JP2009062707A - Coated panel and joiner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coated panel capable of forming a joiner having no adhesiveness to a sealing material with saved power and at low cost. <P>SOLUTION: A film 1 having non-adhesiveness to the sealing material charged in a joint part is formed on the surface of a base 2. The adhesion to the sealing material can be prevented by the film 1. The adhesion of the sealing material and the joiner B is prevented from occurring by forming the joiner by the coated plate A. Since undue force does not act on the sealing material the sealing material since the sealing material can follow up the extension/retraction of a construction plate and, therefore, the sealing material is not cut off nor produces peeling from the building plate. Therefore, the waterproofness of the joint part can be secured. Consequently, the joiner having no-adhesiveness to the sealing material can be manufactured without stamping a member such as a tape and with saved labor and at low cost. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coated plate that does not adhere to a sealing material and a joiner using the same.

  Conventionally, when forming a wall such as an outer wall of a building, a plurality of building boards (plate-like wall materials) are arranged side by side in the horizontal direction (horizontal direction) as outer wall materials. In this case, a joiner is placed between the adjacent wall materials, and a sealing material (also called caulking material) is filled between the side end surfaces of the adjacent building boards on the surface of the joiner (outdoor side surface). I am trying to ensure the waterproofness of the joints. In the structure shown in FIG. 4, a joiner B having a long cross section in the vertical direction is used. This joiner comprises a receiving portion 7 having a U-shaped cross section and a fixing piece 12 projecting outward from both ends of the receiving portion 7, and the fixing piece 12 is placed on the outdoor side surface of a wall base such as a column or a stud. It is fixed and attached. Then, the side end surface of the building board 4 is brought into contact with the side surface of the receiving part 7, and the building boards 4 and 4 are attached to the wall base with the receiving part 7 interposed between the adjacent building boards 4 and 4. A joint portion 5 which is long in the vertical direction is formed between the side end surfaces of the building boards 4 and 4 adjacent to the surface of the receiving portion 7, and the sealing material 6 is pushed into the joint portion 5 from the outdoor side to be watertight. Fill. As the sealing material, an elastic or flexible synthetic resin such as a urethane resin, a silicone resin, or a polysulfide resin is used.

  As described above, the sealing material 6 filled in the joint portion 5 is preferably bonded only to the side end surfaces of the building boards 4 and 4 arranged on the left and right sides, and the other surfaces are not bonded. . For example, when the sealing material 6 is bonded to the surface of the receiving portion 7 of the joiner B, the sealing material 6 is fixed at three points, that is, the side end surface of the building board 4 and the surface of the receiving portion 7 and expands and contracts. Therefore, the sealing material 6 cannot follow the expansion and contraction (expansion and contraction, etc.) of the building board 4, and an excessive force is applied to the sealing material 6 to cause a breakage. There was a problem that the waterproofness of the joint portion 5 was lowered due to peeling.

Then, although the tape which reduces the adhesive performance with respect to a sealing material is affixed on the surface of the receiving part of a joiner (for example, refer patent document 1), it says that it takes an effort and cost to stick a tape in this case There was a problem.
JP 2002-088935 A

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a paint plate that can save and cost-effectively joiner that does not adhere to a sealing material, and a joiner using the same. is there.

  The coated plate A according to claim 1 of the present invention is characterized in that a coating material 1 having no adhesiveness and a sealing material filled in the joint portion is provided on the surface of the substrate 2.

  A coated plate A according to a second aspect of the present invention is the coated plate A according to the first aspect, wherein the coating film 1 comprises a fluororesin (a) having a radically polymerizable unsaturated bond via a urethane bond and a one-end radically polymerizable polysiloxane ( It is characterized by containing a fluorine-based resin copolymerized with b).

  The coated plate A according to a third aspect of the present invention is characterized in that, in the first or second aspect, the primer layer 3 is provided between the coating film 1 and the surface of the substrate 2.

  The coated plate A according to claim 4 of the present invention is characterized in that in any one of claims 1 to 3, at least one of the coating film 1 and the primer layer 3 contains an aggregate.

  The joiner B according to claim 5 of the present invention is a joiner B for holding the sealing material 6 filled in the joint portions 5 of the adjacent building boards 4 and 4, and is according to any one of claims 1 to 4. The coating plate A is used to form a receiving portion 7 that comes into contact with the sealing material 6, and the coating portion 1 is provided on the receiving portion 7.

  A joiner B according to a sixth aspect of the present invention is characterized in that, in the fifth aspect, the paint plate A according to any one of the first to fourth aspects is formed into a hat shape by bending. To do.

  In the invention of claim 1, adhesion with the sealing material 6 can be prevented by the coating film 1, and the adhesion between the sealing material 6 and the joiner B is prevented by forming the joiner B with the coating plate A. Can do. Accordingly, the sealing material 6 can follow the expansion and contraction of the building board 4 and an excessive force is not applied to the sealing material 6, and the sealing material 6 may be cut or peeled off from the building board 4. The waterproofness of the joint portion 5 can be ensured without being lost. Further, when the joiner B that does not have adhesiveness with the sealing material 6 is manufactured, it is not necessary to attach a member such as a tape, and it can be formed with reduced labor and cost.

  In invention of Claim 2, the non-adhesiveness with the sealing material 6 can be ensured because the coating film 1 contains predetermined | prescribed fluorine resin.

  In the invention of claim 3, the adhesion between the coating film 1 and the substrate 2 can be enhanced by the primer layer 3, and the coating film 1 can be peeled off even when the joiner B is formed from the coated plate A. And can be prevented from falling off.

  In the invention of claim 4, the surface of the coating film 1 can be made uneven by the aggregate, and the non-adhesiveness with the sealing material 6 can be further improved.

  In the invention of claim 5, the adhesion between the receiving portion 7 and the sealing material 6 can be prevented, and the sealing material 6 can follow the expansion and contraction of the building board 4, so that an excessive force is applied to the sealing material 6. In addition, the sealing material 6 is not cut off or peeled off from the building board 4, so that the waterproofness of the joint 5 can be secured. Further, when the joiner B having non-adhesiveness with the sealing material 6 is produced, it is not necessary to attach a member such as a tape, and it can be formed with reduced labor and cost.

  In the invention of claim 6, it is not necessary to affix a member such as a tape when producing the joiner B having non-adhesiveness with the sealing material 6, and it can be formed with reduced labor and cost.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As shown in FIG. 1, the coated plate A of the present invention is formed by providing a non-adhesive coating film 1 having no adhesiveness to a sealing material on the surface of a base material 2.

  As the substrate 2, a metal plate such as a stainless steel plate or a galvanized steel plate can be used, but it may be formed of a resin material. It is preferable to provide a primer layer 3 on the surface of the substrate 2. The primer layer 3 only needs to have high adhesion between the substrate 2 and the coating film 1. For example, the primer layer 3 can be formed of a coating film such as a polyester resin paint or an epoxy resin paint. However, it is preferable to form the primer layer 3 using a polyester resin paint rather than a general epoxy resin paint so that the adhesion to the coating film 1 is higher, and in particular, a polyester resin having a molecular weight of 3000 or more. Is preferred. The primer layer 3 can be formed to 4 to 10 μm, for example, as long as it can prevent the coating film 1 from being peeled off.

  The coating film 1 does not have adhesiveness with the sealing material. Here, “not having adhesiveness” means not only the case where the sealing material and the coating film 1 do not adhere at all, but also the adhesiveness to the extent that the sealing material and the coating film 1 are peeled off by the expansion and contraction of the building board described later ( Including cases with releasability. Such a coating film 1 can be formed of a paint containing a fluororesin obtained by copolymerizing a fluororesin having a radically polymerizable unsaturated bond and a one-end radically polymerizable polysiloxane via a urethane bond. As such a coating material, the coating material currently disclosed by Unexamined-Japanese-Patent No. 2003-292870 or Unexamined-Japanese-Patent No. 2005-262134 can be used, for example. That is, this coating material comprises a binder as an essential component, and further comprises various solvents, additives, extender pigments and the like as required.

  The binder is a fluororesin (basic) obtained by copolymerizing the fluororesin (a) having a radically polymerizable unsaturated bond via the urethane bond as described above and the one-end radically polymerizable polysiloxane (b). Resin) is an essential component, and if necessary, a curing agent for the fluororesin is blended. As the binder, in addition to the above fluorine-based resins, other fluorine-based materials, acrylic silicon-based materials, urethane silicon-based materials, fluorine-silicon-based materials, inorganic-based resins, etc. may be combined. A combination of an acrylic or urethane resin, or a combination of these with a curing agent, can be preferably mentioned as a representative one.

  The fluororesin (a) having a radically polymerizable unsaturated bond via a urethane bond includes, for example, a fluororesin (a-1) having a hydroxyl group and a radically polymerizable monomer (a-2) having an isocyanate group. It is obtained by reacting

  The hydroxyl value of the fluororesin (a-1) having a hydroxyl group is preferably 5 to 250 mgKOH / g, more preferably 10 to 200 mgKOH / g, and still more preferably 20 to 150 mgKOH / g. When the hydroxyl value is less than 5 mgKOH / g, the amount of the radically polymerizable monomer (a-2) having an isocyanate group is remarkably reduced, so that grafting does not proceed sufficiently and the reaction mixture tends to become cloudy. It is in. Moreover, since the hydroxyl value of a fluorine-type resin becomes small as a result, it exists in the tendency for the non-adhesiveness of the coating film 1 to fall. On the other hand, when the hydroxyl value exceeds 250 mgKOH / g, the compatibility with the one-end radical polymerizable polysiloxane (b) deteriorates, phase separation occurs, and the graft copolymerization itself tends not to proceed.

  Although the fluororesin (a-1) which has a hydroxyl group can be prepared by a well-known method, a commercial item can also be used. Commercially available products include, for example, Lumiflon (registered trademark) LF-100, LF-200, LF-300, LF-400, LF-554, LF-600, LF-986N (manufactured by Asahi Glass Co., Ltd.), Ceraful Coat (registered) Trademarks) PX-40, A606X, A202B, CF-803 (manufactured by Central Glass), ZAFLON (registered trademark) FC-110, FC-220, FC-250, FC-275, FC-310, FC-575, XFC -973 (manufactured by Toagosei), Zeffle (registered trademark) GK-510 (manufactured by Daikin Industries), Fluorate (registered trademark) K-700, K-702, K-703, K-704, K-705 (Dainippon Ink Chemical Industries, Ltd.) and the like can be used, and these can be used alone or in combination.

  As the radical polymerizable monomer (a-2) having an isocyanate group, for example, methacryloyl isocyanate, 2-isocyanatoethyl methacrylate, m- or p-isopropenyl-α, α-dimethylbenzyl isocyanate and the like are used alone. , Or a combination thereof.

  The radically polymerizable monomer (a-2) having an isocyanate group is reacted with the fluororesin (a-1) having a hydroxyl group at, for example, 0.001 to 0.1 mol per equivalent of the hydroxyl group. Is preferred. If it is less than 0.001 mol, graft copolymerization becomes difficult and the reaction mixture tends to become cloudy. On the other hand, if it exceeds 0.1 mol, gelation tends to occur during graft polymerization.

  One terminal radically polymerizable polysiloxane (b) is, for example, represented by the general formula (i),

[R ¹ in the formula is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a phenyl group, a cyclohexyl group, etc. Are preferably mentioned, and preferably a hydrogen atom or a methyl group. R ² , R ³ , R ⁴ , R ⁵ and R ⁶ in the formula may be the same or different from each other, and are a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, for example, a methyl group , Ethyl group, propyl group, butyl group, pentyl group, hexyl group, phenyl group, cyclohexyl group, preferably R ² , R ³ , R ⁴ and R ⁵ are methyl group, phenyl group, R ⁶ are , Methyl group, butyl group and phenyl group. In the formula, n is an integer of 2 or more, preferably an integer of 10 or more, more preferably an integer of 30 or more. Or general formula (ii),

[In the formula, R ⁷ is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a phenyl group, and a cyclohexyl group. Preferably, they are a hydrogen atom and a methyl group. R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ and R ¹² may be the same or different from each other, and are a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, such as a methyl group, an ethyl group, a propyl Group, butyl group, pentyl group, hexyl group, phenyl group, and cyclohexyl group. Preferably, R ⁸ , R ⁹ , R ¹⁰ and R ¹¹ are a methyl group and a phenyl group, and R ¹² is a methyl group. , A butyl group and a phenyl group. P is an integer of 0 to 10, preferably 3. Further, q is an integer of 2 or more, preferably an integer of 10 or more, more preferably an integer of 30 or more. ] It is a compound shown by this.

  The one-end radical polymerizable polysiloxane (b) can be prepared by a known method, but a commercially available product can also be used. Examples of commercially available products include, for example, Silaplane (registered trademark) FM-0711 (number average molecular weight 1,000; manufactured by Chisso Corporation), Silaplane (registered trademark) FM-0721 (number average molecular weight 5,000; Chisso Corporation) And Silaplane (registered trademark) FM-0725 (number average molecular weight 10,000; manufactured by Chisso Corporation), X-22-174DX (number average molecular weight 4,600; manufactured by Shin-Etsu Chemical Co., Ltd.), and the like. . These can be used alone or in combination, but are not limited thereto.

  The fluororesin has an alkoxysilyl group as required in addition to the fluororesin (a) having a radically polymerizable unsaturated bond via a urethane bond and the one-end radically polymerizable polysiloxane (b). The monomer (c) and the monomer (d) having a hydroxyl group may be copolymerized to form.

  As the monomer (c) having an alkoxysilyl group, any monomer having a dialkoxysilyl group or trialkoxysilyl group and a radical polymerizable double bond can be used without particular limitation. Examples of such a monomer (c) include γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, γ-methacryloxypropylmethyldimethoxysilane, vinyltrimethoxysilane, and vinyltriethoxy. Silane and the like can be suitably used from the viewpoint of polymerizability.

  As the monomer (d) having a hydroxyl group, any monomer having a hydroxyl group and a radical polymerizable double bond can be used without particular limitation. For example, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate and the like are particularly preferably used from the viewpoint of adjusting the Tg of the polymer.

  The fluororesin (substrate resin) can be obtained by copolymerizing a mixture containing these components (a), (b), (c), and (d). It is preferable to use the monomer (e) in combination. Such a monomer (e) is a monomer having a functional group that does not react with components (a) to (d) other than radical polymerization, and in particular, methyl (meth) acrylate and ethyl (meth) acrylate. , N-propyl (meth) acrylate, i-propyl (meth) acrylate, n-butyl (meth) acrylate, and other (meth) acrylates are mainly preferably used.

The above fluororesin (base resin) can be obtained by polymerizing the components (a) to (e) within the following range.
(A) Component: 2 to 70% by mass, preferably 10 to 40% by mass, based on the total amount of the fluororesin
Component (b): 5 to 40% by mass, preferably 10 to 30% by mass, based on the total amount of the fluororesin
Component (c): 5 to 55% by mass, preferably 10 to 40% by mass, based on the total amount of the fluororesin
Component (d): 3 to 50% by mass, preferably 20 to 30% by mass, based on the total amount of the fluororesin
(E) Component: 0 to 85% by mass, preferably 0 to 30% by mass, based on the total amount of the fluororesin
The total amount of the components (a) to (e) is 100% by mass, and the blending ratio of each raw material is preferably adjusted so that the Tg of the fluororesin is 40 ° C. or higher. When the Tg of the fluororesin is less than 40 ° C., the Tg of the coating film after the coating is cured does not increase, and therefore non-adhesiveness tends to decrease particularly when exposed to high temperatures in summer. Moreover, the ratio of (a)-(d) component is superposed | polymerized in the ratio which does not impair the non-adhesion performance of a coating film, and its sustainability. For example, when the ratio of (a) / [(b) + (c) + (d)] exceeds 70/30 and the ratio of component (a) is large, the non-adhesiveness of the coating film 1 decreases. When the ratio of the component (a) is less than 2/98, the non-adhesive durability of the coating film 1 tends to decrease.

  As the curing agent for the fluororesin, a curing agent capable of reacting with the hydroxyl group of the fluororesin is appropriately selected. Specifically, for example, aniline aldehyde resin, urea resin, melamine resin, polyisocyanate, blocked polyisocyanate, etc. Is a typical example. For example, when a melamine resin is used as the curing agent, it is desirable to use 5 to 40% by mass with respect to 100 parts by mass of the fluororesin. If it is less than 5% by mass, the solvent resistance tends to be lowered, and if it exceeds 40% by mass, the coating film 1 tends to be brittle. Moreover, when using polyisocyanate as a hardening | curing agent, it is desirable to use 0.5-1.5 equivalent with respect to a fluorine resin. If it is less than 0.5 equivalent, the coating film 1 tends to be brittle, and if it exceeds 1.5 equivalent, the polyisocyanate added excessively reacts with water and foams, making it difficult to obtain a smooth coating surface. Further, the coating film 1 tends to be brittle.

  And the coating film 1 can be efficiently expressed by using said fluororesin and hardening | curing agent as a binder of the coating material (top coating clear coating material) for forming the coating film 1. FIG.

  As the solvent blended in the above paint, various solvents conventionally used in paints can be used. For example, toluene, xylol, acetone, methyl ethyl ketone, ethyl acetate, butanol, isobutanol, propanol , Isopropanol, ethanol, methanol, water and the like are preferable. Furthermore, a leveling agent, an antifoaming agent, a thickener and the like can be blended as necessary. Further, extender pigments can be blended as long as they do not deviate from the object of the present invention, and representative examples thereof include cinnabar, oxalate, talc, kaolin, barium sulfate, calcium carbonate. , Powdered, flaky or fiber-like glass, polyurethane, polyester, polyethylene, polystyrene and other resin powders.

  And the said coating material containing the fluorine resin and other components which copolymerized the fluorine resin (a) which has a radically polymerizable unsaturated bond through a urethane bond, and the one terminal radically polymerizable polysiloxane (b) The coating film 1 can be formed on the surface (one side or both sides) of the substrate 2 via the primer layer 3 by applying as a top coating to the surface of the primer layer 3 of the substrate 2 and then drying and curing. it can. This paint can be applied using any method such as brush painting, roller painting, spray painting or the like. Moreover, the thickness of the coating film 1 is not ask | required if nonadhesiveness is not impaired and troubles, such as peeling, do not arise, but the thickness is not ask | required, For example, it can form in 2-10 micrometers.

  In the coated plate A of the present invention as described above, it is preferable that one or both of the coating film 1 and the primer layer 3 contain an aggregate, thereby making the surface of the coating film 1 uneven and the degree of roughening. And the non-adhesiveness with the sealing material 6 can be further improved. Here, as the aggregate, inorganic aggregates such as silica, glass beads and glass powder, and resin-based aggregates such as nylon beads and acrylic beads can be used. The particle size of the aggregate can be 10 to 50 μm. If the aggregate particle size is smaller than 10 μm, the effect of roughening the surface of the coating film 1 may be reduced. If the aggregate particle size is larger than 50 μm, the paint is applied when blended into the paint. May be difficult to do. Further, the aggregate can be blended in the paint for forming the coating film 1 or the paint for forming the primer layer 3, but this blending amount is the solid content in the paint (component which becomes the coating film). It is preferable to set it as 10-15 wt% with respect to the whole quantity. If the amount of aggregate is less than 10 wt%, the effect of roughening the surface of the coating film 1 may be reduced, and if the amount of aggregate is more than 15 wt%, the paint may be difficult to apply. is there. In the present invention, the above aggregates can be used alone or in combination of two or more. And in this invention, it is preferable to make centerline average roughness Ra into 1.3 micrometer or more and 6.0 micrometers or less by the measurement by JISB0601-1982 by the surface roughness of the coating film 1 by mix | blending aggregate.

  The joiner B of the present invention can be formed in a long shape by bending the non-adhesive coated plate A by roll molding or the like and cutting it as necessary. The joiner B can be formed in a desired shape. For example, the joiner B can be formed in a hat shape as shown in FIG. The hat-shaped joiner B has a U-shaped receiving section 7 composed of a flat contact piece 10 and support pieces 11 and 11 projecting from both ends of the contact piece 10 to the back surface side (indoor side direction). The fixing portions 12 and 12 are provided so as to project from both end portions of the receiving portion 7 toward the outside (opposite the contact piece 10). And the said coating film 1 should just be formed in the surface (outdoor side surface) of the contact piece 10 of the receiving part 7 at least. Of course, the coating film 1 may be formed on the surface of the support piece 11 or the fixed piece 12.

  In forming a wall such as an outer wall using the joiner B of the present invention, first, the joiner B is disposed on the surface (outside side surface) of a wall base such as a pillar, and the fixing piece 12 is fixed to the wall base with a fixing tool such as a screw. Secure to. Thus, the joiner B is attached to the wall base long in the vertical direction. Next, as shown in FIG. 3, plate-like building boards (wall boards) 4, 4 are arranged on both sides of the joiner B attached to the wall base, and the side end surfaces of the building board 4 are brought into contact with the outer surface of the support piece 11. In this state, the building board 4 is fixed to the wall base with a fixing tool such as a drill screw. Here, examples of the building board 4 include a heat insulating panel (sandwich panel) in which a heat insulating material such as rock wool is filled between two metal plates such as steel plates, and a cement-based exterior material. Is not to be done. Moreover, the thickness dimension of the building board 4 can be made larger than the thickness dimension (dimension from the fixed piece 12 to the surface of the contact piece 10) of the receiving part 7 of Joiner B.

  In this manner, two building boards adjacent to the surface of the abutting piece 10 are provided by arranging the two adjacent building boards 4 and 4 with the receiving portion 7 of the joiner B interposed therebetween. After forming the joint portion 5 that is long in the vertical direction between the side end surfaces 4 and 4 (the side end surface of the portion protruding to the surface side (outdoor side) from the contact piece 10 of the Joiner B), the joint portion 5 The sealing material 6 is pushed in from the surface side (outdoor side) of the joint portion 5 in a watertight manner over the entire length of the joint portion 5 in the vertical direction. As the sealing material 6, a synthetic resin having elasticity or flexibility such as urethane resin, silicone resin, polysulfide resin, or the like is used. In this way, a wall such as an outer wall of a building can be formed.

  And in the wall formed in this way, the sealing material 6 adheres to the side end surfaces of the building boards 4 and 4, and watertightness is ensured, but the coating 1 is applied to the surface of the contact piece 10 of the receiving portion 7. Therefore, the sealing material 6 and the surface of the contact piece 10 of the receiving portion 7 are not bonded. Therefore, when the sealing material 6 expands and contracts with respect to the expansion and contraction of the building plates 4 and 4, an excessive force is not applied to the sealing material 6, and the sealing material 6 is cut or the No peeling occurs and the waterproofness of the joint portion 5 can be ensured. Further, since the joiner B is not bonded to the sealing material 6, it is not necessary to attach a member such as a tape, and the joiner B can be formed with reduced labor and cost.

  Hereinafter, the present invention will be described specifically by way of examples.

(Examples 1 to 10)
A polyester-based resin paint (part number “V Knit # 7520” manufactured by Dainippon Paint Co., Ltd., containing a high molecular weight polyester of 12000) is applied as an undercoat on the surface of a steel sheet (base material 2) having a thickness of 0.35 mm, and baked 30 The primer layer 3 was formed by drying and curing at a maximum temperature of 220 ° C. for 2 seconds. Next, a fluororesin paint (part number “V Magic # 10” manufactured by Dainippon Paint Co., Ltd.) is applied as a top coat on the surface of the primer layer 3, and is baked for 30 seconds at a maximum temperature of 230 ° C. for drying and curing. Thus, the coating film 1 was formed. In this way, a coated plate A was formed.

  The film thickness (weight per unit area) of the primer layer 3 and the type and particle size and blending amount of the aggregate, the film thickness (weight per unit area) and the type and particle size and blending amount of the aggregate 1 Table 1 shows the surface roughness (Ra).

  In addition, the fluororesin coating material used for the above-mentioned top coating material is prepared by the following steps (1) to (3). The following “parts” indicate parts by mass.

(1) Synthesis of fluoropolymer (a) having radical polymerizability through urethane bond A glass reactor equipped with a mechanical stirrer, thermometer, condenser, and dry nitrogen gas inlet is connected to cefral coat CF-803 1, 554 parts, xylene 233 parts, and 2-isocyanatoethyl methacrylate 6.3 parts were added and heated to 80 ° C. in a dry nitrogen atmosphere. After reacting at 80 ° C. for 2 hours and confirming that the absorption of isocyanate disappeared by the infrared absorption spectrum of the sample, the reaction mixture was taken out to obtain component (a) having a nonvolatile content of 50%.

(2) Synthesis of a fluororesin obtained by copolymerizing a fluororesin (a) having a radically polymerizable unsaturated bond via a urethane bond and a one-end radically polymerizable polysiloxane (b) Mechanical stirrer, thermometer, A glass reactor equipped with a condenser and a dry nitrogen gas inlet was charged with 40 parts of component (a) synthesized in (1) above and 80 parts of n-butyl acetate, and heated to 90 ° C. in a nitrogen atmosphere. Premixed 20 parts methyl methacrylate, 7 parts 2-ethylhexyl methacrylate, 23 parts 2-hydroxyethyl methacrylate, 10 parts FM-0721, 20 parts γ-methacryloxypropyltrimethoxysilane, 2 parts perbutyl O, 22 parts xylene Was added dropwise at the same temperature over 2 hours. After maintaining at the same temperature for 2 hours, 1 part of perbutyl O was added, and further maintained at 90 ° C. for 5 hours, whereby a desired fluororesin (substrate) having a non-volatile content of 45% and a weight average molecular weight of 58,000 Resin).

(3) Preparation of fluorine-based resin paint 1.0 equivalent of Coronate (registered trademark) HX is added to the fluorine-based resin (substrate resin) obtained in (2) above with respect to the hydroxyl equivalent of the resin. Was diluted with n-butyl acetate so that the non-volatile content was 35% by weight. The top coating material is prepared by blending the aggregate with the fluororesin coating material thus obtained as required.

The materials used in the above (1) to (3) are as follows.
・ Fluorine resin having a hydroxyl group (a-1)
Cefalcoat (trademark) CF-803 (manufactured by Central Glass Co., Ltd., hydroxyl value; 60, number average molecular weight; 15,000)
・ One-end radical polymerizable polysiloxane (b)
Silaplane (registered trademark) FM-0721 (manufactured by Chisso Corporation, number average molecular weight 5,000)
Radical polymerization initiator Perbutyl (registered trademark) O (t-butylperoxy-2-ethylhexanoate; manufactured by NOF Corporation)
Curing agent Coronate (registered trademark) HX (Isocyanurate type polyisocyanate of hexamethylene diisocyanate; manufactured by Nippon Polyurethane Co., Ltd.)
(Example 11)
A coated plate A is formed in the same manner as in Example 9 except that an epoxy resin paint (part number “V knit # 20 primer” manufactured by Dainippon Paint Co., Ltd., baking for 30 seconds, maximum temperature of 220 ° C.) is used as the undercoat. did.

Example 12
A coated plate A was formed in the same manner as in Example 1 except that the undercoat paint of Example 1 was used in combination with the overcoat paint of Example 6 in combination.

(Comparative Example 1)
Epoxy resin paint (Nippon Fine Coatings product number “GL64P”, baking for 45 seconds, maximum temperature of 250 ° C.) as the undercoat, and fluorine resin paint (Nippon Fine Coatings product number “Dick Flow EF” as the top coat A coated plate A was formed in the same manner as in Example 1 except that a fluorine-containing resin of 2 fluoride type (PVDF), baking for 45 seconds, and a maximum temperature of 250 ° C. was used. This difluoride type fluororesin is different from the fluororesin of Example 1 in that the functional group does not have polysiloxane (component (b)).

