KR100365258B1 - A water solvable exfditation paint - Google Patents

Abstract

The present invention relates to a water-soluble peeling paint, and more particularly, it is easy to remove due to the deterioration of adhesion, which is a characteristic of the modified acrylic resin emulsion, and an increase in the water resistance of the wax layer. Regardless of whether the coating is possible, the next process is possible immediately after drying, which not only improves work air and productivity, but also water solubility, which prevents worker safety, workplace safety, and environmental pollution. Even after being immersed in seawater or fresh water in a coated state, the protection and rust resistance of existing materials such as bottom antifouling paint is very excellent, and particularly relates to a water-soluble peeling paint to facilitate removal in water.

The water-soluble peeling paint of the present invention can protect the existing coating film from rust and marine life when it is used as a coating agent for temporarily protecting the existing coating film of the painted part or when the coated object is immersed in fresh water or sea water for a long time. 80.8 ~ 94.3wt% of acrylic resin emulsion which gives flexibility, dropping resistance, and water resistance of coating film, and for removing bubbles in coating film in peelable paint used for use as a coating agent or for temporary masking role. 3.0 to 0.5 wt% of silicone antifoaming agent, 1.0 to 0.1 wt% of acrylic leveling agent to improve the appearance of coating film, 15 to 5 wt% of water-soluble wax that decreases adhesion of marine organisms by lowering surface tension of coating film, and constant viscosity It is characterized by consisting of 0.2 to 0.1 wt% of a fluidity regulator (thickener) having a function that can be applied thickly without holding down.

Description

A water solvable exfditation paint}

The present invention relates to a water-soluble peeling paint, and more particularly, it is easy to remove due to the deterioration of adhesion, which is a characteristic of the modified acrylic resin emulsion, and an increase in the water resistance of the wax layer. Regardless of whether the coating is possible, the next process is possible immediately after drying, which not only improves work air and productivity, but also water solubility, which prevents worker safety, workplace safety, and environmental pollution. Even after being immersed in seawater or fresh water in a coated state, the protection and rust resistance of existing materials such as bottom antifouling paint is very excellent, and particularly relates to a water-soluble peeling paint to facilitate removal in water.

In general, the process of building a ship is outlined, first, to manufacture a block of the hull, weld the manufactured block in the dock (dock) to assemble the block, and then to the outside of the hull to prevent oxidation and corrosion And after painting the inside paint, basic internal equipment and the bottom antifouling paint to prevent marine life from attaching to the bottom part submerged in the seawater, it is separated from the dock and introduced into the sea water and fixed to the rock wall. In this state, substantial internal construction such as engine installation, electric device installation, and pipe installation will be performed.

In order to prevent marine organisms from adhering to the bottom of the ship during the shipbuilding process, the components of the bottom antifouling paints are very diverse, but the binders, antifouling agents, and antifouling agents generally give coating strength. It is composed of rosin to help the elution, the binder is mainly oil-based, rubber-based rubber, vinyl-based, antifouling agent is used, such as hydrooxide, fuolide.

When the bottom antifouling paint is applied to the bottom part, the internal works are carried out while the hull is introduced into the sea water and fixed to the rock wall.In this case, the internal construction takes 3 months to 1 year or longer, so the construction is completed. Before being taken over by the owner, marine life is already attached to the bottom of the ship. Of course, it is possible to prevent marine organisms from adhering to the bottom portion by the bottom antifouling paint, but there is a limit to the algae.

Therefore, in order to solve this problem, the bottom antifouling paint is applied to the bottom of the ship, the paint which can be removed on the bottom of the ship, and then peeled off, which can be removed from the water together with the marine life attached during the internal work of the ship for a long time. With the development of paint, the ship is delivered to the ship owner in a clean state with no marine life attached to the bottom antifouling paint. Such peelable paint is intended to temporarily protect the existing coating film on the painted part. When coating, when it is going to go to the next work after manufacturing for long and short period of time, the coating which protects existing coating film from rust and marine life when immersing the coated object in fresh water or sea water for a long time, should not be painted It can be used for temporary masking of a place.

This conventional peeling paint is a 50-60% non-volatile paint containing a large amount of oily solvent, high safety of the worker and the risk of fire on the work site, concern about environmental problems in the workplace, and coating film Since the thickness is too thin, it is difficult to remove after the work, and there is a limit that can be applied depending on the area to be coated or the type of the existing coating film, and it is very difficult to remove it in water when immersed in sea water or fresh water after coating. In fact, there are problems that cannot be used in various parts.

