CN1046922A - Weldable polymer containing - Google Patents
Weldable polymer containing Download PDFInfo
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- CN1046922A CN1046922A CN 90101655 CN90101655A CN1046922A CN 1046922 A CN1046922 A CN 1046922A CN 90101655 CN90101655 CN 90101655 CN 90101655 A CN90101655 A CN 90101655A CN 1046922 A CN1046922 A CN 1046922A
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- Prior art keywords
- metal
- acid
- coated
- mixture
- carboxylic acid
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Abstract
The invention discloses electrically conductive composition with good welds, these compositions contain useful saturated monocarboxylic acid be coated with stain, be dispersed in metal and/or its alloy in the organic polymer matrix; The method for preparing these electrically conductive compositions is also disclosed.Another embodiment of the invention is the method that is coated with stain metal and/or its alloy with monocarboxylic acid.
Description
The present invention relates to generally be called the electrically conductive composition of thick polymeric coatings, the present invention is particularly relevant with the electrically conductive composition and the production method thereof that have shown the good welds ability.
Prior art disclose contain metal-powder or metallic flakes or with various resenes, for example composition of Resins, epoxy, resol and alkyd resin blended electroconductive resin shape.
United States Patent (USP) 3412043 discloses a kind of electroconductive resin shape composition, and it is by silver powder basically, and resin glue and dispersed well inert filler are formed.This invention depends on that the conduction cement of good electricity and physical properties and coating can be prepared this discovery by adding a large amount of inert fillers.
United States Patent (USP) 3030237 discloses a kind of good coating compound, it is made up of a kind of organic resin carrier and proper metal pigment basically, compare with common electrically conducting coating, when having good adhesion between the power equipment of this coating and its coated and being connected with printed circuit board (PCB) with electric performance characteristic, can use common silver soldering technology, common lead silver soldering is welded on the cured coating.
United States Patent (USP) 2280135 discloses a kind of conductive coating mixture, it is to be made of metalloids such as containing nickel, tin, bismuth, cadmium, chromium and silver, forms with the good plate of dispersiveness to be distributed in the liquid medium that contains film forming organic substance and a kind of volatile solvent.These coating are a kind of opaque paints, have low light reflective after being coated on glass and the analogous material.
United States Patent (USP) 4353816 discloses a kind of strong electrically conducting coating, it is a liquid form mixt, wherein contain weight percent and be 70～85% copper powder, at least weight percent be 15～30% by resol, a kind of resin selected in Resins, epoxy, alkyd resin and the xylene resin class and weight percent be 5% from anthracene, anthraldehyde acid, anthroic acid and two anthras (1,2-1 ', 2 ') additive reagent selected in the pyridazine.
Prior art composition shortcoming is that they are difficult for welding.
People are seeking thisly to be easy to weld and to utilize current material to obtain the resin compound of the conduction of the purpose of being asked with the cost of minimum always for a long time.
Make polymer-based carbon specifically have very high electroconductibility, it must contain metal.But the polymeric matrix that contains plain metal is difficult for welding.Those require the material of welding only could realize under the processing condition of meticulous control, and temperature and time control is too strict, impracticable again under general processing environment, use precious metal from gold and silver, to choose any one kind of them, but people know clearly that this method is uneconomic because these material prices are very high, general polymer conductor contains silver or gold really at present, but they are not to use common technology directly to weld.
Therefore, the objective of the invention is, the novel compositions that is easy to weld is provided.
Another object of the present invention is that the novel compositions that is easy to weld and contain base metal is provided.
Another object of the present invention is provide the composition that is easy to weld, and said composition to be unweldable in the past.
Being provided at the mixture that can weld under the very wide processing condition of scope is further purpose of the present invention.
A kind of method is provided, is used for preparing the mixture that is easy to weld and is still another purpose.Another object of the present invention provides a kind of method, with carboxylic acid metallizing and/or alloy.
Another object of the present invention is that the fabricated product that utilizes mixture of the present invention to produce is provided.
These purposes of the present invention are very clearly, and utilize the present invention to reach.On the one hand, the present invention includes a kind of improved electrically conductive composition of weldability that makes, it is metal and/or its alloy composition that is dispersed in after the stain in a kind of organic polymer by being coated with by saturated monocarboxylic acid or its composition.The present invention includes the method for this easy welding electrically conductive composition of preparation on the other hand, this method was meant before metal and/or alloy are dispersed in the organic polymer base-material, be earlier with saturated monocarboxylic acid and composition thereof dipping.The present invention also comprises the method that is coated with stain metal and/or its alloy with carboxylic acid or its composition on the one hand again.
Composition of the present invention is to constitute by be coated with the metal and/or its alloy that are dispersed in organic polymer matrix and the compound thereof after the stain with saturated monocarboxylic acid.
Any metal and/or its alloy (following metal one speech is used for comprising metal and/or its alloy) can be used in the composition of the present invention, and they comprise magnesium-yttrium-transition metal and non-magnesium-yttrium-transition metal but magnesium-yttrium-transition metal is better, and best metal is a nickel.
The most in a broad aspect, the present invention for size, shape or the form of employed metal in composition without limits.But metal is preferably Powdered, plate or sponge metal, and these terms are proficient in for those and are belonged to known to the person skilled in the art of the present invention and understand.
Than narrow sense say that the present invention should propose prescribed limits with regard to the size of employed metal.When mixture is coated with when steeping on the base plate by the silk screen print method operation, the upper limit of metal granularity is 125 microns, and best scope is 1～-10 micron.
In composition of the present invention, be coated with the stain metal with saturated monocarboxylic acid or its mixture.Unsaturated carboxylic acid is inoperative.Operable saturated carboxylic acid is represented by following molecular formula
Wherein R is that general formula is C
nH
2n+1Hydro carbons, n approximately is 10～18 integer.
Can use the saturated monocarboxylic acid that is fit to foregoing description, comprise lipid acid.These acid are equivalent to the material and the synthetic level material of technical grade.
What can use saturated monocarboxylic acid is capric acid, undeeanoic acid, positive tridecylic acid, TETRADECONIC ACID, positive 15, palmitic acid, nonadecanoic acid and laurostearic acid, preferably uses stearic acid, uses margaric acid better.
Mixture of the present invention also contains a kind of organic polymer base-material.This organic polymer base-material can for example be chosen in Resins, epoxy and the resol from type thermosetting resin.Theoretically, any resin needs only can spare in the scolder liquid under processing condition and is integral all and can uses, and promptly cementation is not cracked basically.
The resin that uses in example of the present invention is by being mixed with adjacent methoxycresol Novolac resin oh type and epoxy methoxyl methyl novolac resin oh type.Adjacent methoxycresol novolac resin (oh type) is the multifunctional resin by Xi Bagaiji (CHT/9490) supply.Epoxy methoxyl methyl novolac resin is a kind of poly-epoxide resin by adjacent methoxycresol resol and Epicholorohydrin prepared in reaction.The poly-epoxide resin of Sheng Chaning contains and is no more than two epoxy molecular radicals like this.This resin is supplied by Xi Bagaiji (ECN 1273).
The metal that the final composition of the present invention should have and the weight ratio of organic polymer matrix be about 5: 3～and 20: 1.In addition, the final composition weight ratio that should have saturated monocarboxylic acid and a metal be about 1: 1000～1: 30.Saturated monocarboxylic acid preferably is about 1: 100 with the ratio of the weight of metal.
Composition of the present invention can be by any means commonly used, and for example, silk screen print method, dipping, brushing or spraying etc. are coated with and steep on the bonding object.The product of being produced can be a veneer sheet, and particularly printed-wiring board (PWB) and coating mixture when composition is coated with when steeping printed-wiring board (PWB), preferably use silk screen print method.The upper limit that should remember the metal granularity in embodiment of the present invention is 125 microns, and optimum range is 1 micron～10 microns.Relate to this mixture and do not have other restriction to any other method of bonding object coating.In addition, this mixture can be applied on the bonding object of any kind, and in construction without any the special restriction of properties.But best this mixture uses on printed-wiring board (PWB).Usually coat-thickness is about 15 microns～50 microns.
Another embodiment of the invention is to be coated with the stain smithcraft with carboxylic acid or its mixture.This technology comprises: dissolving carboxylic acid or its mixture in solvent, in the generation solution of carboxylic acid and solvent, add metal then evaporating solvent remaining be to be coated with dry powder foam or the plate that steeped with carboxylic acid.
It is that on request percentage adds saturated carboxylic acid in metal in step separately that this metal precoating is handled, and its add-on is 0.1%～3%, is preferably 1%(weight).Though this coated technique is only relevant with saturated monocarboxylic acid, this method is fit to any other carboxylic acid and is coated with the stain metal and sets up.Metal can be taked any form preferably powder or plate.
Employed carboxylic acid must be able to dissolve in solvent.Though fat is operable, ethanol is best solvent.As long as carboxylic acid inside dissolves, any solvent can use.Although ethanol is isopropyl alcohol preferably, solvent is a diethylene glycol monobutyl ether ethanol ester preferably.Water can not be used as solvent and use.