(Comparative Example 2)
Epoxy resin paint (Nippon Fine Coatings product number “667P”, 30 seconds baking, maximum temperature 200 ° C.) as the undercoat paint, and polyester resin paint (Nippon Fine Coatings product number “FLC300HQ”, A coated plate A was formed in the same manner as in Example 1 except that the maximum temperature reached 220 ° C. for 30 seconds was used.

(Comparative Example 3)
A coated plate A was formed in the same manner as in Comparative Example 2, except that the aggregate shown in Table 1 was added to the top coat.

  The following performance was evaluated about the coating board of Examples 1-12 and Comparative Examples 1-3.

[Processed part adhesion]
For the coated plates of Examples 1 to 12 and Comparative Examples 1 to 3, a bending test is performed based on 13.2.2 of JIS G 3322, and then a tape is applied to the 2T bent part and rubbed with a finger. It was determined whether or not the top coat was peeled off when the tape was peeled off. And, the case where the top coat film does not peel at all is ○ (good), the case where the top coat film is partially peeled is △ (normal), and the case where most of the top coat film is peeled is × (bad). Judged.

[Scratch property]
A 10-yen coin was lightly rubbed at an angle of 45 ° to the top coat film of the coated plate to determine whether the top coat film was peeled off. And the thing in which a top coat film does not peel at all was judged as (good), and the thing from which a top coat film peeled was judged as x (bad).

[Sealing material non-adhesive (release)]
The painted plate was subjected to a bending process or the like to produce a hat-shaped joiner B having a cross section. Thereafter, various sealing materials 6 are applied to the surface of the abutting piece 10 of the receiving portion 7 of the joiner B, cured for 7 days, and then sealed from the joiner B when the sealing material 6 is pinched with a finger and pulled. The peelability of the material 6 was sensorially evaluated with a sense. And the case where it peeled completely (circle) (good), the case where it peeled partially was determined to be (normal), and the case where it adhered completely was determined to be x (bad). Moreover, as the sealing material 6, those made of urethane resin, those made of modified silicone resin, and those made of polysulfide resin were used.

  The above performance is shown in Table 1.

  In Examples 1 to 10 and 12, there was no problem in practical use of the processed part adhesion and scratch property, and the sealing material non-adhesiveness was good. In particular, by forming the primer layer 3 with a polyester resin paint, the adhesion of the coating film 1 was improved, and the adhesion of the processed part and the scratch property were increased. On the other hand, although Example 11 had high sealing material non-adhesiveness, the process part adhesiveness and scratch property became low. Moreover, in Comparative Examples 1-3, although process part adhesiveness and scratch property were high, sealing material non-adhesiveness was low.

It is sectional drawing which shows the coating board of this invention. It is a one part perspective view which shows a joiner same as the above. It is a partial perspective view which shows the construction state same as the above. It is a perspective view which shows a prior art example.

Explanation of symbols

A Paint board B Joiner 1 Paint film 2 Base material 3 Primer layer 4 Building board 5 Joint part 6 Sealing material 7 Receiving part

Claims (6)

  A coated plate comprising a sealing material filled in a joint and a coating film having no adhesiveness on the surface of the base material.   2. The coating film according to claim 1, comprising a fluororesin obtained by copolymerizing a fluororesin having a radically polymerizable unsaturated bond via a urethane bond and a one-terminal radically polymerizable polysiloxane. Painted board.   The coated plate according to claim 1 or 2, wherein a primer layer is provided between the coating film and the surface of the substrate.   The coated plate according to any one of claims 1 to 3, wherein aggregate is contained in at least one of the coating film and the primer layer.   A joiner for holding a sealing material to be filled in a joint part of an adjacent building board, wherein a receiving part that contacts the sealing material is formed using the painted board according to any one of claims 1 to 4, A joiner characterized in that a coating film is provided on the part.   The joiner according to claim 5, wherein the paint plate according to any one of claims 1 to 4 is formed into a cross-sectional hat shape by bending.

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