CN111087760A - Epoxy resin system for wet winding and preparation method and application thereof - Google Patents
Epoxy resin system for wet winding and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/4215—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof cycloaliphatic
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- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/4223—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof aromatic
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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
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
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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
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention specifically relates to an epoxy resin system for wet winding and a preparation method and application thereof, belonging to the technical field of epoxy resin, and the epoxy resin system for wet winding provided by the invention comprises the following components in parts by mass: 100 parts of liquid epoxy resin, 80-90 parts of liquid anhydride curing agent, 1-2 parts of latent accelerator and 10-15 parts of toughening agent, wherein the latent accelerator is a tertiary amine compound, and the toughening agent is elastomer modified epoxy resin prepolymer; the epoxy resin system for wet winding provided by the invention has the performance requirements of viscosity of 400-500mpa.s at the temperature of less than or equal to 25 ℃, pot life of 10h, tensile strength of 80-90MPa, tensile modulus of a casting body of 2.9-3.1GPa and elongation at break of 4-6%, and has the technical effect of low cost.
Description
Technical Field
The invention belongs to the technical field of epoxy resin, and particularly relates to an epoxy resin system for wet winding and a preparation method and application thereof.
Background
Wet winding is to impregnate a fiber bundle (yarn tape) into a resin matrix and then wind the fiber bundle directly onto a core mold under tension control.
The epoxy resin is excellent thermosetting resin, can be combined with curing agents and other additives in various ways to obtain cured products with high mechanical strength, high bonding strength, excellent electrical insulation, chemical resistance, heat resistance and other excellent performances, meets the requirements of different use performances and process performances, and is a resin matrix which is most widely applied at present.
When aluminum alloy is used as the lining, the difference of heat resistance between the winding layer and the aluminum alloy is large, so that the winding layer is required to be cured at low temperature in order to prolong the service life of the winding shell or the container; in order to ensure that the winding shell or the container has excellent fatigue resistance, certain requirements are made on the adhesion between the lining and the winding layer, and further certain toughness requirements are made on the resin matrix of the winding layer; meanwhile, the winding layer also requires the resin matrix to have the properties of low viscosity and long service life at normal temperature.
In the prior art, hydantoin epoxy resin MHR-070 and epoxy resin TDE-85 are mixed according to a certain proportion in poplar, and a self-prepared low-viscosity liquid curing agent and a diluent are added to obtain a resin system suitable for winding molding, wherein the viscosity of the system at 25 ℃ is 609mpa.s, the pot life at 25 ℃ is 2h, the mechanical property, the tensile strength is 93.5MPa, the tensile modulus is 2.7GPa, and the elongation at break is 3.4%.
In patent CN 109054288A, liquid epoxy resin is used to improve the curing crosslinking density of benzoxazine resin, further improve heat resistance, and increase the compatibility of each component of the system; the benzoxazine resin system formed by matching the reactive diluent, the liquid curing agent and the toughening agent has the viscosity of 570-750 mpa.s at 30 ℃, the working life of 12h, the tensile strength of 69MPa, the tensile modulus of 4.5GPa and the elongation at break of 2.1 percent, and the benzoxazine resin system has stable process viscosity and long working life, but has low strength, modulus and toughness and can not meet the requirements of the mechanical properties of the resin.
Disclosure of Invention
In view of the above problems, the present invention has been made in order to provide an epoxy resin system for wet winding, a method for preparing the same, and applications thereof, which overcome the above problems or at least partially solve the above problems.
The embodiment of the invention provides an epoxy resin system for winding by a warm method, which comprises the following components in parts by mass:
the latent accelerator is a tertiary amine compound, and the toughening agent is an elastomer modified epoxy resin prepolymer.
Optionally, the liquid epoxy resin includes at least one of: bisphenol a type liquid epoxy resin, bisphenol F type liquid epoxy resin, glycidyl ester type epoxy resin, aliphatic glycidyl ether epoxy resin.
