JP5180938B2 - Elastic putty composition for joint structure of outer wall - Google Patents

Description

The present invention relates to an elastic putty composition, more particularly paint adhesion, paint excellent in coatability, such as non-staining, and non-joint-like portions combined per the external walls of a building, no joint structure of the outer wall It is related with the elastic putty composition used for.

  The reactive silicon group is a hydroxyl group bonded to a silicon atom or a hydrolyzable silicon atom-containing group that can be crosslinked by forming a siloxane bond. A polymer having a reactive silicon group is crosslinked and cured in the presence of moisture. In the polymer, for example, a curable composition using a polymer whose main chain skeleton is oxyalkylene such as polyoxypropylene is used at room temperature. It has the characteristic of becoming a rubber elastic body when cured with a liquid, and is widely used in building sealing materials and industrial sealing materials.

  The sealing material for building is used to fill and fill the gaps (joints) of building materials such as wall materials, and to cure and close the gaps to keep watertight and airtight. One method of finishing the exterior material is to apply a paint to finish it. At that time, the paint is applied to the sealing material together with the exterior material. As a result, in the compatibility between the sealing material and the coating material, the adhesion between the coating material and the sealing material is not always sufficient, and there is a problem in that the coating material is peeled off from the sealing material and appearance defects are generated.

  In addition, when used in such applications, in order to adjust viscosity and physical properties, for example, a low molecular weight plasticizer such as dioctyl phthalate is generally added. If the surface of the product is transferred to the surface of the product, or the paint is overcoated on the surface of the cured product, the plasticizer will be transferred to the surface of the paint, causing the surface to become sticky, causing dirt and contamination, and deteriorating the appearance. was there.

  On the other hand, conventionally, there is a joint structure of the outer wall disclosed in Patent Document 1, for example, as a joint structure of the outer wall in which the part of the outer wall material of the building is a joint-like shape. In the conventional jointless structure, an elastic putty composition is spread on the surface side of the attached portion of the outer wall material, a fiber net having a mesh is disposed thereon, and the conventional elastic putty is disposed thereon. It is coated with a composition and further coated with an elastic coating material.

  However, in the conventional joint-free structure, the elastic putty composition is insufficient in performance, and joint warping occurs greatly. Since the stringing during construction is large, two joint treatments are required. In addition, as for paintability, paint adhesion due to insufficient adhesion and other cases where plasticizers such as phthalates are added may cause problems in design due to paint contamination, resulting in inconvenience. was there.

Utility Model Registration No. 2592501 Japanese Patent Publication No. 1-58219 Japanese Patent No. 3062625 JP-A-8-337713 JP 2003-138151 A Japanese Patent Laid-Open No. 11-12480 JP-A-52-73998 JP 55-9669 A JP 59-122541 A Japanese Unexamined Patent Publication No. 60-6747 JP-A-61-233043 Japanese Unexamined Patent Publication No. Sho 63-112642 JP-A-3-79627 JP-A-4-283259 JP-A-5-70531 JP-A-5-287186 Japanese Patent Laid-Open No. 11-80571 Japanese Patent Laid-Open No. 11-116763 JP-A-11-130931 Japanese Patent Laid-Open No. 2001-40037 Japanese Patent No. 3313360 JP 2003-155469 A

  The present invention has been made in view of the above-mentioned problems of the prior art, and is an elastic putty composition that is excellent in paint adhesion and storage stability, excellent in paintability that eliminates the problem of paint contamination, and excellent in workability. The purpose is to provide goods.

In order to solve the above-mentioned problems, the elastic putty composition for an outer wall joint structure excellent in paint adhesion of the present invention has a joint structure of the outer wall material of the building, and has a joint structure of the outer wall. elastic is a putty composition, (a) on average weight average molecular weight of 2,000 to 50,000 of the crosslinkable silyl group having 0.5 or more 1.5 or less crosslinkable silyl groups in the molecule used Containing organic polymer, (B) curing catalyst, (D) surface-treated calcium carbonate having an average primary particle size of 0.005 to 0.03 μm , and (E) a light weight having a true specific gravity of 0.1 to 1 Containing at least one powder , and the component (A) is at least one compound selected from the group consisting of a crosslinkable silyl group-containing polyoxyalkylene polymer and a crosslinkable silyl group-containing polyisobutylene polymer. , 100 parts by mass of the component (A) On the other hand, 0.1-30 mass parts of said component (B), 1-300 mass parts of said components (D) are mix | blended, and structural viscosity index is 6 or more, It is characterized by the above-mentioned. The average primary particle diameter is measured with a scanning electron microscope.

  The elastic putty composition of the present invention further contains (C) an organic polymer having a weight average molecular weight of 2,000 to 50,000, which does not contain a crosslinkable silyl group or contains less than 0.5 crosslinkable silyl groups. It is preferable to contain.

  The component (A) preferably has 0.7 to 1.5 crosslinkable silyl groups on average in the molecule, and 1.0 to 1.5 on average in the molecule. It is more preferable to have a crosslinkable silyl group.

  The component (C) does not contain a crosslinkable silyl group or contains less than 0.5 crosslinkable silyl groups and / or does not contain a crosslinkable silyl group or less than 0.5 A (meth) acrylic polymer containing a crosslinkable silyl group is preferred.

In the present invention, the SVI value means a numerical value calculated by the following method. First, in accordance with 6.3 viscosity of JIS K 6833, using a B-type viscometer (manufactured by Toki Sangyo, BS rotor No. 7), the viscosity after 120 seconds at 1 rotation and 10 rotations Measure (measurement temperature 23 ° C.). From the measured viscosity, an SVI value is calculated by the following formula (1).
S = η ₁ / η ₂ (1)
In the formula (1), S: SVI value, η ₁ : viscosity at 1 rotation, η ₂ : viscosity at 10 rotations.

  In addition, it is preferable to add (E) a lightweight powder having a true specific gravity of 0.1 to 1 to the elastic putty composition of the present invention.

According to the elastic putty composition for jointless structure of the outer wall of the present invention, the SVI value is high, and it has good paint adhesion and paint non-contamination, and the joint can be smoothed without dents at one time. It is possible to provide an elastic putty composition for the joint structure of the outer wall that is extremely excellent in workability.

  Embodiments of the present invention will be described below, but these embodiments are exemplarily shown, and it goes without saying that various modifications can be made without departing from the technical idea of the present invention.

  This curable composition contains (A) a crosslinkable silyl group having a weight average molecular weight of 2,000 to 50,000 having an average of 0.5 to 1.5 crosslinkable silyl groups in the molecule. An organic polymer and (B) a curing catalyst are contained.

  In the present curable composition, the crosslinkable silyl group of the component (A) crosslinkable silyl group-containing organic polymer has a hydroxyl group or a hydrolyzable group bonded to a silicon atom, and is crosslinked by forming a siloxane bond. Although a silicon-containing group that can be used is used, those represented by the following general formula (1) that are easy to crosslink and easy to produce are preferable. The number of crosslinkable silyl groups in the molecule is 0.5 or more on average, preferably 0.7 or more, more preferably 1.0 or more, and 1.5 or less, more preferably 1.4. Includes:

(In Formula (1), R is a C1-C20 substituted or unsubstituted monovalent organic group, a C1-C20 alkyl group, a C6-C20 aryl group, or C7-C7 An aralkyl group of 20 is preferable, and a methyl group is most preferable, and when a plurality of R are present, they may be the same or different, X is a hydroxyl group or a hydrolyzable group, and is a halogen atom, a hydrogen atom, A group selected from a hydroxyl group, an alkoxy group, an acyloxy group, a ketoximate group, an amide group, an acid amide group, a mercapto group, an alkenyloxy group and an aminooxy group is preferable, an alkoxy group is more preferable, and a methoxy group is most preferable. When there are a plurality of them, they may be the same or different. A is 0, 1 or 2, and 1 is most preferred.)

