CN1286283A - Antirust precoating paint for printed circuit board - Google Patents
Antirust precoating paint for printed circuit board Download PDFInfo
- Publication number
- CN1286283A CN1286283A CN 99114401 CN99114401A CN1286283A CN 1286283 A CN1286283 A CN 1286283A CN 99114401 CN99114401 CN 99114401 CN 99114401 A CN99114401 A CN 99114401A CN 1286283 A CN1286283 A CN 1286283A
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- China
- Prior art keywords
- rosin
- antirust
- light
- circuit board
- printed circuit
- Prior art date
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Abstract
An antirust precoating paint for printed circuit board is prepared from light-colour different kinds of rosin (1-10%), polyvinyl acetal resin (1-5%) and organic solvent (90-95%). Its advantages are fast drying, firm adhesion and helping soldering.
Description
The present invention relates to a kind of novel antirust precoating paint of electronic industry printed-wiring board (PWB).
The Copper Foil of print circuit board surface, makes moist at easily oxidation, influences welding effect.At present, abroad the someone proposes to be dissolved in the organic solvent with common rosin and is applied to PCB surface as precoating paint, and Copper Foil is had provide protection.But the easy oxidation of common rosin influences welding property, and the precoating paint rate of drying is slow, influences production efficiency.
The object of the present invention is to provide a kind of novel antirust precoating paint, it makes with extra care rosin, and is composite and make, and it is fast to have a rate of drying, and it is moistureproof and anti-oxidant to form one deck, and the film of difficult drop-off.This film is easy to mix with the liquid soldering flux of rosinyl, help the weldering performance but also can improve, this antirust precoating paint and corresponding organic striping solvent have good intermiscibility, avoided direct use rosin effectively and the easy oxidation that produces, easily crystallization, easily pollute the plate face, easily produce repulsion with soldering flux and shadow to the welding effect various disadvantages.
The every performance of antirust precoating paint for printed circuit board provided by the invention, index all can satisfy the various welding technique requirements at the printed-wiring board (PWB) electronic component, and its quality index is as follows:
Outward appearance-light yellow liquid
Proportion-0.8000-0.8400/20 ℃
Viscosity-3.0-4.5 centipoise/28 ℃
Solid content-5-15% (WT)
Insulation resistance-5 * 10
12More than the Ω
The common one-level rosin of corrodibility-be lower than
Softening yield temperature-＞90 ℃
Invention is achieved in that antirust precoating paint for printed circuit board is to make corresponding staybelite, disproportionation rosin, maleated rosin by starex, gum resin or wood rosin through modified method, is 2666pa～5332pa with it in vacuum tightness; Temperature is under 220 ℃～280 ℃ the working conditions, to distill, and obtains pale rosin, light staybelite, light disproportionation rosin and light maleated rosin after refining, and is formulated with polyvinylacetal coating resin and organic solvent again.The polyvinylacetal coating resin can be commercially available polyvinyl formal, polyvinylacetal, polyvinyl butyral acetal, polyethylene first and second aldehyde that contract.Organic solvent can be with commercially available ethanol, butanols, acetone, ethyl acetate, benzene, toluene, chlorinated hydrocarbon.Its component proportions: (weight %) pale rosin class 1～10, polyvinylacetal coating resin 1～5, all the other are organic solvent.
The following stated embodiment describes the present invention in detail.
Embodiment 1
Antirust precoating paint for printed circuit board adopts commercially available hydrogenation starex through refining back gained light color oil slick staybelite 5%, polyvinyl formal class coating resin 2%, ethyl acetate 93%, through fully stirring dissolving fully, being applied on the printed-wiring board (PWB) is a kind of favorable protection layer.
Embodiment 2
Antirust precoating paint for printed circuit board adopts commercially available hydrogenation wood rosin through refining gained light color hydrogenation wood rosin 4%, polyvinylacetal coating resin 2%, acetone 94%, through fully stirring dissolving fully, being applied to printed-wiring board (PWB) is a kind of favorable protection layer.
Filming behind the product drying of the present invention is good with pure dissolubility rosinyl liquid flux intermiscibility, do not influence the direct wave soldering technology of using, this product is noncorrosive fully, and insulation resistance is very good, rapidly dry, in drying process, can not produce bubble, it is transparent to film, light, even, flexible.Has the excellent protection characteristic.
Behind the product drying of the present invention film and corresponding organic striping solvent has good intermiscibility.
Claims (4)
1. antirust precoating paint for printed circuit board, it is characterized in that making corresponding commercially available staybelite, disproportionation rosin, maleated rosin through modified method by starex, gum resin or wood rosin, again through distillation and the pale rosin that obtains, light staybelite, light disproportionation rosin, light maleated rosin and polyvinylacetal coating resin and organic solvent are formulated, its composition proportion is (weight %): pale rosin 1～10, polyvinylacetal coating resin 1～5, organic solvent 90～95.
2. antirust precoating paint for printed circuit board according to claim 1 is characterized in that pale rosin, light staybelite, light disproportionation rosin, light maleated rosin are is 2666pa～5332pa with commercially available starex, gum resin or wood rosin, staybelite, disproportionation rosin, maleated rosin in vacuum tightness respectively; Temperature is to distill under 220 ℃～280 ℃ the condition to make.
3. antirust precoating paint for printed circuit board according to claim 1 is characterized in that required polyvinylacetal coating resin, available commercially available polyvinyl formal, polyvinylacetal, polyvinyl alcohol butyraldehyde, polyvinyl formal acetal.
4. antirust precoating paint for printed circuit board according to claim 1 is characterized in that required organic solvent can be with commercially available ethanol, butanols, acetone, ethyl acetate, benzene, toluene, chlorinated hydrocarbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991144015A CN1142226C (en) | 1999-08-26 | 1999-08-26 | Antirust precoating paint for printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991144015A CN1142226C (en) | 1999-08-26 | 1999-08-26 | Antirust precoating paint for printed circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1286283A true CN1286283A (en) | 2001-03-07 |
| CN1142226C CN1142226C (en) | 2004-03-17 |
Family
ID=5277492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991144015A Expired - Fee Related CN1142226C (en) | 1999-08-26 | 1999-08-26 | Antirust precoating paint for printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142226C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819856A (en) * | 2010-04-15 | 2010-09-01 | 河南许绝电工绝缘材料有限公司 | Anti-explosion dehumidifying solvent for transformer and manufacturing method thereof |
| CN101892012B (en) * | 2009-05-18 | 2012-08-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Coating composition and steel composite material |
| CN111654977A (en) * | 2020-06-22 | 2020-09-11 | 广德众泰科技有限公司 | Method for manufacturing oxidation-resistant circuit board |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362924B (en) * | 2008-10-08 | 2010-12-29 | 中国林业科学研究院林产化学工业研究所 | Method for decolorization preparation of pale rosin by rosin containing non-decoloring agent |
-
1999
- 1999-08-26 CN CNB991144015A patent/CN1142226C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892012B (en) * | 2009-05-18 | 2012-08-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Coating composition and steel composite material |
| CN101819856A (en) * | 2010-04-15 | 2010-09-01 | 河南许绝电工绝缘材料有限公司 | Anti-explosion dehumidifying solvent for transformer and manufacturing method thereof |
| CN111654977A (en) * | 2020-06-22 | 2020-09-11 | 广德众泰科技有限公司 | Method for manufacturing oxidation-resistant circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1142226C (en) | 2004-03-17 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |