CN107446476A - A kind of automobile chassis system-specific bottom surface unification polyurea protection coating and preparation method - Google Patents
A kind of automobile chassis system-specific bottom surface unification polyurea protection coating and preparation method Download PDFInfo
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- CN107446476A CN107446476A CN201710677913.0A CN201710677913A CN107446476A CN 107446476 A CN107446476 A CN 107446476A CN 201710677913 A CN201710677913 A CN 201710677913A CN 107446476 A CN107446476 A CN 107446476A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
A kind of automobile chassis system-specific bottom surface unification polyurea protection coating and preparation method, the coating is by component A and B component according to 1:2~4 volume ratio mixture forms：The component A includes isocyanates, polysulfide modified epoxy resin and diluent；The B component includes aliphatic biosynthesis block amine carbamide resin, coloring pigment, filler, graphene slurry, organic zinc, dispersant, UV absorbers, UV light stabilizing agent, anti-settling agent, levelling agent, defoamer, flatting silica and solvent.Present invention additionally comprises the preparation method of automobile chassis system-specific bottom surface unification polyurea protection coating.Disposable film forming thickness >=80 μm of coating of the present invention；Dried coating film speed is fast, and efficiency of construction is high；Coating is strong with substrate adhesion, and impact resistance is good, long-term outdoor exposure is non-discolouring, and product ageing-resistant performance, salt spray resistance, medium-resistance are splendid, and product is solid containing height, environment-friendly；The inventive method technique is simple, and cost is low, is suitable for industrialized production.
Description
Technical field
The present invention relates to a kind of polyurea protection coating and preparation method, and in particular to a kind of automobile chassis system-specific bottom surface
Unify polyurea protection coating and preparation method.
Background technology
It is increasing with the yield of automobile, from the aspect of production efficiency, the chassis system of automobile factory, including car at present
The coating that the parts such as frame, back axle, leaf spring, power transmission shaft use is epoxy acrylic electrophoretic coating, or epoxy acrylic bottom surface is closed
One coating, still, above-mentioned coating ageing-resistant performance are bad, under the salt spray resistance straight line that film is may result in after film efflorescence
Drop.Some automobiles are also in company's warehouse for finished product, and the defects of chassis system occurs as soon as serious efflorescence and corrosion, some outlet cars are by sea
Upper transport, chassis system have just had rusty stains.Such case brings very big puzzlement to the after-sale service of producer, while
It greatly have impact on the market reputation of automobile factory.In order to solve the above problems, automobile factory, which needs badly, finds a kind of rate of drying soon, completely
Sufficient automobile factory's site operation efficiency requirements, the performance such as ageing-resistant, salt spray resistance and media-resistant is all good, meanwhile, for national ring
The consideration of guarantor's policy, automobile factory needs product admittedly containing height, VOC emission meets environmental requirement and limits of harmful substances meets automobile
The high-performance bottom surface unification coating of coating related request.
CN102796451A discloses a kind of long-effective corrosion, weather-proof, ultrafast dried paint and preparation method and application, is with poly-
Lucid asparagus coating improves prior art, still, the coating thickness of the coating no more than 50 μm, coating have to be used in by
On the steel of processing, bottom surface unification coating can not be done, while the salt-fog resistant time of the coating only has 500h, and vehicle frame can not be played
Long-lasting protection.
CN104893523A discloses a kind of engineering machinery poly- lucid asparagus coating of extremely low VOC self-drying types, is by poly- Tianmen
Winter propylhomoserin ester paint is applied to engineering machinery and improves prior art, and still, the salt spray resistance of the coating is 720h, and existing
Technology compares no substantial lifting.
CN105462484A discloses a kind of weather-proof primer-topcoat integrated anticorrosive coating of large arch dam polyaspartic ester, is with poly-
Asparatate ester paint improves prior art, substitutes existing bottom surface unification coating, still, the time of doing solid work of the coating is
10h, it is impossible to meet industrial pipelining, while the resistance to QUV ageing times of the coating are 1000h, with existing product phase
Than not having greatly improved.
