CN108329793A - A kind of graphene is modified rust resisting pigment anti-corrosion primer and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of graphenes to be modified rust resisting pigment anti-corrosion primer, is prepared by following weight percent composition：Epoxy resin 18~30%, graphene slurry 5~15%, flake pigment 3~10%, rust resisting pigment 20~30%, filler 10~20%, dispersing aid 0.4~0.8%, diluent 20~30%.Its versatility with good mechanical performance and to a variety of base materials has good adhesive force for the carbon steel base material of zinc-plated, chromium plating and mild abrasion, and has excellent antiseptic property.

Description

A kind of graphene modified antirust pigment anticorrosion primer and preparation method thereof

technical field

The invention relates to the technical field of nano-polymer composite materials, in particular to a graphene-modified anti-rust pigment anti-corrosion primer and a preparation method thereof.

Background technique

Epoxy iron red primer is a traditional corrosion protection coating, which has a certain anti-corrosion effect on iron and its alloys. However, due to the limited anti-corrosion performance of its constituent materials, the actual protection effect is not outstanding. How to improve the anti-corrosion performance is a technical problem that needs to be solved urgently in this field.

Contents of the invention

In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a graphene modified antirust pigment anticorrosion primer, which has good mechanical properties and versatility to various substrates, and is suitable for galvanizing, chrome plating and mild Good adhesion to ground carbon steel substrates and excellent corrosion protection.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A kind of graphene modified antirust pigment anticorrosion primer, is prepared from following components by weight percentage:

Preferably, the epoxy resin is any one or more of E-44 epoxy resin, E-20 epoxy resin, and E-02 epoxy resin.

Preferably, the flake pigment is any one or both of mica powder, glass flakes, and flake aluminum powder; the antirust pigment is any one or more of iron red, zinc yellow, and strontium yellow .

Preferably, the filler is any one or more of talcum powder, lithopone, and precipitated barium sulfate.

Preferably, the anti-sedimentation aid is any one or more of organic bentonite and fumed silica.

Preferably, the diluent is any one or more of xylene, propylene glycol methyl ether acetate, and butanol.

Preferably, the graphene slurry is composed of graphene powder, dispersant, xylene and butanol, and the graphene solid content is 10%.

Preferably, in the graphene slurry, the graphene powder is 3-10 layers of high-purity graphene powder, the dispersant is 7163A dispersant, and the volume ratio of xylene and butanol is 4:1.

The present invention also relates to a preparation method of graphene modified antirust pigment anticorrosion primer, comprising:

S101. Preparation of graphene slurry: add the dispersant to a mixed solvent composed of xylene and butanol and stir evenly, then add graphene powder, and ultrasonically disperse after stirring to obtain the product;

S102. Preparation of other components: prepare epoxy resin, graphene slurry, flake pigment, antirust pigment, filler, anti-sedimentation aid and diluent according to the proportion;

S103. Mixing preparation: After mixing epoxy resin and diluent evenly, add flake pigments, anti-rust pigments, fillers, anti-sedimentation aids, graphene slurry and stir evenly, grind until the fineness reaches below 40 μm, and filter have to.

Further, in the step S101, the preparation of the graphene slurry is as follows: adding the dispersant to the mixed solvent composed of xylene and butanol and stirring evenly, then adding the graphene powder, stirring for 0.5-1 h, and the stirring speed is 250～350r/min, and then disperse with an ultrasonic disperser. The dispersing conditions are ultrasonic 8s, intermittent 20s, and the total ultrasonic time is 2h. When dispersing, it is cooled by circulating water to keep the slurry temperature at 25±3°C.

Compared with the prior art, the beneficial effects of the present invention are:

1. The present invention utilizes the pre-dispersion of graphene to prepare graphene slurry, which solves the problems of easy agglomeration of graphene, difficulty in dispersion, poor dispersion stability, etc., and ensures the good stability of graphene modified antirust pigment anticorrosion primer sex;

2. The present invention utilizes the excellent mechanical properties of graphene to enhance and toughen the coating, improving the mechanical properties of the coating;

3. The present invention utilizes the gaps between the large flake pigment and the small flake nano-material graphene to complement each other and fill each other to form a "labyrinth effect" to increase the barrier ability of the coating to the corrosive medium, thereby improving the anti-corrosion performance of the coating;

4. The graphene-modified anti-rust pigment anti-corrosion primer of the present invention has good adhesion to galvanized, chrome-plated and lightly polished carbon steel substrates, and has excellent anti-corrosion performance.