In order to solve the above problems, the present invention provides a defoaming agent (DEFOAMING AGENT) to remove bubbles in the coating film, a leveling agent (LEVELLING AGENT) to improve the appearance of the coating film, and decreases the adhesion of marine organisms by lowering the surface tension of the coating film surface. WAX ADDITIVE, ACRYLCRESIN EMULSION which gives flexibility, dropping and water resistance of coating film, and THICXOTHROPIC AGENT (thickener) with function that can be applied thickly without flowing down while maintaining a constant viscosity To prepare a water-soluble peeling paint through mixing and a number of processes at a predetermined ratio.

Therefore, the water-soluble peeling paint of the present invention is easy to remove due to the deterioration of adhesion, which is a characteristic of the modified acrylic resin emulsion, and the increase in the water resistance of the wax layer. The process enables not only to improve working air and productivity, but also to prevent worker safety, workplace safety, and environmental pollution due to its water solubility, and even after immersion in seawater or fresh water with peeling paint coated. It is a technical problem that the protection and rust prevention property of existing materials such as antifouling paints are very excellent, and in particular, to facilitate removal in water.

The water-soluble peeling paint of the present invention can protect the existing coating film from rust and marine life when it is used as a coating agent for temporarily protecting the existing coating film of the painted part or when the coated object is immersed in fresh water or sea water for a long time. 80.8 ~ 94.3wt% of acrylic resin emulsion which gives flexibility, dropping resistance, and water resistance of coating film, and for removing bubbles in coating film in peelable paint used for use as a coating agent or for temporary masking role. 3.0 to 0.5 wt% of silicone antifoaming agent, 1.0 to 0.1 wt% of acrylic leveling agent to improve the appearance of coating film, 15 to 5 wt% of water-soluble wax that decreases adhesion of marine organisms by lowering surface tension of coating film, and constant viscosity It is characterized by consisting of 0.2 to 0.1wt% of the fluidity regulator of the function that can be applied thickly without maintaining and flowing down.

Another feature of the present invention is a coating agent that can protect the existing coating film from rust and marine life when it is used as a coating agent for temporarily protecting the existing coating film of the painted part or when the coated object is immersed in fresh water or sea water for a long time. In the peelable paint used for the purpose of temporary masking or temporary masking, etc., 96 to 99.4 wt% of an acrylic resin emulsion which gives flexibility, dropping resistance and water resistance of the coating film and a silicone antifoaming agent for removing bubbles in the coating film It is what consists of 3.0-0.5 wt% and 1.0-0.1 wt% of acryl-type leveling agents which improve the external appearance of a coating film.

1 is a production of a water-soluble peeling paint showing an embodiment according to the present invention

Process diagram.

2 is a production of a water-soluble peeling paint showing another embodiment according to the present invention

Process diagram.

The present invention for achieving the above object is described with reference to FIG.

1 is a manufacturing process of the water-soluble peeling paint showing an embodiment according to the present invention, it is intended to be applied to the coating of the bottom antifouling paint or the coating of the submerged portion mainly coated on the bottom of the ship.

First, acrylic resin emulsion 80.8-94.3 wt% which gives the coating film flexibility, dropping resistance, and water resistance, 3.0-0.5 wt% silicone antifoaming agent for removing air bubbles in the coating film, and acrylic leveling agent 1.0- which improves the appearance of the coating film. 0.1 wt% was added to the mixing tank and stirred for about 30 minutes at a temperature of 5 to 50 ° C. and a humidity of 40 to 90%, and then 15 to 5 wt. Of water-soluble wax that reduced the adhesion of marine organisms by lowering the surface tension of the coating film surface. % And 0.2 ~ 0.1 wt% of a thixotropic fluidity modifier that can be applied thickly without maintaining a constant viscosity, are added to the mixing tank and stirred for about 30 minutes at a temperature of 5 to 50 ° C. and a humidity of 40 to 90%. Here, the acrylic resin emulsion which gives flexibility, dropping resistance, and water resistance of the coating film is 25 wt% of butyl acrylate monomer (Butyl Acrylate Monomer), 15 wt% of methyl methacrylate (Metyl Methacrylate), 7 wt% of acrylonitrile, 3 wt% of glycidyl methacrylate, and 50 wt% of water are used. A silicone antifoaming agent for removing air bubbles in the coating film is made of polysiloxane. The acrylic flattening agent which improves the appearance of the coating film is made of poly dimethyl siloxane. The fluidity regulator (thickener) having a function of applying a thick film without maintaining the constant viscosity may be used. Hydroxyl ethyl cellulose is used, and a water soluble wax that reduces the adhesion of marine organisms by lowering the surface tension of the coating film is made of a polyethylene wax emulsion.

