CN114773955B - Water-based epoxy resin coating and preparation method thereof - Google Patents

Water-based epoxy resin coating and preparation method thereof Download PDF

Info

Publication number
CN114773955B
CN114773955B CN202210535276.4A CN202210535276A CN114773955B CN 114773955 B CN114773955 B CN 114773955B CN 202210535276 A CN202210535276 A CN 202210535276A CN 114773955 B CN114773955 B CN 114773955B
Authority
CN
China
Prior art keywords
component
use according
silane coupling
epoxy resin
coupling 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.)
Active
Application number
CN202210535276.4A
Other languages
Chinese (zh)
Other versions
CN114773955A (en
Inventor
张建森
汪怀远
王瑞涛
张小宸
郭金砚
李海彬
杨玉娟
徐傲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Research Institute Of Tianjin University
Newmat Beijing Environmental Materials Technology Corp
Original Assignee
Zhejiang Research Institute Of Tianjin University
Newmat Beijing Environmental Materials Technology Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Research Institute Of Tianjin University, Newmat Beijing Environmental Materials Technology Corp filed Critical Zhejiang Research Institute Of Tianjin University
Priority to CN202210535276.4A priority Critical patent/CN114773955B/en
Publication of CN114773955A publication Critical patent/CN114773955A/en
Application granted granted Critical
Publication of CN114773955B publication Critical patent/CN114773955B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2272—Ferric oxide (Fe2O3)
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates
    • 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
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to a water-based epoxy resin coating, which comprises the following components: a) A main agent comprising an aqueous epoxy resin emulsion, said main agent further comprising silane coupling agent modified wood fibers; b) A curing agent, wherein the amount of component B) is 5.0 to 25.0 wt%, preferably 7.5 to 20.0 wt%, more preferably 10.0 to 15.0 wt%, based on the weight of component a); also relates to a method for preparing the water-based epoxy resin coating containing the silane coupling agent modification. The aqueous epoxy resin coating can avoid the emission of organic solvents and has improved adhesive force to carbon fiber composite materials.

