CN108409932A - A kind of preparation method of modified epoxy and its application in anticorrosive paint - Google Patents
A kind of preparation method of modified epoxy and its application in anticorrosive paint Download PDFInfo
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- CN108409932A CN108409932A CN201810251836.7A CN201810251836A CN108409932A CN 108409932 A CN108409932 A CN 108409932A CN 201810251836 A CN201810251836 A CN 201810251836A CN 108409932 A CN108409932 A CN 108409932A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/6505—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6523—Compounds of group C08G18/3225 or C08G18/3271 or polyamines of C08G18/38
- C08G18/6535—Compounds of group C08G18/3271
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3271—Hydroxyamines
- C08G18/3275—Hydroxyamines containing two hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/58—Epoxy resins
- C08G18/584—Epoxy resins having nitrogen
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- 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
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- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- 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
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- 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
- C09D7/80—Processes for incorporating ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
Application the invention discloses a kind of preparation method of modified epoxy and its in anticorrosive paint.Using Multistep feeding technique, terminal hydroxy group modification is carried out to epoxy resin first, then aliphatic isocyanates are added to be modified, it is eventually adding diethanol amine and terminates reaction, polyurethane modified epoxy resin is made, by the material in anticorrosive paint, the compactness of epoxy resin anticorrosion coat and the caking property of film-forming resin and metal can be improved, the better anticorrosive paint of Corrosion Protection is made.
Description
Technical field
The invention belongs to the preparation method of technical field of coatings more particularly to a kind of modified epoxy and its in heavy antisepsis
Application in coating.
Background technology
The communal facilitys such as various large bridges, building, the vehicles, the mechanical equipment built by steel and production equipment are every
When often carve the erosions of the compounds such as water, oxygen, sulphur, chlorine all in being subjected to nature, every year due to steel gets rusty caused by economic damage
It loses and reaches tens billion of dollars；In order to protect steel from corroding, coating anticorrosive coating is the important measures for preventing corrosion, such as：In
State patent CN86104711 discloses a kind of anticorrosive paint and technique, uses epoxy-modified chlorination neoprene for main film forming matter
Matter, cyclohexanone, butyl acetate are solvent, and micaceous iron oxide, red lead powder are rust resisting pigment, using T31 as curing agent.It is adopted in the invention
Red lead powder, zinc chromate anti-corrosion paint contain the heavy metals such as lead, chromium, and have used solvent, have very to human body and environment
Big harm.
The type of anticorrosive coating is more, and epoxy resin is due to lot of advantages, such as high mechanical strength, chemical stability
Good, electrical insulating property is good, and shrinking percentage is low, heat-resist, intensity is high, easily processed into type and good to base material Adhesion property, wide
It is general to be applied in paint field.But epoxy resin is used to prepare anticorrosive paint that there are matter is crisp, impact resistance is poor, easy to aging, prevents
The undesirable defect of corrosive nature.It is at present poly- ammonia to the main method of modifying of epoxy resin therefore, it is necessary to be modified to it
Ester modified epoxy resin, i.e., under suitable condition so that the two forms inierpeneirating network structure, to reach raising epoxy resin
Toughness, while its intensity, the purpose of heat resistance are not reduced.
Existing polyurethane modified epoxy resin is used to prepare anticorrosive paint, there are the compactness of coating is poor, film forming tree
The caking property of fat and metal is bad, uses it for preparing anticorrosive paint and there is a problem of that antiseptic property is undesirable, limits it
Application.Therefore, a kind of novel modified epoxy is prepared, and it is existing heavy anti-to solve to use it for preparing anticorrosive paint
The rotten dissatisfactory defect of anticorrosion with coat performance is a technical problem to be solved urgently.
Invention content
In order to improve the compactness of epoxy resin anticorrosive paint coating and the caking property of film-forming resin and metal, it is made
The better anticorrosive paint of Corrosion Protection, the present invention provides a kind of modified epoxies, and use it for preparing solvent-free heavy
Anticorrosive paint.
The specific preparation method of modified epoxy of the present invention is：
(1) equivalent proportion for pressing reactant, E-20 epoxy resin is put into reaction kettle and is stirred, controlling reaction temperature
For：130~140 DEG C, diethanol amine is added dropwise thereto, 2~4h of insulation reaction obtains solvent-free terminal hydroxy group epoxy resin；
(2) the solvent-free terminal hydroxy group epoxy resin for obtaining step (1) cools down, and controlling reaction temperature is：50~70
DEG C, aliphatic carbimide, chlorobenzoyl chloride and diethanol amine, 2~3h of insulation reaction are added thereto and is then added, is made and changes
Property epoxy resin.
Wherein, the equivalent proportion of reactant is in step (1)：The equivalent proportion of epoxide equivalent and diethanol amine reactive hydrogen is：1：
1；The equivalent proportion of OH and NCO is in step (2)：1.8~2.0：1；Polymer molecular weight can be ensured according to such equivalent proportion
Size so that the molecular weight of reactant is controlled in 1500~2000 ranges.It solves because of polymer molecular weight distribution mistake
Salt fog resistance (molecular weight polymers hydrophily is strong) that is wide and generating reduces, the technology of mobility bad (macromolecular viscosity is high) is difficult
Topic provides safeguard for the follow-up high-performance anticorrosive paint for preparing.Using diethanol amine as reaction terminating agent, after synthesis procedure
Stage can eliminate remaining aliphatic carbimide monomer, ensure that manufactured polymer has splendid stability.
In addition, using Multistep feeding technique, the molecular structure and molecular weight distribution of polymer can be effectively controlled.
The present invention also provides the application of modified epoxy obtained, which is used to prepare solvent-free heavy antisepsis and applies
Material, preparation method are as follows：
(1) component A is prepared：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin：
Low molecular weight liquid epoxy resin, diglycidyl ether and unitary secondary amine are put into reaction kettle simultaneously by mass percentage
It is stirred, when being warming up to 60~80 DEG C, 2~4h of insulation reaction, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin.
Wherein, solvent-free terminal hydroxy group epoxy resin by mass percentage consisting of：Low molecular weight liquid epoxy resin：40~
60 parts, 15~30 parts of diglycidyl ether, 20~30 parts of unitary secondary amine.
2. pre-dispersed
Dispersant is added into step 1. solvent-free terminal hydroxy group epoxy resin obtained, progress is pre-dispersed, to promote to disperse
Medium between particles of material rapid osmotic and fully wetting cladding；
Wherein, dispersant be ammonium polyacrylate dipersant, dosage be solvent-free terminal hydroxy group epoxy resin quality 1~
3%.
3. preparing component A finished product：
By the 2/3 of pre-dispersed solvent-free terminal hydroxy group epoxy resin total amount, pigment, antifoaming agent input in paint can, stir
It is formed uniformly mill base, is used in combination milling apparatus to be dispersed to slurry fineness and is less than 15 μm, then remaining solvent-free terminal hydroxy group epoxy
Resin, recessed soil/polyaniline padding and catalyst put into above-mentioned mill base and are fully stirred evenly with blender, filter, pack be made
Component A finished product.
Wherein, pigment is one kind or two in 800 mesh trbasic zinc phosphates, 1250 mesh aluminium triphosphates or 1000 mesh micaceous iron oxides
Kind or more mixture, dosage is：The 5~10% of solvent-free terminal hydroxy group epoxy resin quality；
Antifoaming agent is the brokenly bubble polymer solution without organosilicon, and dosage is：Solvent-free terminal hydroxy group epoxy resin quality
0.2~0.5%；
Recessed soil/polyaniline padding dosage is the 10~15% of solvent-free terminal hydroxy group epoxy resin quality；
Catalyst is dimethyl ethanol ammonia or methyl diethanolamine, and dosage is solvent-free terminal hydroxy group epoxy resin quality
0.1~0.3%；
Milling apparatus uses new and effective alloy horizontal sand mill, and mating ultra hard ceramic zirconium pearl is abrasive media, with more
Platform sand mill tandem continuous production technology, it is ensured that the particle rapid dispersion of reunion is reduced into primary particle.
(2) B component is prepared：As modified epoxy of the invention.
(3) solvent-free anticorrosive paint is prepared：Component A finished product and B component finished product are pressed 3:1 mass ratio is mixed and stirred for
Uniformly, solvent-free anticorrosive paint is made.
Using brushing or the method for roller coating is constructed, after coating spontaneously dries at normal temperatures, that is, formed solvent-free recessed soil/
Polyaniline anticorrosion coat.
Advantageous effect：
(1) present invention uses aliphatic carbimide substituted aromatic isocyanates, excellent using aliphatic carbimide
Uvioresistant and toughness feature, improve the anti-corrosion effect of anticorrosive paint.
(2) since diethanol amine and polyaniline have good compatibility, the storage stability of coating, polyphenyl can be improved
Amine can adsorbed close generate redox reaction with it in steel surface and form fine and close passivation protection layer, further increase painting
The antiseptic property of layer；
(3) equivalent proportion of control reaction raw materials can ensure the size of polymer molecular weight, solve because of polymer molecule
Measure that distribution is wide and the salt fog resistance that generates reduces, the bad technical barrier of mobility.
(4) pre-dispersed technique is used, in conjunction with the measures such as material absorption water, air are removed in vacuo, promotes decentralized medium in material
Expect particle between rapid osmotic and fully wetting coat；Dispersion stabilization of the high material in coating has been carried, has solved material because of surface
The coarse problem of secondary agglomeration that free energy is big and generates.
Description of the drawings
Fig. 1 is the process flow chart of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to embodiment：
Embodiment 1
(1) component A is prepared：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin：
45 parts of low molecular weight liquid epoxy resin, 25 parts of diglycidyl ethers and 30 parts of unitary secondary amine are put into reaction kettle simultaneously
Stirring, when being warming up to 80 DEG C, insulation reaction 3h, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin.
2. pre-dispersed
1 part of ammonium polyacrylate dipersant is added into step 1. solvent-free terminal hydroxy group epoxy resin obtained, carries out pre-
Dispersion.
3. preparing component A finished product：
By 2/3,5 part of 800 mesh trbasic zinc phosphates of pre-dispersed solvent-free terminal hydroxy group epoxy resin total amount, 0.2 part of Bi Keization
BYK-051 antifoaming agent, stirs evenly to form mill base, is used in combination the efficient alloy horizontal sand mill, mating ultra hard ceramic zirconium pearl to be
Abrasive media is dispersed to slurry fineness and is less than 15 μm, then remaining solvent-free terminal hydroxy group epoxy resin, 10 parts of recessed soil/poly-
Aniline filler and 0.1 part of dimethyl ethanol ammonia catalyst put into above-mentioned mill base and are fully stirred evenly with blender, filter, wrap
Component A finished product is made in dress.
(2) B component is prepared：Equivalent proportion by epoxide equivalent and diethanol amine reactive hydrogen is：1：1 equivalent proportion, by E-20
Epoxy resin is put into reaction kettle and is stirred, and controlling reaction temperature is：130 DEG C, diethanol amine is added dropwise thereto, heat preservation is anti-
2h is answered, solvent-free terminal hydroxy group epoxy resin is obtained；Cooling, and controlling reaction temperature is：60 DEG C, the equivalent proportion by OH and NCO is：
1.8：Aliphatic carbimide and diethanol amine is added in 1 equivalent proportion thereto, and 0.005 part of chlorobenzoyl chloride, heat preservation is added
2h is reacted, modified epoxy is made.
It is constructed using the method for brushing, after coating spontaneously dries at normal temperatures, that is, forms solvent-free recessed soil/polyphenyl
Amine anticorrosion coat.
Embodiment 2
(1) component A is prepared：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin：
55 parts of low molecular weight liquid epoxy resin, 25 parts of diglycidyl ethers and 20 parts of unitary secondary amine are put into reaction kettle simultaneously
Stirring, when being warming up to 70 DEG C, insulation reaction 3h, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin.
2. pre-dispersed
1.5 parts of ammonium polyacrylate dipersants are added into step 1. solvent-free terminal hydroxy group epoxy resin obtained, carry out
It is pre-dispersed.
3. preparing component A finished product：
By 2/3,8 part of 1250 mesh aluminium triphosphates of pre-dispersed solvent-free terminal hydroxy group epoxy resin total amount, 0.2 part
The BYK-051 antifoaming agent of Bi Ke chemistry, stirs evenly to form mill base, and efficient alloy horizontal sand mill, mating ultra hard ceramic is used in combination
Zirconium pearl is abrasive media, is dispersed to slurry fineness and is less than 15 μm, then remaining solvent-free terminal hydroxy group epoxy resin, 12 parts
Recessed soil/polyaniline padding and 0.1 part of dimethyl ethanol ammonia catalyst put into above-mentioned mill base and are fully stirred evenly with blender,
Component A finished product is made in filtering, packaging.
(2) B component is prepared：With embodiment 1.
(3) solvent-free anticorrosive paint is prepared：Component A finished product and B component finished product are pressed 3:1 mass ratio is mixed and stirred for
Uniformly, solvent-free recessed soil/polyaniline anticorrosive paint is made.
It is constructed using the method for roller coating, after coating spontaneously dries at normal temperatures, that is, forms solvent-free recessed soil/polyphenyl
Amine anticorrosion coat.
Embodiment 3
(1) component A is prepared according to the following steps：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin：
60 parts of low molecular weight liquid epoxy resin, 20 parts of diglycidyl ethers and 20 parts of unitary secondary amine are put into reaction kettle simultaneously
Stirring, when being warming up to 65 DEG C, insulation reaction 3h, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin.
2. pre-dispersed
1.5 parts of ammonium polyacrylate dipersants are added into step 1. solvent-free terminal hydroxy group epoxy resin obtained, carry out
It is pre-dispersed.
3. preparing component A finished product：
By 2/3,8 part of 1250 mesh aluminium triphosphates of pre-dispersed solvent-free terminal hydroxy group epoxy resin total amount, 0.2 part
The BYK-051 antifoaming agent of Bi Ke chemistry, stirs evenly to form mill base, and efficient alloy horizontal sand mill, mating ultra hard ceramic is used in combination
Zirconium pearl be abrasive media, be dispersed to slurry fineness be less than 15 μm, then remaining solvent-free terminal hydroxy group epoxy resin, 15 parts it is recessed
Soil/polyaniline padding and 0.1 part of dimethyl ethanol ammonia catalyst put into above-mentioned mill base and are fully stirred evenly with blender, mistake
Component A finished product is made in filter, packaging.
(2) B component is prepared：With embodiment 1.
(3) solvent-free anticorrosive paint is prepared：Component A finished product and B component finished product are pressed 3:1 mass ratio is mixed and stirred for
Uniformly, solvent-free recessed soil/polyaniline anticorrosive paint is made.
It is constructed using the method for brushing, after coating spontaneously dries at normal temperatures, that is, forms solvent-free recessed soil/polyphenyl
Amine anticorrosion coat.
Embodiment 4
(1) component A is prepared：With embodiment 2
(2) B component is prepared：Equivalent proportion by epoxide equivalent and diethanol amine reactive hydrogen is：1：1 equivalent proportion, by E-20
Epoxy resin is put into reaction kettle and is stirred, and controlling reaction temperature is：140 DEG C, diethanol amine is added dropwise thereto, heat preservation is anti-
2h is answered, solvent-free terminal hydroxy group epoxy resin is obtained；Cooling, and controlling reaction temperature is：50 DEG C, the equivalent proportion by OH and NCO is：
2：Aliphatic carbimide and diethanol amine is added in 1 equivalent proportion thereto, and 0.005 part of chlorobenzoyl chloride, insulation reaction is added
Modified epoxy is made in 3h.
It is constructed using the method for roller coating, after coating spontaneously dries at normal temperatures, that is, forms solvent-free recessed soil/polyphenyl
Amine anticorrosion coat.
Comparative example 1
(1) component A is prepared：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin：
55 parts of low molecular weight liquid epoxy resin, 25 parts of diglycidyl ethers and 20 parts of unitary secondary amine are put into reaction kettle simultaneously
Stirring, when being warming up to 70 DEG C, insulation reaction 3h, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin.
2. pre-dispersed
1.5 parts of ammonium polyacrylate dipersants are added into step 1. solvent-free terminal hydroxy group epoxy resin obtained, carry out
It is pre-dispersed.
3. preparing component A finished product：
By 2/3,8 part of 1250 mesh aluminium triphosphates of pre-dispersed solvent-free terminal hydroxy group epoxy resin total amount, 0.2 part
The BYK-051 antifoaming agent of Bi Ke chemistry, stirs evenly to form mill base, and efficient alloy horizontal sand mill, mating ultra hard ceramic is used in combination
Zirconium pearl is abrasive media, is dispersed to slurry fineness and is less than 15 μm, then remaining solvent-free terminal hydroxy group epoxy resin, 12 parts
Recessed soil/polyaniline padding and 0.1 part of dimethyl ethanol ammonia catalyst put into above-mentioned mill base and are fully stirred evenly with blender,
Component A finished product is made in filtering, packaging.
(2) B component is prepared：By the R-1541 isocyanate modified epoxy resins of chemical (Kunshan) Co., Ltd of rising sun subelectron
Stoste is dispensed as B component finished product.
(3) solvent-free anticorrosive paint is prepared：Component A finished product and B component finished product are pressed 3:1 mass ratio is mixed and stirred for
Uniformly, solvent-free recessed soil/polyaniline anticorrosive paint is made.
It is constructed using the method for roller coating, after coating spontaneously dries at normal temperatures, that is, forms solvent-free recessed soil/polyphenyl
Amine anticorrosion coat.
Comparative example 2
(1) component A is prepared：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin：
55 parts of low molecular weight liquid epoxy resin, 25 parts of diglycidyl ethers and 20 parts of unitary secondary amine are put into reaction kettle simultaneously
Stirring, when being warming up to 70 DEG C, insulation reaction 3h, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin.
2. preparing component A finished product：
2/3,8 part of 1250 mesh aluminium triphosphates of solvent-free terminal hydroxy group epoxy resin total amount, 0.2 part of Bi Ke is chemical
BYK-051 antifoaming agent, stirs evenly to form mill base, and it is grinding that efficient alloy horizontal sand mill, mating ultra hard ceramic zirconium pearl, which is used in combination,
Medium is dispersed to slurry fineness and is less than 15 μm, then remaining solvent-free terminal hydroxy group epoxy resin, 12 parts of recessed soil/polyphenyl
Amine filler and 0.1 part of dimethyl ethanol ammonia catalyst put into above-mentioned mill base and are fully stirred evenly with blender, filter, pack
Component A finished product is made.
(2) B component is prepared：With embodiment 1.
(3) solvent-free anticorrosive paint is prepared：Component A finished product and B component finished product are pressed 3:1 mass ratio is mixed and stirred for
Uniformly, solvent-free recessed soil/polyaniline anticorrosive paint is made.
It is constructed using the method for roller coating, after coating spontaneously dries at normal temperatures, that is, forms solvent-free recessed soil/polyphenyl
Amine anticorrosion coat.
1 each embodiment of table and comparative example the performance test results
The solvent-free anticorrosive paint prepared using modified epoxy made from the method for the present invention, greatly improves coating
Rustless property and adhesive property increase the consistency of coating, improve the rust-proof effect of coating；The present invention is suitable for steel material
The surfaces corrosion protections such as bridge, ship, pylon, time (machine) the vehicle Room, workshop, the stadiums of matter composition.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (8)
1. a kind of preparation method of modified epoxy, it is characterised in that：The preparation method technique is as follows：
(1) equivalent proportion for pressing reactant, E-20 epoxy resin is put into reaction kettle and is stirred, controlling reaction temperature is：
130~140 DEG C, diethanol amine is added dropwise thereto, 2~4h of insulation reaction obtains solvent-free terminal hydroxy group epoxy resin；
(2) the solvent-free terminal hydroxy group epoxy resin for obtaining step (1) cools down, and controlling reaction temperature is：50~70 DEG C, Xiang Qi
Modified epoxy is made in middle addition aliphatic carbimide, chlorobenzoyl chloride and diethanol amine, 2~3h of insulation reaction.
2. the preparation method of modified epoxy according to claim 1, it is characterised in that：Reactant in step (1)
Equivalent proportion is：The equivalent proportion of epoxide equivalent and diethanol amine reactive hydrogen is：1：1.
3. the preparation method of modified epoxy according to claim 1, it is characterised in that：OH and NCO in step (2)
Equivalent proportion is：1.8~2.0：1.
4. a kind of application of modified epoxy prepared by method according to claim 1, it is characterised in that：The modified ring
Oxygen resin is used to prepare solvent-free anticorrosive paint.
5. the application of modified epoxy according to claim 4, it is characterised in that：The solvent-free anticorrosive paint
Preparation method is as follows：
(1) component A is prepared：
1. the synthesis of solvent-free terminal hydroxy group epoxy resin
Low molecular weight liquid epoxy resin, diglycidyl ether and unitary secondary amine are put into reaction kettle and are carried out by mass percentage
Stirring, when being warming up to 60~80 DEG C, 2~4h of insulation reaction, cooling, discharging obtains solvent-free terminal hydroxy group epoxy resin；
2. pre-dispersed
Dispersant is added into step 1. solvent-free terminal hydroxy group epoxy resin obtained, carries out pre-dispersed；
3. preparing component A finished product
By step 2. pre-dispersed solvent-free terminal hydroxy group epoxy resin total amount 2/3, pigment, antifoaming agent input in paint can, stir
It mixes and is formed uniformly mill base, be used in combination milling apparatus to be dispersed to slurry fineness and be less than 15 μm, then remaining solvent-free terminal hydroxy group ring
Oxygen resin, recessed soil/polyaniline padding and catalyst put into above-mentioned mill base and are fully stirred evenly with blender, filter, the system of packing
Obtain component A finished product；
(2) solvent-free anticorrosive paint is prepared：Component A finished product and the modified epoxy as B component are pressed 3:1 mass ratio
It is mixed and stirred for uniformly, solvent-free anticorrosive paint being made.
6. the application of modified epoxy according to claim 5, it is characterised in that：The solvent-free terminal hydroxy group asphalt mixtures modified by epoxy resin
Fat by mass percentage consisting of：Low molecular weight liquid epoxy resin：40~60 parts, 15~30 parts of diglycidyl ether, unitary
20~30 parts of secondary amine.
7. the application of modified epoxy according to claim 5, it is characterised in that：The dispersant is ammonium polyacrylate
Salt, dosage are the 1~3% of solvent-free terminal hydroxy group epoxy resin quality.
8. the application of modified epoxy according to claim 5, it is characterised in that：The antifoaming agent is without organosilicon
Brokenly bubble polymer solution, dosage be solvent-free terminal hydroxy group epoxy resin quality 0.2~0.5%；Pigment is 800 mesh phosphoric acid
The mixture of one or more of zinc, 1250 mesh aluminium triphosphates or 1000 mesh micaceous iron oxides, dosage are：Without molten
The 5~10% of agent terminal hydroxy group epoxy resin quality；Recessed soil/polyaniline padding the dosage is solvent-free terminal hydroxy group asphalt mixtures modified by epoxy resin lipid
The 10~15% of amount；The catalyst is dimethyl ethanol ammonia or methyl diethanolamine, and dosage is solvent-free terminal hydroxy group epoxy
The 0.1~0.3% of resin quality.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112480780A (en) * | 2020-11-21 | 2021-03-12 | 杨涛涛 | Anticorrosive paint and preparation method and application thereof |
| CN113637388A (en) * | 2021-08-20 | 2021-11-12 | 国网福建省电力有限公司电力科学研究院 | Isocyanate-based epoxy resin antirust primer |
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