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CN-121991564-A - Composition for two-component waterproof coating, two-component waterproof coating and preparation method thereof

CN121991564ACN 121991564 ACN121991564 ACN 121991564ACN-121991564-A

Abstract

The invention relates to the field of waterproof coatings, and discloses a composition for a bi-component waterproof coating, a bi-component waterproof coating and a preparation method of the bi-component waterproof coating. The composition comprises a component A and a component B in a mass ratio of 1:0.5-1.5, wherein the component A comprises a main agent I and an auxiliary agent I, the main agent I contains polyether hybrid resin, an epoxy resin curing agent, a filler I, a silane coupling agent I and a catalyst, the component B comprises a main agent II and an auxiliary agent II, the main agent II contains epoxy resin, a plasticizer, a filler II and water, and the polyether hybrid resin is prepared by in-situ synthesis of raw materials comprising silane modified polyether resin I, an acrylic monomer, silane modified polyether resin II, a chain transfer agent, an initiator, a chain extender and silane coupling agent II. The waterproof coating prepared by the composition can resist a wet basal plane, can be quickly cured and forms a high-strength high-adhesion coating.

Inventors

  • WANG GANG
  • HE HONGLIN
  • WANG XIANJUN

Assignees

  • 科顺防水科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260226

Claims (10)

  1. 1. A composition for a two-component waterproof coating is characterized by comprising a component A and a component B in a mass ratio of 1:0.5-1.5; the component A comprises a main agent I and an auxiliary agent I, wherein the main agent I contains polyether hybrid resin, epoxy resin curing agent, filler I, silane coupling agent I and catalyst, and based on the total weight of the component A, the component A contains 30-45 wt% of polyether hybrid resin, 8-12 wt% of epoxy resin curing agent, 40-45 wt% of filler I, 1-3 wt% of silane coupling agent I and 0.1-0.5 wt% of catalyst; The component B comprises a main agent II and an auxiliary agent II, wherein the main agent II contains epoxy resin, plasticizer, filler II and water, and based on the total weight of the component B, the component B contains 30-50wt% of epoxy resin, 3-8wt% of plasticizer, 30-50wt% of filler II and 5-15wt% of water; The polyether hybrid resin is prepared by in-situ synthesis of raw materials comprising silane modified polyether resin I, acrylic monomers, silane modified polyether resin II, a chain transfer agent, an initiator, a chain extender and silane coupling agent II, wherein the silane coupling agent II contains terminal vinyl or acryloyloxy, the viscosity of the silane modified polyether resin I is lower than that of the silane modified polyether resin II, and the dosage and mass ratio of the silane modified polyether resin I to the silane modified polyether resin II is 1:1-1.5.
  2. 2. The composition according to claim 1, wherein the silane-modified polyether resin I has a viscosity at 23 ℃ of 1000-2500 mPa s; and/or the viscosity of the silane modified polyether resin II at 23 ℃ is 2-4 mPa.s.
  3. 3. The composition of claim 2, wherein the in situ synthesis comprises: s1, carrying out polymerization reaction on the silane modified polyether resin I, the acrylic monomer, the silane coupling agent II, the chain transfer agent and the initiator to obtain an intermediate; S2, mixing the intermediate, the chain extender and the silane modified polyether resin II to obtain the polyether hybrid resin.
  4. 4. The composition according to claim 3, wherein in step S1, the silane-modified polyether resin I, the acrylic monomer, the silane coupling agent II, the chain transfer agent and the initiator are used in a mass ratio of 100:30 to 60:0.5 to 5:0.3 to 2:0.5 to 4; And/or in the step S2, the dosage mass ratio of the silane modified polyether resin II to the chain extender is 1:0.5-0.15; And/or, in the step S1, the polymerization reaction conditions comprise a temperature of 60-100 ℃ and a time of 2-3h.
  5. 5. The composition of claim 3, wherein the silane modified polyether resin I is selected from at least one of wacke er E905, GENIOSIL XT50, GENIOSIL XB502, 100D of rayleigh; And/or the silane modified polyether resin II is selected from at least one of WACKER cube E10, WACKER cube E925 and 12000DS of Ruiyangtai of Wake chemistry; And/or the acrylic monomer is at least one selected from methyl methacrylate, butyl acrylate, isooctyl acrylate, methacrylic acid, hydroxyethyl acrylate, glycidyl methacrylate, ethyl acrylate, propyl acrylate, ethyl methacrylate, propyl methacrylate, hydroxypropyl acrylate, hydroxybutyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, hydroxybutyl methacrylate, glycidyl acrylate; And/or the silane coupling agent II is selected from one or more of vinyl trimethoxy silane, 3-acryloxy triethoxy silane, 3-acryloxy propyl methyl dimethoxy silane, 3-acryloxy propyl dimethyl methoxy silane, gamma-methacryloxy propyl trimethoxy silane, gamma-methacryloxy propyl methyl dimethoxy silane, gamma-methacryloxy propyl triethoxy silane and 3-methacryloxy propyl triisopropoxy silane; And/or the chain transfer agent is at least one selected from isooctyl 3-mercaptopropionate, dodecyl mercaptan and alpha-methylstyrene dimer; And/or the initiator is at least one selected from azodiisobutyronitrile, tert-butyl peroxy-2-ethylhexanoate and benzoyl peroxide; And/or the chain extender is at least one selected from diphenyl dimethoxy silane, dimethyl dimethoxy silane, methyl trimethoxy silane and phenyl trimethoxy silane.
  6. 6. The composition according to any one of claims 1 to 5, wherein the auxiliary agent I comprises an accelerator, an antifoaming agent I and a leveling agent, wherein the A component comprises 0.2 to 1.0wt% of the accelerator, 1 to 2wt% of the antifoaming agent I and 0.1 to 0.6wt% of the leveling agent based on the total weight of the A component; and/or the auxiliary agent II comprises an antifoaming agent II and a wetting agent, wherein the B component contains 0.5-4wt% of the antifoaming agent II and 0.2-0.5wt% of the wetting agent based on the total weight of the B component.
  7. 7. The composition of claim 6, wherein the accelerator is 1, 4-diazabicyclo [2.2.2] octane; And/or, the defoaming agent I and the defoaming agent II are respectively and independently selected from at least one of organic silicon defoaming agents, polyether defoaming agents, organic fatty acid defoaming agents and organic fatty ester defoaming agents.
  8. 8. The composition of any of claims 1-5, wherein the epoxy resin curing agent is a phenolic amine curing agent and/or a polyamide curing agent; and/or the epoxy resin is E-44 epoxy resin and/or E-51 epoxy resin; And/or the plasticizer is dioctyl phthalate and/or a bio-based plasticizer; and/or the filler I and the filler II are respectively and independently selected from at least one of heavy calcium carbonate, quartz powder and talcum powder; And/or, the catalyst is dibutyl tin dilaurate; And/or the silane coupling agent I is epoxy silane and/or amino silane.
  9. 9. A process for preparing a two-component water-repellent coating, characterized in that it is carried out using the components of the composition according to any one of claims 1 to 8, comprising: And stirring and mixing the component A and the component B to obtain the double-component waterproof coating.
  10. 10. A two-component waterproof coating prepared by the method of claim 9.

Description

Composition for two-component waterproof coating, two-component waterproof coating and preparation method thereof Technical Field The invention relates to the technical field of waterproof coatings, in particular to a composition for a bi-component waterproof coating, a bi-component waterproof coating and a preparation method thereof. Background In construction engineering, the waterproof treatment of a concrete base surface is a crucial link. Conventional cement-based penetrating crystalline waterproof paint or solvent-type waterproof paint has many limitations in practical construction. For example, solvent-based products contain significant amounts of Volatile Organic Compounds (VOCs), are environmentally friendly and are hazardous to the health of construction personnel, while most reactive water-resistant coatings (e.g., polyurethane, epoxy coatings) are extremely demanding on the dryness of the construction base, often requiring water contents below 8% and even lower. However, in actual construction, especially in basement, tunnel, pool, rainy season construction, etc., the base surface is often difficult to reach a completely dry state, and waiting for the base surface to dry can severely delay the construction period. In the prior art, although some products are declared to be applicable to a wet base surface, the problems of (1) low curing speed, low adhesive strength retention rate and easy swelling and stripping of the cured coating in a long-term water immersion environment, and (2) low final strength, wherein the curing reaction is interfered by water molecules in the wet environment to cause excessive surface drying and real drying time to affect subsequent procedures, the water molecules obstruct sufficient crosslinking of film forming substances to cause insufficient strength and hardness of a film, and the durability is poor, and (3) the adhesive strength is reduced, the water molecules form an isolation layer between the base surface and the coating to cause obvious reduction of the adhesive strength and easy peeling and falling off are generally solved. Therefore, the development of the waterproof material which can not only resist a wet basal plane, but also be quickly cured and form a high-strength high-adhesion coating has great practical application value. Disclosure of Invention The invention aims to provide a waterproof material which can resist a wet basal plane, can be quickly cured and forms a high-strength high-adhesion coating. In order to achieve the above object, a first aspect of the present invention provides a composition for a two-component waterproof coating material, the composition comprising an a component and a B component in a mass ratio of 1:0.5 to 1.5; the component A comprises a main agent I and an auxiliary agent I, wherein the main agent I contains polyether hybrid resin, epoxy resin curing agent, filler I, silane coupling agent I and catalyst, and based on the total weight of the component A, the component A contains 30-45 wt% of polyether hybrid resin, 8-12 wt% of epoxy resin curing agent, 40-45 wt% of filler I, 1-3 wt% of silane coupling agent I and 0.1-0.5 wt% of catalyst; The component B comprises a main agent II and an auxiliary agent II, wherein the main agent II contains epoxy resin, plasticizer, filler II and water, and based on the total weight of the component B, the component B contains 30-50wt% of epoxy resin, 3-8wt% of plasticizer, 30-50wt% of filler II and 5-15wt% of water; The polyether hybrid resin is prepared by in-situ synthesis of raw materials comprising silane modified polyether resin I, acrylic monomers, silane modified polyether resin II, a chain transfer agent, an initiator, a chain extender and silane coupling agent II, wherein the silane coupling agent II contains terminal vinyl or acryloyloxy, the viscosity of the silane modified polyether resin I is lower than that of the silane modified polyether resin II, and the dosage and mass ratio of the silane modified polyether resin I to the silane modified polyether resin II is 1:1-1.5. In a second aspect the present invention provides a method of preparing a two-component water-repellent coating using the components of the composition of the first aspect described above, comprising: And stirring and mixing the component A and the component B to obtain the double-component waterproof coating. A third aspect of the present invention provides a two-component waterproof coating material prepared by the method of the foregoing second aspect. The polyether hybrid resin in the component A in the composition for the double-component waterproof coating can rapidly generate hydrolysis reaction with water in the component B and base surface moisture under the action of a catalyst, and is bonded with hydroxyl on the surface of a construction base material, so that rapid curing and ultrahigh adhesion to a wet base surface are realized, the reaction path is not inhibited by moisture, in addition, the e