Acid is added to after the solvent, carboxylic acid is convenient in the solution placement is dissolved in solvent.In solution, add metal with any common method then.Then solution is coated with the last layer carboxylic acid in placement for some time until metal.
Solution is placed under the room temperature and makes solvent evaporation then.Can use heating means but must careful operation in case fire or blast take place.The thing of residue is the metal that scribbles carboxylic acid.When it was in the end and is coated with state, the metal naked eyes under the in fact this state were unresolvable.
The present invention includes the easily method of weldering electrically conductive composition of preparation on the other hand.Before metal is dispersed in the organic polymer matrix, with saturated monocarboxylic acid or its mixture metal is coated with stain and prepares this mixture.
Organic polymer base-material, metal and saturated monocarboxylic acid are previously described as this piece specification sheets.Acid is equally coating as previously described still.
In the application of embodiment, the organic polymer matrix is dissolved in the solvent that contains the metal that scribbles saturated monocarboxylic acid, and as mentioned above, metal is dispersed in the resulting solution so.The mixture of Xing Chenging can be applied on the bonding object of its aftertreatment thus.The examples of solvents that can be used for being dissolved with organic polymer is a lipid, for example diethylene glycol monobutyl ether ethanol ester.The mixture that is applied to bonding outer object can pass through about 30 seconds to two hours processing of 125 °～about 200 ℃ of heating.
The weldability of metallic surface refers to the metallic surface and is soaked the profit ability by scolder.The metallic surface is easy of more the just easy more welding of the described surface of wetting.Any for purposes of the invention known welding process is posted and all can be used.
Example 1
Be coated with the method for stain metal
The stearic acid of 1/10th grams is dissolved in the isopropyl alcohol of five grams, adds dispersed well nickel powder then, and this mixture is then placed at room temperature.Make ethanol evaporation, at this moment metal-powder has been coated saturated carboxylic acid basically.
Example 2
Contain the preparation of the thick polymer film that is coated with the stain metal
By 20% adjacent methoxycresol novolac resin (oh type), 40% epoxy methoxyl methyl phenol novolac resin and 40% diethylene glycol monobutyl ether ethyl ester be placed on final mixture mixed preparing Resins, epoxy mixed solution on the agitator, in solid dissolves into solvent.
The three coated nickel powders of gram (being coated with method such as example one) are dispersed in the epoxy of a gram, and this paste is some all over the butteriness coating that obtains mixing well by three-roller.
This coating forms check pattern by being screen-printed to vitreous state epoxy type base plate then.This printing is placed on the interior solidification treatment coating of 160 ℃ of box baking ovens 30 minutes.Take out cooling from baking oven after, printing carries out the soldering flux processing with colophony type soldering flux (Kester 1544) and floods in the scolder that dissolves then.
The result is the solder coat of a level and smooth light basically in printed circuit pattern.
Example 3
Contain the preparation of the thick polymeric coatings that is not coated with the stain metal
Except metal saturated carboxylic acid of no use is coated with the stain, manufacturing procedure is fully identical with example 2 manufacturing procedures.Coating can not be welded basically, weldbonding material hardly on the coating.
Claims (7)
1, a kind ofly applies the technology of nickeliferous metal, it is characterized in that in solution, dissolving carboxylic acid, in the solution that is made into, add this metal and steam solvent then with carboxylic acid.
2, technology according to claim 1, wherein carboxylic acid is saturated monocarboxylic acid.
3, a kind of technology of handling matrix is characterized in that being dissolved with the organic polymer base-material in solvent; The nickeliferous metal that disperses to be coated with stain with saturated monocarboxylic acid forms a mixture; Described mixture is coated onto on the matrix, then curing mixture.
4, technology according to claim 3, wherein the organic polymer base-material is a Resins, epoxy.
5, technology according to claim 4, wherein solvent is an acetate of butyl carbitol.
6, technology according to claim 3, wherein this mixture is cured from 125 ℃ to 200 ℃ in temperature and handled 30 seconds to 2 hours.
7, technology according to claim 3, wherein saturated monocarboxylic acid are stearic acid or margaric acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85105651 CN1009734B (en) | 1984-04-12 | 1985-07-25 | Weldable thick polymeric coatings |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85105651 Division | 1985-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1046922A true CN1046922A (en) | 1990-11-14 |
Family
ID=4794614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101655 Pending CN1046922A (en) | 1985-07-25 | 1985-07-25 | Weldable polymer containing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1046922A (en) |
-
1985
- 1985-07-25 CN CN 90101655 patent/CN1046922A/en active Pending
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |