CN1752160A - Phosphoric acid doped polyphenylamine phosphate priming paint and preparing process thereof - Google Patents

Abstract

The invention is a phosphoric acid-doped polyaniline phosphating primer and a preparation method thereof. The primer provided by the invention includes two components, A and B, which use phosphoric acid doped polyaniline conductive polymers with aluminum tripolyphosphate and various phosphate antirust pigments to replace traditional tetrabasic zinc chromate, A new type of phosphating primer can be formulated with polyvinyl butyral resin, or a phosphating primer with in-situ polymerization to form phosphoric acid-doped polyaniline can be formed directly with small molecular aniline instead of polyaniline. All paints have excellent film adhesion and antirust properties. The primer provided by the invention, as a thin coating, has excellent coating film adhesion and antirust performance. Therefore, it can be used in conjunction with various anti-corrosion coatings to further enhance the anti-corrosion protection ability of the coating film. In addition, the primer provided by the invention is easy to prepare, suitable for industrial production and easy to popularize.

Description

A kind of phosphoric acid doped polyaniline phosphating primer and preparation method thereof

technical field

The invention relates to the field of materials, in particular to a phosphoric acid-doped polyaniline phosphating primer and a preparation method thereof.

Background technique

As we all know, polyaniline (PANI) has low intrinsic conductivity and good conductivity in acid-doped state. It is a new type of conductive polymer material. The acid-doped state is also called polyaniline salt. The development of polyaniline anti-corrosion Coating has become a new application field of polymer conductive materials, and it is also a new hot spot in the field of coating development and research in recent years.

The conductive polyaniline in the coating is conducive to the formation of a stable metal oxide passivation film on the steel surface, giving anodic protection, and also promoting the cathodic reaction (reduction of oxygen) to occur on the surface of the polyaniline primer layer, making the steel surface The anodic reaction on the surface is separated from the cathodic reaction, which prevents the pH increase of the steel surface and makes the coating less prone to cathodic stripping.

At present, polyaniline is commonly used as dopants such as hydrochloric acid and dodecylbenzenesulfonic acid. However, if these doped polyanilines are used with general coating resins to prepare anti-corrosion coatings, there will always be premature large-scale corrosion, and hydrochloric acid doping The agent will be gradually evaporated and lost; if a thin coat of pre-coated primer is formulated, more serious large-area rust will occur.

CN1243852A introduces "the preparation method of conductive polyaniline solvent-free anticorrosion coating", this method uses intrinsic state polyaniline/aliphatic polyamine solution as the mixed curing agent of epoxy resin, obtains a kind of new-style solvent-free, pollution-free anticorrosion coating Coatings, suitable for anti-corrosion coatings for ships.

CN1358812A introduces "a preparation process of polyaniline anticorrosion coating", which is to mix epoxy resin with polyaniline and diluent, and cure at room temperature with phenalkamine and polyamide. The resulting coating has high hardness and excellent wear resistance, and can protect the metal from corrosion by forming a passive film after the coating is scratched.

CN1401718A has introduced " the preparation technology of polyaniline anticorrosion coating ", and it is first conventional filler, as the micropowder or the nanopowder of silicon dioxide, titanium dioxide, montmorillonite, aluminum oxide, polyvinyl chloride etc., carry out surface treatment, and then Its surface is polymerized in situ to form polyaniline-coated organic or inorganic fillers. The filler is dispersed and mixed with epoxy resin, solvent, defoamer, plasticizer, etc. to obtain a high hardness and wear-resistant two-component polyaniline anticorrosion coating. The content of polyaniline in this filler is very low, the synthesis process is simple and it does not need to be dissolved for direct application, so it is convenient to use and extremely low in cost.

CN1429258A introduces "corrosion-resistant coating", which is a two-component coating containing non-conductive polyaniline, primary amine curing agent, and curable resin. The coating solution of the invention is stable for a long time, and the coating composition has a good anti-corrosion effect even at an extremely low polyaniline concentration.

