CN114075367A - Impact-resistant epoxy resin composition, impact-resistant film and pressure bottle comprising same - Google Patents
Impact-resistant epoxy resin composition, impact-resistant film and pressure bottle comprising same Download PDFInfo
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- CN114075367A CN114075367A CN202010829445.6A CN202010829445A CN114075367A CN 114075367 A CN114075367 A CN 114075367A CN 202010829445 A CN202010829445 A CN 202010829445A CN 114075367 A CN114075367 A CN 114075367A
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
- F17C1/04—Protecting sheathings
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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
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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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
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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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
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0607—Coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0619—Single wall with two layers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0658—Synthetics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/011—Oxygen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0184—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Abstract
The invention provides an impact-resistant epoxy resin composition, which comprises an epoxy resin and a curing agent; wherein the epoxy resin comprises polyurethane modified epoxy resin, polycarbonate modified epoxy resin, organosilicon modified epoxy resin or the combination thereof; the glass transition temperature of the epoxy resin is 80 ℃ to 120 ℃. The impact-resistant epoxy resin composition can be used for preparing an impact-resistant film with good impact resistance by adopting a simple process, and when the impact-resistant film is coated on a pressure bottle for storing gas, the safety of transportation and storage of the pressure bottle can be improved.
Description
Technical Field
The present invention relates to an epoxy resin composition, an impact-resistant film formed by the epoxy resin composition, and particularly to an impact-resistant film coated on a surface of a container, and a pressure bottle comprising the impact-resistant film.
Background
At present, the main transportation means use traditional fossil energy such as petroleum and coal. For the convenience of daily life, the amount of transportation is greatly increased, but environmental problems are also accompanied. For example, internal combustion engines of automobiles emit Hydrocarbons (HC), nitrogen oxides (NOx), carbon monoxide (CO), and carbon dioxide (CO) in the case of high-temperature combustion and incomplete combustion2) The global warming is caused by the greenhouse effect of the waste gas, and the quality of air is reduced due to the ultrafine suspended particles (PM2.5) generated after combustion, and the human health is harmed.
Due to the rising awareness of environmental protection, electric vehicles and hydrogen fuel cell vehicles are becoming a future trend with considerable development potential. Compared with the defects of long charging time and short endurance distance of an electric vehicle, the hydrogen fuel cell has higher cost and fewer hydrogen stations, but the use mode is closer to the habit of a traditional internal combustion engine vehicle user; particularly, in heavy vehicles such as large buses and trucks which need to travel for a long distance, development of hydrogen fuel cell vehicles is still underway. In the hydrogen fuel cell, hydrogen is used as fuel to supply to the anode of the fuel cell, but because hydrogen itself is flammable and explosive, how to make the pressure bottle for storing hydrogen safer and improve the transportation safety and storage safety of hydrogen fuel becomes one of the research hotspots.
Generally, a pressure cylinder for storing hydrogen is formed of a cylinder wall made of metal or carbon fiber, and an impact-resistant film is coated on an outer surface of the cylinder wall. The main components of the impact-resistant film are Nitrile Butadiene Rubber (NBR) and the like; it can be formed into an impact-resistant film by injection molding and then adhered to the outer surface of the bottle wall; since the impact-resistant film has a fixed planar shape, it is difficult to directly attach the impact-resistant film to the entire three-dimensional bottle wall, and therefore, a process of coating the bottle wall is required to be performed in stages.
The injection molding is to heat and melt the resin composition (usually made into plastic granules) in a charging barrel of an injection molding machine, when the plastic granules are heated to be in a flowing state, the resin composition in the molten state is compressed and quickly injected into a closed mold with a lower temperature, after a certain period of cooling and shaping, the mold is opened to obtain the impact-resistant film. However, in order to meet the size of various pressure bottles, molds of different sizes need to be prepared in advance in the process, which results in a significant increase in manufacturing cost. In addition, if the injection temperature is not properly controlled, the impact-resistant film can be embrittled and the section thickness is not uniform, so that the impact resistance of the impact-resistant film is weakened; in short, such a production method not only increases the production cost of the impact-resistant film, but also may make it difficult to obtain an impact-resistant film having sufficient protective ability.
Disclosure of Invention
In view of the technical defects of the conventional impact-resistant film process, the invention aims to provide an impact-resistant epoxy resin composition, and an impact-resistant film prepared from the composition has good impact resistance.
Another object of the present invention is to provide an impact-resistant epoxy resin composition which can be easily produced in a large scale and has a potential for commercial implementation.
To achieve the above object, the present invention provides an impact-resistant epoxy resin composition, which comprises an epoxy resin and a curing agent; wherein the epoxy resin comprises polyurethane modified epoxy resin, polycarbonate modified epoxy resin, organosilicon modified epoxy resin or the combination thereof; the glass transition temperature (Tg) of the epoxy resin is from 80 ℃ to 120 ℃.
According to the present invention, the impact-resistant epoxy resin composition comprises a soft epoxy resin (i.e., a polyurethane-modified epoxy resin, a polycarbonate-modified epoxy resin, or a silicone-modified epoxy resin, etc.) and controls the glass transition temperature of the epoxy resin in an appropriate range, so that the impact-resistant epoxy resin composition can prepare an impact-resistant film by a two-stage curing method: firstly, coating the impact-resistant epoxy resin composition on a release film (release film), and performing a first-stage curing step to enable the impact-resistant epoxy resin composition to form a gel-like semi-cured (B-stage) film; attaching the non-flowing semi-cured film to the outer surface of the bottle wall of the pressure bottle, wherein the non-flowing semi-cured film can be well adhered to the bottle wall; and then, carrying out a second stage of curing step to completely cure the semi-cured film (also called C-stage) to finally obtain the impact-resistant film. Because the impact-resistant epoxy resin composition forms the semi-cured film firstly, the situation that the liquid epoxy resin composition flows when a single-stage direct curing is adopted and the thickness of the formed impact-resistant film is uneven can be avoided, and the problem that the mechanical strength is insufficient due to the fact that all components in the impact-resistant epoxy resin composition are layered due to different specific gravities and the component distribution of the finally formed impact-resistant film is uneven can also be avoided.
According to the present invention, the epoxy resin is prepared by reacting a reactive terminal group of an organosilicon-modified additive such as Thermoplastic Polyurethane (TPU), polycarbonate (polycarbonate), or polysiloxane with an epoxy group of the epoxy resin to obtain a urethane-modified epoxy resin having a-NHCO-segment in the skeleton and a-O (C) segment in the skeleton, respectively6H4)C(CH3)2(C6H4) Polycarbonate-modified epoxy resins having an OC (═ O) -segment, and silicone-modified epoxy resins having an — Si-O-Si-segment in the skeleton. The flexible segments are provided by modifying additives such as thermoplastic polyurethanes, polycarbonates, polysiloxanes, etc., so that the epoxy resin may have better toughness, and/or impact resistance.
In some embodiments, the impact-resistant epoxy resin composition may comprise different types of epoxy resins simultaneously. For example, the impact-resistant epoxy resin composition may include both the urethane-modified epoxy resin and the silicone-modified epoxy resin, but is not limited thereto.
According to the present invention, the weight-average molecular weight (Mw) of the epoxy resin is not particularly limited; preferably, the epoxy resin has a weight average molecular weight of 600 to 1,200; more preferably, the epoxy resin has a weight average molecular weight of 670 to 1150. In some embodiments, the impact-resistant epoxy resin composition may simultaneously include two or more epoxy resins with different weight average molecular weights, so that the formed impact-resistant film can have higher flexibility.
Preferably, the epoxy resin has an Epoxy Equivalent Weight (EEW) of 200 g/eq to 400 g/eq.
Preferably, the weight ratio of the epoxy resin to the curing agent is 100: 20 to 100: 75. more preferably, the weight ratio of the epoxy resin to the curing agent is 100: 30 to 100: 60.
according to the present invention, the curing agent is not particularly limited; preferably, the curing agent comprises an isocyanate curing agent, an amine curing agent, an anhydride curing agent, or a combination thereof. In some embodiments, the impact-resistant epoxy resin composition may include different kinds of curing agents at the same time, such as a combination of two different isocyanate-based curing agents, a combination of two different amine-based curing agents, or a combination including an isocyanate-based curing agent and an amine-based curing agent, but is not limited thereto.
Specifically, the isocyanate-based curing agent may be a polyisocyanate including, but not limited to, a diisocyanate or triisocyanate, a composition thereof, or an oligomer thereof. The isocyanate curing agent can be aliphatic polyisocyanate or aromatic polyisocyanate. For example, the aliphatic polyisocyanate may be 1,6-hexamethylene diisocyanate (1,6-hexamethylene diisocyanate, HDI), cyclohexane-1, 4-diisocyanate (cyclohexex-1, 4-ylene diisocyanate), or isophorone diisocyanate (5-isocyaato-1- (isocyaato methyl) -1,3, 3-trimethylethylene diisocyanate, IPDI), but is not limited thereto; the aromatic polyisocyanate may be 2, 4-tolylene diisocyanate (2,4-toluene diisocyanate, 2,4-TDI), or 4,4 ' -diphenylmethane diisocyanate (4,4 ' -diphenylmethyl diisocyanate, 4,4 ' -MDI), but is not limited thereto.
Specifically, the amine-based curing agent may be an aliphatic polyamine, an aromatic polyamine, a low molecular weight polyamide, or the like, but is not limited thereto.
