Composition and film

Abstract

The first problem of the present invention is to provide a composition having excellent waterstop performance, embeddability, and retainability in the embedded state. A second problem of the present invention is to provide a film using the composition. The composition of the present invention comprises: a polyurethane formed from a polyol comprising a polyoxyalkylene structure and a polyisocyanate; and particles having an Ask C-type hardness of 5 or less, a ratio of a loss modulus G ''to a storage modulus G 'at a temperature of 25 DEG C, a frequency of 1 Hz, and a strain of 0.1% of 0.400 or more, and a ratio of a storage modulus G' at a temperature of 25 DEG C, a frequency of 1 Hz, and a strain of 10% to a storage modulus G 'at a temperature of 25 DEG C, a frequency of 1 Hz, and a strain of 0.1% of less than 0.900.

Description

TECHNICAL FIELD

[0001] The present application relates to a composition and a film. BACKGROUND

[0002] In order to reduce the damage of water immersion or water leakage, various water stopping techniques have been studied.

[0003] As a water stopping technique, a method of covering the inlet or outlet of water with a water stopping material can be cited. Water immersion damage of a building is caused, for example, by water flowing in from a gap present in a window or a door, etc. For such water immersion damage, a method of using a water stopping material to seal the gap to inhibit water intrusion is effective.

[0004] Specifically, for example, a water stopping material using a water absorbent composition that absorbs water to stop water when water comes into contact with the water absorbent composition disposed in the intrusion path of water has been studied.

[0005] As a water stopping material as described above, for example, a water stopping material composed of a material containing a water absorbent resin in a flexible polyurethane foam body of independent foaming ratio of 15% or more, and having a hardness of 70 or less after pressurization for 5 minutes by an Asker C-type hardness meter is disclosed in Patent Literature 1.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT LITERATURE

[0008] Patent Literature 1: Japanese Patent Application Laid-Open No. 63-036341 SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] In recent years, the demand for a water stopping material that can be easily used for various shaped parts has been increasing, and it is required that the water stopping performance and the embeddability of a composition used in such a water stopping material are excellent. In the present specification, the embeddability refers to the property of being able to be embedded into a corner without a gap. Furthermore, it is also required that the composition is able to maintain the embedded state after being embedded into a corner.

[0011] The present inventors have studied the composition described in Patent Literature 1, and as a result, it has been found that there is room for improvement in terms of seeking a balance among the water stopping performance, the embeddability, and the maintenance of the embedded state.

[0012] Therefore, the object of the present application is to provide a composition excellent in the water stopping performance, the embeddability, and the maintenance of the embedded state.

[0013] Furthermore, the object of the present application is also to provide a film using the above-described composition.

[0014] Means for solving technical problems

[0015] The present inventors have conducted intensive studies in order to solve the above problems, and as a result, have found that the problems can be solved by the following structure.

[0016] (1) A composition comprising:

[0017] a polyurethane formed from a polyol containing a polyoxyalkylene structure and a polyisocyanate; and

[0018] particles,

[0019] an Asker C hardness of 5 or less,

[0020] a ratio of a loss modulus G" to a storage modulus G' of 0.400 or more at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1%,

[0021] a ratio of a storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 10% to a storage modulus G' at a temperature of 25°C, a frequency of 1 Hz, and a strain of 0.1% of less than 0.900.

[0022] (2) The composition according to (1), wherein an equivalent ratio of isocyanate groups of the polyisocyanate to hydroxyl groups of the polyol is 0.75 to 0.79.

[0023] (3) The composition according to (1) or (2), wherein the content of the particles is 41 mass% or more with respect to the total mass of the composition.

[0024] (4) The composition according to any one of (1) to (3), wherein the average particle diameter of the particles is 10 μm or more.

[0025] (5) The composition according to any one of (1) to (4), wherein the water content of the particles is 5 mass% or more.

[0026] (6) The composition according to any one of (1) to (5), wherein the Asker C hardness is 0.

[0027] (7) The composition according to any one of (1) to (6) for use in a water stop application.

[0028] (8) A film having: a base material layer; and a composition layer formed from the composition according to any one of (1) to (7).

[0029] (9) The film according to (8), wherein the side of the composition layer opposite to the side of the base material layer further has an adhesive layer.

