CN113024832A - Gas adsorption composite material, flame-retardant HIPS composite material and display equipment - Google Patents

Gas adsorption composite material, flame-retardant HIPS composite material and display equipment Download PDF

Info

Publication number
CN113024832A
CN113024832A CN202110276720.0A CN202110276720A CN113024832A CN 113024832 A CN113024832 A CN 113024832A CN 202110276720 A CN202110276720 A CN 202110276720A CN 113024832 A CN113024832 A CN 113024832A
Authority
CN
China
Prior art keywords
composite material
gas adsorption
flame
antioxidant
hips
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110276720.0A
Other languages
Chinese (zh)
Other versions
CN113024832B (en
Inventor
孙言丽
任宇飞
赵志远
房晓勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Visual Technology Co Ltd
Original Assignee
Hisense Visual Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hisense Visual Technology Co Ltd filed Critical Hisense Visual Technology Co Ltd
Priority to CN202110276720.0A priority Critical patent/CN113024832B/en
Publication of CN113024832A publication Critical patent/CN113024832A/en
Application granted granted Critical
Publication of CN113024832B publication Critical patent/CN113024832B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
    • C08G83/001—Macromolecular compounds containing organic and inorganic sequences, e.g. organic polymers grafted onto silica
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/06—Elements
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—Silicon- containing compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • 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
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention provides a gas adsorption composite material, a flame-retardant HIPS composite material and display equipment. The gas adsorption composite material is obtained by esterification reaction of polystyrene and an adsorbent. The gas adsorption composite material has good interface binding force with a matrix material, the preparation method is simple and convenient to operate, the preparation efficiency is high, a large amount of organic solvent is not needed in the preparation process, and the pollution to the environment is reduced.

Description

Gas adsorption composite material, flame-retardant HIPS composite material and display equipment
Technical Field
The invention relates to the technical field of display equipment, in particular to a gas adsorption composite material and a preparation method thereof, a flame-retardant HIPS composite material and a preparation method thereof, and display equipment.
Background
The high impact polystyrene material (HIPS) has the advantages of excellent physical and chemical properties, good processing and forming properties, low cost and the like, and is one of common engineering materials for television products. However, because the flame retardant property of the material is poor, a proper amount of flame retardant is often required to be added in the actual use process so as to meet the safety requirements of television products.
In addition, HIPS materials are often precipitated along with other small molecular compounds (such as styrene, benzene, toluene and the like) in the actual synthesis or processing process, and the precipitates of the small molecular compounds and the flame retardant cause pungent odor and harmful substances to be generated in the actual service process of television products, so that the safety and experience of users are seriously influenced.
At present, the odor adsorbent is added in the preparation process of the HIPS material to adsorb small molecular compounds and harmful substances to be volatilized through the odor adsorbent, so that the low-odor and low-VOC effects of the HIPS material are realized. A common odor adsorbent refers to a material having a porous structure capable of adsorbing small molecular substances. Although the odor adsorbent can meet the requirement theoretically, in the actual use process, the problems of poor dispersibility, poor interfacial bonding force with a matrix material HIPS material and the like exist in the material, so that the adsorption effect cannot meet the expected effect and the physical and chemical properties of the product are influenced. In addition, the rear shell of the display device can also cause the low molecular weight substances in the rear shell to be decomposed and separated out again due to the action of high heat and strong shearing force in the injection molding process to form a secondary odor source.
Disclosure of Invention
The invention aims to provide a gas adsorption composite material and a preparation method thereof, a flame-retardant HIPS composite material and a preparation method thereof, and display equipment, so as to solve the problems in the prior art.
In order to solve the technical problems, the invention provides a gas adsorption composite material, and the structural formula of the gas adsorption composite material is as follows:
Figure BDA0002976948100000021
wherein Gn is a polystyrene molecular chain, G is a styrene monomer, and n is an integer;
R(OH)zthe adsorbent is an adsorbent with a porous structure, z and m are integers, and z is more than or equal to m;
the gas adsorption composite material is obtained through esterification reaction of polystyrene and the adsorbent.
In one embodiment, the adsorbent is at least one of diatomaceous earth, activated carbon fiber, or zeolite.
The invention also provides a preparation method of the gas adsorption composite material, and the structural formula of the gas adsorption composite material is as follows:
Figure BDA0002976948100000022
wherein Gn is a polystyrene molecular chain, G is a styrene monomer, and n is an integer;
R(OH)zthe adsorbent is an adsorbent with a porous structure, z and m are integers, and z is more than or equal to m; the preparation method of the gas adsorption composite material comprises the following steps:
weighing 10-50% of the adsorbent and 50-90% of polystyrene in percentage by weight, and uniformly mixing the adsorbent and the polystyrene to obtain a mixture;
and putting the mixture into a double-screw extruder for melt blending, blending for 5-20 min at the screw temperature of 240-260 ℃ and the screw rotating speed of 40-80 rad/s, and performing extrusion, water cooling and granulation to obtain the gas adsorption composite material.
The invention also provides a flame-retardant HIPS composite material, which comprises the following components in percentage by weight:
75-85% of HIPS resin, 1-5% of gas adsorption composite material, 0-2% of antioxidant, 10-20% of flame retardant and 0.1-3% of auxiliary agent; wherein the gas adsorption composite is the gas adsorption composite as described above.
In one embodiment, the gas adsorption composite material is 1 to 3% by weight.
In one embodiment, the antioxidant comprises a primary antioxidant and a secondary antioxidant; the weight ratio of the main antioxidant to the auxiliary antioxidant is 5: 1, the primary antioxidant is a hydrogen-donating antioxidant, and the secondary antioxidant is a peroxide decomposer;
in one embodiment, the primary antioxidant is at least one of a hindered phenolic antioxidant or a secondary amine antioxidant; the auxiliary antioxidant is at least one of phosphide or sulfide oxidative decomposition agent.
In one embodiment, the flame retardant is at least one of polybromodiphenyl ether, tetrabromobisphenol, and hexabromocyclododecane.
The invention also provides a preparation method of the flame-retardant HIPS composite material, which comprises the following steps:
weighing each component in the flame-retardant HIPS composite material according to the flame-retardant HIPS composite material;
drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0;
stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent at 25-35 ℃ for 20-30 minutes, and premixing to obtain a mixture;
the mixture is added into a double-screw extruder for plasticizing, shearing and granulating, wherein the temperature of each section of the screw is 190-.
The invention also provides display equipment which comprises a rear shell, wherein the rear shell is made of the flame-retardant HIPS composite material.
According to the technical scheme, the invention has the advantages and positive effects that:
the gas adsorption composite material of the invention makes the molecular chain of the polymer chemically grafted on the surface of the gas adsorbent through the esterification reaction between the polystyrene and the gas adsorbent, thereby forming the gas adsorption composite material. Therefore, the gas adsorption composite material has good interface bonding force with the matrix material, the preparation method is simple and convenient to operate and high in preparation efficiency, a large amount of organic solvent is not needed in the preparation process, and the pollution to the environment is reduced.
The flame-retardant HIPS composite material has the advantages that the gas adsorption composite material is adopted, the interface bonding force between the gas adsorption composite material and the HIPS resin is good, the physical and chemical properties of the flame-retardant HIPS composite material are good, the adsorption effect is good, and the flame-retardant HIPS composite material is low in subjective smell and low in volatile organic compound content.
The rear shell of the display equipment is made of the flame-retardant HIPS composite material, so that the display equipment is safe and environment-friendly.
Drawings
FIG. 1 is a structural formula of a gas adsorption composite in the present invention;
FIG. 2 is a flow chart of a method of making a gas adsorption composite of the present invention;
FIG. 3 is a flow chart of the method of making the flame retardant HIPS composite of the present invention.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
At present, in order to solve the problems of poor interfacial bonding force between the HIPS material as the base material and the odor adsorbent, the odor adsorbent is usually modified. One of the commonly used methods is to modify the surface of the adsorbent by means of a coupling agent-type surface modification aid through a chemical reaction between a characteristic group at the end of the coupling agent and the odor adsorbent, thereby improving the interfacial bonding force. However, the modification method has harsh preparation conditions and needs a large amount of organic solvent. Other techniques employ preferential modification of the polymer by altering its properties so that it readily reacts with the adsorbent to modify the surface of the adsorbent. The surface modification mode has complex preparation process, needs a large amount of additives, and has the defect of poor compatibility between the polymer grafted on the surface and the HIPS material serving as the matrix material.
Meanwhile, when the problem of combination between the HIPS material as the base material and the odor adsorbent cannot be solved, materials with relatively low pungent odor, such as PC/ABS, are adopted in the industry to replace the flame-retardant HIPS material. However, the scheme has high raw material and processing cost, can only reduce the release of pungent odor, and cannot fundamentally inhibit the volatilization of the pungent small molecular substances.
Therefore, the present application provides a gas adsorption composite material, which is prepared by grafting polymer molecular chains on the surface of an odor adsorbent based on a physical blending process. The gas adsorption composite material has good interface binding force with a matrix material, the preparation method is simple and convenient to operate, the preparation efficiency is high, a large amount of organic solvent is not needed in the preparation process, and the pollution to the environment is reduced.
Referring to fig. 1, the gas adsorption composite of the present application has a structural formula:
Figure BDA0002976948100000051
wherein Gn is a polystyrene molecular chain, and the structural formula is as follows:
Figure BDA0002976948100000052
R(OH)zthe adsorbent has a porous structure, Z and M are integers, and Z is greater than or equal to M.
In the present application, the adsorbent R (OH)zThe inorganic filler has a three-dimensional porous structure, the surface of the material is rich in a large number of hydroxyl groups, and hydrogen bonds exist, and the existence of the groups enables the material to have high surface activity.
In this embodiment, the adsorbent is at least one of diatomaceous earth, zeolite, or activated carbon fiber. That is, any one of them, or any two of them may be used in combination, or all three of them may be used.
The chemical composition of the diatomite is SiO2Mainly, the chemical formula can be SiO2·nH2And O represents. It has a plurality of hydroxyl groups and can therefore be written as general formula R (OH)z。
The general chemical formula of a zeolite is: a. themBpO2p·nH2O, which has a plurality of hydroxyl groups and can therefore also be written as formula R (OH)z. The structural formula of the zeolite is: a. the(x/q)[(AlO2)x(SiO2)y]·n(H2O). Wherein: a is a cation such as Ca, Na, K, Ba, Sr, etc., B is Al and Si, p is the valence of the cation, m is the number of cations, n is the number of water molecules, x is the number of Al atoms, y is the number of Si atoms, (y/x) is usually between 1 and 5, and (x + y) is the number of tetrahedra in the unit cell.
The activated carbon fiber is activated carbon-containing fiber, and certain carbon-containing fiber (such as phenolic fiber, PAN-based fiber, viscose-based fiber, asphalt-based fiber and the like) is activated at high temperature (different activation temperatures of different activation methods) to generate nanoscale pore diameters on the surface of the carbon-containing fiber and increase the specific surface area, so that the physicochemical characteristics of the carbon-containing fiber are changed. The solid surface atoms of the activated carbon fibers are in an unsaturated structure and have unique surface chemical properties, and the microcrystals are easy to react with an oxidation medium at low combustion temperature to generate oxidation products, mainly containing oxygen-containing groups such as carboxyl, phenolic groups, quinonyl and the like, and functional groups such as sulfur-containing groups, nitrogen elements, halogens and the like. In the activation process of the activated carbon fiber, hydroxyl is formed on the surface of the activated carbon fiber through the participation of water.
The gas adsorption composite material is obtained by esterification reaction of polystyrene and an adsorbent R- (OH) m.
The specific reaction is that polystyrene is firstly degraded to generate a molecular chain with free radicals and carbon-carbon double bonds, wherein the free radicals and the carbon-carbon double bonds are subjected to oxidation reaction under the action of oxygen to generate the molecular chain with a carboxyl group (-COOH) at the tail end. The molecular chains with carboxyl groups (-OOH) at the tail ends and the hydroxyl groups (-OH) on the surface of the gas adsorbent are subjected to esterification reaction, so that the polymer molecular chains are chemically grafted on the surface of the gas adsorbent to form the gas adsorption composite material.
Illustratively, the reaction principle of a gas adsorbent of a certain structure with polystyrene is as follows:
Figure BDA0002976948100000061
the structures and characteristic groups of the gas adsorption composite material and the gas adsorbent are used for describing the reaction mechanism, and the specific shapes and the numbers are not specified. That is, the structure of the gas adsorbent may be in other forms, and the number of the hydroxyl groups on the gas adsorbent and the number of the hydroxyl groups subjected to the esterification reaction may be in other numbers.
The method for obtaining the gas adsorption composite material by surface modification of the gas adsorbent is simple and convenient to operate, does not adopt an organic solvent, has no chemical pollution, and can realize customized grafting modification of the gas adsorbent. Wherein, the customization refers to grafting corresponding molecular chains based on different matrix materials.
In this embodiment, the gas adsorption composite material is prepared by melt blending, and based on the high temperature and strong shearing force provided in the melt blending process, polystyrene is chemically grafted and modified on the surface of the gas adsorbent. Specifically, referring to fig. 2, fig. 2 shows a flow chart of a method of making a gas adsorption composite of the present application, comprising the steps of:
the preparation method comprises the following steps:
s11, weighing 10-50% of adsorbent and 50-90% of polystyrene by weight percent, and uniformly mixing the adsorbent and the polystyrene to obtain a mixture.
The inventor of the present application realizes good adsorption effect of the gas adsorption composite material and interface bonding force with the matrix material by strictly designing the contents of the adsorbent and the polystyrene.
S12, putting the mixture into a double-screw extruder for melt blending, blending for 5-20 min at the screw temperature of 240-260 ℃ and the screw rotating speed of 40-80 rad/S, and obtaining the gas adsorption composite material through extrusion, water cooling and granulation.
Wherein, polystyrene is degraded under the action of high temperature and strong shearing force to generate free radicals and molecular chains of carbon-carbon double bonds, and the free radicals and the carbon-carbon double bonds are subjected to oxidation reaction under the action of oxygen to generate carboxyl. The carboxyl and the hydroxyl of the gas adsorbent are subjected to esterification reaction.
Further, after granulation, the method also comprises the following steps:
and S13, dissolving the granulated particles in dimethylformamide, and then, centrifugally washing to obtain the gas adsorption composite material.
Specifically, dimethylformamide is used for eliminating impurities on the surfaces of the granulated particles so as to obtain the gas adsorption composite material with higher purity.
In other embodiments, the gas adsorbing composite may also be prepared by means of physical radiation. Namely, the surface of the polystyrene is subjected to physical irradiation, so that the polystyrene generates active groups, and the esterification reaction between the polystyrene and the gas adsorbent is initiated.
