JP7129176B2 - One-liquid normal temperature moisture curing sealant composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a one-liquid room-temperature moisture-curable sealant composition. In particular, the present invention relates to a one-liquid room-temperature moisture-curable sealant composition suitable for wall materials having a natural stone-like surface texture.

Conventionally, sand wall-like spraying materials (ricin) and pottery stone-like spraying materials (skins) are typical examples of light-applied finish coating materials for imparting design to the surface of wall materials. Examples of sealing materials suitable for ricin-sprayed wall materials include the sand wall-like surface finish sealing material composition described in Patent Document 1, and the light diffuse reflection sufficiently large described in Patent Document 2, which is dull and sandy. Examples include one-part moisture-curable curable compositions and sealant compositions having a rough appearance with relatively large unevenness.

On the other hand, as a wall material having a natural stone-like surface texture such as split stone tone or stone texture, a lightweight cellular concrete panel having a plurality of ridges and grooves arranged on the surface at a required pitch is used. A lightweight cellular concrete panel is known in which a split pattern is formed on the ridges (see, for example, Patent Document 3). Also, a building board having a block-like pattern in which a plurality of convex blocks partitioned by vertical and horizontal joint grooves are arranged vertically and horizontally on the surface, wherein one or both side edges defining the vertical and horizontal joint grooves have straight parts or curves There is known a building board in which joint groove widths in vertical and horizontal joints are varied by mixing a portion and a curved portion (see, for example, Patent Document 4).

JP-A-2001-059083 Japanese Patent Application Laid-Open No. 2003-089742 JP-A-11-254417 JP 2004-316277 A

However, when using the wall material as described in Patent Documents 3 and 4, it is difficult to harmonize the surface texture of the wall material and the surface shape of the sealing material with the conventional sealing material.

Therefore, the object of the present invention is to provide a wall material having a surface texture with relatively clear unevenness of natural stone tone (natural stone tone) without impairing the basic performance (elongation at maximum load, stain resistance, etc.), and a natural stone wall material. A one-liquid room-temperature and moisture-curing type that has a surface texture with relatively clear unevenness of the tone (natural stone look) and forms an appearance with a sense of unity with the joint structure of the wall material that has a joint structure with joint grooves formed on the surface. An object of the present invention is to provide a sealant composition.

In order to achieve the above object, the present invention provides (A) a crosslinkable silicon group-containing organic polymer, (B) an inorganic porous expanded body having an average particle size of more than 0.5 mm and not more than 2 mm, (D) an aliphatic amine compound having a melting point of 30° C. or higher, and (B) an inorganic porous expansible body having a volume concentration of 2 vol % or more and 15 vol % with respect to the one-liquid room temperature moisture curing sealant composition Provided is a one-liquid room-temperature, moisture-curable sealant composition that contains in the following range and matches wall materials having a natural stone-like surface texture.

According to the one-liquid room-temperature moisture-curable sealant composition according to the present invention, the natural stone-like (natural stone-like) unevenness is relatively clear without impairing the basic performance (elongation at maximum load, stain resistance, etc.). A sense of unity with the joint structure of wall materials that have a surface texture or a wall material that has a natural stone-like (natural stone-like) surface texture with relatively clear unevenness and a joint structure in which joint grooves are formed on the surface. It is possible to provide a one-liquid room-temperature moisture-curable sealant composition that forms an appearance.

It is a figure which shows a lysine-like wall surface. It is a figure which shows the wall surface of a natural stone tone. It is a schematic diagram of a siding board with a joint pattern.

[Details of one-liquid room temperature moisture curing sealant composition]
The one-liquid room-temperature moisture-curable sealant composition according to the present invention contains (A) a crosslinkable silicon group-containing organic polymer, (B) an inorganic porous expander, and (D) an aliphatic amine compound. (hereinafter, the one-component room temperature and moisture curable sealant composition of the present invention is simply referred to as "sealant may be referred to as a "composition"). The one-liquid room-temperature moisture-curable sealant composition of the present invention comprises (B) an inorganic porous expansive body having an average particle size smaller than that of (B) an inorganic porous expansive body (C) an inorganic porous expansive body, and/or (E). It can also contain scaly material. It should be noted that harmonizing with the wall material includes harmonizing the surface texture and appearance of the wall material and/or harmonizing the surface shape and appearance of joint grooves provided on the surface of the wall material. The one-liquid room-temperature moisture-curable sealant composition according to the present invention is filled not in joints (joint grooves, joint structures, or joint patterns) provided on the surfaces of wall materials, but in joints between a plurality of wall materials. It is a sealing material that In the present invention, the term "joint" simply refers to a joint formed by a cured sealant composition, that is, a joint formed by filling a gap between wall materials. Moreover, the wall material includes a siding material, and in the following description, the siding material as the wall material will be described as an example.

(Component A: Crosslinkable Silicon Group-Containing Organic Polymer)
(A) The crosslinkable silicon group of the crosslinkable silicon group-containing organic polymer is a group that has a hydroxyl group or a hydrolyzable group bonded to a silicon atom and can be crosslinked by forming a siloxane bond. As the crosslinkable silicon group, for example, a group represented by general formula (1) is suitable.

In formula (1), R ¹ represents an organic group. R ¹ is preferably a hydrocarbon group having 1 to 20 carbon atoms. Among these, R ¹ is preferably a methyl group. R ¹ may have a substituent. When there are two or more R ¹ 's, the plurality of R ¹ 's may be the same or different. X represents a hydroxyl group or a hydrolyzable group, and when there are two or more X's, the plurality of X's may be the same or different. a is any integer of 0, 1, 2 or 3; In order to obtain a sealant composition having a sufficient curing rate in consideration of curability, a in formula (1) is preferably 2 or more, more preferably 3. In order to obtain a sealant composition having sufficient flexibility, a is preferably 2.

1 to 3 hydrolyzable groups or hydroxyl groups can be bonded to one silicon atom. When two or more hydrolyzable groups or hydroxyl groups are bonded to a crosslinkable silicon group, they may be the same or different.

The hydrolyzable group represented by X is not particularly limited. Examples thereof include alkoxy groups, acyloxy groups, ketoximate groups, aminooxy groups, alkenyloxy groups and the like. Among these, an alkoxy group is preferable from the viewpoint of being moderately hydrolyzable and easy to handle. Among alkoxy groups, a group with a smaller number of carbon atoms has higher reactivity, and the reactivity becomes lower as the number of carbon atoms increases, such as in the order of methoxy group > ethoxy group > propoxy group. A methoxy group or an ethoxy group is usually used, although it can be selected according to the purpose and application.

Examples of crosslinkable silicon groups include trialkoxysilyl groups such as trimethoxysilyl group and triethoxysilyl group; dialkoxysilyl groups such as —Si(OR) ₃ , methyldimethoxysilyl group and methyldiethoxysilyl group; SiR ¹ (OR) ₂ may be mentioned. Here, R is an alkyl group such as a methyl group or an ethyl group. The crosslinkable silicon groups may be used singly or in combination of two or more. The crosslinkable silicon groups may be attached to the main chain or side chains, or both. From the viewpoint of excellent physical properties such as tensile properties of the cured product of the sealant composition, it is preferable that the crosslinkable silicon groups are present at the ends of the molecular chains. In the organic polymer of component (A), the number of crosslinkable silicon groups is preferably 1.0 or more and 5 or less, preferably 1.1 to 3, on average per molecule of the organic polymer. more preferred.

(A) As the main chain skeleton of the crosslinkable silicon group-containing organic polymer, specifically, polyoxyalkylene polymers such as polyoxypropylene, polyoxytetramethylene, and polyoxyethylene-polyoxypropylene copolymers Hydrocarbon polymers such as ethylene-propylene copolymers, polyisobutylene, polyisoprene, polybutadiene, and hydrogenated polyolefin polymers obtained by hydrogenating these polyolefin polymers; Dibases such as adipic acid Polyester polymer obtained by condensation of acid and glycol or ring-opening polymerization of lactones; (meth)acrylic acid ester obtained by radical polymerization of monomers such as ethyl (meth)acrylate and butyl (meth)acrylate -based polymer; Vinyl-based polymer obtained by radical polymerization of monomers such as (meth)acrylic acid ester-based monomer, vinyl acetate, acrylonitrile, styrene; Graft polymer obtained by polymerizing vinyl monomer in organic polymer polysulfide-based polymer; polyamide-based polymer; polycarbonate-based polymer; diallyl phthalate-based polymer, and the like. These skeletons may be contained singly in (A) the crosslinkable silicon group-containing organic polymer, or two or more of them may be contained in blocks or at random. In the present invention, it is preferable to include a telechelic polymer (that is, a polymer substantially having silyl groups as functional groups at both ends) from the viewpoint of improving the elongation properties of the sealing material obtained by curing. Here, "substantially" means that 50% or more of the main chain skeleton is a polymer having silyl groups at both ends. Therefore, the telechelic polymer according to the present invention contains a polymer in which 50% or more of the entire main chain skeleton has silyl groups at both ends. From the viewpoint of improving elongation properties, the telechelic polymer preferably contains 60% or more, more preferably 70% or more, and 80% or more of a polymer having silyl groups at both ends of the total. is most preferred. In addition, from the viewpoint that the sealing material obtained by curing exhibits excellent adhesiveness and maintains flexibility, a predetermined amount of a polymer having a main chain skeleton of butyl (meth)acrylate and a terminal functional group should be included. is preferred. Furthermore, from the viewpoint of improving the compatibility of the sealant composition, a polymer whose main chain skeleton is composed of butyl (meth)acrylate monomer units and stearyl (meth)acrylate monomer units and has a functional group at the end It is also preferable to include a predetermined amount of

Furthermore, saturated hydrocarbon polymers such as polyisobutylene, hydrogenated polyisoprene, and hydrogenated polybutadiene, polyoxyalkylene polymers, and (meth)acrylic acid ester polymers have relatively low glass transition temperatures and can be obtained. It is preferable because the cured product has excellent cold resistance. In addition, polyoxyalkylene polymers and (meth)acrylic acid ester polymers are particularly preferred because they have high moisture permeability and are excellent in deep-part curability when formed into a one-liquid type composition.

