CN115626997A - Preparation method of polyurethane-based composite material - Google Patents
Preparation method of polyurethane-based composite material Download PDFInfo
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- CN115626997A CN115626997A CN202211309460.3A CN202211309460A CN115626997A CN 115626997 A CN115626997 A CN 115626997A CN 202211309460 A CN202211309460 A CN 202211309460A CN 115626997 A CN115626997 A CN 115626997A
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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
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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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
- C08J2375/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to a preparation method of a polyurethane-based composite material, belonging to the technical field of wind power blades. The invention aims to provide a preparation method of a polyurethane-based composite material. The method comprises the steps of laying a reinforcing material and demolding cloth, covering a vacuum bag, guiding a flow net, installing an injection pipe, starting vacuum pumping, raising the temperature to 51-60 ℃ for dehumidification, directly mixing two-component polyurethane resin uniformly without cooling, injecting the mixture into a mold, curing and demolding to obtain the polyurethane-based composite material. By adopting the method, the dehumidification temperature is increased in the vacuum dehumidification process, the volatilization of water in the fabric is accelerated, the dehumidification time is greatly shortened, after the dehumidification is qualified, the fabric in the mold does not need to be cooled to be below 30 ℃, the perfusion can be started, the perfusion can be directly performed, and the waiting time for cooling in the period is saved. The method of the invention saves a large amount of dehumidification time and waiting cooling time, and obviously improves the production efficiency of the polyurethane-based composite material.
Description
Technical Field
The invention relates to a preparation method of a polyurethane-based composite material, belonging to the technical field of wind power blades.
Background
The polyurethane resin serving as the sixth synthetic resin in the world has the outstanding advantages of low price, quick curing and forming, and good mechanical property and fatigue property, is particularly suitable for being compounded with fabrics such as glass fibers, carbon fibers and the like to prepare composite materials, and is important to be applied to the field of wind power blade manufacturing. However, the black material main component polymeric MDI in polyurethane is very sensitive to moisture, and can generate a large amount of bubbles when contacting with trace moisture in a compound fabric in an air environment, thereby causing quality defects of whitening/bubbling of a composite material and the like, thereby greatly limiting the application of the black material main component polymeric MDI in the field of the composite material, and being difficult to popularize and apply in a large area.
Polyurethane resins have many advantages and are useful in the manufacture of wind power blades, but have not achieved large area applications, primarily requiring moisture and water removal from the glass fibers. At present, the main methods adopted by blade manufacturers include controlling temperature and humidity of the environment, drying and dewatering glass fibers (carbon fibers) or other fabrics, laying the fabrics such as the glass fibers in a blade mold, then starting vacuum to raise the temperature (generally 45 ℃) for dehumidification, reducing the temperature (generally below 30 ℃) and filling and manufacturing after the temperature is reduced. These methods can remove moisture from the fabric to a certain extent, and overcome the disadvantages of polyurethane application, but also bring about the outstanding problems of long mold-occupying time, low efficiency, and the like in the manufacturing process, thereby causing the application to be greatly limited.
For example, the chinese patent application No. 201810666862.6 discloses a method for drying a sandwich material in a polyurethane composite material, which comprises placing a sandwich material on a supporting device, covering the sandwich material with at least one layer of film, sealing the periphery of the film and the device, and reserving at least one channel; and heating the sandwich material, and vacuumizing a closed space defined by the film and the device through the channel until the sandwich material is dried. The heating is one or two or more selected from electric blanket heating, electrothermal film heating, microwave heating, infrared heating and hot air blowing heating. Therefore, in order to remove moisture of fabrics such as glass fibers and the like, the method needs heating or infrared radiation and the like, the method needs long time and consumes more energy, and the requirement of the existing vacuum infusion process for preparing the blades cannot be met.
