阅读说明：本技术 一种橡胶模具涂料及其使用方法 (Rubber mold coating and using method thereof ) 是由 尤秋林 于 2020-11-28 设计创作，主要内容包括：一种橡胶模具涂料,其特征在于：按质量份数由30-60份PTFE、20-40份环氧树脂、10-20份纳米级氧化物颗粒、5-10份硫酸钡、5-10份硫酸镁、5-10份滑石粉、1-5份硅烷偶联剂和20-40份有机溶剂组成,所述有机溶剂为三氯乙烯、苯乙烯、二甲苯或三乙醇胺其中的一种或几种的混合。本发明开公开了橡胶模具涂料的使用方法。与现有技术相比,本发明具有的有益效果是制备得到的涂料具有良好的耐酸碱性能,涂覆在橡胶模具表面使得橡胶模具具有一定耐酸碱性,并一定程度上提高了模具的耐摩擦性。(A rubber mold coating is characterized in that: the composite material consists of 30-60 parts of PTFE, 20-40 parts of epoxy resin, 10-20 parts of nano-scale oxide particles, 5-10 parts of barium sulfate, 5-10 parts of magnesium sulfate, 5-10 parts of talcum powder, 1-5 parts of silane coupling agent and 20-40 parts of organic solvent according to parts by weight, wherein the organic solvent is one or a mixture of more of trichloroethylene, styrene, xylene or triethanolamine. The invention discloses a use method of a rubber mold coating. Compared with the prior art, the invention has the beneficial effects that the prepared coating has good acid and alkali resistance, and the rubber mold has certain acid and alkali resistance and the friction resistance of the mold is improved to a certain extent when the coating is coated on the surface of the rubber mold.)

1. A rubber mold coating is characterized in that: the composite material consists of 30-60 parts of PTFE, 20-40 parts of epoxy resin, 10-20 parts of nano-scale oxide particles, 5-10 parts of barium sulfate, 5-10 parts of magnesium sulfate, 5-10 parts of talcum powder, 1-5 parts of silane coupling agent and 20-40 parts of organic solvent according to parts by weight, wherein the organic solvent is one or a mixture of more of trichloroethylene, styrene, xylene or triethanolamine.

2. The rubber mold coating of claim 1, wherein: the coating is prepared by mixing PTFE, epoxy resin, nano-scale oxide particles, barium sulfate, magnesium sulfate, talcum powder, a silane coupling agent and an organic solvent in parts by mass, and stirring at the speed of 500-800 r/min for 6-24 hours.

3. The rubber mold coating of claim 1, wherein: the nano-scale oxide particles are nano titanium dioxide particles or nano silicon dioxide particles or the mixture of the nano titanium dioxide particles and the nano silicon dioxide particles.

4. The rubber mold coating of claim 1, wherein: the particle size of the nano-scale oxide particles is 300-800 nanometers.

5. The rubber mold coating of claim 1, wherein: the paint consists of, by mass, 45 parts of PTFE, 30 parts of epoxy resin, 15 parts of nano-scale oxide particles, 8 parts of barium sulfate, 8 parts of magnesium sulfate, 8 parts of talcum powder, 3 parts of a silane coupling agent and 30 parts of an organic solvent, wherein the organic solvent is styrene.

6. A method of using the rubber mold coating of claim 1, characterized by: the method comprises the following steps:

A. preparing the rubber mold coating according to the mass part ratio;

B. adding a coagulant into the rubber mold coating prepared in the step A, stirring for 2-5 hours at the rotating speed of 100-500 rpm, and standing for 1-3 hours, wherein the addition amount of the coagulant is 0.5-2wt% of the total mass;

C. polishing a rubber mold to be coated with a coating by using abrasive paper, and then putting the rubber mold into a cleaning agent for ultrasonic cleaning for 0.5-3 hours to remove dust and oil stains on the surface of the mold, wherein the abrasive paper is 60-180 meshes, and the cleaning agent is water, absolute ethyl alcohol, acetone or any combination of the water, the absolute ethyl alcohol and the acetone;

D. c, drying the rubber mold obtained in the step C at 40-80 ℃ to remove the surface cleaning agent;

E. and C, coating the coating obtained in the step B on the surface of a rubber mold, and drying at 60-80 ℃ to finish coating.

7. The method of using a rubber mold coating according to claim 6, characterized in that: and the coagulant in the step B consists of 10-20 parts of calcium nitrate, 5-10 parts of calcium chloride, 1-5 parts of sodium chloride, 1-5 parts of composite aluminum-iron polymer and 50-80 parts of methanol in parts by mass.

8. The method of using a rubber mold coating according to claim 7, characterized in that: the preparation method of the coagulant comprises the following steps:

A. adding 10-20 parts of calcium nitrate, 5-10 parts of calcium chloride, 1-5 parts of sodium chloride, 1-5 parts of composite aluminum-iron polymer and 50-80 parts of methanol into a stirrer according to the mass parts;

B. heating the stirrer to 50-80 ℃, setting the stirring speed at 100-;

C. and D, sealing and storing the mixed solution obtained in the step B, namely the coagulant.

9. The method of using a rubber mold coating according to claim 6, characterized in that: and E, the coating mode is one of spraying, brushing or pouring coating.

Technical Field

The invention belongs to the field of coatings, and particularly relates to a rubber mold coating and a using method thereof.

Background

With the development of science and technology, the rubber mold becomes a widely used preparation process means, pollutants are inevitably dropped on the surface of the mold in the use process of the rubber mold, after the use times are increased, the pollutants with different properties can generate certain corrosion effect on the surface of the mold, some acidic or alkaline particles are easily remained on the surface of the mold after the mold is cleaned, and the size precision of the mold can be changed due to the repeated cleaning, so that the final product quality is influenced, and the great energy loss and the improvement of the production cost are brought.

To sum up, the acid and alkali resistant coating capable of being coated on the surface of the rubber mold is urgently to be developed, the rubber mold is prevented from being in direct contact with acidic and alkaline particles, the friction resistance can be improved, the service life of the rubber mold can be effectively prolonged, the yield of products is improved, and the production cost is reduced.

Disclosure of Invention

In order to solve the problem that the surface of a rubber mold is easy to corrode in the prior art, the invention provides a rubber mold coating and a using method thereof.

The invention adopts the following technical scheme:

a rubber mold coating comprises, by mass, 30-60 parts of PTFE, 20-40 parts of epoxy resin, 10-20 parts of nano-scale oxide particles, 5-10 parts of barium sulfate, 5-10 parts of magnesium sulfate, 5-10 parts of talcum powder, 1-5 parts of a silane coupling agent and 20-40 parts of an organic solvent, wherein the organic solvent is one or a mixture of more of trichloroethylene, styrene, xylene or triethanolamine.

As a preferred technical scheme of the invention, the coating is obtained by mixing PTFE, epoxy resin, nano-scale oxide particles, barium sulfate, magnesium sulfate, talcum powder, a silane coupling agent and an organic solvent in parts by mass and then stirring the mixture for 6 to 24 hours at the speed of 500-800 revolutions per minute.

As a preferred technical scheme of the invention, the nano-scale oxide particles are nano titanium dioxide particles or nano silicon dioxide particles or a mixture of the nano titanium dioxide particles and the nano silicon dioxide particles.

As a preferred technical scheme of the invention, the particle diameter of the nano-scale oxide particles is 300-800 nm.

As a preferred technical scheme of the invention, the composite material comprises, by mass, 45 parts of PTFE, 30 parts of epoxy resin, 15 parts of nano-scale oxide particles, 8 parts of barium sulfate, 8 parts of magnesium sulfate, 8 parts of talcum powder, 3 parts of silane coupling agent and 30 parts of organic solvent, wherein the organic solvent is styrene.

A use method of a rubber mold coating comprises the following steps:

A. preparing the rubber mold coating according to the mass part ratio;

B. adding a coagulant into the rubber mold coating prepared in the step A, stirring for 2-5 hours at the rotating speed of 100-500 rpm, and standing for 1-3 hours, wherein the addition amount of the coagulant is 0.5-2wt% of the total mass;

C. polishing a rubber mold to be coated with a coating by using abrasive paper, and then putting the rubber mold into a cleaning agent for ultrasonic cleaning for 0.5-3 hours to remove dust and oil stains on the surface of the mold, wherein the abrasive paper is 60-180 meshes, and the cleaning agent is water, absolute ethyl alcohol, acetone or any combination of the water, the absolute ethyl alcohol and the acetone;

D. c, drying the rubber mold obtained in the step C at 40-80 ℃ to remove the surface cleaning agent;

E. and C, coating the coating obtained in the step B on the surface of a rubber mold, and drying at 60-80 ℃ to finish coating.

As a preferable technical scheme of the invention, the coagulant in the step B consists of 10-20 parts of calcium nitrate, 5-10 parts of calcium chloride, 1-5 parts of sodium chloride, 1-5 parts of composite aluminum-iron polymer and 50-80 parts of methanol by mass.

As a preferable technical scheme of the invention, the preparation method of the coagulant comprises the following steps:

A. adding 10-20 parts of calcium nitrate, 5-10 parts of calcium chloride, 1-5 parts of sodium chloride, 1-5 parts of composite aluminum-iron polymer and 50-80 parts of methanol into a stirrer according to the mass parts;

B. heating the stirrer to 50-80 ℃, setting the stirring speed at 100-;

C. and D, sealing and storing the mixed solution obtained in the step B, namely the coagulant.

As a preferable technical solution of the present invention, the coating manner in step E is one of spraying, brushing and pouring.

Compared with the prior art, the invention has the beneficial effects that the prepared coating has good acid and alkali resistance, and the rubber mold has certain acid and alkali resistance and the friction resistance of the mold is improved to a certain extent when the coating is coated on the surface of the rubber mold.

Detailed Description

The present invention is further described with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the claims, and other alternatives which may occur to those skilled in the art are also within the scope of the claims.

Example 1

A rubber mold coating comprises, by mass, 30 parts of PTFE, 20 parts of epoxy resin, 10 parts of nano-scale oxide particles, 5 parts of barium sulfate, 5 parts of magnesium sulfate, 5 parts of talcum powder, 1 part of a silane coupling agent and 20 parts of an organic solvent, wherein the organic solvent is trichloroethylene.

Specifically, the coating is prepared by mixing PTFE, epoxy resin, nano-scale oxide particles, barium sulfate, magnesium sulfate, talcum powder, a silane coupling agent and an organic solvent in parts by mass, and then stirring at a speed of 500 revolutions per minute for 6 hours.

Specifically, the nanoscale oxide particles are nano titanium dioxide particles.

Specifically, the particle size of the nano-scale oxide particles is 300-800 nm.

The use method of the rubber mold coating comprises the following steps:

A. preparing the rubber mold coating according to the mass part ratio;

B. adding a coagulant into the rubber mold coating prepared in the step A, stirring for 2 hours at the rotating speed of 100 revolutions per minute, and standing for 1 hour, wherein the addition amount of the coagulant is 0.5 wt% of the total mass;

C. polishing a rubber mold to be coated with a coating by using abrasive paper, and then placing the rubber mold in a cleaning agent for ultrasonic cleaning for 0.5 hour to remove dust and oil stains on the surface of the mold, wherein the abrasive paper is 60 meshes, and the cleaning agent is water, absolute ethyl alcohol, acetone or any combination of the water, the absolute ethyl alcohol and the acetone;

D. c, drying the rubber mold obtained in the step C at 40 ℃ to remove the cleaning agent on the surface;

E. and C, coating the coating obtained in the step B on the surface of a rubber mold, and drying at 60 ℃ to finish coating.

Specifically, the coagulant in the step B consists of 10 parts by mass of calcium nitrate, 5 parts by mass of calcium chloride, 1 part by mass of sodium chloride, 1 part by mass of composite aluminum-iron polymer and 50 parts by mass of methanol.

Specifically, the preparation method of the coagulant comprises the following steps:

A. adding 10 parts of calcium nitrate, 5 parts of calcium chloride, 1 part of sodium chloride, 1 part of composite aluminum-iron polymer and 50 parts of methanol into a stirrer in parts by mass;

B. heating the stirrer to 50 ℃, setting the stirring speed to be 100 revolutions per minute, and stirring for 1 hour at the temperature and the stirring speed until the mixed solution is uniform;

C. and D, sealing and storing the mixed solution obtained in the step B, namely the coagulant.

Specifically, the coating manner in step E is spraying.

Example 2

The rubber mold coating comprises, by mass, 60 parts of PTFE, 40 parts of epoxy resin, 20 parts of nano-scale oxide particles, 10 parts of barium sulfate, 10 parts of magnesium sulfate, 10 parts of talcum powder, 5 parts of a silane coupling agent and 40 parts of an organic solvent, wherein the organic solvent is triethanolamine.

Specifically, the coating is prepared by mixing PTFE, epoxy resin, nano-scale oxide particles, barium sulfate, magnesium sulfate, talcum powder, a silane coupling agent and an organic solvent in parts by mass, and then stirring at the speed of 800 revolutions per minute for 24 hours.

Specifically, the nanoscale oxide particles are nanosilica particles.

Specifically, the particle size of the nano-scale oxide particles is 300-800 nm.

The use method of the rubber mold coating comprises the following steps:

A. preparing the rubber mold coating according to the mass part ratio;

B. adding a coagulant into the rubber mold coating prepared in the step A, stirring for 5 hours at the rotating speed of 500 revolutions per minute, and standing for 3 hours, wherein the addition amount of the coagulant is 2wt% of the total mass;

C. polishing a rubber mold to be coated with a coating by using sand paper, and then placing the rubber mold in a cleaning agent for ultrasonic cleaning for 3 hours to remove dust and oil stains on the surface of the mold, wherein the sand paper is 180 meshes, and the cleaning agent is water, absolute ethyl alcohol, acetone or any combination of water, absolute ethyl alcohol and acetone;

D. drying the rubber mold obtained in the step C at 80 ℃ to remove the cleaning agent on the surface;

E. and C, coating the coating obtained in the step B on the surface of the rubber mold, and drying at 80 ℃ to finish coating.

Specifically, the coagulant in the step B consists of 20 parts by mass of calcium nitrate, 10 parts by mass of calcium chloride, 5 parts by mass of sodium chloride, 5 parts by mass of composite aluminum-iron polymer and 80 parts by mass of methanol.

Specifically, the preparation method of the coagulant comprises the following steps:

A. adding 20 parts of calcium nitrate, 10 parts of calcium chloride, 5 parts of sodium chloride, 5 parts of composite aluminum-iron polymer and 80 parts of methanol into a stirrer in parts by mass;

B. heating the stirrer to 80 ℃, setting the stirring speed to be 500 revolutions per minute, and stirring for 3 hours at the temperature and the stirring speed until the mixed solution is uniform;

C. and D, sealing and storing the mixed solution obtained in the step B, namely the coagulant.

Specifically, the coating manner in step E is spraying.

Example 3

A rubber mold coating comprises, by mass, 50 parts of PTFE, 30 parts of epoxy resin, 15 parts of nano-scale oxide particles, 8 parts of barium sulfate, 8 parts of magnesium sulfate, 8 parts of talcum powder, 3 parts of a silane coupling agent and 30 parts of an organic solvent, wherein the organic solvent is one or a mixture of more of trichloroethylene, styrene, xylene or triethanolamine.

Specifically, the coating is prepared by mixing PTFE, epoxy resin, nano-scale oxide particles, barium sulfate, magnesium sulfate, talcum powder, a silane coupling agent and an organic solvent in parts by mass, and then stirring at a speed of 600 revolutions per minute for 12 hours.

Specifically, the nano-scale oxide particles are nano titanium dioxide particles or nano silicon dioxide particles or a mixture of the nano titanium dioxide particles and the nano silicon dioxide particles.

Specifically, the nano-sized oxide particles have a particle size of 500 nm.

The use method of the rubber mold coating comprises the following steps:

A. preparing the rubber mold coating according to the mass part ratio;

B. adding a coagulant into the rubber mold coating prepared in the step A, stirring for 3 hours at the rotating speed of 300 revolutions per minute, and standing for 1-3 hours, wherein the addition amount of the coagulant is 1 wt% of the total mass;

C. polishing a rubber mold to be coated with a coating by using sand paper, and then placing the rubber mold in a cleaning agent for ultrasonic cleaning for 2 hours to remove dust and oil stains on the surface of the mold, wherein the sand paper is 120 meshes, and the cleaning agent is water, absolute ethyl alcohol, acetone or any combination of water, absolute ethyl alcohol and acetone;

D. c, drying the rubber mold obtained in the step C at 60 ℃ to remove the cleaning agent on the surface;

E. and C, coating the coating obtained in the step B on the surface of a rubber mold, and drying at 70 ℃ to finish coating.

Specifically, the coagulant in the step B consists of 15 parts of calcium nitrate, 8 parts of calcium chloride, 3 parts of sodium chloride, 3 parts of composite aluminum-iron polymer and 60 parts of methanol in parts by mass.

Specifically, the preparation method of the coagulant comprises the following steps:

A. adding 15 parts of calcium nitrate, 8 parts of calcium chloride, 3 parts of sodium chloride, 3 parts of composite aluminum-iron polymer and 60 parts of methanol into a stirrer in parts by mass;

B. heating the stirrer to 60 ℃, setting the stirring speed to be 300 revolutions per minute, and stirring for 2 hours at the temperature and the stirring speed until the mixed solution is uniform;

C. and D, sealing and storing the mixed solution obtained in the step B, namely the coagulant.

Specifically, the coating manner in step E is spraying.

Example 4

A rubber mold coating comprises, by mass, 40 parts of PTFE, 20 parts of epoxy resin, 14 parts of nano-scale oxide particles, 7 parts of barium sulfate, 6 parts of magnesium sulfate, 8 parts of talcum powder, 3 parts of a silane coupling agent and 40 parts of an organic solvent, wherein the organic solvent is trichloroethylene.

Specifically, the coating is prepared by mixing PTFE, epoxy resin, nano-scale oxide particles, barium sulfate, magnesium sulfate, talcum powder, a silane coupling agent and an organic solvent in parts by mass, and then stirring at the speed of 550 revolutions per minute for 10 hours.

Specifically, the nanoscale oxide particles are nano titanium dioxide particles.

Specifically, the particle size of the nano-scale oxide particles is 300-800 nm.

The use method of the rubber mold coating comprises the following steps:

A. preparing the rubber mold coating according to the mass part ratio;

B. adding a coagulant into the rubber mold coating prepared in the step A, stirring for 3 hours at the rotating speed of 200 revolutions per minute, and standing for 1-3 hours, wherein the addition amount of the coagulant is 1 wt% of the total mass;

C. polishing a rubber mold to be coated with a coating by using sand paper, and then placing the rubber mold in a cleaning agent for ultrasonic cleaning for 1 hour to remove dust and oil stains on the surface of the mold, wherein the sand paper is 180 meshes, and the cleaning agent is water, absolute ethyl alcohol, acetone or any combination of water, absolute ethyl alcohol and acetone;

D. c, drying the rubber mold obtained in the step C at 40 ℃ to remove the cleaning agent on the surface;

E. and C, coating the coating obtained in the step B on the surface of a rubber mold, and drying at 60 ℃ to finish coating.

Specifically, the coagulant in the step B consists of 20 parts by mass of calcium nitrate, 7 parts by mass of calcium chloride, 1 part by mass of sodium chloride, 3 parts by mass of composite aluminum-iron polymer and 60 parts by mass of methanol.

Specifically, the preparation method of the coagulant comprises the following steps:

A. adding 20 parts of calcium nitrate, 7 parts of calcium chloride, 1 part of sodium chloride, 3 parts of composite aluminum-iron polymer and 60 parts of methanol into a stirrer in parts by mass;

B. heating the stirrer to 80 ℃, setting the stirring speed to be 100 revolutions per minute, and stirring for 3 hours at the temperature and the stirring speed until the mixed solution is uniform;

C. and D, sealing and storing the mixed solution obtained in the step B, namely the coagulant.

Specifically, the coating manner in step E is spraying.

The acid and alkali resistance is characterized by the following means:

A. 8 paint-coated rubber molds were prepared according to the method of use described in examples 1-4, 2 for each example;

B. preparing a sodium hydroxide solution with the concentration of 5% and a dilute sulfuric acid solution;

C. placing 2 molds of each example in a sodium hydroxide solution and a dilute sulfuric acid solution respectively, and placing the molds in a thermostat at the temperature of 25 ℃;

D. the coating was observed for blistering at 12 hour intervals and recorded as given in table 1.

TABLE 1 results of examples 1-4 whether foaming occurred after soaking in acid and alkali solutions

The results in Table 1 show that examples 1-4 have good acid and alkali resistance, and thus the rubber mold coating provided by the invention has good acid and alkali resistance.

The above examples are merely illustrative for clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.