[0030] Effects of the invention

[0031] According to the present application, it is possible to provide a composition which is excellent in water stopping performance, embeddability, and maintenance of the embedded state.

[0032] Also, according to the present application, it is possible to provide a film using the above-mentioned composition. DETAILED DESCRIPTION

[0033] In the present specification, a numerical range represented by "~" means a range including a lower limit value and an upper limit value recited before and after "~".

[0034] Also, in the present specification, in the case where two or more kinds of a component are present, the "content" of the component means the total content of these two or more kinds of components.

[0035] In the present specification, in a numerically recited range, a lower limit value or an upper limit value recited in a certain numerical range can be replaced with a lower limit value or an upper limit value of another numerically recited range. Also, in the numerical range recited in the present specification, a lower limit value or an upper limit value recited in a certain numerical range can be replaced with a value shown in the examples.

[0036] In the present specification, a more preferable mode is a combination of two or more kinds of the preferable modes.

[0037] In the present specification, "(meth)acrylic acid" means a concept including either one or both of acrylic acid and methacrylic acid, "(meth)acrylate" means a concept including either one or both of acrylate and methacrylate, and the same applies to the terms of "(meth)acryl group" and "(meth)acryloxy group".

[0038] Also, in the present specification, an "organic group" means a group containing at least one carbon atom.

[0039] In the present specification, weight average molecular weight (Mw), number average molecular weight (Mn), and dispersity (also referred to as "molecular weight distribution." (Mw / Mn)) are defined as polystyrene conversion values obtained by GPC measurement (solvent: tetrahydrofuran, flow rate (sample injection amount): 10 μL, column: TSK gel Multipore HXL-M (manufactured by TOSOH CORPORATION), column temperature: 40°C, flow rate: 1.0 mL / minute, detector: differential refractive index detector) using a GPC (Gel Permeation Chromatography) device (HLC-8120 GPC, manufactured by TOSOH CORPORATION).

[0040] Unless otherwise specified, all physical property measurements in this instruction manual shall be performed at 25°C. Furthermore, unless otherwise specified, the test object shall be placed in the test environment (25°C) for at least 12 hours before the measurement is performed.

[0041] [Composition]

[0042] The compositions of the present invention will now be described in detail.

[0043] The composition of the present invention (hereinafter also simply referred to as the "composition") comprises: a polyurethane (hereinafter also referred to as the "specific polyol") formed from a polyol comprising a polyoxyalkylene structure (hereinafter also referred to as the "specific polyol") and a polyisocyanate; and

[0044] particle,

[0045] Ascar C type has a hardness of 5 or less.

[0046] Under conditions of 25℃, 1Hz frequency, and 0.1% strain, the ratio of loss modulus G'' to storage modulus G' (G'' / G', tanδ) is greater than 0.400.

[0047] The ratio of the storage modulus G' (hereinafter also referred to as "G'10%)" under the conditions of 25℃, 1Hz, and 10% strain to the storage modulus G' (hereinafter also referred to as "G'0.1%) under the conditions of 25℃, 1Hz, and 0.1% strain (G'10% / G'0.1%, hereinafter also referred to as "G' ratio") is less than 0.900.

[0048] The reason why the composition having the above structure can solve the problem of the present invention is not clear, but the inventors speculate as follows.

[0049] Furthermore, based on the following speculation, there is no limitation on the mechanism by which the effect can be achieved. In other words, even situations where the effect is achieved through mechanisms other than those described below are included within the scope of this invention.

[0050] The compositions of the present invention exhibit excellent water-swellable properties by containing specific polyurethanes, resulting in rapid water absorption and swelling upon contact with water, thus providing excellent waterproofing performance. Furthermore, the compositions of the present invention possess plastic deformability by containing particles, with an Ascar C-type hardness of 5 or less and a tanδ of 0.400 or more, thereby allowing for flexible deformation during application and excellent embedding properties. Moreover, the compositions of the present invention, with a G' ratio of less than 0.900, are less prone to rebound forces after application, effectively maintaining their embedded state.

[0051] Hereinafter, the statement that the composition is superior in at least one of the water-stopping properties, embedding properties, and embedding maintenance properties is also referred to as "superior effect of the present invention".