The Chinese patent with the application number of 201910401183.0 discloses a method for preparing a polyurethane composite material by using a vacuum infusion process, wherein a reinforcing material, a sandwich material and/or a flow guide medium are placed in a mold, and are heated and controlled at the temperature of 20-50 ℃, preferably 20-45 ℃, more preferably 30-45 ℃, and particularly preferably 33-37 ℃; evacuating and controlling the pressure at 0-30mbar, preferably 0-25mbar, more preferably 0-20mbar, for 1-6 hours, preferably 2-4 hours; and injecting a polyurethane composition, curing and demolding to obtain the polyurethane composite material. The heating is preferably carried out by setting the heating temperature to 40 to 50 ℃ and preferably 40 to 45 ℃ and then gradually reducing the temperature to 20 to 25 ℃. The dehumidifying time is very long because the dehumidifying heating temperature is low. If 50 layers of fibers are laid according to the current 85-meter blade, the dehumidification testing time is required to be 14 hours, the temperature is required to be reduced to below 30 ℃ in the pouring process, the time is required to be 10 hours, the efficiency is very low, the time for occupying a mold is very long, and the requirement for high efficiency of the blade at present cannot be met.
In summary, the existing polyurethane system needs to heat, raise temperature and dehumidify the fabric for a long time in the application process, and then cool down after heating and dehumidifying, and then start to vacuum-fill polyurethane, and raise temperature and solidify after filling. In the process, a large amount of time is consumed for heating, vacuumizing and dehumidifying, and after heating, the temperature is cooled, and the process is a very long process, so that the efficiency in the manufacturing process is greatly reduced, according to the existing process for preparing the blades by polyurethane, 50 layers of fibers (80 layers at the thickest blade root) are paved for dehumidifying for blades only as long as 85 meters, usually more than 12 hours are needed, and then the process waits for cooling to the surface temperature of below 30 ℃, and waits for more than 8 hours, so that the process is very time-consuming.
Disclosure of Invention
Aiming at the defects, the technical problem to be solved by the invention is to provide a preparation method of a polyurethane-based composite material with short mold occupying time and high efficiency.
The preparation method of the polyurethane-based composite material comprises the following steps:
laying a reinforcing material and demolding cloth, covering a vacuum bag, a flow guide net, installing an injection pipe, starting vacuum pumping, controlling the vacuum degree between minus 0.095 and minus 0.099Mpa, raising the temperature to 51-60 ℃, keeping dehumidifying for 30-90 min, directly mixing the two-component polyurethane resin uniformly without cooling, injecting the mixture into a mold, curing and demolding to obtain the polyurethane-based composite material;
wherein the two-component polyurethane resin comprises a component A and a component B,
the component A comprises: polyisocyanates, free radical initiators and inhibitors;
the component B comprises: polyols, hydroxyalkyl (meth) acrylates, unsaturated diluents, chelating agents and accelerators;
the inhibitor is at least one of phosphorus oxychloride, benzoyl chloride, sulfonyl chloride, triethyl oxyphosphorus, phosphoric acid and acetic acid; the chelating agent is at least one of EDTA, citric acid, hydroxyethyl ethylenediamine triacetic acid, polymethacrylic acid and pyrophosphoric acid; the accelerant is cobalt naphthenate and copper naphthenate.
In one embodiment of the invention, the reinforcement material comprises at least one of glass fibers, carbon fibers, basalt fibers, PET foam core, PVC foam core, balsa.
In some embodiments of the invention, the unsaturated diluent is at least one of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, isobornyl (meth) acrylate, isooctyl acrylate, t-butyl acrylate, lauryl acrylate, stearyl acrylate, cyclohexyl 2-acrylate, phenyl isobornyl acrylate, 2-methoxyethyl acrylate, carbinyl acrylate, 2-phenoxyethyltetrahydrofuran acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 1,6-hexanediol diacrylate, tetraethylene glycol diacrylate, tripropylene glycol diacrylate, bisphenol A diacrylate, trimethylolpropane triacrylate, 2-ethyl-2- (hydroxymethyl) -1,3-propylene glycol ether, pentaerythritol triacrylate, pentaerythritol tetraacrylate, trifluoroethyl acrylate, cyclotrimethylolpropane, methylal acrylate, methoxypolyethylene glycol, methacrylate, isostearyl acrylate, 2-hydroxy-3-phenylpropanol acrylate, ethoxylated polyethylene glycol 3242-based acrylate, ethoxylated bisphenol A.
In one embodiment of the invention, the inhibitor is present in a ratio of 0.001 to 0.05% by weight of the A component. In a preferred embodiment, the inhibitor is present in a ratio of 0.01% by weight of the A component.
