CN105647045A - Compound flame-retardant polystyrene granules and method for preparing same - Google Patents
Compound flame-retardant polystyrene granules and method for preparing same Download PDFInfo
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- CN105647045A CN105647045A CN201610137353.5A CN201610137353A CN105647045A CN 105647045 A CN105647045 A CN 105647045A CN 201610137353 A CN201610137353 A CN 201610137353A CN 105647045 A CN105647045 A CN 105647045A
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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
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
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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
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use 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; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2351/04—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to rubbers
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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
- C08K2201/005—Additives being defined by their particle size in general
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
Abstract
The invention belongs to the technical field of novel materials, and particularly relates to compound flame-retardant polystyrene granules and a method for preparing the same. The compound flame-retardant polystyrene granules comprise, by weight, 70-100 parts of polystyrene, 5-10 parts of foaming agents, 3-7 parts of flame retardants and 5-10 parts of graphite master batch. The method includes (1), mixing the polystyrene, the flame retardants and the graphite master batch with one another in a feeding system; (2), sufficiently melting and mixing materials of various components with one another under the shearing actions of a twin-screw extruder; (3), injecting the foaming agents into the twin-screw extruder; (4), granulating melt at mold plates of an underwater granulator; (5), sieving granulated polystyrene granules by the aid of a vibrating sieving machine, and classifying, weighing and packaging the sieved granules. The compound flame-retardant polystyrene granules and the method have the advantages that technological parameters can be adjusted, so that graphite can adapt to different component proportions without being pre-treated, and heat conductivity coefficients of the compound flame-retardant polystyrene granules can be effectively lowered.
Description
Technical field
The invention belongs to new material technology field, be specifically related to a kind of compositional flame-retardant granules of polystyrene and preparation method thereof.
Background technology
So far, bibliographical information about expandability graphite polystyrene mostly relatively is chemical synthesis, in the process that emulsion synthesizes, graphite particulate is coated in the middle of emulsion by styrene, pentane is passed in the middle of polymerization process or the backward reaction system being polymerized, it is diffused in the middle of granules of polystyrene, thus forming expandability graphite granules of polystyrene. Owing to graphite is that the content of graphite in its product is had large effect with organic polystyrene compatibility by inorganic material. Also needing to that graphite carries out chemical treatment with this type of method production expandability graphite polystyrene makes it have good dispersibility in the middle of styrene emulsion. This mode of production belongs to batch production method, and energy consumption is relatively big, the drawbacks such as production efficiency is relatively low, and graphite dispersion in the middle of raw material is not ideal enough, and production link contaminated wastewater is big.
Summary of the invention
Invention broadly provides a kind of compositional flame-retardant granules of polystyrene and utilize this granule can one-step method extrusion granule method, the modified flame-retardant granules of polystyrene that the method produces, without graphite is carried out pre-treatment, can by the adjustment of technological parameter, it is suitable for different component proportionings, effectively reduces the heat conductivity of granule. Its technical scheme is as follows: a kind of compositional flame-retardant granules of polystyrene, it includes the component of following weight portion: polystyrene 70-100 part, foaming agent 5-10 part, fire retardant 3-7 part, graphite master batch 5-10 part.
A kind of compositional flame-retardant granules of polystyrene, it includes the component of following weight portion: polystyrene 81 parts, foaming agent 7 parts, fire retardant 5 parts, graphite master batch 7 parts.
Preferably, the melt index of described polystyrene is 2-30g/10min.
Preferably, described foaming agent is selected from nitrogen, carbon dioxide, C1-6Alkane, hydrogen fluorohydrocarbon, methane halogenation thing or C1-5The mixture of a kind of or they arbitrary proportions in fatty alcohol.
Preferably, described foaming agent is pentane or butane.
Preferably, described fire retardant is hexabromo dodecane.
Preferably, described graphite master batch is the natural flake graphite of 600-800 order.
The preparation method of a kind of compositional flame-retardant granules of polystyrene, comprises the following steps:
(1) polystyrene of formula ratio, fire retardant, graphite master batch are mixed in feed system;
(2) by the shear action of double screw extruder, the abundant melting mixing of each component materials is made;
(3) foaming agent of formula ratio is injected;
(4) melt pelleter template place under water is by pelletizing;
(5) granules of polystyrene cut out sieves through vibrating sieving machine, and by the granules of screening, is packed by the weighing products of different-grain diameter.
Preferably, in step (2), extruder system extrusion temperature gradually reduces from tail to head, and polystyrene melt flows through heat exchanger, sets thus playing the control to polystyrene melt temperature by changing the temperature of heat exchanger; Extruder barrel heater is divided into 7 heating regions, and its each zone operating temperature is respectively set as: 180 DEG C, 180 DEG C, 175 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and extruder and heat exchanger linkage section temperature are 160 DEG C, and heat exchanger temperature is 140 DEG C.
Preferably; in step (4), Melt Pump can give the melt pressure that underwater pelletizer system template is stable; described Melt Pump pressure is 20-200bar; ensure that the stability of melt in the process of pelletizing under water; atmospheric valve temperature is 170 DEG C, die plate temperature 210-230 DEG C, and recirculated water water temperature is 65-75 DEG C; hydraulic pressure during recirculated water work is 8-12bar, and cutter rotating velocity is depending on the particle situation of actual production.
Polystyrene raw material in the present invention can mix the polystyrene pellets of a small amount of recovery, it is possible to accomplishes to recycle, high-quality environmental protection.
Adopt above-mentioned compositional flame-retardant granules of polystyrene and preparation method thereof, the invention have the advantages that
The method preparing fire retardant polystyrene granule in the present invention has production efficiency height, the diversified feature of formula, its production has seriality and higher production efficiency, method compared to chemosynthesis, extrusion molding produces modified flame-retardant granules of polystyrene can utilize partially recycled polystyrene, can realize recycling, low-carbon environment-friendly can be truly realized, meet the requirement of sustainable development. As a kind of novel modified flame-retardant granules of polystyrene, it is mainly used to produce graphite polystyrene thermal insulation plate, owing to the addition of this material of graphite, and graphite its to infrared, there is good reflection, such that it is able to play effective heat insulation effect. Traditional EPS warming plate heat conductivity is typically in 0.039W/ (m k), and the graphite EPS warming plate in the present invention can reach 0.033W/ (m k), compare under the premise of same heat insulation effect with traditional polystyrene thermal insulation plate, greatly reduce sheet metal thickness, save resource, save space.
Detailed description of the invention
1. the formula of composite granule
A kind of compositional flame-retardant granules of polystyrene, it includes the component of following weight portion: polystyrene 70-100 part, foaming agent 5-10 part, fire retardant 3-7 part, graphite master batch 5-10 part.
2. preparation method
(1) by weight-loss type multicomponent feed system, accurately control the feeding capacity of each component, the polystyrene of formula ratio, fire retardant, graphite master batch are mixed in feed system;
(2) by the shear action of double screw extruder, the abundant melting mixing of each component materials is made;
(3) foaming agent of formula ratio is injected;
(4) melt pelleter template place under water is by pelletizing;
(5) granules of polystyrene cut out sieves through vibrating sieving machine, and by the granules of screening, is packed by the weighing products of different-grain diameter.
The modified flame-retardant granules of polystyrene that aforementioned production method produces can be used for producing B1 level flame-proof sheet material. By adjusting its heat conductivity of content scalable of graphite, regulate the flame retardant effect of the content scalable sheet material of fire retardant, but its maximum expansion ratio can be subject to certain impact. The polystyrene raw material of different melt index also can affect its expansion ratio.
Specific embodiment
Embodiment 1
(1) get the raw materials ready: choose the melt index scope polystyrene raw material at 5.05g/10min, this polystyrene is the polystyrene that model is 158K that Yang Zi BASF AG produces, graphite master batch is the natural flake graphite of 600 orders, fire retardant is hexabromo dodecane, and physical blowing agent adopts pentane;
(2) by weight-loss type multicomponent feed system, accurately controlling the feeding capacity of each component, according to predetermined factory formula, the inventory setting polystyrene resin is 81 weight portions, and the amount of fire retardant is 5 weight portions, and graphite master batch is 7 weight portions.
(3) setting the operating temperature of extruder system each several part: barrel zone temperature respectively 180 DEG C, 180 DEG C, 175 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, set extruder with heat exchanger linkage section temperature as 160 DEG C, arranging heat exchanger temperature is 140 DEG C;
(4) extruder system pressure is regulated, then start to inject foaming agent 7 weight portion, prevent foaming agent from flowing backwards by regulating extruder rotating speed maintenance barrel pressure, extruder system to be carried out suitable temperature adjustment after injecting by foaming agent, thus controlling the die plate pressure of pelleter, to prevent from there is some resistance bigger nozzle when die plate pressure is too low causes pelletizing, the probability of not discharging occurs;
(5) progressively adjusting the atmospheric valve temperature to 170 DEG C of underwater pelletizer system, die plate temperature to 220 DEG C, to adapt to the change of system caused after foaming agent adds. Ensureing that underwater pelletizer system recirculated water hydraulic pressure is 10bar before injecting foaming agent, discharge is at 25m3About/h, the particle vibrating sieving machine cut out sieves, and different-size particles classification is stored temporarily, finally by feeding system, the particle of different size is transported to packer and carries out packaging warehouse-in.
In concrete step (5), screening specification is as shown in table 1 below:
Table 1 sieves specification table
| Specification | Average particle size range (unit: mm) |
| 1 | <0.6 |
| 2 | 0.6��0.9 |
| 3 | 0.9��1.2 |
| 4 | 1.2��1.8 |
| 5 | 1.8��2.2 |
| 6 | >2.2 |
Embodiment 2
(1) get the raw materials ready: choosing Hong Kong Tao Shi polystyrene that model is HIPS6075 produced, graphite master batch is the natural flake graphite of 800 orders, and fire retardant is hexabromo dodecane, and physical blowing agent adopts butane;
(2) by weight-loss type multicomponent feed system, accurately controlling the feeding capacity of each component, according to predetermined factory formula, the amount setting polystyrene resin is 100 weight portions, and the amount of fire retardant is 3 weight portions, and the amount of graphite master batch is 10 weight portions;
(3) setting the operating temperature of extruder system each several part: barrel zone temperature respectively 180 DEG C, 180 DEG C, 175 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, set extruder with heat exchanger linkage section temperature as 160 DEG C, arranging heat exchanger temperature is 140 DEG C;
(4) extruder system pressure is regulated, then start to inject foaming agent 5 weight portion, prevent foaming agent from flowing backwards by regulating extruder rotating speed maintenance barrel pressure, extruder system to be carried out suitable temperature adjustment after injecting by foaming agent, thus controlling the die plate pressure of pelleter, to prevent from there is some resistance bigger nozzle when die plate pressure is too low causes pelletizing, the probability of not discharging occurs;
(5) progressively adjusting the atmospheric valve temperature to 160 DEG C of underwater pelletizer system, die plate temperature to 210 DEG C, to adapt to the change of system caused after foaming agent adds. Ensureing that underwater pelletizer system recirculated water hydraulic pressure is 8bar before injecting foaming agent, discharge is at 25m3About/h, the particle vibrating sieving machine cut out sieves, and different-size particles classification is stored temporarily, finally by feeding system, the particle of different size is transported to packer and carries out packaging warehouse-in.
Embodiment 3
(1) get the raw materials ready: choosing Hong Kong Tao Shi polystyrene that model is HIPS6075 produced, graphite master batch is the natural flake graphite of 700 orders, and fire retardant is hexabromo dodecane, and physical blowing agent adopts the mixture of carbon dioxide and nitrogen;
(2) by weight-loss type multicomponent feed system, accurately controlling the feeding capacity of each component, according to predetermined factory formula, the amount setting polystyrene resin is 70 weight portions, and the amount of fire retardant is 7 weight portions, and the amount of graphite master batch is 5 weight portions;
(3) setting the operating temperature of extruder system each several part: barrel zone temperature respectively 180 DEG C, 180 DEG C, 175 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, set extruder with heat exchanger linkage section temperature as 160 DEG C, arranging heat exchanger temperature is 140 DEG C;
(4) extruder system pressure is regulated, then start to inject foaming agent 10 weight portion, prevent foaming agent from flowing backwards by regulating extruder rotating speed maintenance barrel pressure, extruder system to be carried out suitable temperature adjustment after injecting by foaming agent, thus controlling the die plate pressure of pelleter, to prevent from there is some resistance bigger nozzle when die plate pressure is too low causes pelletizing, the probability of not discharging occurs;
(5) progressively adjusting the atmospheric valve temperature to 180 DEG C of underwater pelletizer system, die plate temperature to 230 DEG C, to adapt to the change of system caused after foaming agent adds. Ensureing that underwater pelletizer system recirculated water hydraulic pressure is 12bar before injecting foaming agent, discharge is at 25m3About/h, the particle vibrating sieving machine cut out sieves, and different-size particles classification is stored temporarily, finally by feeding system, the particle of different size is transported to packer and carries out packaging warehouse-in.
The performance test results
Granules of polystyrene in embodiment 1-3 is carried out performance detection, and result is as shown in table 2:
Table 2 the performance test results
As shown in Table 2, the heat conductivity of the granules of polystyrene in embodiment 1-3 can reach about 0.033, compares under the premise of same heat insulation effect with traditional polystyrene thermal insulation plate, greatly reduces sheet metal thickness, saved resource, save space; Oxygen index (OI) reaches more than 30%, has the fire resistance of excellence, can be used for producing B1 level flame-proof sheet material.
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various corresponding changes and deformation, and all these change and deformation all should belong within the protection domain of the claims in the present invention.
Claims (10)
1. a compositional flame-retardant granules of polystyrene, it includes the component of following weight portion: polystyrene 70-100 part, foaming agent 5-10 part, fire retardant 3-7 part, graphite master batch 5-10 part.
2. compositional flame-retardant granules of polystyrene according to claim 1, it includes the component of following weight portion: polystyrene 81 parts, foaming agent 7 parts, fire retardant 5 parts, graphite master batch 7 parts.
3. compositional flame-retardant granules of polystyrene according to claim 1, it is characterised in that: the melt index of described polystyrene is 2-30g/10min.
4. compositional flame-retardant granules of polystyrene according to claim 1, it is characterised in that: described foaming agent is selected from nitrogen, carbon dioxide, C1-6Alkane, hydrogen fluorohydrocarbon, methane halogenation thing or C1-5The mixture of a kind of or they arbitrary proportions in fatty alcohol.
5. compositional flame-retardant granules of polystyrene according to claim 4, it is characterised in that: described foaming agent is the mixture of the one or both arbitrary proportion in pentane and butane.
6. compositional flame-retardant granules of polystyrene according to claim 1, it is characterised in that: described fire retardant is hexabromo dodecane.
7. compositional flame-retardant granules of polystyrene according to claim 1, it is characterised in that: described graphite master batch is the natural flake graphite of 600-800 order.
8. the method preparing compositional flame-retardant granules of polystyrene as claimed in claim 1, it is characterised in that: comprise the following steps:
(1) polystyrene of formula ratio, fire retardant, graphite master batch are mixed in feed system;
(2) by the shear action of double screw extruder, the abundant melting mixing of each component materials is made;
(3) foaming agent of formula ratio is injected;
(4) melt pelleter template place under water is by pelletizing;
(5) granules of polystyrene cut out sieves through vibrating sieving machine, and by the granules of screening, is packed by the weighing products of different-grain diameter.