Description

Water-based epoxy resin coating and preparation method thereof
Technical Field
The invention relates to a coating, in particular to a two-component epoxy coating, and especially relates to an epoxy resin coating containing silane modified wood fibers and a preparation method thereof.
Background
Carbon fiber is a special fiber composed of carbon element, which is used as a reinforcing material to be compounded with resin, metal, ceramic, carbon and the like for manufacturing advanced composite materials, and the composite materials are widely applied to automobile parts. To further enhance the performance of these carbon fiber composites, the carbon fiber composites need to be further coated.
In the prior art, the paint used for the carbon fiber composite material is a solvent type paint, and the paint has good adhesive force on the carbon fiber composite material, but the paint generally contains organic solvents, and the organic solvents can generate harmful gases in the coating process and pollute the environment after being discharged.
CN111117403a describes a colored filler primer for carbon fiber composites containing 5-10 parts xylene, 5-10 parts butyl acetate, which Volatile Organic Compounds (VOCs) volatilize to the atmosphere during the coating process and cause environmental pollution.
CN107129731a describes a colored nano single-coated UV coating for carbon fiber and plastic surfaces, wherein the single-coated UV coating needs to be irradiated and cured by a special ultraviolet emitting device in the drying process, so that the application is limited.
Disclosure of Invention
In order to solve the problem that the carbon fiber coating in the prior art pollutes the environment, the invention provides a water-based epoxy resin coating, and in addition, in order to enable the coating to have improved adhesive force to a carbon fiber composite material, the invention particularly provides an epoxy resin coating containing silane coupling agent modified wood fibers.
The object of the invention is achieved by providing an epoxy resin coating containing silane coupling agent modified wood fibers, the coating comprising the following components:
a) A main agent comprising an aqueous epoxy resin emulsion, said main agent further comprising silane coupling agent modified wood fibers;
b) A curing agent, which is used for curing the resin,
wherein the amount of component B) is from 5.0 to 25.0 wt%, preferably from 7.5 to 20.0 wt%, more preferably from 10.0 to 15.0 wt%, based on the weight of component a).
Optionally, wherein the component a) further comprises water, pigments and fillers and other additives than pigments and fillers.
In another aspect, the present invention also provides a method for preparing the epoxy resin coating, comprising the steps of:
i) Preparing a main agent, comprising:
a) Reacting a silane coupling agent with wood fibers; obtaining wood fiber modified by a silane coupling agent;
b) Mixing the silane coupling agent modified wood fiber with the aqueous epoxy emulsion to obtain a main agent;
ii) providing a curing agent;
wherein the amount of the curing agent is 5.0 to 25.0 wt%, preferably 7.5 to 20.0 wt%, more preferably 10.0 to 15.0 wt%, based on the weight of the main agent.
The water-based epoxy coating can avoid the problem of organic solvent emission, and simultaneously, the coating has improved adhesive force to the carbon fiber composite material.
Detailed Description
In the present invention, unless otherwise indicated, all operations are carried out at room temperature and pressure.
In one aspect, the present invention provides an epoxy resin coating comprising silane coupling agent modified wood fibers, comprising the following components:
a) A main agent comprising an aqueous epoxy resin emulsion, said main agent further comprising silane coupling agent modified wood fibers;
b) A curing agent, which is used for curing the resin,
wherein the amount of component B) is from 5.0 to 25.0 wt%, preferably from 7.5 to 20.0 wt%, more preferably from 10.0 to 15.0 wt%, based on the weight of component a).
