CN104148825A - Lead-free environment-friendly welding-aid paste - Google Patents
Lead-free environment-friendly welding-aid paste Download PDFInfo
- Publication number
- CN104148825A CN104148825A CN201410394569.0A CN201410394569A CN104148825A CN 104148825 A CN104148825 A CN 104148825A CN 201410394569 A CN201410394569 A CN 201410394569A CN 104148825 A CN104148825 A CN 104148825A
- Authority
- CN
- China
- Prior art keywords
- rosin
- welding
- activator
- weld
- composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B23K35/3612—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 organic compounds as principal constituents
- B23K35/3613—Polymers, e.g. resins
-
- 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
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
- B23K35/025—Pastes, creams, slurries
-
- 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
Abstract
The invention discloses lead-free environment-friendly welding-aid paste. The lead-free environment-friendly welding-aid paste comprises, by mass percent, 35-40% of rosin matrixes, 52.5-60% of solvent, 4.0-5.5% of activating agents, 0.3-0.5% of surface active agent and 0.7-1.5% of supplemented addition agents, wherein the rosin matrixes are hydrogenated rosin, or water galbanum, or polymerized rosin or compound rosin formed by any two of the hydrogenated rosin, the water galbanum and the polymerized rosin according to a certain proportion, the solvent is compound solvent which is one or more than two of ethyl alcohol, isopropyl alcohol, butyl cellosolve and diethylene glycol, the activating agents are organic acid which volatilizes at the lead-free welding temperature and is free from residue after welding is carried out, and the supplemented addition agents are compounded by selecting and compounding one or more of thixotropic agents, curing agents, corrosion inhibitors and flavoring agents. By development and application of the welding-aid paste, residual insulating resistance after welding is carried out can be remarkably increased, wetting is promoted, the welding-aid property of scaling powder is improved, the insulating property after welding is carried out meets the requirement for the L-type scaling powder in IPC/J-STD-004B, and the welding reliability requirement of common consumer electronics can be met.
Description
Technical field
The present invention relates to widely used auxiliary welding material in electronic assemblies manufacturing process, relate in particular to a kind of weld-aiding cream body of being devoted to environmental protection development, belong to the wlding material formula field that helps.
Background technology
The international and domestic environmental protection rules such as lead-free and halogen-free have brought huge innovation to impact to whole electronics manufacturing, and environmental protection, energy-saving low-carbon become electronics process industry future developing trend gradually, and environmental protection electronic material has become manufacturing first-selection.
There is the common weld-aiding cream using in splicer's skill by leadless weld-aiding cream, to be substituted gradually.And leadless weld-aiding cream helps weldering performance in order to improve it, improve and help weldering effect, some have the active additive of harm to realize to environment often to adopt increase.Yet when improving welding performance, solvent evaporates can not be ignored to the health harm that a line user brings in weld-aiding cream, add that follow-up weld-aiding cream residue is used the problems such as potential risk of bringing also to cause the concern of manufacturing industry to the product later stage.New green environment protection weld-aiding cream is the basis of further development of new solder(ing) paste, so numerous electronic material manufacturers are all updating its effective proportioning of exploration, promote low-residual separately, new varieties that toxicity is low, to guarantee that product has stronger life on market separately.
Summary of the invention
Object of the present invention is intended to propose a kind of unleaded green weld-aiding cream, to guaranteeing that weld-aiding cream meets the restriction requirement of environmental regulation, postwelding residue excellent insulation performance when the weld job under certain reactive conditions; And can meet SnAg system, Sn(Ag) Bi system, SnAgCu system, Sn(Ag) welding requirements of the lead-free solder such as Zn system.
The technical scheme that the present invention realizes above-mentioned purpose is: a kind of unleaded green weld-aiding cream, it is characterized in that comprising by the component of mass percent: rosin matrix 35%-40%, solvent 52.5%-60%, activator 4.0%-5.5%, surfactant 0.3%-0.5% and the auxiliary additive 0.7%-1.5% that joins, wherein said rosin matrix is Foral, water-white rosin, newtrex or wherein appoint both a certain proportion of composite rosin, described solvent is ethanol, isopropyl alcohol, butyl glycol ether, a kind of in diethylene glycol (DEG) or wherein two or more complex solvent, described activator for to volatilize at pb-free solder temperature, the organic acid of postwelding noresidue, the described auxiliary additive of joining is selected from thixotropic agent, curing agent, corrosion inhibiter, one or more in flavor enhancement are composite.
