WO2007043208A1

WO2007043208A1 - Heat insulating coating material

Info

Publication number: WO2007043208A1
Application number: PCT/JP2006/309375
Authority: WO
Inventors: Miyuki Narita; Yoshiaki Akanuma; Takeshi Oshino
Original assignee: Oshino Lamps Limited
Priority date: 2005-10-14
Filing date: 2006-05-10
Publication date: 2007-04-19
Also published as: JP2007106918A

Abstract

A heat insulating coating material comprising a solution or dispersion containing a silane coupling agent. Further, there is provided a method of heat insulation characterized in that an inorganic material, metallic material or resin material on the surface thereof is coated with a solution or dispersion containing a silane coupling agent. The provided heat insulating coating material is available at low cost and excels in applicability.

Description

Specification

Thermal insulation coating material

Technical field

TECHNICAL FIELD [0001] The present invention relates to a heat insulating coating material capable of obtaining a heat insulating effect by being applied to a window glass or the like of a building.

Background art

[0002] In general, in an enclosed space, for example, a building or a container, an inorganic or organic heat insulating material or the like is used to block heat transfer from the outside or from the outside to the inside.

Examples of inorganic heat insulating materials include glass heat insulating materials such as glass fiber and foam glass, mineral heat insulating materials such as asbestos, slag cotton, perlite and vermiculite, porous silica, porous alumina, alumina, magnesia, zirconia and There are ceramic insulation materials such as refractory bricks, and carbon insulation materials such as black lead and carbon fiber.

On the other hand, as organic heat insulating materials, there are foamed plastic heat insulating materials such as expanded polyethylene, expanded polystyrene and expanded polyurethane, and natural heat insulating materials such as wood board, cork and plant fiber. Furthermore, by utilizing the low thermal conductivity of the gas, the gas such as air is made of aluminum.

Also known are air-layer insulation materials sealed in paper and plastic.

[0003] As described above, the conventional heat insulating material has a mechanism in which the thermal conductivity decreases and the heat insulating efficiency increases by increasing the number of pores or voids to reduce the density.

[0004] Since this reduction in density causes an increase in thermal conductivity due to a decrease in mechanical strength and gas convection caused by an increase in temperature, there is a limit to the increase in thermal insulation efficiency in this method.

In addition, the increase in the heat insulation effect due to the increase in the thickness of the heat insulating material causes a high cost associated with an increase in the amount of heat insulating material used and a practical disadvantage associated with an increase in the capacity of the heat insulating material.

[0005] On the other hand, a force that has recently been used for a type of heat insulating material applied to the outer wall. This is a ceramic-coated material that is extremely expensive and has not been widely used.

Disclosure of the invention Problems to be solved by the invention

[0006] Accordingly, an object of the present invention is to provide a heat insulating coating material that is inexpensive and has good usability.

Means for solving the problem

[0007] The present inventor has formed various coating films and studied the heat insulating effect. As a result, when a silane coupling agent is applied to the surface of glass or the like, an excellent heat insulating coating film is formed. Has been found to be good and does not adversely affect substrates such as glass, and the present invention has been completed.

That is, the present invention provides a thermal barrier coating material comprising a solution or dispersion containing a silane coupling agent.

The present invention also provides a heat insulation method characterized by applying a solution or dispersion containing a silane coupling agent to the surface of an inorganic material, a metal material or a resin material.

The invention's effect

[0009] With the use of the heat insulating coating material of the present invention, for example, it can be applied only to the glass surface of a building room, for example, to suppress heat radiation to the outside in the winter, and to radiate strong outdoor force in the summer. By suppressing it, the room can be insulated.

Brief Description of Drawings

[0010] FIG. 1 is a diagram showing the indoor temperature and the outdoor temperature (black square) when a heat-insulating coating film of the present invention is processed on a window glass in summer (black circle) and when not processed (black triangle). .

[Fig. 2] A diagram showing the indoor temperature and the outdoor temperature (black square) when the heat-insulating coating film of the present invention is applied to a window glass in winter (black circle) and when it is not processed (black triangle).

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] The heat insulating coating material of the present invention also has an aqueous solution or water dispersion strength containing a silane coupling agent. The silane coupling agent may be a silane compound having at least one silanol group-forming alkoxy group and an organic functional group. For example, the following general formula (1) [0012] [Chemical 1]

R ¹

R ² — Si— X (1)

R ³

[0013] (where

At least one of R ² and R ³ represents an alkoxy group or a hydroxyl group, the remainder represents an alkoxy group, a hydroxyl group or an alkyl group, and X represents an organic functional group)

The compound represented by these is mentioned.

[0014] The alkoxy group represented by R \ R ² and R ^3, the alkoxy group having 1 to 6 carbon atoms, for example if a methoxy group, an ethoxy group, and the like. These alkoxy groups react with moisture on the surface of a substrate for forming a coating film, for example, an inorganic material such as glass or metal, an organic material or a metal material, and are hydrolyzed to form silanol. Hydrogen bonds with the hydroxyl groups present on the surface of the material. Alternatively, a dehydration condensation takes place between silanols on the silicon produced by hydrolysis of alkoxy groups and hydroxyl groups present on the surface of the inorganic material or metal material to form a covalent bond, thereby forming an inorganic material. Adsorption of silane coupling agents on metal and metal materials occurs. Furthermore, a dehydration condensation reaction also occurs between silanols of the silane coupling agent on the inorganic material or metal material, and a transparent and strong film of the silane coupling agent can be formed on the inorganic material or metal material.

[0015] Note that the formula (1)

A part of the alkoxy groups of R ² and R ³ may be a hydroxyl group. Examples of the alkyl group represented by R ² and R ³ include an alkyl group having 1 to 6 carbon atoms, such as a methyl group and an ethyl group. It is particularly preferable that at least one of R ¹ R ² and R ³ is an alkoxy group or a hydroxyl group and two or more is an alkoxy group.

[0016] The organic functional group represented by X includes a bur group, an epoxy group, a styryl group, a methacryloxy group, an attaryloxy group, an amino group, a ureido group, a chloropropyl group, a mercapto group, a sulfide group, and an isocyanate group. And alkyl groups containing these groups. Such X causes a hydrogen bond, a dehydration condensation reaction, or a polymerization reaction between organic functional groups of the silane coupling agent bonded on the inorganic material, metal material, or organic material to form a strong coating film. In addition, X is strongly bonded by chemical bonding or cross-linking with organic materials such as resin. As a result, a transparent and strong film of the silane coupling agent can be formed on the organic material.

[0017] Examples of silane coupling agents include butyltrichlorosilane, butyltrimethoxysilane, vinyltriethoxysilane, 2- (3,4 epoxy cyclohexyl) ethyltrimethoxysiloxysilane, and 3-glycidoxypropyl. Triethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyljetoxysilane, 3-methacryloxypropyltriethoxysilane, 3- Atalyloxypropyltrimethoxysilane, N—2 (aminoethyl) —3 Aminopropylmethyldimethoxysilane, N—2 (aminoethyl) 3 aminopropyltrimethoxysilane, N—2 (aminoethyl) 3 aminopropyltriethoxysilane , 3-Aminopropyltrimethoxysilane, 3-Aminopropyltriethoxysilane, 3-Triethoxysilyl-N— (1,3 dimethylpropylidene) propylamine, N-Ferru 3 Amaminopropyltrimethoxysilane, N— (Vinylbenzyl) 2 Aminoethyl 1 3 Aminopropyltrimethoxysilane, 3-Ureidopropyltriethoxysilane, 3-Clopropropyltrimethoxysilane, 3-Mercaptopropylmethyldimethoxysilane, 3-Mercaptopropyl trimethoxysilane, Bis ( And triethoxysilylpropyl) tetrasulfide and 3-isocyanate propyltriethoxysilane. As these silane coupling agents, those commercially available from Shin-Etsu Chemical Co., Ltd., Toray Industries Co., Ltd., and the like can be used.

[0018] These silane coupling agents are used as solutions or dispersions. The solvent for the silane coupling agent is preferably stored in a non-aqueous solvent such as methanol, ethanol, propanol or acetone before application. Just before application, water may be added to this and used. Solution or the concentration of the silane coupling agent in the dispersion is 0. 0 05-50 wt ^_0/0, further from 0.01 to 40 weight ^_0/0, especially 01 to 30 weight ^_0/0 Power preferably 0.! /.

[0019] The solution or dispersion containing the silane coupling agent may further contain a colorant such as a pigment or a dye. When these colorants are not blended, the resulting heat-insulating coating film is transparent and does not affect the color of the substrate.

[0020] The subject of application of the heat insulating coating material of the present invention is organic materials, inorganic materials, and metal materials! Also good. Examples of inorganic materials include glass, ceramic, marble, and concrete. Examples of the metal material include aluminum, tin, zinc, molybdenum, tungsten, titanium, gold, silver, copper, nickel, iron, and alloys thereof. Organic materials (grease materials) include polypropylene, polyethylene, polymethyl methacrylate, polybutylene terephthalate, polyacetal, ABS resin, polycarbonate, modified polyphenylene ether, polyacrylate, polyethersulfone, polysulfone, Polyphenylene sulfide, polyamide, polyimide, polyamideimide, polyetherimide, polyetheretherketone, and reinforced polyethylene terephthalate.

