CN113119368A - Epoxy resin-based fiber composite material and preparation method thereof - Google Patents
Epoxy resin-based fiber composite material and preparation method thereof Download PDFInfo
- Publication number
- CN113119368A CN113119368A CN201911422844.4A CN201911422844A CN113119368A CN 113119368 A CN113119368 A CN 113119368A CN 201911422844 A CN201911422844 A CN 201911422844A CN 113119368 A CN113119368 A CN 113119368A
- Authority
- CN
- China
- Prior art keywords
- epoxy resin
- composite system
- fiber
- drying oven
- curing agent
- 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.)
- Pending
Links
Classifications
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses an epoxy resin-based fiber composite material and a preparation method thereof, wherein the preparation method comprises the following steps: s1: preheating epoxy resin and mixing the preheated epoxy resin with fiber to obtain a first composite system of the epoxy resin and the fiber; s2: adding a curing agent into the first composite system to obtain a second composite system of the curing agent, epoxy resin and fibers; s3: and pouring the second composite system into a mold, and heating and curing to obtain the epoxy resin-based fiber composite material. The preparation method provided by the invention does not use a solvent, reduces the production cost and avoids environmental pollution; the production time is short, the efficiency is high, the convenience is high, no air bubble is generated in the mixing process of the epoxy resin and the fiber, the control is easy, and the continuous production can be realized.
Description
Technical Field
The invention relates to the field of materials, in particular to an epoxy resin-based fiber composite material and a preparation method thereof.
Background
Among the thermosetting resins, the most widely used are three general-purpose thermosetting resins: epoxy resin, phenolic resin and unsaturated resin. The types of epoxy resins are the most common among these three types of resins and are most widely used. The epoxy resin is a high molecular compound with a linear structure, contains a plurality of epoxy groups, is a high molecular prepolymer taking aliphatic, alicyclic or aromatic chain segments as main chains, and contains active groups which are easy to generate cross-linking reaction with various curing agents to generate a network polymer with certain cohesive force. The epoxy resin has excellent infiltration and adhesion properties on various fibers, and a cured product has high mechanical properties and acid, alkali and various chemicals resistance, so that the epoxy resin is an important component in the composite material. The composite material prepared from the epoxy resin is widely applied to the fields of chemical corrosion prevention, electric/electronic insulating materials, cultural and sports goods, automobile industry, aerospace, aviation, military equipment and the like.
At present, the adopted method for preparing the epoxy resin-based fiber composite material is as follows: the epoxy resin is diluted by a solvent and then mixed and bonded with the fiber, and the solvent is evaporated while heating in the mixing process. This method has the following problems: firstly, volatilizing all solvents and needing longer preparation time; secondly, bubbles are easily generated in the heating and volatilizing process, and the product performance is influenced; thirdly, the solvent pollutes the environment and is not environment-friendly; fourthly, the cost of the solvent is higher. Accordingly, there is a need for an improved method of preparing epoxy resin based fiber composites.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the epoxy resin-based fiber composite material and the preparation method thereof, and the epoxy resin-based fiber composite material has the advantages of simple process, energy conservation, low pollution, easy control and suitability for large-scale production.
The technical scheme adopted by the invention for solving the technical problems is to provide a preparation method of an epoxy resin-based fiber composite material, which comprises the following steps: s1: preheating epoxy resin and mixing the preheated epoxy resin with fiber to obtain a first composite system of the epoxy resin and the fiber; s2: adding a curing agent into the first composite system to obtain a second composite system of the curing agent, epoxy resin and fibers; s3: and pouring the second composite system into a mold, and heating and curing to obtain the epoxy resin-based fiber composite material.
Preferably, in the step S1, the preheating temperature of the epoxy resin is 40 ℃ to 60 ℃.
Preferably, the step S1 includes: preheating the epoxy resin, mixing the epoxy resin with the fiber, stirring the mixture until the mixture is uniformly mixed, and then putting the mixture into a vacuum drying oven for vacuumizing to obtain a first composite system of the epoxy resin and the fiber.
Preferably, the step S2 includes: and adding the curing agent into the first composite system, stirring until the curing agent is uniformly mixed, and then putting the mixture into a vacuum drying oven for vacuumizing to obtain a second composite system of the curing agent, the epoxy resin and the fibers.
Preferably, the mass ratio of the curing agent to the epoxy resin is 1:5-1: 3.
Preferably, the step S3 includes: and pouring the second composite system into a mold heated to 60-90 ℃, putting the mold into a drying oven at 60-90 ℃, forming and curing for 20-60 min, and demolding to obtain the epoxy resin-based short fiber composite material.