Detailed ways

The present invention will be further described in detail below in combination with specific embodiments.

Unless otherwise specified, the raw materials used in the following examples of the present invention are commercially available industrial supplies, which can be purchased through commercial channels.

The invention relates to a graphene-modified anti-rust pigment anti-corrosion primer, which is prepared from the following components in weight percent: 18-30% of epoxy resin, 5-15% of graphene slurry, and 3-10% of flake pigment , anti-rust pigment 20-30%, filler 10-20%, dispersing aid 0.4-0.8%, diluent 20-30%.

Preferably, the epoxy resin is any one or more of E-44 epoxy resin, E-20 epoxy resin, and E-02 epoxy resin. The flake pigment is any one or two of mica powder, glass flakes, and flake aluminum powder; the antirust pigment is any one or more of iron red, zinc yellow, and strontium yellow. The filler is any one or more of talcum powder, lithopone, and precipitated barium sulfate. The anti-sedimentation aid is any one or more of organic bentonite and fumed silica. The diluent is any one or more of xylene, propylene glycol methyl ether acetate, and butanol. The graphene slurry is composed of graphene powder, dispersant, xylene and butanol, and the graphene solid content is 10%. In the graphene slurry, the graphene powder is 3-10 layers of high-purity graphene powder, the dispersant is a 7163A type dispersant, and the 3-10 layers of high-purity graphene powder is independently produced by CNOOC Changzhou Paint Chemical Research Institute. Synthesis, 7163A type dispersant was synthesized by CNOOC Changzhou Paint Chemical Research Institute Co., Ltd., the volume ratio of xylene and butanol was 4:1.

Example 1

Preparation of graphene modified antirust pigment anticorrosion primer Q-1

1.1. Preparation of graphene slurry

Add 1g of 7163A type dispersant to a mixed solvent composed of 44g of xylene and butanol (the volume ratio of xylene to butanol is 4:1) and stir evenly, then add 5g of 3-10 layers of high-purity graphene powder, and stir 0.5h, the stirring speed is 300r/min, and then disperse with an ultrasonic disperser. The dispersing conditions are ultrasonic 8s, intermittent 20s, and the total ultrasonic time is 2h. When dispersing, cool with circulating water to keep the slurry temperature at 25±3℃ , to prepare graphene slurry for subsequent use.

Table 1. Graphene-modified anti-rust pigment anti-corrosion primer Q-1 distribution ratio of each component

1.2. Mixing preparation of graphene-modified anti-rust pigment anti-corrosion primer Q-1

According to the ratio in Table 1, after mixing the epoxy resin and diluent evenly, add flake pigments, anti-rust pigments, fillers, graphene slurry and anti-sedimentation aids, start stirring, the stirring speed is 400r/min, stir After 30 minutes, after mixing evenly, use a horizontal sand mill to grind until the fineness reaches below 40 μm, and pass through a 120-mesh filter to obtain the graphene-modified anti-rust pigment anti-corrosion primer Q-1.

Example 2

Preparation of graphene modified antirust pigment anticorrosion primer Q-2

2.1. Preparation of graphene slurry

Add 1.5g of 7163A type dispersant to a mixed solvent composed of 43.5g of xylene and butanol (the volume ratio of xylene to butanol is 4:1) and stir evenly, then add 5g of 3-10 layers of high-purity graphene powder , stirred for 1h, the stirring speed was 250r/min, and then dispersed with an ultrasonic disperser. The dispersion conditions were ultrasonic 8s, intermittent 20s, and the total ultrasonic time was 2h. When dispersing, it was cooled by circulating water to keep the slurry temperature at 25±3 ℃, the graphene slurry was prepared and set aside.