[0021] The heat insulating coating material of the present invention can be used for forming a low thermal conductive transparent layer by coating on the surface of an inorganic material, a metal material and a resin material used as a base material. That is, the coating film of the heat insulating coating material of the present invention formed on an inorganic material, a metal material, or an organic material suppresses heat radiation from the inorganic material, the metal material, or the organic material to a low temperature zone, and a silane coupling agent. The temperature difference in the opposite direction between the layer and the inorganic material, metal material, or organic material increases, and heat conduction by convection, conduction and radiation from the high temperature zone to the low temperature zone can be reduced.

[0022] From this, when the coating film of the heat insulating coating material of the present invention is laminated on the high temperature zone side, the heat conduction by the convection, conduction and radiation from the high temperature zone to the low temperature zone is reduced, It suppresses the temperature drop on the side and brings about a heat insulation effect. In other words, in the winter, when the coating film of the heat insulating coating material of the present invention is laminated on the indoor side of the window glass that becomes the high temperature zone, the heat conduction due to convection, conduction, and radiation from the room to the outside that becomes the low temperature zone decreases. By doing so, the temperature drop in the room is suppressed and a heat insulating effect is brought about.

[0023] On the other hand, when a coating film made of the heat insulating coating material of the present invention is laminated on the low temperature zone side, the temperature rise on the low temperature zone side is reduced by reducing the heat conduction by radiation from the high temperature zone to the low temperature zone. Suppresses the heat insulation effect. That is, in the summer, when a coating film made of the heat-insulating coating material of the present invention is laminated on the indoor side of the window glass in the low temperature zone, the heat conduction due to radiation into the outdoor force chamber in the high temperature zone is reduced. It suppresses the temperature rise in the room and brings about an insulation effect.

[0024] In general, as a condition for occurrence of condensation, indoors at a temperature of 20 ° C and a humidity of 50% Since the dew point temperature of water vapor is 9.6 ° C, condensation occurs when the surface temperature on the indoor side of the window falls below 9.6 ° C. However, due to the heat insulating effect of the coating film according to the present invention, a decrease in the surface temperature of the indoor window glass is suppressed, so that dew condensation occurring on the window glass surface can be suppressed.

[0025] Since the heat insulating coating process using the heat insulating coating material of the present invention can be easily performed, the existing window glass can be easily heat-insulated. Furthermore, since the heat insulating coating processing using the heat insulating coating material of the present invention can be performed without changing the structure of the window glass, it is also applied to the window glass of a vehicle such as an automobile that is connected only with the window glass of the building. be able to. Example

[0026] Hereinafter, specific examples will be described.

[0027] Example 1

In summer, a volume of 42m ³ room window glass (1.2m X O. 9m) inside the room, a solution obtained by diluting 0.5 g of KBM6123, made by Shin-Etsu Chemical Co., Ltd. with 99.5 g of water, per lm ² The heat insulating coating was processed by repeating the application of 6mg twice, and the glass surface of the same room was not processed, and the glass surface was attached to the outside. In these rooms, the air conditioner was put into operation at 18 ° C at the start of measurement, and the changes over time in the room were measured. The results are shown in Fig. 1.

[0028] Fig. 1 shows the changes over time in the indoor temperature when an indoor window glass was processed on an indoor window glass in summer, the indoor temperature in the case of non-calorie, and the outdoor temperature. The initial values of the room temperature for thermal insulation coating and non-calorie were 28.2 and 28.9 ° C, but when the air conditioner was operated at 18 ° C at the start of measurement, 1 hour Later room temperatures were 26.8 and 27.9 ° C, respectively, and after 8 hours they were 20.8 and 24.2 ° C. The difference between the heat-insulated coating process and the weakness was 1.1 and 3.4 ° C after 1 and 8 hours, respectively. The rate of decrease in temperature when the insulation film was processed and unprocessed 8 hours after the initial temperature was 26 and 16%, respectively.The insulation effect of the insulation film processing was 1. A 6-fold effect was observed.

[0029] Further, when considering the electric power, when the heat insulating coating is processed with respect to the room temperature after 8 hours, the heat insulating effect similar to that in the case of incompetent with 62% electric power is shown. From this 3 It was estimated that 8% power could be reduced.

[0030] Example 2

Window glass of the room volume of 42m ³ in the winter (1. 2m X O. 9m) Shin-Etsu I匕学Industry Co., Ltd. to the indoor side of the KBM6123, the liquid that the 0. 5g was diluted with water 999. 5g, per lm ² The heat insulating coating was processed by repeating the application of 6mg twice, and the glass surface of the same room was not processed, and the glass surface was attached to the outside. In these rooms, the room temperature was raised to 20 ° C with a hot air heater of 2300kcalZh in the night, and then the hot air heater was stopped and the change in room temperature over time was measured. The result is shown in Fig.2.

[0031] Fig. 2 shows changes over time in the indoor temperature when a thermal insulating coating is applied to the indoor window glass in winter, the indoor temperature in the case of non-calorie, and the outdoor temperature. The initial values of the indoor temperature in the case of thermal insulation coating and non-calorie were 20.2 and 20.3 ° C, respectively, but after 1 hour, 16.1 and 12.8 ° C, respectively. It was 8.4 and 5.8 ° C after 6 hours. The difference between heat-insulated coating and unprocessed film was 3.3 and 2.6 ° C after 1 and 6 hours, respectively. The rate of decrease in temperature after 6 hours of heat treatment after the initial temperature is 58 and 71%, respectively, and the heat insulation effect of heat treatment is 1 compared to the case without heat treatment. A double effect was observed.

[0032] Further, when considering the electric power, when the heat insulating coating is processed with respect to the room temperature after 6 hours, the heat insulating effect similar to that in the case of incompetent with 82% electric energy is shown. From this, it was estimated that 18% of power could be reduced.

[0033] Example 3

Manufactured by Shin-Etsu Chemical Co., Ltd. on the freezing side of the freezer with one side of 0.35 m in length, 0.55 m in width and 0.60 m in depth in a constant temperature and humidity chamber set at 24 ° C and humidity of 45% KBM6123,0. the solution was diluted with water 999. 5 g of 5g, mounted so as insulation coating process and raw glass surface due to repeated twice to per lm ² 6 mg coating is on the outside, the temperature in the freezer Was kept at -10 ° C, and the state of condensation on the surface was observed. The results are shown in Table 1.

[0034] [Table 1] Hour / minute

0 30 60 90 120 Insulated coated glass None None None None None Unprocessed glass None With droplets With droplets With droplets With droplets

[0035] Condensation occurred on the glass surface of the unsatisfactory glass after 30 minutes, whereas no condensation droplets were observed on the heat-treated glass surface. From this, it was confirmed that the heat insulating coating processing with the active silicon derivative of the present invention had a dew condensation suppressing effect due to the heat insulating effect on the glass surface.

[0036] From these results, it was confirmed that the heat insulating coating processing using the heat insulating coating material of the present invention is effective as a heat insulating material and has a heat insulating function without changing the structure of the window glass.

Claims

The scope of the claims

[1] A heat insulating coating material comprising a solution or dispersion containing a silane coupling agent.

[2] The heat insulating coating material according to [1], wherein the concentration of the silane coupling agent in the solution or dispersion is 0.005 to 50% by mass.

[3] The silane coupling agent is represented by the following general formula (1)

[Chemical 1]

R ¹

R ² — Si— X (1)

R ³

(Where

The heat insulating coating material according to claim 1 or 2, which is a compound represented by the formula:

[4] The heat insulating coating material according to any one of claims 1 to 3, which is used for glass surface coating.

[5] The thermal insulation coating material according to any one of claims 1 to 4, wherein the thermal insulation coating material is used for coating a window glass surface on the indoor side of a building.

[6] A heat insulation method comprising applying a solution or dispersion containing a silane coupling agent to the surface of an inorganic material, a metal material, or a resin material.

7. The heat insulation method according to claim 6, wherein the concentration of the silane coupling agent in the solution or dispersion is 0.005 to 50% by mass.

[8] The silane coupling agent is represented by the following general formula (1)

[Chemical 2]

R ¹

R ² — Si— X (1)

R ³

(Wherein at least one of RR ² and R ³ represents an alkoxy group or a hydroxyl group, the remainder represents an alkoxy group, a hydroxyl group or an alkyl group, and X represents an organic functional group) The heat insulation method of Claim 6 or 7 which is a compound represented by these.

The heat insulation method according to any one of claims 6 to 8, wherein the surface is a glass surface.

The heat insulation method according to any one of claims 6 to 9, wherein the surface is a window glass surface on the indoor side of the building.