CN1528845A introduces "water-based metal anticorrosion coating", which is to carry out condensation reaction with aniline copolymer with carboxyl group on the molecular chain and aliphatic polyamine, through -CO ₂ H and the amino condensation in aliphatic polyamine, the fat The polyaniline/aliphatic polyamine condensate-type epoxy resin curing agent that can be dissolved in water is prepared by grafting the polyaniline polyamine to the polyaniline molecular chain, and the curing agent is compounded with the water-based epoxy resin, thereby Obtain a metal anticorrosion coating with low curing temperature and meet the requirements of green chemistry. It can be applied to the anticorrosion of ships, containers, offshore oil platforms, nuclear power plants and other fields.

CN1385486A introduces "polyaniline coating composition", which contains polyaniline particles with a polymer core containing strong acid groups and an attached polyaniline shell, and the coating prepared by it can endow metal substrates with corrosion resistance. Also provided are a method for preparing polyaniline particles and a product including a coating prepared from the coating composition.

CN1215744A has introduced " the preparation method of conductive polyaniline antifouling and anticorrosion coating ", and this invention takes organic solvent or water as medium, adopts functionalized protonic acid to prepare conductive polyaniline dispersion liquid as dopant, and epoxy resin, Polyurethane, chlorinated rubber and other copolymers or water-soluble silicate, alcohol-soluble partially hydrolyzed orthosilicate, cuprous oxide, etc. are blended to prepare conductive coatings. The conductivity of the coating remained stable for more than 1 year in the marine environment. It can be used as anti-fouling coating for ships, and can also be used as anti-corrosion coating for ships.

Contents of the invention

The technical problem to be solved by the present invention is to provide a phosphoric acid-doped polyaniline phosphating primer and a preparation method thereof. The thin coating of the pre-coating primer has excellent film adhesion and antirust performance.

The technical solution adopted by the present invention to solve its technical problems is as follows:

The phosphoric acid-doped polyaniline phosphating primer provided by the invention comprises two components, A and B.

Component A is made by grinding 10% polyvinyl butyral solution, aluminum tripolyphosphate, polyaniline doped with phosphoric acid, phosphate antirust pigment, talcum powder, and ethanol solvent, and its mass ratio is 10% polyvinyl alcohol In terms of butyral solution, phosphoric acid doped polyaniline is 0.1% to 5.0%, aluminum tripolyphosphate is 1.5% to 6.5%, phosphate antirust pigment is 2.0% to 4.5%, and talcum powder is 0.5% to 2.5%.

Component B is made up of 85% phosphoric acid, distilled water and alcohol solvent. The alcohol solvent is a 3:1 mixed solvent of ethanol and butanol.

The phosphoric acid doped polyaniline in component A has the following structural features:

A ^- : H ₂ PO ₄ ^- , HPO ₄ ^2- or PO ₄ ^3- .

The above-mentioned phosphoric acid-doped polyaniline phosphating primer provided by the invention has the following several preparation methods:

One is to use phosphoric acid doped polyaniline to form phosphoric acid doped polyaniline, and then use the conductive polymer of phosphoric acid doped polyaniline to cooperate with aluminum tripolyphosphate and phosphate antirust pigment, and then mix it with polyvinyl butyral resin Dubbed.

One is to use aniline to directly prepare a phosphoric acid-doped polyaniline phosphating primer. The method is: directly use small-molecule aniline to form a doped polyaniline at the same time as the film is formed by in-situ polymerization, so that the phosphoric acid generated in situ is doped. The conductive polymer of polyaniline and aluminum tripolyphosphate, phosphate antirust pigment and polyvinyl butyral resin form a good antirust coating film.

One is a phosphoric acid-doped polyaniline phosphating primer formulated by polyaniline composite zinc phosphate, aluminum tripolyphosphate and polyvinyl butyral resin.

Among them, the synthesis method of polyaniline composite zinc phosphate is: according to the molar ratio of aniline and phosphoric acid is 1: 1.5～4, the molar ratio of aniline and dichromate is 1: 0.2～0.4, the mass ratio of aniline and industrial zinc phosphate Mix aniline and distilled water at a ratio of 1:1 to 4, add industrial zinc phosphate antirust pigment, heat up to 60°C for 3 hours under continuous stirring, cool to room temperature, add phosphoric acid and distilled water, slowly add heavy Chromate oxidation solution, react at room temperature for 3 hours, filter with suction, wash and filter with distilled water 3 times, and dry under vacuum at 60°C for 24 hours.

The precoating primer provided by the invention, as a thin coating, has excellent coating film adhesion and antirust performance. Therefore, it can be used in conjunction with various anti-corrosion coatings to further enhance the anti-corrosion protection ability of the coating film. In addition, the primer provided by the invention is easy to prepare, suitable for industrial production and easy to popularize.

Detailed ways

The invention relates to a phosphoric acid-doped polyaniline phosphating primer and a preparation method thereof.

1. Phosphoric acid doped polyaniline phosphating primer

Its composition includes A and B two components,

Component A is made by grinding 10% polyvinyl butyral solution, aluminum tripolyphosphate, polyaniline doped with phosphoric acid, phosphate antirust pigment, talcum powder, and ethanol solvent, and its mass ratio is 10% polyvinyl alcohol In terms of butyral solution, phosphoric acid-doped polyaniline is 0.1%-5.0%, aluminum tripolyphosphate is 1.5%-6.5%, phosphate antirust pigment is 2.0%-4.5%, talcum powder is 0.5%-2.5%, and an appropriate amount of ethanol solvent.

Component B is made up of 85% phosphoric acid, distilled water and alcohol solvent. The alcohol solvent is a 3:1 mixed solvent of ethanol and butanol.

The phosphoric acid doped polyaniline in component A has the following structural features:

A ^- : H ₂ PO ₄ ^- , HPO ₄ ^2- or PO ₄ ^3- .

The above-mentioned phosphate antirust pigments can be industrial zinc phosphate, modified zinc phosphate, basic zinc phosphate, modified basic zinc phosphate, strontium phosphate, modified strontium phosphate, basic zinc phosphite, calcium modified basic phosphorous acid One of zinc and aluminum tripolyphosphate, or two, or a mixture of two or more.

2. Preparation of phosphoric acid-doped polyaniline phosphating primer

The composition of the phosphoric acid-doped polyaniline phosphating primer is mentioned above, and the preparation of the primer has the following methods.

Example 1. The method for preparing polyaniline doped with phosphoric acid:

(1) Phosphoric acid doped polyaniline is first used to form phosphoric acid doped polyaniline, and then the conductive polymer of phosphoric acid doped polyaniline is combined with aluminum tripolyphosphate and phosphate antirust pigment, and then mixed with polyvinyl butyral Resin is made into, promptly obtains described primer.

Specific steps are as follows:

Dissolve the polyvinyl butyral resin into a 10% resin solution with a 3:1 mixed solvent of ethanol and butanol; take 130g of the 10% polyvinyl butyral solution, 1.95-8.45g of aluminum tripolyphosphate, phosphoric acid doped poly 0.13-6.5g of aniline, 2.6-5.9g of phosphate anti-rust pigment, 0.6-3.3g of talcum powder, 150ml of ethanol solvent, grind to make component A;

Take 10 g of 85% phosphoric acid, 8 g of distilled water, and 120 ml of a 3:1 mixed solvent of ethanol and butanol to form component B.

When in use, mix component A and component B, and apply it on the surface of the steel plate to form a dry film of 8-10 μm.

(2) Synthesis of phosphoric acid doped polyaniline:

Phosphoric acid-doped polyaniline is directly synthesized by using phosphoric acid as a dopant and ammonium persulfate as an oxidizing agent. The ratio is 1:0.55~1.1, dissolve aniline with 0.1~1mol/L phosphoric acid solution, slowly add ammonium persulfate solution dropwise under stirring, react at 10~25℃ for 3~10 hours, filter with suction, and use 0.1~1mol/L The L phosphoric acid solution was washed and filtered three times, and dried under vacuum at 60-80°C for 24 hours.

The volume resistivity of phosphoric acid-doped polyaniline was measured by two-point method to be 2×10 ³ Ω·cm.

Example 2. The method of direct preparation with aniline:

Directly use small molecule aniline to form doped polyaniline through in-situ polymerization method at the same time of film formation, so that the conductive polymer of phosphoric acid doped polyaniline generated in situ can be combined with aluminum tripolyphosphate, phosphate antirust pigment and polyvinyl alcohol Butyral resin forms a coating of phosphoric acid doped polyaniline phosphating primer which has good rust protection properties.

The difference from Example 1 is that in component A, aniline is used instead of phosphoric acid to dope polyaniline, and a certain amount of chromic acid oxidant is added in component B. The chromic acid oxidizing agent includes: chromic acid, chromic anhydride, sodium dichromate, ammonium dichromate, potassium dichromate and the like.

Example 3. The method prepared with polyaniline composite zinc phosphate:

The method is as follows: polyaniline composite zinc phosphate is prepared with aluminum tripolyphosphate and polyvinyl butyral resin.

Among them, the synthesis method of polyaniline composite zinc phosphate is: according to the molar ratio of aniline and phosphoric acid is 1: 1.5～4, the molar ratio of aniline and dichromate is 1: 0.2～0.4, the mass ratio of aniline and industrial zinc phosphate Mix aniline and distilled water at a ratio of 1:1 to 4, add industrial zinc phosphate antirust pigment, heat up to 60°C for 3 hours under continuous stirring, cool to room temperature, add phosphoric acid and distilled water, slowly add heavy Chromate oxidation solution, react at room temperature for 3 hours, filter with suction, wash and filter with distilled water 3 times, and dry under vacuum at 60°C for 24 hours.

Above-mentioned dichromate can adopt sodium dichromate, ammonium dichromate, potassium dichromate one kind, or two kinds, or the mixture of two or more kinds.

Three. Prepare the specific example of phosphoric acid-doped polyaniline phosphating primer (hereinafter referred to as phosphating primer)

Example 1: Preparation of phosphating primer containing phosphoric acid doped polyaniline

Including components A and B, the preparation is as follows:

Component A: Take 130 grams of 10% polyvinyl butyral (polyvinyl butyral grade is BH-45, butyryl 43% to 48%) solution, 2.5 grams of aluminum tripolyphosphate (APW-1, Guangxi Nanning Jiangnan Fine Chemical Factory), 5.5 grams of phosphoric acid doped polyaniline, 4 grams of industrial zinc phosphate antirust pigment (Xindong Chemical Factory, Xinle City, Hebei), 2 grams of talcum powder and 150ml of ethanol were ground to a fineness of 40-50 μm.

Component B: Mix 10 grams of 85% phosphoric acid, 8 grams of distilled water, 90 ml of ethanol, and 30 ml of butanol.

Synthesis of phosphoric acid-doped polyaniline in component A: 40.2 g of (NH ₄ ) ₂ S ₂ O ₈ was dissolved for use. Add 14.9 grams of aniline to 640ml of O.8mol/L H ₃ PO ₄ solution to dissolve, add (NH ₄ ) ₂ S ₂ O ₈ solution dropwise at room temperature under stirring, control the reaction temperature below 25°C, and add the dropwise time for about 1 After the dropwise addition, continue to stir and react for 3.5 hours, then filter with suction after static, wash with 0.8mol/L H ₃ PO ₄ solution, repeat the washing with suction for three times, and dry in vacuum at 80°C for 24 hours.

Example 2: Preparation of phosphating primer containing phosphoric acid doped polyaniline

Replace the industrial zinc phosphate antirust pigment in example 1 with alkaline zinc phosphate.

Example 3: Preparation of phosphating primer containing phosphoric acid doped polyaniline

Replace the industrial zinc phosphate antirust pigment in example 1 with strontium phosphate.

Example 4: Preparation of phosphating primer containing phosphoric acid doped polyaniline

Replace the industrial zinc phosphate antirust pigment in example 1 with basic zinc phosphite.

Example 5: Preparation of phosphating primer containing phosphoric acid doped polyaniline

Replace the industrial zinc phosphate antirust pigment in Example 1 with modified basic zinc phosphite.

