CN104575680A - Rosin-based organic carrier conductive silver paste - Google Patents

Abstract

The invention discloses rosin-based organic carrier conductive silver paste which is prepared from the following raw materials in parts by weight: 6 to 10 parts of rosin, 2 to 3 parts of stearamide, 1 to 2 parts of triethylene glycol di-2-ethylhexoate, 20 to 23 parts of acetone, 0.1 to 0.3 part of zinc oxide, 0.4 to 1 part of aluminium oxide, 0.3 to 0.4 part of ricinoleic acid, 0.1 to 0.3 part of ammonium metaborate, 0.3 to 1 part of casein, 1 to 2 parts of polyvinyl alcohol, 0.1 to 0.2 part of triallyl isocyanurate, 73 to 80 parts of coated silver powder, and 10 to 12 parts of lead-free glass powder. According to the rosin-based organic carrier conductive silver paste, the coated silver powder is formed by coating the surface of a polymer microsphere with nanometer silver powder uniformly and compactly, so that the dosage of precious metal silver powder and the production cost can be reduced, and the dispersibility and the stability of the nanometer silver powder are improved greatly.

Description

A kind of abietyl organic carrier conductive silver paste

Technical field

The present invention relates generally to conductive silver paste field, particularly relates to a kind of abietyl organic carrier conductive silver paste.

Background technology

Conductive silver slurry refers to and is printed on conduction stock, and making it the silver slurry having conduction current and get rid of accumulate static charge ability, is generally be imprinted on the non-conductive stocks such as plastics, glass, pottery or cardboard.Printing process is very wide, as silk screen printing, letterpress, flexographic printing, intaglio printing and offset printing etc. all can adopt.Then resistance, Solder resistance and rub resistance etc. are also different can to select different printing processes, thickness difference according to the requirement of thickness.This silver slurry has thick film mill base and resin type two kinds.The former is that the high temperature of binder burns till type with frit, the latter take synthetic resin as the low temperature drying of binder or the silk screen silver slurry of radiation-curable, and in conductive filler conductivity it is preferred that silver powder and copper powder, but cost is relatively high, therefore find through experiment, adopt silver-colored coated particle just can to effectively reduce cost as conductive filler, and its its conductivity is had no significant effect.

Summary of the invention

The object of the invention is just to provide a kind of abietyl organic carrier conductive silver paste.

The present invention is achieved by the following technical solutions:

A kind of abietyl organic carrier conductive silver paste, is characterized in that what it was made up of the raw material of following weight parts:

Rosin 6-10, saturated 18 phosphoamide 2-3, triethylene glycol two tricaprylate 1-2, acetone 20-23, zinc oxide 0.1-0.3, aluminium oxide 0.4-1, castor oil acid 0.3-0.4, ammonium metaborate 0.1-0.3, casein 0.3-1, polyvinyl alcohol 1-2, cyanacrylate 0.1-0.2, coated silver powder 73-80, lead-free glass powder 10-12;

Described coated silver powder is made up of the raw material of following weight parts:

Nano-sized iron oxide 4-6, lanthanum sulfate 0.1-0.2, deionized water 300-400, butyl acrylate 10-13, sodium carboxymethylcellulose 0.9-2, silane coupler KH560 0.06-0.1, benzoyl peroxide 0.01-0.02, ascorbic acid 45-60, locust bean gum 1-2, sodium tetraborate 0.1-0.14, silver nitrate 100-110;

By nano-sized iron oxide, butyl acrylate mixing, add 31-35%, the sodium carboxymethylcellulose of above-mentioned deionized water weight, benzoyl peroxide is added after stirring, reaction 6-10 hour is left standstill at 70-90 DEG C, add lanthanum sulfate, silane coupler KH560, magnetic agitation 10-15 minute, obtains nanoemulsions;

By locust bean gum, sodium tetraborate mixing, add the 20-30% of residue deionized water weight, drip ammoniacal liquor, adjustment PH is 6.8-7, adds ascorbic acid, stirs, obtain reducing solution;

The mixing of each raw material will be remained, stir, obtain oxidation solution;

Above-mentioned oxidation solution is added drop-wise in reducing solution, nanoemulsions is added after dropwising, rotating speed be 1200-1500rmp, temperature be 20-25 DEG C at dispersed with stirring 25-30 minute, after sedimentation 1-2 hour, supernatant is gone to get its sediment, wash 3-5 time with deionized water and ethanol, dry, abrasive dust.

The preparation method of described abietyl organic carrier conductive silver paste, is characterized in that comprising the following steps:

(1) by rosin, saturated 18 phosphoamide mixing, 4-10 minute is uniformly mixed at 60-65 DEG C, add the 70-80% of above-mentioned acetone weight, stir, add cyanacrylate, at 70-75 DEG C, be uniformly mixed 30-40 minute, add remaining acetone and triethylene glycol two tricaprylate, stir, obtain organic carrier;

(2) join in organic carrier by coated silver powder, mix, add each raw material of residue, high speed dispersion, send on three-roll grinder and mix, ground slurry granularity, to 8-15 micron, gets product.

Advantage of the present invention is:

The nano-silver powder that coated silver powder of the present invention is evenly and is densely coated on the surface of polymer microsphere, not only can reduce the consumption of noble metal silver powder, reduce production cost, also substantially increase dispersiveness and the stability of nano-silver powder simultaneously, adopt the mixing of locust bean gum, sodium tetraborate as dispersant, viscosity is low, is convenient to washing and filtering, good dispersion, not easily forms reunion;

Of the present invention by saturated 18 phosphoamides and rosin blending and modifying, the organic carrier modest viscosity obtained, mobility, wetability are good, can effectively reduce reunion, improve conductivity.