The water-soluble peeling paint of the present invention comprising the above components and processes, first paint and dry the bottom antifouling paint to prevent the adhesion of marine life to the bottom part of the ship's hull, then an acrylic resin emulsion on the surface of the bottom antifouling paint, The water-soluble peeling paint of the present invention consisting of a silicone antifoaming agent, an acrylic leveling agent, a water soluble wax, and a fluidity regulator is applied and dried to a predetermined thickness.

At this time, the release paint is coated on the bottom antifouling paint is deposited because of butyl acrylate monomer 25wt%, methyl methacrylate 15wt%, acrylonitrile 7wt%, glycidyl methacrylate 3wt%, water 50wt% The emulsifier enters the oil-based resin of the mixed acrylic resin emulsion to widen the molecular spacing of oil-based resins, and water enters between them to dissolve the resin in water, and when it is solidified (cured) in that state, Since the water is evaporated and only the oil resin component of the acrylic resin emulsion remains, the intermolecular bonding force of these resin components forms a coating film.

Therefore, the peeled paint of the non-dried liquid state of the present invention becomes water soluble in water to prevent the safety of the worker, the safety of the workplace, environmental pollution, the peeled paint after curing is not dissolved in water.

Therefore, water-based peeling paint is coated on the surface of the bottom antifouling paint and soaked in seawater in the dried state to carry out the internal construction for a long and short period of time, and after completion of the internal construction of the vessel for a long and short period of time, By removing the water-soluble peeling paint coated on the part will lead to the marine life is not attached to the bottom antifouling paint at all.

The reason why the water-soluble peeling paint is easily peeled off in water is that the functional groups that adhere well to the molecular structure of the acrylic resin itself are reduced, and the peeling of the coating film is easily performed by increasing functional groups that increase flexibility and water resistance. will be.

Here, the compounding amount of the acrylic resin emulsion formed by mixing 25% by weight of butyl acrylate monomer, 15% by weight of methyl methacrylate, 7% by weight of acrylonitrile, 3% by weight of glycidyl methacrylate, and 50% by weight of water is 80.8 to 93.4% by weight. If it is out of the range, the flexibility and peelability of the coating film is lowered, and if the polysiloxane, a silicone antifoaming agent, is out of the range of 3.0 to 0.5 wt%, bubbles remain, causing problems in water resistance and flexibility. If the siloxane exceeds the range of 1.0 to 0.1 wt%, the appearance of the coating becomes irregular, reducing the aesthetic appearance. If the water-soluble polystyrene wax emulsion is outside the range of 15 to 5 wt%, the flexibility of the coating and the adhesion of marine organisms Increasing problems occurred, the results of the experiment showed that the above range is most appropriate.

Therefore, since the release paint of the present invention is water-soluble, it does not cause worker safety, workplace safety, or environmental pollution. Furthermore, even after immersing the coated film in seawater or fresh water, the existing base is excellent in protection and anti-rusting properties and then peeled off. Even when the paint is removed, it can be easily removed, and in particular, the film can be easily removed in water.

Experimental Example

Prepare six stainless steel specimens of width × length 200 × 300 mm, with two specimens unpainted at all (Sample 1), and the other two specimens with ship's bottom antifouling paint (Sample 2) The remaining two specimens are prepared in the state in which a general epoxy resin is coated (sample 3).

Then, peel-type paint was firstly coated with a thickness of 300 to 400 μm on each specimen and cured at 25 ° C. for 16 hours, and after 6 to 18 hours, secondary coating and curing was performed with a thickness of 300 to 400 μm. One specimen was immersed in seawater and fresh water, and three weeks later, the specimens were taken out and compared for appearance and removal performance. The results are shown in the table below.

Table 1

Psalter One 2 3 sea water clear water sea water clear water sea water clear water Exterior Great Great Great Great Great Great Ease of Removal Great Great Great Great Great Great

Figure 2 is a manufacturing process of the water-soluble peeling paint showing another embodiment according to the present invention, that is, general purpose, that is, when the coating agent to temporarily protect the existing coating of the painted part, when the next operation after the preparation for a long and short period It is intended to be used as a temporary masking role in places that should not be painted.

96 ~ 99.4wt% of acrylic resin emulsion which gives flexibility, dropping resistance and water resistance of coating film, 3.0 ~ 0.5wt% of silicone antifoaming agent to remove bubbles in coating film, and 1.0 ~ 0.1wt of acrylic leveling agent to improve appearance of coating film % Is added to the mixing tank and stirred for about 30 minutes at a temperature of 5 to 50 ° C. and a humidity of 40 to 90%. Here, the acrylic resin emulsion which gives the coating film flexibility, dropping resistance, and water resistance is butyl acrylate monomer. 25 wt%, 15 wt% methyl methacrylate, 7 wt% acrylonitrile, 3 wt% glycidyl methacrylate, and 50 wt% water. A silicone-based antifoaming agent for removing air bubbles in the coating film The polysiloxane is used, and the acrylic leveling agent for improving the appearance of the coating film is polydimethyl siloxane.

Thus, the water-soluble peeling paint prepared as another embodiment of the present invention is used as a coating for protecting bridges, offshore structures, nuclear power plants, large structures of various plants, ships or other iron structures placed in severe corrosive environments from corrosion. In particular, it is used as a coating agent to temporarily protect the existing coating film of the painted part, and as a temporary masking role of a place not to be painted when manufacturing the next work after manufacturing for a long and short period of time. will be.

As described above, the water-soluble peeling paint of the present invention is an acrylic resin emulsion which gives the coating film flexibility, dropping resistance, and water resistance, a silicone antifoaming agent that removes air bubbles in the coating film, an acrylic leveling agent that improves the appearance of the coating film, and the surface tension of the coating film surface. By modifying a water-soluble wax additive that lowers the adhesion of marine organisms by a decrease and a fluid additive that functions to maintain a constant viscosity and thickly without flowing down at a predetermined ratio, the peelable paint is produced through various processes. It is easy to remove due to the deterioration of adhesive force, which is the characteristic of the acrylic resin emulsion, and the increase in the water resistance of the wax layer.The coating process is possible regardless of the existing coating state, so the next process is possible immediately after drying, thereby improving work air and productivity. As well as being water soluble, worker safety, workplace safety, environment In addition to preventing contamination, even after being immersed in seawater or fresh water in the state of coating with peelable paint, the protection and rust resistance of existing materials such as bottom antifouling paints are very excellent. will be.

Claims (2)

(Correction) When used as a coating to temporarily protect the existing coating on the painted area, or when the coated object is immersed in fresh water or sea water for a long time, the existing coating can be used as a coating to protect it from rust and marine life. In the case of peeling paint used for the purpose of temporary masking or the like, 80.8 ~ 94.3wt% of acrylic resin emulsion which gives flexibility, dropping resistance and water resistance of the coating film, 3.0 to 0.5 wt% of a silicone-based antifoaming agent for removing bubbles in the coating film, 1.0 to 0.1 wt% of an acrylic leveling agent to improve the appearance of the coating film, 15 to 5 wt% of water-soluble wax that lowers the surface tension of the coating film and reduces the adhesion of marine organisms, A water-soluble peeling paint, characterized by mixing 0.2 to 0.1 wt% of a fluidity modifier having a constant viscosity to be applied thickly without flowing down. (Tablet) When used as a coating to temporarily protect the existing coating on the painted area, or as a coating that can protect the existing coating from rust and marine life when the coated object is immersed in fresh water or sea water for a long time. In the case of use, or in a peelable paint used for a temporary masking role or the like, 96 ~ 99.4wt% of acrylic resin emulsion which gives flexibility, dropping resistance and water resistance of the coating film, 3.0 to 0.5 wt% of a silicone-based antifoaming agent for removing bubbles in the coating film, A water-soluble peeling paint, comprising 1.0 to 0.1 wt% of an acrylic leveling agent for improving the appearance of a coating film.