  Specifically, as the component (A), the average chain in the molecule contains 0.5 to 1.5 crosslinkable silyl groups, and each main chain may contain an organosiloxane. , Polyoxyalkylene polymers, vinyl-modified polyoxyalkylene polymers, vinyl polymers, polyester polymers, (meth) acrylic acid ester polymers, copolymers and mixtures thereof. In particular, from the viewpoint of physical properties such as tensile adhesion after curing and modulus, 0.5 to 1.5, preferably 0.7 to 1.5, more preferably 1. A polyoxyalkylene polymer containing 0 to 1.5 crosslinkable silyl groups, each main chain optionally containing an organosiloxane, a (meth) acryl-modified polyoxyalkylene polymer, a poly An isobutylene polymer, a (meth) acrylic polymer, a copolymer or a mixture thereof is preferable, and a polyoxypropylene polymer and / or (meta) each containing a main chain may contain an organosiloxane. It is more preferable that it is an acrylic-modified polyoxypropylene polymer.

  The production method of the component (A) is not particularly limited. For example, in the production methods disclosed in Patent Documents 2 to 22, the number of crosslinkable silyl groups present in one molecule is 0.5 to It can manufacture by making it be 1.5 pieces. Moreover, as a component (A), it obtained by mixing 2 or more types of organic polymers from which the number of crosslinkable silyl groups differs, and on average 0.5 or more and 1.5 or less crosslinkability in 1 molecule is obtained. An organic polymer having a silyl group can also be used. Specifically as a manufacturing method of a component (A), the manufacturing method etc. which were used in the synthesis examples 1-4, 7-9, 11-16, and 19-21 mentioned later can be mentioned.

  In the present curable composition, the weight average molecular weight of the component (A) is 2,000 or more and 50,000 or less, more preferably 2,000 or more and 40,000 or less, and particularly 2,000 or more and 30,000 or less. A narrow molecular weight distribution is easy to handle because of its low viscosity before curing, and physical properties such as strength, elongation, and modulus after curing are suitable. The said component (A) may be used only by 1 type, and may be used together 2 or more types.

  In the present curable composition, the component (B) curing catalyst is not particularly limited as long as it exhibits the effect of the curing catalyst on the component (A), and examples thereof include organometallic compounds and amines. In particular, it is preferable to use a silanol condensation catalyst. Examples of the silanol condensation catalyst include stannous octoate, dibutyltin dioctoate, dibutyltin dilaurate, dibutyltin maleate, dibutyltin diacetate, dibutyltin diacetylacetonate, dibutyltin oxide, dibutyltin bistriethoxysilicate, dibutyltin distearate. Organotin compounds such as dioctyltin dilaurate, dioctyltin diversate, tin octylate and tin naphthenate; reactants of dibutyltin oxide and phthalate; titanates such as tetrabutyl titanate and tetrapropyl titanate; aluminum Organoaluminum compounds such as trisacetylacetonate, aluminum trisethylacetoacetate, diisopropoxyaluminum ethylacetoacetate; Chelate compounds such as Konium tetraacetylacetonate and Titanium tetraacetylacetonate; Leads of organic acids such as lead octylate and lead naphthenate; Bismuths of organic acids such as bismuth octylate, bismuth neodecanoate and bismuth rosinate; Silanol condensation Examples of the catalyst include other known acidic catalysts and basic catalysts.

  The blending ratio of the component (B) is 0.1 to 30 parts by weight, particularly 0.5 to 20 parts by weight with respect to 100 parts by weight of the component (A) from the viewpoints of crosslinking speed and physical properties of the cured product. Is preferred. These curing catalysts may be used alone or in combination of two or more.

  It is preferable to add an organic polymer having a component (C) weight average molecular weight of 2,000 or more and 50,000 or less to the present curable composition in order to impart workability and flexibility of the cured product. Although it does not specifically limit as said component (C), It is suitable to use a polyoxyalkylene type polymer, a (meth) acrylic-type polymer, these copolymers, a mixture, etc. The crosslinkable silyl group may or may not be contained, and is not particularly limited. However, when it is contained, the number of crosslinkable silyl groups is preferably 0.05 or more and less than 0.5.

  The polyoxyalkylene polymer containing no crosslinkable silyl group used as component (C) is a hydroxy compound having at least one hydroxyl group in the presence of a catalyst such as an alkali metal catalyst, a double metal cyanide complex catalyst, or a metal porphyrin catalyst. It can be produced by reacting an initiator such as a monoepoxide such as alkylene oxide.

  Specific examples of the initiator include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, neopentyl glycol, 1,4-butanediol, 1,6-hexanediol, glycerin, trimethylolpropane, pentaerythritol, diglycerin. Sucrose and polyols having a lower molecular weight than the target product obtained by reacting these with alkylene oxide. These may be used alone or in combination of two or more. Also, unsaturated group-containing monohydroxy compounds such as allyl alcohol can be used.

  Particularly preferred polyoxyalkylene polymers not containing a crosslinkable silyl group are polyoxypropylene diol, polyoxyalkylene triol and polyoxytetraol.

  In addition, a polyoxyalkylene polymer obtained by converting a hydroxyl group of the polyoxyalkylene polymer into another group can also be used. As an example of a polymer in which a hydroxyl group is converted to another group in this way, a polyoxyalkylene polymer having a terminal hydroxyl group such as oxypropylene glycol has a bond such as a urethane bond, an ester bond, a urea bond, or a carbonate bond. Through, substitution of alkyl groups such as methyl group, ethyl group, propyl group, chloromethyl group, benzyl group and glycidyl group, aryl groups such as phenyl group, toluyl group and chlorophenyl group, and alkenyl groups such as vinyl group and allyl group Or the oxyalkylene polymer blocked with the unsubstituted hydrocarbon group, Preferably the C1-C40 hydrocarbon group is mentioned.

  As the (meth) acrylic polymer not containing a crosslinkable silyl group used as the component (C), conventionally known ones can be widely used. (Meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylonitrile Although it will not specifically limit if it is an acrylic (co) polymer which polymerized 1 or more types chosen from acrylic monomers, such as (meth) acrylamide, As a preferable example, (meth) acrylic acid ester single quantity An acrylic acid ester having a carbon number of 1 to 20 in the ester portion is mentioned.

  In addition to the above acrylic monomer, the (meth) acrylic polymer can be copolymerized with a monomer copolymerizable therewith. Examples of the copolymerizable monomer include vinyl monomers such as fluoroolefins, α-olefins, vinyl esters and vinyl ethers.

  A conventionally well-known thing can be widely used as a polyoxyalkylene type polymer and (meth) acrylic-type polymer containing a crosslinkable silyl group used as a component (C). The production method of the component (C) is not particularly limited. For example, in the production methods disclosed in Patent Documents 2 to 22, a predetermined number of crosslinkable silyl groups are contained in one molecule. Can be manufactured.

  Although the mixture ratio of a component (C) is not specifically limited, It is preferable to use 1-400 mass parts with respect to 100 mass parts of components (A), and it is more preferable to use 5-200 mass parts. The said component (C) may be used only by 1 type, and may be used together 2 or more types.

  In addition to the above-described components, the present curable composition may include an adhesion-imparting agent, a physical property adjusting agent, a filler, a plasticizer, a thixotropic agent, a dehydrating agent (storage stability improving agent), and a tackifier. , Anti-sagging agents, UV absorbers, antioxidants, flame retardants, colorants, radical polymerization initiators, and various solvents such as toluene and alcohol, and other compatible polymers You may blend.

  As the other compatible polymer, various polyethers are particularly preferable, and in particular, polyethers having a silicon functional group are exemplified.

