Industrial elastic coating for chemical storage tank and preparation method of industrial elastic coating

Abstract

The invention is applied to the technical field of elastic coatings, and discloses an industrial elastic coating for a chemical storage tank, the elastic coating is composed of a component A and a component B. The component A is composed of liquid rubber, a high polymer emulsion, a filler, a wetting agent, a dispersant, a leveling agent and a first solvent, and the component B is composed of a curing agent and a second solvent. According to the industrial elastic coating for the chemical storage tank, the high polymer emulsion is added into the coating, and the high polymer emulsion is replaced according to different use environments, so that the coating can obtain excellent durability, ultraviolet resistance, chemical stability, heat resistance, weather resistance and oil resistance, the coating is more durable, and the service life of the coating is prolonged. According to the present invention, the coating material has characteristics of low cost, low cracking, peeling and other phenomena, the different types of the liquid rubber have excellent durability, excellent corrosion resistance, excellent flexibility, excellent wear resistance and excellent oil resistance after the curing, and the coating material can adapt to the corrosion of various chemical raw materials after the curing so as to ensure the storage stability of the storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of elastic coatings, in particular to an industrial elastic coating for chemical storage tanks and a preparation method thereof. Background Art

[0002] Chemical storage tanks play a vital role in the chemical industry and are used to store various chemicals. However, due to the diversity and corrosiveness of the stored chemicals, the protection of the tanks poses a severe challenge. At present, there are many problems with common chemical storage tank protective coatings. Traditional coatings often perform poorly in terms of elasticity, corrosion resistance and chemical resistance. During the long-term use of chemical storage tanks, due to temperature changes, mechanical vibrations and chemical erosion, the coatings are prone to cracking and peeling, which causes the metal substrate of the tank to be exposed to harsh environments, accelerates the corrosion process and shortens the service life of the tank. In addition, some coatings have difficulties in the construction process, such as long drying time and demanding construction environment requirements, which not only increases the construction cost, but also affects the time the tank is put into use. With the continuous development of the chemical industry, the protection requirements for chemical storage tanks are increasing. Not only does the coating need to have excellent protective properties and be able to resist the erosion of various chemicals for a long time, but it also needs to have good construction performance and environmental protection performance to meet the needs of modern chemical production. Summary of the invention

[0003] The purpose of the present invention is to provide an industrial elastic coating for chemical storage tanks and a preparation method thereof, so as to solve the problems mentioned in the above background technology that the coating is prone to cracking, peeling, etc., has a long drying time, and has strict requirements on the construction environment.

[0004] To achieve the above object, the present invention provides the following technical solutions: an industrial elastic coating for chemical storage tanks, comprising the elastic coating consisting of component A and component B, wherein component A consists of liquid rubber, polymer emulsion, filler, wetting agent, dispersant, leveling agent and a first solvent;

[0005] The B component consists of a curing agent and a second solvent.

[0006] Preferably, in terms of mass percentage, the proportion of component A is:

[0007]

[0008] The total weight of each component is 100%.

[0009] Preferably, in terms of mass percentage, the proportion of component B is:

[0010] Curing agent 35%-45%;

[0011] Second solvent 55%-65%;

[0012] The sum of the mass of each component is 100%;

[0013] The weight ratio of the B component to the A component is (1-5):100.

[0014] Preferably, the liquid rubber is one of hydrogenated nitrile rubber, butyl rubber and its hydroxylation product and polyether polyol rubber, the polymer emulsion is one of acrylic emulsion, styrene emulsion and chloroprene rubber emulsion, and the filler is one of polyethylene powder and fire retardant.

[0015] Preferably, the wetting agent is polypropylene glycol, the dispersant is a formaldehyde condensate of sodium methylnaphthalene sulfonate, and the leveling agent is a water-based polyurethane leveling agent.

[0016] Preferably, the first solvent and the second solvent are independently one of ethylene glycol ethyl ether and propylene glycol ether solvents.

[0017] Preferably, the curing agent is one of sulfur monochloride and butanone peroxide.

[0018] A method for preparing an elastic coating, the method comprising the following steps:

[0019] S1. Weigh the raw materials according to the formula of component A, and add the first solvent into the mixer;

[0020] S2. Add liquid rubber, polymer emulsion, filler, wetting agent, dispersant and leveling agent in sequence during the stirring process;

[0021] S3. Extract the mixed material in S2 and store it temporarily;

[0022] S4. Weigh the raw materials according to the B component formula, add the curing agent and the second solvent to the mixer and mix thoroughly, then extract the mixed material and store temporarily;

[0023] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through the funnel according to the proportion, heated and continuously stirred to obtain the elastic coating.

[0024] Preferably, the time for heating and stirring in S5 is 1-8 hours, the temperature range of heating and stirring is 5° C.-45° C., and the rotation speed of heating and stirring is between 300 rpm-800 rpm.

[0025] Preferably, the mixture in S2, the mixture in S4 and the elastic coating in S5 are all required to be stored in a sealed state.

[0026] Compared with the prior art, the beneficial effects of the present invention are: the industrial elastic coating for chemical storage tanks:

[0027] 1. By adding polymer emulsion to the coating and replacing the polymer emulsion according to different use environments, the coating can obtain excellent durability, UV resistance, excellent chemical stability, heat resistance, weather resistance, and oil resistance, making the coating more durable and less prone to cracking and peeling;

[0028] 2. Different types of liquid rubber have excellent durability, corrosion resistance, flexibility, wear resistance and oil resistance after curing, so that the coating can adapt to the erosion of various chemical raw materials after curing, ensuring the storage stability of the storage tank;

[0029] 3. By adding curing agent, the paint can be quickly cured in various environments after mixing and coating, thereby reducing the requirements for the construction environment and increasing the drying time of the paint, making the coating process faster and avoiding volatilization and sagging caused by the paint not drying for a long time. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a technical solution: an industrial elastic coating for chemical storage tanks.

[0032] Example 1: This example discloses that component A consists of hydrogenated nitrile rubber, acrylic emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0033] Component B consists of sulfur monochloride and ethylene glycol ether;

[0034] The preparation method of the coating comprises the following steps:

[0035] S1. Weigh the raw materials according to the formula of component A, and add 21.7% of the first solvent into the mixer;

[0036] S2. 45% of liquid rubber, 16% of polymer emulsion, 15% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0037] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0038] S4. According to the formula of component B, the raw materials are weighed, 35% of the curing agent and 65% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0039] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 10°C and continuously stirred at 500 rpm for 1.5 hours to obtain an elastic coating, which is then sealed and stored.

[0040] Example 2: This example discloses that component A is composed of butyl rubber and its hydroxylation product, acrylic emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0041] Component B consists of sulfur monochloride and ethylene glycol ether;

[0042] The preparation method of the coating comprises the following steps:

[0043] S1. Weigh the raw materials according to the formula of component A, and add 25% of the first solvent into the mixer;

[0044] S2. 41% of liquid rubber, 17.7% of polymer emulsion, 14% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0045] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0046] S4. According to the formula of component B, the raw materials are weighed, 35% of the curing agent and 65% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0047] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 10°C and continuously stirred at 500 rpm for 1.5 hours to obtain an elastic coating, which is then sealed and stored.

[0048] Example 3: This example discloses that component A consists of polyether polyol rubber, acrylic emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0049] Component B consists of sulfur monochloride and ethylene glycol ether;

[0050] The preparation method of the coating comprises the following steps:

[0051] S1. Weigh the raw materials according to the formula of component A, and add 29.5% of the first solvent into the mixer;

[0052] S2. 41.2% of liquid rubber, 12% of polymer emulsion, 15% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0053] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0054] S4. According to the formula of component B, the raw materials are weighed, 35% of the curing agent and 65% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0055] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 25° C. and continuously stirred at 500 rpm for 2.5 h to obtain an elastic coating, which is then sealed and stored.

[0056] Example 4: This example discloses that component A consists of hydrogenated nitrile rubber, styrene emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0057] Component B consists of sulfur monochloride and ethylene glycol ether;

[0058] The preparation method of the coating comprises the following steps:

[0059] S1. Weigh the raw materials according to the formula of component A, and add 21.7% of the first solvent into the mixer;

[0060] S2. 43% of liquid rubber, 18% of polymer emulsion, 15% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0061] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0062] S4. According to the formula of component B, the raw materials are weighed, 35% of the curing agent and 65% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0063] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 25° C. and continuously stirred at 500 rpm for 2.5 h to obtain an elastic coating, which is then sealed and stored.

[0064] Embodiment 5: This embodiment discloses that component A is composed of hydrogenated nitrile rubber, chloroprene rubber emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0065] Component B consists of sulfur monochloride and ethylene glycol ether;

[0066] The preparation method of the coating comprises the following steps:

[0067] S1. Weigh the raw materials according to the formula of component A, and add 21.7% of the first solvent into the mixer;

[0068] S2. 46% of liquid rubber, 15% of polymer emulsion, 15% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0069] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0070] S4. According to the formula of component B, the raw materials are weighed, 35% of the curing agent and 65% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0071] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 35° C. and continuously stirred at 500 rpm for 3 hours to obtain an elastic coating, which is then sealed and stored.

[0072] Example 6: This example discloses that component A consists of hydrogenated nitrile rubber, acrylic emulsion, fire retardant, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0073] Component B consists of sulfur monochloride and ethylene glycol ether;

[0074] The preparation method of the coating comprises the following steps:

[0075] S1. Weigh the raw materials according to the formula of component A, and add 21.7% of the first solvent into the mixer;

[0076] S2. 44% of liquid rubber, 15% of polymer emulsion, 17% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0077] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0078] S4. According to the formula of component B, the raw materials are weighed, 35% of the curing agent and 65% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0079] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 35° C. and continuously stirred at 500 rpm for 3 hours to obtain an elastic coating, which is then sealed and stored.

[0080] Embodiment 7: This embodiment discloses that component A is composed of hydrogenated nitrile rubber, acrylic emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and propylene glycol ether solvent;

[0081] Component B consists of sulfur monochloride and propylene glycol ether solvent;

[0082] The preparation method of the coating comprises the following steps:

[0083] S1. Weigh the raw materials according to the formula of component A, and add 27.7% of the first solvent into the mixer;

[0084] S2. 42% of liquid rubber, 13% of polymer emulsion, 15% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0085] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0086] S4. According to the formula of component B, the raw materials are weighed, 45% of the curing agent and 55% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0087] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 38° C. and continuously stirred at 500 rpm for 3 hours to obtain an elastic coating, which is then sealed and stored.

[0088] Embodiment 8: This embodiment discloses that component A is composed of hydrogenated nitrile rubber, acrylic emulsion, polyethylene powder, polypropylene glycol, formaldehyde condensate of sodium methylnaphthalene sulfonate, water-based polyurethane leveling agent and ethylene glycol ethyl ether;

[0089] Component B consists of butanone peroxide and ethylene glycol ethyl ether;

[0090] The preparation method of the coating comprises the following steps:

[0091] S1. Weigh the raw materials according to the formula of component A, and add 21.7% of the first solvent into the mixer;

[0092] S2. 45% of liquid rubber, 16% of polymer emulsion, 15% of filler, 0.7% of wetting agent, 0.8% of dispersant and 0.8% of leveling agent were added in sequence during the stirring process;

[0093] S3. Extract the mixed material in S2 and seal it for temporary storage;

[0094] S4. According to the formula of component B, the raw materials are weighed, 38% of the curing agent and 62% of the second solvent are added to the mixer and mixed thoroughly, and then the mixture is extracted and sealed for temporary storage;

[0095] S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated to 5°C and continuously stirred at 500 rpm for 1 hour to obtain an elastic coating, which is then sealed and stored.

[0096] Table 1 - Test data of stain resistance, tensile strength and elongation at break of the inventive coating

[0097]

[0098] It can be seen from the above table that Example 5 has the best stain resistance, Example 4 has the highest tensile strength and good elasticity, and Example 1 has the best elongation at break and is not prone to cracks.

[0099] Table 2 - Drying time test data of the inventive coating

[0100] project Embodiment 1 Embodiment 8 Test method standards Surface dry / min 20 17.5 GB1728-79 Working / h 16 12.8 GB1728-79

[0101] It can be seen from the above table that the drying speed of Example 8 is the fastest, which can improve the quality of spraying and prevent the occurrence of sagging.

[0102] Table 3 - Monitoring data of physical and chemical properties of the inventive coatings

[0103] project Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 6 Embodiment 7 Test method standards Flexibility / mm 1.02 1.08 0.98 0.95 1.02 GB / T1731-93(79) Impact resistance / kg·cm 45 50 48 49 45 GB / T1732-93(79) <![CDATA[Acid resistance (10% H2SO4) / h]]> 82 79 76 78 82 GB1763-79 Alkali resistance (10% NaOH) / h 76 72 69 74 76 GB1763-79 Salt water resistance (3% NaCl) / h 92 88 89 78 92 GB1763-79 Water resistance (25℃ distilled water) / h 105 120 107 122 105 GB / T1733-93(79) <![CDATA[Oil resistance (120 # gasoline) / h]]> 42 48 51 45 42 GB / T1734-93(79) Heat resistance / h 4.5 4.7 4.2 4.2 6.5 No change at 250℃

[0104] It can be seen from the above table that: Example 2 has good flexibility and impact resistance, and can be used for coating protection of soft materials, while Example 1 and Example 7 have good acid resistance, alkali resistance and salt water resistance, and can be used in more complex chemical environments. Example 6 has good water resistance and can be used in humid environments. Example 3 has good creaminess and can be used in gasoline storage scenarios. Example 7 has good heat resistance and is suitable for high temperature environments.

[0105] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An industrial elastic coating for chemical storage tanks, characterized in that: The elastic coating is composed of component A and component B, wherein component A comprises liquid rubber, polymer emulsion, filler, wetting agent, dispersant, leveling agent and a first solvent; The B component consists of a curing agent and a second solvent.

2. The industrial elastic coating for chemical storage tanks according to claim 1, characterized in that: In terms of mass percentage, the proportion of component A is:

3. The industrial elastic coating for chemical storage tanks according to claim 1, characterized in that: In terms of mass percentage, the proportion of component B is: Curing agent 35%-45%; Second solvent 55%-65%; The sum of the mass of each component is 100%; The weight ratio of the B component to the A component is (1-5):

100.

4. An industrial elastic coating for chemical storage tanks according to any one of claims 1 to 3, characterized in that: The liquid rubber is one of hydrogenated nitrile rubber, butyl rubber and its hydroxylation product and polyether polyol rubber, the polymer emulsion is one of acrylic emulsion, styrene emulsion and chloroprene rubber emulsion, and the filler is one of polyethylene powder and fire retardant.

5. An industrial elastic coating for chemical storage tanks according to any one of claims 1 to 3, characterized in that: The wetting agent is polypropylene glycol, the dispersant is formaldehyde condensate of sodium methylnaphthalene sulfonate, and the leveling agent is a water-based polyurethane leveling agent.

6. An industrial elastic coating for chemical storage tanks according to any one of claims 1 to 3, characterized in that: The first solvent and the second solvent are independently one of ethylene glycol ether and propylene glycol ether solvents.

7. An industrial elastic coating for chemical storage tanks according to any one of claims 1 to 3, characterized in that: The curing agent is one of sulfur monochloride and butanone peroxide.

8. A method for preparing an elastic coating according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: S1. Weigh the raw materials according to the formula of component A, and add the first solvent into the mixer; S2. Add liquid rubber, polymer emulsion, filler, wetting agent, dispersant and leveling agent in sequence during the stirring process; S3. Extract the mixed material in S2 and store it temporarily; S4. Weigh the raw materials according to the B component formula, add the curing agent and the second solvent to the mixer and mix thoroughly, then extract the mixed material and store temporarily; S5. The mixed material in S2, the filler and the mixed material in S4 are respectively injected into the mixer through a funnel according to the proportion, heated and continuously stirred to obtain an elastic coating.

9. A method for preparing an elastic coating according to claim 8, characterized in that: The time of heating and stirring in S5 is 1-8h, the temperature range of heating and stirring is 5°C-45°C, and the rotation speed of heating and stirring is between 300rpm-800rpm.

10. A method for preparing an elastic coating according to claim 8, characterized in that: The mixture in S2, the mixture in S4 and the elastic coating in S5 need to be sealed and stored.

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