Two-component room-temperature rapidly curing organopolysiloxane composition and article, and method for improving the deep curing properties of a two-component room-temperature curing organopolysiloxane composition.

Abstract

To provide a two component type room temperature fast curable organopolysiloxane composition which is a two component type of a dealcoholization type excellent in fast curing property and deep part curing property.SOLUTION: A two-component type room temperature curable organopolysiloxane composition of a dealcoholization type comprises: a first agent including a hydrolysable organosiloxane compound represented by the following formula (3) and / or a partial hydrolysis condensation product as a silanol group or hydrolysable silyl group-containing organopolysiloxane having a specific viscosity and a curing agent; and a second agent including the organosiloxane and a curing catalyst, where the first agent and / or the second agent further contain / contains silane coupling agents such as aminosilanes, epoxysilanes, and isocyanatesilanes. (R6 is an unsubstituted or substituted univalent 1-20C hydrocarbon group, R7 is an unsubstituted or substituted 1-20C alkyl group or an unsubstituted or substituted 3-20C cycloalkyl group, and a is 1-3.)SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a two-component room temperature curable organopolysiloxane composition, particularly a bis-silyl type hydrolyzable organosilane compound having two hydrolyzable silyl groups in one molecule and a group having a carbon-carbon double bond linked to a silicon atom present one by one in each of the two hydrolyzable silyl groups, that is, an alkoxysilyl-vinylene group (alkoxysilyl-ethenylene group), and / or a partial hydrolysis condensate thereof (hydrolyzable organosiloxane oligomer), a two-component room temperature curable organopolysiloxane composition containing the same as a curing agent (crosslinking agent), various articles having the composition , average and two-component type room Warm and hard curable organopolysiloxane composition deep part curing Sexual improvement method.

Background Art

[0002] Conventionally, room temperature curable organopolysiloxane compositions that crosslink by a hydrolysis-condensation reaction upon contact with moisture (humidity) in the air and cure at room temperature (23°C ± 15°C) to form an elastomer cured product (silicone rubber cured product) are known in various types. In particular, the de-alcohol type that cures by releasing alcohol during the condensation reaction during crosslinking is preferably used for sealing, adhesion, and coating of electric and electronic devices, etc., because it has no unpleasant odor and does not corrode metals.

[0003] Representative examples of such compositions include compositions comprising a silanol-terminated linear organopolysiloxane, an alkoxysilane, and an organotitanium compound; compositions comprising an alkoxysilyl-terminated linear organopolysiloxane, an alkoxysilane, and an alkoxytitanium; compositions comprising a linear organopolysiloxane whose ends are sealed with alkoxysilyl groups containing silethylene groups, an alkoxysilane, and an alkoxytitanium; and further, compositions comprising a silanol-terminated linear organopolysiloxane or an alkoxy-terminated linear organopolysiloxane and an alkoxy-α-silyl ester compound (Patent Documents 1-4: Japanese Patent Publication No. 39-27643, Japanese Unexamined Patent Publication No. 55-43119, Japanese Unexamined Patent Publication No. 7-39547, Japanese Unexamined Patent Publication No. 7-331076).

[0004] While these compositions exhibit some degree of storage stability, water resistance, and moisture resistance, they do not fully satisfy these physical properties. Furthermore, their rapid curing properties were still insufficient.

[0005] As mentioned above, linear organosiloxane polymers having hydrolyzable (reactive) alkoxysilyl groups at their ends are conventionally known. Compositions mainly composed of these linear organosiloxane polymers have excellent storage stability and do not easily lose their curability over time because the end groups of the polymer are sealed with alkoxysilyl groups beforehand. Furthermore, the workability (viscosity, thixotropy, etc.) can be arbitrarily adjusted. In addition, the polymer reacts with moisture in the air and crosslinks to form an elastomer (a cured product of the organopolysiloxane composition). This elastomer also possesses excellent properties (hardness, tensile strength, elongation at break).

[0006] However, compared to other conventionally known curing types such as de-oxime type, de-acetic acid type, and de-acetone type room-temperature curable organopolysiloxane compositions, de-alcohol type compositions exhibited insufficient curing due to their lower reactivity with moisture in the air.

[0007] On the other hand, among de-alcoholized, room-temperature curable organopolysiloxane compositions, two-component de-alcoholized, room-temperature curable organopolysiloxane compositions exhibit superior curability compared to one-component de-alcoholized, room-temperature curable organopolysiloxane compositions, but their curing in depth is slow, and sufficient curing in a short time has not been achieved. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Special Publication No. 39-27643 [Patent Document 2] Japanese Patent Application Publication No. 55-43119 [Patent Document 3] Special Publication No. 7-39547 [Patent Document 4] Japanese Patent Application Publication No. 7-331076 [Patent Document 5] Patent No. 5960843 [Patent Document 6] Patent No. 5997778 [Patent Document 7] International Publication No. 2015 / 194340 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The present inventors have proposed a room-temperature curable organopolysiloxane composition that can yield a cured product with excellent rapid curing properties and excellent moisture resistance (curing properties after storage under humid conditions) by proposing a linear organopolysiloxane polymer having an alkoxysilyl-vinylene group (alkoxysilyl-ethenylene group) at the end of its molecular chain, and a room-temperature curable organopolysiloxane composition mainly composed of this polymer (Patent Documents 5 and 6: Japanese Patent No. 5960843 and Japanese Patent No. 5997778). These compositions are excellent in terms of properties. However, because it is necessary to newly synthesize polymers with various molecular weights and substituent structures, they cannot be manufactured industrially advantageously. Therefore, the inventors have proposed a silicon compound having an alkoxysilyl-vinylene group (alkoxysilyl-ethenylene group) terminal structure and a one-component organopolysiloxane composition consisting of this silicon compound (Patent Document 7: International Publication No. 2015 / 194340). However, further improvements in rapid curing properties are expected to lead to improved production efficiency; therefore, for example, a two-component, room-temperature curable organopolysiloxane composition with improved rapid curing properties in the two-component type is desired.

[0010] The present invention has been made in view of the above circumstances, and relates to a de-alcoholized, room-temperature curable organopolysiloxane composition, which is a two-component, room-temperature rapidly curable organopolysiloxane composition with excellent rapid curing and deep curing properties, and various articles having the composition. , average Bini two-component type room Warm and hard Chemical organopolysiloxane composition deep part hardening Sexual improvement The purpose is to provide a method. [Means for solving the problem]

[0011] Regarding the problem of insufficient curability of conventional de-alcoholized, room-temperature curable organopolysiloxane compositions as described above, the present inventors have found that compounds having a structure in which the linking group of the alkoxysilyl group is a vinylene group (ethenylene group) exhibit remarkably superior hydrolysis of the alkoxy group in the alkoxysilyl group. Furthermore, based on this finding, the present inventors have discovered that by using a bissilyl-type hydrolyzable organosilane compound and / or its partially hydrolyzed condensate (hydrolyzable organosiloxane oligomer) as a crosslinking agent (curing agent), which is an organosilane compound having two hydrolyzable silyl groups in one molecule, represented by formula (3) described later, and in which a carbon-carbon double bond is linked to one silicon atom in each of the two hydrolyzable silyl groups, i.e., an alkoxysilyl-vinylene group (alkoxysilyl-ethenylene group) having two such groups on the same silicon atom in one molecule, a de-alcoholized type room-temperature curable organopolysiloxane composition can be obtained that exhibits particularly excellent rapid curing properties, as well as good storage stability and durability.

[0012] Furthermore, while two-component de-alcoholized room-temperature curable organopolysiloxane compositions exhibit superior curability compared to conventional one-component de-alcoholized room-temperature curable organopolysiloxane compositions, the present inventors have found that, in response to the problem of slow deep curing and insufficient curing in a short time, further investigations have led the inventors to the present invention. As a result, they have discovered that by separately formulating a two-component material in which a hydrolyzable organosilane compound and / or a partially hydrolyzed condensate represented by formula (3), described later, as the first component, and a curing catalyst as the second component, a two-component room-temperature rapidly curable organopolysiloxane composition can be obtained by mixing the first component containing the hydrolyzable organosilane compound and / or a partially hydrolyzed condensate represented by formula (3), described later, with the second component containing the curing catalyst, thereby providing even faster curing and deeper curing.

[0013] In other words, the present invention provides the following two-component room-temperature rapidly curing organopolysiloxane composition, a sealant, coating agent or adhesive containing the two-component room-temperature rapidly curing organopolysiloxane composition, and a method for improving the deep curing properties of the two-component room-temperature curing organopolysiloxane composition. [1] (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 100 parts by mass, [ka] (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer greater than or equal to 10.) [ka] (In general formula (2), R 2 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond with 1 to 20 carbon atoms, 5 (where x is an integer from 0 to 2 and m is an integer of 10 or more, and x is an integer from 0 to 2.) (B) Hydrolyzable organosilane compounds represented by the following general formula (3) and / or partially hydrolyzed condensates thereof: 0.1 to 100 parts by mass of the total of components (A) contained in the first and second agents. 25 Mass part [ka] (In general formula (3), R 6 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 7is independently an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms, and a is an integer of 1 to 3 independently for each silicon atom.) A first agent comprising (A) An organopolysiloxane having a viscosity at 23°C of 20 mPa·s or more and 5,000 mPa·s or less, represented by the following general formula (1) or (2): 10 to 100 parts by mass with respect to 100 parts by mass of the component (A) contained in the first agent, [Chemical formula] (In general formula (1), R 1 is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 10 or more.) [Chemical formula] (In general formula (2), R 2 is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R 3 is an oxygen atom or an alkylene group having 1 to 4 carbon atoms, R 4 is independently an unsubstituted or substituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond having 1 to 20 carbon atoms, R 5 is independently an alkyl group, an alkoxyalkyl group, an alkenyl group or an acyl group having 1 to 4 carbon atoms, x is an integer of 0 to 2, and m is an integer of 10 or more.) (C) A curing catalyst Alkyltin ester compounds as : With respect to 100 parts by mass of the total of the component (A) contained in the first agent and the second agent 0.01 ~ 5 parts by mass A second agent comprising and further, with respect to 100 parts by mass of the total of the component (A) contained in the first agent and the second agent (D) The filler is contained in the first and second components in parts 0.1 to 500 by mass, and (E) A silane coupling agent of aminosilanes, epoxysilanes or isocyanatosilanes is contained only in the first agent 0.1 ~ 20 parts by mass A two-component room temperature rapid curing organopolysiloxane composition. [2] The two-component room-temperature rapidly curing organopolysiloxane composition according to [1], wherein the amount of component (B) is 0.1 to 2.7 parts by mass per 100 parts by mass of the total amount of component (A) contained in the first and second agents. [3] Furthermore, the two-component room-temperature rapidly curing organopolysiloxane composition according to [1] or [2], wherein (F) an organopolysiloxane represented by the following general formula (4) is contained in the first and second components in a total of 100 parts by mass of component (A) contained in the first and second components, with each component containing 0 to 100 parts by mass (provided that at least one of the first or second component contains 0.01 parts by mass or more). [ka] (In general formula (4), R 8 (These are independently unsubstituted or substituted monovalent hydrocarbon groups having 1 to 20 carbon atoms and not containing aliphatic unsaturated bonds, and p is an integer between 1 and 2,000.) [4] A two-component, room-temperature rapidly curing organopolysiloxane composition according to any one of the following [1] to [3], wherein the ratio of the first agent to the second agent is 1:1 to 10:1 by mass. [5] A sealant containing a two-component, room-temperature rapidly curing organopolysiloxane composition as described in any of [1] to [4]. [6] A coating agent containing a two-component, room-temperature rapidly curing organopolysiloxane composition as described in any of [1] to [4]. [7] An adhesive containing a two-component, room-temperature rapidly curing organopolysiloxane composition as described in any of [1] to [4]. [8] (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 100 parts by mass, [ka] (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer greater than or equal to 10.) [ka] (In general formula (2), R 2 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond with 1 to 20 carbon atoms, 5 (where x is an integer from 0 to 2 and m is an integer of 10 or more, and x is an integer from 0 to 2.) (B) Hardener: 0.1 to 100 parts by mass of the total of components (A) contained in the first and second components. 25 Mass part A first agent containing, (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 10 to 100 parts by mass per 100 parts by mass of component (A) contained in the first agent. [ka] (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer greater than or equal to 10.) [ka] (In general formula (2), R 2 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond with 1 to 20 carbon atoms, 5 (where x is an integer from 0 to 2 and m is an integer of 10 or more, and x is an integer from 0 to 2.) (C) Curing catalyst Alkyltin ester compounds as : Per 100 parts by mass of the total of component (A) contained in the first and second agents 0.01 ~ 5Mass part A second agent comprising It consists of, and furthermore, for a total of 100 parts by mass of component (A) contained in the first and second agents (D) The filler is contained in the first and second components in parts 0.1 to 500 by mass, and (E) Silane coupling agents of aminosilanes, epoxysilanes, or isocyanatesilanes are added only to the first agent. 0.1 ~ 20 Containing parts by mass In a two-component, room-temperature curable organopolysiloxane composition, (B) The component is characterized by using a hydrolyzable organosilane compound represented by the following general formula (3) and / or a partially hydrolyzed condensate thereof. After mixing the first and second agents as described above, the mixture is exposed to air at 23°C and 50% RH, and after 20 minutes, the thickness from the surface exposed to air to the hardened portion is 0.65 mm or more. A method for improving the deep curing properties of a two-component, room-temperature curable organopolysiloxane composition. [ka] (In general formula (3), R 6 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 7 (where a is an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms, and a is an integer from 1 to 3, independently for each silicon atom.) [9] A method for improving the deep curing properties of a two-component room-temperature curable organopolysiloxane composition according to [8], wherein the amount of component (B) is 0.1 to 2.7 parts by mass per 100 parts by mass of the total amount of component (A) contained in the first and second agents. [ 10 ] Furthermore, the first and second agents each contain 0 to 100 parts by mass of (F) an organopolysiloxane represented by the following general formula (4) for every 100 parts by mass of the total of component (A) contained in the first and second agents (provided that at least one of the first or second agent contains 0.01 parts by mass or more) [8] or [ 9] A method for improving the deep curing properties of the two-component, room-temperature curable organopolysiloxane composition described above. [ka] (In general formula (4), R 8(These are independently unsubstituted or substituted monovalent hydrocarbon groups having 1 to 20 carbon atoms and not containing aliphatic unsaturated bonds, and p is an integer between 1 and 2,000.) [ 11 ] The ratio of the first agent to the second agent is 1:1 to 10:1 by mass.[8] 10 A two-component, room-temperature rapidly curing organopolysiloxane composition as described in any of the following: [Effects of the Invention]

[0014] The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention consists of a first component and a second component. As a result, when the first and second components are mixed, it exhibits excellent rapid curing and deep curing properties.

[0015] The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention exhibits particularly excellent rapid curing properties in air at room temperature and good workability. Furthermore, it possesses storage stability. Therefore, even after long-term storage, for example, for 6 months, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention rapidly cures when the first and second components are mixed and exposed to air, exhibiting excellent physical properties. Accordingly, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention is useful as a sealant, coating agent, and adhesive for applications requiring heat resistance, water resistance, and moisture resistance. In particular, it can be effectively used in building applications and electrical and electronic adhesive applications where moisture resistance and water resistance are required.

[0016] Furthermore, by using a hydrolyzable organosilane compound having two alkoxysilyl-vinylene groups, represented by the general formula (3) above, and / or a partially hydrolyzed condensate thereof, in other words, a hydrolyzable organosilane compound such as a bis(hydrolyzable silyl) type organosilane and / or a partially hydrolyzed condensate thereof (hydrolyzable siloxane oligomer), in which two silicon atoms, each present in the two hydrolyzable silyl groups within the molecule, are bonded to the same silicon atom via an ethenylene group (carbon-carbon double bond) (hydrolyzable silyl group-ethenylene group-silicon atom-ethenylene group-hydrolyzable silyl group), as a curing agent (component (B)), the present invention can provide a cured product that is particularly excellent in rapid curing and deep curing, while simultaneously exhibiting good storage stability and durability.

[0017] (B) Since general-purpose chlorosilanes and hydrosilanes (such as diorganodichlorosilanes and monohydroalkoxysilanes) can be used as starting materials for component (B), the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention can be manufactured industrially advantageously. Furthermore, as described above, by mixing the first and second agents, a room-temperature rapidly curing organopolysiloxane composition with excellent rapid curing and deep curing properties can be prepared. [Modes for carrying out the invention]

[0018] The present invention will be described in more detail below. <Two-component, room-temperature rapidly curing organopolysiloxane composition> The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention comprises a first agent containing specific amounts of components (A) and (B) described below, and a second agent containing specific amounts of components (A) and (C). The first agent does not contain component (C), and the second agent does not contain component (B). The following provides a detailed description of each component.

[0019] -(A) Ingredient: Organopolysiloxane- Component (A) is an organopolysiloxane represented by general formula (1) or (2) described later, and acts as the main component (base polymer) in the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention.

[0020] The organopolysiloxane represented by the general formula (1) below has both ends of the molecular chain encapsulated by hydroxyl groups (silanol groups) or diorganohydroxysiloxy groups bonded to silicon atoms, and the main chain is composed of diorganosiloxane units ((R 1 )2SiO 2 / 2 It is a linear diorganopolysiloxane consisting of a repeating structure of ). [ka] (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer greater than or equal to 10.)

[0021] In the above equation (1), R 1 The unsubstituted or substituted monovalent hydrocarbon group has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, and more preferably 1 to 8 carbon atoms. 1 The unsubstituted monovalent hydrocarbon groups include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, and eicosyl groups; and cyclopentyl groups. Examples include cycloalkyl groups such as cycloyl, cyclohexyl, and cycloheptyl groups; alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, pentenyl, and hexenyl groups; aryl groups such as phenyl, tolyl, xylyl, α-,β-naphthyl, and biphenylyl groups; and aralkyl groups such as benzyl, 2-phenylethyl, 3-phenylpropyl, 2-methyl-2-phenylethyl, and methylbenzyl groups. 1Examples of substituted monovalent hydrocarbon groups include groups in which some or all of the hydrogen atoms of an unsubstituted monovalent hydrocarbon group are substituted with halogen atoms such as F, Cl, Br, or cyano groups. Examples of such groups include 3-chloropropyl group, 3,3,3-trifluoropropyl group, and 2-cyanoethyl group. 1 Among these unsubstituted or substituted monovalent hydrocarbon groups, methyl, ethyl, and phenyl groups are preferred, and methyl and phenyl groups are particularly preferred in terms of availability, productivity, and cost. 1 They may be identical or different from one another.

[0022] Furthermore, the organopolysiloxane of component (A) represented by general formula (1) is preferably one with a viscosity of 20 to 1,000,000 mPa·s at 23°C, more preferably 50 to 500,000 mPa·s, particularly preferably 100 to 100,000 mPa·s, and even more preferably 500 to 80,000 mPa·s. A viscosity of 20 mPa·s or higher for the organopolysiloxane at 23°C is preferable because it makes it easy to obtain a coating film with excellent physical and mechanical strength. A viscosity of 1,000,000 mPa·s or lower is preferable because the viscosity of the composition does not become too high, resulting in good workability during use. In the present invention, viscosity is a value measured with a rotational viscometer unless otherwise specified (the same applies hereinafter). Examples of rotational viscometers include BL type, BH type, BS type, and cone plate type.

[0023] In formula (1) above, the value of n is an integer of 10 or more, and the difunctional diorganosiloxane units ((R) present in one molecule 1 )2SiO 2 / 2 (R) is the number or degree of polymerization of component (A). In embodiments in which the organopolysiloxane of component (A) can take on a viscosity within the above preferred range, in general formula (1), a bifunctional diorganosiloxane represented by n (R) 1 )2SiO 2 / 2The number of units or degree of polymerization of ) is an integer between 10 and 2,000, preferably between 30 and 1,500, more preferably between 50 and 1,200, and even more preferably between 100 and 1,000. In this invention, the degree of polymerization (or molecular weight) is determined as the number-average degree of polymerization (or number-average molecular weight) in terms of polystyrene in gel permeation chromatography (GPC) analysis using toluene or the like as the developing solvent (the same applies hereinafter).

[0024] Furthermore, the organopolysiloxane represented by the general formula (2) below is a linear organopolysiloxane in which both ends of the molecular chain are sealed with hydrolyzable silyl groups such as alkoxysilyl groups. [ka] (In general formula (2), R 2 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond with 1 to 20 carbon atoms, 5 (where x is an integer from 0 to 2 and m is an integer of 10 or more, and x is an integer from 0 to 2.)

[0025] In equation (2) above, R 2The group is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, more preferably 1 to 6 carbon atoms, and even more preferably 1 to 3 carbon atoms. Examples include linear alkyl groups, branched alkyl groups, cyclic alkyl groups, alkenyl groups, aryl groups, aralkyl groups, and halogenated alkyl groups. Examples of linear alkyl groups include methyl, ethyl, propyl, hexyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, and eicosyl groups. Examples of branched alkyl groups include isopropyl, isobutyl, tert-butyl, and 2-ethylhexyl groups. Examples of cyclic alkyl groups include cyclopentyl, cyclohexyl, and cycloheptyl groups. Examples of alkenyl groups include vinyl, allyl, propenyl, isopropenyl, butenyl, pentenyl, and hexenyl groups. Examples of aryl groups include phenyl, tolyl, xylyl, α-,β-naphthyl, and biphenylyl groups. Examples of aralkyl groups include benzyl, 2-phenylethyl, 3-phenylpropyl, 2-methyl-2-phenylethyl, and methylbenzyl groups. Examples of alkyl halogens include 3-chloropropyl, 3,3,3-trifluoropropyl, 2-(nonafluorobutyl)ethyl, and 2-(heptadecafluorooctyl)ethyl groups. 2 A methyl group or a phenyl group is preferred as the element.

[0026] In equation (2) above, R 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 3 Examples of alkylene groups having 1 to 4 carbon atoms include methylene, ethylene, propylene, and butylene groups. 3 As such, oxygen atoms and ethylene groups are preferred. Also, R 4R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond and independently has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, more preferably 1 to 6 carbon atoms, and even more preferably 1 to 3 carbon atoms. 4 Examples include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, and eicosyl groups; cycloalkyl groups such as cyclopentyl, cyclohexyl, and cycloheptyl groups; phenyl and tolyl groups. Examples of such groups include xylyl groups, alpha-, β-naphthyl groups, biphenylyl groups and other aryl groups, benzyl groups, 2-phenylethyl groups, 3-phenylpropyl groups, 2-methyl-2-phenylethyl groups, methylbenzyl groups and other aralkyl groups, and groups in which some or all of the hydrogen atoms to which the carbon atoms of these groups are bonded are substituted with halogen atoms such as fluorine, chlorine, bromine, or cyano groups. Examples of such groups include 3-chloropropyl groups, 3,3,3-trifluoropropyl groups, and 2-cyanoethyl groups. 4 Preferably, the group is a methyl group, an ethyl group, or a phenyl group.

[0027] In equation (2) above, R 5 R is independently an alkyl group, alkoxyalkyl group, alkenyl group, or acyl group having 1 to 4 carbon atoms. 5 Examples of alkyl groups include R 2 Examples include alkyl groups with 1 to 4 carbon atoms, similar to those exemplified above. 5 Examples of alkoxyalkyl groups include those with 2 to 4 carbon atoms, such as methoxyethyl group and methoxypropyl group. 5 Examples of alkenyl groups include R 2 Examples include alkenyl groups having 2 to 4 carbon atoms, similar to those exemplified above. 5 Examples of acyl groups include those with 1 to 4 carbon atoms, such as acetyl groups and propionyl groups. 5It is preferable that the group is an alkyl group, and more preferably a methyl group or an ethyl group.

[0028] In formula (2) above, x is an integer between 0 and 2 (0, 1, or 2), preferably 0 or 1, and more preferably 0. Note that the hydrolyzable group is OR. 5 The number of organoxy groups, such as alkoxy groups, bonded to the silicon atom shown is 2 to 6, preferably 4 to 6, and more preferably 4 or 6, per molecule.

[0029] Furthermore, the organopolysiloxane of component (A) represented by general formula (2) preferably has a viscosity of 20 to 1,000,000 mPa·s at 23°C, more preferably 50 to 500,000 mPa·s, particularly preferably 100 to 200,000 mPa·s, and even more preferably 500 to 100,000 mPa·s. A viscosity of 20 mPa·s or higher for the organopolysiloxane at 23°C is preferable because it makes it easy to obtain a coating film with excellent physical and mechanical strength. A viscosity of 1,000,000 mPa·s or lower is preferable because the viscosity of the composition does not become too high, resulting in good workability during use.

[0030] The value of m in formula (2) above is an integer of 10 or more, and the bifunctional diorganosiloxane units ((R) present in one molecule 2 )2SiO 2 / 2 (R) is the number or degree of polymerization of component (A). In embodiments in which the organopolysiloxane of component (A) can take on a viscosity within the above preferred range, in general formula (2), a bifunctional diorganosiloxane ((R) represented by m is used. 2 )2SiO 2 / 2 The number of units or degree of polymerization is an integer between 10 and 2,000, preferably between 50 and 1,800, more preferably between 100 and 1,700, and even more preferably between 200 and 1,600. (A) One or more organopolysiloxanes of component (A) can be used in combination.

[0031] -(B) Component: Hydrolyzable organosilane compound and / or partially hydrolyzed condensate thereof - Component (B) of the present invention acts as a curing agent (crosslinking agent) in the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention. Component (B) is a hydrolyzable organosilane compound and / or a partially hydrolyzed condensate thereof having two alkoxysilyl-vinylene groups (alkoxysilyl-ethenylene groups) on the same silicon atom, represented by the following general formula (3). In this invention, a partially hydrolyzed condensate refers to an organosiloxane oligomer having at least three residual hydrolyzable groups in one molecule, which is produced by partially hydrolyzing and condensing the above-mentioned hydrolyzable organosilane. In this invention, an organosiloxane oligomer having two residual hydrolyzable groups may also be used in combination.

[0032] [ka] (In general formula (3), R 6 R is an independent unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 7 (where a is an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms, and a is an integer from 1 to 3, independently for each silicon atom.)

[0033] Here, in equation (3) above, each R 6 The unsubstituted or substituted monovalent hydrocarbon group has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, and more preferably 1 to 8 carbon atoms. 6Examples of unsubstituted monovalent hydrocarbon groups include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, and eicosyl; and cyclopentyl Examples include cycloalkyl groups such as cyclohexyl and cycloheptyl groups; alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, pentenyl, and hexenyl groups; aryl groups such as phenyl, tolyl, xylyl, α-,β-naphthyl, and biphenylyl groups; and aralkyl groups such as benzyl, 2-phenylethyl, 3-phenylpropyl, 2-methyl-2-phenylethyl, and methylbenzyl groups. 6 Examples of substituted monovalent hydrocarbon groups include groups in which some or all of the hydrogen atoms of these unsubstituted monovalent hydrocarbon groups are substituted with halogen atoms such as F, Cl, Br, or cyano groups, such as 3-chloropropyl group, 3,3,3-trifluoropropyl group, and 2-cyanoethyl group. 6 Among the unsubstituted or substituted monovalent hydrocarbon groups, methyl, ethyl, and phenyl groups are preferred, with methyl and phenyl groups being particularly preferred in terms of availability, productivity, and cost. 6 They may be the same or different from one another.

[0034] In equation (3), R 7The group is an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms. The unsubstituted or substituted alkyl group has 1 to 20 carbon atoms, preferably 1 to 6 carbon atoms, and more preferably 1 to 4 carbon atoms. Examples of the unsubstituted alkyl group include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, and eicosyl groups. The unsubstituted or substituted cycloalkyl group has 3 to 20 carbon atoms, preferably 4 to 8 carbon atoms, and more preferably 5 or 6 carbon atoms. Examples of unsubstituted cycloalkyl groups include cyclopentyl, cyclohexyl, and cycloheptyl groups. Furthermore, some or all of the hydrogen atoms of these unsubstituted alkyl groups or unsubstituted cycloalkyl groups may be substituted with halogen atoms such as F, Cl, and Br, or cyano groups. Examples of substituted alkyl groups and substituted cycloalkyl groups include 3-chloropropyl, 3,3,3-trifluoropropyl, and 2-cyanoethyl groups. 7 Of these, methyl and ethyl groups are preferred from the standpoint of hydrolysis, with methyl groups being particularly preferred.

[0035] In formula (3) above, a is the number of alkoxy groups bonded to each silicon atom of the alkoxysilyl-vinylene group, and is an integer from 1 to 3 independently for each silicon atom, with 2 or 3 being preferable from the viewpoint of curability. In particular, a molecule in which two alkoxysilyl-vinylene groups each have three alkoxy groups such as methoxy groups, i.e., a molecule with a total of six alkoxy groups, is useful as a curing agent (crosslinking agent) for the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention because it has two trifunctional alkoxysilane moieties in one molecule.

[0036] Examples of hydrolyzable organosilane compounds of component (B) include: Bis(trimethoxysilylethenyl)dimethylsilane, Bis(trimethoxysilylethenyl)diethylsilane, Bis(trimethoxysilylethenyl)methylethylsilane, Bis(trimethoxysilylethenyl)methylphenylsilane, Bis(triethoxysilylethenyl)dimethylsilane, Bis(triethoxysilylethenyl)diethylsilane, Bis(triethoxysilylethenyl)methylethylsilane, Bis(triethoxysilylethenyl)methylphenylsilane, Bis(methyldimethoxysilylethenyl)dimethylsilane, Bis(methyldimethoxysilylethenyl)diethylsilane, Bis(methyldimethoxysilylethenyl)methylethylsilane, Bis(methyldimethoxysilylethenyl)methylphenylsilane, Bis(ethyldimethoxysilylethenyl)dimethylsilane, Bis(ethyldimethoxysilylethenyl)diethylsilane, Bis(ethyldimethoxysilylethenyl)methylethylsilane, Bis(ethyldimethoxysilylethenyl)methylphenylsilane, Bis(methyldiethoxysilylethenyl)dimethylsilane, Bis(methyldiethoxysilylethenyl)diethylsilane, Bis(methyldiethoxysilylethenyl)methylethylsilane, Bis(methyldiethoxysilylethenyl)methylphenylsilane, Examples include hydrolyzable organosilane compounds and their partial hydrolysis condensates, which have two trialkoxysilyl-vinylene groups, such as trimethoxysilyl-vinylene groups or triethoxysilyl-vinylene groups, on the same silicon atom in one molecule, or which have two (organo)dimethoxysilyl-vinylene groups, such as (organo)diethoxysilyl-vinylene groups, on the same silicon atom in one molecule.

[0037] (B) Component can use readily available chlorosilanes or hydrosilanes (such as diorganodichlorosilanes or monohydroalkoxysilanes) as starting materials. Specifically, hydrolyzable organosilane compounds having two hydrolyzable silyl-vinylene groups (such as alkoxysilyl-ethenylene groups) on the same silicon atom of component (B) can be easily produced, for example, by hydrosilylation addition of a hydrolyzable group-containing hydrosilane, such as monohydroalkoxysilane, to an organosilane having two ethynyl groups on the same silicon atom, which is derived from diorganodichlorosilane, a commonly used industrial product. This reaction equation can be represented, for example, by the following formula (3-1). [ka] (In the formula, R 6 , R 7 , a is as shown in the general formula (3) above.

[0038] Here, when adding hydrosilanes containing hydrolyzable groups such as monohydroalkoxysilanes, the hydrosilylation addition catalyst used can be a platinum group metal catalyst, such as platinum, palladium, rhodium, or ruthenium catalysts, but platinum-based catalysts are particularly preferred. Examples of platinum-based catalysts include solid platinum supported on platinum black, alumina, silica, or other supports, chloroplatinic acid, alcohol-modified chloroplatinic acid, a complex of chloroplatinic acid with an olefin, or a complex of platinum with a vinylsiloxane. The amount of platinum used can be a so-called catalytic amount; for example, for hydrosilanes containing hydrolyzable groups such as monohydroalkoxysilanes, it can be used in amounts of 0.1 to 1,000 ppm, particularly 0.5 to 100 ppm, in terms of the mass of the platinum group metal. This reaction is generally preferably carried out at a temperature of 50-120°C, particularly 60-100°C, for 0.5-12 hours, especially 1-6 hours. It can be carried out without a solvent, but a suitable solvent such as toluene or xylene may be used as needed, as long as it does not adversely affect the hydrosilylation addition reaction.

[0039] The hydrolyzable organosilane compound and / or its partially hydrolyzed condensate of component (B) may be used alone or in combination of two or more. The amount of component (B) is 0.1 to 30 parts by mass, preferably 0.5 to 25 parts by mass, relative to 100 parts by mass of the total amount of component (A) contained in the first and second agents. If the amount of component (B) is too small, sufficient crosslinking may not be obtained when curing the composition, and if it is too large, the mechanical properties (rubber properties) of the resulting cured product (silicone rubber cured product) will also decrease, which may be economically disadvantageous.

[0040] -(C) component- The curing catalyst of component (C) is used to promote the hydrolysis condensation reaction between the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention and moisture in the air, and is generally referred to as a curing catalyst. A known catalyst commonly used in room-temperature curing silicone resin compositions that cure in the presence of moisture can be used.

[0041] (C) Among the curing catalysts, the nonmetallic organic catalysts are not particularly limited, but those known as curing accelerators for condensation-curing type organopolysiloxane compositions can be used. Examples include phosphazene-containing compounds such as N,N,N',N',N'',N''-hexamethyl-N'''-(trimethylsilylmethyl)-phosphorimidictriamide; amine compounds such as hexylamine and dodecylamine phosphate or their salts; quaternary ammonium salts such as benzyltriethylammonium acetate; dialkylhydroxylamines such as dimethylhydroxylamine and diethylhydroxylamine; silanes and siloxanes containing guanidyl groups such as N,N,N',N'-tetramethylguanidylpropyltrimethoxysilane, N,N,N',N'-tetramethylguanidylpropylmethyldimethoxysilane, and N,N,N',N'-tetramethylguanidylpropyltris(trimethylsiloxy)silane. Furthermore, nonmetallic organic catalysts may be used individually or in combination of two or more types.

[0042] (C) Among the curing catalysts, the metal-based catalyst is not particularly limited, but known curing catalysts for condensation-curing organopolysiloxanes can be used. For example, alkyltin ester compounds such as dibutyltin diacetate, dibutyltin dilaurate, dibutyltin dioctoate, dimethyltin dineodecanoate, dioctyltin dineodecanoate, and di-n-butyl-dimethoxytin; titanate esters or titanium chelate compounds such as tetraisopropoxytitanium, tetra-n-butoxytitanium, tetrakis(2-ethylhexoxy)titanium, dipropoxybis(acetylacetonate)titanium, and titanium isopropoxyoctylene glycol; zinc naphthenate, zinc stearate, zinc-2-ethyloctoate; aluminum isopropylate, aluminum Examples of metal catalysts include aluminum alkoxide compounds such as secondary butyrates; aluminum chelate compounds such as aluminum alkyl acetate diisopropylate and aluminum bisethylacetoacetate monoacetylacetonate; organometallic compounds such as bismuth(III) neodecanoate, bismuth(III) 2-ethylhexanoate, bismuth(III) citrate, bismuth octoate, iron-2-ethylhexoate, cobalt-2-ethylhexoate, manganese-2-ethylhexoate, and cobalt naphthenate; and alkali metal lower fatty acid salts such as potassium acetate, sodium acetate, and lithium oxalate. Metal catalysts are not limited to these. Metal catalysts may be used individually or in combination of two or more.

[0043] The amount of component (C) is 0.001 to 10 parts by mass, particularly 0.005 to 8 parts by mass, and more preferably 0.01 to 5 parts by mass, based on 100 parts by mass of the total amount of component (A) contained in the first and second agents. If the amount is less than 0.001 parts by mass, good curability cannot be obtained, resulting in the problem of a slow curing rate. Conversely, if the amount exceeds 10 parts by mass, the curing rate of the composition is too fast, which may shorten the allowable range of working time after application of the composition or reduce the mechanical properties of the resulting rubber.

[0044] -(D) Component: Filler- Component (D) is a filler (inorganic filler and / or organic resin filler), an optional component that can be added as needed, and is used to provide sufficient mechanical strength to the cured product formed from the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention. Known fillers can be used, for example, wet silica such as fine silica powder, atomized silica, and settling silica, reinforcing silica-based fillers such as silica whose silica surface has been hydrophobized with an organosilicon compound, reinforcing agents such as glass beads, glass balloons, transparent resin beads, silica aerogel, diatomaceous earth, metal oxides such as iron oxide, zinc oxide, titanium oxide, and atomized metal oxides, quartz powder (crystalline silica fine powder), carbon black, talc, zeolite and bentonite, metal carbonates such as asbestos, glass fiber, carbon fiber, calcium carbonate, magnesium carbonate and zinc carbonate, asbestos, glass wool, fine mica powder, molten silica powder (inorganic fillers up to this point), and synthetic resin powders such as polystyrene, polyvinyl chloride and polypropylene. Among these fillers, inorganic fillers such as silica, calcium carbonate, and zeolite are preferred, and fuzzy silica and calcium carbonate with hydrophobic surface treatment are particularly preferred.

[0045] When component (D) is included, the amount included is preferably 0 to 1,000 parts by mass in the first and second agents, respectively, per 100 parts by mass of the total amount of component (A) contained in the first or second agent (however, at least 0.1 parts by mass or more must be contained in either the first or second agent), and more preferably 0 to 500 parts by mass (however, at least 0.1 parts by mass or more must be contained in either the first or second agent). Using more than 1,000 parts by mass will not only increase the viscosity of the composition and worsen its workability, but will also reduce the rubber strength after curing and make it difficult to obtain rubber elasticity. In other words, when component (D) is included, the total amount included in the composition is preferably 0.1 to 2,000 parts by mass, particularly 0.1 to 1,000 parts by mass, per 100 parts by mass of the total amount of component (A) contained in the first and second agents.

[0046] -(E) Ingredient: Adhesion promoter- Component (E) is an adhesion promoter and is an optional component that can be added as needed. It is used to provide sufficient adhesion to the cured product formed from the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention. Known materials are preferably used as adhesion promoters, and examples include silane coupling agents such as functional group-containing hydrolyzable silanes, specifically vinyl silane coupling agents, (meth)acrylic silane coupling agents, epoxy silane coupling agents, amino silane coupling agents (excluding guanidyl group-containing hydrolyzable organosilane compounds), mercaptosilane coupling agents, isocyanate silane coupling agents, and more specifically, vinyl tris(β-methoxyethoxy)silane, γ-methacryloxypropyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, N-β-(aminoethyl)γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, 3-2-(aminoethylamino)propyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, 3-isocyanatetopropyltriethoxysilane, and others. Among these, aminosilanes such as γ-aminopropyltriethoxysilane and N-β-(aminoethyl)γ-aminopropyltrimethoxysilane, epoxysilanes such as γ-glycidoxypropyltrimethoxysilane and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and isocyanatesilanes such as 3-isocyanatetopropyltriethoxysilane are particularly preferred.

[0047] When component (E) is included, the amount included is preferably 0 to 30 parts by mass in each of the first and second agents, relative to 100 parts by mass of the total amount of component (A) contained in the first and second agents (however, at least 0.001 parts by mass or more must be contained in either the first or second agent), and is particularly preferably 0.1 to 20 parts by mass. That is, when component (E) is included, the total amount included in the composition is preferably 0.001 to 60 parts by mass, particularly 0.1 to 40 parts by mass, relative to 100 parts by mass of the total amount of component (A) contained in the first and second agents. If adhesion occurs without the use of an adhesion promoter due to the filler and adherend, it may be omitted.

[0048] -(F) Ingredient: Organopolysiloxane- In addition to the above components (A) to (E), the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention may further contain (F) a linear diorganopolysiloxane represented by the following general formula (4) (so-called non-functional silicone oil) as an optional component, if necessary. [ka] (In general formula (4), R 8 (These are independently unsubstituted or substituted monovalent hydrocarbon groups having 1 to 20 carbon atoms and not containing aliphatic unsaturated bonds, and p is an integer between 1 and 2,000.)

[0049] In the above equation (4), R 8 The unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond has 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, and more preferably 1 to 8 carbon atoms. 8 They may be the same or different from each other. 8Examples of unsubstituted monovalent hydrocarbon groups include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, and eicosyl groups; cycloalkyl groups such as cyclopentyl, cyclohexyl, and cycloheptyl groups; aryl groups such as phenyl, tolyl, xylyl, α-,β-naphthyl, and biphenylyl groups; and aralkyl groups such as benzyl, 2-phenylethyl, 3-phenylpropyl, 2-methyl-2-phenylethyl, and methylbenzyl groups. Furthermore, examples of substituted monovalent hydrocarbon groups include groups in which some or all of the hydrogen atoms of these unsubstituted hydrocarbon groups are substituted with halogen atoms such as F, Cl, Br, or cyano groups, such as 3-chloropropyl group, 3,3,3-trifluoropropyl group, and 2-cyanoethyl group. Among these, methyl, ethyl, and phenyl groups are preferred, and methyl and phenyl groups are more preferred in terms of availability, productivity, and cost. In particular, R 8 Preferably, all of these are methyl groups, and it is preferable that they are dimethylpolysiloxanes in which both ends of the molecular chain are sealed with trimethylsiloxy groups.

[0050] In formula (4), p is a numerical value indicating the degree of polymerization of component (F), and is an integer between 1 and 2,000, with a particular preference being an integer between 2 and 2,000, and a more preferred integer between 20 and 2,000. When p is a numerical value within the above range, the viscosity of the diorganopolysiloxane of component (F) at 23°C is 1.5 to 1,000,000 mPa·s, preferably 30 to 100,000 mPa·s.

[0051] When component (F) is included, the amount included is preferably 0 to 100 parts by mass in the first and second agents, respectively, based on a total of 100 parts by mass of component (A) contained in the first and second agents (however, at least one of the first or second agent contains 0.01 parts by mass or more), and more preferably 10 to 80 parts by mass. That is, when component (F) is included, the total amount included in the composition is preferably 0.01 to 200 parts by mass, particularly 10 to 160 parts by mass, based on a total of 100 parts by mass of component (A) contained in the first and second agents. Having the amount of component (F) within the above range is preferable in that it does not impair the mechanical properties or flame retardancy of the cured product (silicone rubber) of the two-component room-temperature rapidly curing organopolysiloxane composition of the present invention. Furthermore, the viscosity of the composition before curing can be adjusted to be easy to handle during application.

[0052] -Other ingredients- Furthermore, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention preferably contains components (A), (B), and (C) as essential components, and further preferably includes components (D), (E), and (F) as needed. Other known additives that can be added include pigments, dyes, antioxidants, preservatives, antistatic agents, antimony oxide, and flame retardants such as paraffin chloride. In addition, polyethers as thixotropic enhancers, antifungal agents, and antibacterial agents can also be added.

[0053] Furthermore, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention may optionally contain an organic solvent. Examples of organic solvents include aliphatic hydrocarbon compounds such as n-hexane, n-heptane, isooctane, and isododecane; aromatic hydrocarbon compounds such as toluene and xylene; linear siloxanes such as hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and 2-(trimethylsiloxy)-1,1,1,2,3,3,3-heptamethyltrisiloxane; and cyclic siloxanes such as octamethylcyclopentasiloxane and decamethylcyclopentasiloxane. The amount of organic solvent should be adjusted as appropriate within a range that does not hinder the effects of the present invention.

[0054] [Preparation of Room Temperature Rapidly Curing Organopolysiloxane Compositions] The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention comprises a first agent containing a portion of component (A) and all of component (B), and not containing component (C), and a second agent containing the remainder of component (A) and all of component (C), and not containing component (B). The first agent can be prepared by mixing a portion of component (A), all of component (B), and, if necessary, some or all of components (D), (E), (F), and other components, in accordance with conventional methods. The second agent can also be prepared by mixing the remainder of component (A), all of component (C), and, if necessary, the remainder or all of components (D), (E), (F), and other components, in accordance with conventional methods.

[0055] Furthermore, component (A) is incorporated into the first and second agents, and it is preferable that the ratio of the first and second agents is 100:10 to 100:100 by mass, particularly 100:25 to 100:100, in terms of workability and the uniformity (ease of mixing) of the composition when the first and second agents are mixed. In addition, optional components (D), (E), (F) and other components may be incorporated into either the first or second agent, or into one or both, but it is particularly preferable to incorporate components (D), (E), and (F) into the first agent and components (D) and (F) into the second agent.

[0056] The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention allows the first and second components, prepared as described above, to be stored in a moisture-free atmosphere.

[0057] [Method for curing organopolysiloxane compositions that cure rapidly at room temperature] The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention, when mixed in a suitable ratio, specifically, a mass ratio of 1:1 to 10:1 between the first and second components, particularly 1:1 to 4:1, typically cures in 10 minutes to 5 days at room temperature. The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention is rapidly curing, curing in a short time of 10 minutes to 3 days, compared to the usual 3 to 5 days. Furthermore, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention has deep curing properties, curing to its depths in a short time of 30 minutes, compared to the usual 2 hours.

[0058] Furthermore, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention can be cured on the surface of various substrates to form an organopolysiloxane cured layer (silicone rubber layer) that adheres well to the substrate. Here, the substrate is not particularly limited, but various substrates such as metals (aluminum, iron, stainless steel, copper, etc.), organic resins (polycarbonate resin, acrylic resin, epoxy glass (glass epoxy) resin, etc.), and glass can be used.

[0059] [Uses of Room Temperature Rapidly Curing Organopolysiloxane Compositions] The two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention exhibits particularly excellent rapid curing and deep curing properties in air at room temperature, as well as good workability. Furthermore, it possesses storage stability. Therefore, even after long-term storage, for example, 6 months, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention rapidly cures when the first and second components are mixed and exposed to air, exhibiting excellent physical properties. In other words, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention becomes a cured product with excellent heat resistance, water resistance, and moisture resistance. Accordingly, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention is useful as a sealant, coating agent, and adhesive for applications requiring heat resistance, water resistance, and moisture resistance. In particular, it can be effectively used in building applications and electrical and electronic adhesive applications where moisture resistance and water resistance are required. Alternatively, the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention may be cured to form a molded product consisting of a cured product having heat resistance, water resistance, and moisture resistance. Furthermore, the method for using the two-component, room-temperature rapidly curing organopolysiloxane composition of the present invention as a sealant, coating agent, or adhesive may be any conventionally known method. [Examples]

[0060] The following examples and comparative examples illustrate the present invention in detail, but the present invention is not limited to the following examples. Viscosity is measured using a rotational viscometer.

[0061] [Example 1] Preparation of the first agent a 75 parts by mass of dimethylpolysiloxane with a viscosity of 5,000 mPa·s at 23°C and silanol groups (hydroxyl groups bonded to silicon atoms) at both ends of the molecular chain, 15 parts by mass of dimethylpolysiloxane with a viscosity of 700 mPa·s at 23°C and silanol groups at both ends of the molecular chain, and a BET specific surface area of ​​130 m 2 First agent a was prepared by uniformly mixing 8 parts by mass of dry silica (aerosolized silica) at a concentration of / g, 3.5 parts by mass of bis(trimethoxysilylethenyl)dimethylsilane, 2 parts by mass of γ-aminopropyltriethoxysilane, and 2 parts by mass of N-β(aminoethyl)γ-aminopropyltrimethoxysilane under reduced pressure.

[0062] Preparation of the second agent b 75 parts by mass of dimethylpolysiloxane with a viscosity of 5,000 mPa·s at 23°C and silanol groups encapsulated at both ends of the molecular chain, 15 parts by mass of dimethylpolysiloxane with a viscosity of 700 mPa·s at 23°C and silanol groups encapsulated at both ends of the molecular chain, and a BET specific surface area of ​​130 m 2 Second agent b was prepared by uniformly mixing 8 parts by mass of dry silica (atomized silica) at a concentration of / g and 0.1 parts by mass of dimethyltin dineodecanoate under reduced pressure.

[0063] Composition 1 was prepared by uniformly mixing the first agent a and the second agent b in a mixing ratio (mass ratio) of 1:1. Composition 1 was then applied to a substrate to a thickness of 2.5 mm. Subsequently, it was allowed to cure for 1 day and 3 days, respectively, under conditions of 23°C and 50% RH, to obtain cured products 1-1 and 1-2.

[0064] [Example 2] Composition 2 was prepared in the same manner as in Example 1, except that 4.8 parts by mass of bis(methyldimethoxysilylethenyl)dimethylsilane were used instead of bis(trimethoxysilylethenyl)dimethylsilane in the first agent a, and cured products 2-1 and 2-2 were obtained in the same manner.

[0065] [Example 3] Compositions 3-1 and 3-2 were prepared in the same manner as in Example 1, except that 1 part by mass of N,N,N',N'-tetramethylguanidylpropyltrimethoxysilane was used instead of dimethyltin dineodecanoate in the second agent b, and cured product 3 was obtained in the same manner.

[0066] [Comparative Example 1] Compositions 4-1 and 4-2 were prepared in the same manner as in Example 1, except that 2.7 parts by mass of methyltrimethoxysilane were used instead of bis(trimethoxysilylethenyl)dimethylsilane in the first agent a, and cured product 4 was obtained in the same manner.

[0067] [Comparative Example 2] Composition 5 was prepared in the same manner as in Example 1, except that 2.9 parts by mass of vinyltrimethoxysilane were used instead of bis(trimethoxysilylethenyl)dimethylsilane in the first agent a, and cured products 5-1 and 5-2 were obtained in the same manner.

[0068] [Test Method] The compositions prepared in Examples 1-3 and Comparative Examples 1 and 2 were evaluated for curability, rubber properties, and adhesiveness using the methods described below.

[0069] [Curability] The tack-free time (touch-dry time) of each composition prepared in Examples 1-3 and Comparative Examples 1 and 2 was measured according to the method specified in JIS A-5758. Furthermore, the compositions prepared in Examples 1-3 and Comparative Examples 1 and 2 were filled into glass petri dishes with an inner diameter of 10 mm, and the thickness from the surface exposed to air to the hardened portion was measured after 20 minutes at 23°C and 50% RH to evaluate the deep hardening properties.

[0070] [Rubber properties] Each composition prepared in Examples 1-3 and Comparative Examples 1 and 2 was extruded into a 2 mm thick sheet, exposed to air at 23°C and 50% RH, and then left in the same atmosphere for 1 or 3 days. The rubber properties (hardness, elongation at break, tensile strength) of the cured product were measured in accordance with JIS K-6249. Hardness was measured using a durometer A hardness tester according to JIS K-6249.

[0071] [Adhesiveness] Using the compositions prepared in Examples 1-3 and Comparative Examples 1 and 2, aluminum or glass substrates measuring 25 mm in width and 100 mm in length were used to bond the same substrates together, with each test piece having an adhesive area of ​​2.5 mm². 2 Shear adhesion test specimens were prepared by bonding with a bonding thickness of 1 mm, and after curing at 23°C and 50% RH for 1 or 3 days, the shear adhesion strength to aluminum or glass was measured using these test specimens in accordance with the method specified in JIS K-6249.

[0072] The test results for Examples 1-3 are shown in Table 1, and the test results for Comparative Examples 1 and 2 are shown in Table 2.

[0073] [Table 1]

[0074] [Table 2]

[0075] It should be noted that the present invention is not limited to the embodiments described above. The embodiments described above are illustrative, and any configuration that has substantially the same technical idea as described in the claims of the present invention and achieves similar effects is included within the technical scope of the present invention.

Claims

1. (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 100 parts by mass, 【Chemistry 1】 (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 10 or more.) 【Chemistry 2】 (In general formula (2), R 2 R is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond having 1 to 20 carbon atoms, 5 (where x is an independent alkyl group, alkoxyalkyl group, alkenyl group, or acyl group having 1 to 4 carbon atoms, x is an integer from 0 to 2, and m is an integer of 10 or more.) (B) Hydrolyzable organosilane compounds represented by the following general formula (3) and / or partially hydrolyzed condensates thereof: 0.1 to 25 parts by mass per 100 parts by mass of the total of components (A) contained in the first and second agents 【Transformation 3】 (In general formula (3), R 6 R is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 7 (where a is independently an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms, and a is independently an integer from 1 to 3 for each silicon atom.) A first agent containing, (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 10 to 100 parts by mass per 100 parts by mass of component (A) contained in the first agent, 【Chemistry 4】 (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 10 or more.) 【Transformation 5】 (In general formula (2), R 2 is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, R 3 is an oxygen atom or an alkylene group having 1 to 4 carbon atoms, R 4 is independently an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond and has 1 to 20 carbon atoms, R 5 is independently an alkyl group, an alkoxyalkyl group, an alkenyl group or an acyl group having 1 to 4 carbon atoms, x is an integer of 0 to 2, and m is an integer of 10 or more.) (C) Alkyltin ester compound as a curing catalyst: 0.01 to 5 parts by mass per 100 parts by mass of the total of component (A) contained in the first and second agents. A second agent comprising The mixture consists of the following components, and further comprises 0.1 to 500 parts by mass of (D) filler in the first and second components, respectively, with respect to a total of 100 parts by mass of component (A) contained in the first and second components, and 0.1 to 20 parts by mass of (E) silane coupling agent, such as aminosilanes, epoxysilanes, or isocyanatesilanes, contained only in the first component. A two-component, room-temperature rapidly curing organopolysiloxane composition.

2. The two-component room-temperature rapidly curing organopolysiloxane composition according to Claim 1, wherein the amount of component (B) is 0.1 to 2.7 parts by mass with respect to 100 parts by mass of the total amount of component (A) contained in the first and second agents.

3. Furthermore, the two-component room-temperature rapidly curing organopolysiloxane composition according to claim 1 or 2, wherein (F) an organopolysiloxane represented by the following general formula (4) is contained in the first and second components in a total of 100 parts by mass of component (A) contained in the first and second components, in a total of 0 to 100 parts by mass in the first and second components (provided that at least one of the first or second component contains 0.01 parts by mass or more). 【Transformation 6】 (In general formula (4), R 8 (These are independently unsubstituted or substituted monovalent hydrocarbon groups having 1 to 20 carbon atoms and not containing aliphatic unsaturated bonds, and p is an integer from 1 to 2,000.)

4. A two-component, room-temperature rapidly curing organopolysiloxane composition according to any one of claims 1 to 3, wherein the ratio of the first agent to the second agent is 1:1 to 10:1 by mass ratio.

5. A sealant containing a two-component, room-temperature rapidly curing organopolysiloxane composition according to any one of claims 1 to 4.

6. A coating agent containing a two-component, room-temperature rapidly curing organopolysiloxane composition according to any one of claims 1 to 4.

7. An adhesive containing a two-component, room-temperature rapidly curing organopolysiloxane composition according to any one of claims 1 to 4.

8. (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 100 parts by mass, 【Transformation 7】 (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 10 or more.) 【Transformation 8】 (In general formula (2), R 2 R is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond having 1 to 20 carbon atoms, 5 (where x is an independent alkyl group, alkoxyalkyl group, alkenyl group, or acyl group having 1 to 4 carbon atoms, x is an integer from 0 to 2, and m is an integer of 10 or more.) (B) Curing agent: 0.1 to 25 parts by mass per 100 parts by mass of the total of components (A) contained in the first and second agents A first agent containing, (A) Organopolysiloxane represented by the following general formula (1) or (2), having a viscosity of 20 mPa·s or more and 5,000 mPa·s or less at 23°C: 10 to 100 parts by mass per 100 parts by mass of component (A) contained in the first agent, 【Chemistry 9】 (In general formula (1), R 1 (where n is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 10 or more.) 【Chemistry 10】 (In general formula (2), R 2 R is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 3 R is an oxygen atom or an alkylene group having 1 to 4 carbon atoms. 4 R is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond having 1 to 20 carbon atoms, 5 (where x is an independent alkyl group, alkoxyalkyl group, alkenyl group, or acyl group having 1 to 4 carbon atoms, x is an integer from 0 to 2, and m is an integer of 10 or more.) (C) Alkyltin ester compound as a curing catalyst: 0.01 to 5 parts by mass per 100 parts by mass of the total of component (A) contained in the first and second agents. A second agent comprising The mixture consists of the following components, and further comprises 0.1 to 500 parts by mass of (D) filler in the first and second components, respectively, with respect to a total of 100 parts by mass of component (A) contained in the first and second components, and 0.1 to 20 parts by mass of (E) silane coupling agent, such as aminosilanes, epoxysilanes, or isocyanatesilanes, contained only in the first component. In a two-component, room-temperature curable organopolysiloxane composition, A method for improving the deep curing properties of a two-component room-temperature curable organopolysiloxane composition, characterized in that component (B) is a hydrolyzable organosilane compound represented by the following general formula (3) and / or a partially hydrolyzed condensate thereof, wherein the first agent and the second agent are mixed, exposed to air at 23°C and 50% RH, and the thickness from the surface portion exposed to air to the cured portion after 20 minutes is 0.65 mm or more. 【Chemistry 11】 (In general formula (3), R 6 R is independently an unsubstituted or substituted monovalent hydrocarbon group having 1 to 20 carbon atoms. 7 (where a is independently an unsubstituted or substituted alkyl group having 1 to 20 carbon atoms, or an unsubstituted or substituted cycloalkyl group having 3 to 20 carbon atoms, and a is independently an integer from 1 to 3 for each silicon atom.)

9. A method for improving the deep curing properties of a two-component room-temperature curable organopolysiloxane composition according to Claim 8, wherein the amount of component (B) is 0.1 to 2.7 parts by mass with respect to 100 parts by mass of the total amount of component (A) contained in the first and second agents.

10. Furthermore, a method for improving the deep curing properties of a two-component room-temperature curable organopolysiloxane composition according to claim 8 or 9, wherein (F) an organopolysiloxane represented by the following general formula (4) is contained in the first agent and the second agent in a total of 100 parts by mass of component (A) contained in the first agent and the second agent in a total of 0 to 100 parts by mass each (provided that at least one of the first agent or the second agent contains 0.01 parts by mass or more). 【Chemistry 12】 (In general formula (4), R 8 (These are independently unsubstituted or substituted monovalent hydrocarbon groups having 1 to 20 carbon atoms and not containing aliphatic unsaturated bonds, and p is an integer from 1 to 2,000.)

11. A two-component, room-temperature rapidly curing organopolysiloxane composition according to any one of claims 8 to 10, wherein the ratio of the first agent to the second agent is 1:1 to 10:1 by mass.

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