In one embodiment of the invention, the initiators are benzoyl peroxide and tert-butyl peroxy-2-ethylhexanoate (TBPO).
In one embodiment of the invention, the benzoyl peroxide is present in an amount of 0.5 to 1% by weight of the A component and the tert-butyl peroxy-2-ethylhexanoate is present in an amount of 0.5 to 1% by weight of the A component.
In one embodiment of the invention, the polyol is 20-40% by weight of the B component, the hydroxyalkyl (meth) acrylate is 30-60% by weight of the B component, the chelating agent is 0.01-0.1% by weight of the B component, and the accelerator is 0.01-0.1% by weight of the B component.
In one embodiment of the invention, the weight ratio of cobalt naphthenate to copper naphthenate is from 3 to 8:2 to 7.
In one embodiment of the invention, the component A and the component B are mixed at the time of use in a weight ratio of 100.
In one embodiment of the invention, the component A and the component B are mixed at the time of use in a weight ratio of 100.
Compared with the prior art, the invention has the following beneficial effects:
by adopting the method, the dehumidification temperature is increased in the vacuum dehumidification process, the volatilization of water in the fabric is accelerated, the dehumidification time is greatly shortened, after the dehumidification is qualified, the fabric in the mold does not need to be cooled to be below 30 ℃, the perfusion can be started, the perfusion can be directly performed, and the waiting time for cooling in the period is saved. The method of the invention saves a large amount of dehumidification time and waiting cooling time, and obviously improves the production efficiency of the polyurethane-based composite material.
Detailed Description
The preparation method of the polyurethane-based composite material comprises the following steps:
laying a reinforcing material and demolding cloth, covering a vacuum bag, a flow guide net, installing an injection pipe, starting vacuum pumping, controlling the vacuum degree between minus 0.095 and minus 0.099Mpa, raising the temperature to 51-60 ℃, keeping dehumidifying for 30-90 min, directly mixing two-component polyurethane resin without cooling, pouring the mixture into a mold, curing and demolding to obtain the polyurethane-based composite material;
wherein the two-component polyurethane resin comprises a component A and a component B,
the component A comprises: polyisocyanates, free radical initiators and inhibitors;
the component B comprises: polyols, hydroxyalkyl (meth) acrylates, unsaturated diluents, chelating agents and accelerators;
the inhibitor is at least one of phosphorus oxychloride, benzoyl chloride, sulfonyl chloride, triethyl oxyphosphorus, phosphoric acid and acetic acid; the chelating agent is at least one of EDTA, citric acid, hydroxyethyl ethylenediamine triacetic acid, polymethacrylic acid and pyrophosphoric acid; the accelerant is cobalt naphthenate and copper naphthenate.
The invention mainly adopts a polyurethane system with specific components, after glass fibers are laid, demolding cloth is laid once, a vacuum bag is covered, a flow guide net is arranged, an injection pipe is installed, vacuum air suction is started, the temperature is raised to 51-60 ℃, under the condition of ensuring enough vacuum degree, when the temperature is raised to 51-60 ℃, the boiling point of water is extremely low, the water can quickly overflow from thick glass fibers, the water removal efficiency is greatly improved, and the time is saved. After the water removal, because the invention selects the specific component polyurethane system, the invention has the advantages of long gel time, high temperature tolerance and the like, the waiting for temperature reduction is not needed, after the two components of polyurethane are mixed and defoamed, the glue discharging temperature of the glue is controlled to be between 15 and 20 ℃, the glue injection pipe is opened to be rapidly injected into the glass fiber fabric, after the injection is finished, the glue injection pipe is closed, and the temperature is continuously raised and cured. And after the curing is finished, tearing off the surface layer vacuum bag demolding cloth and the like to obtain a polyurethane-based composite material finished product.
Compared with the traditional preparation method, the method of the invention improves the dehumidification temperature in the vacuum dehumidification process, accelerates the volatilization of moisture in the fabric, greatly shortens the dehumidification time, can directly pour the fabric without waiting for the temperature of the fabric in the mold to be reduced to below 30 ℃ after the dehumidification is qualified, saves the waiting time for temperature reduction during the period, and effectively improves the production efficiency of manufacturing the blade by using polyurethane.
Reinforcing materials commonly used in the art are suitable for use in the present invention. In one embodiment of the invention, the reinforcement material comprises glass fibers, carbon fibers, basalt fibers, PET foam core, PVC foam core, or balsa wood.
The unsaturated diluent of the present invention is a monomer having an ethylenic bond capable of undergoing a radical copolymerization reaction with hydroxyalkyl (meth) acrylate, including but not limited to at least one of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, isobornyl (meth) acrylate, isooctyl acrylate, t-butyl acrylate, lauryl acrylate, stearyl acrylate, cyclohexyl 2-acrylate, phenyl isobornyl acrylate, 2-methoxyethyl acrylate, carbinyl acrylate, 2-phenoxyethyl tetrahydrofuran acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 1,6-hexanediol diacrylate, tetraethylene glycol diacrylate, tripropylene glycol diacrylate, bisphenol a diacrylate, trimethylolpropane triacrylate, 2-ethyl-2- (hydroxymethyl) -1,3-propylene glycol ether, pentaerythritol triacrylate, pentaerythritol tetraacrylate, trifluoroethyl acrylate, cyclopropane, glycerol formal acrylate, methoxypolyethylene glycol, methacrylate, 2-hydroxy-2-ethoxy-phenyl acrylate, bisphenol a-ethoxyphenyl acrylate, bisphenol a-acrylate.
The polyisocyanate of the present invention is an isocyanate having at least two isocyanate groups, including but not limited to Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), hexamethylene Diisocyanate (HDI), lysine Diisocyanate (LDI), 1,5-Naphthalene Diisocyanate (NDI), p-phenylene diisocyanate (PPDI), p-phenylene dimethylene diisocyanate (XDI), and the like, and polymers of these isocyanates or combinations thereof.
The polyisocyanate may be commercially available under various brands including, but not limited to, wanhua PM200, hounsfield 5500, kocission 44V20L, and the like.
The amount of inhibitor is that which is conventional in the art. In one embodiment of the invention, the inhibitor is present in a ratio of 0.001 to 0.05% by weight of the A component. In a preferred embodiment, the inhibitor is present at a level of 0.01% by weight of the A component.
The free radical initiator may initiate a free radical polymerization reaction. In one embodiment of the invention, the initiators are benzoyl peroxide and tert-butyl peroxy-2-ethylhexanoate (TBPO).
In one embodiment of the invention, the benzoyl peroxide is present in an amount of 0.5 to 1% by weight of the A component and the tert-butyl peroxy-2-ethylhexanoate is present in an amount of 0.5 to 1% by weight of the A component.
The polyol may be one commonly used in the art, including but not limited to polyether polyol, polyester polyol, and the like. In one embodiment of the invention, the polyol is a polyether polyol. The amount of polyol is conventional in the art and in one embodiment of the invention is 20 to 40% by weight of the B component.
The "(meth) acrylic acid … …" in the present invention refers to … … acrylic acid or … … methacrylic acid, for example, hydroxyalkyl (meth) acrylate is hydroxyalkyl acrylate or hydroxyalkyl methacrylate, methyl (meth) acrylate is methyl acrylate or methyl methacrylate, and ethyl (meth) acrylate is ethyl acrylate or ethyl methacrylate.
The hydroxyalkyl (meth) acrylate described in the present invention is a hydroxyalkyl (meth) acrylate including, but not limited to, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and the like.
In one embodiment of the invention, the hydroxyalkyl (meth) acrylate is present in a ratio of 30 to 60% by weight of the B component.
In one embodiment of the invention, the chelating agent is present in an amount of 0.01 to 0.1% by weight of the B component and the accelerator is present in an amount of 0.01 to 0.1% by weight of the B component.
In one embodiment of the invention, the weight ratio of cobalt naphthenate to copper naphthenate is from 3 to 8:2 to 7.
In one embodiment of the invention, the component A and the component B are mixed at the time of use according to a weight ratio of 100.
In one embodiment of the invention, the component A and the component B are mixed according to the weight ratio of 100.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention. The formulation of the two-component polyurethane resin used in the examples is shown in Table 1.
TABLE 1
Example 1
Preparation of polyurethane-based composite material # 1:
after glass fibers are laid, one-time laying of demolding cloth, covering of a vacuum bag, flow guiding net, installation of an injection pipe, opening of vacuum pumping, control of vacuum degree to be 0.095MPa, raising of temperature to 55 ℃, maintenance of dehumidification for 60min, no cooling, direct filling of polyurethane, and the concrete filling steps are as follows:
the double-component polyurethane resin No. 1 is mixed and defoamed according to the weight ratio of the black material to the white material of 100 parts and the black material of 85 parts, the glue discharging temperature of the glue is controlled to be 15-20 ℃, and a glue injection pipe is opened to rapidly inject the glue into the dehumidified glass fiber fabric.
After the pouring is finished and the glue is soaked, the glue injection pipe is closed, and the temperature is continuously raised for solidification. And after the curing is finished, tearing off the surface layer vacuum bag demolding cloth and the like to obtain the polyurethane-based composite material No. 1.
The resulting polyurethane-based composite material was examined and found to have no surface defects, and the physical properties are shown in Table 2.
Example 2
Preparation of polyurethane-based composite 2 #:
after glass fibers are laid, one-time laying of demolding cloth, covering of a vacuum bag, flow guiding net, installation of an injection pipe, opening of vacuum pumping, control of vacuum degree to be 0.099MPa, raising of temperature to 60 ℃, maintaining of dehumidification for 30min, no cooling, direct filling of polyurethane, and the concrete filling steps are as follows:
mixing and defoaming the two-component polyurethane resin 2# according to the weight ratio of the black material to the white material of 100 parts and the black material of 85 parts, controlling the glue discharging temperature of the glue to be 15-20 ℃, opening a glue injection pipe, and quickly injecting the glue into the dehumidified glass fiber fabric.
After the pouring is finished and the glue is soaked, the glue injection pipe is closed, and the temperature is continuously raised for solidification. And after the curing is finished, tearing off the surface layer vacuum bag demolding cloth and the like to obtain the polyurethane-based composite material No. 2.
The resulting polyurethane-based composite material was examined and found to have no surface defects, and the physical properties are shown in Table 2.
Comparative example 1
Preparation of polyurethane-based composite material # 3:
after glass fibers are laid, one-time laying of demolding cloth, covering of a vacuum bag, flow guiding net, installation of an injection pipe, opening of vacuum pumping, control of vacuum degree to be 0.095MPa, raising of temperature to 55 ℃, maintaining of dehumidification for 60min, no cooling, and filling of polyurethane, wherein the concrete filling steps are as follows:
mixing and defoaming the double-component polyurethane resin No. 3 according to the weight ratio of the black material to the white material of 100 parts and the black material of 85 parts, controlling the glue discharging temperature of the glue to be 15-20 ℃, opening a glue injection pipe, and quickly injecting the glue into the dehumidified glass fiber fabric.
After the pouring is finished and the glue is soaked, the glue injection pipe is closed, and the temperature is continuously raised and cured. And after the curing is finished, tearing off the surface layer vacuum bag demolding cloth and the like to obtain the polyurethane-based composite material No. 3.
The obtained polyurethane-based composite material is inspected, and the appearance defects of inclusion of semi-dry yarns and the like are found in the condition that the upper surface is normal and has no bubbles, the lower surface is not completely soaked, and various physical properties are shown in a table 2.
The glass adopted in the above examples and comparative examples is Tashan glass fiber GH2-UD1250, the yarn type is S1, and the FRP sample preparation method refers to ISO527-5:2009.
TABLE 2
Therefore, the conventional polyurethane blade needs to be heated, dehumidified and cooled again, because the conventional resin system has short gelling time and is sensitive to temperature, and resin cannot be filled into the blade if the resin is directly filled without cooling. By adopting the resin and the method, after dehumidification is qualified, the filling can be started without waiting for the temperature of the fabric in the mold to be reduced to below 30 ℃, the filling can be directly performed, the waiting time for cooling during the period is saved, and the production efficiency of manufacturing the blade by using polyurethane is effectively improved.