The application also provides a flame-retardant HIPS composite material and a preparation method thereof. The flame-retardant HIPS composite material takes the gas adsorption composite material as a raw material, so that the flame-retardant HIPS composite material is low in subjective smell and low in volatile organic compounds (VOC for short).
Specifically, the flame retardant HIPS composite material comprises the following components in percentage by weight:
75-85% of HIPS resin, 1-5% of the gas adsorption composite material, 0-2% of antioxidant, 10-20% of flame retardant and 0.1-3% of auxiliary agent.
The HIPS resin can be made of materials in the related art, such as: dadada HIPS8265, qimei HIPS88sf, Yangbai HIPS2720, or Shengxi HIPS 1173.
The gas adsorption composite is a gas adsorption composite as provided herein. Further, the weight percentage of the gas adsorption composite material is 1-3%.
The antioxidant comprises a primary antioxidant and a secondary antioxidant. Wherein the weight ratio of the main antioxidant to the auxiliary antioxidant is 5: 1.
the primary antioxidant is a hydrogen-donating antioxidant, and the secondary antioxidant is a peroxide decomposer.
Specifically, the main antioxidant is one or more of hindered phenol antioxidants or secondary amine antioxidants. The auxiliary antioxidant is one or more of phosphide or sulfide oxidative decomposer.
The flame retardant is at least one of polybrominated diphenyl ether, tetrabromobisphenol and hexabromocyclododecane.
The auxiliary agent is at least one of phthalate, terephthalate or phosphate.
The flame-retardant HIPS composite material in the application adopts the gas adsorption composite material, according to the principle of 'similarity and compatibility', grafted materials, namely, polystyrene molecules are arranged between the gas adsorption composite material and base materials, namely, HIPS resin, so that the gas adsorption composite material can be better combined in the HIPS material, the interface bonding force between the gas adsorption composite material and the HIPS resin is better, the physical and chemical properties of the flame-retardant HIPS composite material are better, and the adsorption effect is better.
Referring to fig. 3, fig. 3 shows a flow chart of a method for preparing the flame retardant HIPS composite of the present application, which comprises the following steps:
s21, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S22, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
Specifically, the drying is for removing moisture from the HIPS resin and the gas adsorption composite. Drying can be carried out in a forced air drier.
And S23, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
Specifically, the above materials were thoroughly mixed in a high speed mixer under normal pressure.
S24, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, wherein the temperature of each section of the screw is 190-.
Specifically, an extracting agent is injected into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, vacuum adsorption is carried out in the screw.
Wherein the extractant is at least one of water or carbon dioxide.
The flame-retardant HIPS composite material is simple in process and easy for large-scale production.
The inventor of the application realizes good physicochemical properties and adsorption effect of the flame-retardant HIPS composite material by strictly designing the content of each component, and the content of each component is introduced through each example below.
Example 1
The flame-retardant HIPS composite material comprises, by weight, 78% of HIPS resin, 2% of odor adsorption master batches, 1.5% of antioxidant, 18% of flame retardant and 0.5% of auxiliary agents.
The preparation method of the flame-retardant HIPS composite material comprises the following steps:
s31, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S32, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
And S33, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
And S34, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, injecting extractant water into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, carrying out vacuum adsorption in the screw. The temperature of each section of the screw is 200 ℃ in the first zone, 210 ℃ in the second zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone, and the rotating speed of the screw is 60 r/min. And granulating to obtain the flame-retardant HIPS composite material.
Example 2
The flame-retardant HIPS composite material comprises, by weight, 75% of HIPS resin, 2.5% of odor adsorption master batches, 2% of antioxidants, 18% of flame retardants and 2.5% of auxiliaries.
The preparation method of the flame-retardant HIPS composite material comprises the following steps:
s41, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S42, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
And S43, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
And S44, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, injecting extractant water into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, carrying out vacuum adsorption in the screw. The temperature of each section of the screw is 200 ℃ in the first zone, 210 ℃ in the second zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone, and the rotating speed of the screw is 60 r/min. And granulating to obtain the flame-retardant HIPS composite material.
Example 3
The flame-retardant HIPS composite material comprises, by weight, 80% of HIPS resin, 3% of odor adsorption master batches, 1.5% of antioxidant, 15% of flame retardant and 0.5% of auxiliary agents.
The preparation method of the flame-retardant HIPS composite material comprises the following steps:
s51, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S52, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
And S53, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
And S54, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, injecting extractant water into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, carrying out vacuum adsorption in the screw. The temperature of each section of the screw is 200 ℃ in the first zone, 210 ℃ in the second zone, 220 ℃ in the third zone, 230 ℃ in the fourth zone, and the rotating speed of the screw is 60 r/min. And granulating to obtain the flame-retardant HIPS composite material.
Example 4
The flame-retardant HIPS composite material comprises, by weight, 85% of HIPS resin, 1% of odor adsorption master batch, 1% of antioxidant, 10% of flame retardant and 3% of auxiliary agent.
The preparation method of the flame-retardant HIPS composite material comprises the following steps:
s61, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S62, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
And S63, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
And S64, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, injecting extractant water into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, carrying out vacuum adsorption in the screw. The temperature of each section of the screw is 200 ℃ in the first zone, 230 ℃ in the second zone, 230 ℃ in the third zone, 235 ℃ in the fourth zone, and the rotating speed of the screw is 60 r/min. And granulating to obtain the flame-retardant HIPS composite material.
Example 5
The flame-retardant HIPS composite material comprises, by weight, 80% of HIPS resin, 5% of odor adsorption master batches, 12% of flame retardants and 3% of auxiliaries.
The preparation method of the flame-retardant HIPS composite material comprises the following steps:
s71, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S72, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
And S73, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
And S74, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, injecting extractant water into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, carrying out vacuum adsorption in the screw. The temperature of each section of the screw is 210 ℃ in the first zone, 220 ℃ in the second zone, 230 ℃ in the third zone, 235 ℃ in the fourth zone, and the rotating speed of the screw is 60 r/min. And granulating to obtain the flame-retardant HIPS composite material.
Example 6
The flame-retardant HIPS composite material comprises, by weight, 75% of HIPS resin, 4% of odor adsorption master batches, 0.9% of antioxidant, 20% of flame retardant and 0.1% of auxiliary agents.
The preparation method of the flame-retardant HIPS composite material comprises the following steps:
s81, weighing the components in the flame-retardant HIPS composite material according to the weight percentage of the components in the flame-retardant HIPS composite material.
S82, drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0.
And S83, stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent for 20-30 minutes at 25-35 ℃, and premixing to obtain a mixture.
And S84, adding the mixture into a double-screw extruder, plasticizing, shearing and granulating, injecting extractant water into the front end of the screw in the initial plasticizing stage of the mixture, and after extraction is finished, carrying out vacuum adsorption in the screw. The temperature of each section of the screw is 190 ℃ in the first zone, 210 ℃ in the second zone, 220 ℃ in the third zone, 225 ℃ in the fourth zone, and the rotating speed of the screw is 60 r/min. And granulating to obtain the flame-retardant HIPS composite material.
Comparative example 1
Compared with the common flame-retardant HIPS material sold in the market
The physical and chemical properties of the flame-retardant HIPS composite materials of examples 1 to 6 and the flame-retardant HIPS material of comparative example 1 were tested according to the ASTM D638 standard, and the properties were compared, and the subjective odor was evaluated with reference to the evaluation standards of mass automobiles, as shown in Table 1:
TABLE 1 Properties of flame retardant HIPS composites
Figure BDA0002976948100000121
As can be seen from the above table, the physical and chemical properties of the flame-retardant HIPS composite materials obtained in examples 1-6 can reach or even be superior to those of the commercially available HIPS material in comparative example 1. The TVOC content of the flame-retardant HIPS composite materials in examples 1-6 is reduced to 104.1 mug/kg or lower, and compared with 228.56 mug/kg of comparative example 1, the TVOC content of the flame-retardant HIPS composite material is greatly reduced. And subjective odor evaluation reaches 4 grades, which is superior to that of comparative example 1.
The flame-retardant HIPS composite material can be used for preparing a rear shell of display equipment or a rear back plate of a refrigerator and the like.
Therefore, the invention also provides a display device, and the rear shell of the display device is made of the flame-retardant HIPS composite material, so that the display device is safe and environment-friendly.
