CN106832223B - The black paste generated in vitamin B6 industrial processes is in anticorrosive paint as the application of curing agent - Google Patents

Abstract

The present invention relates to the application of a kind of black paste produced in the industrial production process of vitamin B6 (hereinafter referred to as black paste) as the curing agent component of anti-corrosion coating, and the black paste produced in the industrial production process of vitamin B6 with the environment The oxygen resin reaction product is coated on the metal surface, solidifies and dries at a certain temperature to form a film to block chemical reagents to achieve the purpose of anticorrosion. It maximizes the effective benefits of industrial production and solves environmental problems at the same time.

Description

The black paste produced during the industrial production of vitamin B6 is used in anti-corrosion paint For the application of curing agent

technical field

The invention relates to the technical field of industrial waste recycling, in particular to the application of a black paste (hereinafter referred to as black paste) produced in the industrial production process of vitamin B6 as a curing agent component of an anti-corrosion coating.

Background technique

The phenomenon that metal is damaged by the chemical or electrochemical action of the surrounding environment medium is called metal corrosion. With the development of society and the advancement of industrial technology, the use of metals has become more and more extensive, and the corrosion of metals has spread to all fields of the national economy. According to the survey statistics of developed countries in the world, the annual direct losses caused by corrosion account for about 2.5% to 4.2% of the total value, and it is estimated that about 20% of the metal materials in the world cannot be recovered due to corrosion. Therefore, the corrosion and protection of metals have attracted widespread attention from all over the world. In order to reduce the loss of corrosion, people have taken many measures, but so far the most common, economical and practical protection measures are paint protection. Certain decorative effects and other characteristics are widely used.

Anti-corrosion methods for chemical equipment: (1) Environmental treatment method (2) Surface coating method (3) Electrical anti-corrosion method. The present invention mainly considers the method of surface coating to prevent corrosion.

Corrosion mechanisms can be roughly divided into three categories: chemical corrosion, physical corrosion, electrochemical corrosion

The anti-corrosion mechanism of anti-corrosion coatings mainly has three aspects: the passivation and corrosion inhibition of the substrate, the isolation and shielding effect and the formation of electrochemical protection

The passivation and corrosion inhibition effect on the substrate refers to changing the surface properties of the substrate, such as through the pigment in the paint coating, so that the substrate potential moves in the positive direction, so the metal begins to passivate, which can play a role purpose of retarding corrosion.

The isolation and shielding effect is to form a barrier layer on the surface of the metal substrate through the coating formed on the surface of the metal substrate, which can isolate and shield the contact between the medium such as oxygen, water and acid-base salts and the metal substrate, so as to achieve protection against the metal substrate. The purpose of substrate protection.

The electrochemical protection is formed by adding metal fillers with a more negative potential than the base metal, such as zinc powder or aluminum powder, to the anti-corrosion coating. When an electrolyte penetrates into the metal surface through the isolation shielding coating, the electronegativity The metal filler forms a battery with the metal matrix. The metal filler used as the anode first undergoes sacrificial dissolution, so that the metal matrix is protected, thereby achieving the effect of protecting the matrix. This type of coating is therefore called a sacrificial anti-corrosion coating.

Contents of the invention

The technical problem to be solved by the present invention is to provide a kind of application of polyamine polycarboxylate solid waste as curing agent in anticorrosion coating for the above-mentioned prior art, can effectively utilize the remaining waste residue of producing vitamin B6 in industrial production, and the metal Effective anti-corrosion of equipment.

The technical scheme adopted in the present invention is: the application of the black paste produced in the industrial production process of vitamin B6 as a curing agent in anticorrosion coatings.

According to the above plan: apply the reaction product of black paste and epoxy resin produced in the industrial production process of vitamin B6 to the metal surface, and cure and dry at a certain temperature to form a film to block chemical reagents to achieve the purpose of anticorrosion.

According to the above scheme: the curing temperature is 120-150°C.

According to the above scheme: the curing time is 30-60 minutes.

According to the above scheme: the mass ratio of the black paste produced during the industrial production of the added vitamin B6 to the epoxy resin is 3:1 to 1:3.

According to the above scheme, it is characterized in that: the reaction temperature between the black paste produced in the vitamin B6 industrial production process and the epoxy resin is first heated at 50-90°C for 0.5-5h, and then raised to 60-200°C for 0.5-3h.

One of the specific schemes is: add black paste and 1,2-propylene glycol in the reaction vessel, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the reaction container according to the mass ratio of black paste and epoxy resin at 1:1. In the container, stir in an oil bath at 90°C for 2 hours, increase the temperature to 180°C and stir for 1 hour, and wait until the viscosity is suitable for use.

The beneficial effects of the invention are aimed at resource reuse of vitamin B6 waste residues and effective anticorrosion of metals, improving the effective income of industrial production and solving environmental protection problems at the same time.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example 1

Add a certain quality of black paste (the black paste produced in the vitamin B6 industrial production process, mainly polyamine polycarboxylate solid waste) and 1,2-propylene glycol in a four-necked flask, after the black paste is completely dissolved, follow the The mass ratio of black paste to epoxy resin is 1:1, then add the corresponding quality of epoxy resin to the four-necked flask, stir in an oil bath at 90°C for 2h, raise the temperature to 180°C and stir for 1h, until the viscosity is suitable use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 7d, 8d and 9d respectively.

Example 2

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 9d respectively.

Example 3

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 8d, 9d and 9d respectively.

Example 4

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 7d, 9d and 9d respectively.

Example 5

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 10d and 10d respectively.

Example 6

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 9d respectively.

Example 7

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 8d and 8d respectively.

Example 8

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 10d and 9d respectively.

Example 9

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 9d respectively.

Example 10

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 9d respectively.

Example 11

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 10d respectively.

Example 12

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 9d respectively.

Example 13

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 10d respectively.

Example 14

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, 10d and 10d respectively.

Example 15

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 10d, 10d and 10d respectively.

Example 16

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is 9d, 9d and 10d respectively.

Example 17

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, 10d and 10d respectively.

Example 18

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 19

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 20

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 21

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 22

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 23

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 24

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 25

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 26

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 27

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding quality of epoxy resin to the four-necked flask according to the mass ratio of black paste to epoxy resin: 1; 3 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 30 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 28

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 29

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 30

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 50°C for 2h, increased the temperature to 60°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 40 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 31

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 32

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 33

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 50 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 34

Add a certain quality of black paste and 1,2-propylene glycol into the four-necked flask, and after the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin 1:1 , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 35

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:2. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Example 36

Add a certain amount of black paste and 1,2-propylene glycol into the four-necked flask. After the black paste is completely dissolved, add the corresponding mass of epoxy resin to the four-necked flask according to the mass ratio of black paste and epoxy resin: 1:3. , stirred in an oil bath at 90°C for 2h, raised the temperature to 180°C and stirred for 1h, until the viscosity was suitable for use. Put the prepared mixture on the polished, washed and dried tinplate sheet, and use the applicator to quickly and evenly paint on the tinplate sheet in the vertical and horizontal directions. The thickness of the coating film is 125 μm, and then place the iron sheet Dry in an oven for 60 minutes. After the coating film is dry, soak 2/3 of the coating film in 10% HCl, 30% NaOH and 30% NaCl solution to observe the change of the coating film. The anticorrosion time in HCl, NaOH and NaCl is >10d, >10d and >10d respectively.

Claims (1)

1. the black paste containing the more carboxylic substances of polyamines generated in vitamin B6 industrial processes is in anticorrosive paint It is to contain the more carboxylic substances of polyamines by what is generated in vitamin B6 industrial processes as the application of epoxy curing agent Black paste and epoxy resin reaction product be applied to metal surface, the added vitamin B6 industrial production mistake of reaction The black paste containing the more carboxylic substances of polyamines generated in journey is 3 with epoxy resin mass ratio:1~1:3, in certain temperature The lower solidification drying and forming-film of degree obstructs chemical reagent to reach corrosion-resistant purpose, is generated in the vitamin B6 industrial processes The black paste containing the more carboxylic substances of polyamines and epoxy resin reaction temperature be that 0.5-5h is first heated at 50-90 DEG C, carry High-temperature to 60-200 DEG C heating 0.5-3h；Solidification temperature is 120~150 DEG C, and hardening time is 30~60 min.