Further, described activator is aromatic acid or aliphatic organic acid.
Further, described surfactant is OP-10 or TX-10.
Further, above-mentioned unleaded green weld-aiding cream comprises by the component of mass percent: the composite solvent obtaining of rosin matrix 40%, butyl glycol ether 30% and diethylene glycol (DEG) 22.7%, activator 5.5%, OP-10 0.5%, rilanit special 0.3%, ethylenediamine 0.8% and menthol 0.2%, wherein rosin matrix be newtrex, water-white rosin by the composite rosin of 2:8, described activator is that elaidic acid, ethanedioic acid, SA are by the composite activator of 1:2:2.5.
Further, above-mentioned unleaded green weld-aiding cream comprises by the component of mass percent:: rosin matrix 35%, isopropyl alcohol 60%, activator 3.5%, TX-10 0.3%, rilanit special 0.6%, BTA 0.1% and ethylenediamine 0.5%, wherein rosin matrix be Foral, water-white rosin by the composite rosin of 3:4, described activator is that citric acid, butanedioic acid, pimelic acid are by the composite activator of 2:0.5:1.
The development of weld-aiding cream of the present invention and application, compare to existing this type of and help wlding material to have outstanding technological merit, shows as: it is halogen contained compound not, environmental protection, can significantly improve the residual insulaion resistance of postwelding, promote wettingly simultaneously, that improves scaling powder helps weldering performance.Weld-aiding cream production, transportation, storage and safety in utilization are good.Through testing evaluation, this weld-aiding cream wetability is good, and the rate of spread is all greater than 80%, and postwelding insulating properties meet L-type scaling powder requirement in IPC/J-STD-004B, can meet the requirement of ordinary consumption electronic product soldering reliability.
Accompanying drawing explanation
Fig. 1 is the preparation process schematic diagram of the unleaded green weld-aiding cream of the present invention.
The specific embodiment
The present invention is directed to current to the requirement of whole electronic manufacturing industry environmental protection day by day promote and current weld-aiding cream material aspect at the wretched insufficiency aspect safety and environmental protection, innovation has proposed a kind of unleaded green weld-aiding cream.Adopt composite rosin as the matrix of weld-aiding cream, guarantee postwelding residue insulating properties; Use weak organic acid as active additive, when assurance is active, can meet environmental regulation restriction requirement.This weld-aiding cream helps weldering property good, has both possessed scaling powder in existing solder(ing) paste a little, meets again the requirement of International Environmental Protection rules simultaneously, can meet SnAg system, Sn(Ag) Bi system, SnAgCu system, Sn(Ag) welding requirements of the lead-free solder such as Zn system.
From substantive technical scheme of the present invention, this kind of unleaded green weld-aiding cream comprises by the component of mass percent: rosin matrix 35%-40%, solvent 52.5%-60%, activator 4.0%-5.5%, surfactant 0.3%-0.5% and the auxiliary additive 0.7%-1.5% that joins, wherein this rosin matrix can be Foral, water-white rosin or newtrex, can be also wherein to appoint both a certain proportion of composite rosin; This solvent is a kind of in ethanol, isopropyl alcohol, butyl glycol ether, diethylene glycol (DEG) or two or more complex solvents by a certain percentage wherein, this activator can be selected aromatic acid or other aliphatic organic acid, especially succinic acid, malic acid, benzoic acid, glutaric acid, adipic acid, elaidic acid etc., can select wherein several to carry out composite, this activator has enough chemisms, at pb-free solder temperature, can volatilize and postwelding noresidue, component insulation functional.
Above-mentioned surfactant is selected OP-10(APES), TX-10(NPE) or similar active agents, can reduce the surface tension of aqueous solvent, strengthen wetting power, improve welding machine and help weldering performance.
In addition, the above-mentioned auxiliary additive of joining is selected from the chemical compositions such as thixotropic agent, curing agent, corrosion inhibiter, flavor enhancement, or wherein several composite, to improve actual serviceability and product odour.
The preparation process of this unleaded green weld-aiding cream, comprises that step is described as follows as shown in Figure 1.
I, with cleaning glass or pottery as preparing container, solvent and rosin matrix are positioned in container, under the heating condition of 70-80 ℃, be stirred to completely and dissolve.