In the present invention, the aqueous epoxy resin is any water-dispersible epoxy resin that can be dispersed in water or emulsified in water. The aqueous epoxy resin may be a self-emulsifying epoxy resin, or an emulsion or dispersion of one or more epoxy compounds with a surfactant (e.g., nonionic or ionic surfactant) for emulsifying the epoxy compounds. The self-emulsifying epoxy resin may be mixed with water to form an aqueous dispersion. The self-emulsifying epoxy resin may be an adduct of an epoxy compound with a hydrophilic monomer or polymer containing at least one group selected from the group consisting of carboxyl, hydroxyl, sulfonic acid, oxirane, and amino groups, and in the present invention, examples of the aqueous epoxy resin are glycidyl ether type epoxy resins including, but not limited to, diglycidyl ether of bisphenol a, diglycidyl ether of bisphenol F, diglycidyl ether of 1, 4-butanediol diglycidyl ether, diglycidyl ether of 1, 6-hexanediol and glycidyl ether terephthalic acid, diglycidyl ether of 1, 4-cyclohexanedimethanol diglycidyl ether, 1, 3-cyclohexanedimethanol diglycidyl ether, diglycidyl ether of hexahydroterephthalic acid; and phenolic novolac resins and mixtures of two or three thereof. Examples of commercially available waterborne epoxy resins are OUDRASPERSE WB-6001, OUDRASPERSE WB 3001, OUDRASPERSE WB4001, available from Olin Corporation.
In one embodiment of the invention, the number average molecular weight of the epoxy resin ranges from 420-1,700 (e.g. 454 to 1,666), preferably 850 to 1,000, as determined according to GB/T21863-2008 (the molecular weight of other polymeric substances is also determined using this standard); its epoxide equivalent weight is 227 to 833, preferably 475 to 500, as determined according to the method GB/T4612-2008; the solids content of the aqueous epoxy resin emulsion was 47%.
In the present invention, the silane coupling agent has the structure of the following general formula (I)
YSiX 3 (I)
Wherein, the liquid crystal display device comprises a liquid crystal display device,
y is a non-hydrolyzable group including C 2-6 Alkenyl, substituted or unsubstituted C 1-6 Alkyl or C 1-6 An alkoxy group; and
x is a hydrolyzable group including halogen, C 1-6 Alkoxy and acetoxy.
Preferably Y is C terminated by halogen, amino, mercapto, containing at least one heteroatom selected from N, O or S 3-6 Heterocyclic, (meth) acryloyloxy, isocyanate group-substituted C 1-6 Alkyl or C 1-6 An alkoxy group.
More preferably Y is an isocyanate-substituted C 1-6 Alkyl, particularly more preferably Y is C, substituted with isocyanate groups 1 -C 3 An alkyl group.
More preferably, X is methoxy or ethoxy.
In a preferred embodiment of the invention, the silane coupling agent is selected from the group consisting of 3-aminopropyl triethoxysilane (KH 550), 3- (2, 3-glycidoxy) propyl trimethoxysilane (KH 560), gamma- (methacryloxy) propyl trimethoxysilane (KH 570) and vinyl trimethoxysilane (KH 171), isocyanatoethylene triethoxysilane, preferably isocyanatoethylene triethoxysilane. An example of a commercially available silane coupling agent is A-Link 25, available from Michaelis corporation, USA.
In a preferred embodiment of the invention, the wood fibres may BE selected from palm fibres, paper fibres, straw fibres, homogeneous polymers of molecular structure formed by linear linkage of D-glucose residues via beta-1, 4 glycosidic bonds, the wood fibres commercially available in the present invention being the water-insoluble wood fibres ARBOCEL-BE600/30PU (length 40 μm) from JRS, germany.
In the present invention, the silane coupling agent modified wood fiber has the following molecular structure: a part of hydroxyl groups on the surface of the wood fiber react with a silane coupling agent to introduce silane on the wood fiber, so that the wood fiber linear polymer is formed.
In a preferred embodiment of the invention, in the A) component of the epoxy resin coating of the invention, the weight ratio of the silane coupling agent to wood fibers is from 0.01 to 0.2:1, preferably from 0.05 to 0.15:1, more preferably from 0.08 to 0.12:1.
In one embodiment of the invention, in the epoxy resin coating of the invention, wherein in component a) the weight ratio of the silane coupling agent modified wood fibers to the epoxy resin emulsion is from 0.005 to 0.15:1, preferably from 0.009 to 0.09:1, more preferably from 0.036 to 0.086:1, most preferably from 0.036 to 0.058:1.
In one embodiment of the invention, wherein in the epoxy resin coating of the invention, wherein in component a) the silane coupling agent modified wood fibers comprise 0.1 to 4.0 wt. -%, preferably 0.2 to 3.5 wt. -%, more preferably 0.5 to 3.0 wt. -%, still more preferably 1.8 to 2.2 wt. -% of the component a).
In one embodiment of the invention, wherein in the epoxy resin coating of the invention, wherein in the components A) and B) the silane coupling agent modified wood fibers comprise 0.35 to 3.5 wt.%, preferably 0.40 to 3.0 wt.% of the sum of the components A) and B).