From the viewpoint of having large elongation properties and small tensile modulus (tensile stress) required for sealing materials, among these, oxyalkylene-based polymers, (meth)acrylic acid ester-based polymers, or mixtures thereof are the main chain skeletons. is preferred as In particular, the tensile modulus of the cured product of the sealant composition should have an initial 50% tensile modulus of less than 0.2 N/mm ² at a test temperature of 23°C, which is measured in accordance with the standards for siding sealants. preferable. In addition, it is preferable that the 50% tensile modulus specified in JASS8 waterproof construction (Architectural Institute of Japan) is also a low value. Further, since sealants, especially sealants used for construction, are exposed outdoors for a long period of time, it is preferable that the tensile modulus be retained even after exposure under adverse conditions. For example, it is preferred that the tensile modulus after accelerated heat exposure test does not exceed 0.2 N/mm ² .

A polyoxyalkylene polymer is essentially a polymer having repeating units represented by the general formula (2).
-R ² -O- (2)
In general formula (2), R ² is a linear or branched alkylene group having 1 to 14 carbon atoms, preferably a linear or branched alkylene group having 1 to 14 carbon atoms, and 2 to 4 carbon atoms. A linear or branched alkylene group of is more preferred.

Specific examples of the repeating unit represented by formula (2) include -CH ₂ O-, -CH ₂ CH ₂ O-, -CH ₂ CH(CH ₃ )O-, -CH ₂ CH(C ₂ H ₅ )O—, —CH ₂ C(CH ₃ ) ₂ O—, —CH ₂ CH ₂ CH ₂ CH ₂ O—, and the like. The main chain skeleton of the polyoxyalkylene polymer may consist of one type of repeating unit, or may consist of two or more types of repeating units. A main chain skeleton composed of a polymer containing oxypropylene as a main component is particularly preferred.

The molecular weight of the oxyalkylene polymer having a crosslinkable silicon group is preferably high in order to reduce the tensile modulus, which is the initial tensile property of the cured product, and to increase the elongation at break. In the present invention, the lower limit of the number average molecular weight of the oxyalkylene polymer is preferably 15,000, more preferably 18,000 or more, and even more preferably 20,000 or more. As the molecular weight increases, the viscosity of the polymer increases and the viscosity of the sealant composition also increases. Also, the upper limit of the number average molecular weight is preferably 50,000, more preferably 40,000. In addition, the number average molecular weight according to the present invention is the polystyrene equivalent molecular weight obtained by gel permeation chromatography. If the number average molecular weight is less than 15,000, the tensile modulus and elongation at break may not be sufficient, and if it exceeds 50,000, the viscosity of the composition may increase and the workability may deteriorate.

In addition, a (meth)acrylic polymer having a number average molecular weight of 15,000 or more having a crosslinkable silicon group (hereinafter sometimes referred to as component A1) and a crosslinkable silicon group having a number average molecular weight of 15,000 or more An oxyalkylene polymer (hereinafter sometimes referred to as A2 component) can be used in combination. From the viewpoint that the sealant obtained by curing the one-liquid room-temperature moisture-curable sealant composition according to the present invention has a low modulus change rate after heating and a high elongation rate after heating, the A1 component is 10% by mass or more is preferable, 20% by mass or more is more preferable, and 30% by mass or more is particularly preferable with respect to the total amount of A1 component and A2 component.

Moderately reducing the content of crosslinkable silicon groups in the polyoxyalkylene polymer lowers the crosslink density in the cured product, resulting in a more flexible cured product in the initial stage, resulting in lower modulus properties and elongation at break. characteristics increase. In the polyoxyalkylene polymer, the crosslinkable silicon groups are preferably present in an average of 1.2 or more and 2.8 or less in one molecule of the polymer, and are present in an average of 1.3 or more and 2.6 or less. more preferably, and more preferably 1.4 or more and 2.4 or less. If the number of crosslinkable silicon groups contained in the molecule is less than 1, the curability will be insufficient. In the case of a bifunctional polymer having a straight main chain skeleton, the number of crosslinkable silicon groups of the polymer should be 1.2 or more and less than 1.9 on average per molecule of the polymer. is preferred, more preferably 1.25 or more and 1.8 or less, and even more preferably 1.3 or more and less than 1.7. In particular, when producing a so-called non-plasticized sealant composition that does not contain a low molecular weight plasticizer such as a phthalate plasticizer with a molecular weight of 800 or less, further a molecular weight of 1000 or less, crosslinkability It is preferable that the number of silicon groups per polymer molecule is 1.2 to 1.8, more preferably 1.3 to 1.7, on average.

An oxyalkylene polymer having a crosslinkable silicon group may be linear or branched. From the viewpoint of reducing the tensile modulus, the oxyalkylene polymer having a crosslinkable silicon group is preferably a linear polymer. In particular, when producing a non-plasticized sealant composition, it is preferably linear. Further, the molecular weight distribution (Mw/Mn) of the oxyalkylene polymer having a crosslinkable silicon group is preferably 2 or less, particularly 1.6 or less.

Examples of the method for synthesizing the polyoxyalkylene polymer include, but are not particularly limited to, a polymerization method using an alkali catalyst such as KOH, and a polymerization method using a double metal cyanide complex catalyst. According to the polymerization method using a double metal cyanide complex catalyst, a polyoxyalkylene polymer having a number average molecular weight of 6,000 or more and a Mw/Mn of 1.6 or less and having a narrow molecular weight distribution can be obtained.

The main chain skeleton of the polyoxyalkylene polymer may contain other components such as a urethane bond component. Examples of the urethane bond component include aromatic polyisocyanates such as toluene (toluene) diisocyanate and diphenylmethane diisocyanate; and aliphatic polyisocyanates such as isophorone diisocyanate obtained from the reaction of polyoxyalkylene polymers having hydroxyl groups. Ingredients can be mentioned.

A polyoxyalkylene polymer having a functional group such as an unsaturated group, a hydroxyl group, an epoxy group, or an isocyanate group in the molecule is reacted with a functional group reactive to the functional group and a crosslinkable silicon group. Thus, a crosslinkable silicon group can be introduced into the polyoxyalkylene polymer (hereinafter referred to as the polymer reaction method).

As an example of a polymer reaction method, a polyoxyalkylene polymer containing an unsaturated group is reacted with a hydrosilane having a crosslinkable silicon group or a mercapto compound having a crosslinkable silicon group to hydrosilylate or mercaptate, and the crosslinkable silicon group A method for obtaining a polyoxyalkylene polymer having An unsaturated group-containing polyoxyalkylene polymer is obtained by reacting an organic polymer having a functional group such as a hydroxyl group with an organic compound having an active group and an unsaturated group that are reactive with this functional group, and obtaining an unsaturated group. A polyoxyalkylene polymer containing can be obtained.

Further, as other examples of the polymer reaction method, a method of reacting a polyoxyalkylene polymer having a terminal hydroxyl group with an isocyanate group and a crosslinkable silicon group, and a method of reacting a polyoxyalkylene polymer having a terminal isocyanate group. A method of reacting the coalescence with an active hydrogen group such as a hydroxyl group or an amino group, or a crosslinkable silicon group can be mentioned. By using an isocyanate compound, a polyoxyalkylene polymer having a crosslinkable silicon group can be easily obtained.

The polyoxyalkylene polymer having a crosslinkable silicon group may be used alone or in combination of two or more.

Various monomers can be used as the (meth)acrylic acid ester-based monomer that constitutes the main chain of the (meth)acrylic acid ester-based polymer. For example, (meth) acrylic acid-based monomers such as acrylic acid; methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (meth) acrylic (meth) acrylic acid alkyl ester monomers such as stearyl acid; alicyclic (meth) acrylic acid ester monomers; aromatic (meth) acrylic acid ester monomers; ) acrylic acid ester-based monomers; silyl group-containing (meth)acrylic acid ester-based monomers such as γ-(methacryloyloxypropyl)trimethoxysilane and γ-(methacryloyloxypropyl)dimethoxymethylsilane; (meth)acrylic acid derivatives; Fluorine-containing (meth)acrylic acid ester-based monomers and the like are included.

In the (meth)acrylate polymer, the following vinyl monomers can be copolymerized together with the (meth)acrylate monomer. Examples of vinyl monomers include styrene, maleic anhydride, and vinyl acetate. In addition, acrylic acid and glycidyl acrylate may be contained as monomer units (hereinafter also referred to as other monomer units).

These may be used alone or may be copolymerized. From the viewpoint of physical properties of the product, a polymer composed of a (meth)acrylic acid-based monomer is preferable. Further, a (meth)acrylic acid ester-based polymer using one or two or more (meth)acrylic acid alkyl ester monomers in combination with other (meth)acrylic acid monomers as necessary is more preferable. Furthermore, by using a silyl group-containing (meth)acrylic acid ester monomer together, the number of silicon groups in the (meth)acrylic acid ester polymer can be controlled. A methacrylic acid ester-based polymer composed of a methacrylic acid ester monomer is particularly preferable because of its good adhesiveness. Further, when the viscosity is lowered, flexibility is imparted, and tackiness is imparted, it is preferable to appropriately use an acrylic acid ester monomer. In the present invention, (meth)acrylic acid represents acrylic acid and/or methacrylic acid.

A method for producing a (meth)acrylic acid ester-based polymer can use, for example, a radical polymerization method using a radical polymerization reaction. The radical polymerization method includes a radical polymerization method (free radical polymerization method) in which predetermined monomer units are copolymerized using a polymerization initiator, and a controlled radical polymerization method that can introduce a reactive silyl group at a controlled position such as a terminal. polymerization method. However, a polymer obtained by a free radical polymerization method using an azo compound, a peroxide, or the like as a polymerization initiator generally has a large molecular weight distribution value of 2 or more and a high viscosity. Therefore, in the case of obtaining a (meth)acrylic acid ester polymer having a narrow molecular weight distribution, a low viscosity, and a crosslinkable functional group at the molecular chain end in a high proportion, , it is preferred to use a controlled radical polymerization method.

The controlled radical polymerization method includes a free radical polymerization method and a living radical polymerization method using a chain transfer agent having a specific functional group. Addition-fragmentation transfer reaction (Reversible Addition-Fragmentation chain Transfer; RAFT) polymerization method, radical polymerization method using a transition metal complex (Transition-Metal-MediatedLivingRadicalPolymerization), atom transfer radical polymerization method (Atom-Transfer-Radical-Polymerization; ATRP), etc. It is preferable to adopt a living radical polymerization method such as Also preferred are reactions using a thiol compound having a reactive silyl group and reactions using a thiol compound having a reactive silyl group and a metallocene compound.

These organic polymers having a crosslinkable silicon group may be used alone or in combination of two or more. Specifically, a group consisting of a polyoxyalkylene polymer having a crosslinkable silicon group, a saturated hydrocarbon polymer having a crosslinkable silicon group, and a (meth)acrylic acid ester polymer having a crosslinkable silicon group An organic polymer in which two or more selected from are blended can also be used. In particular, an organic polymer obtained by blending a polyoxyalkylene polymer having a crosslinkable silicon group and a (meth)acrylate polymer having a crosslinkable silicon group has excellent properties. When applied to the sealant composition according to the present invention, elongation at maximum load and adhesive strength can be increased.

There are various methods for producing an organic polymer obtained by blending a polyoxyalkylene polymer having a crosslinkable silicon group and a (meth)acrylic acid ester polymer having a crosslinkable silicon group. For example, having a crosslinkable silicon group, the molecular chain substantially has the general formula (3):
—CH ₂ —C(R ³ )(COOR ⁴ )— (3)
(Wherein, R ³ is a hydrogen atom or a methyl group, R ⁴ is an alkyl group having 1 to 5 carbon atoms) and a (meth)acrylic acid ester monomer unit represented by the general formula (4):
—CH ₂ —C(R ³ )(COOR ⁵ )— (4)
(Wherein, R ³ is the same as described above, R ⁵ represents an alkyl group having 6 or more carbon atoms) to a copolymer consisting of a (meth) acrylic acid ester monomer unit, a crosslinkable silicon group A method of producing by blending a polyoxyalkylene polymer having

R ⁴ in general formula (3) includes, for example, a methyl group, an ethyl group, a propyl group, an n-butyl group, a t-butyl group, etc., having 1 to 5 carbon atoms, preferably 1 to 4 carbon atoms, and further An alkyl group having 1 to 2 carbon atoms is preferred. The alkyl group for ^R4 may be used alone or in combination of two or more.

R ⁵ in the general formula (4) is, for example, a 2-ethylhexyl group, a lauryl group, a stearyl group, etc. having 6 or more carbon atoms, usually 7 to 30 carbon atoms, preferably 8 to 20 carbon atoms. Chain alkyl groups are included. As in the case of ^R4 , the alkyl groups for R5 may be used singly or in combination of ^two or more.

The molecular chain of the (meth)acrylic acid ester copolymer substantially consists of the monomer units of the formulas (3) and (4). Here, "substantially" means that the total amount of the monomer units of formulas (3) and (4) present in the copolymer exceeds 50% by mass. The total amount of the monomer units of formulas (3) and (4) is preferably 70% by mass or more. The mass ratio of the monomer units of formula (3) to the monomer units of formula (4) is preferably 95:5 to 40:60, more preferably 90:10 to 60:40.

(Meth) having a crosslinkable silicon group used in a method for producing an organic polymer obtained by blending a polyoxyalkylene polymer having a crosslinkable silicon group and a (meth)acrylic acid ester polymer having a crosslinkable silicon group Examples of the acrylic acid ester-based polymer include (meth)acrylic acid alkyl ester monomer units having a crosslinkable silicon group and having a molecular chain substantially (1) having an alkyl group having 1 to 8 carbon atoms; , (2) a (meth)acrylic ester-based copolymer such as a (meth)acrylic ester-based copolymer containing a (meth)acrylic acid alkyl ester monomer unit having an alkyl group having 10 or more carbon atoms Coalescing can also be used.

When the glass transition temperature (Tg) of the (meth)acrylic acid ester polymer is less than 0° C., the number average molecular weight of the (meth)acrylic acid ester polymer is, for example, acrylic When mainly composed of butyl acid monomer units, it is preferably 20,000 or more, more preferably 30,000 or more, even more preferably 35,000 or more, and particularly preferably 40,000 or more. Further, when the glass transition temperature (Tg) of the (meth)acrylic acid ester polymer is 0° C. or higher, for example, when the (meth)acrylic acid ester polymer is mainly composed of methyl methacrylate monomer units, The number average molecular weight is preferably 600 or more and 10,000 or less, more preferably 600 or more and 5,000 or less, and even more preferably 1,000 or more and 4,500 or less. By setting the number average molecular weight within this range, the compatibility with the polyoxyalkylene polymer having a crosslinkable silicon group is improved. The (meth)acrylate polymers may be used alone or in combination of two or more. There is no particular limitation on the blending ratio of the polyoxyalkylene polymer having a crosslinkable silicon group and the (meth)acrylic acid ester polymer having a crosslinkable silicon group, but the (meth)acrylic acid ester polymer When the glass transition temperature (Tg) is less than 0° C., for example when the (meth)acrylic acid ester polymer is mainly composed of butyl acrylate monomer units, the (meth)acrylic acid ester polymer and the polyoxy It is preferable that the (meth)acrylic acid ester polymer is in the range of 30 parts by mass or more and 90 parts by mass or less, and 40 parts by mass or more and 80 parts by mass or less. It is more preferably in the range of 50 parts by mass or more and 70 parts by mass or less. If the (meth)acrylic acid ester-based polymer is more than 90 parts by mass, the viscosity increases and the workability deteriorates, which is not preferable. Further, when the glass transition temperature (Tg) of the (meth)acrylic acid ester polymer is 0° C. or higher, for example, when the (meth)acrylic acid ester polymer is mainly composed of methyl methacrylate monomer units, The (meth)acrylic acid ester polymer is in the range of 10 parts by mass or more and 60 parts by mass or less with respect to a total of 100 parts by mass of the (meth)acrylic acid ester polymer and the polyoxyalkylene polymer. , more preferably 20 to 50 parts by mass, and even more preferably 25 to 45 parts by mass. If the (meth)acrylic acid ester-based polymer is more than 60 parts by mass, the viscosity increases and the workability deteriorates, which is not preferable.

Furthermore, in the present invention, an organic polymer obtained by blending a saturated hydrocarbon polymer having a crosslinkable silicon group and a (meth)acrylic acid ester copolymer having a crosslinkable silicon group can also be used. As another method for producing an organic polymer obtained by blending a (meth)acrylic acid ester copolymer having a crosslinkable silicon group, in the presence of an organic polymer having a crosslinkable silicon group (meth ) A method of polymerizing acrylic acid ester-based monomers can be used.

(Component B: Inorganic porous expanded body)
(B) The inorganic porous expandable body is, for example, an inorganic porous expandable body that can be obtained by heating and expanding glass waste material and having an average particle size of more than 0.5 mm and 2 mm or less. . (B) The inorganic porous expandable body has sufficient strength in addition to matching the appearance of the surface texture of the siding material of which the sealing material is a wall material. It is also possible to suppress deterioration in the physical properties of the cured product of the sealant composition over time. When transparent particles (such as glass beads) are used, the appearance changes (becomes dark) in a bright place, and the appearance does not match with the siding material which is the wall material, which is not preferable. The inorganic porous expanded body is excellent in heat resistance, weather resistance and durability, and has a porous surface. Good.

As the inorganic porous expander, for example, a commercially available Product Specification For Poraver made by Germany (trade name: Poraver) can be used. There are the following types of particle size (however, this is a range value obtained by sieving using a metal mesh sieve).

0.1 mm to 0.3 mm (particle density 0.66, average particle size 0.2 mm)
0.3 mm to 0.5 mm (particle density 0.52, average particle size 0.4 mm)
0.5 mm to 1 mm (particle density 0.43, average particle size 0.75 mm)
1 mm to 2 mm (particle density 0.34, average particle size 1.5 mm)
2 mm to 4 mm (particle density 0.32, average particle size 3 mm)
4 mm to 8 mm (particle density 0.61, average particle size 6 mm)

The average particle size is calculated using the following formula, and the particle density is a value calculated by an immersion method using isopropyl alcohol (IPA) as an immersion liquid.

