CN108977028A - A kind of aqueous transfer laser coating and preparation method thereof - Google Patents
A kind of aqueous transfer laser coating and preparation method thereof Download PDFInfo
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- CN108977028A CN108977028A CN201810753155.0A CN201810753155A CN108977028A CN 108977028 A CN108977028 A CN 108977028A CN 201810753155 A CN201810753155 A CN 201810753155A CN 108977028 A CN108977028 A CN 108977028A
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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
- C09D175/04—Polyurethanes
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- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- 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
- C08G18/4202—Two or more polyesters of different physical or chemical nature
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- 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
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
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- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
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- 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
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
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Abstract
The invention belongs to transfer coatings technical fields, and in particular to a kind of aqueous transfer laser coating and preparation method thereof.Aqueous transfer laser coating includes following components and parts by weight content: stereochemical structure waterborne polyurethane resin 30%-60%, water-based acrylic resin 20%-30%, deionized water 10-50%, coalescing agent 1-3%, function additive 0-1%.Production for aqueous transfer laser coating, is realized by following steps, the preparation of step 1, stereochemical structure presoma；The preparation of step 2, base polyurethane prepolymer for use as；The preparation of step 3, stereochemical structure waterborne polyurethane resin；The preparation of step 4, aqueous transfer laser coating；Step 5 eliminates foam through filtering and impurity removing, and detection adjustment aqueous transfer laser viscosity of the coating to satisfaction uses on the machine requirement and obtains finished product.The present invention is reasonably combined by resin, and coating is enable to have excellent coating performance, heat resistance, moldable performance and printing adaptability, provides brand-new solution for the green, safe and environment-friendly of transfer laser coating.
Description
Technical field
The invention belongs to transfer coatings technical fields, and in particular to a kind of aqueous transfer laser coating and preparation method thereof.
Background technique
Laser paper with the color effect of its riot of color, noble beautiful metal-like, reliable and stable antifalsification and
Degradable, recyclable environmental-protecting performance is obtained above in various high-grade packagings and is widely used.The production technology master of usual laser paper
There is following two: direct method and transfer method.Direct method is higher to raw material and equipment requirement and the high more difficult reality of quantitative paper
It is existing；Laser information is transferred to paper as medium using film by transfer method, due to being turned using the good film of flatness
It moves, has the advantages that not limited quantitatively by body paper, picture and text laser effect designs diversification.
Coating used in transfer method is mainly solvent-based system at present, is coated on basement membrane using print roll coating mode, through height
Warm dry solidification forms a film, and there are problems in use process: environmental-protecting performance is poor, and safety is bad.Therefore with scientific skill
The progress of art and the enhancing of people's environmental consciousness, solvent based coating is just gradually replaced emerging water paint.Patent
CN101768398A discloses a kind of water-based temperature resistant single-coating transfer laser coating and preparation method thereof, and water-base resin selects third
Olefin(e) acid lotion, polyvinyl alcohol, aqueous chlorine vinegar, dispersions of polyurethanes, acrylic acid modified polyurethane lotion, plant oil modified polyurethane
Or one or more of water dispersion nitrocotton.Water-based temperature resistant resin is that aqueous aldehyde ketone resin or polycarbonate polyurethane disperse
Body.The coating has the advantages that environmental protection, high temperature resistant, printability are good.Patent CN101701117A discloses one kind can laser molding
Alcohol-soluble transfer coatings and preparation method thereof include cellulose esters and acrylic resin, and main solvent uses alcohols, in use process
The harm to human body is reduced, coating has good water resistance, solvent resistance, temperature tolerance.Patent CN102719185A is disclosed
A kind of aqueous polyurethane transfer coatings of no benzene and preparation method thereof, resin use aqueous poly- without benzene and benzene homologue
Urethane.Product stability is improved, is generated in film forming procedure without benzene and benzene homologue, meets national VOC examination criteria.Patent
CN105295692A discloses a kind of Vacuum Deposition medium with water transfer laser coating and preparation method thereof, main comprising with the following group
Point: aqueous polyurethane, aqueous acrylic modified polyurethane resin, aqueous vinyl chloride-vinyl acetate resin.It is reasonably combined by resin, solve Jie
Matter fastness problem.
In the above patent to the component selection and formula composition of aqueous transfer laser coating in terms of done more research
And improve, but do not furtherd investigate in the molecular structure of Primary resins and characteristic application aspect, it is another by actual test discovery
It states coating and is occurring the problems such as levelling is bad, adhesion strength is insufficient, version or scumming are glued in molding, radium-shine brightness is not high in application,
Therefore aqueous transfer laser coating fails to obtain batch application at present.
Summary of the invention
For the problems of the prior art, the present invention provides a kind of aqueous transfer laser coating and preparation method thereof, uses
Stereochemical structure water-base resin substitutes conventional linear structure water-base resin, by the reasonably combined of resin, coating is made to have excellent painting
Cloth performance, heat resistance, moldable performance and printing adaptability energy, green, safe and environment-friendly for transfer laser coating provide entirely
New solution.
To achieve the above object, the present invention is achieved by the following technical solutions:
The present invention provides a kind of aqueous transfer laser coating, is characterized in that including following components and parts by weight content: vertical
Body structure waterborne polyurethane resin 30%-60%, water-based acrylic resin 20%-30%, deionized water 10-50%, coalescing agent 1-
3%, function additive 0-1%.
The stereochemical structure waterborne polyurethane resin is to be reacted to be made with polyurethane prepolymer by stereochemical structure presoma.
The stereochemical structure presoma is made by branched polyester and anhydride reaction.
Preferably, the branched polyester is AB2Type branched polyester, preferably Boltorn H20, Boltorn H30,
It is at least one kind of in Boltorn H40.
Preferably, the acid anhydrides be organic acid anhydride, preferably acetic anhydride, propionic andydride, succinic anhydride, maleic anhydride,
It is at least one kind of in benzoyl oxide, phthalic enhydride.
The polyurethane prepolymer is to be reacted to be made with polyisocyanates by polyester polyol.
Preferably, the polyester polyol, preferably polyethylene glycol adipate glycol, poly adipate succinic acid ester two
It is at least one kind of in alcohol, polydiethylene glycol adipate glycol.
Preferably, the polyisocyanates, preferably toluene di-isocyanate(TDI), isophorone diisocyanate, six methylenes
1 kind in group diisocyanate.
The waterborne acrylic paint, preferably methyl methacrylate, styrene, ethyl acrylate, metering system
The copolymer of the sour two or more monomers of hydroxyl ethyl ester.
The coalescing agent, including levelling agent, defoaming agent, the defoaming agent is polyether modified siloxane class defoaming agent, excellent
It is selected as Digao Foamex805N, Foamex810；The levelling agent is Organo-modified type siloxane, band active group acrylic acid
The one or more of esters levelling agent.
The function additive, including scratch resistance auxiliary agent, antiblock additive, the scratch resistance auxiliary agent are silica dioxide nano particle
Molecular dispersion；The antiblock additive is one of high molecular weight dimethyl silicone polymer class or polyethylene wax class.
The preparation method of above-mentioned aqueous transfer laser coating provided by the invention is characterized in that and ties including solid
The preparation of structure waterborne polyurethane resin and the preparation of aqueous transfer laser coating；
The preparation method of stereochemical structure waterborne polyurethane resin, follows the steps below:
Step 1: the preparation of stereochemical structure presoma:
Branched polyester, solvent one are added sequentially in reaction vessel by step 11 first, and both control weight ratio is 1:1-3, are added
Temperature control is simultaneously completely dissolved by heat at 60-80 DEG C to branched polyester；
Step 12,1-4 times of amount of the acid anhydrides that branched polyester substance is added, and temperature is controlled at 100-120 DEG C, in nitrogen protection
And reaction 2-4h is modified under reflux state；
In a step 11, the solvent one is organic reaction common solvent, and type is excellent to known to those skilled in the art
It is selected as acetone, dimethylformamide, dimethyl sulfoxide, dioxane, at least one kind of in tetrahydrofuran；
Step 2: the preparation of base polyurethane prepolymer for use as follows the steps below:
Polyester polyol is added in reaction vessel heating stirring and melts by step 21, and by temperature control 90-100 DEG C, it is true
1-2h is dehydrated under reciprocal of duty cycle 50-90Kpa state；
Step 22 is cooled to 60-70 DEG C and is slowly added to polyisocyanates, catalyst, heats and simultaneously controls temperature at 80-90 DEG C,
Polymerization reaction 2-4h is carried out under nitrogen protection state, manufacturing process adds solvent two according to response situation and adjusts viscosity；
The proportion of the pure and mild polyisocyanates of polyester polyols indicates that R value is controlled in 2-5 with R value (molar ratio of-NCO/-OH):
1；
The catalyst is synthetic reaction custom catalysts, and type is to known to those skilled in the art, preferably February
One of dilaurylate, stannous octoate, anhydrous stannous chloride, dosage are the 0.01%-0.05% of system；
The type of the solvent two is to known to those skilled in the art, and preferably acetone, dimethylformamide, dimethyl are sub-
Sulfone, dioxane, at least one kind of in tetrahydrofuran, dosage is the 30- of the pure and mild polyisocyanates total weight of polyester polyols
100%；
Step 3: the resulting base polyurethane prepolymer for use as of step 2 preparation of stereochemical structure waterborne polyurethane resin: being cooled to 40-60
DEG C, it is then slowly added into the resulting stereochemical structure presoma of step 1, insulation reaction 2-4h is eventually adding neutralizer, reacts 20-
40min, re-evaporation remove solvent, and deionized water is added and emulsifies to obtain stereochemical structure waterborne polyurethane resin.
The neutralizer is common amine neutralizer, and type is to known to those skilled in the art, preferably two
1 kind in ethanol amine, triethanolamine；
The preparation method of aqueous transfer laser coating, follows the steps below:
Step 1: by the stereochemical structure waterborne polyurethane resin of above-mentioned preparation, water-based acrylic resin, deionized water by weight hundred
Divide ratio to be added sequentially in reaction vessel, control mixing speed 200-500rpm, stirs 5-10min；
Step 2: coalescing agent, function additive being added sequentially in reaction vessel by weight percentage, control mixing speed
800-1000rpm stirs 20-30min；
Step 3: eliminating foam through filtering and impurity removing and obtain aqueous transfer laser coating finished product.
Compared with prior art, the invention has the following advantages that
(1), traditional linear structure polyurethane tree is substituted using stereochemical structure polyurethane, can promote the heat resistance, resistance to of coating
Aqueous energy, solvent resistance, Coating combination fastness and printing adaptability.
(2), using stereochemical structure polyurethane as basic resin, water-based acrylic resin is real as property regulation resin
Existing aqueous transfer laser coating obtains good molding effect in wider temperature range.
(3), using aqueous transfer laser paint replacement solvent based coating, usual solvents type coating solids < 20%, remaining
For organic solvent, and water paint solid content > 25%, remaining is water, therefore can significantly reduce material cost and solvent discharge, section
About resource, environmentally protective.
(4), using aqueous transfer laser paint replacement solvent based coating, it can effectively avoid solvent based coating in film coated
When easily cause fire danger, it can be achieved that safe and efficient, green production process.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, this aqueous turn is combined by following embodiment
The preparation method for moving radium-shine coating illustrates the concrete composition of the aqueous transfer laser coating.
Embodiment 1
Branched polyester Boltorn H20, maleic anhydride, polyethylene glycol adipate glycol, toluene are selected in the present embodiment
Diisocyanate, acetone, dioxane, triethanolamine prepare stereochemical structure waterborne polyurethane resin, then with water soluble acrylic acid
Resin, deionized water, coalescing agent, function additive compound to obtain aqueous transfer laser coating.
Preparation about stereochemical structure waterborne polyurethane resin:
Step 1: the preparation of stereochemical structure presoma: being burnt in the 100mL round bottom equipped with thermometer, reflux condensing tube and water segregator
In bottle, 17.5g branched polyester Boltorn H20,8.5g acetone is added, it is equal to be warming up to 60 DEG C of stirring and dissolvings for 9.0g dioxane
It is even, 9.8g maleic anhydride is then added to being completely dissolved, heats up and controls temperature at 100 DEG C, in nitrogen protection and return
It is modified reaction 2h under stream mode and obtains stereochemical structure presoma；
Step 2: the preparation of base polyurethane prepolymer for use as: in another 1000mL round bottom equipped with thermometer, reflux condensing tube and water segregator
In flask, 200.0g polyethylene glycol adipate glycol is added, heat and melts temperature control in 90 DEG C of stirrings, in vacuum degree
2h is dehydrated under 50Kpa state；Then 60 DEG C are cooled to and is slowly added to 35.0g toluene di-isocyanate(TDI) and 0.02g tin dilaurate two
Butyl tin heats after adding and controls temperature at 80 DEG C, polymerization reaction 2h carried out under nitrogen protection state, process gradually adds
71.0g acetone solvent is added to adjust viscosity；
Step 3: the preparation of stereochemical structure waterborne polyurethane resin: the resulting base polyurethane prepolymer for use as of step 2 being cooled to 40 DEG C, so
After be slowly added to the resulting stereochemical structure presoma of step 1, then neutralizer triethanolamine, reaction is added in insulation reaction 2h
20min, re-evaporation remove solvent, are eventually adding deionized water and emulsify to obtain stereochemical structure waterborne polyurethane resin.
Preparation about aqueous transfer laser coating:
First by 50 parts of stereochemical structure waterborne polyurethane resins, 20 parts of water-based acrylic resins, 27 parts of deionized waters by weight hundred
Divide ratio to be added sequentially in reaction vessel, control mixing speed 200rpm, stirs 5min；: and then by 2.0 parts of levelling agents, 0.3 part
Defoaming agent, 0.3 part of scratch resistance auxiliary agent, 0.4 part of antiblock additive are added sequentially in reaction vessel, control mixing speed
800rpm stirs 20min；Finally through filtering and impurity removing, adjustment viscosity of the coating to satisfaction uses on the machine requirement and obtains embodiment product
1, performance is shown in Table 1.
Embodiment 2:
Branched polyester Boltorn H30, acetic anhydride, polybutylene glyool adipate, isophorone two are selected in the present embodiment
Isocyanates, acetone, dimethylformamide, diethanol amine prepare stereochemical structure waterborne polyurethane resin, then with aqueous acrylamide
Acid resin, deionized water, coalescing agent, function additive compound to obtain aqueous transfer laser coating.
The preparation of stereochemical structure waterborne polyurethane resin:
Step 1: the preparation of stereochemical structure presoma: being burnt in the 300mL round bottom equipped with thermometer, reflux condensing tube and water segregator
In bottle, 36.0g branched polyester Boltorn H30,36.0g acetone is added, 18.0g dimethylformamide is warming up to 70 DEG C of stirrings
It is uniformly dissolved, 20.4g acetic anhydride is then added to being completely dissolved, heat up and control temperature at 100 DEG C, in nitrogen protection and return
It is modified reaction 3h under stream mode and obtains stereochemical structure presoma；
Step 2: the preparation of base polyurethane prepolymer for use as: in another 1000mL round bottom equipped with thermometer, reflux condensing tube and water segregator
In flask, 200.0g polybutylene glyool adipate is added, heat and melts temperature control in 100 DEG C of stirrings, in vacuum
2h is dehydrated under degree 70Kpa state；Then 60 DEG C are cooled to and is slowly added to 66.6g isophorone diisocyanate and 0.05g is anhydrous
Stannous chloride heats after adding and controls temperature at 90 DEG C, polymerization reaction 3h carried out under nitrogen protection state, process is gradually
It adds 123.0g acetone solvent and adjusts viscosity；
Step 3: the preparation of stereochemical structure waterborne polyurethane resin: the resulting base polyurethane prepolymer for use as of step 2 being cooled to 50 DEG C, so
After be slowly added to the resulting stereochemical structure presoma of step 1, then neutralizer diethanol amine, reaction is added in insulation reaction 3h
30min, re-evaporation remove solvent, are eventually adding deionized water and emulsify to obtain stereochemical structure waterborne polyurethane resin.
The preparation of aqueous transfer laser coating:
First by 40 parts of stereochemical structure waterborne polyurethane resins, 20 parts of water-based acrylic resins, 37 parts of deionized waters by weight hundred
Divide ratio to be added sequentially in reaction vessel, control mixing speed 400rpm, stirs 10min；: and then by 2.0 parts of levelling agents, 0.5
Part defoaming agent, 0.3 part of scratch resistance auxiliary agent, 0.2 part of antiblock additive are added sequentially in reaction vessel, control mixing speed
900rpm stirs 30min；Finally through filtering and impurity removing, adjustment viscosity of the coating to satisfaction uses on the machine requirement and obtains embodiment product
2, performance is shown in Table 1.
Embodiment 3:
Branched polyester Boltorn H40, phthalic enhydride, polydiethylene glycol adipate glycol, six are selected in the present embodiment
Methylene diisocyanate, acetone, dimethyl sulfoxide, triethanolamine prepare stereochemical structure waterborne polyurethane resin, then with water
Property acrylic resin, deionized water, coalescing agent, function additive compound to obtain aqueous transfer laser coating；
The preparation of stereochemical structure waterborne polyurethane resin:
Step 1: the preparation of stereochemical structure presoma: being burnt in the 300mL round bottom equipped with thermometer, reflux condensing tube and water segregator
In bottle, 70.0g branched polyester Boltorn H40,35.0g acetone is added, it is molten to be warming up to 80 DEG C of stirrings for 35.0g dimethyl sulfoxide
Solution uniformly, is then added 44.5g phthalic enhydride to being completely dissolved, heats up and control temperature at 120 DEG C, in nitrogen protection
And it is modified reaction 4h under reflux state and obtains stereochemical structure presoma；
Step 2: the preparation of base polyurethane prepolymer for use as: in another 1000mL round bottom equipped with thermometer, reflux condensing tube and water segregator
In flask, 250.0g polydiethylene glycol adipate glycol is added, heat and melts temperature control in 100 DEG C of stirrings, true
2h is dehydrated under reciprocal of duty cycle 90Kpa state；Then 70 DEG C are cooled to and is slowly added to 84.0g hexamethylene diisocyanate and 0.1g octanoic acid
Stannous heats after adding and controls temperature at 90 DEG C, polymerization reaction 4h carried out under nitrogen protection state, process is gradually added
180g acetone solvent adjusts viscosity；
Step 3: the preparation of stereochemical structure waterborne polyurethane resin: the resulting base polyurethane prepolymer for use as of step 2 being cooled to 60 DEG C, so
After be slowly added to the resulting stereochemical structure presoma of step 1, then neutralizer triethanolamine, reaction is added in insulation reaction 4h
40min, re-evaporation remove solvent, are eventually adding deionized water and emulsify to obtain stereochemical structure waterborne polyurethane resin.
The preparation of aqueous transfer laser coating:
First by weight by 30 parts of stereochemical structure waterborne polyurethane resins, 20 parts of water-based acrylic resins, 47.5 parts of deionized waters
Percentage is added sequentially in reaction vessel, controls mixing speed 500rpm, stirs 10min；: and then by 1.8 parts of levelling agents,
0.3 part of defoaming agent, 0.2 part of scratch resistance auxiliary agent, 0.2 part of antiblock additive are added sequentially in reaction vessel, control mixing speed
1000rpm stirs 30min；Finally through filtering and impurity removing, adjustment viscosity of the coating to satisfaction uses on the machine requirement and obtains embodiment product
3, performance is shown in Table 1.
Table 1:
| Project | Solvent based coating | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Solid content % | < 20% | ≥35% | ≥30 | ≥25 |
| Molding temperature range | 130-150 | 170~190℃ | 160-180 | 150-170 |
| Temperature tolerance DEG C | 120 | 170 | 180 | 150 |
| Surface tension | ≥40dyn | ≥38dyn | ≥42dyn | ≥44dyn |
| Coating adhesion | ≥98% | ≥98% | ≥98% | ≥98% |
| Organic solvent emission | Have | Nothing | Nothing | Nothing |
| Security performance | Difference | It is excellent | It is excellent | It is excellent |
| Coating speed (m/min) | 120 | 300 | 300 | 300 |
It can see by the data in the above table 1, traditional 3 groups of water paints of solvent based coating and the application selected to carry out
Effect compares: the water paint heat resistance of the application is obviously improved, and wherein 2 heatproof of embodiment is up to 180 degree；The water of the application
Property coating can realize the zero-emission of organic solvent in use；The water paint of the application can realize high-speed coating, coating
Process safety performance is excellent.
Protection scope of the present invention is not limited to above embodiments, all water identical or equivalent with inventive technique scheme
The preparation method of property transfer laser coating, all belongs to the scope of protection of the present invention.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment includes
One independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should incite somebody to action
As a whole, the technical solutions in the various embodiments may also be suitably combined for specification, and forming those skilled in the art can
With the other embodiments of understanding.
Claims (10)
1. a kind of aqueous transfer laser coating, it is characterised in that: including following components and parts by weight content: stereochemical structure is aqueous poly-
Urethane resin 30%-60%, water-based acrylic resin 20%-30%, deionized water 10-50%, coalescing agent 1-3%, function additive 0-
1%。
2. a kind of aqueous transfer laser coating according to claim 1, it is characterised in that: the stereochemical structure aqueous polyurethane
Resin is to be reacted to be made with polyurethane prepolymer by stereochemical structure presoma.
3. a kind of aqueous transfer laser coating according to claim 2, it is characterised in that: the stereochemical structure presoma be by
Branched polyester and anhydride reaction are made.
4. a kind of aqueous transfer laser coating according to claim 3, it is characterised in that: the branched polyester is AB2Type branching
Polyester is at least one of Boltorn H20, Boltorn H30, Boltorn H40；
And/or the acid anhydrides be organic acid anhydride, be acetic anhydride, propionic andydride, succinic anhydride, maleic anhydride, benzoyl oxide,
At least one of phthalic enhydride.
5. a kind of aqueous transfer laser coating according to claim 2, it is characterised in that: the polyurethane prepolymer is by gathering
Ester polyol is reacted with polyisocyanates to be made.
6. a kind of aqueous transfer laser coating according to claim 5, it is characterised in that: the polyester polyol is to gather oneself two
At least one of sour glycol ester glycol, polybutylene glyool adipate, polydiethylene glycol adipate glycol；
And/or the polyisocyanates is toluene di-isocyanate(TDI), isophorone diisocyanate, hexa-methylene diisocyanate
One of ester.
7. a kind of aqueous transfer laser coating according to claim 1, it is characterised in that: the waterborne acrylic paint is
The copolymer of the two or more monomers of methyl methacrylate, styrene, ethyl acrylate, hydroxyethyl methacrylate；
And/or the coalescing agent, including levelling agent, defoaming agent, the defoaming agent are polyether modified siloxane class defoaming agent；
The levelling agent is Organo-modified type siloxane, with the one or more of active group esters of acrylic acid levelling agent；
And/or the function additive includes scratch resistance auxiliary agent, antiblock additive, the scratch resistance auxiliary agent is silica nanometer
Particle dispersion；
And/or the antiblock additive is one of high molecular weight dimethyl silicone polymer class or polyethylene wax class.
8. a kind of preparation method of aqueous transfer laser coating, it is characterised in that: according in claim 1 component and match into
Row production, includes the following steps,
Branched polyester, solvent one: being added sequentially in reaction vessel by the preparation of step 1, stereochemical structure presoma first, control
The two weight ratio is 1:1-3, heats and is completely dissolved temperature control at 60-80 DEG C to branched polyester；Then it is poly- that branching is added
1-4 times of amount of acid anhydrides of ester substance, and temperature is controlled at 100-120 DEG C, it is modified under nitrogen protection and reflux state
React 2-4h；
The preparation of step 2, base polyurethane prepolymer for use as: being added to heating stirring in reaction vessel for polyester polyol first and melt, and
Temperature control is dehydrated 1-2h under 90-100 DEG C, vacuum degree 50-90Kpa state；Then be cooled to 60-70 DEG C be slowly added to it is more
Isocyanates, catalyst heat and control temperature at 80-90 DEG C, polymerization reaction 2-4h, mistake are carried out under nitrogen protection state
Journey adds solvent two according to response situation and adjusts viscosity；
The preparation of step 3, stereochemical structure waterborne polyurethane resin: the resulting base polyurethane prepolymer for use as of step 2 is cooled to 40-60
DEG C, it is then slowly added into the resulting stereochemical structure presoma of step 1, insulation reaction 2-4h is eventually adding neutralizer, reacts 20-
40min, re-evaporation remove solvent, and deionized water is added and emulsifies to obtain stereochemical structure waterborne polyurethane resin；
The preparation of step 4, aqueous transfer laser coating: by stereochemical structure waterborne polyurethane resin, water-based acrylic resin, go from
Sub- water, coalescing agent, function additive are added sequentially to be dispersed with stirring in reaction vessel by weight percentage；Through disappearing after dispersion completion
Bubble, filtering and impurity removing obtain finished product.
9. a kind of preparation method of aqueous transfer laser coating according to claim 8, it is characterised in that: the step 1
In solvent one be at least one of acetone, dimethylformamide, dimethyl sulfoxide, dioxane, tetrahydrofuran.
10. a kind of preparation method of aqueous transfer laser coating according to claim 8, it is characterised in that: in the step 2
The pure and mild polyisocyanates of polyester polyols proportion use R(-NCO/-OH molar ratio) indicate, R value control in 2-5:1；
And/or in the step 2 adjust viscosity solvent two be acetone, dimethylformamide, dimethyl sulfoxide, dioxane,
At least one kind of in tetrahydrofuran, dosage is the 30-100% of the weight sum of the pure and mild polyisocyanates of polyester polyols；
And/or the neutralizer in the step 3 is at least one of diethanol amine, triethanolamine.
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| CN109679480A (en) * | 2018-12-19 | 2019-04-26 | 上海乘鹰新材料有限公司 | For disposably destroying the aqueous transfer coating of antifalsification label |
| CN109705711A (en) * | 2018-12-19 | 2019-05-03 | 上海乘鹰新材料有限公司 | A kind of light general color water paint and preparation method thereof |
| CN109735173A (en) * | 2018-12-28 | 2019-05-10 | 上海乘鹰新材料有限公司 | Hinder wet type aquosity composite citicall limited aluminium paint composition and preparation method thereof |
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