KR-102959438-B1 - Method for Manufacturing an Acrylic-Based Backside Waterproofing Sealant

KR102959438B1KR 102959438 B1KR102959438 B1KR 102959438B1KR-102959438-B1

Abstract

The present invention relates to a method for manufacturing an acrylic-based back-surface waterproofing agent capable of preventing shrinkage and enabling long-term storage, wherein the agent uses a multi-component composition including a porous filler and a viscoelastic modifier to prevent cracking and delamination caused by volume shrinkage occurring during the curing process, manufactures the agent in powder form to improve long-term storage and transport convenience, and restores it to a liquid state at the site to ensure excellent workability and pump injection capability. The method comprises: a polymer crosslinking composition generation step (S100) of preparing liquid A generated by homogeneously mixing and reacting water, acrylamide, boric acid, N,N'-methylenebisacrylamide, acrylic acid, ammonium persulfate, and hydroxyethyl methacrylate; and water, polyvinyl alcohol, acrylic acid, magnesium hydroxide, The method comprises: an inorganic reaction stabilizer generation step (S200) for preparing liquid B, which is produced by homogeneously mixing and reacting sodium persulfate and lithium silicate; a shrinkage-reducing composite formation step (S300) for preparing liquid C, which is formed by physically mixing Insuladd, a hollow ceramic particle-based thermal insulation material, and expandable polystyrene microparticles; and a waterproofing agent composition step (S400) for reducing shrinkage during the curing process and inducing crack prevention by mixing liquid A and liquid C by stirring them in advance, and then adding liquid B to the mixture.

Inventors

신현수
김해중
권경혁
안지현
구근우
신설화
오순란
권미화

Assignees

(주)썬시카티앤씨
주식회사 씨엠글로벌

Dates

Publication Date: 20260507
Application Date: 20250725

Claims (8)

A polymer crosslinking composition generation step (S100) for preparing a liquid A produced by homogeneously mixing and reacting water, acrylamide, boric acid, N,N'-methylenebisacrylamide, acrylic acid, ammonium persulfate, and hydroxyethyl methacrylate; an inorganic reaction stabilizer generation step (S200) for preparing a liquid B produced by homogeneously mixing and reacting water, polyvinyl alcohol, acrylic acid, magnesium hydroxide, sodium persulfate, and lithium silicate; and a shrinkage-reducing composite for preparing a liquid C formed by physically mixing Insuladd, a hollow ceramic particle-based thermal insulation material, and expandable polystyrene microparticles. A method for manufacturing a back-side waterproofing agent comprising: a forming step (S300); and a waterproofing agent composition step (S400) in which liquid A and liquid C are mixed by pre-stirring, and liquid B is added to the mixture to reduce shrinkage during the curing process and induce crack prevention, wherein The above liquid A (polymer crosslinking composition) is, A first component preparation step (S110) of preparing acrylamide, boric acid, methylenebisacrylamide, acrylic acid, ammonium persulfate, and hydroxyethyl methacrylate in a specified weight ratio; A basic mixing step (S120) of mixing and stirring a first component with deionized water to produce a first mixture; A preliminary reaction induction step (S130) in which a first mixture is reacted at 40~60℃ to induce a partial cross-linking reaction; A drying and pulverizing step (S140) in which moisture is removed from the reaction mixture by spray drying or freeze-drying to convert it into a powder; A storage and restoration step (S150) in which the manufactured powder is sealed and stored, and when used, it is redissolved in water to restore it to a liquid composition; A viscoelastic additive preparation step (S160) of preparing at least one of a polymer dispersant such as polyether-modified siloxane, a polyacrylate-based viscoelastic modifier, or polyvinylpyrrolidone (PVP) by weighing out at least 0.1 weight%; Addition and pre-mixing step (S170) in which a viscoelastic modifier is added to the components of liquid A before or during the mixing of the first component and uniformly dispersed through high-speed stirring; A reaction stabilization step (S180) in which a preliminary crosslinking reaction is performed under conditions of 40 to 60°C while a viscoelastic modifier is uniformly dispersed to provide viscosity stability and shrinkage reduction effects; A method for manufacturing an acrylic-based back-wall waterproofing agent capable of preventing shrinkage and long-term storage, further comprising the agent produced by.
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In paragraph 1, The above-mentioned Liquid B (inorganic reaction stabilizer) is, A second component preparation step (S210) of preparing polyvinyl alcohol, acrylic acid, magnesium hydroxide, sodium persulfate, and lithium silicate in a specified weight ratio; An inorganic mixing step (S220) of mixing and stirring the second component with deionized water to produce a second mixture; Viscosity stabilization reaction step (S230) in which the second mixture is reacted at 30~50℃ to stabilize viscosity and pH; A powder drying step (S240) for pulverizing the reaction mixture by spray drying or vacuum freeze-drying; A storage and re-dissolution step (S250) in which the finished powder is sealed and stored, and if necessary, mixed with water to restore it to a liquid auxiliary agent; A method for manufacturing an acrylic-based back-wall waterproofing agent capable of preventing shrinkage and long-term storage, comprising the agent produced by
In paragraph 1, The above C liquid (contraction-relieving complex) is, Insulation material weighing step (S310) for weighing a hollow structure ceramic particle-based insulation material (insulated) based on weight; A microparticle weighing step (S320) of weighing expandable polystyrene microparticles at a weight ratio of 1:3 to 1:5 relative to Insulated; A raw material input step (S330) of introducing the two above components into a high-speed mixer; A homogeneous stirring step (S340) of stirring and mixing for 30 minutes using a high-shear mixer; A viscosity adjustment step (S350) for adjusting the flow characteristics of the composition by adding a small amount of water or a viscosity modifier as needed; A porosity adjustment step (S360) for adjusting the porosity of the final mixture to 25-35% to ensure shrinkage prevention during curing; A method for manufacturing an acrylic-based back-wall waterproofing agent capable of preventing shrinkage and long-term storage, comprising the agent produced by
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In paragraph 3, The above liquid B is, An auxiliary additive preparation step (S260) of preparing one or more of a water-soluble polymer dispersant or a silicone-based viscosity modifier in a ratio of 0.1 to 0.5 weight%; A mixing addition step (S270) in which the above additive is mixed together with the B liquid composition or added during an intermediate reaction stabilization step and high-speed stirring is performed; A curing reaction control step (S280) that maintains curability while uniformly incorporating auxiliary additives, and provides a physical buffering effect to prevent shrinkage and stress concentration from occurring during curing of the final product; A method for manufacturing an acrylic-based back-wall waterproofing agent capable of preventing shrinkage and long-term storage, further comprising the agent produced by.
In paragraph 1, A method for manufacturing an acrylic-based back-wall waterproofing agent capable of preventing shrinkage and long-term storage, comprising adding 5% to 15% by weight of a porous filler to the above-mentioned liquid A to inhibit shrinkage and improve injectability.
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Description

Method for Manufacturing an Acrylic-Based Backside Waterproofing Sealant Capable of Shrinkage Prevention and Long-term Storage The present invention relates to a manufacturing technology for an acrylic waterproofing agent that effectively blocks the penetration of external moisture and groundwater by being applied to various concrete structures such as foundations of buildings and civil engineering structures, underground exterior walls, rooftops, retaining walls, tunnels, and underground parking lots. More specifically, the invention relates to a method for manufacturing an acrylic back-side waterproofing agent capable of preventing shrinkage and enabling long-term storage, which uses a multi-component composition including a porous filler and a viscoelastic modifier to prevent cracking and delamination caused by volume shrinkage during the curing process, manufactures the composition in powder form to improve long-term storage and transport convenience, and restores it to a liquid state at the site to ensure excellent workability and pump injection capability. Recently, there has been a surge in demand for waterproofing technologies to enhance the water resistance and durability of structures in the fields of architecture and civil engineering. In particular, there is active development of water-blocking waterproofing technologies capable of effectively blocking the penetration of moisture and groundwater in concrete structures, such as underground structures, rooftops, retaining walls, and foundation slabs. Acrylic waterproofing agents, which are one such technology, are widely used because they are water-soluble and can be easily applied to various structures based on their excellent adhesion and elasticity. However, conventional acrylic waterproofing agents frequently suffer from reduced waterproofing performance due to volume shrinkage caused by moisture evaporation or chemical reactions during the curing process, which leads to cracking or delamination. This problem is particularly pronounced when applied to thin-film structures or curved surfaces, and cracks often progress over time due to stress concentration even after curing. In this regard, Registered Patent Publication No. 10-1333157 "Acrylic-based waterproofing liquid composition" and Registered Patent Publication No. 10-0272948 "Silicate-based powder-type coating waterproofing agent" have been published. The above-mentioned registered patent publication No. 10-1333157, "Acrylic waterproofing liquid composition," is a technology that induces a waterproofing effect penetrating into the interior of a structure by providing a two-component waterproofing composition that can be injected into cracks by adding microcement to an acrylic monomer in a certain weight ratio. However, it has limitations in that it does not include technology to address cracking or delamination phenomena that may occur due to volume shrinkage or stress concentration during the curing process, and it does not apply powdering technology to ensure the long-term storage stability of the composition or for on-site restoration. Furthermore, the aforementioned registered patent publication No. 10-0272948, "Silicate-based powder-type coating waterproofing agent," is a technology that uses a waterproofing agent manufactured in a dried form by mixing it with water on-site. This technology applies a powdering method to improve the inconvenience of storing liquid waterproofing agents and to increase flexibility in on-site construction. While it has advantages in terms of storability and transportability, it does not include viscoelasticity control technology or the application of a porous filling structure to reduce shrinkage or relieve stress during the curing of the waterproofing layer. In other words, while existing technologies each possess some advantages, they have limitations in achieving an integrated implementation of controlling curing shrinkage, stress distribution, ensuring constructability and injectability, and improving storability through pulverization. Therefore, since cracking and delamination caused by shrinkage during the curing of acrylic waterproofing agents not only severely degrade waterproofing performance but can also lead to a shortened lifespan of structures, it is essential to develop a composite functional waterproofing agent that can fundamentally resolve this issue while simultaneously ensuring workability, storage stability, and injectability. FIG. 1 is a flowchart of a method for manufacturing an acrylic-based back-side waterproofing agent constructed according to a preferred embodiment of the present invention. Hereinafter, the structure of the present invention and the resulting operation and effects will be described collectively with reference to the attached drawings. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the