Optionally, the liquid anhydride curing agent includes at least one of the following: methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, methyl nadic anhydride, nadic anhydride.
Optionally, the latent accelerator is a tertiary amine compound, and the tertiary amine includes at least one of the following: tetramethylethylenediamine, tetramethylhexamethylenediamine, dimethylethanolamine, 1-dimethylamino-3-phenoxypropanol-2.
Optionally, the epoxy equivalent of the elastomer modified epoxy resin prepolymer is 300-400 g/Eq.
Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing an epoxy resin system for wet winding, which is used for preparing the epoxy resin system for wet winding, and includes:
dispersing a latent accelerator in a liquid epoxy resin to obtain a first mixed solution:
uniformly mixing the first mixed solution with a toughening agent to obtain a second mixed solution;
and cooling the second mixed solution, and uniformly mixing the cooled second mixed solution with a liquid anhydride curing agent to obtain the epoxy resin system for wet winding.
Optionally, dispersing the latent accelerator in the liquid epoxy resin to obtain a first mixed solution, including:
dispersing a latent accelerator in liquid epoxy resin at the temperature of 50-70 ℃ to obtain a first mixed solution;
the first mixed solution and the toughening agent are uniformly mixed to obtain a second mixed solution, and the method comprises the following steps:
uniformly mixing the first mixed solution and a toughening agent at the temperature of 50-70 ℃ to obtain a second mixed solution;
the cooling the second mixed liquid includes:
cooling the second mixture to 25-40 ℃.
Based on the same inventive concept, the embodiment of the invention also provides an application of the epoxy resin system for wet winding, and the epoxy resin system for wet winding is applied to a shell or a container which is lined with aluminum alloy.
Optionally, the casing or the container with the aluminum alloy lining comprises a compressed natural gas cylinder with the aluminum alloy lining.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the epoxy resin system for wet winding provided by the embodiment of the invention has the performance requirements of viscosity of 400-500mpa.s at the temperature of less than or equal to 25 ℃, pot life of 10h, tensile strength of 80-90MPa, tensile modulus of a casting body of 2.9-3.1GPa and elongation at break of 4-6%, and has the technical effect of low cost.
The above description is only an overview of the present invention,
in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the specification, and in order to make the above and other objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described below.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
It should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Meanwhile, the terms "first", "second", etc. in the present invention do not denote any order or order, and these words may be interpreted as names.
In order to solve the technical problems, the technical scheme in the embodiment of the invention has the following general idea:
the embodiment provides an epoxy resin system for wet winding, which comprises the following components in parts by mass:
the latent accelerator is a tertiary amine compound, and the toughening agent is an elastomer modified epoxy resin prepolymer.
According to the technical scheme, the epoxy resin with high mechanical strength is cured at high temperature with a curing agent, the requirement of a wound compressed natural gas cylinder on the high strength of a resin matrix can be met, a tertiary amine accelerator is introduced, tertiary amine and acid anhydride generate carbonium anions in the curing process, the anions react with epoxy groups to generate alkoxy anions, the alkoxy anions react with the acid anhydride to generate carbonium anions, the reaction is sequentially carried out, a three-dimensional cross-linked network structure is formed, and finally the epoxy resin is cured and has high cross-linking density and high mechanical strength. In order to ensure that the viscosity of a resin system is low, liquid epoxy resin is specially selected, and the viscosity is low after the liquid epoxy resin is mixed with anhydride; in order to obtain a long service life, a latent acid anhydride accelerator is introduced, the curing reaction of resin and acid anhydride can not be promoted stably at normal temperature, when the temperature is higher than 100 ℃, thermal dissociation is carried out under heating, tertiary amine is dissociated, and the alternating crosslinking reaction of the acid anhydride and the epoxy resin is promoted, so that a resin system introduced with the accelerator has the characteristics of small viscosity and long service life at 25 ℃. In order to make the resin system have certain toughness, the toughening agent is introduced, the epoxy resin prepolymer is modified by the elastomer, and the molecular chain of the epoxy resin prepolymer has epoxy groups, so that the epoxy resin prepolymer can be well dissolved with the epoxy resin, and the capability of forming a micro-cavity structure in the resin system can be realized, thereby relieving the crosslinking density of a resin casting body and improving the brittleness of the resin casting body.
The dosage of the epoxy resin is taken as a certain amount, the dosage of the curing agent is low, the crosslinking reaction degree of the curing agent and the epoxy resin is low, and the crosslinking density of a resin casting body can be greatly reduced, so that the mechanical property of the resin casting body is reduced; the curing agent has high dosage, high crosslinking reaction degree and large crosslinking density of the resin casting body, so that the resin casting body has large rigidity and poor toughness, and the dosage of the curing agent is locked in the range of 80-90 parts. The dosage of the accelerator is controlled within 1-2 parts and less than 1 part, so that the curing reaction time is prolonged, and the production time cost of the product is increased; the dosage is more than 2 parts, the accelerating effect is obviously accelerated, so that the resin and the curing agent are subjected to a crosslinking reaction quickly, and finally, the resin casting body is high in crosslinking density and poor in toughness. The introduced amount of the toughening agent is small, and the effect of improving the toughness of the resin casting body is not obvious; the introduction amount is large, and because the epoxy equivalent is large, the epoxy group in a molecular chain is less, the crosslinking reaction degree with a curing agent is low, the mechanical strength of a resin casting body can be reduced, and the toughening agent is specially locked at 10-15 parts to ensure that the resin casting body has certain toughness on the premise of excellent mechanical property.
In some alternative embodiments, the liquid epoxy resin includes at least one of: bisphenol a type liquid epoxy resin, bisphenol F type liquid epoxy resin, glycidyl ester type epoxy resin, aliphatic glycidyl ether epoxy resin. .
In the aspect of economic cost, the epoxy resin has high yield and low cost, is the matrix resin with the largest consumption in thermosetting resin, and is selected to reduce the cost of a resin system; in view of the requirement of low viscosity of the resin system 25, the solid epoxy resin is mixed with the acid anhydride curing agent after melting, and the liquid epoxy resin is selected because the viscosity is still high and the fluidity is poor at normal temperature.
In some alternative embodiments, the liquid anhydride-based curing agent includes at least one of: methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, methyl nadic anhydride, nadic anhydride.
In terms of mechanical properties, the amine curing agent and the anhydride curing agent can generate a crosslinking reaction in the epoxy resin, and the resin casting body can have higher mechanical strength; however, in view of toxicity, the amine curing agent has higher toxicity and irritation than the anhydride curing agent, and generates toxic and harmful substances for human bodies and the environment.
In some alternative embodiments, the latency promoter is a tertiary amine compound, the tertiary amine comprising at least one of: tetramethyl diethylamine, tetramethyl hexylethylamine, dimethylethanolamine, 1-dimethylamino-3-phenoxypropanol-2.
The tertiary amine compound has stable performance at 25 ℃ and does not generate promotion effect, when the temperature is higher than 100 ℃, the amine compound is heated to generate thermal dissociation, the tertiary amine is dissociated, and the resin and the acid anhydride are promoted to carry out crosslinking reaction, so that the resin system has the characteristic of long service life at normal temperature. The tertiary amine can be used as an accelerator of the anhydride curing agent to promote the crosslinking reaction between the anhydride and the resin. The accelerating effect of tertiary amine on the curing reaction is related to the electron density and the molecular chain length of nitrogen atoms in the molecular structure of the tertiary amine, the accelerating effect is larger when the electron density on the nitrogen atoms is larger and the molecular chain is smaller, so that the tertiary amine with the large electron density on the short molecular chain and the nitrogen atoms is selected to synthesize the amine compound as the latent anhydride accelerator.
In some alternative embodiments, the epoxy equivalent weight of the elastomer-modified epoxy resin prepolymer is 300-400 g/Eq.
The toughening agent is prepared by polyether amine flexible chain segment modified epoxy resin, the molecular structure of the toughening agent contains a small amount of epoxy groups, the epoxy group has a certain epoxy equivalent, when the epoxy equivalent is lower than 300g/Eq, the epoxy group content in the molecular structure of the epoxy resin is high, the modified degree is low, the molecular chain is still longer, and the toughening effect cannot be achieved; when the epoxy equivalent is higher than 400g/Eq, the epoxy group content in the molecular structure of the epoxy resin is too low, the modified degree is high, the short molecular chain content is high, and a crosslinked network structure is difficult to form in the curing process, so that the mechanical strength of a resin casting body is reduced.
Based on the same inventive concept, an embodiment of the present invention further provides a method for preparing an epoxy resin system for wet winding, which is used for preparing the epoxy resin system for wet winding, and includes:
dispersing a latent accelerator in liquid epoxy resin to obtain a first mixed solution;
uniformly mixing the first mixed solution with a toughening agent to obtain a second mixed solution;
and cooling the second mixed solution, and uniformly mixing the cooled second mixed solution with a liquid anhydride curing agent to obtain the epoxy resin system for wet winding.
In some alternative embodiments, the dispersing the latent accelerator in the liquid epoxy resin to obtain a first mixed solution includes:
dispersing a latent accelerator in liquid epoxy resin at the temperature of 50-70 ℃ to obtain a first mixed solution;
the first mixed solution and the toughening agent are uniformly mixed to obtain a second mixed solution, and the method comprises the following steps:
uniformly mixing the first mixed solution and a toughening agent at the temperature of 50-70 ℃ to obtain a second mixed solution;
the cooling the second mixed liquid includes:
cooling the second mixture to 25-40 ℃.
In order to avoid the generation of carbonium anions by the reaction of the accelerant and anhydride, the accelerant and resin are mixed into a first mixed solution at the temperature of 50-70 ℃, the powdery or liquid accelerant can be uniformly dispersed in the resin at the temperature, and the powdery accelerant is easy to agglomerate and is not uniformly dispersed when the temperature is too low; when the temperature is too high, the accelerator gradually becomes more active by heating and slowly thermally dissociates the tertiary amine, so that the temperature is determined to be in the range of 50 to 70 ℃. Similarly, the temperature is controlled within the above temperature range while continuing to mix the epoxy group-containing toughening agent. And finally, when the anhydride curing agent is added, in order to avoid overhigh temperature, the curing reaction of the anhydride and the resin is promoted in the stirring process, and the temperature of the solution is cooled to be below 40 ℃.
Based on the same inventive concept, the embodiment of the invention also provides application of the epoxy resin system for wet winding, and the epoxy resin system for wet winding is applied to the compressed natural gas storage cylinder with the aluminum alloy as the lining.
The resin system has small viscosity under 25 degrees and long working life, reduces the alternation times of a new resin system and an old resin system when being used for the production of large compressed natural gas storage cylinders, meets the process requirement of low-viscosity winding for a long time, and improves the working efficiency; the resin system has high strength, high toughness and medium-temperature curing temperature, improves the fatigue resistance, impact resistance and other properties of the gas cylinder in the using process, and prolongs the service life of the gas cylinder; the resin system has low production cost, thereby reducing the production cost of the gas bomb and having remarkable economic profit.
In some alternative embodiments, the aluminum alloy lined shell or vessel comprises an aluminum alloy lined compressed natural gas cylinder.
In this example, the curing conditions of the epoxy resin system for wet winding were as follows:
the curing temperature is 110-130 ℃, and the curing time is 4-5 h.
The following will explain the epoxy resin system for wet winding provided by the embodiment of the invention, its preparation method and application in detail by combining the embodiment and experimental data.
Example 1:
an epoxy resin system for wet winding comprises the following materials in parts by weight:
curing conditions are as follows: curing for 5h at 130 ℃;
the viscosity of the glue solution of the resin system at 25 ℃ is 410mpa.s, and the pot life is 12 h; the tensile strength of the cast product was 87.12MPa, the tensile modulus was 3.12GPa, and the elongation at break was 4.82%.
