CN103801860A - Soldering flux for improving film-forming property - Google Patents
Soldering flux for improving film-forming property Download PDFInfo
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- CN103801860A CN103801860A CN201410057422.2A CN201410057422A CN103801860A CN 103801860 A CN103801860 A CN 103801860A CN 201410057422 A CN201410057422 A CN 201410057422A CN 103801860 A CN103801860 A CN 103801860A
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- scaling powder
- peg
- filming performance
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses soldering flux for improving the film-forming property. The soldering flux is prepared from 10-20 parts of activating agent, 2-6 parts of surface active agent, 0.3-0.8 part of cosolvent, 0.2-2 parts of film-forming agent, 0.04-0.09 part of corrosion inhibitor, 1-4 parts of antioxidant and the balance of deionized water, wherein the film-forming agent is prepared from at least one of PEG-1000, PEG-2000, PEG-4000 and PEG-6000, the surface active agent is prepared from at least one of FMEE and lutensol to (3,5,7,9) compounds, BTA and BIA are mixed to form the corrosion inhibitor, the antioxidant is prepared from at least one of tertiary butylhydroquinone, triclosan, tetrachloroisophthalonitrile and allicin, and the activating agent is prepared from at least two of glutaric acid, DL-malic acid, methylsuccinic acid and itaconic acid. With the method, the soldering flux for improving the film-forming property has the advantages of being free of halogen, low in residue, free of washing, environmentally friendly and the like.
Description
Technical field
The present invention relates to scaling powder field, particularly relate to a kind of scaling powder that improves filming performance.
Background technology
Along with the expanding day of high density, high-performance, lightweight, microminiaturized electronics applications scope; the enhancing of people's environmental protection consciousness and the restriction of relevant laws and regulations, the matching used novel water base no-clean scaling powder without the halogen-free VOC free of rosin of development and unleaded pavilion material becomes a vital task of current microelectronic packaging material research field.This type of scaling powder is mainly made up of activator, solvent, surfactant, film forming agent, additive etc.Film forming agent is as the important component part of scaling powder, it add the organic film that contributes to weld the densification of rear formation one deck, protection solder joint and substrate, thus there is certain Corrosion Protection, also can play the effect that stops pavilion material and welded metal to be again oxidized simultaneously.
The selection of film forming agent is required except realizing its due function, also should in welding process, present inert nature, reduce the negative effect to helping weldering performance; Can in welding process, try one's best and fully volatilize or decompose, reduce postwelding residual; The protective layer forming after welding completes should be without knot property, the outward appearance water white transparency of should trying one's best, to meet soldering reliability requirement and people's requirement of sense.The acrylic resin that the employing mass fractions such as the film forming agent in scaling powder is selected hydrocarbon, alcohol, ester etc. conventionally, such as Wang Wei section are 30%, as viscosity-controlling agent and film forming agent, has the performances such as corrosion-free, moistureproof.Xiang Jie etc. select content be the tristerin of 1.0%-2.0% as film forming agent, this substance makes after solvent evaporates, carries active material even film forming in printed board, and prevents that scolding tin from splashing.Chen Xin etc. select acrylic acid modified resin as film forming agent, after welding, harmful substance can be coated and have the effects such as corrosion-free, moistureproof.Zhou Haohao, is made an addition in scaling powder and can not only be played good filming function, and in multi-solvents, had good solubility property as film forming agent with PEG-2000.But in the water base no-clean scaling powder system of reporting at present, less to the system research of scaling powder performance impact about film forming agent, also less to the report of membrane formation mechanism, the selection that the content to film forming agent in scaling powder and proportioning are optimized scaling powder performance and the research of quantitative configuration are also less.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of scaling powder that improves filming performance, select content to improve the performance of scaling powder entirety by setting the optimization of film for, by the combination of BTA (BTA) and benzimidazole (BIA), reduce and pollute, replace traditional APEO surfactant by fatty acid methyl ester ethoxylate and isomery 13 carbon alcohol ethoxylates, can reduce pollution.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of scaling powder that improves filming performance is provided, comprise: the deionized water of activator 10-20 part, surfactant 2-6 part, cosolvent 0.3-0.8 part, film forming agent 0.2-2 part, corrosion inhibiter 0.04-0.09 part, antioxidant 1-4 part and surplus, in mass.