II, organic acid for activating agent is dissolved in surfactant under 40-50 ℃ of water-bath, stirs.
III, the above-mentioned dose of liquid that step II has been dissolved, under agitation slowly join the preparing in container of solvent and rosin matrix be housed.
IV, add additive (thixotropic agent, curing agent, corrosion inhibiter etc.) according to actual needs.
V, fully stirring, mix.
By the proportioning of several specific embodiments, introduce below, so that the weld-aiding cream technical scheme of this creation is easier to understand and realizes.
Embodiment mono-, and this proportioning is for containing weak organic acid active additive, the environmental protection weld-aiding cream of halogen-containing active material not, and concrete component is by each raw material weight percentage (wt%):
Newtrex 8%, water-white rosin 32%, butyl glycol ether 30%, diethylene glycol (DEG) 22.7%, elaidic acid 1.0%, ethanedioic acid 2.0%, SA 2.5%, OP-10 0.5%, rilanit special 0.3%, ethylenediamine 0.8% and menthol 0.2%, wherein newtrex, the composite formation rosin of water-white rosin matrix, elaidic acid, ethanedioic acid, the composite formation hybrid activator of SA.
Embodiment bis-, and this proportioning is for containing weak organic acid active additive, the environmental protection weld-aiding cream of halogen-containing active material not, and concrete component is by each raw material weight percentage (wt%):
Foral 15%, water-white rosin 20%, isopropyl alcohol 60%, pimelic acid 1.0%, citric acid 2.0%, butanedioic acid 0.5%, TX-10 0.5%, rilanit special 0.6%, hexamethylene diamine 0.5% and BTA (BTA) 0.1%, wherein Foral, the composite formation rosin of water-white rosin matrix, citric acid, butanedioic acid, the composite formation hybrid activator of pimelic acid.
Embodiment tri-, and this proportioning is for containing weak organic acid active additive, the environmental protection weld-aiding cream of halogen-containing active material not, and concrete component is by each raw material weight percentage (wt%):
Newtrex 9%, Foral 27%, butyl glycol ether 30%, isopropyl alcohol 28%, malic acid 1.0%, benzoic acid 2.0%, succinic acid 1.5%, OP-10 0.4%, rilanit special 0.3%, ethylenediamine 0.6% and menthol 0.2%, wherein newtrex, the composite formation rosin of Foral matrix, malic acid, benzoic acid, the composite formation hybrid activator of succinic acid.
To sum up can be expressly understood development and the application of weld-aiding cream of the present invention, comparing to existing this type of helps wlding material to have outstanding technological merit, show as: it is halogen contained compound not, environmental protection, can significantly improve the residual insulaion resistance of postwelding, promote wettingly, that improves scaling powder helps weldering performance simultaneously.Weld-aiding cream production, transportation, storage and safety in utilization are good.Through testing evaluation, this weld-aiding cream wetability is good, and the rate of spread is all greater than 80%, and postwelding insulating properties meet L-type scaling powder requirement in IPC/J-STD-004B, can meet the requirement of ordinary consumption electronic product soldering reliability.
Below embodiment by reference to the accompanying drawings describes, and is intended to be convenient to understand innovation essence of the present invention, but not with this, limits the claim protection domain of the multifarious embodiment of the present invention and requirement.In every case understand the present invention, and the equivalent structure carrying out according to above-described embodiment changes or member is replaced, and can realize the design of identical object and effect, all should be considered as the infringement to present patent application protection content.
Claims (6)
1. a unleaded green weld-aiding cream, it is characterized in that comprising by the component of mass percent: rosin matrix 35%-40%, solvent 52.5%-60%, activator 4.0%-5.5%, surfactant 0.3%-0.5% and the auxiliary additive 0.7%-1.5% that joins, wherein said rosin matrix is Foral, water-white rosin, newtrex or wherein appoint both a certain proportion of composite rosin, described solvent is ethanol, isopropyl alcohol, butyl glycol ether, a kind of in diethylene glycol (DEG) or wherein two or more complex solvent, described activator for to volatilize at pb-free solder temperature, the organic acid of postwelding noresidue, the described auxiliary additive of joining is selected from thixotropic agent, curing agent, corrosion inhibiter, one or more in flavor enhancement are composite.
2. unleaded green weld-aiding cream according to claim 1, is characterized in that: described activator is aromatic acid.