Table 2. Graphene modified anti-rust pigment anti-corrosion primer Q-2 distribution ratio of each component

2.2. Mixing preparation of graphene-modified anti-rust pigment anti-corrosion primer Q-2

According to the ratio in Table 2, after mixing the epoxy resin and diluent evenly, add flake pigments, anti-rust pigments, fillers, graphene slurry and anti-sedimentation aids, start stirring, the stirring speed is 400r/min, stir After 30 minutes, after mixing evenly, grind with a horizontal sand mill until the fineness reaches below 40 μm, and pass through a 120-mesh filter to obtain the graphene-modified anti-rust pigment anti-corrosion primer Q-2.

Example 3

Preparation of graphene modified antirust pigment anticorrosion primer Q-3

3.1. Preparation of graphene slurry

Add 0.5g of 7163A type dispersant to 44.5g of mixed solvent composed of xylene and butanol (the volume ratio of xylene to butanol is 4:1) and stir evenly, then add 5g of 3-10 layers of high-purity graphene powder , stirred for 1h, the stirring speed was 350r/min, and then dispersed with an ultrasonic disperser. The dispersion conditions were ultrasonic 8s, intermittent 20s, and the total ultrasonic time was 2h. When dispersing, it was cooled by circulating water to keep the slurry temperature at 25±3 ℃, the graphene slurry was prepared and set aside.

Table 3. Graphene modified anti-rust pigment anti-corrosion primer Q-3 distribution ratio of each component

3.2. Mixing preparation of graphene-modified anti-rust pigment anti-corrosion primer Q-3

According to the ratio in Table 3, after mixing the epoxy resin and diluent evenly, add flake pigments, anti-rust pigments, fillers, graphene slurry and anti-sedimentation aids, start stirring, the stirring speed is 400r/min, stir After 30 minutes, after mixing evenly, grind with a horizontal sand mill until the fineness reaches below 40 μm, and pass through a 120-mesh filter to obtain the graphene-modified anti-rust pigment anti-corrosion primer Q-3.

Example 4

Preparation of graphene modified antirust pigment anticorrosion primer Q-4

4.1. Preparation of graphene slurry

Add 1g of 7163A type dispersant to a mixed solvent composed of 44g of xylene and butanol (the volume ratio of xylene to butanol is 4:1) and stir evenly, then add 5g of 3-10 layers of high-purity graphene powder, and stir 1h, the stirring speed is 250r/min, and then disperse with an ultrasonic disperser. The dispersing conditions are ultrasonic 8s, intermittent 20s, and the total ultrasonic time is 2h. When dispersing, it is cooled by circulating water to keep the slurry temperature at 25±3°C. Make graphene slurry, standby.

Table 4. Graphene-modified anti-rust pigment anti-corrosion primer Q-4 distribution ratio of each component

4.2. Mixing preparation of graphene-modified anti-rust pigment anti-corrosion primer Q-4

According to the ratio in Table 4, after mixing the epoxy resin and the diluent evenly, add flake pigments, anti-rust pigments, fillers, graphene slurry and anti-sedimentation aids, start stirring, the stirring speed is 400r/min, and stir After 30 minutes, after mixing evenly, grind with a horizontal sand mill until the fineness reaches below 40 μm, and pass through a 120-mesh filter to obtain the graphene-modified anti-rust pigment anti-corrosion primer Q-4.

Example 5

Preparation of graphene modified antirust pigment anticorrosion primer Q-5

5.1. Preparation of graphene slurry

Add 1g of 7163A type dispersant to a mixed solvent composed of 44g of xylene and butanol (the volume ratio of xylene to butanol is 4:1) and stir evenly, then add 5g of 3-10 layers of high-purity graphene powder, and stir 1h, the stirring speed is 350r/min, and then disperse with an ultrasonic disperser. The dispersing conditions are ultrasonic 8s, intermittent 20s, and the total ultrasonic time is 2h. When dispersing, it is cooled by circulating water to keep the temperature of the slurry at 25±3°C. Make graphene slurry, standby.

Table 5. Graphene-modified anti-rust pigment anti-corrosion primer Q-5 distribution ratio of each component

5.2. Mixing preparation of graphene-modified anti-rust pigment anti-corrosion primer Q-5

According to the ratio in Table 5, after mixing the epoxy resin and diluent evenly, add flake pigments, anti-rust pigments, fillers, graphene slurry and anti-sedimentation aids, start stirring, the stirring speed is 400r/min, stir After 30 minutes, after mixing evenly, grind with a horizontal sand mill until the fineness reaches below 40 μm, and pass through a 120-mesh filter to obtain the graphene-modified anti-rust pigment anti-corrosion primer Q-5.

Example 6

Performance comparison test

The graphene-modified antirust pigment anticorrosion primer Q-1～Q-5 prepared by the embodiments of the present invention 1～5 and a kind of commercially available common epoxy iron red primer respectively prepare a paint film with a film thickness of 30 ± 5 μm And carry out detection, obtain the detection data comparison table 6 as follows:

Table 6. Test data comparison table

Can find out in conjunction with above table 6, under the condition of same paint film thickness, the general-purpose graphene-modified epoxy anticorrosion primer that preparation method obtains in the present invention has impact strength better than commercially available epoxy iron red primer, resistant to The salt spray property is far superior to the commercial epoxy iron red primer, and has a good promotion prospect.

Those skilled in the art can make various other corresponding changes and deformations according to the above-described technical solutions and concepts, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (10)

1. a graphene modified antirust pigment anticorrosion primer, is characterized in that, is prepared from by following weight percent component: 2. graphene modified antirust pigment anticorrosion primer as claimed in claim 1, is characterized in that, described epoxy resin is E-44 type epoxy resin, E-20 type epoxy resin, E-02 type Any one or several of epoxy resins. 3. Graphene modified antirust pigment anticorrosion primer as claimed in claim 1, is characterized in that, described flaky pigment is any one or both in mica powder, glass flake, flaky aluminum powder; The anti-rust pigment is any one or more of iron red, zinc yellow and strontium yellow. 4. Graphene modified antirust pigment anticorrosion primer as claimed in claim 1, is characterized in that, described filler is any one or more in talcum powder, lithopone, precipitated barium sulfate. 5. graphene modified antirust pigment anticorrosion primer as claimed in claim 1, is characterized in that, described anti-sedimentation aid is any one or more in organic bentonite, fumed silica. 6. Graphene modified antirust pigment anticorrosion primer as claimed in claim 1, is characterized in that, described diluent is any one or more in xylene, propylene glycol methyl ether acetate, butanol. 7. the graphene modified antirust pigment anticorrosion primer as claimed in any one of claims 1 to 6, is characterized in that, described graphene slurry is made up of graphene powder, dispersant, xylene and butanol, The graphene solids content was 10%. 8. graphene modified antirust pigment anticorrosion primer as claimed in claim 7, is characterized in that, in described graphene slurry, graphene powder is 3～10 layers of high-purity graphene powders, and described dispersant It is 7163A type dispersant, the volume ratio of xylene and butanol is 4:1. 9. the preparation method of graphene modified antirust pigment anticorrosion primer described in claim 8, comprising: S101. Preparation of graphene slurry: add the dispersant to a mixed solvent composed of xylene and butanol and stir evenly, then add graphene powder, and ultrasonically disperse after stirring to obtain the product; S102. Preparation of other components: prepare epoxy resin, graphene slurry, flake pigment, antirust pigment, filler, anti-sedimentation aid and diluent according to the proportion; S103. Mixing preparation: After mixing epoxy resin and diluent evenly, add flake pigments, anti-rust pigments, fillers, anti-sedimentation aids, graphene slurry and stir evenly, grind until the fineness reaches below 40 μm, and filter have to. 10. the preparation method of graphene modified antirust pigment anticorrosion primer as claimed in claim 9, it is characterized in that, in described step S101, the preparation of graphene slurry is specifically: adding dispersant to xylene and butyl Mixed solvent composed of alcohol and stir evenly, then add graphene powder, stir for 0.5-1h, stirring speed is 250-350r/min, and then disperse with ultrasonic disperser, the dispersion conditions are ultrasonic 8s, intermittent 20s, total ultrasonic time 2h, cooling with circulating water during dispersion to keep the slurry temperature at 25±3°C.