In a preferred embodiment of the present invention, described film forming agent is at least one in PEG-1000, PEG-2000, PEG-4000 and PEG-6000, and wherein to account for the mass percent of scaling powder be 20-25% to PEG-6000.
In a preferred embodiment of the present invention, described surfactant is at least one in fatty acid methyl ester ethoxylate and isomery 13 carbon alcohol ethoxylates.
In a preferred embodiment of the present invention, described corrosion inhibiter is that BTA (BTA) and benzimidazole (BIA) carry out composite mixture with mass ratio 1:1.
In a preferred embodiment of the present invention, described activator is two or more the mixture in glutaric acid, DL-malic acid, methylsuccinic acid, itaconic acid.
In a preferred embodiment of the present invention, described antioxidant is at least one in ditert-butylhydro quinone, triclosan and termil.
In a preferred embodiment of the present invention, described cosolvent is any three kinds and carry out composite mixture with mass ratio 1:1:1 in propylene glycol monomethyl ether, acetamide, acid amides and butyl glycol ether.
The invention has the beneficial effects as follows: the present invention improves the scaling powder of filming performance and selects content to improve the performance of scaling powder entirety by setting the optimization of film for, by the combination of BTA (BTA) and benzimidazole (BIA), reduce and pollute, replace traditional APEO surfactant by fatty acid methyl ester ethoxylate and isomery 13 carbon alcohol ethoxylates, can reduce pollution; In addition, the scaling powder that the present invention improves filming performance has halogen-free, low residue, exempts from the comprehensive advantages such as cleaning, convenient transportation and environmental protection, and cost is not high, is applicable to suitability for industrialized production.
The specific embodiment
To the technical scheme in the embodiment of the present invention be clearly and completely described below, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention comprises:
A scaling powder that improves filming performance, comprising: the deionized water of activator 10-20 part, surfactant 2-6 part, cosolvent 0.3-0.8 part, film forming agent 0.2-2 part, corrosion inhibiter 0.04-0.09 part, antioxidant 1-4 part and surplus, in mass.
Described film forming agent is at least one in PEG-1000, PEG-2000, PEG-4000 and PEG-6000, and wherein to account for the mass percent of scaling powder be 20-25% to PEG-6000.Postwelding, film forming agent forms diaphragm on solder joint surface, has strengthened the decay resistance of solder joint.Show by existing experiment: when scaling powder does not add film forming agent, solder joint is coarse, pavilion material spreading property is poor, and copper coin greening around, residual more; After scaling powder adds film forming agent, solder joint light is full, and pavilion material is sprawled better, and the situation of greening does not appear around in copper coin, without obviously corrosion, and residual also less.This is obviously the organic film that contributes to weld the densification of rear formation one deck due to adding of film forming agent, protection solder joint and substrate, thus there is certain Corrosion Protection.So the quality of film forming agent and content are directly connected to the welding quality problem of scaling powder.
Described surfactant is at least one in fatty acid methyl ester ethoxylate and isomery 13 carbon alcohol ethoxylates.Wherein, fatty acid methyl ester ethoxylate (FMEE) is a kind of typical non-ionic surface active agent, be with fatty acid methyl ester under corresponding catalyst effect, there is addition and make in direct and oxirane (EO), compared with traditional alcohol ethoxylate (AEO), there is low foam, high cloud point, the feature that the molten speed of cold water is fast and removing oil-removing wax is effective, still there is in the winter time good mobility, FMEE in various performances close to the TX that contains APEO, NP and OP series, under the background of abroad environmental protection being strict with, the toy that uses FMEE to replace TX or NP to process, floor, textile garment etc.,
Wherein, isomery 13 carbon alcohol ethoxylates belong to typical non-ionic surface active agent.Its raw material is the isomery C13 alcohol of Kang Diya, that the standby C12 alkene of a kind of use three polybutene legal systems is through the synthetic branched isomery primary alconol of carbonyl, the performance of this product differs from one another with the difference of the number of moles of ethylene oxide of addition, makes it the field of having a wide range of applications.The surface-active of this product is high, and wetting power, penetration, emulsifying capacity are strong, and Environmental compatibility is good, is the better product of substituted alkyl phenol ethoxylate.Its anti-hard water, chemical good stability within the scope of wider pH, is combined and has synergistic feature with other surfactants;
Adopt at least one in fatty acid methyl ester ethoxylate or isomery 13 carbon alcohol ethoxylates as surfactant, having outside the performance close with TX-10 with traditional OP, environmental protection more, health;
Above-mentioned APEO comprises NPE (NPEO), OPEO (OPEO), dodecyl phenol polyethenoxy ether (DPEO) and Dinonylphenol Polyoxyethylene Ether (DNPEO), wherein widely used polyoxyethylene nonylphenol ether is also the one in APEO, APEO can cause more serious harmfulness to ecological environment, harmful side product that comprises that toxicity is large, biodegradation is difficult, produce in environmental hormone effect and production process etc., people look for gradually its substitute and carry out the configuration of scaling powder.