Specifically, the acid anhydride curing agent may be phthalic anhydride, methyltetrahydrophthalic anhydride (MTHPA), benzophenonetetracarboxylic dianhydride, or the like, but is not limited thereto.
The impact-resistant epoxy resin composition may further contain additives such as a toughening agent, a filler, and a pigment as required, but is not limited thereto. Specifically, the mechanical property of the impact-resistant film prepared from the impact-resistant epoxy resin composition can be further improved by adding a toughening agent and a filler; or, if the filler such as hollow spheres is added, the heat insulation performance of the impact-resistant film prepared from the impact-resistant epoxy resin composition can be improved; in addition, the pigment can be matched with the use requirement, so that the impact-resistant film formed by the impact-resistant epoxy resin composition can show the color desired by consumers.
The invention also provides an impact-resistant film, which is formed by the impact-resistant epoxy resin composition. Preferably, the impact-resistant film is formed by the two-stage curing method of the impact-resistant epoxy resin composition.
Preferably, the impact-resistant film has a thickness of 2.0 millimeters (mm) to 10.0mm, and more preferably, the impact-resistant film has a thickness of 5.0mm to 6.0 mm.
Preferably, the impact resistant film has a Shore hardness (Shore hardness) of 40A to 80A, and more preferably, the impact resistant film has a Shore hardness of 45A to 75A.
In some embodiments, the impact-resistant epoxy resin composition may be coated on a release film, and the first stage curing step is performed, so that the impact-resistant epoxy resin composition forms a semi-cured film first; the release film may be made of Polyethylene (PE), but is not limited thereto; in addition, designs such as trademarks, characters and the like can be sprayed on the surface of the release film in advance, and then the impact-resistant epoxy resin composition is coated on the surface of the release film; when the impact-resistant epoxy resin composition is subjected to a semi-curing step (i.e., a first-stage curing step in a two-stage curing method) or a complete curing step (i.e., a second-stage curing step in the two-stage curing method, or a direct curing method), the release film containing a design such as a trademark or a character can transfer the trademark or the character to a surface of the formed impact-resistant film, which is in contact with the release film.
According to the present invention, the method for curing the impact-resistant epoxy resin composition may be ultraviolet irradiation (UV irradiation), infrared irradiation (IR irradiation), hot air curing, and the like, but is not limited thereto.
The invention also provides a pressure bottle, which comprises a bottle wall and the impact-resistant film; the bottle wall surrounds an accommodating space; the impact-resistant film is formed on the bottle wall.
Preferably, the bottle wall comprises carbon fiber, metal, glass fiber or a combination thereof, but is not limited thereto.
In some embodiments, the pressure bottle further comprises an element that can assist in the communication or venting of gas within the bottle, such as, but not limited to, a pressure relief valve, a nozzle, a conduit, and the like.
In particular, the pressure bottle may have a cylindrical shape or any desired shape.
According to the present invention, the pressure bottle can be used for containing gases such as hydrogen, oxygen, etc., and can also be used for containing liquid compressed by gas, but is not limited thereto.
Drawings
Fig. 1 is a schematic perspective view of a pressure bottle 1 of the present invention;
fig. 2 is a schematic sectional front view of the pressure bottle 1 of the present invention;
fig. 3 is a graph showing the damping performance analysis of the impact-resistant films of example 1 and comparative example 1.
Detailed Description
The following examples and comparative examples are provided to illustrate the embodiments of the present invention, and those skilled in the art can easily understand the advantages and effects of the present invention through the contents of the present specification, and make various modifications and changes without departing from the spirit of the present invention to implement or apply the contents of the present invention.
Example 1:
impact-resistant epoxy resin composition
Firstly, 100 parts by weight of organic silicon modified epoxy resin is put into a container; wherein the silicone-modified epoxy resin has a glass transition temperature of about 90 ℃, a weight average molecular weight of about 800, and an epoxy equivalent weight of about 240 g/eq; then, 50 parts by weight of amine curing agent and a proper amount of ceramic hollow spheres with the average particle size of 80 microns are added, and the stirring is continued until a uniformly mixed solution is formed, so that the impact-resistant epoxy resin composition is formed. The viscosity of the impact-resistant epoxy resin composition is about 2000 centipoise (cps).
Impact-resistant film
Coating the impact-resistant epoxy resin composition of example 1 on a polyethylene release film to form a coating, and baking the coating at a temperature of 50-60 ℃ for 10-30 minutes to form a semi-cured film; then, baking the semi-cured film at the temperature of 60-90 ℃ for 20-120 minutes to completely cure the film, thus obtaining the impact-resistant film; wherein the impact-resistant film has an average thickness of about 5.0mm and a Shore hardness of about 60A to 80A.