Embodiment

Embodiment 1

A kind of abietyl organic carrier conductive silver paste, is characterized in that what it was made up of the raw material of following weight parts:

Rosin 10, saturated 18 phosphoamides 3, triethylene glycol two tricaprylate 1, acetone 23, zinc oxide 0.3, aluminium oxide 1, castor oil acid 0.3, ammonium metaborate 0.3, casein 0.3, polyvinyl alcohol 2, cyanacrylate 0.2, coated silver powder 80, lead-free glass powder 12;

Described coated silver powder is made up of the raw material of following weight parts:

Nano-sized iron oxide 6, lanthanum sulfate 0.2, deionized water 400, butyl acrylate 13, sodium carboxymethylcellulose 0.9, silane coupler KH560 0.1, benzoyl peroxide 0.02, ascorbic acid 60, locust bean gum 1-2, sodium tetraborate 0.1, silver nitrate 100;

By nano-sized iron oxide, butyl acrylate mixing, add 35% of above-mentioned deionized water weight, sodium carboxymethylcellulose, after stirring, add benzoyl peroxide, reaction 10 hours are left standstill at 90 DEG C, add lanthanum sulfate, silane coupler KH560, magnetic agitation 15 minutes, obtains nanoemulsions;

By locust bean gum, sodium tetraborate mixing, add 30% of residue deionized water weight, drip ammoniacal liquor, regulate PH to be 7, add ascorbic acid, stir, obtain reducing solution;

The mixing of each raw material will be remained, stir, obtain oxidation solution;

Above-mentioned oxidation solution is added drop-wise in reducing solution, add nanoemulsions after dropwising, rotating speed be 1500rmp, temperature be 25 DEG C at dispersed with stirring 30 minutes, supernatant goes after 2 hours to get its sediment by sedimentation, 5 times are washed, dry, abrasive dust with deionized water and ethanol.

The preparation method of described abietyl organic carrier conductive silver paste, comprises the following steps:

(1) by rosin, saturated 18 phosphoamide mixing, 4 minutes are uniformly mixed at 65 DEG C, add 80% of above-mentioned acetone weight, stir, add cyanacrylate, at 75 DEG C, be uniformly mixed 40 minutes, add remaining acetone and triethylene glycol two tricaprylate, stir, obtain organic carrier;

(2) join in organic carrier by coated silver powder, mix, add each raw material of residue, high speed dispersion, send on three-roll grinder and mix, ground slurry granularity to 8 micron, gets product.

Performance test:

Without lump, in uniform state after stirring;

Fineness≤15 μm;

Adhesive force 4.7B;

Hardness 1H.

Claims (2)

1. an abietyl organic carrier conductive silver paste, is characterized in that what it was made up of the raw material of following weight parts:

Rosin 6-10, saturated 18 phosphoamide 2-3, triethylene glycol two tricaprylate 1-2, acetone 20-23, zinc oxide 0.1-0.3, aluminium oxide 0.4-1, castor oil acid 0.3-0.4, ammonium metaborate 0.1-0.3, casein 0.3-1, polyvinyl alcohol 1-2, cyanacrylate 0.1-0.2, coated silver powder 73-80, lead-free glass powder 10-12;

Described coated silver powder is made up of the raw material of following weight parts:

Nano-sized iron oxide 4-6, lanthanum sulfate 0.1-0.2, deionized water 300-400, butyl acrylate 10-13, sodium carboxymethylcellulose 0.9-2, silane coupler KH560 0.06-0.1, benzoyl peroxide 0.01-0.02, ascorbic acid 45-60, locust bean gum 1-2, sodium tetraborate 0.1-0.14, silver nitrate 100-110;

By nano-sized iron oxide, butyl acrylate mixing, add 31-35%, the sodium carboxymethylcellulose of above-mentioned deionized water weight, benzoyl peroxide is added after stirring, reaction 6-10 hour is left standstill at 70-90 DEG C, add lanthanum sulfate, silane coupler KH560, magnetic agitation 10-15 minute, obtains nanoemulsions;

By locust bean gum, sodium tetraborate mixing, add the 20-30% of residue deionized water weight, drip ammoniacal liquor, adjustment PH is 6.8-7, adds ascorbic acid, stirs, obtain reducing solution;

The mixing of each raw material will be remained, stir, obtain oxidation solution;

Above-mentioned oxidation solution is added drop-wise in reducing solution, nanoemulsions is added after dropwising, rotating speed be 1200-1500rmp, temperature be 20-25 DEG C at dispersed with stirring 25-30 minute, after sedimentation 1-2 hour, supernatant is gone to get its sediment, wash 3-5 time with deionized water and ethanol, dry, abrasive dust.

2. a preparation method for abietyl organic carrier conductive silver paste as claimed in claim 1, is characterized in that comprising the following steps:

(1) by rosin, saturated 18 phosphoamide mixing, 4-10 minute is uniformly mixed at 60-65 DEG C, add the 70-80% of above-mentioned acetone weight, stir, add cyanacrylate, at 70-75 DEG C, be uniformly mixed 30-40 minute, add remaining acetone and triethylene glycol two tricaprylate, stir, obtain organic carrier;

(2) join in organic carrier by coated silver powder, mix, add each raw material of residue, high speed dispersion, send on three-roll grinder and mix, ground slurry granularity, to 8-15 micron, gets product.