According to the technical scheme, the invention has the advantages and positive effects that:
the gas adsorption composite material of the invention makes the molecular chain of the polymer chemically grafted on the surface of the gas adsorbent through the esterification reaction between the polystyrene and the gas adsorbent, thereby forming the gas adsorption composite material. Therefore, the gas adsorption composite material has good interface bonding force with the matrix material, the preparation method is simple and convenient to operate and high in preparation efficiency, a large amount of organic solvent is not needed in the preparation process, and the pollution to the environment is reduced.
The flame-retardant HIPS composite material has the advantages that the gas adsorption composite material is adopted, the interface bonding force between the gas adsorption composite material and the HIPS resin is good, the physical and chemical properties of the flame-retardant HIPS composite material are good, the adsorption effect is good, and the flame-retardant HIPS composite material is low in subjective smell and low in volatile organic compound content.
The rear shell of the display equipment is made of the flame-retardant HIPS composite material, so that the display equipment is safe and environment-friendly.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A gas adsorption composite having the structural formula:
Figure FDA0002976948090000011
wherein Gn is a polystyrene molecular chain, G is a styrene monomer, and n is an integer;
R(OH)zthe adsorbent is an adsorbent with a porous structure, z and m are integers, and z is more than or equal to m;
the gas adsorption composite material is obtained through esterification reaction of polystyrene and the adsorbent.
2. The gas adsorption composite of claim 1, wherein the adsorbent is at least one of diatomaceous earth, activated carbon fiber, or zeolite.
3. A preparation method of a gas adsorption composite material is characterized in that the structural formula of the gas adsorption composite material is as follows:
Figure FDA0002976948090000012
wherein Gn is a polystyrene molecular chain, G is a styrene monomer, and n is an integer;
R(OH)zthe adsorbent is an adsorbent with a porous structure, z and m are integers, and z is more than or equal to m; the preparation method of the gas adsorption composite material comprises the following steps:
weighing 10-50% of the adsorbent and 50-90% of polystyrene in percentage by weight, and uniformly mixing the adsorbent and the polystyrene to obtain a mixture;
and putting the mixture into a double-screw extruder for melt blending, blending for 5-20 min at the screw temperature of 240-260 ℃ and the screw rotating speed of 40-80 rad/s, and performing extrusion, water cooling and granulation to obtain the gas adsorption composite material.
4. The flame-retardant HIPS composite is characterized by comprising the following components in percentage by weight:
75-85% of HIPS resin, 1-5% of gas adsorption composite material, 0-2% of antioxidant, 10-20% of flame retardant and 0.1-3% of auxiliary agent; wherein the gas adsorption composite material is the gas adsorption composite material according to any one of claims 1 to 2.
5. The polystyrene composite of claim 4, wherein the gas adsorption composite is 1 to 3% by weight.
6. The flame retardant HIPS composite of claim 4, wherein the antioxidants comprise primary and secondary antioxidants; the weight ratio of the main antioxidant to the auxiliary antioxidant is 5: 1, the primary antioxidant is a hydrogen-donating antioxidant, and the secondary antioxidant is a peroxide decomposer.
7. The polystyrene composite of claim 6, wherein the primary antioxidant is at least one of a hindered phenolic antioxidant or a secondary amine antioxidant; the auxiliary antioxidant is at least one of phosphide or sulfide oxidative decomposition agent.
8. The polystyrene composite of claim 4, wherein the flame retardant is at least one of polybromodiphenyl ether, tetrabromobisphenol, and hexabromocyclododecane.
9. The preparation method of the flame-retardant HIPS composite material is characterized by comprising the following steps:
weighing each component in the flame-retardant HIPS composite material according to any one of claims 4 to 8;
drying the HIPS resin and the gas adsorption composite material for 12 hours at the temperature of 80 ℃ and the relative humidity of 0;
stirring the dried HIPS resin and the gas adsorption composite material with the antioxidant, the flame retardant and the auxiliary agent at 25-35 ℃ for 20-30 minutes, and premixing to obtain a mixture;
the mixture is added into a double-screw extruder for plasticizing, shearing and granulating, wherein the temperature of each section of the screw is 190-.
10. A display device, comprising a rear shell, wherein the material of the rear shell is the flame retardant HIPS composite material as claimed in any one of claims 4 to 8.
CN202110276720.0A 2021-03-15 2021-03-15 Gas adsorption composite material, flame-retardant HIPS composite material and display equipment Active CN113024832B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110276720.0A CN113024832B (en) 2021-03-15 2021-03-15 Gas adsorption composite material, flame-retardant HIPS composite material and display equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110276720.0A CN113024832B (en) 2021-03-15 2021-03-15 Gas adsorption composite material, flame-retardant HIPS composite material and display equipment