Described corrosion inhibiter is that BTA (BTA) and benzimidazole (BIA) carry out composite mixture with mass ratio 1:1.
In the present invention, by adopting benzimidazole (BIA) and the composite corrosion inhibiter of BTA (BTA) replacement BTA (BTA), can also improve corrosion inhibition falling the hypotoxic while; In the time that the mass ratio of benzimidazole (BIA) and BTA (BTA) is 1:1, corrosion inhibition rate reaches 94.25%, and the corrosion inhibition rate when being greater than corrosion inhibiter and using separately, shows usually said " 1+1>2 " cooperative effect.And the BIA of other ratios and BTA are composite, corrosion inhibition rate is all less than 88.78 %, does not have remarkable synergistic enhancing effect, and its reason need further research.But BIA mixes after use so that mass ratio 1:1 is composite with BTA, shows cooperative effect, for the effect of giving full play to various inhibition components, improves inhibition efficiency, and the NEW TYPE OF COMPOSITE corrosion inhibitor formula under exploitation varying environment condition has great importance.
Described activator is two or more the mixture in glutaric acid, DL-malic acid, methylsuccinic acid, itaconic acid.
Described antioxidant is at least one in ditert-butylhydro quinone, triclosan and termil.Wherein, ditert-butylhydro quinone is a kind of white powdery crystallization, there is special odor, be soluble in ethanol and ether, dissolve in grease and actual water insoluble, and it or a kind of country allow the safe and efficient edible grease antioxidant of use, be applicable to vegetable oil, lard etc., there is good antioxidation, can strengthen the stability of oil within the shelf-life.Triclosan, termil and allicin are antiseptic;
Triclosan formal name used at school " triclosan ", chemical molecular formula is C12H7Cl3O2, has another name called " triclosan ", " Triclosan " etc., the normality of triclosan is white or the crystalline powder of canescence, slightly phenol stink.Water insoluble, be soluble in alkali lye and organic solvent, triclosan is a kind of broad spectrum antimicrobicide, is widely used among the household chemicals such as soap, toothpaste;
Described termil powder is pale powder, and adopted name is Bravo, and odorlessness is stable under storage at normal temperature condition, stable to illumination, stable in weak acid, weak base medium, decomposes non-corrosiveness in highly basic medium.The antioxidant effect of termil powder is very good, stronger 5～7 times than BHA, BHT, PG.Being applicable to animals and plants fat and fat-rich food, being specially adapted in vegetable oil, is that salad oil, ready-mixed oil, height are cooked the first-selected antioxidant of oil.Can effectively delay Oxidation of Fat and Oils, improve the stability of food, extend significantly the shelf life of grease and fat-rich food.It is also high temperature resistant, can be used for instant noodles, cake and other fried food, and the highest bearing temperature can reach more than 230 ℃.And it goes back potion multipotency, effectively anti-bacteria and fungus growth.Adding in range of application, can suppress nearly all bacterium and Yeast Growth, the mould that aspergillus flavus etc. is detrimental to health has good inhibitory action.
Described cosolvent is any three kinds and carry out composite mixture with mass ratio 1:1:1 in propylene glycol monomethyl ether, acetamide, acid amides and butyl glycol ether.
In the present invention, the mensuration of the rate of spread is measured according to People's Republic of China's machinery industry standard JB/T6173-1992 " water-soluble organic flux ".
In the present invention, the material of use also comprises: fine copper plate and Sn-3.0Ag-0.5Cu solder.
In the present invention, the instrument and equipment using in embodiment comprises:
OP-S600 adjustable thermostatic alloy pot tin melting furnace (production of Guangzhou chrysanthemum electronic tool Co., Ltd); DF-1015 heat collecting type constant-temperature heating magnetic stirring apparatus (production of Henan Yu Hua instrument Co., Ltd); JA4103 precise electronic balance (Shun's space permanent flat scientific and technological Instrument Ltd. in Shanghai produces); S-3400N (II) ESEM (Japanese HI TACHI company produce).
The configuration of scaling powder:
Take by weight each component raw material: the deionized water of activator 10-20 part, surfactant 2-6 part, cosolvent 0.3-0.8 part, film forming agent 0.2-2 part, corrosion inhibiter 0.04-0.09 part, antioxidant 1-4 part and surplus.At normal temperatures, cosolvent is added in the enamel still of clean band stirring, stir, first add indissoluble raw material, stir half an hour, add successively other raw material, continue to be stirred to all and dissolve, mix, stop stirring, standing filtration is scaling powder finished product.
The performance test of scaling powder:
The method of testing of SJ/T11273-2002 " exempting from the to clean liquid scaling powder " regulation of promulgating according to the Ministry of Information Industry, has carried out comprising the detection of the aspects such as outward appearance, physical stability, spreading ratio and non-volatile content river to scaling powder;
The test of spreading ratio:
On fine copper plate, place successively the scaling powder of lead-free brazing and preparation, heating certain hour makes its fusing, measures the spreading area of solder joint.Every part of scaling powder does sprawls test (3 samples) for 3 times, and each sample measurement is averaged for 3 times.Use one oneself know the marker object as a comparison of area, sprawl sample and object of reference is taken in a pictures by one group 3.With AutoCAD software respectively measurements and calculations go out the area of sprawling sample and object of reference in same pictures, calculate actual spreading area according to computing formula, the spreading area using the mean value of 3 test piece welding spot spreading areas as solder joint.
S=（S
2/S
0）*S
1
In formula, S is the actual spreading area of solder joint, unit: mm
2; S
2for the measured value of solder joint spreading area, unit: mm
2; S
0for marker area measurement value, unit: mm
2; S
1for marker real area, unit: mm
2.
Outward appearance, the physical stability of scaling powder are measured:
By the outward appearance of visual method check scaling powder.While detecting the physical stability of scaling powder, first stir scaling powder it is mixed, get 50mL sample in 100 mL test tubes, airtight, put into household freezer and be cooled to (5
2)
oc, and keep 60min, at this temperature, observe and whether have obvious layering or crystal the phenomenon such as to separate out.Then open test tube cap, sample is put in the baking oven without air circulation, (45
2)
owhether under C, keep 60 min, at this temperature, observing scaling powder has layering.
The mensuration of non-volatile content:
Accurately weighing 6g scaling powder (is accurate to 0.002 g), is labeled as m
1, put into water heater and heat, make most of banyan agent volatilization, then put it into (110
2)
oin C ventilated drying oven, dry 4 h, then take out, and are put in drier and are chilled to room temperature, weigh.Dry and weighing repeatedly, until weighing error remains on
within 0.05 g time, be constant, now sample mass is m
2.
The non-volatile content of scaling powder is:
w=（m
2/m
1）*100%；
In formula, w is nonvolatile matter quality mark in scaling powder, unit: %; m
1for the quality of initial sample, unit: g; m
2for sample is through 110
othe quality of nonvolatile matter while weighing after C is dry, unit: g.
The mensuration of acidity:
In the present invention, adopt pH meter to measure the acidity of scaling powder.
Below by embodiment, the invention will be further described:
Embodiment:
Scaling powder 100g, in mass, wherein, 10 parts, activator (2 parts of glutaric acids, 4 parts of DL-malic acid, 2 parts of methylsuccinic acids, 2 parts of itaconic acids); 4 parts, surfactant (2 parts of fatty acid methyl ester ethoxylates, 2 parts of isomery 13 carbon alcohol ethoxylates); 0.5 part of cosolvent (acetamide, acid amides and butyl glycol ether carry out composite mixture with mass ratio 1:1:1); 0.08 part of corrosion inhibiter (BTA BTA and benzimidazole BIA carry out composite mixture with mass ratio 1:1); Antioxidant 1-4 part (0.5 part of ditert-butylhydro quinone, 0.5 part of termil); Surplus is deionized water; Film forming agent 0.2-2 part.
Take by weight each component raw material, be added to successively in enamel still by the preparation method of above-mentioned scaling powder, stir, mix, standing filtration is scaling powder finished product.
By above-mentioned scaling powder according to film forming agent PEG-1000, PEG-2000, PEG-4000, the difference of PEG-6000 is labeled as respectively A, B, C, D group, every group according to mass fraction difference (0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.50%, 1.75%, 2.00%) be labeled as 8 parts, be followed successively by A1-A8, B1-B8, Cl-C8, D1-D8.
The experimental data recording according to said method is as follows:
Spreading area (the mm of solder joint
2):
| A( PEG-1000) | B( PEG-2000) | C( PEG-4000) | D( PEG-6000) | |
| 1(0.25%) | 45.73 | 47.94 | 49.52 | 61.15 |
| 2(0.50%) | 50.68 | 49.53 | 53.47 | 54.27 |
| 3(0.75%) | 52.84 | 53.82 | 50.56 | 53.32 |
| 4(1.00%) | 55.62 | 47.67 | 49.87 | 55.41 |
| 5(1.25%) | 51.31 | 46.35 | 47.65 | 51.59 |
| 6(1.50%) | 44.82 | 49.58 | 45.82 | 50.25 |
| 7(1.75%) | 44.71 | 45.43 | 46.93 | 51.43 |
| 8(2.00%) | 44.32 | 46.65 | 45.79 | 49.87 |
The content of nonvolatile matter in scaling powder (unit is mass fraction: %):
| A( PEG-1000) | B( PEG-2000) | C( PEG-4000) | D( PEG-6000) | |
| 1(0.25%) | 2.35 | 2.47 | 2.51 | 2.62 |
| 2(0.50%) | 2.58 | 2.65 | 2.72 | 2.83 |
| 3(0.75%) | 2.80 | 2.81 | 2.94 | 3.01 |
| 4(1.00%) | 3.03 | 3.10 | 3.18 | 3.32 |
| 5(1.25%) | 3.29 | 3.32 | 3.39 | 3.57 |
| 6(1.50%) | 3.43 | 3.57 | 3.62 | 3.79 |
| 7(1.75%) | 3.67 | 3.83 | 3.94 | 4.10 |
| 8(2.00%) | 3.94 | 4.05 | 4.18 | 4.35 |
The acidity of scaling powder:
| A( PEG-1000) | B( PEG-2000) | C( PEG-4000) | D( PEG-6000) | |
| 1(0.25%) | 2.37 | 2.30 | 2.37 | 2.41 |
| 2(0.50%) | 2.38 | 2.29 | 2.39 | 2.42 |
| 3(0.75%) | 2.34 | 2.28 | 2.40 | 2.42 |
| 4(1.00%) | 2.31 | 2.27 | 2.39 | 2.40 |
| 5(1.25%) | 2.30 | 2.29 | 2.38 | 2.41 |
| 6(1.50%) | 2.29 | 2.30 | 2.38 | 2.40 |
| 7(1.75%) | 2.29 | 2.30 | 2.37 | 2.39 |
| 8(2.00%) | 2.28 | 2.29 | 2.37 | 2.40 |
Show by experiment, after interpolation film forming agent, the acidity of scaling powder, between 2.27-2.42, changes little.It is acid that scaling powder is conventionally, could effectively remove like this oxide on mother metal surface, guarantees welding quality.Generally, the acidity of scaling powder stronger (being that pH value is less) its to remove ability of oxide stronger, but simultaneously can butt welding point reliability and pad work the mischief, corrode also stronger.The Acidity Range of scaling powder of the present invention meets the instructions for use (PH is 2.0-7.5) of no-clean scaling powder, and has no obvious corrosion after welding.
Conclusion:
A: 4 groups of scaling powders preparing as film forming agent with the polyethylene glycol PEG of 4 kinds of different molecular weights, stable transparent under normal temperature, without layering, has good physical stability; The interpolation of film forming agent is little to scaling powder Effect of Acidity On Absorption, and pH value, between 2.27-2.42, meets industry standard requirement.
B: all contribute to the increase of spreading area with the interpolation of the polyethylene glycol PEG of 4 kinds of different molecular weights, for PEG-1000, these 3 kinds of film forming agents of PEG-2000 and PEG-4000, with the increase of its addition, spreading area first increases and then decreases, but PEG-6000 is along with the increase of addition, and spreading area reduces gradually; Adding of polyethylene glycol PEG series film forming agent can form the coated solder joint of diaphragm under welding temperature, and makes copper coin smooth surface, contributes to improve the antiseptic property of scaling powder.