[average particle size] = ([minimum particle size] + [maximum particle size]) / 2

In the present invention, natural stone texture such as cracked stone texture, stone surface texture, and stone texture can be used without impairing the basic performance (elongation at maximum load, stain resistance, etc.) of the one-liquid room temperature moisture curing sealant composition. From the viewpoint of forming an appearance with a sense of unity between the siding material having a surface texture and a high-class feeling and the cured product of the one-liquid room temperature and moisture-curable sealant composition, (B) the average particle size of the inorganic porous expandable material The size is preferably in the range of more than 0.5 mm and 2 mm or less. If the average particle size is 0.5 mm or less, it is difficult to obtain a sense of unity with the natural stone-like siding material. If the average particle size exceeds 2 mm, the basic performance as a sealing material may deteriorate. The average particle size is more preferably in the range of more than 0.5 mm and 1.0 mm or less, and still more preferably in the range of 0.7 mm or more and 0.9 mm or less.

(Component C: (B) Inorganic porous expanded body having a smaller average particle size than the inorganic porous expanded body)
In the present invention, an inorganic porous expander having an average particle size smaller than that of the component (B) can be further added as the component (C). For example, an inorganic porous expandable body having an average particle size of 0.2 mm or more and 0.5 mm or less (hereinafter referred to as "small size inorganic porous expandable body ) can be used together. A sense of unity with the siding material is further improved when a small-sized inorganic porous expander is used together. The average particle size of the small-sized inorganic porous expanded material is preferably in the range of 0.3 mm or more and 0.5 mm or less, more preferably 0.35 mm or more and 0.5 mm or less.

When the (B) inorganic porous expandable body according to the present invention is not used, for example, the surface of a cured sealant composition using only a conventional balloon exhibits a rough surface texture (a lysine-like surface). In the case of , the balloons exist only on the surface of the coated surface), and when the (B) inorganic porous expandable body according to the present invention is used, the surface texture of the cured product of the sealant composition of the present invention becomes natural stone. (The fact that the B component is embedded in the sealant composition of the present invention also has an effect.) That is, (B) the inorganic porous expandable material causes distinct irregularities on the surface of the cured product (because it is also contained inside the composition, the irregularities are more conspicuous), so that the surface of the cured product is It can be matched with a natural stone-like surface texture.

(B) The blending amount of the inorganic porous expandable material is in a volume concentration range of 2 vol % or more and 15 vol % or less with respect to the one-liquid room-temperature moisture-curable sealant composition, which harmonizes with the natural stone-like surface texture. It is preferable because it exhibits the desired surface shape. If it is less than 2 vol%, the sense of unity with the natural stone-like siding material is not exhibited, and if the volume concentration exceeds 15 vol%, the basic performance (elongation rate at maximum load) is impaired. More preferably, the volume concentration ranges from 2.5 vol % to 10 vol %. In addition, the amount of the small-sized inorganic porous expansive material to be blended is preferably a volume concentration in the range of 1 vol % or more and 10 vol % or less, and 1.5 vol % or more, relative to the one-liquid room temperature moisture curing sealant composition. 8 vol % or less is more preferable.

The volume concentration is calculated using the following formula.

Volume concentration (vol%) = 100 × volume of inorganic porous expanded body (small-sized inorganic porous expanded body) / (volume of inorganic porous expanded body (small-sized inorganic porous expanded body) + volume of sealing volume)

(Component D: Aliphatic amine compound)
The one-liquid room-temperature moisture-curable sealant according to the present invention contains (D) an aliphatic amine compound having a melting point of 30° C. or higher and 140° C. or lower for the purpose of making the cured product matte. If the cured product is not matte, the joints formed by filling the gaps between the siding materials with the sealing material stand out, making it difficult to harmonize with the natural stone-like surface texture.

(D) the aliphatic amine compound according to the present invention is an aliphatic amine compound having a melting point of 30°C or higher and 140°C or lower. If the melting point is lower than 30° C., the aliphatic amine compound tends to exude from the obtained sealant composition, and when used as a sealant, the base material is contaminated and becomes a cause of contamination. If the melting point exceeds 140° C., it becomes difficult to mix with the component (A), and melting at a high temperature or a large amount of solvent is required during mixing.

(D) The content of the aliphatic amine compound having a melting point of 30 ° C. or higher and 140 ° C. or lower is 0.1 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the crosslinkable silicon group-containing organic polymer (A) is in the range of If the content is less than 0.1 parts by mass, no matting effect can be obtained, and if the content exceeds 20 parts by mass, the adhesiveness will be poor, so the above range is required.

(D) Aliphatic amine compounds having a melting point of 30° C. or higher and 140° C. or lower include, for example, laurylamine (melting point: 25° C.), stearylamine (melting point: 50° C.), etc. having one amino group per molecule. Compounds; CH ₃ (CH ₂ ) ₁₇ NH(CH ₂ ) ₃ NH ₂ (melting point 48° C.), tribenzylamine (melting point 90° C.), diphenylamine (melting point 53° C.), m-phenylenediamine (melting point 63° C.), m -Compounds having two or more amino groups in one molecule such as phenylenediamine (melting point 63° C.). In particular, aliphatic amines such as stearylamine, hexamethylenediamine and N-stearylpropylenediamine are preferred because of their greater matting effect.

A mixture of an aliphatic primary amine having a melting point of 30° C. or higher and an aliphatic secondary amine having a melting point of 30° C. or higher is preferred because it has a greater matting effect. Aliphatic primary amines having a melting point of 30° C. or higher migrate from the inside of the sealing material to the surface layer at a high speed, and thus are excellent in the effect of preventing surface contamination after outdoor exposure. When an aliphatic primary amine having a melting point of 30°C or higher and an aliphatic secondary amine having a melting point of 30°C or higher are used together, the aliphatic primary amine having a melting point of 30°C or higher migrates to the surface immediately after the sealing material is applied. After that, the aliphatic secondary amine having a melting point of 30° C. or higher migrates to the surface, and the matting effect lasts for a long period of time. In addition, fine powder coating amines described in JP-A-2008-291159 can also be preferably used.

A compound that reacts with water to form the above amine compound can also be used. Specifically, ketimine compounds, enamine compounds, and/or aldimine compounds, which are amine compounds, can be mentioned from the viewpoint of availability of raw materials, storage stability, reactivity with water, and the like. These ketimine compounds, enamine compounds and aldimine compounds can be obtained by dehydration reaction of ketones or aldehydes and amine compounds.

Examples of the ketones include aliphatic ketones such as methyl ethyl ketone, methyl isopropyl ketone and 4-methyl-2-pentanone; aromatic ketones such as benzophenone; cyclic ketones such as cyclohexanone; dicarbonyl compounds and the like. Aldehydes include, for example, isobutyraldehyde. These can be used alone or in combination of two or more. From the same viewpoint as above, 4-methyl-2-pentanone is preferred among these. Moreover, the said amine compound can also be used individually and can also use 2 or more types together.

(E component: scaly substance)
The (E) scale-like substance (scale-like substance) according to the present invention is a scale-like substance having an average diameter of approximately 0.1 mm or more and 4.0 mm or less. (E) A sealing material having a surface texture that gives a sense of unity with a natural stone-like siding material mixed with colored sand by using a scale-like substance at a volume concentration of 0.05 vol% or more and 0.9 vol% or less. can be realized. That is, by adding (E) the scaly substance, the surface texture of the cured product can be made to exhibit sand-like colors and patterns.

Here, if the volume concentration is less than 0.05 vol %, the effect of mixing colored sand is not exhibited. On the other hand, if the volume concentration of the scaly substance exceeds 0.9 vol %, the surface texture becomes unnatural, and the sense of unity with the natural stone-like siding material is not exhibited.

(E) The scaly substance has an average diameter of about 0.1 mm to 4.0 mm, and a substance having an appropriate size can be adopted according to the material, pattern, etc. of the outer wall. In the case of (E) the scaly substance, the thickness of the scaly substance is about 1/10 to 1/5 (about 0.01 to 1.00 mm) of the diameter. (E) The scaly substance preferably has an average diameter of 0.1 mm or more and 3.0 mm or less, more preferably 0.5 mm or more and 2.0 mm or less.

(E) The scaly substance is blended in an amount of about 1 part by mass or more and 200 parts by mass or less with respect to 100 parts by mass of the one-liquid room-temperature moisture-curable sealant composition. The amount to be added is appropriately selected according to the size of each scale-like substance, the material of the outer wall, the pattern, and the like.

(E) Scale-like substances include, for example, natural substances such as silica sand and mica (true specific gravity of 2.9), and inorganic substances such as synthetic rubbers, synthetic resins, and alumina. From the viewpoint of improving the design when filling joints between siding materials, it can be colored in an appropriate color according to the material, pattern, etc. of the outer wall. Among these (E) scaly substances, colored mica is preferred. Further, the scaly substance is more preferably blended at 0.05 vol% or more and 0.9 vol% or less, and more preferably 0.1 vol% or more and 0.6 vol% or less.

(Other compounding substances)
The one-liquid room-temperature moisture-curable sealant composition according to the present invention comprises the components (A), (B), and (D), and optionally the components (C) and (E). In addition to other fine hollow particles, monofunctional epoxy compounds, ketiminated aminosilane compounds, multifunctional epoxy resins, ketimine compounds having no crosslinkable silicon groups, epoxy resin curing agents other than ketiminated aminosilane compounds, plasticizers, A filler, a silanol condensation catalyst, a silane coupling agent, a diluent, a dehydrating agent, an antioxidant, an ultraviolet absorber, a lubricant, a pigment, a foaming agent, etc. may be further added.

(Micro hollow particles)
The one-liquid normal-temperature moisture-curable sealant composition of the present invention may contain (B) fine hollow particles having properties different from those of the inorganic porous expandable material. The fine hollow particles can be used together with a reinforcing filler from the viewpoint of weight reduction and cost reduction.

Such hollow microparticles (hereinafter sometimes referred to as "balloons") are not particularly limited, but have a diameter of 1 mm or less, as described in "The Latest Technology of Functional Fillers" (CMC) Hollow bodies made of inorganic or organic materials, preferably 500 μm or less, more preferably 200 μm or less, are mentioned. In particular, it is preferable to use micro hollow bodies having a true specific gravity of 1.0 g/cm ³ or less, more preferably 0.5 g/cm ³ or less.

Examples of inorganic balloons include silicate balloons and non-silicate balloons. Silicic acid-based balloons include, for example, shirasu balloons, perlite, glass balloons, silica balloons, fly ash balloons, and the like. Examples of non-silicic acid balloons include alumina balloons, zirconia balloons, and carbon balloons. Specific examples of these inorganic balloons include Winlight manufactured by Ijichi Kasei and Sanki Light manufactured by Sanki Engineering as Shirasu balloons, Celstar Z-28 manufactured by Sumitomo 3M as glass balloons, MICRO BALLOON manufactured by Emerson & Cuming, and PITTS BURGE CORNING. CELAMIC GLASSMODULES, GLASS BUBBLES made by 3M, Q-CEL made by Asahi Glass as a silica balloon, E-SPHERES made by Taiheiyo Cement, CEROSPHERES made by PFAMARKETING, FILLITE U.S.A. as a fly ash balloon. S. FILLITE manufactured by A, BW manufactured by Showa Denko as an alumina balloon, HOLLOW ZIRCONIUM SPHEES manufactured by ZIRCOA as a zirconia balloon, Krekasphere manufactured by Kureha Chemical Co., Ltd., and Carbosphere manufactured by GENERAL TECHNOLOGIES as a carbon balloon.

Organic balloons include thermosetting resin balloons and thermoplastic resin balloons. Thermosetting balloons include, for example, phenol balloons, epoxy balloons, and urea balloons. Examples of thermoplastic balloons include saran balloons, polystyrene balloons, polymethacrylate balloons, polyvinyl alcohol balloons, styrene-acrylic balloons, and the like. Balloons of crosslinked thermoplastic resin can also be used. Here, the balloon may be a balloon after foaming, or may be foamed after blending a compound containing a foaming agent.

Specific examples of these organic balloons include Union Carbide's UCAR and PHENOLIC MICROBALLOONS as phenol balloons, EMERSON & CUMING's ECCOSPHERES as epoxy balloons, EMERSON & CUMING's ECCOSPHERES VF-O as urea balloons, and DOW CHEMICAL's SARAN MICROSPHERES as saran balloons. , EXPANSEL manufactured by AKZO NOBEL, Matsumoto Microsphere manufactured by Matsumoto Yushi Seiyaku, DYLITE EXPANDABLE POLYSTYRENE manufactured by ARCO POLYMERS as polystyrene balloons, EXPANDABLE POLYSTYRENE BEADS manufactured by BASF WYANDOTE, and crosslinked styrene-acrylic acid balloon manufactured by Japan Synthetic Rubber. SX863(P) and the like.

These balloons can be used alone or in combination of two or more. Furthermore, for the purpose of improving the dispersibility and the workability of the formulation, fatty acids, fatty acid esters, rosin, lignin rosinate, silane coupling agents, titanium coupling agents, aluminum coupling agents, It may be used after being surface-treated with polypropylene glycol or the like.

The content of the balloon is not particularly limited, but is preferably 0.1 to 50 parts by mass, and is used in the range of 0.1 to 30 parts by mass, based on 100 parts by mass of the crosslinkable silicon group-containing organic polymer (A). is more preferable. If the amount is less than 0.1 parts by mass, the effect of reducing the weight is small, and if the amount is 50 parts by mass or more, a decrease in tensile strength may be observed among the mechanical properties when the one-liquid room-temperature moisture-curable sealant composition is cured. . When the specific gravity of the balloon is 0.1 or more, it is preferably 3 to 50 parts by mass, more preferably 5 to 30 parts by mass.

(Monofunctional epoxy compound)
The sealant composition according to the present invention is a compound having one epoxy group in the molecule and no crosslinkable silicon group (hereinafter referred to as monofunctional epoxy compound) may be contained. Examples of monofunctional epoxy compounds include glycidyl ethers such as alkyl monoglycidyl ether, phenyl glycidyl ether, linear alcohol monoglycidyl ether, polyglycol glycidyl ether, glycidyl methacrylate, glycidyl esters or mixtures thereof, 1,2 epoxide decane, styrene oxide. Epoxy hydrocarbons such as or mixtures thereof, cyclohexane oxide, 4-vinylepoxycyclohexane, 3,4-epoxycyclohexylmethanol, 3,4-epoxycyclohexylmethyl methacrylate, di-2-ethylhexyl epoxyhexahydrophthalate, epoxyhexahydro Alicyclic epoxy compounds such as di-2-ethylhexyl phthalate can be mentioned. Among these, alicyclic epoxy compounds are preferred.

The monofunctional epoxy compound is used in an amount of 1 to 100 parts by weight per 100 parts by weight of the crosslinkable silicon group-containing organic polymer (A).

Here, if a compound having one epoxy group in the molecule and no crosslinkable silicon group is added, the flexibility of the cured product can be improved, and the deterioration of the elongation property after being immersed in water or after being exposed to heat can be prevented. can be prevented. The sealant composition according to the present invention can have an initial 50% tensile modulus of less than 0.2 N/mm ² at a test temperature of 23° C., which is measured according to the standard for siding sealants. A monofunctional epoxy compound is required not to have a crosslinkable silicon group. In the case of having a crosslinkable silicon group, the crosslinkable silicon group causes a crosslink reaction with the polymer of component (A), so it may be difficult to improve the flexibility.

(Ketiminated aminosilane compound)
The sealant composition according to the present invention is an alkoxysilane that reacts with water to form an amine compound having at least one alkoxysilyl group in one molecule within a range that does not impair the effects of the sealant according to the present invention. A compound (ketiminated aminosilane compound) may be contained. An alkoxysilyl group is a silicon atom-containing group in which an alkoxy group is bonded to a silicon atom. Examples of such compounds include compounds obtained by converting the amino group of an amine compound having an alkoxysilyl group (hereinafter, also referred to as an aminosilane compound) into a ketimine with a carbonyl compound. Examples of aminosilane compounds to be ketiminated include γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-(2-aminoethyl)aminopropyltrimethoxysilane, γ-(2-aminoethyl)aminopropyltriethoxy silane, γ-(2-aminoethyl)aminopropylmethyldimethoxysilane, and the like.

Moreover, as the carbonyl compound, the carbonyl compound described in the section of the ketimine compound having no crosslinkable silicon group described later can be used. When an imino group is present in ketimine, the imino group may be reacted with styrene oxide; glycidyl ethers such as butyl glycidyl ether and allyl glycidyl ether; glycidyl esters;

When a compound having a ketiminized amino group is used, it does not react with the epoxy resin during storage of the composition, so that a one-component composition can be obtained. The ketiminized aminosilane compound acts as an adhesion-imparting agent, and also acts as a curing agent and a curing catalyst for epoxy resins. Two or more kinds of ketiminated aminosilane compounds can be used in combination.

The ketiminized aminosilane compound can be added in an amount of 0.1 to 20 parts by mass, preferably 1 to 10 parts by mass, per 100 parts by mass of the polymer of component (A).

(Polyfunctional epoxy resin)
The sealant composition according to the present invention may contain a polyfunctional epoxy resin as long as the effects of the sealant according to the present invention are not impaired. Various epoxy resins, which are compounds having two or more epoxy groups in the molecule, can be used as polyfunctional epoxy resins. Examples of epoxy resins include epichlorohydrin-bisphenol A type epoxy resins, epichlorohydrin-bisphenol F type epoxy resins, flame-retardant epoxy resins such as glycidyl ether of tetrabromobisphenol A, novolac type epoxy resins, and hydrogenated bisphenol A type epoxy resins. , bisphenol A propylene oxide adduct glycidyl ether type epoxy resin, p-oxybenzoic acid glycidyl ether ester type epoxy resin, m-aminophenol type epoxy resin, diaminodiphenylmethane type epoxy resin, urethane modified epoxy resin, various alicyclic epoxy resins, Unsaturated polymers such as N,N diglycidylaniline, N,N diglycidyl-o-toluidine, triglycidyl isocyanurate, polyalkylene glycol diglycidyl ether, glycidyl ether of polyhydric alcohol such as glycerin, hydantoin type epoxy resin, petroleum resin, etc. and the like. Among these epoxy resins, a compound containing at least two epoxy groups represented by the following formula (5) in the molecule has high reactivity when cured, and the cured product forms a three-dimensional network. It is preferable from the viewpoint of ease of use.

