CN110054979A - A kind of aqueous coating for plastic and its preparation method and application - Google Patents
A kind of aqueous coating for plastic and its preparation method and application Download PDFInfo
- Publication number
- CN110054979A CN110054979A CN201810055466.XA CN201810055466A CN110054979A CN 110054979 A CN110054979 A CN 110054979A CN 201810055466 A CN201810055466 A CN 201810055466A CN 110054979 A CN110054979 A CN 110054979A
- Authority
- CN
- China
- Prior art keywords
- parts
- aqueous
- agent
- plastic
- paint film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- 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
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
-
- 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
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a kind of aqueous coating for plastic and its preparation method and application, the coating includes following component according to the mass fraction: 1-20 parts of 8-35 parts of 30-65 parts of aqueous polyester resin dispersion, deionized water, the pigments and fillers of alcoholic hydroxy, 0.1-1 parts of 2-8 parts of 10-20 parts of polyisocyanates, coalescing agent mixed solvent, the reinforcing agent of hydrophilic modifying and 1-2 parts of other auxiliary agents.The aqueous coating for plastic can form the fine and close paint film of reticular structure, and there are a large amount of urethano, urea groups and hydrogen bonds for paint film, to make paint film and frosting interlayer adhesive force, wear-resisting, resistant to liquid dielectric behavior is more preferable.The preparation method can effectively improve the aqueous polyester resin of alcoholic hydroxy and the polyisocyanates extent of reaction of hydrophilic modifying, promote the performance of coating paint film.The preparation method is simple, using deionized water as solvent, reduces the discharge of VOC, can be effectively improved the working environment of painting operation personnel, reduce environmental pollution, and can effectively facilitate environment and economic coordinated development.
Description
Technical field
The present invention relates to technical field of aqueous paint more particularly to a kind of aqueous coating for plastic and preparation method thereof and use
On the way.
Background technique
Paint for plastics refers to the coating for being coated on plastic material surface, and there is decoration, protection, specific function etc. to make
With, to improve plastic products weatherability and its application have great significance.Aqueous coating for plastic and plastics solvent type
Coating is compared, and has the discharge for reducing volatile organic matter (VOC), is reduced to advantages such as the pollutions of environment.But plastics water
Property coating is easily scratched, acid resistance and the defects of alkaline medium is poor and adhesive force is inadequate limit existing plastics with aqueous
The application of coating.Thus, the research and development of the plastics low-VOC aqueous coating of rub resistance and resistant to many liquid medium become research heat
Point, the attention by countries in the world.
At present aqueous coating for plastic mainly have Water-borne Acrylic Coating, waterborne epoxy coatings, aqueous polyurethane coating,
Aqueous polyurethane acrylate coating etc..Contain a large amount of ammonia ester bond in the paint film formed due to polyurethane coating, it is intermolecular
Hydrogen bond easy to form again, the formation and disconnection of hydrogen bond, so that polyurethane coating film has certain intensity and toughness, therefore it is not only
With excellent crocking resistance, also there is excellent resistant to liquid dielectric behavior, such as acidproof, alkaline-resisting, salt tolerant and water-fast property
Energy.Aqueous polyurethane coating has both the advantages of water paint and polyurethane coating, will obtain widely in plastic paint industry
Using.
Aqueous polyurethane coating is divided into single-component water-based polyurethane coating and double-component waterborne polyurethane coating, it is opposite and
Speech, the performance of double-component waterborne polyurethane coating is more preferably.Double-component waterborne polyurethane coating is by aqueous polyol resin and hydrophilic
Modified polyisocyanate curing agent mixes, and performance is mainly consolidated by aqueous polyol resin and hydrophilically modified polyisocyanates
Agent determines.And the diversity and adjustability of aqueous polyol resin can satisfy different plastics coating demands.Domestic application
In the aqueous polyurethane coatings of plastics, there are many reports, such as 106833360 A of CN to disclose a kind of water proof and wearable plastic cement and apply
Material and preparation method thereof, 105733390 A of CN disclose a kind of PP plastics aqueous double-component clear finish and preparation method thereof
A kind of water-borne plastic coatings and preparation method thereof etc. are disclosed with 104263230 A of CN.But there is presently no report simultaneously
Have both that wear-resisting, adhesive force is good and the aqueous polyurethane coated on frosting of resistant to liquid medium (acid, alkali, salt or organic solvent)
Coating.Therefore it prepares a kind of with excellent rub resistance, and has with the aqueous coating for plastic of good resistant to liquid medium
Realistic meaning.
Summary of the invention
In order to improve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of aqueous coating for plastic and its preparations
Method and purposes.The paint film that the coating preparation obtains good, rub resistance and resistant to many liquid medium performance with adhesive force.Institute
The crocking resistance for stating paint film excellent is to use the polyfunctionality polyester resin of good toughness for binder；The attachment of the paint film
Power and resistant to many liquid medium, which are had excellent performance, to be to use reinforcing agent and coalescing agent mixed solvent and controls its dosage and can mention
The internal crosslinking degree of high coating system, the open hour for extending coating film forming procedure simultaneously, to avoid because being painted caused by being crosslinked excessively
The surface defect of film for example pinprick, it is porous phenomena such as.
Object of the present invention is to what is be achieved through the following technical solutions:
A kind of aqueous coating for plastic comprising following component according to the mass fraction: the waterborne polyester tree of alcoholic hydroxy
30-65 parts of rouge dispersion, 8-35 parts of deionized water, 1-20 parts of pigments and fillers, 10-20 parts of the polyisocyanates of hydrophilic modifying, film forming
2-8 parts of auxiliary agent mixed solvent, 0.1-1 parts of reinforcing agent and 1-2 parts of other auxiliary agents.
Further, the water paint includes following component according to the mass fraction: the waterborne polyester of alcoholic hydroxy
40-65 parts of resin dispersion, 8-25 parts of deionized water, 5-20 parts of pigments and fillers, hydrophilic modifying 10-16 parts of polyisocyanates, at
5-8 parts of film auxiliary agent mixed solvent, 0.4-1 parts of reinforcing agent and 1-2 parts of other auxiliary agents.
In the present invention, the dosage of the polyisocyanates of hydrophilic modifying is 10-20 (quality) part, preferably 10-16 (quality)
Part；The increase of the polyisocyanates dosage of the hydrophilic modifying can improve the coating degree of cross linking, to enhance the attachment of coating paint film
Power and resistant to liquid dielectric behavior.
Further, the mass parts ratio of the polyisocyanates of the hydrophilic modifying and coalescing agent mixed solvent is (1.5
~2.5): 1, for example, 2:1.Select such range, can avoid the surface defect because of paint film caused by being crosslinked excessively, as pinprick,
Phenomena such as porous.
Further, the solid content of the aqueous polyester resin dispersion of the alcoholic hydroxy is 20-75wt%, and viscosity is
200-1000mPa.s hydroxyl value is 20-100mg KOH/g.
Further, the pigments and fillers include pigment and/or filler, and the pigment includes aqueous color paste；The filler is
Any coating filler known in the art, for example, titanium dioxide, calcium carbonate, montmorillonite, fumed silica, talcum
At least one of powder, bentonite.The aqueous color paste is used mainly as colorant, the filler such as titanium dioxide, carbonic acid
Calcium, montmorillonite, fumed silica, talcum powder, bentonite etc. mainly play thickening, reinforcement and filling.
Further, the aqueous color paste is water-based system mill base, for example, aqueous rust slurry, aqueous carbonarius
At least one of slurry, aqueous white slurry, aqueous bright red mill base, aqueous iron yellow pulp, aqueous phthalocyanine blue slurry.
Further, the aqueous color paste is using water as decentralized medium, and being optionally added into can promote pigment evenly dispersed
Pigment is dispersed into uniform lotion by auxiliary agent.
Further, the polyisocyanates of the hydrophilic modifying includes the aliphatic polyisocyante or hydrophilic of hydrophilic modifying
Modified aromatic polyisocyanate.
Further, the coalescing agent mixed solvent includes following component according to the mass fraction: propylene glycol monomethyl ether vinegar
1-5 parts of acid esters, 1-4 parts of dimethyl ether.
Further, the coalescing agent mixed solvent further includes following component according to the mass fraction: dipropylene glycol list
0-2 parts of methyl ether.
Further, the reinforcing agent is silica solution type reinforcing agent, can be increased by forming reticular structure in paint film
Its compactness improves hardness of paint film and resistant to liquid dielectric behavior.
Further, other described auxiliary agents include wetting agent (such as anionic surfactant type wetting agent), defoaming agent
(such as organic silicon type defoaming agent), levelling agent (such as polyether-modified dimethyl silicone polymer type levelling agent), thickener (such as are formed
Thickener) one of or at least two.
In the present invention, by the way that wetting agent is added, the wetting and dispersing between water-borne plastic coatings each component can be increased, keep it mixed
That closes is more uniform, improves the cohesive force of water-borne plastic coatings and ground.By the way that defoaming agent is added, it can be reduced water-borne plastic coatings
In foam, avoid occurring in coating application the defects of pin hole occur after shrinkage cavity, paint film are dry.By the way that levelling agent is added, so that
Water-borne plastic coatings form a smooth, smooth, uniform film during the drying and film forming process.By the way that thickener is added, adjust
The viscosity of coating meets different execution conditions.
Further, other described auxiliary agents include following component according to the mass fraction: 0.1-0.6 parts of wetting agent, defoaming
0.1-0.6 parts of agent, 0.2-1.2 parts of levelling agent, 0-0.5 parts of thickener.
Further, the water-borne plastic coatings are 23-40s by applying the viscosity that -4 agar diffusion methods are tested at 25 DEG C.
The present invention also provides the preparation methods of above-mentioned aqueous coating for plastic, and described method includes following steps:
By the mass fraction by the aqueous polyester resin dispersion of alcoholic hydroxy, deionized water, pigments and fillers, hydrophilic modifying
Polyisocyanates, reinforcing agent, coalescing agent mixed solvent and other auxiliary agents be uniformly mixed, the plastics are prepared with aqueous
Coating.
Further, described method includes following steps:
A) mass fraction is pressed by aqueous polyester resin dispersion, deionized water, pigments and fillers and the reinforcement of alcoholic hydroxy
Agent and optionally wetting agent and defoaming agent, are mixed evenly, and obtain component A；
B) polyisocyanates of hydrophilic modifying and coalescing agent mixed solvent are mixed equal by the mass fraction
It is even, obtain B component；
C) component A of step a) and the B component of step b) are mixed, obtains mixed system；Be optionally added into levelling agent and
Thickener；The aqueous coating for plastic is prepared.
The study found that the mode of step mixing can be taken when preparing the coating；It can also use alcoholic hydroxy
The polyisocyanates of aqueous polyester resin dispersion and hydrophilic modifying is first made into component A and B component respectively, then again mixes the two
The mode of conjunction.Latter approach is taken to have the advantage that molten when mixing the polyisocyanates of hydrophilic modifying with coalescing agent
After agent is first made into B component, the viscosity of the polyisocyanates of hydrophilic modifying can be reduced, then with the waterborne polyester including alcoholic hydroxy
The component A of resin dispersion mixes, and can be effectively facilitated its reacting with the aqueous polyester resin dispersion of hydroxyl.
Further, the rate of the stirring is 200-400r/min.
Further, it the method also includes the aqueous coating for plastic of step c) is crossed the filtering of 200 mesh screen cloths, is prepared into
To final aqueous coating for plastic.
The present invention also provides the purposes of above-mentioned aqueous coating for plastic, it is used to prepare paint film in frosting.
The present invention also provides a kind of composite materials, the paint film including plastic layer and positioned at least one surface of plastics
Layer, the paint film layer are coated by above-mentioned aqueous coating for plastic and are obtained.
Wherein, volatile organic matter (VOC) content in the paint film is less than 110g/L.
Further, the paint film and frosting interlayer have preferable adhesive force, wear-resisting, resistant to liquid dielectric behavior.
Further, the wear-resisting including but not limited to resistance to paper tape friction, resistance to rubber friction and ethanol-tolerant friction etc.；
The resistant to liquid medium is including but not limited to water-fast, organic solvent-resistant, acid and alkali-resistance and salt tolerant etc..
Further, the paint film meets at least one of following characteristics:
(1) resistance to paper tape friction 100 times or more；
(2) resistance to rubber friction is greater than 500 times or more；
(3) ethanol-tolerant friction 500 times or more；
(4) adhesive force reaches 0 grade standard；
(5) pencil hardness is not less than HB；
(6) resistant to liquid medium 50g/L H2SO4It aqueous solution, 50g/L KOH aqueous solution, 50g/L NaCl aqueous solution and goes
Ionized water more than 15 days after surface of the paint film there is no anomalous variation.
The anomalous variation includes but is not limited to that paint film dent occurs, blistering, cracking, removing, ruptures, falls off, show-through material
Or the defects of heterochromatic priming coat.
Beneficial effects of the present invention:
1. aqueous coating for plastic of the invention is using the polyisocyanates of hydrophilic modifying as curing agent, with alcoholic hydroxy
Aqueous polyester resin be cross-linked to form the fine and close paint film of reticular structure, there are a large amount of urethano, urea groups and hydrogen bonds for paint film, lead to
It crosses and improves the internal crosslinking degree of coating system in this way while extending the open hour of coating film forming procedure, to avoid because being crosslinked
Degree cause the surface defect of paint film for example pinprick, it is porous phenomena such as, to make paint film and frosting interlayer adhesive force, wear-resisting (resistance to
Paper tape friction, resistance to rubber friction, ethanol-tolerant friction), (water-fast, organic solvent-resistant (such as ethyl alcohol), acid and alkali-resistance is (such as resistant to liquid medium
H2SO4, KOH), salt tolerant (such as NaCl)) performance is more preferable.
2. having used the reinforcing agent and coalescing agent mixed solvent of certain dosage in aqueous coating for plastic of the invention, make
The adhesive force and resistant to many liquid medium for obtaining the paint film are had excellent performance.It essentially consists in molten using reinforcing agent and coalescing agent mixing
Agent simultaneously controls its dosage the internal crosslinking degree of coating system can be improved while extending the open hour of coating film forming procedure, with
Avoid because be crosslinked excessively caused by paint film surface defect for example pinprick, it is porous phenomena such as so that the adhesive force of the paint film and
Resistant to many liquid medium is had excellent performance.
3. volatile organic content is less than 110g/L in the paint film that aqueous coating for plastic of the invention is prepared,
Crocking resistance are as follows: resistance to paper tape rub 100 times above, resistance to rubber friction be greater than 500 times or more, ethanol-tolerant friction 500 times or more,
Adhesive force reaches 0 grade standard, pencil hardness is more than or equal to HB；Resistant to liquid medium such as 50g/L H2SO4Aqueous solution, 50g/L KOH water
Solution, 50g/L NaCl aqueous solution, deionized water are more than 15 days, and surface of the paint film does not have anomalous variation.
4. preparation method of the invention can effectively improve the aqueous polyester resin of alcoholic hydroxy and the polyisocyanate of hydrophilic modifying
Polyisocyanate reactant degree promotes the performance of coating paint film.The preparation method is simple, using deionized water as solvent, reduces VOC's
Discharge, can be effectively improved the working environment of painting operation personnel, reduce environmental pollution, and can effectively facilitate environment and economy
Coordinated development.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.Furthermore, it is to be understood that after having read content disclosed in this invention, ability
Field technique personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within protection defined by the present invention
Within the scope of.
Experimental method used in following embodiments is conventional method unless otherwise specified；Institute in following embodiments
Reagent, material etc., are commercially available unless otherwise specified.
Instrument and test:
The test method of the resistance to paper tape friction are as follows: loading 175g drags paper tape friction, and observation surface of the paint film damages journey
Degree, with specific reference to American Society Testing and Materials standard ASTM F2357-2010；
The test method of the resistance to rubber friction are as follows: use EF74 rubber, loading 500g friction, observation surface of the paint film damage
Hurt degree, with specific reference to American Society Testing and Materials standard ASTM D6279-2003 (2013)；
The test method of the ethanol-tolerant friction are as follows: the alcohol for the use of concentration being 95%, two layers of gauze loading 500g rub
It wipes, observes surface of the paint film degree of injury, " GB/T 23989-2009 coating solvent resistant wiping measures with specific reference to national standard
Method "；
The adhesive force uses hundred lattice methods of testing, with specific reference to national standard " GB/T9286-1998 paint and varnish paint
The scratch experiment of film "；
The test method of the pencil hardness are as follows: different pencil model weight bearing 500g draw forward 6.5mm in tip of a pencil,
Observe surface of the paint film degree of injury；
The test method of the resistant to liquid medium are as follows: paint film is coated on after plastic base be soaked in respectively it is different molten
In agent, the degree of injury of surface of the paint film is observed；
The above pencil hardness and resistant to liquid dielectric tests refer to national standard " aqueous polyurethane coating " HG/T 4761-
To the test of coating paint film of inorganic non-metallic surface in 2014.
In the present embodiment, the viscosity determining procedure of the coating are as follows: apply -4 agar diffusion methods and survey viscosity of the coating, coating is filled into viscosity
It is struck off on cup after cup with a metal or glass plate, extra test solution is scraped in flow cup edge groove, puts undertaking cup well.It will
Viscosity cup aperture is opened, and at room temperature, coating is allowed vertically to flow out, while starting stopwatch, and coating outflow is at lines, stop second when disconnection
Table, measuring the time represents its specific viscosity, and unit is the second.
Embodiment 1
The present embodiment provides a kind of water-borne plastic coatings, including following component as mass fraction: the water of alcoholic hydroxy
Property polyester resin (select alcoholic hydroxy aqueous polyester resin dispersion, solid content 40wt%, viscosity 1000mPa.s,
Hydroxyl value is 20mg KOH/g) 64 parts, 8 parts of deionized water, hydrophilic modifying 5 parts of 14 parts of aliphatic polyisocyante, iron oxide red mill base,
0.4 part of PCS-S6 reinforcing agent, 0.5 part of GE/M wetting agent, 0.5 part of BYK-028 defoaming agent, 0.6 part of BYK-333 levelling agent, the third two
5 parts of alcohol methyl ether acetate, 2 parts of dimethyl ether.
First the aqueous polyester resin of alcoholic hydroxy, deionized water, iron oxide red mill base, wetting agent, defoaming agent are mixed, stirring is equal
It is even.Again by the aliphatic polyisocyante of hydrophilic modifying, propylene glycol methyl ether acetate, dimethyl ether, stir evenly, so
The two is mixed afterwards, is eventually adding levelling agent.Purpose is to reduce the viscosity of the polyisocyanates of hydrophilic modifying, promotes it and contains hydroxyl
The reaction of the aqueous polyester resin dispersion of base.With mixing speed be 200-400r/min after mixing evenly, detect viscosity of the coating
For 25s, is filtered with 200 mesh screen cloths, water-borne plastic coatings are prepared.
Embodiment 2
The present embodiment provides a kind of water-borne plastic coatings and its preparation construction methods, including as mass fraction such as the following group
Point: the aqueous polyester resin of alcoholic hydroxy (select the aqueous polyester resin dispersion of alcoholic hydroxy, solid content 37wt%,
Viscosity is 1000mPa.s, and hydroxyl value is 60 parts of 20mg KOH/g), the aliphatic polyisocyante of 8 parts of deionized water, hydrophilic modifying
16 parts, 6 parts of carbon black color paste, 0.6 part of PCS-S6 reinforcing agent, 0.25 part of GE/M wetting agent, 0.25 part of BYK-028 defoaming agent, BYK-
333 0.5 part of levelling agents, 0.4 part of PS-166 thickener, 5 parts of propylene glycol methyl ether acetate, 3 parts of dimethyl ether.
First the aqueous polyester resin of alcoholic hydroxy, deionized water, carbon black color paste, wetting agent, defoaming agent are mixed, stirring is equal
It is even.The aliphatic polyisocyante of hydrophilic modifying, propylene glycol methyl ether acetate, dimethyl ether are stirred evenly again, so
The two is mixed afterwards, is eventually adding levelling agent and thickener.Purpose is to reduce the viscosity of the polyisocyanates of hydrophilic modifying, is promoted
It is reacted with the aqueous polyester resin dispersion of hydroxyl.With mixing speed be 200-400r/min after mixing evenly, detection
Viscosity of the coating is 35s, is filtered with 200 mesh screen cloths, water-borne plastic coatings are prepared.
Embodiment 3
The present embodiment provides a kind of water-borne plastic coatings, including following component as mass fraction: the water of alcoholic hydroxy
Property polyester resin (select alcoholic hydroxy aqueous polyester resin dispersion, solid content 37wt%, viscosity 1000mPa.s,
Hydroxyl value is 53 parts of 20mg KOH/g), 10 parts of aliphatic polyisocyante, the iron oxide red mill base 12 of 18 parts of deionized water, hydrophilic modifying
Part, 0.5 part of PCS-S6 reinforcing agent, 0.3 part of GE/M wetting agent, 0.3 part of BYK-028 defoaming agent, 0.8 part of BYK-333 levelling agent,
0.1 part of PS-166 thickener, 3.5 parts of propylene glycol methyl ether acetate, 1.5 parts of dimethyl ether.
First the aqueous polyester resin of alcoholic hydroxy, deionized water, iron oxide red mill base, wetting agent, thickener, defoaming agent are mixed
It closes, stirs evenly.The aliphatic polyisocyante of hydrophilic modifying, propylene glycol methyl ether acetate, dimethyl ether are stirred again
It mixes uniformly, then the two is mixed, is eventually adding levelling agent and thickener.Purpose is the polyisocyanates for reducing hydrophilic modifying
Viscosity promotes its reacting with the aqueous polyester resin dispersion of hydroxyl.It is that 200-400r/min stirring is equal with mixing speed
After even, detection viscosity of the coating is 23s, is filtered with 200 mesh screen cloths, water-borne plastic coatings are prepared.
Comparative example 1
This comparative example provides a kind of water-borne plastic coatings, including following component as mass fraction: the water of alcoholic hydroxy
Property polyester resin (select alcoholic hydroxy aqueous polyester resin dispersion, solid content 37wt%, viscosity 1000mPa.s,
Hydroxyl value is 54.1 parts of 20mg KOH/g), 13.5 parts of aliphatic polyisocyante, the iron oxide red of 16.2 parts of deionized water, hydrophilic modifying
8.4 parts of mill base, 0.3 part of GE/M wetting agent, 0.25 part of BYK-028 defoaming agent, 0.5 part of BYK-333 levelling agent, propylene glycol monomethyl ether vinegar
4 parts of acid esters, 2.75 parts of dimethyl ether.
First by the aqueous polyester resin of alcoholic hydroxy, deionized water, iron oxide red mill base, fumed silica, wetting agent, thickening
Agent, defoaming agent mixing, stir evenly.Again by the aliphatic polyisocyante of hydrophilic modifying, propylene glycol methyl ether acetate, dipropyl two
Diethylene glycol dimethyl ether stirs evenly, and then mixes the two, is eventually adding levelling agent.Purpose is the polyisocyanates for reducing hydrophilic modifying
Viscosity, promote its reacting with the aqueous polyester resin dispersion of hydroxyl.It is 200-400r/min stirring with mixing speed
After uniformly, detection viscosity of the coating is 16s, is filtered with 200 mesh screen cloths, water-borne plastic coatings are prepared.
Embodiment 4
The water-borne plastic coatings that embodiment 1-3 and comparative example 1 are prepared are coated in plastic sheet surface, specially use
The construction method of aerial spraying embodiment 1-3 coating is respectively coated in PC, ABS, ABS/PC plastic sheet surface, by comparative example 1
Coating is coated on PC plastic piece surface.It places in 60 DEG C of baking ovens, toasts 8h, obtain paint film, observe and to above-mentioned four kinds of plastic sheets
Surface film is tested for the property, and concrete outcome is referring to table 1- table 2.
The water-borne plastic coatings paint film antifriction scrape along adhesive force test data table of 1 embodiment 1-3 of table and comparative example 1
The water-borne plastic coatings resistant to liquid media data table of 2 embodiment 1-3 of table preparation
| 50g/L H2SO4 | 50g/L KOH | 50g/L NaCl | Deionized water | Paint film property | |
| Embodiment 1 | 15d | 15d | 30d | 15d | Surface of the paint film variation without exception |
| Embodiment 2 | 15d | 15d | 30d | 15d | Surface of the paint film variation without exception |
| Embodiment 3 | 15d | 15d | 30d | 15d | Surface of the paint film variation without exception |
The water-borne plastic coatings that comparing embodiment 1-3 and comparative example 1 are prepared, as can be seen from Table 1 and Table 2, this hair
The water-borne plastic coatings that bright embodiment 1-3 is prepared, volatile organic content are less than 110g/L, and various rub resistances are for example resistance to
Paper tape rub 100 times above, resistance to rubber friction be greater than 500 times or more, ethanol-tolerant friction 500 times or more, adhesive force reach 0 grade of mark
Quasi-, pencil hardness is more than or equal to HB；Resistant to liquid medium such as 50g/L H2SO4, 50g/L KOH, 50g/L NaCl, deionized water it is super
15 days are spent, surface of the paint film does not have anomalous variation, and the anomalous variation includes but is not limited to that paint film dent, blistering, cracking, stripping occurs
From, rupture, fall off, show-through material or the defects of heterochromatic priming coat.When paint film is constructed wet film reach 100 μm not sagging film forming it is good.
It show that the VOC of embodiment 1-3 is respectively 102g/L, 110g/L and 76g/L by VOC content calculation formula, greatly reduces
The discharge of coating VOC.Illustrate that water-borne plastic coatings that the present embodiment is prepared belong to a kind of rub resistance and resistant to liquid medium
The environmental type coating of low VOC.And the water-borne plastic coatings that comparative example 1 is prepared, due to being not added with thickener, coating is viscous
Spend less than normal, easy sagging when causing to construct；In addition, due to lacking reinforcing agent, so that three kinds of antifriction scrape along adhesion performances of paint film
Difference than embodiment 1-3.
More than, embodiments of the present invention are illustrated.But the present invention is not limited to above embodiment.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of aqueous coating for plastic comprising following component according to the mass fraction: the aqueous polyester resin of alcoholic hydroxy
30-65 parts of dispersion, 8-35 parts of deionized water, 1-20 parts of pigments and fillers, 10-20 parts of the polyisocyanates of hydrophilic modifying, film forming help
2-8 parts of agent mixed solvent, 0.1-1 parts of reinforcing agent and 1-2 parts of other auxiliary agents.
2. aqueous coating for plastic according to claim 1, which is characterized in that the water paint includes pressing mass parts
The following component of number meter: 8-25 parts of 40-65 parts of aqueous polyester resin dispersion, the deionized water of alcoholic hydroxy, pigments and fillers 5-20
Part, 0.4-1 parts of 5-8 parts of 10-16 parts of polyisocyanates, coalescing agent mixed solvent, the reinforcing agent and other auxiliary agents of hydrophilic modifying
1-2 parts.
3. aqueous coating for plastic according to claim 1 or 2, which is characterized in that the polyisocyanic acid of the hydrophilic modifying
The mass parts ratio of ester and coalescing agent mixed solvent is (1.5~2.5): 1, for example, 2:1.
Preferably, the solid content of the aqueous polyester resin dispersion of the alcoholic hydroxy is 20-75wt%, viscosity 200-
1000mPa.s, hydroxyl value are 20-100mg KOH/g.
Preferably, the coalescing agent mixed solvent includes following component according to the mass fraction: propylene glycol methyl ether acetate 1-5
Part, 1-4 parts of dimethyl ether.
Preferably, the coalescing agent mixed solvent further includes following component according to the mass fraction: dipropylene glycol monomethyl ether 0-2
Part.
Preferably, the pigments and fillers include pigment and/or filler, and the pigment includes aqueous color paste；The filler includes dioxy
Change at least one of titanium, calcium carbonate, montmorillonite, fumed silica, talcum powder, bentonite.
Preferably, the aqueous color paste includes aqueous rust slurry, aqueous carbon black color paste, aqueous white slurry, aqueous bright red mill base, water
Property iron oxide yellow mill base, at least one of aqueous phthalocyanine blue slurry.
4. aqueous coating for plastic according to claim 1-3, which is characterized in that the polyisocyanate of the hydrophilic modifying
Cyanate includes the aliphatic polyisocyante of hydrophilic modifying or the aromatic polyisocyanate of hydrophilic modifying.
5. aqueous coating for plastic according to claim 1-4, which is characterized in that the reinforcing agent is silica solution
Type reinforcing agent.
Preferably, other described auxiliary agents include that wetting agent (such as anionic surfactant type wetting agent), defoaming agent (such as have
Machine silicon type defoaming agent), levelling agent (such as polyether-modified dimethyl silicone polymer type levelling agent), thickener (such as association type increase
Thick dose) one of or at least two.
Preferably, other described auxiliary agents include following component according to the mass fraction: 0.1-0.6 parts of wetting agent, defoaming agent 0.1-
0.6 part, 0.2-1.2 parts of levelling agent, 0-0.5 parts of thickener.
Preferably, the water-borne plastic coatings are 23-40s by applying the viscosity that -4 agar diffusion methods are tested at 25 DEG C.
6. the preparation method of aqueous coating for plastic of any of claims 1-5, which is characterized in that the method packet
Include following steps:
By the mass fraction by the aqueous polyester resin dispersion of alcoholic hydroxy, deionized water, pigments and fillers, hydrophilic modifying it is more
Isocyanates, reinforcing agent, coalescing agent mixed solvent and other auxiliary agents are uniformly mixed, and the plastics are prepared with aqueous painting
Material.
7. preparation method according to claim 6, which is characterized in that described method includes following steps:
A) by the mass fraction by aqueous polyester resin dispersion, deionized water, pigments and fillers and the reinforcing agent of alcoholic hydroxy with
And optionally wetting agent and defoaming agent, it is mixed evenly, obtains component A；
B) polyisocyanates of hydrophilic modifying and coalescing agent mixed solvent are mixed evenly, are obtained by the mass fraction
To B component；
C) component A of step a) and the B component of step b) are mixed, obtains mixed system；It is optionally added into levelling agent and thickening
Agent；The aqueous coating for plastic is prepared.
Preferably, the rate of the stirring is 200-400r/min.
Preferably, it the method also includes the aqueous coating for plastic of step c) is crossed the filtering of 200 mesh screen cloths, is prepared final
Aqueous coating for plastic.
8. the purposes of aqueous coating for plastic of any of claims 1-5 is used to prepare paint film in frosting.
9. a kind of composite material, which is characterized in that the composite material include plastic layer and be located at least one table of the plastics
The paint film layer in face, the paint film layer are coated by aqueous coating for plastic of any of claims 1-5 and are obtained.
10. purposes according to claim 8 or composite material as claimed in claim 9, which is characterized in that in the paint film
Volatile organic content be less than 110g/L.
Preferably, the paint film and frosting interlayer have preferable adhesive force, wear-resisting, resistant to liquid dielectric behavior.
Preferably, the wear-resisting including but not limited to resistance to paper tape friction, resistance to rubber friction, ethanol-tolerant friction；The resistance to liquid
Body medium is including but not limited to water-fast, organic solvent-resistant, acid and alkali-resistance, salt tolerant.
Preferably, the paint film meets at least one of following characteristics:
(1) resistance to paper tape friction 100 times or more；
(2) resistance to rubber friction is greater than 500 times or more；
(3) ethanol-tolerant friction 500 times or more；
(4) adhesive force reaches 0 grade standard；
(5) pencil hardness is not less than HB；
(6) resistant to liquid medium 50g/L H2SO4Aqueous solution, 50g/L KOH aqueous solution, 50g/L NaCl aqueous solution and deionization
Water more than 15 days after surface of the paint film there is no anomalous variation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055466.XA CN110054979A (en) | 2018-01-19 | 2018-01-19 | A kind of aqueous coating for plastic and its preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055466.XA CN110054979A (en) | 2018-01-19 | 2018-01-19 | A kind of aqueous coating for plastic and its preparation method and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110054979A true CN110054979A (en) | 2019-07-26 |
Family
ID=67315265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810055466.XA Pending CN110054979A (en) | 2018-01-19 | 2018-01-19 | A kind of aqueous coating for plastic and its preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110054979A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793990A (en) * | 2020-07-14 | 2020-10-20 | 安徽菱湖漆股份有限公司 | Water-based self-adhesive decorative cloth coating and preparation method thereof |
| CN115820094A (en) * | 2022-08-08 | 2023-03-21 | 山东奔腾漆业股份有限公司 | Waterborne polyurethane coating and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845217A (en) * | 2010-05-11 | 2010-09-29 | 陕西科技大学 | Preparation method of water-based polyurethane/nano-silicon dioxide composite emulsion |
| CN101935493A (en) * | 2010-09-28 | 2011-01-05 | 江苏冶建防腐材料有限公司 | Water-based innocuous long-acting antifouling coating and preparation method thereof |
| CN104321395A (en) * | 2012-04-03 | 2015-01-28 | 关西涂料株式会社 | Aqueous paint composition and method for forming coating |
| CN105504905A (en) * | 2016-02-03 | 2016-04-20 | 广州希森美克新材料科技有限公司 | Highly wear-resistant transparent coating for metal surface |
| CN107418277A (en) * | 2017-07-17 | 2017-12-01 | 广东绿色大地化工有限公司 | A kind of water nano long-effective corrosion finish paint and preparation method thereof |
-
2018
- 2018-01-19 CN CN201810055466.XA patent/CN110054979A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845217A (en) * | 2010-05-11 | 2010-09-29 | 陕西科技大学 | Preparation method of water-based polyurethane/nano-silicon dioxide composite emulsion |
| CN101935493A (en) * | 2010-09-28 | 2011-01-05 | 江苏冶建防腐材料有限公司 | Water-based innocuous long-acting antifouling coating and preparation method thereof |
| CN104321395A (en) * | 2012-04-03 | 2015-01-28 | 关西涂料株式会社 | Aqueous paint composition and method for forming coating |
| CN105504905A (en) * | 2016-02-03 | 2016-04-20 | 广州希森美克新材料科技有限公司 | Highly wear-resistant transparent coating for metal surface |
| CN107418277A (en) * | 2017-07-17 | 2017-12-01 | 广东绿色大地化工有限公司 | A kind of water nano long-effective corrosion finish paint and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111793990A (en) * | 2020-07-14 | 2020-10-20 | 安徽菱湖漆股份有限公司 | Water-based self-adhesive decorative cloth coating and preparation method thereof |
| CN115820094A (en) * | 2022-08-08 | 2023-03-21 | 山东奔腾漆业股份有限公司 | Waterborne polyurethane coating and preparation method thereof |
| CN115820094B (en) * | 2022-08-08 | 2023-08-18 | 山东奔腾漆业股份有限公司 | Water-based polyurethane coating and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106398503B (en) | A kind of aqueous double-component polyurethane topcoat paint and preparation method thereof | |
| CN109054519A (en) | A kind of water soluble acrylic acid anticorrosive paint and preparation method thereof containing pitch | |
| CN107099238A (en) | Coating composition and its preparation method and application is applied in a kind of aqueous automobile | |
| CN107163812B (en) | A kind of extra-weather-proof corrosion-resistant engineering machinery finishing coat of low VOC and preparation method | |
| CN107523143A (en) | A kind of general no fat mill base of water nano and preparation method thereof | |
| CN104449241B (en) | A kind of aviation aircraft coating system | |
| CN109679479A (en) | A kind of environment-friendly water-based varnish of high durable acid and alkali-resistance and preparation method thereof | |
| CN106800874A (en) | A kind of aqueous two-component polyurethane finish paint and preparation method thereof | |
| CN107057545A (en) | Applied in aqueous dual-component acroleic acid polyurethane and preparation method thereof | |
| CN109468029A (en) | A kind of aqueous coil steel coating finishing coat and preparation method thereof | |
| US11634643B2 (en) | Wetting and anti-foaming agent | |
| CN108976371A (en) | A kind of high-performance sulfonic acid type water-based polyurethane curing agent and the preparation method and application thereof | |
| CN109439168A (en) | A kind of water high light pool two-component polyurethane aluminium paint and preparation method thereof | |
| CN107936814A (en) | The net taste woodcare paint of high hardness polyurethane that a kind of POSS is modified | |
| CN108276890A (en) | A kind of aqueous automobile floating coating composition and preparation method thereof | |
| CN107474677A (en) | A kind of high-solid lower-viscosity bumper varnish, preparation method and its application method | |
| CN109207047A (en) | Dedicated super sub- skin sense abrasion-resistance water coating of a kind of PVC surface decoration and preparation method thereof | |
| CN110054979A (en) | A kind of aqueous coating for plastic and its preparation method and application | |
| CN101519547B (en) | Aqueous double-component atomic ash and application thereof | |
| CN109689808A (en) | Water base sealant with exceptional durability | |
| CN106833313A (en) | Water alcohol acid exterior wall sealing wax and preparation method thereof | |
| CN110358389A (en) | Floating coating containing sand and preparation method thereof | |
| CN109535973A (en) | Double-component waterborne polyurethane coating composition with thixotropic flow behavior and preparation method thereof | |
| CN101302395A (en) | Water-soluble polyurethane surface enamel | |
| CN110305561B (en) | Anticorrosive water-based leaf vein texture effect paint and preparation method and construction method thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190726 |