoxide.
5. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described glass
Fiber is alkali-free glass fibre, a diameter of 10-15um of glass fibre.
6. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described is toughness reinforcing
Agent is phenylethylene/butadiene, styrene/butadiene/styrene, styrene/isoprene/styrene, styrene/ethylene-fourth
Alkene/cinnamic the mixing of one or more.
7. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described antioxygen
Agent is Irganox 1010, one or two the mixture of Irganox 1076, Irganox 1098 or Irganox 168；
Described lubricant is stearic acid, ethylene bis stearamide, modified ethylene bis stearamide, pentaerythritol stearate, silicon
The mixing of one or more of ketone lubricant.
8. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described resisting is dripped
The agent that falls be molecular weight 2,000,000-500 ten thousand politef.
9. fiberglass reinforced fire retardant polystyrene resin composite according to claim 1 is it is characterised in that described compositionss
In the also flow ability modifying agent containing 3-5 weight portion, described flow ability modifying agent is triphenyl phosphate, trimethyl phosphate, tricresyl phosphate
One or more of ethyl ester, phosphoric acid 3,5-dimethylphenyl ester, bisphenol-A-diphenyl phosphate, resorcinol-diphenyl phosphate mixed
Close.
10. a kind of preparation method of fiberglass reinforced fire retardant polystyrene resin composite is it is characterised in that comprise the following steps：
(1) batch mixing：Will be fire-retardant to 50-70 weight portion polystyrene resins, 11-13 weight portion halogenated flame retardant, 3-4 weight portion antimony system
Agent, 3-7 weight portion toughener, 3-5 parts by weight of compatible agent, 0.2-0.4 weight portion antioxidant, 0.5-1.5 weight portion lubricant,
0.1-0.2 weight portion anti-dripping agent mix homogeneously；Separately weigh glass fibre 6-20 weight portion；
(2) mixture of step (1) is sent in twin-screw extrusion owner's feeding, glass fibre adds from side feeding, in double spiral shells
The shearing of bar, conveying, under mixing, fully melt, mixing, then through head extrusion, tie rod, fetch water, pelletizing, drying, finally pack
Become finished product；The draw ratio of double-screw extruder screw is 38:1-48:1, extrusion temperature is 180-250 DEG C, and screw speed is 300-
600rpm.
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| CN110684267A (en) * | 2019-10-09 | 2020-01-14 | 江苏万纳普新材料科技有限公司 | Special flame-retardant synergistic functional master batch for styrene resin modification and preparation method thereof |
| CN112745591A (en) * | 2020-12-21 | 2021-05-04 | 武汉金发科技有限公司 | Flame-retardant high-rigidity PS/PPE composite material and preparation method and application thereof |
| CN112812454A (en) * | 2021-01-06 | 2021-05-18 | 重庆亦缘鸢科技有限公司 | Glass fiber polystyrene sound-absorbing board |
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