In a preferred embodiment of the invention, component A), i.e. the main agent of the epoxy resin coating, comprises the following components, based on the total weight of the main agent:
the sum of the components is 100% by weight.
Wherein the pigment filler comprises a pigment selected from the group consisting of iron oxide red, titanium white, iron oxide yellow, and an inorganic filler, the pigment being used in an amount of 5.0 to 15.0 wt% based on the total weight of the main agent; the inorganic filler is selected from precipitated barium sulfate, talcum powder, kaolin, titanium white, calcium carbonate, zinc phosphate, mica and mixtures thereof, and is used in an amount of 5.0 to 30.0 wt% based on the total weight of the main agent.
Wherein the other additives than pigment and filler are selected from defoamers, wetting agents, dispersants and rheology assistants.
"defoamer" herein refers to a chemical additive that reduces and hinders foam formation. The defoamer may be a silicone-based defoamer, a mineral oil-based defoamer, an ethylene oxide/propylene oxide-based defoamer, a polyalkylacrylate, or a mixture thereof. Suitable commercially available defoamers include, for example, tego Airex 902W and Tego stramex 1488 polyether siloxane copolymer emulsions, both available from Tego; BYK-024 silicone defoamer is available from BYK, or mixtures thereof. The defoamer is used in an amount of 0.2 to 0.5 wt% based on the total weight of the main agent.
"wetting agent" as used herein refers to a chemical additive that reduces the surface tension of a coating composition, making the coating composition more susceptible to diffusion or penetration on the substrate surface. Suitable wetting agent surfactants include low molecular weight siloxane-type surfactants (e.g., end group polyether modified low molecular weight polysiloxanes), fluorocarbon-type surfactants, and combinations of one or more of acetylenic diols, in amounts of 0.2 to 0.3 weight percent, based on the total weight of the host.
Suitable dispersants include one or more of anionic (e.g., sodium oleate, carboxylates, sulfonates, etc.), cationic (e.g., octadecylamine acetate, alkyl quaternary ammonium salts, aminopropylenedioleate, quaternary ammonium salts, polyaminoamide phosphates), nonionic (e.g., adducts of fatty acid ethylene oxide, polyethylene glycol polyols, polyvinylamine derivatives), electrically neutral (e.g., oil amino oleate), polymeric (e.g., poly (internal polyol) -polyethyleneimine block copolymers), reactants of polycaprolactone and triethylenetetramine, acrylate polymers, polyacrylates), the dispersants being used in amounts of 1.0 to 1.5% by weight based on the total weight of the host.
Suitable rheology aids include bentonite, attapulgite, and aluminum silicate; cellulose, such as methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose; polyacrylates such as polyacrylates, homopolymers of acrylic acid and methacrylic acid and the like; polyurethane rheology aids suitable commercially available rheology aids are for example Rheovis PU 1190 available from BASF, germany. The rheological aid is used in an amount of 0.3 to 0.5% by weight, based on the total weight of the main agent.
The coating of the present invention also includes a component B) curing agent to cure the coating composition. Curing agents known to be suitable for curing epoxy resins may be employed, including amine-based curing agents, anhydride-based curing agents, synthetic resin-based curing agents (e.g., phenolic resins, polyamide resins, amino resins formed by the reaction of urea and melamine with an aldehyde). Among them, amine curing agents are preferable, for example:
aliphatic amines, such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, 2, 4-trimethylhexamethylenediamine, 2, 4-trimethylhexamethylenediamine, 1, 6-hexamethylenediamine, 1-ethyl-1, 3-propylenediamine, bis (3-aminopropyl) piperazine, N-aminoethylpiperazine, N-bis (3-aminopropyl) ethylenediamine;
-alicyclic amines such as 1, 2-diaminocyclohexane, 1, 4-diamino-3, 6-diethylcyclohexane, 1, 2-diamino-4-ethylcyclohexane, 1, 4-diamino-3, 6-diethylcyclohexane, 1-cyclohexyl-3, 4-diaminocyclohexane, isophorone-diamine, norbornadiene, 4 '-diaminodicyclohexylmethane, 4' -diaminodicyclohexylpropane, 2-bis (4-aminocyclohexyl) propane, 3 '-dimethyl-4, 4' -diaminodicyclohexylmethane, 3-amino-1-cyclohexane-aminopropane, 1, 3-and 1, 4-bis (aminomethyl) cyclohexane;
aromatic amines such as 2, 4-toluenediamine, 2, 6-toluenediamine, m-xylylenediamine and p-xylylenediamine;
polyetheramines such as polyoxypropylene diamine;
polyamidoamine.
Commercially available curing agents may be used, including EPI-CURE8535, 8536, 8537, 8290 and 8292 curing agents available from Hexion; anquamine 401 and Epilink381 curing agents available from AirProducts; beckopoox EH659W, EH623W and VEH2133W curing agents available from Allnex; EPOTUF 37-680 and 37-681 curatives available from Reichhold, OUDRAGURE WB 8001 curatives available from Olin Corporation.
Component B) is used in an amount of 5.0 to 25.0% by weight, preferably 7.5 to 20.0% by weight, more preferably 10.0 to 15.0% by weight, based on the weight of component A).
The epoxy resin coating of the invention is divided into A) a main agent and B) a curing agent, and before actual use, the main agent and the curing agent are respectively accommodated in different containers; in use, the two components are mixed and applied to the desired location or material.
In yet another aspect of the present invention, there is provided a method of preparing the above epoxy resin coating, comprising the steps of:
i) Preparing a main agent, comprising:
a) Reacting a silane coupling agent with wood fibers; obtaining silane coupling agent modified wood fiber;
b) Mixing the silane coupling agent modified wood fiber with the aqueous epoxy resin emulsion to obtain a main agent;
ii) providing a curing agent;
wherein the amount of component B) is from 5.0 to 25.0 wt%, preferably from 7.5 to 20.0 wt%, more preferably from 10.0 to 15.0 wt%, based on the weight of component a).
In the method of producing the above epoxy resin coating material of the present invention, the foregoing description of the respective components of the coating material applies equally, and the description is not necessarily repeated here.
In step a), preferably, the solvent used to dissolve the silane coupling agent is an ester solvent, a ketone solvent, including ethyl acetate, butyl acetate, acetone, butanone, preferably ethyl acetate. Wherein, the silane coupling agent is dissolved in ethyl acetate for example, and then the wood fiber is soaked in the solution of the silane coupling agent, so that the wood fiber modified by the silane coupling agent can be obtained. Preferably, the solvent is removed, for example by evaporation (in particular vacuum evaporation).
The aqueous epoxy resin emulsion is preferably formed by dissolving the epoxy resin in water, and optionally using an emulsifier.
The silane coupling agent modified wood fibers are mixed with the aqueous epoxy resin emulsion to obtain a main agent, which preferably does not include an organic solvent.
In the step of providing the curing agent, it may be synthesized using a known method, or a commercially available curing agent, preferably an amine-based curing agent, may be used, as described above.
The epoxy resin coating obtained in step i) and the curing agent obtained in step ii) of the method are respectively contained in different containers before actual use; in use, the two components are mixed and applied to the desired location or material.
The invention also provides the application of the epoxy resin coating and the epoxy resin coating prepared by the method in carbon fiber composite materials, in particular to the preparation of automobile coatings and anti-corrosion coatings.
It should be noted that, within the present specification, the respective features, parameters, conditions and combinations thereof described for the aqueous epoxy resin coating product are applicable to the preparation method and use thereof.
The invention is further described by the following examples, but the invention is not limited thereto.
Examples
The raw materials used are:
the test method used was:
number average molecular weight: according to GB/T21863-2008 determination
Fineness: according to GB 1724-1979
Adhesion force: according to GB/T5210-2006
Example 1
Step 1: preparation of silane coupling agent modified wood fibers
1.0g of silane coupling agent A-Link 25 was dissolved in 9.0g of ethyl acetate solvent, i.e., mixed in a weight ratio of 1:9, to prepare 10% ethyl acetate solution (10.0 g) of silane coupling agent A-Link 25.
10.0g of wood fiber ARBOCEL-BE600/30PU is soaked in the prepared silane coupling agent solution (10.0 g) according to the mass ratio of 1:1, and the mixture is kept stand for more than 24 hours in a closed environment at 25 ℃ to enable isocyanate groups to fully react with hydroxyl groups, and ethyl acetate is distilled at 80 ℃ to remove solvent (the ethyl acetate solvent recovered by condensation can BE collected and recycled), so that 11.0g of the chemically modified wood fiber of the silane coupling agent can BE obtained.
Step 2: preparation of the Main agent
a) 17.5g of water were added to the flask and stirring was started at 500r/min, then 0.3g of defoamer (FoamStar SI 2293 from BASF, germany), 0.2g of wetting agent (Hydroplaat WE 3322 from BASF, germany), 1.1g of dispersant (Dispex Ultra PA 4550 from BYK, germany), 0.5g of silane modified wood fiber (homemade, as before), 10.0g of iron oxide red (BAYFERROX 4100 from Langshen, germany), 25.0g of precipitated barium sulfate (from Shanxi wind) were added and stirred for 5min;
b) Increasing the rotational speed to 800r/min, adding 45.0g of aqueous epoxy resin (OUDRASERSE WB 6001 available from Olin U.S.A.), then dispersing at high speed for 20min at 2000r/min, and grinding to fineness less than or equal to 30 μm;
c) The rotational speed was adjusted to 800r/min, 0.4g of a rheology aid (Rheovis PU 1190 from BASF, germany) was added, stirred for 20min and filtered. After 24h of standing, the mixture is used for preparing paint.
Step 3: providing a curing agent
The rotation speed was adjusted to 800r/min, and 2.5g of water and 10.0g of amine hardener resin (OUDRAGCure WB 8001 from Olin U.S.A.) were added to the flask and dispersed for 3min.
Step 4: mixing main agent and curing agent
And (3) preparing the main agent and the curing agent into paint according to the mass ratio of 8:1, mechanically stirring for 2min, adding deionized water to dilute until the solid content is 10-15 wt%, and adopting air spraying to prepare the coating.
Examples 2 to 6
The preparation was similar to example 1, except that different amounts of silane coupling agent modified wood fibers from example 1 were used in examples 2 to 6, the amounts of silane coupling agent modified wood fibers used in examples 2 to 6 are shown in Table 1, and the total amount of the reagents was balanced with deionized water so that the total amount of the main agent was 100g.
Comparative example 1
The preparation was similar to example 1, except that in comparative example 1, the silane coupling agent-modified wood fiber was not added, and the total amount of the main agent was equilibrated with deionized water so that the total amount of the main agent was 100g.
Testing
The water-based epoxy paint is prepared by adopting the scheme, the water-based epoxy paint is sprayed on a carbon fiber composite material substrate, after 7 days of maintenance, the adhesive force of the coating on the carbon fiber composite material is tested by adopting a pull-away method of the model of Posi Test AT-A of DeFelsko company in U.S. according to the specification of the standard Test method for testing the pull-away strength of the coating by using a portable adhesive force tester of ASTM D4541-17, and the specific Test method is as follows: using a portable adhesive force tester, and using epoxy resin type AB structural adhesive of force group limited company to bond a cylindrical aluminum ingot with the size of 20mm on the surface of the coating; after the structural adhesive is solidified, applying tensile stress to the aluminum ingot along the vertical direction of the plane of the substrate by using an adhesive force tester until the coating is destroyed; the experimental results are expressed in terms of tensile forces that damage the coating to the substrate interface or the coating itself. The adhesion test results of the silane coupling agent chemically modified wood fiber XFMS water-based epoxy coating with different addition amounts on the carbon fiber composite material are shown in table 1.
TABLE 1 silane coupling agent chemical modified lignocellulosic XFMS usage and adhesion test results
When the usage amount of the silane coupling agent chemically modified wood fiber XFMS reaches 2.0 percent (based on the total weight of the main agent), the adhesive force is improved to reach the optimal effect, and reaches 5.22MPa, and compared with comparative example 1, the adhesive force is increased by 67.3 percent. And then the adhesive force is not obviously improved and gradually becomes stable along with the increase of the dosage of the silane coupling agent chemical modified wood fiber XFMS.
When the dosage of the silane coupling agent for chemically modifying wood fiber reaches 2.0 percent, the surface of the epoxy coating and the carbon fiber composite material substrate tends to be distributed and saturated, and the optimal addition amount for improving the adhesive force is achieved.