Therefore, a kind of fast drying for automobile chassis system, the high-performance bottom that combination property is good, environmentally friendly are developed
Face unification polyurea protection coating is extremely urgent.
The content of the invention
The technical problems to be solved by the invention are to overcome drawbacks described above existing for prior art, there is provided one kind dries speed
Degree is fast, and ageing-resistant, salt spray resistance and medium-resistance are all good, and product is solid containing high, environmentally friendly automobile chassis system-specific
Unify polyurea protection coating in bottom surface.
Further technical problems to be solved of the invention are to overcome drawbacks described above existing for prior art, there is provided Yi Zhonggong
Skill is simple, and cost is low, is suitable for the preparation side of the automobile chassis system-specific bottom surface unification polyurea protection coating of industrialized production
Method.
The technical solution adopted for the present invention to solve the technical problems is as follows：A kind of automobile chassis system-specific bottom surface unification
Polyurea protection coating, by component A and B component according to 1:2~4 volume ratio mixture forms：The component A include isocyanates,
Polysulfide modified epoxy resin and diluent；The B component include aliphatic biosynthesis block amine carbamide resin, coloring pigment, filler,
Graphene slurry, organic zinc, dispersant, UV absorbers, UV light stabilizing agent, anti-settling agent, levelling agent, defoamer, delustring
Powder and solvent.Primarily as curing agent, the hydroxyl on polysulfide modified epoxy resin side chain can be carried out anti-component A with isocyanates
Should.For B component primarily as base-material, B component makes product by adding different types of aliphatic biosynthesis block amine carbamide resin
Reach in pot-life and on drying time a balance；The organic zinc of addition is compounded with graphene slurry, to product salt tolerant
Mist performance and medium-resistance can play coordinative role；Graphene slurry is good with Miscibility, can improve production well
The compactness and hydrophobicity of product, so as to improve the performances such as the ageing-resistant of coating, salt spray resistance.Polysulfide modified epoxy tree in component A
Fat can be reacted with epoxide group with the aliphatic biosynthesis block amine carbamide resin in B component, while flatting silica in B component
Methylol can be reacted with isocyanates in component A.Therefore, the chemistry that several types in coating system simultaneously be present is anti-
Should, different types of crosslinking is formed, has obtained a kind of interpenetrating networks, serves unexpected effect.
Preferably, in a kind of automobile chassis system-specific bottom surface unification polyurea protection coating, the parts by weight of each raw material
For：The component A includes 5~15 parts of 55~85 parts of isocyanates, 10~30 parts of polysulfide modified epoxy resin and diluent；It is described
B component includes 25~50 parts of aliphatic biosynthesis block amine carbamide resin, 3~20 parts of coloring pigment, 10~35 parts of filler, graphene
5~15 parts of slurry, 5~15 parts of organic zinc, 0.3~1.0 part of dispersant, 0.5~1.5 part of UV absorbers, ultraviolet light stabilized
0.5~1.5 part of agent, 0.2~1.0 part of anti-settling agent, 0.2~1.0 part of levelling agent, 0.2~1.0 part of defoamer, 1~6 part of flatting silica
With 5~15 parts of solvent.Various raw material usages could meet product indices requirement only in the scope.
Preferably, in component A, the isocyanates is hexamethylene diisocyanate trimer.It is highly preferred that described six
Methylene diisocyanate tripolymer is the one or more in N3790, N3800, N3300 or N3390 of Bayer production etc..This
Invention is carried out reasonably combined from rigidity and flexible isocyanate, makes the pot-life and drying time, product hardness and soft of product
Toughness all reaches a dynamic equilibrium.
Preferably, in component A, the polysulfide modified epoxy resin is the fat of Beijing skill Development Co., Ltd of Tian Heng Rehabilitation
Adoption sulphur modification epoxy resin S15 or EPS25.The polysulfide modified epoxy resin avoids ordinary epoxy resin resistance to ag(e)ing
The problem of poor, while the resin can significantly improve the salt spray resistance and chemical resistance of film.
Preferably, in component A, the diluent is dehydration dimethylbenzene and dehydration acetate N-butyl.
Preferably, in B component, the aliphatic biosynthesis block amine carbamide resin is F420, the F524 for flying upward Chemical Manufacture
Or F520, K8420, K8428 or K8520 of your Chemical Manufacture of Guangzhou gold platinum, JH-8122, JH- of Shanghai fine horse and Chemical Manufacture
One or more in 8142 or JH-8152 etc..
Preferably, in B component, the coloring pigment is in high-carbon black pigment, rutile titanium dioxide, lemon Huang or phthalocyanine blue etc.
One or more.The carbon black MA-100 of the high-carbon black pigment more preferably Mitsubishi Chemical Manufacture, the rutile type titanium
The titanium white R930 of white more preferably Japanese stone original Chemical Manufacture.
Preferably, in B component, the filler is one kind or several in mica powder, talcum powder, kaolin or barium sulfate etc.
Kind.
Preferably, in B component, the graphene slurry is by graphene and N- methylpyrrolidones with 10:60~90（It is more excellent
Select 10:70~80）Quality formed than mixture.Graphene is a kind of carbon material of two-dimensional layered structure, can significantly improve product
Compactness and hydrophobicity, so as to improve the water resistance of product, salt spray resistance and medium-resistance.Graphene is with slurry shape
Formula is added in B component, can improve dispersiveness and compatibility of the graphene in base-material.
Preferably, in B component, the organic zinc is in ZPN- I, ZPN- II or ZPN- III of the production of Guangxi Xin Jing companies etc.
One or more.The more preferably ZPN- I of Guangxi Xin Jing companies production.The organic zinc avoids zinc powder and can not grind and cause
The problem of film fineness is difficult to meet finish paint requirement, while organic zinc and graphene slurry are reasonably combined, antiseptic effect substantially carries
It is high.
Preferably, in B component, the dispersant be Bi Ke companies production BYK-110, BYK-161, BYK-163 or
One or more in BYK-ATU etc..
Preferably, in B component, the UV absorbers are BASF 384-2, UV-1 is learned in Qidong gold beautification, Tianjin profit
Pacify the one or more in Longhua work 1130 or Taiwan double bond chemical industry CS5530 etc..
Preferably, in B component, the UV light stabilizing agent is BASF 123, Qidong gold beautification LS-292, Tianjin profit
Pacify the one or more in Longhua work 7292 or Taiwan double bond chemical industry CS292 etc..
Preferably, in B component, the anti-settling agent is Degussa R972.
Preferably, in B component, the levelling agent is polyether-modified dimethyl silicone polymer, acrylate interpolymer or fluorine
One or more in carbon polymer etc..
Preferably, in B component, the defoamer is modified polyorganosiloxane or organosilicon polymer.
Preferably, in B component, the flatting silica is one in organic quenching powder M4, M5 or M6 of Albemarle Corporation's production etc.
Kind is several.The active group methylol of the flatting silica can be crosslinked with isocyanates, improve adhesive force and the friendship of product
Join density, so as to improve the water-fast and salt spray resistance of coating；Flatting silica influences small on the viscosity and mobility of coating simultaneously, has
Beneficial to raising coating application efficiency and surface effect.
Preferably, in B component, the solvent is dimethylbenzene, n-butyl acetate, propylene glycol methyl ether acetate or ethyl acetate
One or more in.
Technical scheme is as follows used by the present invention further solves its technical problem：A kind of automobile chassis system-specific bottom
The preparation method of polyurea protection coating is unified in face, comprises the following steps：
（1）The preparation method of component A：First isocyanates and polysulfide modified epoxy resin are added in reactor, at the uniform velocity stirring adds
Heat, the weight/mass percentage composition of insulation reaction to isocyano reach 11~19%（More preferably 14~18%）Afterwards, cool down, add
Diluent, stir, obtain component A；
（2）The preparation method of B component：First by some aliphatic biosynthesis block amine carbamide resin and coloring pigment, filler, organic
After zinc, dispersant, anti-settling agent, defoamer and partial solvent mixing, disperseed, be then ground into slurry with basket type sand mill,
Add remaining aliphatic biosynthesis block amine carbamide resin and graphene slurry, UV absorbers, ultraviolet light in the slurry again
Stabilizer, levelling agent, flatting silica and remaining solvent are reconciled, and filtering, obtain B component；
（3）By step（1）Gained component A and step（2）Gained B component is according to 1:2~4 volume ratio mixture,.
Preferably, step（1）In, the speed at the uniform velocity stirred is 120~180r/min.If mixing speed is too low,
The time that raw material is mixed evenly can extend, so as to extend the reaction complete time；If mixing speed is too fast, shearing force can increase
Greatly, material temperature rises, isocyanates meeting autohemagglutination, so as to influence product quality.
Preferably, step（1）In, the temperature of the heating is 80 ± 3 DEG C, and the time of the insulation reaction is 2~4h.If
Heating-up temperature is too low, then raw material reaction is incomplete；If heating-up temperature is too high, isocyanates autohemagglutination can be caused, so as to influence to produce
Quality.If soaking time is too short, raw material reaction is incomplete；If soaking time is long, energy waste can be caused, influences to give birth to
Produce efficiency.
Preferably, step（1）In, it is described to be cooled to 50 ± 3 DEG C.
Preferably, step（1）In, the mixing speed added after diluent is 80~140 r/min, and the time of stirring is 30
~60min.If mixing speed is too low, the well mixed time can extend, so as to influence production efficiency；If mixing speed mistake
Height, then can cause that material temperature is too high, and solvent can volatilize, so as to cause to waste and environmental pollution.It is former if mixing time is too short
Material mixing is uneven, so as to influence product quality；If mixing time is long, energy waste can be caused, influences production efficiency.
Step（1）In, the purpose for detecting the weight/mass percentage composition of isocyano is to judge that isocyanates and polysulfide are modified ring
Whether oxygen resin reaction is complete.It is to allow two kinds of raw material to be filled first to add isocyanates and the purpose of polysulfide modified epoxy resin
Divide and efficiently react, rear addition diluent is to reduce product viscosity, is easy to pack and constructs.
Preferably, step（2）In, the mass ratio of the aliphatic biosynthesis block amine carbamide resin successively added is 1:0.2~
0.8, the mass ratio of the solvent successively added is 1:0.2~1.0.First add some aliphatic biosynthesis block amine carbamide resin be for
Improve the dispersion effect and production efficiency of color stuffing；Afterwards add some aliphatic biosynthesis block amine carbamide resin purpose be in order to
More preferable covered effect is got to color stuffing, improves the storage stability of product.It is in order that obtaining slurry first to add partial solvent
There is higher viscosity, improve the dispersion effect of color stuffing；Partial solvent is added afterwards and is advantageous to product packaging, improves production efficiency.
Step（2）In, some raw materials first disperse, and the purpose disperseed after some raw materials is to make color stuffing can be more preferable in system
It is scattered, improve the storage stability of product, while improve the production efficiency of product.
Preferably, step（2）In, the scattered speed is 800~1200 r/min, the scattered time is 30~
60min.If rate of dispersion is too low, dispersion effect is poor；If rate of dispersion is too high, material temperature rises, and accelerates solvent to wave
Hair, produce product quality problem and environmental pollution.If jitter time is too short, product mix is uneven, produces product quality and asks
Topic；If jitter time is long, energy waste is caused, reduces production efficiency.
Preferably, step（2）In, it is described to be ground to fineness≤20 μm.
Preferably, step（2）In, the speed of the mediation is 300~500 r/min, time of mediation for 45~
90min.If the speed reconciled is too low, dispersion effect is poor；If the speed that reconciles is too high, material temperature rises, and accelerates solvent
Volatilization, produce product quality problem and environmental pollution.If the time reconciled is too short, product mix is uneven, produces production quality
Amount problem；If the overlong time reconciled, causing energy waste, production efficiency is reduced.
Preferably, step（2）In, filtered with the silk of 100~300 mesh.
Beneficial effects of the present invention are as follows：
（1）Unification polyurea protection coating in automobile chassis system-specific bottom surface of the present invention can be with direct spraying in automobile chassis system steel
Material surface, disposable film forming thickness >=80 μm, meet the index request of motor corporation；Dried coating film speed is fast, and drying mode can
Any adjustment, efficiency of construction is high, so as to meet motor corporation's site operation pipelining requirement；Coating and automobile chassis system
Substrate adhesion is strong, and impact resistance is good, long-term outdoor exposure is non-discolouring, product ageing-resistant performance, salt spray resistance, resistance to medium
Can have good.Product can effectively solve the problems such as easy efflorescence of automobile chassis system, change colour, get rusty, and be provided to automobile chassis system
Comprehensive protection；Meanwhile polyurea protection coating products of the present invention are solid containing height, belong to environmentally friendly, its application can improve vapour
The overall application of car is horizontal, the market competitiveness of lifting automobile, has wide market prospects；
（2）The inventive method technique is simple, and cost is low, is suitable for industrialized production.
Embodiment
With reference to embodiment, the invention will be further described.
Isocyanates hexamethylene diisocyanate trimer N3790, N3800 used in the embodiment of the present invention,
N3390, N3300 are purchased from Bayer；Used polysulfide modified epoxy resin EPS15, EPS25 are purchased from Beijing Tian Heng Rehabilitation skill
Development Co., Ltd；Used aliphatic biosynthesis block amine carbamide resin F420, F524, F520, which are purchased from, flies upward chemical industry, institute
Aliphatic biosynthesis block amine carbamide resin K8420, K8428, the K8520 used is purchased from Guangzhou gold platinum that chemical industry；It is used
Coloring pigment carbon black MA-100 is purchased from Mitsubishi chemical industry, and titanium white R930 is purchased from Japanese stone original chemical industry；Used organic zinc
ZPN- I is purchased from Guangxi Xin Jing companies；Used dispersant B YK-110, BYK-ATU are purchased from Bi Ke companies；It is used anti-
Heavy agent R972 is purchased from Degussa；Used graphene slurry is by graphene and N- methylpyrrolidones with 10:80 mass ratio
Mixture forms；Used UV absorbers 384-2 is purchased from BASF, and UV absorbers CS5530 is purchased from Taiwan double bond
Work；Used UV light stabilizing agent CS292 is purchased from Taiwan double bond chemical industry, and UV light stabilizing agent 123 is purchased from BASF；Used
Organic quenching powder M4, M5, M6 be purchased from Albemarle Corporation.
Chemical reagent used in the embodiment of the present invention, unless otherwise specified, obtained by routine business approach.
Embodiment 1~3
A kind of automobile chassis system-specific bottom surface unification polyurea protection Paint Examples 1~3
The parts by weight of each raw material are as shown in table 1：
A kind of parts by weight table of 1~3 each raw material of automobile chassis system-specific bottom surface unification polyurea protection Paint Examples of table 1
Note："-" represents to be not added with table.
A kind of preparation method embodiment 1 of automobile chassis system-specific bottom surface unification polyurea protection coating
（1）The preparation method of component A：According to each parts by weight of raw materials described in the embodiment 1 of table 1, first isocyanates and polysulfide are modified
Epoxy resin is added in reactor, under 180r/min, 83 DEG C, insulation reaction 4h is at the uniform velocity heated with stirring to, to isocyano
After weight/mass percentage composition reaches 14.5%, 48 DEG C are cooled to, adds diluent, under 120r/min, stirred 35min, obtain A groups
Point；
（2）The preparation method of B component：According to each parts by weight of raw materials described in the embodiment 1 of table 1, first by some aliphatic biosynthesis block
After amine carbamide resin mixes with coloring pigment, filler, organic zinc, dispersant, anti-settling agent, defoamer and partial solvent, in 800r/
Under min, disperse 40min, be then ground with basket type sand mill to fineness≤15 μm, obtain slurry, then add in the slurry surplus
Remaining aliphatic biosynthesis block amine carbamide resin and graphene slurry, UV absorbers, UV light stabilizing agent, levelling agent, disappear
Light powder and remaining solvent, under 350r/min, mediation 50min, filtered with the silk of 200 mesh, obtain B component；
（3）By step（1）Gained component A and step（2）Gained B component is according to 1:2 volume ratio mixture,.
A kind of preparation method embodiment 2 of automobile chassis system-specific bottom surface unification polyurea protection coating
（1）The preparation method of component A：According to each parts by weight of raw materials described in the embodiment 2 of table 1, first isocyanates and polysulfide are modified
Epoxy resin is added in reactor, under 140r/min, 80 DEG C, insulation reaction 3h is at the uniform velocity heated with stirring to, to isocyano
After weight/mass percentage composition reaches 16%, 50 DEG C are cooled to, adds diluent, under 100r/min, stirred 50min, obtain component A；
（2）The preparation method of B component：According to each parts by weight of raw materials described in the embodiment 2 of table 1, first by some aliphatic biosynthesis block
After amine carbamide resin mixes with coloring pigment, filler, organic zinc, dispersant, anti-settling agent, defoamer and partial solvent,
Under 1000r/min, disperse 45min, be then ground with basket type sand mill to fineness≤17 μm, obtain slurry, then in the slurry
Add remaining aliphatic biosynthesis block amine carbamide resin and graphene slurry, UV absorbers, UV light stabilizing agent, levelling
Agent, flatting silica and remaining solvent, under 400r/min, mediation 65min, filtered with the silk of 200 mesh, obtain B component；
（3）By step（1）Gained component A and step（2）Gained B component is according to 1:3 volume ratio mixture,.
A kind of preparation method embodiment 3 of automobile chassis system-specific bottom surface unification polyurea protection coating
（1）The preparation method of component A：According to each parts by weight of raw materials described in the embodiment 3 of table 1, first isocyanates and polysulfide are modified
Epoxy resin is added in reactor, under 120r/min, 78 DEG C, insulation reaction 2h is at the uniform velocity heated with stirring to, to isocyano
After weight/mass percentage composition reaches 17.5%, 52 DEG C are cooled to, adds diluent, under 80r/min, stirred 60min, obtain A groups
Point；
（2）The preparation method of B component：According to each parts by weight of raw materials described in the embodiment 3 of table 1, first by some aliphatic biosynthesis block
After amine carbamide resin mixes with coloring pigment, filler, organic zinc, dispersant, anti-settling agent, defoamer and partial solvent,
Under 1200r/min, disperse 60min, be then ground with basket type sand mill to fineness≤20 μm, obtain slurry, then in the slurry
Add remaining aliphatic biosynthesis block amine carbamide resin and graphene slurry, UV absorbers, UV light stabilizing agent, levelling
Agent, flatting silica and remaining solvent, under 500r/min, mediation 80min, filtered with the silk of 200 mesh, obtain B component；
（3）By step（1）Gained component A and step（2）Gained B component is according to 1:4 volume ratio mixture,.
Polyurea protection coating and purchased in market in the prior art is unified into the gained automobile chassis system-specific bottom surface of embodiment 1~3
Epoxy acrylic bottom surface unification coating, pass through PROMIX 2KE bi-components electronics respectively and match flowmeter system and air and aid in
Spray gun, spray to automobile chassis vehicle frame（Base material is steel plate）, the coating thickness of the coating of embodiment 1~3 and coating purchased in market（Dry film）
It is 80 ± 5 μm.Automobile factory is to the technical requirement and embodiment 1~3 of product, the measured result of coating film performance purchased in market
As shown in table 2.
The gained automobile chassis system-specific bottom surface of 2 embodiment of table 1~3 unification polyurea protection coating,
Unification coating film performance measured result in epoxy acrylic bottom surface purchased in market
As shown in Table 2, compared with unification coating in epoxy acrylic bottom surface purchased in market, coating of the present invention has the coating of embodiment 1~3
Higher solid content, there is lower solvent and content of beary metal and lower VOC content, belong to environmentally friendly product；
Coating of the present invention also has the performances such as more preferable media-resistant, ageing-resistant, salt spray resistance and wet-heat resisting；Meanwhile coating tool of the present invention
There is shorter surface drying and do solid work the time, product, which is constructed, can improve the efficiency of construction of automobile factory's pipelining.
Three coating in the embodiment of the present invention 1~3 are subjected to model and vehicle frame spraying in automobile factory of three, China respectively
Construction, after model is placed under damp and hot marine environment exposure 12 months, there is not discoloration, loss of gloss, efflorescence and corrosion in film coated surface
The defects of；The vehicle frame of coating of the present invention is sprayed after use in 2 years, coating flat smooth, no significant defect.
Claims (8)
1. polyurea protection coating is unified in a kind of automobile chassis system-specific bottom surface, it is characterised in that：By component A and B component according to
1:2~4 volume ratio mixture forms：The component A includes isocyanates, polysulfide modified epoxy resin and diluent；The B groups
The fatty race's biosynthesis block amine carbamide resin of subpackage, coloring pigment, filler, graphene slurry, organic zinc, dispersant, ultraviolet light
Absorbent, UV light stabilizing agent, anti-settling agent, levelling agent, defoamer, flatting silica and solvent.
2. automobile chassis system-specific bottom surface unification polyurea protection coating according to claim 1, it is characterised in that described each
The parts by weight of raw material are：The component A includes 55~85 parts of isocyanates, 10~30 parts of polysulfide modified epoxy resin and diluent
5~15 parts；The B component includes 25~50 parts of aliphatic biosynthesis block amine carbamide resin, 3~20 parts of coloring pigment, filler 10
~35 parts, 5~15 parts of graphene slurry, 5~15 parts of organic zinc, 0.3~1.0 part of dispersant, UV absorbers 0.5~1.5
Part, 0.5~1.5 part of UV light stabilizing agent, 0.2~1.0 part of anti-settling agent, 0.2~1.0 part of levelling agent, 0.2~1.0 part of defoamer,
5~15 parts of 1~6 part of flatting silica and solvent.
3. polyurea protection coating is unified in automobile chassis system-specific bottom surface according to claim 1 or claim 2, it is characterised in that：A groups
In point, the isocyanates is hexamethylene diisocyanate trimer；The polysulfide modified epoxy resin is that Beijing day is permanent strong
Aliphatic poly sulphur modification the epoxy resin S15 or EPS25 of development in science and technology Co., Ltd；The diluent for dehydration dimethylbenzene and
Dehydration acetate N-butyl.
4. unifying polyurea protection coating according to one of claims 1 to 3 automobile chassis system-specific bottom surface, its feature exists
In：In B component, the aliphatic biosynthesis block amine carbamide resin is F420, F524 or the F520 for flying upward Chemical Manufacture, and Guangzhou is golden
In JH-8122, JH-8142 or JH-8152 of K8420, K8428 or K8520 of your Chemical Manufacture of platinum, Shanghai fine horse and Chemical Manufacture
One or more；The coloring pigment is high-carbon black pigment, rutile titanium dioxide, lemon Huang or one kind in phthalocyanine blue or several
Kind；The filler is the one or more in mica powder, talcum powder, kaolin or barium sulfate；The graphene slurry is by graphite
Alkene is with N- methylpyrrolidones with 10:60~90 quality forms than mixture；The organic zinc is the production of Guangxi Xin Jing companies
One or more in ZPN- I, ZPN- II or ZPN- III；The dispersant be Bi Ke companies production BYK-110, BYK-161,
One or more in BYK-163 or BYK-ATU；The UV absorbers are BASF 384-2, UV- is learned in Qidong gold beautification
1st, Tianjin profit pacifies the one or more in Longhua work 1130 or Taiwan double bond chemical industry CS5530；The UV light stabilizing agent is Bath
Husband 123, Qidong gold beautification learn the one or more in LS-292, Tianjin profit peace Longhua work 7292 or Taiwan double bond chemical industry CS292；
The anti-settling agent is Degussa R972；The levelling agent is polyether-modified dimethyl silicone polymer, acrylate interpolymer or fluorine
One or more in carbon polymer；The defoamer is modified polyorganosiloxane or organosilicon polymer；The flatting silica is refined
One or more in organic quenching powder M4, M5 or M6 of precious company's production；The solvent is dimethylbenzene, n-butyl acetate, third
One or more in glycol methyl ether acetate or ethyl acetate.
A kind of 5. preparation side of the unification of the automobile chassis system-specific bottom surface as described in one of Claims 1 to 4 polyurea protection coating
Method, it is characterised in that comprise the following steps：
（1）The preparation method of component A：First isocyanates and polysulfide modified epoxy resin are added in reactor, at the uniform velocity stirring adds
Heat, after the weight/mass percentage composition of insulation reaction to isocyano reaches 11~19%, cooling, diluent is added, is stirred,
Obtain component A；
（2）The preparation method of B component：First by some aliphatic biosynthesis block amine carbamide resin and coloring pigment, filler, organic
After zinc, dispersant, anti-settling agent, defoamer and partial solvent mixing, disperseed, be then ground into slurry with basket type sand mill,
Add remaining aliphatic biosynthesis block amine carbamide resin and graphene slurry, UV absorbers, ultraviolet light in the slurry again
Stabilizer, levelling agent, flatting silica and remaining solvent are reconciled, and filtering, obtain B component；
（3）By step（1）Gained component A and step（2）Gained B component is according to 1:2~4 volume ratio mixture,.
6. the preparation method of automobile chassis system-specific bottom surface unification polyurea protection coating according to claim 5, its feature
It is：Step（1）In, the speed at the uniform velocity stirred is 120~180r/min；The temperature of the heating is 80 ± 3 DEG C, described
The time of insulation reaction is 2~4h；It is described to be cooled to 50 ± 3 DEG C；The mixing speed added after diluent is 80~140 r/
Min, the time of stirring is 30~60min.
7. unifying the preparation method of polyurea protection coating according to the automobile chassis system-specific bottom surface of claim 5 or 6, it is special
Sign is：Step（2）In, the mass ratio of the aliphatic biosynthesis block amine carbamide resin successively added is 1:0.2~0.8, successively
The mass ratio of the solvent of addition is 1:0.2~1.0.
8. unify the preparation method of polyurea protection coating according to one of claim 5~7 automobile chassis system-specific bottom surface,
It is characterized in that：Step（2）In, the scattered speed is 800~1200 r/min, and the scattered time is 30~60min；Institute
State and be ground to fineness≤20 μm；The speed of the mediation is 300~500 r/min, and the time of mediation is 45~90min；With 100
The silk of~300 mesh is filtered.
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Denomination of invention: A special bottom integrated polyurea protective coating for automotive chassis systems and its preparation method Effective date of registration: 20230731 Granted publication date: 20200317 Pledgee: Agricultural Bank of China Limited Changsha Wangcheng District sub branch Pledgor: XIANGJIANG PAINT TECHNOLOGY CO.,LTD. Registration number: Y2023980050457 |