Example 6: Preparation of phosphating primer containing PANI composite zinc phosphate

Mix 5 grams of aniline and 100 ml of distilled water, add 10 grams of industrial zinc phosphate, heat up to 60°C under continuous stirring, heat for 3 hours, and then cool to room temperature.

Mix 26 grams of 85% phosphoric acid with 100 ml of distilled water, take 40 ml of phosphoric acid solution and add 8.04 grams of sodium dichromate hexahydrate to dissolve to obtain an oxidation solution. Mix the remaining phosphoric acid solution with the aniline-zinc phosphate solution, slowly add sodium dichromate oxidizing solution dropwise under continuous stirring, control the temperature below 25°C and add dropwise for 30 minutes, react for another 3 hours, filter with suction, and wash with distilled water 3 times. Get 1/5 of this product to replace the phosphoric acid doped polyaniline in the example 1 and the industrial zinc phosphate antirust pigment matching paint.

Example 7: Preparation of phosphating primer containing aniline

Component A: Take 130 grams of 10% polyvinyl butyral solution, 8 grams of aluminum tripolyphosphate, 2 grams of aniline, 4 grams of industrial zinc phosphate antirust pigment, 2 grams of talcum powder and 150ml of ethanol and grind until the fineness reaches 40 ~50 μm.

Component B: Mix 10 grams of 85% phosphoric acid, 3 grams of sodium dichromate, 8 grams of distilled water, 90 milliliters of ethanol, and 30 milliliters of butanol.

A and B two components are mixed and painted, and at the same time of film formation, in-situ polymerization forms doped polyaniline.

The rust resistance and adhesion of the phosphating primer of the present invention are compared below by comparative examples and attached tables.

Comparison 1:

Synthesis of polyaniline hydrochloride: 100.5 g of (NH ₄ ) ₂ S ₂ O ₈ was dissolved in 240 ml of 1mol/L HCl for use. Add 37.3 grams of aniline to 560ml of 1mol/L HCl solution to dissolve, add (NH ₄ ) ₂ S ₂ O ₈ solution dropwise at room temperature under stirring, control the reaction temperature below 25°C, dropwise for about 1 hour, and dropwise is complete Continue to stir and react for 3.5 hours, then filter with suction after resting, wash with 1mol/L HCl solution until no SO ₄ ^2- (tested with BaCl ₂ ), and vacuum dry at 80°C for 24 hours.

Preparation of phosphating primer containing polyaniline hydrochloride:

Component A: Take 130 grams of 10% polyvinyl butyral (polyvinyl butyral grade is BH-45, butyryl 43% to 48%) solution, 2.5 grams of aluminum tripolyphosphate (APW-1, Guangxi Nanning Jiangnan Fine Chemical Factory), 5.5 grams of polyaniline hydrochloride, 4 grams of industrial zinc phosphate antirust pigment (Xindong Chemical Factory, Xinle City, Hebei), 2 grams of talcum powder and 150ml of ethanol were ground to a fineness of 40-50 μm.

Component B: Mix 10 grams of 85% phosphoric acid, 8 grams of distilled water, 90 ml of ethanol, and 30 ml of butanol.

Contrast 2:

The phosphating primer was prepared by replacing the industrial zinc phosphate antirust pigment in comparison 1 with alkaline zinc phosphate.

Contrast 3:

The calcium-modified basic zinc phosphite was used to replace the industrial zinc phosphate antirust pigment in comparison 1 to prepare a phosphating primer.

Schedule Notes

Rust resistance evaluation: 5×12cmA3 cold-rolled steel plate is polished with sandpaper, and all phosphating primers are mixed with A and B components, and then coated with a dry film thickness of 8-10 μm. After drying, seal the edge with wax. Soak in 3% sodium chloride aqueous solution for 24 hours, and the rust resistance is expressed by the percentage of rusted area.

Adhesion evaluation: apply the phosphating primer on the tinplate sheet, and then apply a layer of green alkyd resin enamel after drying. After drying, use the circle method to measure the adhesion. Grade 1 is the best and Grade 7 is the worst.