9. the preparation method of compositional flame-retardant granules of polystyrene according to claim 8, it is characterized in that: in step (2), extruder system extrusion temperature gradually reduces from tail to head, polystyrene melt flows through heat exchanger, sets thus playing the control to polystyrene melt temperature by changing the temperature of heat exchanger; Extruder barrel heater is divided into 7 heating regions, and its each zone operating temperature is respectively set as: 180 DEG C, 180 DEG C, 175 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and extruder and heat exchanger linkage section temperature are 160 DEG C, and heat exchanger temperature is 140 DEG C.
10. the preparation method of compositional flame-retardant granules of polystyrene according to claim 8; it is characterized in that: in step (4), Melt Pump can give the melt pressure that underwater pelletizer system template is stable; described Melt Pump pressure is 20-200bar; atmospheric valve temperature is 160-180 DEG C; die plate temperature 210-230 DEG C; recirculated water water temperature is 65-75 DEG C, and hydraulic pressure during recirculated water work is 8-12bar.
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| CN106009348A (en) * | 2016-06-20 | 2016-10-12 | 无锡亿利恒新材料科技有限公司 | Inflaming retarding expandable polystyrene containing carbon granules and preparing method thereof |
| CN107522962A (en) * | 2017-09-29 | 2017-12-29 | 浙江帝恒实业有限公司 | A kind of fire-retardant heat insulation plate and preparation method thereof |
| CN107686561A (en) * | 2017-09-26 | 2018-02-13 | 安徽斯威达建材科技有限公司 | A kind of preparation method of graphite polystyrene board |
| CN109762200A (en) * | 2017-11-09 | 2019-05-17 | 四川大学 | Functionality can send out/send out polystyrene bead and preparation method thereof |
| CN109897294A (en) * | 2019-03-05 | 2019-06-18 | 天津格亚德新材料科技有限公司 | A kind of preparation method of ultra-low thermal conductivity expandable polystyrene (EPS) |
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| CN106009348A (en) * | 2016-06-20 | 2016-10-12 | 无锡亿利恒新材料科技有限公司 | Inflaming retarding expandable polystyrene containing carbon granules and preparing method thereof |
| CN107686561A (en) * | 2017-09-26 | 2018-02-13 | 安徽斯威达建材科技有限公司 | A kind of preparation method of graphite polystyrene board |
| CN107522962A (en) * | 2017-09-29 | 2017-12-29 | 浙江帝恒实业有限公司 | A kind of fire-retardant heat insulation plate and preparation method thereof |
| CN107522962B (en) * | 2017-09-29 | 2018-08-28 | 安徽省隆达建材科技有限公司 | A kind of fire-retardant heat insulation plate and preparation method thereof |
| CN109762200A (en) * | 2017-11-09 | 2019-05-17 | 四川大学 | Functionality can send out/send out polystyrene bead and preparation method thereof |
| CN109897294A (en) * | 2019-03-05 | 2019-06-18 | 天津格亚德新材料科技有限公司 | A kind of preparation method of ultra-low thermal conductivity expandable polystyrene (EPS) |
| CN110128061A (en) * | 2019-04-28 | 2019-08-16 | 大城县晟恒保温建材有限公司 | Inorganic fire homogeneous insulation board and preparation method thereof |
| CN111574780A (en) * | 2020-06-30 | 2020-08-25 | 北京奥克森节能环保科技有限公司 | Graphite extruded sheet |
| CN111574780B (en) * | 2020-06-30 | 2021-10-12 | 北京奥克森节能环保科技有限公司 | Graphite extruded sheet |
| CN114984892A (en) * | 2022-06-30 | 2022-09-02 | 广东石油化工学院 | Device for producing graphite foamable polystyrene by using body method |
| CN114984892B (en) * | 2022-06-30 | 2023-10-24 | 广东石油化工学院 | Device for producing graphite foamable polystyrene by bulk method |
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Application publication date: 20160608 |