Further, as polyfunctional epoxy resins, epoxy resins having an aromatic ring such as bisphenol A type epoxy resins, bisphenol F type epoxy resins, bisphenol AD type epoxy resins, and novolac type epoxy resins are more preferable. Among such epoxy resins having an aromatic ring, compounds having an aromatic ring and not having an oxyalkylene chain, which is a segment that imparts flexibility, are preferred from the viewpoint of adhesion to substrates. is particularly preferred. Furthermore, bisphenol A type epoxy resins are most preferred, and bisphenol A type epoxy resins having no oxyalkylene chain are particularly preferred. A compound having two or more epoxy groups in the molecule has the function of improving the adhesiveness of an organic polymer having a crosslinkable silicon group, particularly an oxyalkylene polymer having a crosslinkable silicon group. The epoxy resin is preferably liquid at room temperature. Moreover, the molecular weight of the epoxy resin is preferably 500 or less.

The amount of the polyfunctional epoxy resin to be blended is in the range of 1 to 50 parts by mass with respect to 100 parts by mass of the crosslinkable silicon group-containing organic polymer (A). If it is less than 1 part by mass, the adhesiveness of the cured sealant composition will be insufficient, and if it exceeds 50 parts by mass, the cured sealant composition will be insufficiently flexible. A preferable range is from 1 part by mass to 30 parts by mass, more preferably from 1 part by mass to 20 parts by mass, and even more preferably from 1 part by mass to 10 parts by mass.

(ketimine)
The sealant composition according to the present invention is a compound having a ketimine group in the molecule and not having a crosslinkable silicon group (hereinafter referred to as ketimine or ketimine compound), that is, a ketimine compound that does not have a crosslinkable silicon group. By adding a ketimine compound having no crosslinkable silicon group to the sealant composition, the modulus change rate of the cured product of the sealant composition can be reduced. That is, by adding a ketimine compound that does not have a crosslinkable silicon group to the sealant composition, even after the cured product of the sealant composition is exposed to heat, the modulus is suppressed from reaching a predetermined value or more, Flexibility can be maintained, and reduction in elongation at break after immersion in water or exposure to heat can be suppressed.

Ketimine exists stably in the absence of moisture, and is decomposed into primary amine and ketone by moisture, and the resulting primary amine acts as a silanol condensation catalyst. After that, by reacting with the epoxy resin, the silanol condensation catalytic action is deactivated, and the low modulus can be maintained even after the cured product is exposed to heat. Also, the use of ketimine allows a one-component composition because it does not react with the epoxy resin during storage of the composition. Such ketimine can be obtained by a condensation reaction between an amine compound and a carbonyl compound.

Various amine compounds and carbonyl compounds can be used to synthesize ketimine. Examples of amine compounds include monoamines such as 2-ethylhexylamine, laurylamine, stearylamine and i-stearylamine; diamines such as ethylenediamine, tetramethylenediamine and hexamethylenediamine; Polyvalent amines such as (aminomethyl)methane; polyalkylenepolyamines such as diethylenetriamine and triethylenetriamine; and polyoxyalkylene polyamines can be used.

Examples of carbonyl compounds include aldehydes such as acetaldehyde and benzaldehyde; cyclic ketones such as cyclohexanone; aliphatic ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; A compound or the like can be used. When an imino group is present in ketimine, the imino group may be reacted with styrene oxide; glycidyl ethers such as butyl glycidyl ether and allyl glycidyl ether; glycidyl esters;

For the purpose of keeping the cured product of the sealant composition flexible, it is possible to use a ketiminated monoamine obtained by a condensation reaction between a monoamine and a carbonyl compound, or a ketiminated diamine obtained by a condensation reaction between a diamine and a carbonyl compound. Preferably, it is more preferable to use a ketiminated monoamine. These ketimines may be used alone or in combination of two or more. Further, the amount of the ketimine compound having no crosslinkable silicon group can be used in the range of 0.1 to 20 parts by mass, and 1 to 10 parts by mass per 100 parts by mass of the polymer of component (A). A range is preferred.

(Epoxy resin curing agent other than ketiminated aminosilane compound)
As the epoxy resin curing agent other than the ketiminated aminosilane compound, one or more of various epoxy resin curing agents can be selected and used. Such epoxy resin curing agents include, for example, amines, acid anhydrides, imidazoles and other curing agents. However, a curing agent with strong activity cures an epoxy resin at room temperature, and it may be difficult to form a one-component composition. is preferred.

(Plasticizer)
Examples of plasticizers include phthalates such as dioctyl phthalate; aliphatic dibasic acid esters such as dioctyl adipate; glycol esters; aliphatic esters; polyethers such as derivatives thereof; hydrocarbon plasticizers; chlorinated paraffins; low-molecular-weight acrylic acid ester polymers; These plasticizers may be used alone or in combination of two or more.

When a plasticizer is used, it can be used in an amount of 10 to 300 parts by mass, preferably 20 to 250 parts by mass, per 100 parts by mass of component (A). If the amount of the plasticizer used is less than 10 parts by mass, the viscosity of the composition may become too high. It is not preferable because there are cases. The sealant composition according to the present invention is a non-plasticized sealant composition that does not contain a low-molecular-weight plasticizer such as a phthalate-based plasticizer having a molecular weight of 800 or less, or a molecular weight of 1,000 or less. It is particularly useful when

(filler)
Fillers include reinforcing fillers such as fumed silica, precipitated silica, silicic anhydride, and carbon black; calcium carbonate, magnesium carbonate, diatomaceous earth, calcined clay, clay, talc, hardened titanium, bentonite, organic bentonite. , ferric oxide, zinc oxide, activated zinc oxide, shirasu balloons and the like; fibrous fillers such as asbestos, glass fibers and filaments.

When producing a hardened product with high strength by adding these fillers, it is preferable to use fillers selected mainly from fumed silica, carbon black, surface-treated fine calcium carbonate, and the like. When producing a cured product with low strength and high elongation, it is preferable to use a filler mainly selected from titanium oxide, calcium carbonate, magnesium carbonate, shirasu balloon, and the like. These fillers may be used alone or in combination of two or more.

When a filler is used, it can be used in the range of 1 to 300 parts by mass, preferably in the range of 5 to 300 parts by mass, and in the range of 5 to 250 parts by mass, based on 100 parts by mass of component (A). It is more preferable to use

(Silanol condensation catalyst)
Examples of silanol condensation catalysts include organic tin compounds such as dibutyltin dilaurate, dibutyltin diacetate, reaction products of dioctyltin oxide and silicate compounds, and reaction products of dibutyltin oxide and phthalate esters: tin carboxylate, carboxylic acid Carboxylic acid metal salts such as bismuth acid and iron carboxylate: aliphatic amines, aromatic amines, amidines such as DBU, guanidines such as diphenylguanidine, amine compounds such as biguanides: carboxylic acids such as versatic acid: Titanium compounds such as diisopropoxytitanium bis(ethylacetoacetate), alkoxy metals such as aluminum compounds: inorganic acids: boron trifluoride complexes such as boron trifluoride ethylamine complex: aluminum monoacetylacetonate bis(ethylacetoacetate) ) and other metal chelate compounds. Among these, organic tin compounds are preferred. The silanol condensation catalyst acts as a curing catalyst for the crosslinkable silicon group-containing organic polymer (A). When a silanol condensation catalyst is used, it can be used in an amount of 0.1 to 20 parts by mass, preferably 0.2 to 10 parts by mass, per 100 parts by mass of component (A).

(Silane coupling agent)
The sealant composition according to the present invention may further contain a silane coupling agent. By blending a silane coupling agent, the sealant composition according to the present invention can improve adhesion to general adherends such as metals, plastics, and glass.

Silane coupling agents include, for example, mercapto group-containing silanes; vinyl type unsaturated group-containing silanes; chlorine atom-containing silanes; isocyanate-containing silanes; alkylsilanes; and the like, but are not limited to these. In addition, modified amino group-containing silanes obtained by modifying amino groups by reacting amino group-containing silanes with epoxy group-containing compounds, isocyanate group-containing compounds, and (meth)acryloyl group-containing compounds containing the above silanes are used. may

The mixing ratio of the silane coupling agent is, for example, preferably 0.2 to 20 parts by mass, more preferably 0.3 to 15 parts by mass, relative to 100 parts by mass of the crosslinkable silicon group-containing organic polymer (A). 0.5 to 10 parts by mass is more preferable. These silane coupling agents may be used alone or in combination of two or more.

(diluent)
The sealant composition according to the present invention preferably further contains a diluent. Physical properties such as viscosity can be adjusted by containing a diluent. Various diluents can be used as the diluent. Examples of diluents include saturated hydrocarbon solvents such as normal paraffin and isoparaffin, α-olefin derivatives such as linearene dimer (trade name of Idemitsu Kosan Co., Ltd.), aromatic hydrocarbon solvents, alcohol solvents, and ester solvents. Various solvents such as solvents, citrate ester solvents such as acetyltriethyl citrate, and ketone solvents can be used.

When considering the safety of the sealant composition to be obtained, it is desirable that the sealant composition has a high flash point and that the sealant composition contains as few volatile substances as possible. Therefore, the flash point of the diluent is preferably 60°C or higher, more preferably 70°C or higher. When two or more diluents are mixed, the flash point of the mixed diluent is preferably 70° C. or higher. However, diluents with a high flash point generally tend to have a low diluent effect on the sealant composition, so it is preferable to use a diluent with a flash point of 250° C. or lower.

When considering both the safety and dilution effect of the sealant composition according to the present invention, the diluent is preferably a saturated hydrocarbon solvent, more preferably normal paraffin or isoparaffin. Normal paraffin and isoparaffin preferably have 10 to 16 carbon atoms.

The blending ratio of the diluent is preferably in the range of 0 to 50 parts by mass, more preferably in the range of 0.1 to 30 parts by mass, per 100 parts by mass of the organic polymer (A). , more preferably in the range of 0.1 to 15 parts by mass. A diluent can be used alone or in combination of two or more.

(dehydrating agent)
Examples of the dehydrating agent include silane compounds such as vinyltrimethoxysilane, tetraethoxysilane and tetramethoxysilane; and ester compounds such as methyl orthoformate and ethyl orthoformate. These dehydrating agents can be used alone or in combination of two or more. Vinyltrimethoxysilane is particularly preferred as the dehydrating agent.

The content of the dehydrating agent is preferably in the range of 0.5 to 20 parts by mass, more preferably in the range of 1 to 15 parts by mass, per 100 parts by mass of component (A). If the content of the dehydrating agent in the sealant composition is too low, the effect obtained by the dehydrating agent may not be sufficient. Moreover, if the content of the dehydrating agent in the sealant composition is too high, the curability of the sealant composition may be lowered.

The cured product of the one-liquid room-temperature moisture-curable sealant composition according to the present invention is excellent in flexibility (low modulus) after heating, and therefore can be used as a sealant, particularly as a sealant for siding boards of buildings and the like. can. The cured product of the one-liquid room temperature moisture-curable sealant composition of the present invention can also be used for frame members such as window frames and door frames, and for sealing the boundary between eaves and wall materials.

FIG. 1 is a diagram showing a ricin-like wall surface, and FIG. 2 is a diagram showing a natural stone-like wall surface without a joint pattern. Moreover, FIG. 3 is a figure which shows an example of the outline|summary of the siding board with a joint pattern.

Unlike the siding material having a ricin-like wall surface shown in FIG. 1, the siding material shown in FIG. there is In a siding board (siding material) having a joint pattern as shown in FIG. 3, a joint structure is formed in the siding material by grooves 15 of the siding material (that is, joint grooves of the siding material). For example, a siding material having a natural stone-like surface texture, as shown in FIG. . Further, as shown in FIG. 3, by forming at least one shape selected from the group consisting of a linear portion 22, a curved portion 24, and a bent portion 26 at the edge of the ridge portion 10, the groove portion of the siding material is formed. The shape of 15 can be changed into various shapes.

The appearance of these surface textures and/or joint structures and the surface of the cured product of the one-component room temperature and humidity curable sealant composition of the present invention are the same as the one-component room temperature and moisture curable sealant composition of the present invention (B ) component, it has a natural stone-like surface texture and an appearance with a sense of unity. When the one-liquid room-temperature moisture-curable sealant composition of the present invention further contains the component (E), it is possible to realize an external appearance with a sense of unity with the natural stone-like surface texture. Therefore, the cured product of the one-liquid room-temperature moisture-curable sealant composition according to the present invention is a siding material having a natural stone-like surface texture without impairing its basic performance (elongation at maximum load, stain resistance, etc.). It will present an appearance with a sense of unity. Then, by filling the joint portion between the wall materials with the one-component room temperature and humidity curable sealant composition of the present invention, the joint portion is filled with the one-component room temperature and moisture curable sealant composition of the present invention. It is possible to obtain a wall with a sense of unity with the surface of the wall material.

(Effect of Embodiment)
Since the one-liquid room-temperature moisture-curable sealant composition according to the present invention contains (B) the inorganic porous expander, the surface of the cured sealant composition resembles the surface texture of natural stone. The surface can have unevenness. The unevenness due to the cured product of the one-liquid room-temperature moisture-curable sealant composition of the present invention differs from the fine granular surface texture such as a sand wall-like pattern in the case of using a sandy paint (ricin paint). It is a surface texture with clear unevenness that is closer to the surface shape of natural stone or natural stone. As a result, according to the one-liquid room-temperature moisture-curable sealant composition according to the present invention, it exhibits a sense of unity with the siding material as a wall material imitating the surface texture of natural stone (surface texture like rock surface). be able to.

In addition, since the one-liquid room-temperature moisture-curable sealant composition according to the present invention can further contain (E) a scaly substance, it has a surface texture that imitates black particles present in natural stones such as sedimentary rocks. and (B) coupled with the presence of the inorganic porous expandable body, a surface texture with more pronounced unevenness can be realized. In particular, when (E) scaly substances having a predetermined diameter are used, at least part of the (E) scaly substances are embedded in the one-liquid room temperature and moisture-curable sealant composition, and other (E) scales are buried. Since the substance rises near the surface of the composition, the surface of the cured product of the one-liquid room-temperature moisture-curable sealant composition can be brought closer to the surface texture of natural stone. As a result, the one-liquid room-temperature moisture-curable sealant composition according to the present invention can exhibit a sense of unity with the surface texture of the siding material as a wall material imitating natural stone.

Hereinafter, the one-liquid room-temperature moisture-curable sealant composition according to the present invention will be described in detail using examples.

(Synthesis Example 1: Crosslinkable Silicon Group-Containing Organic Polymer with a Number Average Molecular Weight of 15,000 or More (Component A1))
62.7% by weight of butyl acrylate, 18.3% by weight of ethyl acrylate, 19.0% by weight of stearyl acrylate, diethyl 2,5-dibromoadipate and ethyl α-bromobutyrate as initiators, and dibromide as a polymerization catalyst. Using monocopper and pentamethyldiethylenetriamine, 1,7-octadiene as a dienizing agent, and methyldimethoxysilane as a silyl agent, atom transfer radical polymerization (ATRP) according to the method of Production Example 1 of JP-A-2010-11644. and having a methyldimethoxysilyl group at both ends and having an average of 1.8 crosslinkable silicon groups per molecule and having a polystyrene-equivalent number average molecular weight of 45,000. (Component A1) was obtained.

(Synthesis Example 2: Crosslinkable Silicon Group-Containing Organic Polymer with a Number Average Molecular Weight of 15,000 or More (Component A2))
Using propylene glycol as an initiator, propylene oxide was reacted in the presence of a zinc hexacyanocobaltate-glyme complex catalyst to obtain hydroxyl-terminated polyoxypropylene having a number average molecular weight of 29,000. A methanol solution of NaOCH ₃ was added to this hydroxyl-terminated polyoxypropylene polymer to distill off the methanol, and then allyl chloride was added to convert the terminal hydroxyl groups to allyl groups. After desalting purification treatment, methyldimethoxysilane, which is a hydrosilyl compound, is reacted in the presence of a platinum catalyst, and has a terminal methyldimethoxysilyl group and an average of 1.8 crosslinkable silicon groups per molecule. An organic polymer (Component A2) having a polyoxypropylene skeleton with a number average molecular weight of 29,000 was obtained. The number average molecular weight is a polystyrene equivalent molecular weight measured by gel permeation chromatography using Tosoh's HLC-8120GPC as a liquid feeding system, Tosoh's TSK-GELH type column, and THF as a solvent.

(Synthesis Example 3: Aliphatic amine compound having a melting point of 30°C or higher)
500 g of heated and dissolved stearylamine (manufactured by Kao Corporation, Farmin 80, amine value 207) was added to a stirring vessel equipped with a heating device and an ester tube, and then 4-methyl-2-pentanone (MW=100. 2) was added in an amount of 203 g. After adding 130 g of toluene to the solution, the mixture was heated and stirred at 110 to 150° C. for 3 hours, and 29.9 g of water was dehydrated through an ester tube. The pressure was then reduced to remove excess 4-methyl-2-pentanone and toluene to obtain a ketiminated compound of stearylamine. This ketiminated compound was a translucent liquid at room temperature.

(sealing material)
50 parts by mass of A1 component of Synthesis Example 1, 50 parts by mass of A2 component of Synthesis Example 2, 20 parts by mass of monofunctional epoxy compound (*1), 100 parts by mass of calcium carbonate (*2), and 100 parts by mass of calcium carbonate (*3) Parts by mass and 70 parts by mass of the acrylic acid ester polymer (*4) were added, and the mixture was mixed and stirred at 110° C. for 2 hours under reduced pressure to dehydrate the compounded material. Furthermore, 3 parts by mass of a silane compound (*5), 10 parts by mass of a saturated hydrocarbon solvent (*6), and 3 parts by mass of an alkoxysilane compound (*7) that reacts with water to produce an amine compound having an alkoxysilyl group. , 3 parts by mass of an organic tin compound (*8) as a silanol condensation catalyst, and 4 parts by mass of Component C (stearylamine ketiminized compound) of Synthesis Example 3 were mixed to prepare a sealing material. The details of each component are as follows. The specific gravity of the sealing material was 1.425.

*1 Di-2-ethylhexyl epoxyhexahydrophthalate (Sanso Cizer E-PS, manufactured by Shin Nippon Rika Co., Ltd.)
*2 Fatty acid-treated ground calcium carbonate (manufactured by Maruo Calcium Co., Ltd., MC Coat S-1)
*3 Fatty acid-treated colloidal calcium carbonate (Kalfain 500, manufactured by Maruo Calcium Co., Ltd.)
*4 Non-functional acrylic polymer, weight average molecular weight 2500 (manufactured by Toagosei Co., Ltd., ARUFON UP-1110)
*5 Vinyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., KBM1003)
* 6 Normal paraffin [main component, n-undecane] (Japan Energy Co., Ltd., Cactus Normal Paraffin N-11)
*7 Compound obtained by converting γ-aminopropyltrimethoxysilane into ketimine with MIBK *8 Dibutyltin diacetylacetonate (manufactured by Nitto Kasei Co., Ltd., Neneostan U-220H)

Next, each component was mixed according to the composition shown in Table 1 to prepare a one-liquid room-temperature moisture-curable sealant composition according to Examples and Comparative Examples.

