CN116200077B - Anticorrosion waterproof coating based on various main chain saturated resins and preparation method thereof - Google Patents

Anticorrosion waterproof coating based on various main chain saturated resins and preparation method thereof Download PDF

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CN116200077B
CN116200077B CN202310234513.8A CN202310234513A CN116200077B CN 116200077 B CN116200077 B CN 116200077B CN 202310234513 A CN202310234513 A CN 202310234513A CN 116200077 B CN116200077 B CN 116200077B
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CN116200077A (en
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范瑞杰
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Huangshan Huirui New Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Wood Science & Technology (AREA)
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  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The application provides an anti-corrosion waterproof coating based on various main chain saturated resins and a preparation method thereof, and relates to the technical field of waterproof and anti-corrosion coatings. The coating consists of a component A and a component B, wherein the component A comprises low-molecular-weight liquid polybutadiene, ethylene propylene diene monomer rubber, SEBS, a crosslinking assistant, pigment, filler, a processing aid and a solvent; component B comprises a cross-linking agent, a cocatalyst and a solvent. According to the content and mutual collocation of different saturated rubbers, the anti-corrosion coating can be prepared by adopting a construction process of rolling, spraying and brushing as the anti-corrosion coating through mixing in a specific proportion, and meanwhile, compared with the traditional acrylic acid-based, polyurea resin, epoxy zinc-coated and other coatings, the anti-corrosion coating has obvious advantages in terms of high elastic modulus, water resistance, chemical resistance, weather resistance, high/low temperature resistance, corrosion resistance and protection, and can be widely applied to the fields of building, energy, electric power, traffic, chemical industry and the like.

Description

Anticorrosion waterproof coating based on various main chain saturated resins and preparation method thereof
Technical Field
The application belongs to the technical field of waterproof and anticorrosive coatings, and particularly relates to an anticorrosive and waterproof coating based on various main chain saturated resins and a preparation method thereof.
Background
The paint is a kind of liquid or solid material which can form film to protect, waterproof, anticorrosive or heat-resisting, alkali-resisting and insulating material when it is coated on the surface of object. In the application process of the traditional waterproof coating in the fields of construction, traffic, chemical industry and the like, the defects of poor elastic modulus, low tensile strength, sensitivity to temperature change, poor weather resistance and corrosion resistance and long drying process time exist often, so that the conditions of aging, dry cracking, poor adhesive force, deformation, layering and even cracking and leakage are caused, the construction difficulty is high, the quality is poor, and the service life is short.
Polybutadiene is a liquid rubber-like polymer synthesized from butadiene. The main polymer chain of the 1, 2-polybutadiene is completely saturated, and vinyl side groups exist on the molecular main chain, so that the main polymer chain has the advantages of aging resistance, good wet skid resistance and the like, and is one of main film forming substances. The 1, 2-polybutadiene can be widely applied to the preparation of cross-linking agents, rubber and plastics.
Hydrogenated styrene-butadiene block copolymers (SEBS) are thermoplastic elastomers prepared by selective hydrogenation of the unsaturated double bonds of polybutadiene in the rubber segment of SBS molecules. The SEBS is completely saturated on the main chain, belongs to styrene block polymers, is suitable for curing reaction with peroxide, has high curing efficiency, thus having extremely high weather resistance and chemical resistance, and shows excellent cohesiveness with the surfaces of various materials. As the soft butadiene segment exists in the SEBS chain segment, the elongation at break of a film coating film can be further improved, and the elastic modulus is improved.
Ethylene propylene diene monomer is a copolymer of ethylene, propylene and a non-conjugated diene. Diolefins have a special structure, only one of the two bonds being copolymerizable, the unsaturated double bonds being the main crosslinking sites. The other unsaturated does not become a polymer main chain, only becomes an edge side chain, and is one of main film forming substances. The main polymer chain of ethylene propylene diene monomer is fully saturated. This property makes ethylene propylene rubber resistant to heat, light, oxygen, and particularly ozone. Ethylene propylene diene monomer is essentially nonpolar, is resistant to polar solutions and chemicals, has low water absorption, and has good insulating properties. In the production process of ethylene propylene diene monomer, the characteristics of the ethylene propylene diene monomer can be adjusted by changing the quantity of the three monomers, the ethylene propylene ratio, the molecular weight and the distribution thereof and the vulcanization method. Compared with the conventional epoxy resin coating, acrylate coating, polyurea coating and the like, the ethylene propylene diene monomer coating not only has higher chemical resistance, water resistance and weather resistance after being crosslinked and cured, but also has better tensile elongation, breaking strength, elastic modulus and high and low temperature environment resistance.
Chinese patent No. CN102070870a discloses a blended thermoplastic rubber with high elasticity and high strength and a method for preparing the same. The application uses SEBS and ethylene propylene rubber to blend, and adds anti-aging agent, accelerator and sulfur, etc. the blending material has high elasticity and high strength, and the mechanical property is similar to the thermosetting rubber in a certain temperature range, and the material has plasticity at high temperature.
The Chinese patent No. 106398536A discloses an anionic water-based non-cured rubber asphalt waterproof coating, which consists of components A and B, wherein the component A consists of anionic rubber modified asphalt emulsion, anionic SBR latex, anionic neoprene latex, a water repellent and an impermeable agent, the component B consists of 10-30% of inorganic salt water solution, and the mass ratio of the component A to the component B is 5-15:1. the rubber elastomer used in the patent coating is one or more of styrene-butadiene-styrene ternary block copolymer SBS and its derivative hydrogenated SBS (SEBS) and styrene-isoprene-styrene; the prepared coating has higher stability, and can solve the problems of flexural fatigue or advanced aging under a high stress state, waterproof layer fracture caused by the transmission of base layer fracture stress to the waterproof layer, and the like.
According to the application, polybutadiene, ethylene propylene diene monomer rubber and SEBS rubber are used as the main components of the coating, saturated resin is used as film-forming resin, peroxide is used as a crosslinking auxiliary agent, and the anti-corrosion waterproof coating prepared based on the various main chain saturated resins has more excellent water vapor, chemical barrier property, weather resistance and corrosion resistance than the traditional epoxy coating, acrylic ester coating and polyurea resin coating on the market according to the content and the action of different saturated rubbers, has higher elastic modulus and tensile strength, and is suitable for coating walls, pipelines, tanks, water storage tanks, sewage disposal tanks and the like in the industries of construction, energy, electric power, transportation, chemical industry and the like.
Disclosure of Invention
Aiming at the problems existing in the prior art, the application provides an anti-corrosion waterproof coating based on various main chain saturated resins and a preparation method thereof, wherein polybutadiene, ethylene propylene diene monomer rubber and SEBS rubber are used as main components, peroxide is used as a crosslinking auxiliary agent, and the prepared coating has high elastic modulus, weather resistance, high/low temperature resistance, corrosion resistance and protection effect through mixing according to the content and mutual collocation action of different saturated rubbers, and is widely applied to the fields of construction, energy, electric power, traffic, chemical industry and the like.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
on one hand, the application provides an anti-corrosion waterproof coating based on various main chain saturated resins, which consists of a component A and a component B, wherein the component A comprises the following components in parts by weight:
polybutadiene rubber: 10-100 parts of a lubricant;
ethylene propylene diene monomer rubber: 10-100 parts of a lubricant;
hydrogenated styrene-butadiene block copolymer (SEBS): 1-15 parts; auxiliary crosslinking agent: 0.2-5 parts;
pigment and filler: 30-100 parts;
processing aid: 0.2-8 parts;
solvent: 40-100 parts;
the component B comprises the following components in parts by weight:
crosslinking agent: 0.5-50 parts;
and (3) a cocatalyst: 0.2-10 parts;
solvent: 10-100 parts of a lubricant;
the mass ratio of the component A to the component B is 10-100:1.
Preferably, the coating, component A, comprises the following components in parts by weight:
polybutadiene rubber: 10-50 parts of a lubricant;
ethylene propylene diene monomer rubber: 50-80 parts;
hydrogenated styrene-butadiene block copolymer: 3-10 parts;
auxiliary crosslinking agent: 2-5 parts;
pigment and filler: 60-100 parts;
processing aid: 1-3 parts;
solvent: 80-100 parts;
the component B comprises the following components in parts by weight:
crosslinking agent: 1-5 parts;
and (3) a cocatalyst: 0.5-5 parts;
solvent: 30-60 parts;
the mass ratio of the component A to the component B is 30-70:1.
Preferably, the polybutadiene rubber is 1, 2-polybutadiene.
Preferably, the vinyl content (wt%) of the polybutadiene rubber in the polybutadiene is more than or equal to 15%, and the molecular weight Mn of the polybutadiene rubber is between 1500 and 8000.
Preferably, in the ethylene propylene diene monomer, the third monomer is selected from at least one of 5-ethylidene-2-norbornene (ENB), 5-vinyl-2-norbornene (VNB), dicyclopentadiene (DCPD); the mass fraction of the third monomer is less than or equal to 15 percent.
Preferably, in the ethylene propylene rubber, the mass fraction of ethylene is 40-80%.
Further preferably, the mass fraction of ethylene is 45-75%.
Preferably, in the hydrogenated styrene-butadiene block copolymer (SEBS), styrene is present in an amount of 20 to 50% by weight of the SEBS.
Further preferably, in the SEBS, the styrene accounts for 20-35% of the SEBS by weight.
Preferably, the auxiliary crosslinking agent is selected from at least one of triallyl cyanurate (TAC), triallyl isocyanurate (TAIC), trimethylolpropane triacrylate (TMPTA), trimethylolpropane trimethacrylate (TMPTMA).
Further preferably, the auxiliary crosslinking agent is at least one selected from TAIC and TMPTA.
In the present application, the pigment and the filler may be those having undergone surface treatment with a silane coupling agent or those having not undergone surface treatment with a silane coupling agent.
In the present application, the pigment and the filler are pigments and fillers conventionally used in the art, and the kind and the proportion thereof are not limited. The pigment includes, but is not limited to, at least one of titanium dioxide, zinc oxide, lithopone, carbon black, iron-based pigments, chromate pigments, azo pigments, phthalocyanine pigments, polycyclic pigments, other metallic pigments, pearlescent pigments.
In the present application, the processing aid is a processing aid commonly used in the art, and the kind and the ratio thereof are not limited.
The processing aid includes, but is not limited to, at least one of a dispersant, a defoamer, a leveling agent, an anti-settling agent, an anti-aging agent, and a light stabilizer.
Preferably, the cross-linking agent is selected from at least one of dibenzoyl peroxide, dicumyl peroxide, tert-butyl peroxybenzoate, di-tert-butyl dicumyl peroxide, 2, 5-di-tert-butyl peroxy-2, 5-dimethylhexane, tert-butyl hydroperoxide, 2, 5-bis (2-ethylhexanoylperoxy) -2, 5-dimethylhexane, tert-butyl peroxy-3, 5 trimethylhexanoate, tert-butyl 2-ethylperoxyhexanoate.
Preferably, the promoter is selected from at least one of oxides, salts, organic acid soaps of cobalt, manganese, lead, iron, zinc and calcium.
Further preferably, the promoter is selected from at least one of cobalt, manganese, lead, iron, zinc and calcium naphthenates, isooctanoates.
Preferably, at least one of the solvent aromatic hydrocarbon and the solvent oil.
In the application, the solvent of the component A and the solvent of the component B are the same.
In another aspect, the present application provides a method for preparing the above-mentioned coating, comprising the steps of:
(1) Preparing a component A mixture: mixing polybutadiene rubber, ethylene propylene rubber and SEBS with a formula amount with a solvent at 40-100 ℃, dissolving, and stirring and mixing with a crosslinking assistant, pigment, filler and processing aid to form a coating glue solution;
(2) Preparing a mixture of components B: mixing and dissolving the cross-linking agent, the cocatalyst and the solvent uniformly in the formula amount of the component B to obtain a component B mixture;
(3) And uniformly mixing the mixture of the component A and the mixture of the component B according to the mass ratio of 10-100:1 to prepare the coating glue solution.
Preferably, in step (1), the temperature of the mixing is 50-85 ℃.
Further preferably, the temperature of the mixing is 60-80 ℃.
Preferably, in the step (1), the stirring and mixing are performed at a high speed, the stirring speed is 1000-3000r/min, and the stirring time is 10-15min.
Further preferably, the stirring speed is 1700-2200r/min.
Preferably, in the step (3), the mass ratio is 30-70:1.
Further preferably, the mass ratio is 45-55:1.
Still more preferably, the mass ratio is 50:1.
Preferably, in the step (3), the mixing is high-speed stirring mixing, and the rotating speed is 1000-3000r/min.
In the application, the prepared coating can be used for on-site addition of partial solvent according to specific construction requirements so as to adjust viscosity.
In the application, various polymers are used as matrix resin, and the adopted polymers lack polarity, and after peroxide crosslinking is carried out at room temperature, the chemical saturation is high, and the rubber performance can be reflected in a thin layer form. The coatings of the present application have excellent water, vapor, chemical barrier properties, and electrical insulation properties, all of which are advantages over the acrylic-based coating products currently in wide use. Meanwhile, the coating has excellent weather resistance and hydrophobicity, so that the coating becomes an excellent house ceiling coating material and is much better than the currently used acrylic-based coating. The good mechanical strength and the polar chemical resistance of the paint can be used as a corrosion-resistant paint, especially in low-temperature and high-humidity environments, the elasticity and the low surface tension enable the adhesive to be used as a protective material, the adhesive force between the adhesive and a base material is good, and the adhesive is far better than that of a silicon rubber coating, and the adhesive can become the current industrialized rubber coating.
The saturated resin coating based on various main chains has proper viscosity, can be applied by selecting different construction modes such as roller coating, spraying, brushing and the like according to the use places, and has reasonable construction time and surface drying time, simple storage mode and long shelf life.
The saturated resin coating based on various main chains has higher applicability in places such as pipelines, tanks, water storage tanks, pollution discharge tanks, outdoor ceiling coating materials and the like in the petrochemical industry.
Compared with the prior art, the application has the following beneficial effects:
1. in the coating, polybutadiene rubber, ethylene propylene diene monomer rubber and SEBS rubber are taken as main bodies, and are mixed according to a specific proportion to form a plurality of polymer matrix resins with saturated main chains, and after being mixed with other auxiliary cross-linking agents, pigments, fillers, processing aids, cross-linking agents, cocatalysts and solvents, the formed coating has excellent chemical resistance, water resistance, weather resistance, tensile elongation, elastic modulus, high-low temperature environment resistance and excellent bonding performance.
2. In the coating disclosed by the application, the polybutadiene rubber can play a role in enhancing the activity of the ethylene propylene diene monomer, so that the curing crosslinking degree and curing time of the coating are improved, and the viscosity of a system is further influenced, thereby adjusting the construction process.
3. In the coating, the hydrogenated styrene-butadiene block copolymer (SEBS) can play a role in adjusting the elasticity of a coating thin layer and the adhesion force between the coating thin layer and a base material, and further improves the application range and the adhesion performance of the ethylene propylene diene monomer coating.
Detailed Description
The following non-limiting examples will enable those of ordinary skill in the art to more fully understand the application and are not intended to limit the application in any way. The following is merely exemplary of the scope of the application as claimed and many variations and modifications of the application will be apparent to those skilled in the art in light of the disclosure, which are intended to be within the scope of the application as claimed.
The application is further illustrated by means of the following specific examples. The various chemical reagents used in the examples of the present application were obtained by conventional commercial means unless otherwise specified.
In the following examples, polybutadiene rubber is manufactured by Kuraray under the trade name LBR 361; ethylene Propylene Diene Monomer (EPDM) is Mitsui Elastomer, and the brand is EPT; SEBS, manufacturer is Korea polymer China company; TMPTA, the manufacturer is Shanghai America new material science and technology Co., ltd; silica, manufacturer Jin Sanjiang (culprit) silicon materials, inc; titanium dioxide, manufacturer is curtain chemistry, brand R350; the processing aid is selected from BYK110 and BYK065; the manufacturer is Shanghai Dun new material science and technology Co., ltd; the cocatalyst is manganese isozincate, and the manufacturer is long-wind chemical industry with the trade mark of 823-10; the solvent is No. 120 solvent oil, and the manufacturer is a dominant chemistry.
In the following examples, the preparation method of the coating comprises the following steps:
(1) Preparing a component A mixture: mixing polybutadiene rubber, ethylene propylene diene monomer rubber and SEBS with a formula amount with a solvent at 80 ℃, mixing the mixture with a crosslinking assistant, pigment, filler and processing aid after complete dissolution, and stirring at a high speed of 2000r/min by a high-speed stirrer until a stable mixture of a coating glue solution component A is formed;
(2) Preparing a mixture of components B: mixing the crosslinking agent, the cocatalyst and the solvent in the component B according to the formula amount, and uniformly stirring and dissolving to obtain a component B mixture;
(3) And uniformly mixing the mixture of the component A and the mixture of the component B according to the mass ratio of 50:1 under a high-speed stirrer of 2000r/min to prepare the coating glue solution.
And (3) preparing a coating: according to the required size of the test sample plate, a roller coating process is carried out to manufacture a test plate with specified size and thickness, curing is carried out for 7 days at 50 ℃, and then the related performance is tested.
Examples 1 to 3
The coating formulations of examples 1-3 are shown in Table 1 in parts by weight.
TABLE 1
The preparation method of the coating of the embodiment 1-3 comprises the following steps:
(1) Preparing a component A mixture: mixing polybutadiene rubber, ethylene propylene rubber and SEBS with a formula amount with a solvent at 80 ℃, mixing the mixture with a crosslinking assistant, pigment, filler and processing aid after complete dissolution, and stirring at a high speed of 2000r/min by a high-speed stirrer until a stable coating glue solution is formed;
(2) Preparing a mixture of components B: mixing the crosslinking agent, the cocatalyst and the solvent in the component B according to the formula amount, and uniformly stirring and dissolving to obtain a component B mixture;
(3) And uniformly mixing the mixture of the component A and the mixture of the component B according to the mass ratio of 50:1 under a high-speed stirrer of 2000r/min to prepare the coating glue solution.
Comparative examples 1 to 5
The coating formulations of comparative examples 1-5 are shown in Table 2 in parts by weight.
TABLE 2
The coatings of comparative examples 1-5 were prepared in the same manner as in example 1.
Performance test
The coatings obtained in the examples and the comparative examples were roll-coated according to the required dimensions of the test panels to prepare test panels of a specified size and thickness, cured at 50 ℃ for 7 days, and tested for the relevant properties.
The testing method of each performance of the paint comprises the following steps:
water resistance: reference GB/T16777-2008 test; the technical index of the water resistance detection is 0.3mpa and 120min.
Acid resistance: reference is made to GB/T9274-1988A method test; the technical index of the acid resistance detection is that the mixed solution of 5% hydrochloric acid and 5% sulfuric acid is soaked for 720 hours, and the detection is passed without the phenomena of foaming, rust, cracking and falling.
Chemical resistance: reference is made to GB/T9274-1988A method test; the chemical resistance detection technical index is that the chemical resistance detection passes through the detection after being soaked in 5% sodium nitrite solution for 720 hours and no bubbling, rust, cracking and falling phenomena occur.
Alkali resistance: reference is made to GB/T9274-1988A method test; the technical index of the alkali resistance detection is that the alkali resistance detection is soaked in 5% NaOH solution for 720 hours, and the alkali resistance detection is passed without the phenomena of foaming, rust, cracking and falling.
Weather resistance: reference GB/T1766-2008 test; the weather resistance technical index is 1500 hours, and the product can pass without foaming or falling off. Tensile strength and elongation at break: test with reference to ASTM D412;
adhesion to steel: test with reference to ASTM D4541;
criteria for 25 ℃ drying time: reference is made to GB/T1728 test;
the performance index test results of each example are shown in Table 3.
TABLE 3 Table 3
By comparison of the data in Table 3, the overall coating system is a non-polar saturated segment, and therefore has water resistance, weather resistance, because the host resin is a plurality of rubbers with saturated backbones.
Through the data comparison among the comparative examples 1,2 and 4, the polybutadiene rubber can improve the curing crosslinking degree of the paint, effectively improve the acid resistance, alkali resistance, chemical resistance and tensile strength of a paint film and reduce the drying time.
By comparing the data of comparative examples 1, 3 and 5, the SEBS can improve the elastic modulus of the paint film, effectively improve the elongation at break of the paint film and further improve the binding force of the paint film and steel.
By comparing the data of examples 1,2 and comparative example 1, polybutadiene rubber and SEBS have an interaction in the coating, and in order to improve the performance of one of them, it is necessary to have an appropriate addition amount of both.
By comparing the data in examples 3 and 4, TMPTA can be used as a cross-linking agent to further improve the curing and cross-linking degree of the paint, and under the condition of ensuring the paint film performance, the construction process is optimized.
Finally, it should be noted that the above description is only for illustrating the technical solution of the present application, and not for limiting the scope of the present application, and that the simple modification and equivalent substitution of the technical solution of the present application can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present application.

Claims (8)

1. The anticorrosive waterproof coating based on the various main chain saturated resins is characterized by comprising a component A and a component B, wherein the component A comprises the following components in parts by weight:
polybutadiene rubber: 10-15 parts of a lubricant;
ethylene propylene diene monomer rubber: 80 parts;
hydrogenated styrene-butadiene block copolymer: 5-10 parts;
auxiliary crosslinking agent: 0.2-5 parts;
pigment and filler: 30-100 parts;
processing aid: 0.2-8 parts;
solvent: 40-100 parts;
the component B comprises the following components in parts by weight:
crosslinking agent: 2 parts;
and (3) a cocatalyst: 0.2-10 parts;
solvent: 10-100 parts of a lubricant;
the mass ratio of the component A to the component B is 50:1;
the polybutadiene rubber is 1, 2-polybutadiene; the vinyl content in polybutadiene is more than or equal to 15 wt%, and the molecular weight Mn is 1500-8000;
the cross-linking agent is at least one selected from dibenzoyl peroxide, dicumyl peroxide, tert-butyl peroxybenzoate, di-tert-butyl dicumyl peroxide, 2, 5-di-tert-butyl peroxy-2, 5-dimethylhexane, tert-butyl hydroperoxide, 2, 5-di (2-ethylhexanoyl peroxy) -2, 5-dimethylhexane, tert-butyl peroxy-3, 5-trimethylhexanoate and tert-butyl 2-ethylperoxyhexanoate.
2. The coating according to claim 1, wherein the third monomer is at least one selected from the group consisting of 5-ethylidene-2-norbornene, 5-vinyl-2-norbornene, dicyclopentadiene; the mass fraction of the third monomer is less than or equal to 15 percent; in the ethylene propylene diene monomer, the mass fraction of ethylene is 40-80%.
3. The coating of claim 1, wherein the hydrogenated styrene-butadiene block copolymer comprises about 20 to about 50 weight percent styrene.
4. The coating of claim 1, wherein the co-crosslinking agent is selected from at least one of triallyl cyanurate, triallyl isocyanurate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate.
5. The paint of claim 1, wherein the pigment comprises at least one of titanium dioxide, zinc oxide, lithopone, carbon black, iron-based pigments, chromate pigments, azo pigments, phthalocyanine pigments, polycyclic pigments, pearlescent pigments; the filler comprises at least one of calcium carbonate, barium sulfate, silicon dioxide and silicate; the processing aid comprises at least one of dispersing agent, defoaming agent, leveling agent, anti-settling agent, anti-aging agent and light stabilizer.
6. The coating of claim 1, wherein the promoter is selected from at least one of cobalt oxide, manganese oxide, lead oxide, iron oxide, zinc oxide, calcium oxide, cobalt salts, manganese salts, lead salts, iron salts, zinc salts, calcium salts, cobalt organic acid soaps, manganese organic acid soaps, lead organic acid soaps, iron organic acid soaps, zinc organic acid soaps, calcium organic acid soaps.
7. The paint of claim 1, wherein the solvent is at least one selected from the group consisting of aromatic hydrocarbons and mineral spirits.
8. A method of preparing a coating as claimed in any one of claims 1 to 7, comprising the steps of:
(1) Preparing a component A mixture: mixing polybutadiene rubber, ethylene propylene diene monomer rubber and hydrogenated styrene-butadiene segmented copolymer with a formula amount with a solvent at 40-100 ℃, dissolving, and stirring and mixing with a crosslinking assistant, a pigment, a filler and a processing aid to form a coating glue solution;
(2) Preparing a mixture of components B: mixing and dissolving the cross-linking agent, the cocatalyst and the solvent uniformly in the formula amount of the component B to obtain a component B mixture;
(3) And uniformly mixing the mixture of the component A and the mixture of the component B according to the mass ratio of 50:1 to prepare the coating glue solution.
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