Example 2:
an epoxy resin system for wet winding comprises the following materials in parts by weight:
curing conditions are as follows: curing for 5h at 130 ℃;
the viscosity of the glue solution of the resin system at 25 ℃ is 489mpa.s, and the pot life is 10.5 h; the tensile strength of the cast product was 85.37MPa, the tensile modulus was 2.99GPa, and the elongation at break was 5.12%.
Example 3:
an epoxy resin system for wet winding comprises the following materials in parts by weight:
curing conditions are as follows: curing for 4h at 120 ℃;
the viscosity of the glue solution of the resin system at 25 ℃ is 548mpa.s, and the pot life is 10 h; the tensile strength of the cast product was 82.48MPa, the tensile modulus was 3.06GPa, and the elongation at break was 5.86%.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The epoxy resin system for wet winding is characterized by comprising the following components in parts by mass:
the latent accelerator is a tertiary amine compound, and the toughening agent is an elastomer modified epoxy resin prepolymer.
2. The wet-winding epoxy resin system according to claim 1, wherein the liquid epoxy resin comprises at least one of: bisphenol a type liquid epoxy resin, bisphenol F type liquid epoxy resin, glycidyl ester type epoxy resin, aliphatic glycidyl ether epoxy resin.
3. The epoxy resin system for wet winding according to claim 1, wherein the liquid acid anhydride curing agent comprises at least one of: methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, methyl nadic anhydride, nadic anhydride.
4. The epoxy resin system for wet winding according to claim 1, wherein the latent accelerator is a tertiary amine compound, and the tertiary amine comprises at least one of: tetramethylethylenediamine, tetramethylhexamethylenediamine, dimethylethanolamine, 1-dimethylamino-3-phenoxypropanol-2.
5. The epoxy resin system for wet winding as claimed in claim 1, wherein the epoxy equivalent of the elastomer-modified epoxy resin prepolymer is 300-400 g/Eq.
6. A method for preparing the epoxy resin system for wet winding according to any one of claims 1 to 5, comprising:
dispersing a latent accelerator in liquid epoxy resin to obtain a first mixed solution;
uniformly mixing the first mixed solution with a toughening agent to obtain a second mixed solution;
and cooling the second mixed solution, and uniformly mixing the cooled second mixed solution with a liquid anhydride curing agent to obtain the epoxy resin system for wet winding.
7. The method for preparing the epoxy resin system for wet winding according to claim 6, wherein the step of dispersing the latent accelerator in the liquid epoxy resin to obtain a first mixed solution comprises:
dispersing a latent accelerator in liquid epoxy resin at the temperature of 50-70 ℃ to obtain a first mixed solution;
the first mixed solution and the toughening agent are uniformly mixed to obtain a second mixed solution, and the method comprises the following steps:
uniformly mixing the first mixed solution and a toughening agent at the temperature of 50-70 ℃ to obtain a second mixed solution;
the cooling the second mixed liquid includes:
cooling the second mixture to 25-40 ℃.
8. Use of an epoxy resin system for wet winding according to any of claims 1 to 5 in a housing or container lined with an aluminium alloy.
9. Use of an epoxy resin system for wet winding according to claim 8, wherein the aluminium alloy lined shell or vessel comprises an aluminium alloy lined compressed natural gas cylinder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114395219A (en) * | 2022-01-17 | 2022-04-26 | 南通中集能源装备有限公司 | Hydrogen storage bottle, liquid epoxy resin system wound by wet method and preparation method thereof |
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| CN109852004A (en) * | 2019-01-04 | 2019-06-07 | 恩莱登（北京）工业技术有限公司 | Epoxy resin-base composition, epoxy resin-base and preparation method thereof |
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| CN114395219A (en) * | 2022-01-17 | 2022-04-26 | 南通中集能源装备有限公司 | Hydrogen storage bottle, liquid epoxy resin system wound by wet method and preparation method thereof |
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