3. unleaded green weld-aiding cream according to claim 1, is characterized in that: described activator is aliphatic organic acid.
4. unleaded green weld-aiding cream according to claim 1, is characterized in that: described surfactant is OP-10 or TX-10.
5. unleaded green weld-aiding cream according to claim 1, it is characterized in that comprising by the component of mass percent: the composite solvent obtaining of rosin matrix 40%, butyl glycol ether 30% and diethylene glycol (DEG) 22.7%, activator 5.5%, OP-10 0.5%, rilanit special 0.3%, ethylenediamine 0.8% and menthol 0.2%, wherein rosin matrix be newtrex, water-white rosin by the composite rosin of 2:8, described activator is that elaidic acid, ethanedioic acid, SA are by the composite activator of 1:2:2.5.
6. unleaded green weld-aiding cream according to claim 1, it is characterized in that comprising by the component of mass percent: rosin matrix 35%, isopropyl alcohol 60%, activator 3.5%, TX-10 0.3%, rilanit special 0.6%, BTA 0.1% and ethylenediamine 0.5%, wherein rosin matrix be Foral, water-white rosin by the composite rosin of 3:4, described activator is that citric acid, butanedioic acid, pimelic acid are by the composite activator of 2:0.5:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394569.0A CN104148825B (en) | 2014-08-12 | 2014-08-12 | A kind of unleaded green weld-aiding cream |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410394569.0A CN104148825B (en) | 2014-08-12 | 2014-08-12 | A kind of unleaded green weld-aiding cream |
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| CN104148825A true CN104148825A (en) | 2014-11-19 |
| CN104148825B CN104148825B (en) | 2016-02-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537803A (en) * | 2016-02-24 | 2016-05-04 | 苏州龙腾万里化工科技有限公司 | Protective anti-corrosion no-clean flux |
| CN105945455A (en) * | 2016-06-29 | 2016-09-21 | 沈根来 | Soldering flux and preparation method thereof |
| CN106271217A (en) * | 2016-09-23 | 2017-01-04 | 工业和信息化部电子第五研究所华东分所 | A kind of disposable halogen-free scaling powder and low temperature solder stick |
| CN110653519A (en) * | 2019-10-23 | 2020-01-07 | 宁波新锦春新材料科技有限公司 | Formula and production process of environment-friendly soldering flux |
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| US4342607A (en) * | 1981-01-05 | 1982-08-03 | Western Electric Company, Inc. | Solder flux |
| US20010042775A1 (en) * | 1999-12-03 | 2001-11-22 | Sanyogita Arora | Soldering flux |
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| CN101585118A (en) * | 2009-03-09 | 2009-11-25 | 郴州金箭焊料有限公司 | Soldering flux for low temperature lead-free soldering paste |
| CN102794582A (en) * | 2012-08-15 | 2012-11-28 | 北京工业大学 | Soldering flux matched with high-melting-point solder and preparation method thereof |
| CN103111773A (en) * | 2012-12-13 | 2013-05-22 | 郴州金箭焊料有限公司 | Scaling powder for lead-free solder paste |
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2014
- 2014-08-12 CN CN201410394569.0A patent/CN104148825B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4342607A (en) * | 1981-01-05 | 1982-08-03 | Western Electric Company, Inc. | Solder flux |
| US20010042775A1 (en) * | 1999-12-03 | 2001-11-22 | Sanyogita Arora | Soldering flux |
| CN101462209A (en) * | 2009-01-16 | 2009-06-24 | 深圳市唯特偶化工开发实业有限公司 | Common resin type soldering flux without halogen suitable for low-silver leadless solder paste |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537803A (en) * | 2016-02-24 | 2016-05-04 | 苏州龙腾万里化工科技有限公司 | Protective anti-corrosion no-clean flux |
| CN105945455A (en) * | 2016-06-29 | 2016-09-21 | 沈根来 | Soldering flux and preparation method thereof |
| CN106271217A (en) * | 2016-09-23 | 2017-01-04 | 工业和信息化部电子第五研究所华东分所 | A kind of disposable halogen-free scaling powder and low temperature solder stick |
| CN110653519A (en) * | 2019-10-23 | 2020-01-07 | 宁波新锦春新材料科技有限公司 | Formula and production process of environment-friendly soldering flux |
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| Publication number | Publication date |
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| CN104148825B (en) | 2016-02-17 |
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