The result shows: the novel phosphating primer that is prepared with phosphoric acid-doped polyaniline among the present invention, or directly replaces polyaniline with small molecular aniline and is made into the phosphating primer that has in-situ polymerization to form phosphoric acid-doped polyaniline, due to ingenious The doping effect of phosphoric acid and its phosphating effect in the primer are utilized, so the phosphating primer of the present invention has excellent film adhesion and antirust performance in the thin coating precoat primer. Please refer to the accompanying table. In terms of rust resistance and adhesion, the phosphating primer of the present invention is superior to the existing polyaniline hydrochloride primer technology.

schedule

Comparison of rust resistance and adhesion example Antirust Pigment Characteristics Corrosion area/% Adhesion/level 1 Phosphoric acid doped polyaniline, industrial zinc phosphate 50 3 2 Phosphoric acid doped polyaniline, basic zinc phosphate 1 1～2 3 Phosphoric acid doped polyaniline, strontium phosphate 10 2 4 Phosphoric acid doped polyaniline, basic zinc phosphite 1 1 5 Phosphoric acid doped polyaniline, calcium modified basic zinc phosphite 0 1 6 PANI complex zinc phosphate 30 2 7 Aniline in situ polymerization 0～1 1 Contrast 1 Polyaniline hydrochloride, industrial zinc phosphate 60 4 Contrast 2 Polyaniline hydrochloride, basic zinc phosphate 30 3 Contrast 3 Polyaniline hydrochloride, calcium modified basic zinc phosphite 40 3

Claims (9)

1. priming paint, its composition comprises A, B two components, and the B component is made into by 85% phosphoric acid, distilled water and alcoholic solvent, and alcoholic solvent is 3: 1 ethanol and a butanols mixed solvent, it is characterized in that a kind of phosphoric acid doped polyphenylamine phosphate priming paint,

The A component is ground by polyvinyl butyral acetal solution, aluminium triphosphate, phosphate-doped polyaniline, phosphoric acid salt rust-stabilising pigment, talcum powder and alcohol solvent and is made into, its quality proportioning is by 10% polyvinyl butyral acetal solution, phosphate-doped polyaniline 0.1%～5.0%, aluminium triphosphate 1.5%～6.5%, phosphoric acid salt rust-stabilising pigment 2.0%～4.5%, talcum powder 0.5%～2.5%

The constitutional features of phosphate-doped polyaniline is as follows:

A ^-: be H ₂PO ₄ ^-, HPO ₄ ^2-Or PO ₄ ^3-

2. priming paint according to claim 1, it is characterized in that: the phosphoric acid salt rust-stabilising pigment adopts a kind of in industrial phosphoric acid zinc, modified zinc phosphate, alkaline phosphatase zinc, modified alkaline zinc phosphate, strontium phosphate, modified phosphate strontium, alkaline zinc phosphite, calcium modified alkaline zinc phosphite and the aluminium triphosphate, perhaps two kinds, perhaps two or more mixtures.

3. the preparation method of a priming paint, its composition comprises A, B two components, the B component is made into by 85% phosphoric acid, distilled water and alcoholic solvent, alcoholic solvent is 3: 1 ethanol and a butanols mixed solvent, it is characterized in that the A component forms phosphate-doped polyaniline with phosphate-doped polyaniline, utilize the electroconductive polymer of phosphate-doped polyaniline to cooperate again, be made into phosphoric acid doped polyphenylamine phosphate priming paint with polyvinyl butyral resin then with aluminium triphosphate, phosphoric acid salt rust-stabilising pigment

The A component is ground and is made into by 10% polyvinyl butyral acetal solution, aluminium triphosphate, phosphate-doped polyaniline, phosphoric acid salt rust-stabilising pigment, talcum powder, alcohol solvent, its quality proportioning is by 10% polyvinyl butyral acetal solution, phosphate-doped polyaniline 0.1%～5.0%, aluminium triphosphate 1.5%～6.5%, phosphoric acid salt rust-stabilising pigment 2.0%～4.5%, talcum powder 0.5%～2.5%.

4. according to the preparation method of the described priming paint of claim 3, it is characterized in that phosphate-doped polyaniline is made by following chemical synthesis process:

By the mol ratio of aniline and phosphoric acid be 1: 1.5～4, the mol ratio of aniline and ammonium persulphate is 1: 0.55～1.1 ratio, aniline is dissolved with 0.1～1mol/L phosphoric acid solution, stir down, slowly drip ammonium persulfate solution, 10～25 ℃ of reactions 3～10 hours, suction filtration is with 0.1～1mol/L phosphoric acid solution filter wash 3 times, 60～80 ℃ of vacuum-drying 24 hours

The constitutional features of phosphate-doped polyaniline is as follows:

A ^-: be H ₂PO ₄ ^-, HPO ₄2 ^-Or PO ₄3 ^-

5. the preparation method of a priming paint, its composition comprises A, B two components, the B component comprises 85% phosphoric acid, distilled water and alcoholic solvent, it is characterized in that directly preparing phosphoric acid doped polyphenylamine phosphate priming paint with aniline, its method is: directly simultaneously form doped polyaniline by situ aggregation method in film forming with small molecules aniline, make the electroconductive polymer and the aluminium triphosphate of the phosphate-doped polyaniline that generates on the spot, phosphoric acid salt rust-stabilising pigment and polyvinyl butyral resin form the coating of phosphoric acid doped polyphenylamine phosphate priming paint

The A component is ground and is made into by 10% polyvinyl butyral acetal solution, aluminium triphosphate, aniline, phosphoric acid salt rust-stabilising pigment, talcum powder, alcohol solvent, its quality proportioning is by 10% polyvinyl butyral acetal solution, aniline 0.1%～3.0%, aluminium triphosphate 1.5%～6.5%, phosphoric acid salt rust-stabilising pigment 2.0%～4.5%, talcum powder 0.5%～2.5%

The B component also comprises chromic acid class oxygenant, and the mol ratio of itself and aniline is 0.2～0.6: 1; Alcoholic solvent is 75: 25～50: 50 ethanol and a butanols mixed solvent.

6. according to the preparation method of the described priming paint of claim 5, it is characterized in that chromic acid class oxygenant comprises: a kind of in chromic acid, chromic anhydride, sodium dichromate 99, ammonium dichromate, the potassium bichromate, perhaps two kinds, perhaps two or more mixtures.

7. according to the preparation method of claim 3 or 5 described priming paint, it is characterized in that the phosphoric acid salt rust-stabilising pigment adopts a kind of in industrial phosphoric acid zinc, modified zinc phosphate, alkaline phosphatase zinc, modified alkaline zinc phosphate, strontium phosphate, modified phosphate strontium, alkaline zinc phosphite, calcium modified alkaline zinc phosphite and the aluminium triphosphate, perhaps two kinds, perhaps two or more mixtures.

8. the preparation method of a priming paint is characterized in that being mixed with phosphoric acid doped polyphenylamine phosphate priming paint by polyaniline composite zinc phosphate and aluminium triphosphate and polyvinyl butyral resin,

Wherein, the synthetic method of polyaniline composite zinc phosphate is: by the mol ratio of aniline and phosphoric acid be 1: 1.5～4, the mol ratio of aniline and dichromate is 1: 0.2～0.4, the mass ratio of aniline and industrial phosphoric acid zinc is 1: 1～4 ratio, aniline, distilled water are mixed, add industrial phosphoric acid zinc rust-stabilising pigment, under continuously stirring, be warming up to 60 ℃ of heating 3 hours, be cooled to room temperature, add phosphoric acid and distilled water, stir down, slowly drip dichromate oxidation liquid, room temperature reaction 3 hours, suction filtration, with distilled water filter wash 3 times, 60 ℃ of vacuum-drying 24 hours.

9. the preparation method of described priming paint according to Claim 8 is characterized in that dichromate adopts a kind of in sodium dichromate 99, ammonium dichromate, the potassium bichromate, perhaps two kinds, and perhaps two or more mixtures.