Examples of the adhesion imparting agent include various silane coupling agents such as aminosilanes such as aminoethylaminopropyltrimethoxysilane, aminoethylaminopropylmethyldimethoxysilane, aminoethylaminopropylmethylmethoxysilane, and γ-glycidoxypropyltrimethyl. Examples include epoxy silanes such as methoxysilane, acrylic silanes such as γ-methacryloxypropyltrimethoxysilane, mercaptosilanes such as γ-mercaptopropyltrimethoxysilane, and isocyanate silanes such as γ-isocyanatopropyltrimethoxysilane. It is done. The said adhesion grant agent may be used independently and may be used together 2 or more types.

  The physical property modifier is added for the purpose of improving the tensile physical properties. Examples of the physical property modifier include a silicon compound having one silanol group in one molecule, such as triphenylsilanol, trialkylsilanol, dialkylphenylsilanol, diphenylalkylsilanol, and the like. Various silane coupling agents such as silicon compounds that can be decomposed to produce a compound having one silanol group in one molecule, such as triphenylmethoxysilane, trialkylmethoxysilane, dialkylphenylmethoxysilane, diphenylalkylmethoxy Silane, triphenylethoxysilane, trialkylethoxysilane, etc. are mentioned. The said physical property modifier may be used independently and may be used together 2 or more types.

  Examples of the filler include calcium carbonate, magnesium carbonate, diatomaceous earth hydrous silicic acid, hydrous silicic acid, anhydrous silicic acid, calcium silicate, silica, titanium dioxide, clay, talc, carbon black, slate powder, mica, kaolin, and zeolite. Of these, calcium carbonate is preferable, and fatty acid-treated calcium carbonate is more preferable. In addition, glass beads, silica beads, alumina beads, carbon beads, styrene beads, phenol beads, acrylic beads, porous silica, shirasu balloons, glass balloons, silica balloons, saran balloons, acrylic balloons, etc. can be used. Among them, an acrylic balloon is more preferable from the viewpoint that the decrease in elongation after curing of the composition is small. The fillers may be used alone or in combination of two or more.

  The plasticizer is added for the purpose of enhancing the elongation physical properties after curing or enabling low modulus. Examples of the plasticizer include phosphate esters such as tributyl phosphate and tricresyl phosphate; phthalate esters such as dioctyl phthalate (DOP), dibutyl phthalate and butyl benzyl phthalate; fatty acid monobases such as glycerin monooleate Acid esters; fatty acid dibasic acid esters such as dibutyl adipate and dioctyl adipate; glycol esters such as polypropylene glycol; aliphatic esters; epoxy plasticizers; polyester plasticizers; polyethers; Is mentioned. The plasticizers may be used alone or in combination of two or more.

  Examples of the thixotropic agent include inorganic thixotropic agents such as colloidal silica and asbestos powder, organic thixotropic agents such as organic bentonite, modified polyester polyol, and fatty acid amide, hydrogenated castor oil derivative, fatty acid amide wax, and aluminum stearylate. And barium stearylate. The thixotropic agent may be used alone or in combination of two or more.

  The dehydrating agent is added for the purpose of removing moisture during storage. Examples of the dehydrating agent include silane compounds such as vinyltrimethoxysilane, dimetholdimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, and methyltriethoxysilane.

  The antioxidant is used to prevent oxidation of the cured sealant and improve weather resistance, and examples thereof include hindered amine-based and hindered phenol-based antioxidants. Examples of the hindered amine antioxidant include N, N ′, N ″, N ″ ′-tetrakis- (4,6-bis (butyl- (N-methyl-2,2,6,6-tetramethylpiperidine- 4-yl) amino) -triazin-2-yl) -4,7-diazadecane-1,10-diamine, dibutylamine 1,3,5-triazine N, N'-bis- (2,2,6 , 6-tetramethyl-4-piperidyl-1,6-hexamethylenediamine · N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine polycondensate, poly [{6- (1, 1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2 , 2,6,6-tetramethyl-4- Peridyl) imino}], a polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, [bis (2,2,6,6-tetramethyl-decanedioic acid) 1 (octyloxy) -4-piperidyl) ester, reaction product of 1,1-dimethylethyl hydroperoxide and octane (70%)]-polypropylene (30%), bis (1,2,2,6,6- Pentamethyl-4-piperidyl) [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl] methyl] butyl malonate, methyl 1,2,2,6,6-pentamethyl-4-piperidyl seba Kate, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate 1- [2- [3- (3,5-Di-tert-butyl-4-hydroxyphenyl) propionyloxy] ethyl] -4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) ) Propionyloxy] -2,2,6,6-tetramethylpiperidine, 4-benzoyloxy-2,2,6,6-tetramethylpiperidine, 8-acetyl-3-dodecyl-7,7,9,9- Examples include, but are not limited to, tetramethyl-1,3,8-triazaspiro [4.5] decane-2,4-dione, etc. Examples of hindered phenol antioxidants include pentane. Erythritol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], thiodiethylene-bis [3- (3,5-di-ter t-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4-hydroxyphenylpropioamide), benzenepropanoic acid 3,5-bis (1,1-dimethylethyl) -4-hydroxy C7-C9 side chain alkyl ester, 2,4 -Dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl] methyl] phosphonate, 3,3 ', 3 ", 5 5 ', 5 "-hexane-tert-butyl-4-a, a', a"-(mesitylene-2,4,6-tolyl) tri-p-cresol, calci Mudiethylbis [[[3,5-bis- (1,1-dimethylethyl) -4-hydroxyphenyl] methyl] phosphonate], 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) Bis [3- (5-tert-butyl-4-hydroxy-m-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3 , 5-Tris (3,5-di-tert-butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6- (1H, 3H, 5H) -trione, N-phenylbenzenamine Product of 2,4,4-trimethylpentene with 2,6-di-tert-butyl-4- (4,6-bis (octylthio) -1,3,5 Triazin-2-ylamino) phenol and the like, but not limited thereto. The antioxidants may be used alone or in combination of two or more.

  The ultraviolet absorber is used to improve the weather resistance by preventing photodegradation of the cured sealant, for example, an ultraviolet absorber such as benzotriazole, triazine, benzophenone, or benzoate. Etc. Examples of the ultraviolet absorber include 2,4-di-tert-butyl-6- (5-chlorobenzotriazol-2-yl) phenol and 2- (2H-benzotriazol-2-yl) -4,6- Di-tert-pentylphenol, 2- (2H-benzotriazol-2-yl) -4- (1,1,3,3-tetramethylbutyl) phenol, methyl 3- (3- (2H-benzotriazole-2) -Yl) -5-tert-butyl-4-hydroxyphenyl) propionate / polyethylene glycol 300 reaction product, 2- (2H-benzotriazol-2-yl) -6- (linear and side chain dodecyl) -4 -Benzotriazole ultraviolet absorbers such as methylphenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(he Sil) oxy] -phenol and the like triazine ultraviolet absorbers, benzophenone ultraviolet absorbers such as octabenzone, 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate, etc. Examples include, but are not limited to, benzoate ultraviolet absorbers. The said ultraviolet absorber may be used independently or may use 2 or more types together.

  The elastic putty composition of the present invention is composed of the present curable composition as a main component, is a non-Newtonian substance, and has a structural viscosity index, that is, an SVI value of 6 or more. That is, the elastic putty composition of the present invention has a weight average molecular weight of 2,000 to 50,000 having an average of 0.5 to 1.5 crosslinkable silyl groups in the component (A) molecule. It contains a crosslinkable silyl group-containing organic polymer and a component (B) curing catalyst, and has an SVI value of 6 or more.

  In the elastic putty composition of the present invention, as the component (A), those exemplified in the description of the curable composition can be used in the same manner. However, in the elastic putty composition of the present invention, the component (A) ) Has a weight average molecular weight of 2,000 or more and 50,000 or less, and particularly those having a narrow molecular weight distribution of 2,000 or more and 30,000 or less are easy to handle because of low viscosity before curing, strength after curing, Properties such as elongation and modulus are preferred. The component (A) may be used alone or in combination of two or more.

  In the elastic putty composition of the present invention, as the component (B), those exemplified in the description of the present curable composition can be similarly used. Moreover, what is necessary is just to perform the mixture ratio of a component (B) similarly to the above-mentioned this curable composition.

  In the elastic putty composition of the present invention, the method for improving the SVI value is not particularly limited, but it is preferable to improve the SVI value by adding component (D) surface-treated calcium carbonate. As said component (D), the average primary particle diameter investigated with the scanning electron microscope is 0.001-0.1 micrometer, and 0.005-0.075 micrometer is preferable.

  As the surface treatment agent for calcium carbonate, an organic surface treatment agent is preferably used. Specific examples of organic surface treating agents include saturated fatty acids such as caprylic acid, lauric acid, myristic acid, palmitic acid, stearic acid, and alginic acid, oleic acid, elaidic acid, linoleic acid, and ricinoleic acid. Unsaturated fatty acids, alicyclic carboxylic acids typified by naphthenic acid, abietic acid, pimaric acid, parastrinic acid, resin acids typified by neoabietic acid and their disproportionated rosin, hydrogenated rosin Rosin, trimer rosin, modified rosin, polymerized rosin, sulfonic acids represented by alkylbenzene sulfonic acid and their alkali metal salts, alkaline earth metal salts, ammonium salts, amine salts, and the following anions , Cationic and nonionic surfactants. These surface treatment agents may be used alone or in combination of two or more.

Examples of the anionic surfactant include alkyl ether sulfuric acid exemplified by polyoxyethylene alkyl ether sulfuric acid, alkyl ether phosphoric acid exemplified by polyoxyethylene alkyl ether phosphoric acid, polyoxyethylene alkyl phenyl ether sulfuric acid and the like. Alkyl aryl ether sulfuric acid, polyoxyethylene alkyl phenyl ether phosphoric acid exemplified by alkyl aryl ether phosphoric acid, polyoxyalkyl sulfuric acid ester exemplified by alkyl sulfuric acid ester, polyoxyalkyl phosphoric acid ester exemplified by alkyl phosphoric acid ester Alkylaryl sulfates exemplified by polyoxyalkylphenyl sulfates, alkylaryl phosphates exemplified by polyoxyalkylphenyl phosphates, fatty acid alkyls Illustrated in alkylamide sulfates exemplified by roll amide sulfates, alkyl sulfonates exemplified by polyoxyethylene alkyl sulfonates, alkyl benzene sulfonates, alkyl naphthalene sulfonates, sulfosuccinates, dialkyl sulfosuccinates, etc. Sulfosuccinic acid esters, α-olefin sulfonic acids, N-acyl sulfonic acids and their alkali metals, alkaline earth metal salts, amine salts, ammonium salts and other anionic surfactants, α, β unsaturated monocarboxylic acids, α, β unsaturated dicarboxylic acid, methacrylic acid alkyl ester, (meth) acryl ether having alkoxy group, (meth) acrylate having cyclohexyl group, α, β monoethylenically unsaturated hydroxy ester, polyalkylene glycol Copolymers composed of monomeric (meth) acrylates, vinyl esters, vinyl aromatics, unsaturated nitriles, unsaturated dicarboxylic esters, vinyl ethers, conjugated dienes, chain olefins, cyclic olefins, sulfo group-containing monomers, etc. Examples thereof include anionic polymer dispersants and their partially or completely neutralized salts with alkali metals, alkaline earth metals, ammonium and the like.

  Examples of cationic surfactants include aliphatic amine salts such as stearylamine acetate and stearylamine hydrochloride, aliphatic quaternary ammonium salts such as lauryltrimethylammonium chloride and stearyltrimethylammonium chloride, and alkylbenzyldimethylammonium chloride. Cationic surfactants such as aromatic quaternary ammonium salts, heterocyclic quaternary ammonium compounds, amino groups (primary amine groups), imino groups (secondary amine groups), tertiary amine groups, quaternary ammonium groups, Cationic polymer dispersants having polar groups such as hydrazino groups, monomers copolymerizable with monomers having these polar groups, such as α, β unsaturated monocarboxylic acids, α, β unsaturated dicarboxylic acids Acid, methacrylic acid alkyl ester, (meth) aldehyde having alkoxy group Ryl ether, (meth) acrylate having cyclohexyl group, α, β monoethylenically unsaturated hydroxy ester, polyalkylene glycol mono (meth) acrylate, vinyl ester, vinyl aromatic, unsaturated nitrile, unsaturated dicarboxylic acid ester, vinyl ether , Copolymers with monomers such as conjugated dienes, chained olefins, cyclic olefins, sulfo group-containing monomers, and salts partially or completely neutralized by alkali metals, alkaline earth metals, ammonium, etc. Is given as an example.

  Furthermore, examples of nonionic surfactants include betaine, aminocarboxylic acid, and imidazoline derivatives exemplified by polyoxyethylene and derivatives thereof, carboxybetaine, sulfobetaine and the like.

  Although the mixture ratio of a component (D) is not specifically limited, It is preferable to use 1-300 mass parts with respect to 100 mass parts of components (A), and it is more preferable to use 5-200 mass parts. These surface-treated calcium carbonates (D) may be used alone or in combination of two or more.

  It is preferable to further add (C) an organic polymer having a weight average molecular weight of 2,000 to 50,000 to the elastic putty composition of the present invention. As said component (C), what was illustrated in description of this curable composition can be used similarly. Moreover, what is necessary is just to perform the mixture ratio of a component (C) similarly to the above-mentioned this curable composition.

  It is preferable to further add (E) a lightweight powder having a true specific gravity of 0.1 to 1 to the elastic putty composition of the present invention. As the component (E), specifically, glass beads, silica beads, alumina beads, carbon beads, styrene beads, phenol beads, acrylic beads, porous silica, shirasu balloons, glass balloons, silica balloons, saran balloons, An acrylic balloon etc. are mentioned.

  The blending ratio of the component (E) is not particularly limited, but it is preferably 0.5 to 100 parts by mass, more preferably 1 to 50 parts by mass with respect to 100 parts by mass of the component (A). preferable. The said component (E) may be used only by 1 type, and may be used together 2 or more types.

  For the elastic putty composition of the present invention, in addition to the above-described components, an adhesion-imparting agent, a physical property modifier, a filler, a plasticizer, a thixotropic agent, a dehydrating agent (a storage stability improving agent) ), Tackifiers, sag-preventing agents, ultraviolet absorbers, antioxidants, flame retardants, colorants, radical polymerization initiators, and various solvents such as toluene and alcohol may be blended and compatible. Other polymers may be blended. As the composition other than the above components, those described as the composition of the present curable composition can be similarly used.

  The present invention will be described more specifically with reference to the following examples. However, it is needless to say that these examples are shown by way of illustration and should not be construed in a limited manner.

  Hereinafter, an example of the present curable composition will be described.

(Synthesis Example 1) Synthesis of Polymer 1 Hydroxyl value-converted molecular weight of 17,000 obtained by reacting propylene oxide in the presence of zinc hexacyanocobaltate-glyme complex catalyst using propylene glycol as an initiator, and Mw / Mn = A polyoxypropylene of 1.3 was obtained. The reaction product is reacted with methyldimethoxysilane, which is a hydrosilyl compound, in the presence of a platinum catalyst, and has a methyldimethoxysilyl group at the terminal and an average of 1.2 crosslinkable silyl groups in one molecule. A polymer 1 having a molecular weight (hereinafter referred to as Mw) of 17,000 was obtained.

(Synthesis Example 2) Synthesis of Polymer 2 In the same manner as in Synthesis Example 1, Mw of 17,000 having a methyldimethoxysilyl group at the end and an average of 1.5 crosslinkable silyl groups in one molecule A polymer 2 was obtained.

(Synthesis Example 3) Synthesis of Polymer 3 In the same manner as in Synthesis Example 1, Mw of 17,000 having a methyldimethoxysilyl group at the end and an average of 1.0 crosslinkable silyl group in one molecule A polymer 3 was obtained.

(Synthesis Example 4) Synthesis of Polymer 4 In the same manner as in Synthesis Example 1, Mw of 17,000 having a methyldimethoxysilyl group at the end and an average of 0.8 crosslinkable silyl groups in one molecule A polymer 4 was obtained.

(Synthesis Example 5) Synthesis of Polymer 5 In the same manner as in Synthesis Example 1, Mw of 17,000 having a methyldimethoxysilyl group at the terminal and having 1.7 crosslinkable silyl groups per molecule on average. A polymer 5 was obtained.

(Synthesis Example 6) Synthesis of Polymer 6 In the same manner as in Synthesis Example 1, Mw of 17,000 having a methyldimethoxysilyl group at the end and an average of 0.3 crosslinkable silyl groups in one molecule A polymer 6 was obtained.

(Synthesis Example 7) Synthesis of Polymer 7 The polymer 4 obtained in Synthesis Example 4 and the polymer 5 obtained in Synthesis Example 5 were blended at a solid content ratio of 50/50 and averaged 1 per molecule. A polymer 7 having an Mw of 17,000 having 25 crosslinkable silyl groups was obtained.

(Synthesis example 8) The synthesis | combination of the polymer 8 The temperature was maintained at 200 degreeC in the pressure-type stirring tank reactor of the capacity | capacitance of 1000 ml provided with the electric heater. Next, while maintaining the reactor pressure constant, 84 parts of butyl acrylate (hereinafter referred to as BA) as the acrylate monomer and γ-methacryloxypropyltrimethoxy as the hydrolyzable silyl group-containing monomer A monomer mixture comprising 16 parts of silane (hereinafter referred to as MSi) and 1 part of ditertiary butyl peroxide as a polymerization initiator is supplied from a raw material tank at a constant supply rate (80 g / min, residence time: 12 minutes). Continuous supply to the reactor was started, and a reaction solution corresponding to the supply amount of the monomer mixture was continuously extracted from the outlet.

  Immediately after the start of the reaction, the reaction temperature was once lowered and then a temperature increase due to the heat of polymerization was observed, but the reaction temperature was maintained at 250 to 251 ° C. by controlling the heater. The time when the temperature became stable from the start of the supply of the monomer mixture was taken as the collection start point of the reaction solution, and the reaction was continued for 25 minutes. As a result, 2 kg of the monomer mixture was supplied and 1.9 kg of the reaction solution was added. It was collected. Thereafter, the reaction solution was introduced into a thin film evaporator to separate volatile components such as unreacted monomers to obtain a concentrated solution. From the gas chromatographic analysis, no unreacted monomer was present in the concentrate. Tetrahydrofuran was used as the solvent, and the polystyrene-equivalent number average molecular weight (hereinafter referred to as Mn) measured by gel permeation chromatography (hereinafter referred to as GPC) was 2000 and Mw was 4800. The number of crosslinkable silyl groups per molecule of the polymer was 1.29. On average, a polymer 8 having 1.29 crosslinkable silyl groups in one molecule was obtained.

(Synthesis Example 9) Synthesis of Polymer 9 In the same manner as in Synthesis Example 8, reaction temperature using 75 parts of BA, 13 parts of ethyl acrylate (hereinafter referred to as EA) and 12 parts of MSi was used. Polymerization was carried out at 260 ° C. to obtain a polymer 9 having 0.72 crosslinkable silyl groups per molecule on average. Moreover, the obtained polymer was Mn1500 and Mw3500.

(Synthesis Example 10) Synthesis of Polymer 10 Using the same method as Synthesis Example 8, using 67 parts of BA, 30 parts of 2-ethylhexyl acrylate (hereinafter referred to as HA), and 3 parts of MSi. Polymerization was carried out at a reaction temperature of 240 ° C. to obtain a polymer 10 having 0.22 crosslinkable silyl groups in one molecule on average. Moreover, the obtained polymer was Mn1800 and Mw4400.

(Synthesis Example 11) Synthesis of Polymer 11 220 g of UMB-2005 (trade name, Mw2200, manufactured by Soken Chemical Co., Ltd.) and KBM9007 (trade name, γ-isocyanatopropyltrimethoxysilane, manufactured by Shin-Etsu Chemical Co., Ltd.) 30 .4 g was reacted under stirring at 50 ° C. for 5 hours in a nitrogen atmosphere to obtain a polymer P1 having 1.5 crosslinkable silyl groups in one molecule on average. Moreover, the obtained polymer P1 was Mw2500. The obtained polymer P1 and the polymer 1 obtained in Synthesis Example 1 were blended at a solid content ratio of 20/80, and on average, a polymer 11 having 1.25 crosslinkable silyl groups in one molecule was obtained. Obtained.

(Synthesis Example 12) Synthesis of Polymer 12 The polymer 5 obtained in Synthesis Example 5 and the polymer 9 obtained in Synthesis Example 9 were blended at a solid content ratio of 50/50, and averaged 1 per molecule. The polymer 12 which has 21 crosslinkable silyl groups was obtained.

(Reference Example 1)
As shown in Table 1, as a component (A) crosslinkable silyl group-containing organic polymer, a crosslinkable silyl group having an average of 1.2 crosslinkable silyl groups in one molecule obtained in Synthesis Example 1 Containing polyoxyalkylene polymer 1, as a component (C) organic polymer, a hydroxyl group-containing polyoxypropylene polymer, calcium carbonate and a dehydrating agent were charged in predetermined amounts, respectively, and heating and decompression mixing and stirring were performed at 110 ° C. for 2 hours, The blended material was dehydrated. Furthermore, dibutyltin diacetylacetonate and a silane coupling agent were added in predetermined amounts as the component (B) curing catalyst, and the mixture was stirred and blended to prepare a curable composition.

(Reference Example 2)
As shown in Table 1, as the component (C), a curable composition was prepared by the same method as in Reference Example 1 except that an acrylic polymer was blended instead of the hydroxyl group-containing polyoxypropylene polymer.

(Reference Example 3)
As shown in Table 1, as a component (C), instead of a hydroxyl group-containing polyoxypropylene polymer, a crosslink having 0.3 crosslinkable silyl groups on average in one molecule obtained in Synthesis Example 6 A curable composition was prepared in the same manner as in Reference Example 1 except that the functional silyl group-containing polyoxyalkylene polymer 6 was blended.

(Reference Example 4)
As shown in Table 1, as component (C), instead of a hydroxyl group-containing polyoxypropylene polymer, a crosslink having 0.22 crosslinkable silyl groups on average in one molecule obtained in Synthesis Example 10 A curable composition was prepared in the same manner as in Reference Example 1 except that the curable silyl group-containing acrylic polymer 10 was blended.

(Reference Example 5)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1 per molecule obtained in Synthesis Example 2 was obtained. A curable composition was prepared in the same manner as in Reference Example 1 except that the crosslinkable silyl group-containing polyoxyalkylene polymer 2 having 5 crosslinkable silyl groups was blended.

(Reference Example 6)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1 per molecule obtained in Synthesis Example 3 was obtained. A curable composition was prepared in the same manner as in Reference Example 1 except that the crosslinkable silyl group-containing polyoxyalkylene polymer 3 having 0.0 crosslinkable silyl groups was blended.

(Reference Example 7)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 0 per molecule obtained in Synthesis Example 4 was obtained. A curable composition was prepared in the same manner as in Reference Example 1 except that the crosslinkable silyl group-containing polyoxyalkylene polymer 4 having 8 crosslinkable silyl groups was blended.

(Reference Example 8)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1 per molecule obtained in Synthesis Example 7 was obtained. A curable composition was prepared in the same manner as in Reference Example 1, except that the crosslinkable silyl group-containing polyoxyalkylene polymer 7 having 25 crosslinkable silyl groups was blended.

(Reference Example 9)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1 per molecule obtained in Synthesis Example 8 was obtained. A curable composition was prepared in the same manner as in Reference Example 1 except that the crosslinkable silyl group-containing acrylic polymer 8 having 29 crosslinkable silyl groups was blended.

(Reference Example 10)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 0 per molecule obtained in Synthesis Example 9 was obtained. A curable composition was prepared in the same manner as in Reference Example 1, except that the crosslinkable silyl group-containing acrylic polymer 9 having 72 crosslinkable silyl groups was blended.

(Reference Example 11)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1 per molecule obtained in Synthesis Example 11 was obtained. A curable composition was prepared in the same manner as in Reference Example 1, except that the crosslinkable silyl group-containing acrylic-modified polyoxyalkylene polymer 11 having 25 crosslinkable silyl groups was blended.

(Reference Example 12)
As shown in Table 1, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1 per molecule obtained in Synthesis Example 12 was obtained. A curable composition was prepared in the same manner as in Reference Example 1, except that the crosslinkable silyl group-containing acrylic-modified polyoxyalkylene polymer 12 having 21 crosslinkable silyl groups was blended.

(Comparative Example 1)
As shown in Table 1, in place of the crosslinkable silyl group-containing polyoxyalkylene polymer 1 obtained in Synthesis Example 1, an average of 1.7 crosslinking properties per molecule obtained in Synthesis Example 5 were obtained. A curable composition was prepared in the same manner as in Reference Example 1 except that the crosslinkable silyl group-containing polyoxyalkylene polymer 5 having a silyl group was blended.

The compounding amounts of the compounding substances in Table 1 are shown in parts by mass, and Note 1) to Note 19) are as follows.
* 1: Polymer 1 obtained in Synthesis Example 1 (number of crosslinkable silyl groups: 1.2)
* 2: Polymer 2 obtained in Synthesis Example 2 (number of crosslinkable silyl groups: 1.5)
* 3: Polymer 3 obtained in Synthesis Example 3 (1.0 number of crosslinkable silyl groups)
* 4: Polymer 4 obtained in Synthesis Example 4 (number of crosslinkable silyl groups: 0.8)
* 5: Polymer 7 obtained in Synthesis Example 7 (number of crosslinkable silyl groups: 1.25)
* 6: Polymer 8 obtained in Synthesis Example 8 (Crosslinkable silyl group number 1.29)
* 7: Polymer 9 obtained in Synthesis Example 9 (number of crosslinkable silyl groups 0.72)
* 8: Polymer 11 obtained in Synthesis Example 11 (number of crosslinkable silyl groups: 1.25)
* 9: Polymer 12 obtained in Synthesis Example 12 (number of crosslinkable silyl groups: 1.21)
* 10: Polymer 5 obtained in Synthesis Example 5 (number of crosslinkable silyl groups: 1.7)
* 11: Dibutyltin diacetylacetonate (manufactured by Nitto Kasei Co., Ltd., trade name: U-220)
* 12: Asahi Glass Co., Ltd., trade name: PML3012
* 13: Toagosei Co., Ltd., trade name: UP-1000
* 14: Polymer 6 obtained in Synthesis Example 6 (number of crosslinkable silyl groups: 0.3)
* 15: Polymer 10 obtained in Synthesis Example 10 (number of crosslinkable silyl groups: 0.22)
* 16: Maruo Calcium Co., Ltd., trade name: Calfine 200M
* 17: Shiraishi Calcium Industry Co., Ltd., trade name: Whiten SB
* 18: Vinyltrimethoxysilane (Shin-Etsu Chemical Co., Ltd., trade name: KBM1003)
* 19: Aminosilane compound (manufactured by Shin-Etsu Chemical Co., Ltd., trade name: KBM603)

  The following performance test was done about the obtained curable composition. The results are shown in Table 2.

1) Paint adhesion test Sealing material curing conditions: 7 days under 23 ° C. and 50% RH conditions Paint curing conditions: 7 days under 23 ° C. and 50% RH conditions Evaluation method: The obtained composition is extended to a thickness of 3 mm. , Cured at 23 ° C. and 50% relative humidity (RH), and after 7 days, paint was applied to the surface of the cured product with a brush, and after 7 days, a grid pattern test at 2 mm intervals using Nichiban cellophane tape (25 pieces) ) The case where the percentage (%) of the number of cross-cuts remaining on the sealant surface with respect to the total number of cross-cuts was less than 40% was evaluated as x, the case of 40% or more and less than 80% was evaluated as ○, and the case of 80% or more was evaluated as ◎. The paint used is as shown in Table 2.

2) Paint non-contamination test Sealing material curing conditions: 7 days under 23 ° C. and 50% RH coating curing conditions: 7 days under 23 ° C. and 50% RH conditions Evaluation method: Sealing material cured under the above curing conditions After applying the paint under the above curing conditions, outdoor exposure was performed at 45 degrees south for 6 months, and the presence or absence of contamination of the paint was visually examined. The case where the contamination was severe was evaluated as x, and the case where there was no contamination was evaluated as ○. The paint used was the same as in the paint adhesion test. The results for each paint are summarized in Table 3.

3) Storage stability test Each sealing material was filled in a 200 cc glass bottle, and the viscosity after filling and the viscosity after storage at 50 ° C for 1 month were measured. The measurement was performed at 10 rpm / 23 ° C. using a BS type viscometer.
Evaluation method: When the viscosity ratio obtained by the formula after storage / before storage exceeds 1.3 times, ×, when 1.1 to 1.3 times, Δ, when less than 1.1 times, ○ evaluated.

In Table 2, Note 20) to Note 29) are as follows.
* 20: Vildec; Solvent-based acrylic, Dainippon Paint Co., Ltd. * 21: Bureon; Water-based acrylic, Dainippon Paint Co., Ltd. * 22: Odecoat G; Water-based acrylic, Nihon Paint ( Product name * 23: DAN Uni; water-based acrylic, Nippon Paint Co., Ltd. product name * 24: New Top Rescreen; water-based acrylic silicone, SK Kaken Co., Ltd. product name * 25: Please coat Aqueous acrylic, SK Kaken Co., Ltd. product name * 26: New soft lysine; Aqueous acrylic, SK Kaken Co., Ltd. product name * 27: JP650; Aqueous acrylic, product of Aika Industry Co., Ltd. Name * 28: Indy Art Sera; water-based acrylic, trade name of Nippon Paint Co., Ltd. * 29: Sipolok; water-based acrylic, trade name of SK Kaken Co., Ltd.

  As shown in Table 2, in Comparative Example 1 using a crosslinkable silyl group-containing organic polymer having an average of 1.7 crosslinkable silyl groups in the molecule, the paint adhesion was very poor. In Reference Examples 1 to 12 using the crosslinkable silyl group-containing organic polymer having 0.5 to 1.5 crosslinkable silyl groups in the molecule, good paint adhesion and storage stability are obtained. The problem of paint contamination was also solved.

(Comparative Example 2)
Instead of the crosslinkable silyl-containing polyoxyalkylene polymer 1 (A: 100 parts by weight) obtained in Synthesis Example 1, an average of 0.3 crosslinkable silyl in one molecule obtained in Synthesis Example 6 The curable composition was adjusted by the same method as in Reference Example 1 except that the crosslinkable silyl group-containing polyoxyalkylene polymer 6 (100 parts by weight) having a group was blended. The composition did not cure.

  Examples of the elastic putty composition of the present invention will be described below.

(Synthesis Example 13) Synthesis of Polymer 13 Hydroxyl-converted molecular weight 7,000 obtained by reacting propylene oxide in the presence of zinc hexacyanocobaltate-glyme complex catalyst with propylene glycol as an initiator, and Mw / Mn = A polyoxypropylene of 1.2 was obtained. Mw7, which has methyldimethoxysilane, which is a hydrosilyl compound, reacted in the presence of a platinum catalyst, has a methyldimethoxysilyl group at the terminal, and 1.2 crosslinkable silyl groups per molecule on average. 000 of polymer 13 was obtained.

(Synthesis Example 14) Synthesis of Polymer 14 In the same manner as in Synthesis Example 13, Mw of 7,000 having a methyldimethoxysilyl group at the terminal and an average of 0.8 crosslinkable silyl groups in one molecule. A polymer 14 was obtained.

(Synthesis Example 15) Synthesis of Polymer 15 In the same manner as in Synthesis Example 13, Mw of 7,000 having a methyldimethoxysilyl group at the terminal and an average of 1.0 crosslinkable silyl group in one molecule. A polymer 15 was obtained.

(Synthesis Example 16) Synthesis of Polymer 16 In the same manner as in Synthesis Example 13, Mw of 7,000 having a methyldimethoxysilyl group at the terminal and an average of 1.5 crosslinkable silyl groups in one molecule. A polymer 16 was obtained.

(Synthesis Example 17) Synthesis of Polymer 17 In the same manner as in Synthesis Example 13, Mw of 7,000 having a methyldimethoxysilyl group at the terminal and having 1.7 crosslinkable silyl groups per molecule on average. A polymer 17 was obtained.

(Synthesis Example 18) Synthesis of Polymer 18 In the same manner as in Synthesis Example 13, Mw of 7,000 having a methyldimethoxysilyl group at the terminal and an average of 0.3 crosslinkable silyl groups in one molecule. A polymer 18 was obtained.

(Synthesis Example 19) Synthesis of Polymer 19 The polymer 14 obtained in Synthesis Example 14 and the polymer 17 obtained in Synthesis Example 17 were blended at a solid content ratio of 50/50 and averaged 1 per molecule. A polymer 19 having an Mw of 7,000 having 25 crosslinkable silyl groups was obtained.

(Synthesis Example 20) Synthesis of Polymer 20 In the same manner as in Synthesis Example 11, on average, a polymer P1 having 1.5 crosslinkable silyl groups in one molecule was obtained, and then the obtained polymer P1 was obtained. The polymer 13 obtained in Synthesis Example 13 was blended at a solid content ratio of 20/80 to obtain a polymer 20 having 1.25 crosslinkable silyl groups per molecule on average.

(Synthesis Example 21) Synthesis of Polymer 21 Polymer 17 obtained in Synthesis Example 17 and polymer 9 obtained in Synthesis Example 9 were blended at a solid content ratio of 50/50, and averaged 1 in 1 molecule. Polymer 21 having 21 crosslinkable silyl groups was obtained.

(Experimental Example 1)
As shown in Table 3, as the component (A), a crosslinkable silyl group-containing polyoxyalkylene polymer 13 having 1.2 crosslinkable silyl groups per molecule on average obtained in Synthesis Example 13; As component (D), fine calcium carbonate and a dehydrating agent (vinyltrimethoxysilane) were charged in predetermined amounts shown in Table 3 (mixture 1), and the mixture was heated and vacuum mixed and stirred at 110 ° C. for 2 hours. Dehydration was performed. Further, component (B) curing catalyst and silane coupling agent were added in predetermined amounts as shown in Table 3, and stirred to prepare a putty composition.

The compounding amounts of the compounding substances in Table 3 are shown in parts by mass, and Note 6, Note 7, Note 11, Note 13, Note 15, Note 18 and Note 19 are the same as Table 1, Note 30) to Note 42). Is as follows.
* 30: Polymer 13 obtained in Synthesis Example 13 (1.2 crosslinkable silyl groups)
* 31: Polymer 14 obtained in Synthesis Example 14 (number of crosslinkable silyl groups: 0.8)
* 32: Polymer 15 obtained in Synthesis Example 15 (number of crosslinkable silyl groups: 1.0)
* 33: Polymer 16 obtained in Synthesis Example 16 (number of crosslinkable silyl groups: 1.5)
* 34: Polymer 19 obtained in Synthesis Example 19 (number of crosslinkable silyl groups: 1.25)
* 35: Polymer 20 obtained in Synthesis Example 20 (number of crosslinkable silyl groups: 1.25)
* 36: Polymer 21 obtained in Synthesis Example 21 (number of crosslinkable silyl groups: 1.21)
* 37: Polymer 17 obtained in Synthesis Example 17 (number of crosslinkable silyl groups: 1.7)
* 38: manufactured by Maruo Calcium Co., Ltd., trade name: N-40 (average primary particle size: 0.03 μm)
* 39: manufactured by Asahi Glass Co., Ltd., trade name: Exenol 5030 (weight average molecular weight 5100)
* 40: Polymer 18 obtained in Synthesis Example 18 (number of crosslinkable silyl groups: 0.3)
* 41: Sumitomo 3M Co., Ltd., trade name: Glass Bubbles S-22 (true specific gravity 0.22)
* 42: Maruo Calcium Co., Ltd., trade name: Calfine 100 (average primary particle size 0.15 μm)

(Experimental Example 2)
As shown in Table 3, as a component (C), a polyoxyalkylene polymer not containing a crosslinkable silyl group was further blended into the mixture 1, and the blending ratio of each blended substance was as shown in Table 3, except that the putty composition was prepared in the same manner as experiment example 1.

(Experimental Example 3)
As shown in Table 3, as component (C), the polyoxyalkylene polymer putty composition by the same method except for using an acrylic polymer not containing the experimental example 2 a crosslinkable silyl group in place of Was prepared.

(Experimental Example 4)
As shown in Table 3, as component (C), except for using a polyoxyalkylene polymer and an acrylic polymer had a putty composition was prepared in the same manner as in Experiment Example 2.

(Experimental Example 5)
As shown in Table 3, as component (C), a crosslinkability containing 0.22 crosslinkable silyl groups on average in one molecule obtained in Synthesis Example 10 instead of the polyoxyalkylene polymer. except for using silyl group-containing acrylic polymer 10 putty composition was prepared in the same manner as in experiment example 2.

(Experimental Example 6)
As shown in Table 3, as component (C), a crosslinkability containing 0.3 crosslinkable silyl groups on average in one molecule obtained in Synthesis Example 18 instead of the polyoxyalkylene polymer. except for using silyl group-containing polyoxyalkylene polymer 18 putty composition was prepared in the same manner as in experiment example 2.

(Example 1 )
As shown in Table 3, except that was further blended component (E) Lightweight powder mixture 1, the putty composition was prepared in the same manner as in Experiment Example 1.

(Experimental Example 7)
As shown in Table 3, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, an average of 0.8 crosslinkable silyl groups in one molecule obtained in Synthesis Example 14 was used. except that a crosslinking silyl group-containing polyoxyalkylene polymers 14 having group was adjusted putty composition in the same manner as in experiment example 1.

(Experimental Example 8)
As shown in Table 3, instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13 as component (A), 1.0 crosslinkable silyl on average in one molecule obtained in Synthesis Example 15 was used. except that a crosslinking silyl group-containing polyoxyalkylene polymers 15 having group was adjusted putty composition in the same manner as in experiment example 1.

(Experimental Example 9)
As shown in Table 3, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, an average of 1.5 crosslinkable silyl groups per molecule obtained in Synthesis Example 16 was used. except that a crosslinking silyl group-containing polyoxyalkylene polymers 16 having group was adjusted putty composition in the same manner as in experiment example 1.

(Experimental Example 10)
As shown in Table 3, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, an average of 1.25 crosslinkable silyl groups in one molecule obtained in Synthesis Example 19 was used. to prepare a putty composition by the same method as experimental example 1 except for using the crosslinkable silyl group-containing polyoxyalkylene polymer 19 containing group.

(Reference Example 13)
As shown in Table 3, as the component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, an average of 1.29 crosslinkable silyl groups in one molecule obtained in Synthesis Example 8 was used. by the same method as experimental example 1 except for using the crosslinkable silyl group-containing acrylic polymer 8 containing a group to prepare a putty composition.

(Reference Example 14)
As shown in Table 3, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, 0.72 crosslinkable silyl on average in one molecule obtained in Synthesis Example 9 was used. by the same method as experimental example 1 except for using the crosslinkable silyl group-containing acrylic polymer 9 containing a group to prepare a putty composition.

(Experimental Example 1 1)
As shown in Table 3, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, an average of 1.25 crosslinkable silyl groups in one molecule obtained in Synthesis Example 20 was used. by the same method as experimental example 1 except for using the crosslinkable silyl group-containing acrylic-modified polyoxyalkylene polymer 20 containing a group to prepare a putty composition.

(Experimental Example 1 2)
As shown in Table 3, as a component (A), instead of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, 1.21 crosslinkable silyl on average in one molecule obtained in Synthesis Example 21 by the same method as experimental example 1 except for using the crosslinkable silyl group-containing acrylic-modified polyoxyalkylene polymer 21 containing a group to prepare a putty composition.

(Comparative Example 3)
As shown in Table 3, except for using calcium carbonate having an average primary particle diameter of 0.15μm in place of particulate calcium carbonate, the putty composition was prepared in the same manner as in Experiment Example 1.

(Comparative Example 4)
As shown in Table 3, in place of the crosslinkable silyl group-containing polyoxyalkylene polymer 13, a crosslinkable silyl group having an average of 1.7 crosslinkable silyl groups in one molecule obtained in Synthesis Example 17 except for using the content polyoxyalkylene polymer 17, the putty composition was prepared in the same manner as in experiment example 1.

  About the obtained putty composition, the measurement of the SVI value and the following performance test were performed. The results are shown in Table 4.

1) Workability test The joint portion is filled with the putty composition, and the degree of dent in the joint portion is visually observed when smoothed with a spatula.
Evaluation of workability: A: No dent is seen, X: A dent is seen.

2) Paint adhesion test Putty composition curing conditions: 7 days under 23 ° C. and 50% RH conditions Paint curing conditions: 7 days under 23 ° C. and 50% RH conditions Evaluation method: The resulting composition is 3 mm thick Extend and cure under conditions of 23 ° C. and 50% relative humidity (RH). After 7 days, paint is applied to the surface of the cured product with a brush, and further 7 days later, using a Nichiban cellophane tape, a 2-mm-interval grid test (25 ). The case where the percentage (%) of the number of grids remaining on the cured product surface with respect to the total number of grids was less than 40% was evaluated as x, the case of 40% or more and less than 80% was evaluated as ◯, and the case of 80% or more was evaluated as ◎. The paint used is as shown in Table 2.

3) Paint non-contamination test Putty composition curing condition: 7 days under 23 ° C. 50% RH condition Paint curing condition: 7 days under 23 ° C. 50% RH condition Evaluation method: Putty composition cured under the above curing conditions After the paint was applied to the object under the above curing conditions, it was exposed outdoors at a south surface of 45 ° C. for 6 months, and the presence or absence of contamination of the paint was examined visually. The case where the contamination was severe was evaluated as x, and the case where there was no contamination was evaluated as ○. The paint used was the same as in the paint adhesion test. The results for each paint are summarized in Table 3.

4) Storage stability test Each putty composition was filled in a 200 cc glass bottle, and the viscosity after filling and the viscosity after storage at 50 ° C for 1 month were measured. The measurement was performed at 10 rpm / 23 ° C. using a BS type viscometer.
Evaluation method: When the viscosity ratio obtained by the formula after storage / before storage exceeds 1.3 times, ×, when 1.1 to 1.3 times, Δ, when less than 1.1 times, ○ evaluated.

  In Table 4, Note 20) to Note 29) are the same as Table 2.

  As shown in Table 4, in Comparative Example 3 in which the SVI value is less than 6, the workability is poor and the crosslinkable silyl group-containing organic compound having an average of 1.7 crosslinkable silyl groups in one molecule. In Comparative Example 4 using a polymer, the paint adhesion was very poor, whereas the SVI value was 6 or more, and an average of 0.5 to 1.5 crosslinks per molecule. In Example 1 using a crosslinkable silyl group-containing organic polymer having a silyl group, excellent workability and paint adhesion were exhibited, and the paint non-staining property was also good.

(Comparative Example 5)
Instead of the crosslinkable silyl-containing polyoxyalkylene polymer 13 (A: 100 parts by weight) obtained in Synthesis Example 1, an average of 0.3 crosslinkable silyl groups in one molecule obtained in Synthesis Example 18 except that a crosslinking silyl group-containing polyoxyalkylene polymer having a group 18 (100 parts by weight) were subjected to adjusting performance test putty composition by the same method as experimental example 1, the resulting The composition did not cure.

  The present curable composition and the elastic putty composition of the present invention can be made into a one-component type or a two-component type as needed, but can be suitably used particularly as a one-component type. . The present curable composition and the elastic putty composition of the present invention are suitably used as putty materials, sealing materials, adhesives, adhesive materials, water-stopping agents, sealants, coating materials, potting materials and the like. Since the present curable composition has excellent storage stability and excellent coating properties such as good paint adhesion and no paint contamination, it is used particularly for sealing outer wall materials. However, it can be used for various other buildings, automobiles, civil engineering, electric / electronic fields and the like. In addition, the elastic putty composition of the present invention is excellent in paint adhesion, stain resistance, and has good workability, so it is particularly preferable to use it for joint treatment of the joint method of the outer wall, It can be used for various other buildings, automobiles, civil engineering, electrical / electronic fields, etc.

Claims (9)

It is an elastic putty composition used for the joint structure of the outer wall, in which the mating part of the outer wall material of the building is a seamless joint,
(A) a crosslinkable silyl group-containing organic polymer having a weight average molecular weight of 2,000 to 50,000 having an average of 0.5 to 1.5 crosslinkable silyl groups in the molecule;
(B) a curing catalyst,
(D) surface-treated calcium carbonate having an average primary particle size of 0.005 to 0.03 μm , and
(E) a lightweight powder having a true specific gravity of 0.1 to 1 ,
The component (A) is at least one compound selected from the group consisting of a crosslinkable silyl group-containing polyoxyalkylene polymer and a crosslinkable silyl group-containing polyisobutylene polymer, and the component (A) Paint adhesiveness characterized in that 0.1 to 30 parts by mass of component (B) and 1 to 300 parts by mass of component (D) are blended with respect to 100 parts by mass, and the structural viscosity index is 6 or more. Excellent elastic putty composition for joint structure of outer wall . And (C) an organic polymer having a weight average molecular weight of 2,000 or more and 50,000 or less containing no crosslinkable silyl group or less than 0.5 crosslinkable silyl groups. Item 2. An elastic putty composition for jointless structure of an outer wall according to Item 1. The component (C) does not contain a crosslinkable silyl group or a polyoxyalkylene polymer containing less than 0.5 crosslinkable silyl groups and / or does not contain a crosslinkable silyl group or less than 0.5 The elastic putty composition for a joint structure of an outer wall according to claim 2, which is a (meth) acrylic polymer containing a crosslinkable silyl group. The component (C) is a polyoxyalkylene polymer containing less than 0.5 crosslinkable silyl groups and / or a (meth) acrylic polymer containing less than 0.5 crosslinkable silyl groups. The elastic putty composition for a seamless structure of an outer wall according to claim 2 or 3. 5. The outer wall according to claim 1, wherein the component (A) has 0.7 to 1.5 crosslinkable silyl groups on average in the molecule. Elastic putty composition for joint structure . The said component (A) has 1.0 or more and 1.5 or less crosslinkable silyl groups on average in a molecule | numerator, The absence of the outer wall of any one of Claims 1-4 characterized by the above-mentioned. Elastic putty composition for joint structure .   A method of applying a paint to the surface of a cured product of the elastic putty composition for jointless structure of an outer wall according to any one of claims 1 to 6.   A coating material, wherein a paint is applied by the method according to claim 7.   A joint structure for an outer wall manufactured using the elastic putty composition for a joint structure for an outer wall according to any one of claims 1 to 6.