Claims (25)

1. Use of a two-component waterborne epoxy coating for a carbon fiber composite, the epoxy coating comprising the following components:
a) A main agent comprising an aqueous epoxy resin emulsion, said main agent further comprising silane coupling agent modified wood fibers;
b) A curing agent, which is used for curing the resin,
wherein the amount of component B) is from 5.0 to 25.0% by weight, based on the weight of component A),
the silane coupling agent has the structure of the following general formula (I)
YSiX 3 (I)
Wherein, the liquid crystal display device comprises a liquid crystal display device,
x is a hydrolyzable group selected from halogen, C 1-6 An alkoxy group, an acetoxy group,
y is C substituted by isocyanate groups 1-6 An alkyl group, a hydroxyl group,
wherein in component A) the weight ratio of the silane coupling agent to the wood fibers is from 0.05 to 0.15:1, and
wherein the epoxy resin emulsion is glycidyl ether epoxy resin and/or linear phenolic resin.
2. The use according to claim 1, wherein Y is an isocyanate-substituted C 1 -C 3 An alkyl group.
3. Use according to claim 1, wherein the amount of component B) is 7.5 to 20.0 wt%.
4. The use according to claim 3, wherein the amount of component B) is from 10.0 to 15.0% by weight.
5. Use according to claim 1, wherein in component a) the weight ratio of silane coupling agent to wood fibre is 0.08-0.12:1.
6. The use according to claim 1, wherein in component a) the weight ratio of the silane coupling agent modified wood fibers to the epoxy resin is from 0.005 to 0.15:1.
7. the use according to claim 6, wherein in component a) the weight ratio of the silane coupling agent modified wood fibers to the epoxy resin is 0.009-0.09:1.
8. The use according to claim 7, wherein in component a) the weight ratio of the silane coupling agent modified wood fibers to the epoxy resin is 0.036-0.086:1.
9. The use according to claim 8, wherein in component a) the weight ratio of the silane coupling agent modified wood fibers to the epoxy resin is 0.036-0.058:1.
10. The use according to claim 1, wherein in component a) the silane coupling agent modified wood fibres comprise 0.1-4.0 wt% of component a).
11. The use according to claim 10, wherein in component a) the silane coupling agent modified wood fibres comprise 0.2-3.5% by weight of component a).
12. The use according to claim 11, wherein in component a) the silane coupling agent modified wood fibres comprise 0.5-3.0 wt% of component a).
13. The use according to claim 12, wherein in component a) the silane coupling agent modified wood fibres comprise 1.8-2.2% by weight of component a).
14. The use according to claim 1, wherein in components a) and B) the silane coupling agent modified wood fibers comprise 0.35 to 3.5% by weight of the sum of components a) and B).
15. The use according to claim 14, wherein in components a) and B) the silane coupling agent modified wood fibres comprise 0.40 to 3.0% by weight of the sum of components a) and B).
16. The use according to claim 1, wherein the epoxy resin emulsion is a glycidyl ether type epoxy resin.
17. The use according to claim 1, wherein the epoxy resin has a number average molecular weight in the range 450-1700, determined according to GB/T21863-2008, and an epoxy equivalent of 227 to 833, determined according to the method GB/T4612-2008.
18. The use according to claim 17, wherein the number average molecular weight of the epoxy resin ranges from 454 to 1666.
19. The use according to claim 18, wherein the number average molecular weight of the epoxy resin ranges from 850 to 1000.
20. The use of claim 17, wherein the epoxy resin has an epoxy equivalent weight of 475 to 500.
21. The use according to claim 1, wherein the silane coupling agent is isocyanatoethylenetriethoxysilane.
22. Use according to claim 1, wherein the main agent comprises the following components, based on the total weight of the main agent:
the sum of the components is 100% by weight.
23. Use according to claim 1, wherein the B) curative is an amine curative selected from aliphatic amines, cycloaliphatic amines, aromatic amines, polyether amines, polyamidoamines and the amine curative resin has an amine number of 100-400mg KOH/g, determined according to DIN 16945/5.6.
24. The use of claim 23, wherein the B) curative is a fatty amine.
25. Use according to claim 23, wherein the amine hardener resin has an amine number of 160-180mg KOH/g.
CN202210535276.4A 2022-05-17 2022-05-17 Water-based epoxy resin coating and preparation method thereof Active CN114773955B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210535276.4A CN114773955B (en) 2022-05-17 2022-05-17 Water-based epoxy resin coating and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210535276.4A CN114773955B (en) 2022-05-17 2022-05-17 Water-based epoxy resin coating and preparation method thereof

Publications (2)

Publication Number Publication Date
CN114773955A CN114773955A (en) 2022-07-22
CN114773955B true CN114773955B (en) 2023-08-18

Family

ID=82436169

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210535276.4A Active CN114773955B (en) 2022-05-17 2022-05-17 Water-based epoxy resin coating and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114773955B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116535940B (en) * 2023-06-12 2023-10-13 深圳市昊日兴科技有限公司 Wear-resistant and conductive coordinated metal substrate coating and method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112457740A (en) * 2020-10-29 2021-03-09 内蒙古农业大学 Coupling agent modified nano-cellulose grafted epoxy resin composite water-based paint and preparation method thereof
CN114316738A (en) * 2021-12-30 2022-04-12 湖南宏泰新材料有限公司 Epoxy transparent primer coating for water-based carbon fiber substrate fishing rod

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112457740A (en) * 2020-10-29 2021-03-09 内蒙古农业大学 Coupling agent modified nano-cellulose grafted epoxy resin composite water-based paint and preparation method thereof
CN114316738A (en) * 2021-12-30 2022-04-12 湖南宏泰新材料有限公司 Epoxy transparent primer coating for water-based carbon fiber substrate fishing rod

Also Published As

Publication number Publication date
CN114773955A (en) 2022-07-22

Similar Documents

Publication Publication Date Title
JP6632969B2 (en) Additive to resin composition for improving impact strength and flexibility
SE524461C2 (en) Chain extended dendritic polyether, composition and use thereof
EP2867277B1 (en) An epoxy resin blend dispersion and a process for preparing the dispersion
WO2008122237A1 (en) A water-based paint varnish for automobile
CN114773955B (en) Water-based epoxy resin coating and preparation method thereof
CN107760167B (en) Water-based epoxy coating containing polyether modified water-based epoxy resin and preparation method thereof
EP2989167A2 (en) Additives to resin compositions for improved impact strength and flexibility
CN107353407B (en) Polyether compound having epoxy hydroxy carbamate and aqueous epoxy resin composition
EP2951225A1 (en) An epoxy resin composition,and its applications
CN112341604B (en) Emulsion type epoxy curing agent and preparation method thereof
NO143667B (en) APPLICATION OF A MAJOR EPOXYD RESIN DISPERSION AS CORROSION PROTECTION PAINTING
CN112341605A (en) Preparation method of waterborne orange peel epoxy curing agent and flat coating agent used in cooperation with waterborne orange peel epoxy curing agent
CN105860811A (en) Waterborne polyurethane paint and method for preparing same
CN105949958A (en) Waterborne epoxy modified polyamine curing agent and waterborne epoxy anti-corrosion primer coating
CN111253826A (en) Water-soluble silicon steel sheet paint and preparation process thereof
CN114573793A (en) Preparation method of waterborne epoxy curing agent based on addition of cardanol glycidyl ether
CN105949980A (en) Water-based polyurethane paint and preparation method thereof
WO2014003208A1 (en) Water-based epoxy resin emulsion
CN109266160A (en) A kind of single-component water-based paint and preparation method thereof with high anti-corrosive properties
CN106084238A (en) The preparation method of mute powder wetting dispersing agent
WO2021042285A1 (en) Self-emulsifying epoxy composition and the coating composition prepared from the same
TW201739853A (en) Polyether compounds having epoxy hydroxyl urethane groups and waterborne epoxy resin composition
CN117511344A (en) Water-based epoxy resin composition and preparation method and application thereof
WO2023099435A1 (en) Curing compositions for epoxy resin compositions
WO2023194444A1 (en) Coatings

Legal Events

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