Publications (2)

Publication Number Publication Date
CN113024832A true CN113024832A (en) 2021-06-25
CN113024832B CN113024832B (en) 2022-05-27

Family

ID=76469218

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110276720.0A Active CN113024832B (en) 2021-03-15 2021-03-15 Gas adsorption composite material, flame-retardant HIPS composite material and display equipment

Country Status (1)

Country Link
CN (1) CN113024832B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080312072A1 (en) * 2005-12-27 2008-12-18 Saes Getters S.P.A. Gas Sorbing Composite Systems And Methods For Their Manufacturing
US20160069505A1 (en) * 2013-04-23 2016-03-10 Panasonic Intellectual Property Management Co., Ltd. Insulator including gas adsorbent
WO2017104235A1 (en) * 2015-12-15 2017-06-22 旭ファイバーグラス株式会社 Gas adsorbing material
CN107603111A (en) * 2017-08-17 2018-01-19 合肥会通新材料有限公司 Flame-retardant modified HIPS materials of a kind of low smell, low VOC and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080312072A1 (en) * 2005-12-27 2008-12-18 Saes Getters S.P.A. Gas Sorbing Composite Systems And Methods For Their Manufacturing
US20160069505A1 (en) * 2013-04-23 2016-03-10 Panasonic Intellectual Property Management Co., Ltd. Insulator including gas adsorbent
WO2017104235A1 (en) * 2015-12-15 2017-06-22 旭ファイバーグラス株式会社 Gas adsorbing material
CN107603111A (en) * 2017-08-17 2018-01-19 合肥会通新材料有限公司 Flame-retardant modified HIPS materials of a kind of low smell, low VOC and preparation method thereof

Also Published As

Publication number Publication date
CN113024832B (en) 2022-05-27

Similar Documents

Publication Publication Date Title
CN102234419B (en) Halogen-free flameproof polyphenylene ether resin composition and preparation method thereof
CN108485066B (en) Environment-friendly low-odor polypropylene composite material for vehicles and preparation method thereof
CN107286563B (en) Intumescent flame retardant for ABS electrical switch outer cover and preparation and application thereof
DE10392639T5 (en) Flame retardant composition
CN102746606A (en) Hollow glass bead filling-modified acrylonitrile-butadiene-styrene (ABS) material and preparation method thereof
CN110283415B (en) Thermoplastic elastomer with both conductivity and flame retardance and preparation method thereof
CN106905609A (en) The halogen-free flame-retardant polypropylene composition of the expanding fire retardant of system containing triazine and its preparation
CN103387735A (en) Modified flame retardant ABS resin and preparation method thereof
CN1748001A (en) Halogen free ignition resistant thermoplastic resin compositions
CN112029189A (en) Halogen-free flame-retardant polypropylene composite material and preparation method thereof
CN113024832B (en) Gas adsorption composite material, flame-retardant HIPS composite material and display equipment
CN103756276B (en) The fire-retardant enhancing PC/ABS intermingling material of a kind of high feature of environmental protection and its preparation method
CN108570205B (en) Flame-retardant styrene composition and preparation method thereof
WO1996012597A1 (en) Styrene resin pellets and product of molding thereof
Shu et al. Preparation and properties of bio-based flame retardant polyvinyl alcohol
CN111592742A (en) High-temperature-resistant PPO/PBT material and preparation method thereof
CN113321866A (en) Laser direct forming polypropylene material and preparation method thereof
CN1300238C (en) Magnesium solt whisker rein forced fire-resisting polypropylene composition
CN102863771A (en) Lightweight polycarbonate composition and preparation method thereof
CN115651383A (en) Polycarbonate alloy material and preparation method and application thereof
CN102424715B (en) Hollow glass bead filled modified HIPS material and preparation method thereof
CN109694522B (en) Low-VOC low-odor polypropylene resin composition and preparation method thereof
CN111471265A (en) ABS composition and preparation method thereof
KR101095164B1 (en) A modified carbon nanotube and composition for polymer/carbon nanotube complex comprising the same
CN112724620B (en) Smoke-suppression flame-retardant PET composite material and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant