KR20180018878A - Waterproof system with its surface chemically reacting with a reactant of polyurethane - Google Patents

Abstract

The present invention relates to a waterproof system in which a waterproof sheet layer and a polyurethane film waterproof layer are combined and, more specifically, to a waterproof system having an integrated chemical bond between the surface of a waterproof sheet layer and a polyurethane film waterproof layer as the surface of the waterproof sheet layer is not coated with a bonding agent combined with polyurethane but forms a chemical bond with a bonding agent applied to the surface of the waterproof sheet layer and a chemical bond between the bonding agent and the polyurethane film waterproof layer occurs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof system for chemically reacting with a polyurethane reactant,

The present invention relates to a method for chemical bonding between a waterproof sheet surface and a polyurethane coating film and a chemical adhesive therebetween in the manufacture of a waterproofing system combined with waterproofing of a sheet waterproofing polyurethane coating film through a chemical bonding method between a waterproof sheet surface and a polyurethane coating film will be.

Concrete structure is a complex structure, and its durability is deteriorated due to its physical and chemical properties. Decrease of durability of concrete structure is a phenomenon accelerating cracks, penetration of rainwater, corrosion of reinforcing steel and expansion of structure . In particular, the behavior and cracks of concrete have been exposed to the risk of defects such as the waterproof sheet being inflated or broken due to the stress transmitted to the combined waterproof layer. The waterproof sheet is connected to the waterproof layer combined with the behavior of the structure, and the waterproof sheet is inflated or broken. Therefore, irrespective of cracks or deterioration of concrete, the waterproof layer is required to have a waterproofing material and a waterproofing method which can stably maintain its waterproof performance continuously.

As for the waterproofing materials and waterproofing technology trend, there are asphalt waterproofing materials, mortar waterproofing, synthetic rubber sheet waterproofing, vinyl chloride sheet waterproofing and improved asphalt sheet waterproofing, and waterproofing materials used for slabs are urethane, acrylic Rubber, rubber asphalt, and acrylic resin. The properties of modified asphalt with the addition of polymer to asphalt appear in various forms depending on the properties of polymer, properties of asphalt, mixing conditions and compatibility of asphalt. The asphalt (asphalt waterproof sheet) coated on the waterproof sheet base material has a stiffness at a low temperature due to a change in physical temperature, cracks (or cracks) are generated and leakage occurs, and at high temperatures, And there is a characteristic that it flows down. Therefore, the development of a modified asphalt waterproof sheet or a modified asphalt for a waterproof coating film which generates less cracking due to flexibility at a low temperature and has a stiffness at a high temperature and a low plastic deformation occurs, is applied to the field .

In most waterproofing materials and construction methods, waterproofing of modified asphalt sheet, synthetic polymer sheet is used for sheet waterproofing, and urethane-based waterproofing is used for coating waterproofing. The currently used urethane waterproofing agent is the most used product as a waterproofing agent for construction, and it has good physical properties but it is not suitable for cracking of concrete structure and cracked structure. Therefore, if the construction surface is not completely dried, residual water vapor pressure The lifting of the coating film occurs. In principle, if the water content of the concrete is 8% or more, the waterproofing of the film can not be performed. On the other hand, the problem of sheet waterproofing is that frequent lifting or peeling occurs at joints between the sheets and the sheet material is sensitive to temperature, which affects the work during the winter and summer, and it is difficult to work at the time of construction of complicated parts. Further, since the waterproof sheet and the surface of the structure do not adhere to each other and float, a waterproofing problem may occur.

In order to solve this problem, a waterproof system combined with a waterproof sheet and a polyurethane film is used in the market, but it relies on physical methods such as adhesion between the nonwoven fabric or the surface layer of the waterproof sheet and the polyurethane coating. Specifically, in the waterproof sheet layer composed of the nonwoven fabric layer, the central base layer positioned above the nonwoven fabric layer, and the surface layer positioned above the central base layer according to Japanese Patent Publication No. 10-1600072 (published on March 15, 2016) In the case of the included core substrate layer, the polyurethane reaction is induced between the nonwoven fabric layer and the core substrate layer by using the nonwoven fabric layer coated with the amine compound on the waterproofing sheet layer to integrate the waterproof sheet layer, The polyurea reaction is induced between the nonwoven fabric layer and the lower waterproof coating material layer using the non-woven fabric layer coated with the amine-based compound in the case where the coating material layer is located under the waterproof sheet layer to improve the adhesive force between the waterproof coating material layer and the waterproof sheet layer . However, a general process for coating an amine compound on a nonwoven fabric layer is a physical coating process using a roll coater or a spray coater. In particular, the coating and physical adhesion characteristics of the amine-based compound on the nonwoven fabric layer are determined depending on the characteristics of the amine-based compound and the solvent used to dissolve the amine-based compound. However, when the amine-based compound and the polyethylene, polypropylene or poly (ethylene terephthalate) It is generally difficult to have compatibility with a polyester nonwoven fabric. In Patent Document 10-1600072 (published on March 15, 2016), the coating method and the amine compound to be used and the solvent therefor are not specified. Nonetheless, Announcement No. 10-1600072 (published on March 15, 2016) discloses a nonwoven fabric layer coated with an amine compound in a waterproofing system combining sheet waterproofing and polyurethane film waterproofing, And physical attachment of the film.

The upper or lower surface of the waterproof sheet layer physically adhered to the polyurethane coating film is mainly made of poly (ethylene terephthalate) (PET) polyester nonwoven fabric rather than polyethylene or polypropylene. However, since the PET polyester nonwoven fabric is also hydrophobic, it is inferior in compatibility with the urethane polar group-containing polyurethane, so that peeling occurs necessarily after mutual adhesion. This is because the mutual adhesion surface of the waterproof sheet surface and the polyurethane coating film are easily separated, And waterproofing system that combines waterproofing of polyurethane film and waterproofing of polyurethane film.

Accordingly, an object of the present invention is to provide a waterproofing system in which a waterproof sheet layer and a polyurethane coating film waterproofing material layer are combined with a waterproofing sheet layer surface, And the chemical bonding between the applied binder and the polyurethane coating film waterproofing material layer occurs so that an integrated chemical bonding between the surface of the waterproof sheet and the polyurethane coating waterproofing material layer is achieved.

The above object of the present invention

Generating a hydroxyl group (-OH) on the surface of the waterproof sheet layer; The urethane or urethane bond is formed by direct urethane bonding of the hydroxyl group (-OH) obtained in the above step with the diisocyanate of the coating film waterproof layer, or via alkoxy silane of the silane coupling agent And a waterproofing system in which a sheet waterproofing material and a coating film waterproofing material layer are integrally and chemically combined.

The most common problems or defects in waterproofing methods such as waterproofing materials, waterproofing of sheets, waterproofing of sheets, and waterproofing of sheets are cracks and tearing of coating films and breakage of sheet joints. The above problems or defects are largely caused by a lack of responsiveness of the coating to the behavior of the concrete base surface, a difference in water resistance between the waterproof sheet material and the joint material, and a weakening of the adhesion at the waterproof sheet joint. In order to solve this problem, a waterproof system combining sheet waterproofing and polyurethane film waterproofing has been used in the market, but it relies on physical methods such as adhesion strength between the surface of the waterproof sheet layer and the polyurethane film material. The surface of the waterproof sheet layer, which is physically adhered to the polyurethane film, is mainly made of poly (ethylene terephthalate) (PET) polyester nonwoven fabric rather than polyethylene or polypropylene. However, PET polyester nonwoven fabric is also hydrophobic, It is inferior in compatibility with urethane and peeling occurs necessarily after mutual adhesion. In order to overcome such a problem, the waterproof sheet system has a problem that the surface of the waterproof sheet layer and the mutual adhesion surface of the polyurethane coating film are easily separated, And waterproofing the polyurethane film, waterproofing system having integrated chemical bonding between the surface of the waterproofing sheet layer and the polyurethane film material is produced. Further, the present invention has the effect of waterproofing the waterproofing and polyurethane film waterproofing The surface of the waterproof sheet layer in the system is chemically bonded to the binder to which the surface of the waterproof sheet layer is applied and not to the surface of the waterproof sheet layer coated with the binder for bonding with the polyurethane, and chemical bonding between the applied binder and the polyurethane film- The sheet layer surface and the polyurethane coating film waterproofing material layer Characterized in that for the production of a water system is integrated chemical bond formed it has an excellent effect.

FIG. 1 is a diagram showing the urethane reaction of an upper layer having a hydroxyl group (-OH) modified with a surface and an isocyanate producing urethane of a waterproof coating layer in contact with the upper layer.
FIG. 2 is a schematic cross-sectional view of a surface-modified upper layer and a silane coupling agent which chemically react and bind to each other, a functional group 6 of a linker end of the chemically bonded silane coupling agent, (In the case of an amine group [silane coupling agent functional group]) or urethane reaction (in the case of a hydroxyl group formed by ring opening reaction of an epoxy group [silane coupling agent functional group]).
FIG. 3 is a diagram showing the urethane reaction of an upper layer having a hydroxyl group (-OH) and a hydroxyl group (-OH) and an isocyanate forming a urethane of the central base layer in contact therewith.

In the present invention, in the waterproofing system in which the waterproof sheet layer and the polyurethane coating film waterproofing material layer are combined, the surface of the waterproof sheet layer is chemically bonded with the binder to which the surface of the waterproof sheet layer is applied, A chemical bonding between the applied binder and the polyurethane coating film waterproofing material layer occurs to produce a waterproofing system in which an integrated chemical bonding between the waterproof sheet layer surface and the polyurethane coating film waterproofing material layer is performed. More specifically, the waterproof sheet layer 5 made of the central base layer 1, the upper layer 2 above the central base layer and the lower layer 3 below the central base layer is produced, [1] A sheet or a nonwoven fabric layer made of a polymer material including polyethylene, polypropylene, or poly (ethylene terephthalate) (PET) polyester, or [2] a modified asphalt material or a butyl rubber material or a urethane material or a modified asphalt / (3) a sheet or nonwoven fabric layer made of a polymer material including polyethylene, polypropylene or poly (ethylene terephthalate) (PET) polyester, or a waterproof coating material layer A modified asphalt waterproofing layer or a butyl rubber waterproofing layer or a polyurethane waterproofing layer or a modified asphalt / urethane hybrid waterproofing layer or a butyl rubber / urethane hybrid waterproofing layer It will be coated. The upper layer 2 and the lower layer 3 are sheets or nonwoven layers of a polymeric material comprising a sheet or nonwoven layer comprising polyethylene, polypropylene or poly (ethylene terephthalate) (PET) polyester.

In the waterproof sheet layer 5, the upper layer 2 or the lower layer 3, or the upper layer 2 and the lower layer 3 may have a polar functional group containing a hydroxyl group (-OH) The present invention is primarily achieved by producing a waterproof sheet layer (5). More specifically, a polyurethane coating film waterproofing material layer or a hybrid coating film waterproofing material layer of modified asphalt and polyurethane or a hybrid coating film waterproofing material layer of butyl rubber and polyurethane is laminated on the upper, lower, or upper and lower portions of the waterproof sheet layer 5 The waterproof sheet layer 5 or; A hybrid coating film waterproofing material layer of the polyurethane coating material waterproofing material layer or modified asphalt and polyurethane or a hybrid coating film waterproofing material layer of butyl rubber and polyurethane is formed as a component constituting the central base material layer 1 and is in contact with the upper layer 2 or the lower layer 3 In the waterproof sheet layer (5); The upper layer 2 or the lower layer 3 or the upper layer 2 and the lower layer 3 have a polar functional group containing a hydroxyl group (-OH) on the surface in contact with the polyurethane.

The polar functional group comprising the upper layer 2 or the lower layer 3 or the hydroxyl group (-OH) on the surface of the upper layer 2 and the lower layer 3 may be the upper layer 2 or the lower layer 3, The present invention includes those in which the upper layer 2 and the lower layer 3 are modified through surface modification. The surface modification is carried out by methods such as corona discharge, plasma discharge, glow discharge, and primer treatment. The primer treatment is carried out by applying and drying a primer coating agent, an undercoating agent or an anchor coating agent on the surface of the upper layer 2 or the lower layer 3 or the surface of the upper layer 2 and the lower layer 3.

The above object of the present invention can also be achieved by a process for producing a polyurethane by reacting the hydroxyl group (-OH) on the surface of the upper layer 2 or the lower layer 3 or the surface of the upper layer 2 and the lower layer 3 with a diisocyanate di -isocyanate) is secondarily achieved by urethane bonding. As another method, an amine group (-NH ₂ ) is added to the hydroxyl group (-OH) on the surface of the upper layer 2 or the lower layer 3 or the surface of the upper layer 2 and the lower layer 3 to form a linker An alkoxy silane reactor of a silane coupling agent having a functional group at the end reacts and bonds; A diisocyanate which is a reactant for producing a polyurethane and the amine group (-NH ₂ ) which is a functional group of the silane coupling agent bonded to the upper layer 2 or the lower layer 3 or the surface of the upper layer 2 and the lower layer 3 Di-isocyanate is secondarily achieved by urea bonding. APS (amino-propyl-triethoxy silane) is a typical silane coupling agent.

The above object of the present invention can also be achieved by a method of manufacturing a semiconductor device in which an epoxy group is linked to a hydroxyl group (-OH) on the surface of the upper layer 2 or the lower layer 3 or the surface of the upper layer 2 and the lower layer 3 by a linker ), An alkoxy silane reactor of a silane coupling agent having a functional group reacts and binds; The epoxy group, which is a functional group of the silane coupling agent bonded to the surface of the upper layer 2 and the lower layer 3, is opened under an acidic condition to have two hydroxyl groups (-OH); The hydroxyl group (-OH) is achieved secondarily by the urethane bond of diisocyanate, which is a reactant for producing polyurethane. GPTMS (3-glycidoxypropyltrimethoxysilane) is a typical silane coupling agent. In the present invention, a waterproof system is provided by the method of any one of the above.

1. Central substrate layer
2. Upper layer
3. Lower layer
4. Waterproof coating layer
5. Waterproof sheet layer
6. The functional group (amine group or epoxy group) located at the linker end of the silane coupling agent reacted with the hydroxyl group (-OH)
7. Linker

Claims (14)

The waterproof sheet layer 5 is composed of the central base layer 1, the upper layer 2 above the central base layer 1 and the lower layer 3 below the central base layer 1;
A waterproof sheet layer 5 composed of a polyurethane coating film waterproofing material layer or a hybrid film waterproofing material layer of modified asphalt and polyurethane or a mixed film waterproofing material layer of butyl rubber and polyurethane laminated on the upper, lower or upper part of the waterproofing sheet layer 5 ) or;
A hybrid coating film waterproofing material layer of the polyurethane coating material waterproofing material layer or modified asphalt and polyurethane or a hybrid coating film waterproofing material layer of butyl rubber and polyurethane is formed as a component constituting the central base material layer 1 and is in contact with the upper layer 2 or the lower layer 3 In the waterproof sheet layer (5);
Wherein the upper layer 2 or the lower layer 3 or the upper layer 2 and the lower layer 3 have polar functional groups including a hydroxyl group .
The method according to claim 1, wherein the hydrophilic functional group comprising the upper layer (2) or the lower layer (3) or the hydroxyl group (-OH) on the surface of the upper layer (2) Wherein the lower layer (3) or the upper layer (2) and the lower layer (3) are subjected to surface modification.
The method of claim 2, wherein the surface modification is generated by any one of corona discharge, plasma discharge, and glow discharge.
The waterproofing system according to claim 1, wherein the upper layer (2) and the lower layer (3) are a polymeric sheet or nonwoven fabric layer comprising polyethylene, polypropylene or poly (ethylene terephthalate) Way.
The method according to claim 1, wherein the upper layer (2) or the lower layer (3) or the hydroxyl group (-OH) on the surface of the upper layer (2) and the lower layer (3) Wherein the diisocyanate, which is a reactant for producing urethane, is urethane-bonded.
The method according to claim 1, wherein an alkoxy silane reactor of a silane coupling agent is added to the upper layer (2) or the lower layer (3) or the hydroxyl group (-OH) on the surface of the upper layer (2) And then reacting and bonding the waterproof system.
The method according to claim 6, wherein the silane coupling agent has an amine group (-NH ₂ ) as a functional group.
7. The method according to claim 6, wherein the silane coupling agent has an epoxy group as a functional group.
The method of claim 7, wherein the silane coupling bond, and wherein the amine group (-NH ₂₎ functional groups of the agent, the reaction of an isocyanate Dia (di-isocyanate) to produce the amine group is in contact with the polyurethane (-NH ₂₎ urea Wherein said waterproofing system comprises:
The epoxy resin composition according to claim 8, wherein the epoxy group, which is a functional group of the silane coupling agent, is opened under an acidic condition to have two hydroxyl groups (-OH);
Wherein the hydroxyl group (-OH) is urethane-bonded to a diisocyanate, which is a reactant for producing a polyurethane that is in contact with the hydroxyl group (-OH).
The method according to any one of claims 6, 7, and 9, wherein the silane coupling agent is APS (amine propyltriethoxysilane).
11. The method according to any one of claims 6, 8 and 10, wherein the silane coupling agent is 3-glycidoxypropyltrimethoxysilane (GPTMS).
2. The method of claim 1, wherein the central base layer (1) comprises:
A sheet or non-woven layer of a polymer material comprising polyethylene, polypropylene or poly (ethylene terephthalate) (PET) polyester;
A waterproof coating material layer (4) of a modified asphalt material or a butyl rubber material or a polyurethane material or a modified asphalt / urethane hybrid material or a butyl rubber / urethane hybrid material;
A modified asphalt waterproofing layer or a butyl rubber waterproofing layer or a polyurethane waterproofing layer or a waterproofing layer on the upper or lower surface or the upper or lower surface of a polymeric sheet or nonwoven fabric layer containing polyethylene, polypropylene or poly (ethylene terephthalate) (PET) Characterized in that a modified asphalt / urethane hybrid waterproof layer or a butyl rubber / urethane hybrid waterproof layer is coated.
14. A waterproof system structure made according to any one of claims 1 to 10 or 13.

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