CN107573831B - A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating - Google Patents
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating Download PDFInfo
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Abstract
The present invention provides a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, and by weight, preparing raw material includes: 20-60 parts of waterborne polyurethane resin；40-80 parts of deionized water；0.1~15 part of drying aids；0.1~10 part of stabilizer；0.1~10 part of leveling auxiliary agent；0.1~10 part of defoaming agent；0.3~5 part of fungicide；0.3~4 part of delustering agent；0.3~2 part of fluorescer；0.3~2 part of anti-yellowing agent；0.1~3 part of other auxiliary agents.
Description
Technical field
The present invention relates to printed circuit board protection technology fields, and in particular to a kind of wiring board aqueous polyurethane three proofings
Paint.
Background technique
Three-proofing coating is widely used in electronic electric equipment wiring board anti-corrosion protection, as intelligent appliance, 3C Product, automobile control,
Variable-frequency power sources, Industry Control, aerospace, ship, energy resource system, outdoor electronic etc..One layer is coated by assist side surface
Three proofings coating material (abbreviation three-proofing coating) forms the protective film of layer of transparent, in room temperature or after being heating and curing with protection circuit plate
From the corrosion of external environment (humidity, mould, salt fog, Gao Chen, vibration, corrosive gas etc.), the reliability of wiring board is improved,
Increase the safety coefficient of electronic component.Aqueous polyurethane three-proofing coating of the invention can meet various construction technologies: spraying, brush
The semi-automatic and full-automatic coating processes such as painting, dipping, dispensing.
Three-proofing coating chemically can be divided mainly into acrylic resin, epoxy resin, organosilicon, polyurethane and poly- to two on ingredient
Five major class of toluene.Polyurethane resin is due to extraordinary flexibility and wear-resisting, chemical resistance, excellent combination property, protection
Effect is more preferable, is particularly suited for the anti-corrosion protection of wiring board.
The polyurethane three-proofing coating now used is the solvent type three-proofing coating using organic solvent as diluent.Solvent borne polyurethane three
It is anti-paint there are the problem of:
1) it using organic solvent as diluent, containing volatile organic matter (VOCs), is evaporate into air in solidification process,
Penetrating odor is generated, the mood of employee is influenced, reduces working efficiency；
2) VOCs belongs to toxic and harmful gas, and Long Term Contact causes the professional leukaemia hidden danger of employee；
3) it pollutes the environment, environmental protection policy requires to be increasingly stringenter, and faces policy pressure；
4) VOCs is inflammable and explosive, and there are great security risks during production, transport, storage.
5) in light, heat, oxygen, especially under the action of ultraviolet light, ammonia ester bond can be caused and decomposed, structural rearrangement is raw
At chromophoric groups such as quinoid structures, it may occur that Yellowing, influencing appearance even reduces anti-corrosion effect.
In order to solve the above problem existing for solvent borne polyurethane three-proofing coating, the present invention provides it is a kind of environmental protection, entirely without
VOCs, wiring board aqueous polyurethane three-proofing coating and preparation method thereof of excellent combination property, better protecting effect.
Summary of the invention
The present invention provides a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, and by weight, preparing raw material includes:
As one embodiment of the present invention, by weight, preparing raw material includes:
As one embodiment of the present invention, by weight, preparing raw material includes:
As one embodiment of the present invention, the waterborne polyurethane resin is hyperbranched silicone modified polyurethane tree
Rouge.
As one embodiment of the present invention, the waterborne polyurethane resin is prepared by polyalcohol and polyisocyanates
It arrives, and the number-average molecular weight of the polyalcohol is 1848.
As one embodiment of the present invention, the polydispersity index of the hyperbranched silicone modified polyurethane resin
It is 1.36.
As one embodiment of the present invention, the desiccant is selected from calcium oxide desiccant, silica-gel desiccant, montmorillonite
The combination of one or more of desiccant, molecular sieve desiccant, plant fiber desiccant.
As one embodiment of the present invention, the desiccant is selected from calcium oxide desiccant, silica-gel desiccant, montmorillonite
The combination of one or more of desiccant, molecular sieve desiccant, plant fiber desiccant.
As one embodiment of the present invention, the leveling auxiliary agent is selected from organic silicon-type leveling auxiliary agent.
The second aspect of the present invention, which provides, a kind of prepares a kind of above-mentioned wiring board anti-corrosion aqueous polyurethane three-proofing coating
The step of method, the method are as follows:
1) by number, first aqueous polyurethane resin, stabilizer carry out being mixed 30 minutes at 20-35 DEG C；
2) it is added deionized water in the step 1), drying aids are mixed evenly to being completely dissolved；
3) leveling auxiliary agent, defoaming agent, fungicide, delustering agent, fluorescer, anti-yellowing agent are added in step 2) to be mixed
Uniformly；
4) it is mixed evenly and obtains in middle other auxiliary agents of addition of step 3).
The utility model has the advantages that
(1) wiring board provided by the invention is one kind using deionized water or distilled water as dilution with aqueous polyurethane three-proofing coating
The one pack system three proofings coating material of agent, the corruption of electronic component and integrated circuit from external environment on protection circuit plate
Erosion.
(2) wiring board provided by the invention is added to non-metallic catalyst with aqueous polyurethane three-proofing coating, is free of free property
Ion, therefore paint film is non-conductive before solidification, good insulating.
(3) by adding the cosolvent of low molecular weight, volatile organic matter (VOCs) ingredient is entirely free of in solvent.
(4) by addition anti-yellowing agent, make aqueous polyurethane three-proofing coating that Yellowing will not occur.
(5) by adding inorganic silicon materials, different degrees of photoextinction can be effectively played, makes paint film that there is light and mute
Two kinds of effects of light, can obtain 1~60% any gloss.Matte effect can realize wiring board two-dimensional code scanning, solve bright
The problem of light can not scan the two-dimensional code, convenient for the tracking of wiring board subsequent operation process.
(6) oxidation reaction and moisture evaporation that the solidification of wiring board aqueous polyurethane three-proofing coating is participated in based on oxygen are dual
Principle occurs oxidation reaction and improves curing rate, solves the problems, such as that moisture evaporation is slow, curing time is long, enhances simultaneously
The adhesive force of paint film and wiring board.
(7) aqueous polyurethane three-proofing coating provided by the invention is using waterborne polyurethane resin as host agent, with deionized water or steaming
Distilled water is solvent, is entirely free of organic solvent, and safety and environmental protection is nonflammable explosive；It is non-toxic and tasteless harmless, it solves existing
The solvent borne polyurethane three-proofing coating feature of environmental protection is poor, and there are inflammable and explosive hidden danger, the problem of being detrimental to health.Curing rate is fast, tool
There are two kinds of paint film effects of light and dumb light, and Yellowing will not occur, excellent combination property is easy to operate to be suitable for various apply
Work technique, can be to the use offer anti-corrosion protection of wiring board under various environment.
Specific embodiment
The detailed description for preferred implementation method of the invention below of participating in the election of and including embodiment this hair can be more easily to understand
Bright content.Unless otherwise defined, all technologies used herein and scientific term have common with fields of the present invention
The normally understood identical meaning of technical staff.When there is a conflict, the definition in this specification shall prevail.
As used herein term " by ... preparation " it is synonymous with "comprising".Term "comprising" used herein, " comprising ",
" having ", " containing " or its any other deformation, it is intended that cover non-exclusionism includes.For example, the combination comprising listed elements
Object, step, method, product or device are not necessarily limited to those elements, but may include not expressly listed other elements or
Such composition, step, method, product or the intrinsic element of device.
Conjunction " Consists of " excludes any element that do not point out, step or component.If in claim, this
Phrase will make claim closed, so that it is not included the material in addition to the material of those descriptions, but relative normal
Except rule impurity.When being rather than immediately following after theme in the clause that phrase " Consists of " appears in claim main body,
It is only limited to element described in the clause；Other elements are not excluded except the claim as a whole.
Equivalent, concentration or other values or parameter are excellent with range, preferred scope or a series of upper limit preferred values and lower limit
When the Range Representation that choosing value limits, this should be understood as specifically disclosing by any range limit or preferred value and any range
Any pairing of lower limit or preferred value is formed by all ranges, regardless of whether the range separately discloses.For example, when open
When range " 1 to 5 ", described range should be interpreted as including range " 1 to 4 ", " 1 to 3 ", " 1 to 2 ", " 1 to 2 and 4 to
5 ", " 1 to 3 and 5 " etc..When numberical range is described herein, unless otherwise stated, otherwise the range is intended to include its end
Value and all integers and score in the range.