In Table 1, the compounding amount of each compounding substance is shown in parts by mass. Further, the details of each compounded substance are as follows. The sealing materials in Table 1 are the sealing materials prepared above.

* 9 Inorganic porous expanded body, sieved particle size 0.5 to 1.0 mm (average particle size 0.75 mm, particle specific gravity 0.43), Product Specification For Poraver Germany, trade name: Poraver
*10 Inorganic porous expanded body, sieved particle size 0.3 to 0.5 mm (average particle size 0.4 mm, particle specific gravity 0.52), Product Specification For Poraver Germany, trade name: Poraver
*11 Inorganic porous expanded body, sieved particle size 2-4 mm (average particle size 3 mm, particle specific gravity 0.32), Product Specification For Poraver Germany, trade name: Poraver
*12 Glass beads, sieved particle size 0.4 to 1.0 mm (average particle size 0.7 mm, soda lime glass, spherical, specific gravity 2.5), manufactured by Potters-Ballotini Co., Ltd., trade name : J-30
*13 Colored mica (product name: color flakes, manufactured by Osaka Mica Industry Co., Ltd., average diameter 1 mm, specific gravity 2.85)
*14 Colored mica (product name: color flakes, manufactured by Osaka Mica Industry Co., Ltd., average diameter 5 mm, specific gravity 2.85)

The volume concentration in Table 1 is calculated using the formula "volume concentration (vol%) = 100 x volume of inorganic porous expander/(volume of inorganic porous expander + volume of sealing material)". did. For example, in Reference Example 2 , 2.0 parts by mass of (B) inorganic porous expanded body (average particle size: 0.75 mm) is used, and the grain specific gravity of this inorganic porous expanded body is 0.43. is. Also, 100 parts by mass of the sealing material is used, and the specific gravity of the sealing material is 1.425. In this case, the volume concentration of component B in Reference Example 2 is (2.0 parts by mass/0.43)/(2.0 parts by mass/0.43+100 parts by mass/1.425) x 100 = 6.3 vol% becomes.

(Compatibility test with natural stone-like siding material [without joint pattern])
A 25 mm-thick natural stone-like ceramic siding material without a joint pattern was cut into 200 mm×300 mm squares, and two of them were arranged in parallel on a polyethylene sheet with an interval of 10 mm. A 15 mm square backup material was put into the resulting joint groove of 10 mm width×25 mm depth×300 mm length, and the one-liquid room-temperature moisture-curable sealant composition according to Reference Example 2 was cast. Next, the surface was smoothed and finished using a 20 mm square polyethylene backup material. With respect to each test piece thus produced, it was visually judged whether or not the joints formed by the sealing material were inconspicuous and there was a sense of unity with the natural stone-like ceramic siding material. Judgment criteria are as follows. Further, Reference Examples 3 to 4, Examples 1 to 10 , Reference Example 1, and Comparative Examples 1 to 9 were also tested in the same manner.

"A": The sense of unity is extremely good.
"○": Good sense of unity.
"△": There is a sense of unity.
"▲": There is a sense of incongruity.
"X": There is an obvious sense of incongruity.

(Compatibility test with natural stone-like siding material [with joint pattern])
A natural stone-like ceramic siding material with a 25 mm thick joint pattern is cut into 200 mm × 300 mm squares so that the joint pattern is adjacent to the joint groove of the sealing material, and the two pieces are placed on a polyethylene sheet at an interval of 10 mm. arranged in parallel. A 15 mm-square backup material was placed in the resulting joint of width 10 mm×depth 25 mm×length 300 mm, and the one-liquid room-temperature moisture-curable sealant composition according to Reference Example 2 was placed in each joint. Next, the surface was smoothed and finished using a 20 mm square polyethylene backup material. With respect to each test piece thus produced, it was visually judged whether or not the joints formed by the sealing material were inconspicuous and there was a sense of unity with the natural stone-like ceramic siding material. The criteria are the same as above. Further, Reference Examples 3 to 4, Examples 1 to 10 , Reference Example 1, and Comparative Examples 1 to 9 were also tested in the same manner.

(Physical properties: Maximum load elongation test: Preparation of test samples)
An I-shaped specimen described in 5.1.6 of the standard for sealing materials for siding was produced. That is, a ceramic siding board was cut into a size of 50 mm long and 50 mm wide, and two cut ceramic siding boards were fixed so that they faced each other in the vertical direction with an interval of 10 mm. A polyethylene foam backup material having a length of 50 mm, a width of 10 mm, and a thickness of 6 mm was placed on the lower surface of the gap, and the surface of the ceramic siding board was covered with masking tape. Then, a primer (MP-1000 manufactured by Cemedine Co., Ltd.) is applied to the area that comes into contact with the sealant, and the one-liquid room temperature and moisture-curable sealant composition according to Reference Example 2 is applied to the gap (joint) with an interval of 10 mm at an interval of 8 mm. After filling to the thickness, remove the masking tape, cure for 28 days in an environment of 23 ° C. 50% RH, cure the one-liquid room temperature moisture curing sealant composition, remove the backup material, and test sample was made. Further, test samples were similarly prepared for Reference Examples 3 to 4, Examples 1 to 10 , Reference Example 1, and Comparative Examples 1 to 9.

(Physical properties: Maximum load elongation test: Tensile adhesion measurement method)
Using the test sample according to Reference Example 2 , a tensile adhesion test was conducted in accordance with the standards for sealing materials for siding (test temperature: 23°C). After curing, a tensile adhesion test was carried out at a tensile speed of 50 mm/min under an environment of 23°C. The measurement results were evaluated based on the following criteria. Further, Reference Examples 3 to 4, Examples 1 to 10 , Reference Example 1, and Comparative Examples 1 to 9 were also tested in the same manner.

Compared to Reference Example 1 in Table 1 (a one-liquid room-temperature moisture-curable sealant composition containing no components B, C, and E), the case where the elongation at maximum load is maintained at 75% or more. "○", "Δ" when 50 to 74% was retained, and "×" when 49% or less.

(Stain resistance test)
The antifouling property of the one-liquid room-temperature moisture-curable sealant composition according to Reference Example 2 was tested by the following method. Using a slate plate with a thickness of 5 mm, a joint with a depth of 5 mm, a width of 25 mm, and a length of 150 mm is prepared, and a one-liquid room temperature and humidity curing sealant composition is placed in the joint, and an extra one-liquid room temperature and moisture curing is performed. The mold sealant composition was scraped off with a spatula, the surface was flattened, and cured at 23° C. and 50% relative humidity for 7 days to prepare a specimen. Black silica sand (particle size: 70 to 110 μm) was sprinkled on the surface of the cured specimen, and the specimen was immediately turned upside down and the bottom surface was lightly tapped by hand to remove excess black silica sand. The state of black silica sand (dirt) remaining on the surface was visually observed to determine the anti-fouling property after curing. Further, Reference Examples 3 to 4, Examples 1 to 10 , Reference Example 1, and Comparative Examples 1 to 9 were also tested in the same manner. Judgment criteria are as follows.

"○": Clean state without adhesion of black silica sand.
"△": A state in which black silica sand adheres to some extent.
"X": A large amount of black silica sand adheres to the surface, making it black and dirty.

As can be seen from Table 1, all the examples showed good compatibility with the joint-free siding material. As for the siding material with a joint pattern, although Reference Examples 2 and 3 had a somewhat poor sense of unity, Reference Example 4 and Examples 1 to 10 showed a good sense of unity. Furthermore, with respect to physical properties (elongation at maximum load) and antifouling properties, it was shown that all the examples exhibited good physical properties and antifouling properties. It should be noted that Example 4 differs from Comparative Example 1 in that the content of component B is different and that component C is further included. , the harmony with the siding material was extremely excellent.

Although the embodiments and examples of the present invention have been described above, the embodiments and examples described above do not limit the scope of the invention according to the claims. In addition, not all combinations of features described in the embodiments and examples are essential to the means for solving the problems of the invention, and various It should be noted that variations are possible.

REFERENCE SIGNS LIST 10 Ridge 15 Groove 20 Split pattern 22 Straight portion 24 Curved portion 26 Bent portion

Claims (3)

(A) a crosslinkable silicon group-containing organic polymer;
(B) an inorganic porous expanded body having an average particle size in the range of more than 0.5 mm and 2 mm or less;
(D) an aliphatic amine compound having a melting point of 30° C. or higher ;
(E) a scaly substance having an average diameter in the range of 0.1 mm or more and 4.0 mm or less;
and
(B) containing the inorganic porous expandable material in a volume concentration range of 2 vol% or more and 10 vol% or less with respect to the one-liquid room temperature and moisture curing sealant composition,
A one-component room-temperature and moisture-curable sealant composition containing the (E) scaly substance in a volume concentration range of 0.05 vol% to 0.9 vol% relative to the one-component room-temperature and moisture-curable sealant composition. 2. The one liquid according to claim 1, further comprising (C) an inorganic porous expander having an average particle size of 0.2 mm or more and 0.5 mm or less, which is used in combination with the inorganic porous expander (B). Room-temperature moisture-curable sealant composition. A wall in which the joint portion is filled with the one-liquid room temperature and moisture-curable sealant composition according to claim 1 or 2 .

Images