Preferably, the curing agent is modified isophorone diamine, ethylene diamine, m-phenylenediamine or diethylaminopropylamine.
Preferably, in the step of putting the mixture into a vacuum drying oven for vacuumizing, the temperature of the vacuum drying oven is 30-40 ℃, and the vacuumizing time is 3-8 min.
The invention adopts another technical scheme to solve the technical problems and provides an epoxy resin-based fiber composite material prepared by the method.
Compared with the prior art, the invention has the following beneficial effects: according to the epoxy resin-based fiber composite material and the preparation method thereof provided by the invention, no solvent is added for dilution in the epoxy resin preheating process, and the epoxy resin-based fiber composite material with excellent performance is obtained by controlling the mass ratio of the curing agent to the epoxy resin and the curing temperature, so that the epoxy resin-based fiber composite material has the following advantages: no solvent is used, so that the production cost is reduced, and the environmental pollution is avoided; the solvent is not required to be heated until the solvent is completely volatilized, the production time is short, and the method is efficient and convenient; the epoxy resin and the fiber cannot generate bubbles in the mixing process, the control is easy, the continuous production can be realized, and the obtained epoxy resin-based fiber composite material has excellent performance.
Detailed Description
The present invention will be further described with reference to the following examples.
The invention provides an epoxy resin-based short fiber composite material and a preparation method thereof, which mainly comprises the following steps:
step S1: preheating the epoxy resin and mixing the preheated epoxy resin with the fiber to obtain a first composite system of the epoxy resin and the fiber. (ii) a Wherein the epoxy resin can be E-51 type epoxy resin, bisphenol A type epoxy resin E42, bisphenol A type epoxy resin E44 or bisphenol A type epoxy resin E55, and the fiber can be organic fiber. Specifically, the epoxy resin is put into a blast drying oven for preheating, and the preheating temperature can be 40-60 ℃. Because the epoxy resin is in a sticky paste shape, the epoxy resin has better fluidity after being preheated and is easier to be bonded with the fiber. Taking out the preheated epoxy resin, adding the fiber, stirring until the mixture is uniformly mixed, and then putting the mixture into a vacuum drying oven for vacuumizing, wherein the temperature of the vacuum drying oven is 30-40 ℃, and the vacuumizing time is 3-8 min.
Step S2: and adding a curing agent into the first composite system obtained in the step S1 to obtain a second composite system of the curing agent, the epoxy resin and the fibers. The curing agent can be slowly added into the first composite system according to the mass ratio of 1:5-1:3 of the curing agent to the epoxy resin, and the curing agent is added while stirring and stirred until the curing agent and the epoxy resin are uniformly mixed. And putting the mixture into a vacuum drying oven for vacuumizing again, wherein the temperature of the vacuum drying oven is 30-40 ℃, and the vacuumizing time is 3-8 min. The curing agent can be modified isophorone diamine, ethylene diamine, m-phenylenediamine or diethylaminopropylamine and the like.
Step S3: and (4) pouring the second composite system obtained in the step S2 into a mold, and heating and curing to obtain the epoxy resin-based fiber composite material. Specifically, the second composite system is poured into a mold coated with a release agent heated to 60 ℃ to 90 ℃, and the release agent is not particularly limited as long as it can resist high temperature. And finally, placing the epoxy resin matrix fiber composite material into a drying oven at the temperature of 60-90 ℃, forming and curing for 20-60 min, and demolding to obtain the epoxy resin matrix fiber composite material.
In this embodiment, epoxy resin with model number E-51 and modified isophorone diamine are taken as examples of the curing agent, and for other types of epoxy resin, those skilled in the art can select the corresponding curing agent and the mass ratio of the curing agent to the epoxy resin, the curing temperature, etc. to realize a solventless manufacturing process.
Example 1
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:3, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 35 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 2
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 8min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:4, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 30 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 3
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 3min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:5, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 40 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 4
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:4, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 35 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 60 ℃ and coated with a release agent, putting the mold into a drying oven at 60 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 5
Preheating epoxy resin in an air-blast drying oven at 50 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:4, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 35 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 6
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:4, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 35 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 80 ℃ and coated with a release agent, putting the mold into a drying oven at 80 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 7
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. Slowly adding modified isophorone diamine into the first composite system according to the mass ratio of the modified isophorone diamine to epoxy resin being 1:4, stirring while adding, stirring until the modified isophorone diamine is uniformly mixed, putting the mixture into a vacuum drying oven at 35 ℃, and vacuumizing for 5min to obtain a second composite system of a curing agent, the epoxy resin and fibers. And pouring the second composite system into a mold which is heated to 90 ℃ and coated with a release agent, putting the mold into a drying oven at 90 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 8
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. According to the mass ratio of 1: and 4, slowly adding the modified isophorone diamine into the first composite system while stirring, stirring until the modified isophorone diamine is uniformly mixed, and putting the mixture into a vacuum drying oven at 35 ℃ for vacuumizing for 5min to obtain a second composite system of the curing agent, the epoxy resin and the fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 20min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 9
Preheating the epoxy resin in an air-blast drying oven at the temperature of 60 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. According to the mass ratio of 1: and 4, slowly adding the modified isophorone diamine into the first composite system while stirring, stirring until the modified isophorone diamine is uniformly mixed, and putting the mixture into a vacuum drying oven at 35 ℃ for vacuumizing for 5min to obtain a second composite system of the curing agent, the epoxy resin and the fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 40min, and demolding to obtain the epoxy resin-based fiber composite material.
Example 10
Preheating epoxy resin in an air-blast drying oven at the temperature of 40 ℃; and taking out the preheated epoxy resin, adding the fiber, uniformly stirring, putting into a vacuum drying oven at 35 ℃ and vacuumizing for 5min to obtain a first composite system of the epoxy resin and the fiber. According to the mass ratio of 1: and 4, slowly adding the modified isophorone diamine into the first composite system while stirring, stirring until the modified isophorone diamine is uniformly mixed, and putting the mixture into a vacuum drying oven at 35 ℃ for vacuumizing for 5min to obtain a second composite system of the curing agent, the epoxy resin and the fibers. And pouring the second composite system into a mold which is heated to 70 ℃ and coated with a release agent, putting the mold into a drying oven at 70 ℃, curing and molding for 60min, and demolding to obtain the epoxy resin-based fiber composite material.
Therefore, according to the epoxy resin-based fiber composite material and the preparation method thereof provided by the invention, no solvent is added for dilution in the epoxy resin preheating process, and the epoxy resin-based fiber composite material with excellent performance is obtained by controlling the mass ratio of the curing agent to the epoxy resin and the curing temperature, so that the epoxy resin-based fiber composite material has the following advantages: no solvent is used, so that the production cost is reduced, and the environmental pollution is avoided; the solvent is not required to be heated until the solvent is completely volatilized, the production time is short, and the method is efficient and convenient; the epoxy resin and the fiber cannot generate bubbles in the mixing process, the control is easy, the continuous production can be realized, and the obtained epoxy resin-based fiber composite material has excellent performance.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The preparation method of the epoxy resin-based fiber composite material is characterized by comprising the following steps:
s1: preheating epoxy resin and mixing the preheated epoxy resin with fiber to obtain a first composite system of the epoxy resin and the fiber;
s2: adding a curing agent into the first composite system to obtain a second composite system of the curing agent, epoxy resin and fibers;
s3: and pouring the second composite system into a mold, and heating and curing to obtain the epoxy resin-based fiber composite material.
2. The method of claim 1, wherein the preheating temperature of the epoxy resin in the step S1 is 40 ℃ to 60 ℃.
3. The method of claim 1, wherein the step S1 includes:
preheating the epoxy resin, mixing the epoxy resin with the fiber, stirring the mixture until the mixture is uniformly mixed, and then putting the mixture into a vacuum drying oven for vacuumizing to obtain a first composite system of the epoxy resin and the fiber.
4. The method of claim 1, wherein the step S2 includes: and adding the curing agent into the first composite system, stirring until the curing agent is uniformly mixed, and then putting the mixture into a vacuum drying oven for vacuumizing to obtain a second composite system of the curing agent, the epoxy resin and the fibers.
5. The production method according to claim 1 or 4, wherein the mass ratio of the curing agent to the epoxy resin is 1:5 to 1: 3.
6. The method of claim 1, wherein the step S3 includes: and pouring the second composite system into a mold heated to 60-90 ℃, placing the mold into a drying oven at 60-90 ℃, forming and curing for 20-60 min, and demolding to obtain the epoxy resin-based short fiber composite material.
7. The method according to claim 1, wherein the curing agent is modified isophoronediamine, ethylenediamine, m-phenylenediamine, or diethylaminopropylamine.
8. The method according to claim 3 or 4, wherein in the step of placing into a vacuum drying oven and vacuumizing, the temperature of the vacuum drying oven is 30-40 ℃, and the vacuumizing time is 3-8 min.
9. An epoxy resin based fibre composite, characterized in that it is prepared by the method according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422844.4A CN113119368A (en) | 2019-12-31 | 2019-12-31 | Epoxy resin-based fiber composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911422844.4A CN113119368A (en) | 2019-12-31 | 2019-12-31 | Epoxy resin-based fiber composite material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113119368A true CN113119368A (en) | 2021-07-16 |
Family
ID=76770681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911422844.4A Pending CN113119368A (en) | 2019-12-31 | 2019-12-31 | Epoxy resin-based fiber composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113119368A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616802A (en) * | 2007-02-16 | 2009-12-30 | 陶氏环球技术公司 | Be used to prepare the method for the composite that comprises epoxy resin formulation |
| CN102190859A (en) * | 2010-03-19 | 2011-09-21 | 上海佳翰新材料科技有限公司 | Preparation method of epoxy resin zirconium tungstate composite material |
-
2019
- 2019-12-31 CN CN201911422844.4A patent/CN113119368A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101616802A (en) * | 2007-02-16 | 2009-12-30 | 陶氏环球技术公司 | Be used to prepare the method for the composite that comprises epoxy resin formulation |
| CN102190859A (en) * | 2010-03-19 | 2011-09-21 | 上海佳翰新材料科技有限公司 | Preparation method of epoxy resin zirconium tungstate composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109265922B (en) | High-toughness autocatalytic epoxy resin and preparation method thereof | |
| CN102702683B (en) | Epoxy resin for prepreg and preparation method thereof | |
| CN102803335A (en) | Hardener composition for epoxy resins | |
| CN101514246B (en) | Modification method of continuous PBO fiber for strengthening interface of bimaleimide resin base composite material | |
| CN111732715B (en) | Epoxy resin system used at high temperature in normal-temperature curing and preparation method thereof | |
| CN101429337B (en) | Process for producing low-dielectric loss cyanate resin | |
| CN102079874A (en) | Preparation method of cage-type silsesquioxane-containing low-dielectric cyanate hybrid resin | |
| WO2023179260A1 (en) | Natural plant fiber/water-borne epoxy resin composite material and manufacturing method therefor | |
| CN103865001A (en) | Environment-friendly modified polyurethane chemical grouting material and preparation method thereof | |
| US20040070109A1 (en) | Method for the production of a fiber-reinforced product based on epoxy resin | |
| CN110819023B (en) | Low-dielectric-loss resin-based composite material and preparation method and application thereof | |
| CN101397486A (en) | Bi-component epoxide-resin adhesive and preparation method thereof | |
| CN105086904A (en) | Preparation method of high-temperature-resistant epoxy structural adhesive | |
| CN1213084C (en) | Preparation method and application of modified double maleimide resin | |
| CN113119368A (en) | Epoxy resin-based fiber composite material and preparation method thereof | |
| CN105001825A (en) | Low temperature resisting epoxy resin adhesive and preparation method thereof | |
| CN102683849A (en) | Glass fiber reinforced plastic antenna cover and preparation method thereof | |
| CN107163478B (en) | Unsaturated resin composition capable of being cured by heat and then by light irradiation, and preparation method and application thereof | |
| CN111100505A (en) | Ternary vinyl chloride-vinyl acetate epoxy conductive ink | |
| CN105330765A (en) | Imidazole compound, preparation method and thermosetting composition containing imidazole compound | |
| CN104910347A (en) | Preparation method and application of hyperbranched biphenyls liquid crystal grafting sisal hemp microcrystal | |
| CN111662561B (en) | Preparation method of flame-retardant and repeatedly-processable wood-plastic composite material | |
| CN106751819A (en) | A kind of RTM techniques cyanate resin composition and preparation method | |
| CN112646248A (en) | Preparation method of high-temperature-resistant low-dielectric elastomer material | |
| CN105482373A (en) | Method for toughening and modifying epoxy resin through epoxy-terminated polystyrene low polymer |
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 | ||
| CB02 | Change of applicant information |
Address after: 314006 2nd floor, building 5, No.1303, Asia Pacific Road, Nanhu District, Jiaxing City, Zhejiang Province Applicant after: Zhejiang Maitong Intelligent Manufacturing Technology (Group) Co.,Ltd. Applicant after: Chuangmai Medical Technology (Shanghai) Co.,Ltd. Address before: 314006 2nd floor, building 5, No.1303, Asia Pacific Road, Nanhu District, Jiaxing City, Zhejiang Province Applicant before: MAITONG MEDICAL TECHNOLOGY (JIAXING) Co.,Ltd. Applicant before: Chuangmai Medical Technology (Shanghai) Co.,Ltd. |
|
| CB02 | Change of applicant information |