Pressure bottle
Firstly, a cylindrical container is prepared, wherein the side wall of the container contains carbon fibers, and the side wall surrounds an accommodating space. Secondly, the impact-resistant epoxy resin composition of example 1 is coated on a polyethylene release film to form a coating, and the coating is baked for 15 minutes at 60 ℃ to form a semi-cured film; and then, attaching the semi-cured film to the side wall of the cylindrical container to form a composite structure. Subsequently, the composite structure was placed in an oven at 60 ℃ and heated for 30 minutes to completely cure the semi-cured film in the composite structure, and the pressure bottle 1 was obtained. Referring to fig. 1 and 2, a pressure bottle 1 includes a bottle wall 10 and an impact-resistant film 20; the bottle wall 10 surrounds the accommodating space 30, the bottle wall 10 is a side wall of the container, and the impact-resistant film 20 is formed on the bottle wall 10.
Comparative example 1:
the impact-resistant film of comparative example 1 was prepared by a method similar to that of example 1, with the main difference being that the resin composition for preparing the impact-resistant film of comparative example 1 was different. The epoxy resin composition used in comparative example 1 was 100 parts by weight of bisphenol A epoxy resin (product model: DER331), 90 parts by weight of methyltetrahydrophthalic anhydride, and 2 parts by weight of dimethylbenzylamine-containing accelerator (BDMA).
Analysis of characteristics of impact-resistant film
The impact-resistant film formed from the impact-resistant epoxy resin composition of example 1 and the impact-resistant film of comparative example 1 were analyzed in order by the test methods described below. To ensure the experimental significance of the property analysis, each impact-resistant film was analyzed by the same test method. It can be seen that the main characteristic difference between the impact resistant films is derived from the composition difference of the resin composition.
Test example 1: damping Performance analysis (damper test)
The damping performance of the impact resistant films of example 1 and comparative example 1 was measured according to the damping standard test method, and the analysis results are shown in fig. 3.
Discussion of Experimental results
As is apparent from the results of the damping performance analysis shown in FIG. 3, the impact-resistant film of example 1 has a higher and wider tan delta in the normal use temperature range of 30 ℃ to 120 ℃, which indicates that the impact-resistant film of example 1 has a more excellent damping effect at the normal use temperature, and thus it can be confirmed that the impact-resistant epoxy resin composition of the present invention can indeed provide a good impact resistance to the impact-resistant film. Therefore, the impact-resistant membrane of the present invention also necessarily provides sufficient protection for the pressure bottle containing the same, thereby ensuring higher transportation safety and storage safety of the pressure bottle when the pressure bottle is used for containing hydrogen gas in a hydrogen fuel cell.
The above embodiments are merely examples for convenience of description, but the embodiments are not intended to limit the scope of the invention; it is intended that all such alterations, modifications, and other changes which come within the spirit of the invention be embraced by the scope of the invention.
Claims (11)
1. An impact-resistant epoxy resin composition comprising an epoxy resin and a curing agent; wherein the epoxy resin comprises polyurethane modified epoxy resin, polycarbonate modified epoxy resin, organosilicon modified epoxy resin or the combination thereof; the glass transition temperature of the epoxy resin is 80 ℃ to 120 ℃.
2. The impact-resistant epoxy resin composition according to claim 1, wherein the weight-average molecular weight of the epoxy resin is 600 to 1,200.
3. The impact-resistant epoxy resin composition of claim 1, wherein the epoxy resin has an epoxy equivalent weight of 200 g/eq to 400 g/eq.
4. The impact-resistant epoxy resin composition of claim 1, wherein the curing agent comprises an isocyanate-based curing agent, an amine-based curing agent, an anhydride-based curing agent, or a combination thereof.
5. The impact-resistant epoxy resin composition of claim 1, wherein the impact-resistant epoxy resin composition further comprises a toughening agent, a filler, a pigment, or a combination thereof.
6. The impact-resistant epoxy resin composition according to any one of claims 1 to 5, wherein the weight ratio of the epoxy resin to the curing agent is 100: 20 to 100: 75.
7. an impact-resistant film formed from the impact-resistant epoxy resin composition of any one of claims 1 to 6.
8. An impact-resistant film as recited in claim 7, wherein the impact-resistant film has a thickness of 2.0 mm to 10.0 mm.
9. The impact-resistant film of claim 7 or 8, wherein the impact-resistant film has a shore hardness of 40A to 80A.
10. A pressure bottle comprising a bottle wall and an impact-resistant membrane as claimed in any one of claims 7 to 9; the bottle wall surrounds an accommodating space; the impact-resistant film is formed on the bottle wall.
11. The pressure bottle of claim 10, wherein the bottle wall comprises carbon fiber, metal, fiberglass, or a combination thereof.
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