C: the addition of film forming agent is more, molecular weight is larger, it is more obvious that degree sent out sweet by copper coin, and in scaling powder, non-volatile content is just higher, should suitably be adjusted to according to combination property in actual applications the consumption of film.
The beneficial effect that the present invention improves the scaling powder of filming performance is:
One, select content to improve the performance of scaling powder entirety by setting the optimization of film for, by the combination of BTA (BTA) and benzimidazole (BIA), reduce and pollute, replace traditional APEO surfactant by fatty acid methyl ester ethoxylate and isomery 13 carbon alcohol ethoxylates, can reduce pollution; In addition, the scaling powder that the present invention improves filming performance has halogen-free, low residue, exempts from the comprehensive advantages such as cleaning, convenient transportation and environmental protection, and cost is not high, is applicable to suitability for industrialized production;
Two, by adopting the interpolation of polyethylene glycol PEG and the experimental study of different component of different molecular weight, the convenient scaling powder performance that quantizes, according to different demands, film forming agent is carried out to refinement configuration, in order to reach different demands by refinement component, be conducive to carry out industrialized large-scale production;
Three, have compared with the scaling powder of common raising filming performance that wetting power is strong, solderability is superior, can improve the welding performance of lead-free solder, postwelding plate face residue is few, and sprawls evenly, and without cleaning, surface insulation resistance is high; Adopt the corrosion inhibiter of the feature of environmental protection, improve environmental-protecting performance; Adopting antioxidant and bacteria remover to combine, improve solder flux performance, with common water base halogen-free, environmental protection antibacterial without having compared with rosin antimicrobial form no-clean scaling powder, stable feature, is novel environmental protection scaling powder.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. one kind is improved the scaling powder of filming performance, it is characterized in that, comprise: the deionized water of activator 10-20 part, surfactant 2-6 part, cosolvent 0.3-0.8 part, film forming agent 0.2-2 part, corrosion inhibiter 0.04-0.09 part, antioxidant 1-4 part and surplus, in mass.
2. the scaling powder of raising filming performance according to claim 1, is characterized in that, described film forming agent is at least one in PEG-1000, PEG-2000, PEG-4000 and PEG-6000, and wherein to account for the mass percent of scaling powder be 20-25% to PEG-6000.
3. the scaling powder of raising filming performance according to claim 1, is characterized in that, described surfactant is at least one in fatty acid methyl ester ethoxylate and isomery 13 carbon alcohol ethoxylates.
4. the scaling powder of raising filming performance according to claim 1, is characterized in that, described corrosion inhibiter is that BTA (BTA) and benzimidazole (BIA) carry out composite mixture with mass ratio 1:1.
5. the scaling powder of raising filming performance according to claim 1, is characterized in that, described activator is two or more the mixture in glutaric acid, DL-malic acid, methylsuccinic acid, itaconic acid.
6. the scaling powder of raising filming performance according to claim 1, is characterized in that, described antioxidant is at least one in ditert-butylhydro quinone, triclosan and termil.
7. the scaling powder of raising filming performance according to claim 1, is characterized in that, described cosolvent is any three kinds and carry out composite mixture with mass ratio 1:1:1 in propylene glycol monomethyl ether, acetamide, acid amides and butyl glycol ether.
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Cited By (5)
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| CN104646865A (en) * | 2014-12-26 | 2015-05-27 | 苏州龙腾万里化工科技有限公司 | Novel, environment-friendly, high-temperature resistant and hot-air-leveled soldering flux |
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| CN112171110A (en) * | 2020-09-17 | 2021-01-05 | 东莞市麦克莱恩新材料有限公司 | Preparation method of a new type of water-based stainless steel flux |
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| CN106944770A (en) * | 2017-04-01 | 2017-07-14 | 江门市资迪科技环保有限公司 | A kind of preparation method of water-in-oil type BNi5 soldering paste |
| CN106944770B (en) * | 2017-04-01 | 2019-04-12 | 江门市资迪科技环保有限公司 | A kind of preparation method of water-in-oil type BNi5 soldering paste |
| CN112171110A (en) * | 2020-09-17 | 2021-01-05 | 东莞市麦克莱恩新材料有限公司 | Preparation method of a new type of water-based stainless steel flux |
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