Claims (8)
1. The preparation method of the polyurethane-based composite material is characterized by comprising the following steps: the method comprises the following steps:
laying a reinforcing material and demolding cloth, covering a vacuum bag, a flow guide net, installing an injection pipe, starting vacuum pumping, controlling the vacuum degree between minus 0.095 and minus 0.099Mpa, raising the temperature to 51-60 ℃, keeping dehumidifying for 30-90 min, directly mixing the two-component polyurethane resin uniformly without cooling, injecting the mixture into a mold, curing and demolding to obtain the polyurethane-based composite material;
wherein the two-component polyurethane resin comprises a component A and a component B,
the component A comprises: polyisocyanates, free radical initiators and inhibitors;
the component B comprises: polyols, hydroxyalkyl (meth) acrylates, unsaturated diluents, chelating agents and accelerators;
the inhibitor is at least one of phosphorus oxychloride, benzoyl chloride, sulfonyl chloride, triethyl oxyphosphorus, phosphoric acid and acetic acid; the chelating agent is at least one of EDTA, citric acid, hydroxyethyl ethylenediamine triacetic acid, polymethacrylic acid and pyrophosphoric acid; the accelerant is cobalt naphthenate and copper naphthenate.
2. The method for preparing a polyurethane-based composite material according to claim 1, wherein: the reinforcing material comprises at least one of glass fiber, carbon fiber, basalt fiber, PET foam core material, PVC foam core material and balsa wood.
3. The method for preparing a polyurethane-based composite material according to claim 1, wherein: the unsaturated diluent is at least one of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, isobornyl (meth) acrylate, isooctyl acrylate, t-butyl acrylate, lauryl acrylate, stearyl acrylate, cyclohexyl 2-acrylate, phenyl isobornyl acrylate, 2-methoxyethyl acrylate, carbinyl acrylate, 2-phenoxyethyl tetrahydrofuran acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 1,6-hexanediol diacrylate, tetraethylene glycol diacrylate, tripropylene glycol diacrylate, bisphenol A diacrylate, trimethylolpropane triacrylate, 2-ethyl-2- (hydroxymethyl) -1,3-propylene glycol ether, pentaerythritol triacrylate, pentaerythritol tetraacrylate, trifluoroethyl acrylate, cyclotrimethylolpropane, methylal acrylate, methoxypolyethylene glycol, methacrylate, isostearyl acrylate, 2-hydroxy-3-phenyloxy-propanol acrylate, ethoxylated polyethylene glycol phthalate acrylate, ethoxylated bisphenol A diacrylate.
4. The method for preparing a polyurethane-based composite material according to claim 1, wherein: the inhibitor accounts for 0.001 to 0.05 percent of the weight of the component A; preferably, the inhibitor is present in a ratio of 0.01% by weight of the A component.
5. The method for preparing a polyurethane-based composite material according to claim 1, wherein: the initiator is benzoyl peroxide and tert-butyl peroxy-2-ethyl hexanoate; preferably, the content of benzoyl peroxide is 0.5-1% of the weight of the component A, and the content of the tert-butyl peroxy-2-ethyl hexanoate is 0.5-1% of the weight of the component A.
6. The method for preparing a polyurethane-based composite material according to claim 1, wherein: the weight ratio of the polyhydric alcohol to the B component is 20-40%, the weight ratio of the hydroxyalkyl (meth) acrylate to the B component is 30-60%, the weight ratio of the chelating agent to the B component is 0.01-0.1%, and the weight ratio of the accelerator to the B component is 0.01-0.1%.
7. The method for preparing a polyurethane-based composite material according to claim 1, wherein: the weight ratio of the cobalt naphthenate to the copper naphthenate is 3-8:2-7.
8. The method for preparing a polyurethane-based composite material according to claim 1, wherein: when in use, the component A and the component B are mixed according to the weight ratio of 100; when the component A and the component B are preferably used, the component A and the component B are mixed according to the weight ratio of 100.
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| CN114654764A (en) * | 2020-12-24 | 2022-06-24 | 江苏金风科技有限公司 | Blade forming method and blade |
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| CN114654764A (en) * | 2020-12-24 | 2022-06-24 | 江苏金风科技有限公司 | Blade forming method and blade |
| CN114230758A (en) * | 2021-12-21 | 2022-03-25 | 四川东树新材料有限公司 | Polyurethane composition for wind power blade |
| CN114454516A (en) * | 2022-01-12 | 2022-05-10 | 惠柏新材料科技（上海）股份有限公司 | Simple method for preparing polyurethane composite glass fiber reinforced plastic by vacuum infusion process |
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