Singular includes that plural number discusses object, unless the context clearly dictates otherwise." optional " or it is " any
It is a kind of " refer to that the item described thereafter or event may or may not occur, and the description include situation that event occurs and
The situation that event does not occur.
Approximate term in specification and claims is used to modify quantity, and it is specific to indicate that the present invention is not limited to this
Quantity further includes the acceptable modified part without will lead to the change of dependency basis this function close with the quantity.Phase
It answers, modifies a numerical value with " about ", " about " etc., mean that the present invention is not limited to the exact numericals.In some examples, approximate
Term likely corresponds to the precision of the instrument of measurement numerical value.In present specification and claims, range limits can be with
Combination and/or exchange, these ranges if not stated otherwise include all subranges contained therebetween.
In addition, indefinite article "an" before element of the present invention or component and "one" quantitative requirement to element or component
(i.e. frequency of occurrence) unrestriction.Therefore "one" or "an" should be read as including one or at least one, and odd number
The element or component of form also include plural form, unless the obvious purport of the quantity refers to singular.
The present invention provides a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, and by weight, preparing raw material includes:
Aqueous polyurethane
Aqueous polyurethane is to replace organic solvent as the new polyurethane system of decentralized medium using water, and also referred to as water dispersion is poly-
Urethane, aqueous polyurethane or water-based polyurethane.Aqueous polyurethane takes water as a solvent, pollution-free, safe and reliable, mechanical performance is excellent
Good, the advantages that compatibility is good, easily modified.
The Water-borne modification of polyurethane resin gradually replaces solvent type, becomes the important directions of polyurethane industrial development.It is aqueous
Polyurethane can be widely applied to coating, adhesive, fabric coating and finishing agent, leather finishing agent, sheet surface treating agent and fibre
Tie up surface treating agent.
Aqueous polyurethane (partial size < 0.001 micron, appearance transparent), polyurethane aqueous can be divided by partial size and appearance point
Granular media (partial size: 0.001-0.1 microns, translucent appearance), polyaminoester emulsion (partial size > 0.1 micron, appearance gonorrhoea)；
According to the charge property of hydrophilic radical, aqueous polyurethane can be divided into anion-type water-thinned polyurethane, cationic water
Property polyurethane and non-ion aqueous polyurethane.Wherein anionic is mostly important, is divided into carboxylic acid type and sulfonic acid type two major classes.
Polyether-type, polyester-type and polyethers, polyester mixed type can be divided into according to synthon difference aqueous polyurethane.According to selection
Diisocyanate difference, aqueous polyurethane can be divided into aromatic series and aliphatic again, or be specifically divided into TDI type, HDI type etc.
Deng.
Monocomponent waterborne polyurethane and dual-component aqueous polyurethane can be divided into according to product packaging form aqueous polyurethane.
Heretofore described waterborne polyurethane resin is hyperbranched silicone modified polyurethane resin, specifically prepares raw material
Are as follows: bis- (Chlorodimethyl silicon substrate) ethane of polyethylene glycol, 2,2- dimethylolpropionic acid, p-methyl benzenesulfonic acid, 1,2-, isocyanic acid-front three
Base silane, it is specific the preparation method is as follows:
1、
The number-average molecular weight for the polyalcohol that the step 1 obtains is 1000-2000.Polyethylene glycol in the step 1 and
The molar ratio of 2,2- dimethylolpropionic acids is 0.1:1.4, and the number-average molecular weight of the polyethylene glycol in the step 1 is 1000.
2、
Bis- (Chlorodimethyl silicon substrate) ethane of 1,2- described in step 2 and isocyanic acid-trimethyl silane molar ratio are 0.5:
1.3。
3、
4、
The polydispersity index for the hyperbranched silicone modified polyurethane resin that the step 4 obtains is 1.36.
In the present invention, the molecular weight and molecualr weight distribution is to measure to obtain using GPC method.
Desiccant: heretofore described desiccant is selected from calcium oxide desiccant, silica-gel desiccant, montmorillonite desiccant, divides
The combination of one or more of son sieve desiccant, plant fiber desiccant.
Stabilizer: heretofore described stabilizer can be heat-resisting stabilizing agent, resistance to light stabilizer, gasproof stabilizer.
Hinered phenols stabilizer, amines stabilizer, phosphorous type stabilizers, sulphur stabilizer etc. can be enumerated as heat-resisting stabilizing agent
Stabilizer.Hindered amine light stabilizer etc. can be enumerated, more specifically for example, AdekaStabLA62,
AdekaStabLA67 (the above are Adeka Argus chemical company systems, trade name), Tinuvin292, Tinuvin144,
Tinuvin123, Tinuvin440 (the above are CibaSpecialtyChemicals corporations, trade name) etc..
As resistance to light stabilizer, can enumerate benzophenone ultraviolet absorbent, Benzotriazole Ultraviolet Stabilizer,
Hindered amines ultraviolet absorbing agent, salicylic acid salt ultraviolet absorbing agent, cyanoacrylate ultraviolet absorbent, acrylonitrile
Class ultraviolet absorbing agent, nickel or cobalt preferably enumerate benzophenone ultraviolet absorbent, benzo with salt ultraviolet absorbers etc.
Triazole type ultraviolet absorbing agent.
Multiple function stable agent is, for example, the stabilizer with two kinds of functions of ultraviolet radiation absorption and anti-oxidation function, as
This stabilizer can specifically enumerate benzotriazole-alkyl bisphenol compound etc..
In the present invention, the stabilizer is AdekaStabLA62.
Leveling auxiliary agent
As leveling auxiliary agent, any appropriate levelling agent can be used, as long as not damaging effect of the invention.This stream
The example of flat agent includes acrylic compounds levelling agent, fluorine-based levelling agent and polysiloxane group levelling agent.The reality of acrylic compounds levelling agent
Example includes No. Polyflow36, No. Polyflow56, No. Polyflow85HF and No. Polyflow99C.The reality of fluorine-based levelling agent
Example includes Megafac F470N and MegafacF556.The example of polysiloxane group levelling agent includes GRANDICPC4100.
As one embodiment of the present invention, heretofore described leveling auxiliary agent is organic silicon-type leveling auxiliary agent, specifically
The preparation method is as follows:
1, allyl bromide, bromoallylene (0.9mol), bisphenol-A (0.3mol) and potassium carbonate (0.1mol) are dissolved in acetone (50mL),
80 DEG C are heated to after stirring 30 minutes at room temperature, isothermal reaction 12 hours, product was alternately washed 3 times through second alcohol and water, then true
(80 DEG C) are dried in vacuo in empty drying box, obtain product 1；
2, product 1 (1mol), epoxychloropropane (10mol) and 4 bromide (0.06mol) are stirred at room temperature
After twenty minutes, then under nitrogen atmosphere, be heated to 95 DEG C maintain 2 hours, then be added dropwise sodium hydroxide solution (2mol,
48wt%) into four neck round-bottom flasks, reaction temperature is then maintained 95 DEG C, reacts 4 hours, obtains product 2；
3, by product 2 and 1,1,2,2- tetramethyl disilane be prepare raw material (allyl double bonds and the molar ratio of SiH are 1:
1) Pt catalyst (concentration 15ppm), is added, is dissolved in toluene, the above-mentioned raw material for preparing is added to together in four-neck flask,
It reacts 2 hours for 90 DEG C under nitrogen atmosphere, then removes excess of solvent with rotary evaporator, obtain organosilicon leveling auxiliary agent.
Defoaming agent
Heretofore described defoaming agent can be any defoaming agent under the premise of not influencing effect of the invention, can
To enumerate long-chain alcohol (octanol etc.), sorbitan derivative (sorbitan monooleates etc.), silicone oil (polymethyl siloxane and poly-
Ether modified polyorganosiloxane etc.) etc..
Fungicide
Heretofore described fungicide can be any fungicide under the premise of not influencing effect of the invention, make
For fungicide, pentachlorophenol, pentachlorophenyl laurate and bis oxide (tri-n-butyl tin), the different thiophene of 5- chloro-2-methyl -4 can be enumerated
The product that Japan's Sheng Nuopuke (SAN-NOPCO) Chemical Co., Ltd.'s trade mark is A33 can be selected in oxazoline -3- ketone.
Delustering agent
As delustering agent, can be used by the one kind or two or more combination in organic system micro mist or inorganic system's micro mist
The substance of composition.As the organic system micro mist used at this time, be not particularly limited, can be used for example acrylic resin particle,
Styrene resin particle, styrene-acrylic resins particle, phenolic resin particle, melamine resin particle, acrylic acid-are poly-
Urethane resin particle, polyurethane resin particle, polyester resin particle, nylon resin particle, organic siliconresin particle, polyethylene tree
Fat granule etc..The range that the average grain diameter of these powder preferred particles is 0.1~10 μm.In addition, actually being answered about its shape
The preferred spherical or approximate sphericity in, because the extinction for being formed by film is especially excellent.
In addition, as inorganic system's micro mist, can enumerate talcum, mica, calcium carbonate, barium sulfate, magnesium carbonate, clay, aluminium oxide,
Silica, carbon fiber, glass fibre, metallic fiber, carbon black, titanium oxide, molybdenum, magnesium hydroxide, bentonite, graphite etc..As
These powder, average grain diameter meet the purpose of the present invention for 10 μm of particles below, but preferably small as far as possible.
Fluorescer
The preferably double triazinylamino stilbenes disulfonic acid derivatives of heretofore described fluorescer, coumarin derivative, pyrazoles
Quinoline derivant, naphthalimide derivative, benzoxazoles derivative, distyrylbiphenyl derivatives, triazole derivative compound,
At least one of anthracene derivant.Specifically, double triazinylamino stilbenes disulfonic acid derivatives can be enumerated；HakkolBS is (clear
With chemical industry Co., Ltd. manufacture), coumarin derivative；Kayalight-B (Nippon Kayaku K. K's manufacture), 7- (two
Methylamino) -4- methylcoumarin, 4- methyl -7- aminocoumarin, pyrazoline derivative；MoltoprenFB
(manufacture of RheinChemie company), naphthalimide derivative；N- methyl -4- methoxyl group -1,8- naphthalimide, benzoxazolyl
Derivative；Kayalight-OS (Nippon Kayaku K. K's manufacture), 2- (2- hydroxy phenyl) benzoxazoles, 2,5- sulfydryl penylene
Diyl bis- (5- tert-butyl -1,3- benzoxazoles), 4- (benzoxazoles -2- base) -4 '-(5- methylbenzoxazole -2- base) stilbene, two
Styrylbiphenyl derivative；4,4 '-bis- (styryl) biphenyl, 4,4 '-bis- (2- methoxyl-styrenes) -1,1 '-biphenyl,
Triazole derivative；3- phenyl -7- (4- methyl -5- phenyl -1,2,3- triazole -2- base) cumarin, 3- phenyl -7- (2H- naphtho-
[1,2-d]-triazole -2- base) cumarin, anthracene derivant；Bis- (phenethyl) anthracenes of 9,10- diphenylanthrancene, 9,10- etc..These fluorescence
Agent can be used alone, can also mix two or more come using.
Anti-yellowing agent
Heretofore described anti-yellowing agent is selected from Hinered phenols anti-yellowing agent, hindered amines anti-yellowing agent, phosphorous acid esters
One or more of anti-yellowing agent, sulphur class anti-yellowing agent, it is preferable that Hinered phenols anti-yellowing agent and phosphorous acid esters yellowing-resistant
Agent.Anti-yellowing dose of Hinered phenols can capture peroxylradicals, anti-yellowing dose of energy hydroperoxide decomposition of phosphorous acid esters, the two association
Together, effect is more preferable.
Other auxiliary agents
It should be noted that when manufacturing waterborne polyurethane resin three-proofing coating of the invention, it as needed can be to be suitable for
Ratio further cooperate well known additive, such as internal mold release, plasticizer, even paint, delustering agent, fire retardant, thixotroping
Agent, adhesive, thickener, lubricant, antistatic agent, surfactant, reaction suppressor, dehydrating agent, antioxidant, ultraviolet light
Absorbent, hydrolysis inhibitor, weatherability stabilizer, inorganic pigment, organic pigment, extender pigment, silane coupling agent, titanium coupling
Agent, organic phosphite, thickener, thixotropic agent, freeze-stable agent, delustering agent, catalyst for cross-linking reaction, is prevented organic phosphate
Crust forming agent, dispersing agent, wetting agent, filler, plasticizer, lubricant, reducing agent, preservative, mould inhibitor, deodorant, yellowing-resistant
Agent, ultraviolet absorbing agent, antistatic agent or electrification regulator, the combination such as antiprecipitant.In order to improve point in three-proofing coating
Property is dissipated, surfactant can be further added, in order to improve the storage stability of three-proofing coating, can further add anti-oxidant
Agent, light stabilizer and polymerization inhibitor.
As one embodiment of the present invention, by weight, preparing raw material includes:
As one embodiment of the present invention, by weight, preparing raw material includes:
The second aspect of the present invention provides the method for preparing a kind of above-mentioned wiring board anti-corrosion aqueous polyurethane three-proofing coating,
It is characterized in that, the step of the method are as follows:
1) by number, first aqueous polyurethane resin, stabilizer carry out being mixed 30 minutes at 20-35 DEG C；
2) it is added deionized water in the step 1), drying aids are mixed evenly to being completely dissolved；
3) leveling auxiliary agent, defoaming agent, fungicide, delustering agent, fluorescer, anti-yellowing agent are added in step 2) to be mixed
Uniformly；
4) it is mixed evenly and obtains in middle other auxiliary agents of addition of step 3).
Embodiment 1: present embodiment provides a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, by weight,
It prepares raw material:
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in 2. embodiment 1 of embodiment, by weight,
It prepares raw material:
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in 3. embodiment 1 of embodiment, by weight,
It prepares raw material:
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in 4. embodiment 1 of embodiment, it is described aqueous poly-
Urethane resin is hyperbranched silicone modified polyurethane resin.
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in 5. embodiment 1 of embodiment, it is described aqueous poly-
Urethane resin is prepared by polyalcohol and polyisocyanates, and the number-average molecular weight of the polyalcohol is 1000-2000.
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, described hyperbranched described in 6. embodiment 4 of embodiment
The polydispersity index of organic silicon modified polyurethane resin is 1.36.
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, the desiccant described in 7. embodiment 1 of embodiment
Selected from one of calcium oxide desiccant, silica-gel desiccant, montmorillonite desiccant, molecular sieve desiccant, plant fiber desiccant
Or several combination.
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, the desiccant described in 8. embodiment 1 of embodiment
Selected from one of calcium oxide desiccant, silica-gel desiccant, montmorillonite desiccant, molecular sieve desiccant, plant fiber desiccant
Or several combination.
A kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, the levelling described in 9. embodiment 1 of embodiment help
Agent is selected from organic silicon-type leveling auxiliary agent.
Embodiment 10. is a kind of to prepare a kind of described in any item wiring board anti-corrosion aqueous polyurethanes of embodiment 1-9
The method of three-proofing coating, which is characterized in that the step of the method are as follows:
1) by number, first aqueous polyurethane resin, stabilizer carry out being mixed 30 minutes at 20-35 DEG C；
2) it is added deionized water in the step 1), drying aids are mixed evenly to being completely dissolved；
3) leveling auxiliary agent, defoaming agent, fungicide, delustering agent, fluorescer, anti-yellowing agent are added in step 2) to be mixed
Uniformly；
4) it is mixed evenly and obtains in middle other auxiliary agents of addition of step 3).
The present invention is specifically described below by embodiment.It is necessarily pointed out that following embodiment is only used
In the invention will be further described, it should not be understood as limiting the scope of the invention, professional and technical personnel in the field
The some nonessential modifications and adaptations made according to the content of aforementioned present invention, still fall within protection scope of the present invention.
In addition, if without other explanations, it is raw materials used to be all commercially available.
Embodiment 1: the present embodiment provides a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coatings, by weight, system
Standby raw material includes:
Heretofore described waterborne polyurethane resin is hyperbranched silicone modified polyurethane resin, specifically prepares raw material
Are as follows: bis- (Chlorodimethyl silicon substrate) ethane of polyethylene glycol, 2,2- dimethylolpropionic acid, p-methyl benzenesulfonic acid, 1,2-, isocyanic acid-front three
Base silane, it is specific the preparation method is as follows:
1、
The number-average molecular weight for the polyalcohol that the step 1 obtains is 1000-2000.Polyethylene glycol in the step 1 and
The molar ratio of 2,2- dimethylolpropionic acids is 0.1:1.4, and the molecular weight of the polyethylene glycol in the step 1 is Mn=1000.
2、
Bis- (Chlorodimethyl silicon substrate) ethane of 1,2- described in step 2 and isocyanic acid-trimethyl silane molar ratio are 0.5:
1.3。
3、
4、
The polydispersity index for the hyperbranched silicone modified polyurethane resin that the step 4 obtains is 1.36.
Desiccant: drying machine described in the present embodiment is calcium oxide desiccant.
Stabilizer: stabilizer described in the present embodiment is AdekaStabLA62.
Leveling auxiliary agent: leveling auxiliary agent described in the present embodiment is organic silicon-type leveling auxiliary agent, it is specific the preparation method is as follows:
1, allyl bromide, bromoallylene (0.9mol), bisphenol-A (0.3mol) and potassium carbonate (0.1mol) are dissolved in acetone (50mL),
80 DEG C are heated to after stirring 30 minutes at room temperature, isothermal reaction 12 hours, product was alternately washed 3 times through second alcohol and water, then true
(80 DEG C) are dried in vacuo in empty drying box, obtain product 1；
2, product 1 (1mol), epoxychloropropane (10mol) and 4 bromide (0.06mol) are stirred at room temperature
After twenty minutes, then under nitrogen atmosphere, be heated to 95 DEG C maintain 2 hours, then be added dropwise sodium hydroxide solution (2mol,
48wt%) into four neck round-bottom flasks, reaction temperature is then maintained 95 DEG C, reacts 4 hours, obtains product 2；
3, by product 2 and 1,1,2,2- tetramethyl disilane be prepare raw material (allyl double bonds and the molar ratio of SiH are 1:
1) Pt catalyst (concentration 15ppm), is added, is dissolved in toluene, the above-mentioned raw material for preparing is added to together in four-neck flask,
It reacts 2 hours for 90 DEG C under nitrogen atmosphere, then removes excess of solvent with rotary evaporator, obtain organosilicon leveling auxiliary agent.
Defoaming agent: defoaming agent described in the present embodiment is octanol.
Fungicide: fungicide described in the present embodiment is -4 isothiazoline -3- ketone of 5- chloro-2-methyl.
Delustering agent: delustering agent described in the present embodiment is silica, and average grain diameter is 10 μm or less.
Fluorescer: fluorescer described in the present embodiment is 9,10- diphenylanthrancene.
Anti-yellowing agent: anti-yellowing agent described in the present embodiment is PUR1 anti-yellowing agent.
Embodiment 2: the present embodiment the difference from embodiment 1 is that, by weight, preparing raw material includes:
Embodiment 3: the present embodiment the difference from embodiment 1 is that, by weight, preparing raw material includes:
Embodiment 4: the difference from embodiment 1 is that, the aqueous polyurethane replaces with commercially available, and specific purchase is from Anhui
An great Hua Tai new material Co., Ltd, model AH-1604.
Embodiment 5: the difference from embodiment 1 is that, the leveling auxiliary agent is dimethyl silicone polymer.
Embodiment 6: the difference from embodiment 1 is that, the aqueous polyurethane replaces with commercially available, and specific purchase is from Anhui
An great Hua Tai new material Co., Ltd, model AH-1604；The leveling auxiliary agent is dimethyl silicone polymer.
Test:
Test result:
Example above-mentioned is merely illustrative, some features of the feature for explaining the disclosure.The attached claims
It is intended to the range as wide as possible for requiring to be contemplated that, and embodiments as presented herein is only according to all possible embodiment
Combined selection embodiment explanation.Therefore, the purpose of applicant is that the attached claims are not illustrated the present invention
Feature exemplary selectional restriction.And the progress in science and technology will be formed language express it is inaccurate due to and not
The possible equivalent being presently considered or son replacement, and these variations should also be interpreted in the conceived case by appended
Claim covering.
Claims (6)
1. a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating, which is characterized in that by weight, preparing raw material includes:
The waterborne polyurethane resin is hyperbranched silicone modified polyurethane resin, and preparing raw material is polyethylene glycol, 2,2- bis-
Bis- (Chlorodimethyl silicon substrate) ethane of hydroxymethylbutyrate, p-methyl benzenesulfonic acid, 1,2-, isocyanic acid-trimethyl silane, preparation method is such as
Under:
1)
The number-average molecular weight for the polyalcohol that the step 1) obtains is 1000-2000；Polyethylene glycol in the step 1) and 2,
The molar ratio of 2- dimethylolpropionic acid is 0.1:1.4；The number-average molecular weight of polyethylene glycol in the step 1) is 1000；
2)
Bis- (Chlorodimethyl silicon substrate) ethane of 1,2- described in the step 2) and isocyanic acid-trimethyl silane molar ratio are 0.5:
1.3；
3)
4)
2. a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in claim 1, which is characterized in that by weight,
It prepares raw material:
3. a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in claim 1, which is characterized in that described hyperbranched have
The polydispersity index of machine silicon modified polyurethane resin is 1.36.
4. a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in claim 1, which is characterized in that the drying helps
Agent in calcium oxide desiccant, silica-gel desiccant, montmorillonite desiccant, molecular sieve desiccant, plant fiber desiccant one
Kind or several combinations.
5. a kind of wiring board anti-corrosion aqueous polyurethane three-proofing coating described in claim 1, which is characterized in that the leveling auxiliary agent
Selected from organic silicon-type leveling auxiliary agent.
6. a kind of prepare a kind of described in any item methods of wiring board anti-corrosion aqueous polyurethane three-proofing coating of claim 1-5,
It is characterized in that, the step of the method are as follows:
1) by number, first aqueous polyurethane resin, stabilizer carry out being mixed 30 minutes at 20-35 DEG C；
2) it is added deionized water in the step 1), drying aids are mixed evenly to being completely dissolved；
3) leveling auxiliary agent, defoaming agent, fungicide, delustering agent, fluorescer, anti-yellowing agent are added in step 2) to be mixed
It is even；
4) it is mixed evenly and obtains in middle other auxiliary agents of addition of step 3).
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Families Citing this family (12)
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| CN108690488A (en) * | 2018-05-02 | 2018-10-23 | 苏州捷德瑞精密机械有限公司 | A kind of electronic circuit board three proofings coating material and preparation method thereof |
| CN108949006B (en) * | 2018-06-04 | 2020-06-19 | 亿铖达（深圳）新材料有限公司 | High-flash-point polyurethane three-proofing paint for non-hazardous chemicals |
| CN108659701B (en) * | 2018-06-04 | 2020-05-19 | 亿铖达（深圳）新材料有限公司 | Thixotropic polyurethane thick-layer coating three-proofing paint |
| CN109777284A (en) * | 2019-01-12 | 2019-05-21 | 黄彬彬 | A kind of preparation method of rapid curing salt spray resistance three-proofing coating |
| CN110183950A (en) * | 2019-03-21 | 2019-08-30 | 天津灯塔涂料工业发展有限公司 | Aqueous polyurethane insulated paint for electrical industry |
| CN110003430A (en) * | 2019-04-08 | 2019-07-12 | 陕西科技大学 | A kind of naphthalimide polyaminoester emulsion and its preparation method and application |
| CN110079206A (en) * | 2019-05-08 | 2019-08-02 | 珠海长先新材料科技股份有限公司 | A kind of aqueous polyurethane three-proofing coating and preparation method thereof |
| CN110547119A (en) * | 2019-09-12 | 2019-12-10 | 广州搏弈园林绿化有限公司 | Ancient tree rejuvenation method |
| CN112521580B (en) * | 2020-12-03 | 2022-06-10 | 浙江华峰热塑性聚氨酯有限公司 | Thermoplastic polyurethane elastomer composition |
| CN113773738A (en) * | 2021-09-13 | 2021-12-10 | 陈正林 | Automobile sealing strip front end spraying coating and preparation method thereof |
| CN114045101A (en) * | 2021-12-21 | 2022-02-15 | 河北慧科电子科技有限公司 | Waterborne polyurethane three-proofing paint and preparation method thereof |
| CN117551385B (en) * | 2023-09-04 | 2024-06-07 | 烟台大学 | Preparation method of flame-retardant, light-resistant, low-VOC and water-permeable polyurethane coating |
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| CN106589280A (en) * | 2016-11-11 | 2017-04-26 | 湖北大学 | Silicon-modified hyperbranched polyurethane and preparation method thereof |
| CN106867383A (en) * | 2017-03-20 | 2017-06-20 | 合肥科天水性科技有限责任公司 | A kind of water and oil applicable type woodenware renovation clear finish and preparation method thereof |
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| CN106589280A (en) * | 2016-11-11 | 2017-04-26 | 湖北大学 | Silicon-modified hyperbranched polyurethane and preparation method thereof |
| CN106867383A (en) * | 2017-03-20 | 2017-06-20 | 合肥科天水性科技有限责任公司 | A kind of water and oil applicable type woodenware renovation clear finish and preparation method thereof |
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