[0052] The following provides a detailed description of the components that the composition may contain and the properties of the composition.

[0053] [Specific polyurethane]

[0054] The composition contains a specific polyurethane. The specific polyurethane is a polyurethane formed from a polyol containing a polyoxyalkylene structure (the specific polyol) and a polyisocyanate. In other words, the specific polyurethane is a reaction product of the specific polyol and the polyisocyanate.

[0055] From the viewpoint that the composition readily satisfies the specified physical properties, the equivalent ratio of the isocyanate group (NCO group) of the polyisocyanate to the hydroxyl group (OH group) of the specific polyol is preferably 0.50 to 1.00, more preferably 0.70 to 0.90, even more preferably 0.75 to 0.80, and particularly preferably 0.75 to 0.79.

[0056] From the viewpoint of preventing the dissolution of the composition, a particular polyurethane preferably has a cross-linked structure.

[0057] The aforementioned crosslinking structure can be either physical or chemical crosslinking, but from a durability point of view, chemical crosslinking is preferred. That is, a particular polyurethane preferably has a three-dimensional crosslinking structure formed by covalent bonds.

[0058] (Specific polyols)

[0059] The specific polyol is a polyol compound containing a polyoxyalkylene structure.

[0060] There is no limitation on the number of hydroxyl groups in a particular polyol as long as it has two or more, preferably three or more, more preferably three or four, and even more preferably three.

[0061] From the viewpoint of achieving excellent composition flexibility and superior effects of the present invention, the molecular weight of a specific polyol is preferably 1000 to 10000, more preferably 2000 to 8000, and even more preferably 3000 to 6000. Furthermore, when the specific polyol has a molecular weight distribution, the number average molecular weight preferably satisfies the above-mentioned range.

[0062] The polyoxyalkylene structure is -(O-AL). n - The structural part represented.

[0063] AL represents alkylene. Alkylene can be any of the following: linear, branched, and cyclic, preferably linear or branched, and more preferably linear.

[0064] The number of carbon atoms in the alkylene group represented by AL is preferably 1 to 6, more preferably 2 to 4, even more preferably 2 or 3, and especially preferably 2.

[0065] Specific examples of alkylene groups represented by AL include methylene, ethylene, and propenyl (specifically, n-propenyl and 2-methylvinyl), preferably ethylene or 2-methylvinyl, more preferably ethylene.

[0066] n represents the number of repetitions. The number of repetitions represented by n can be any number greater than 2, for example, preferably 2 to 300, more preferably 10 to 200, even more preferably 15 to 100, and especially preferably 20 to 50.

[0067] In a polyoxyalkylene structure, there can be one or more alkyl groups (ALs). Furthermore, a particular polyol may have only one polyoxyalkylene structure within its molecule, or it may have two or more.

[0068] Furthermore, from the viewpoint that a particular polyurethane has excellent water swelling properties and superior water-stopping performance, the polyoxyalkylene structure preferably includes oxyethylene structural units.

[0069] From the viewpoint that the specific polyol exhibits excellent water swelling properties and superior waterproofing performance, the content of the oxyethylene structural unit in the molecule, relative to all oxyalkylene structural units in the molecule, is preferably 30 mol% or more, more preferably 50 mol% or more, further preferably 60 mol% or more, particularly preferably 65 mol% or more, and most preferably 70 mol% or more. Furthermore, the upper limit is 100 mol% or less.

[0070] As a specific polyol, a polyoxyalkylene polyol obtained by polymerizing an epoxy compound containing at least ethylene oxide using a low-molecular-weight polyol as an initiator is preferred.

[0071] Examples of low molecular weight polyols include ethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, 1,2-butanediol and diethylene glycol, as well as low molecular weight triols such as glycerol and trimethylolpropane, with low molecular weight triols being preferred.

[0072] Examples of the aforementioned epoxy compounds include, in addition to ethylene oxide, propylene oxide, butane oxide, and tetrahydrofuran.

[0073] From the viewpoint of achieving better results in this invention, a compound represented by the following formula (PO1) is preferred as a specific polyol.

[0074] M 1 -[(O-AL)] n -OH] mFormula (PO1)

[0075] In formula (PO1), M 1 Indicates the linking group with a valence of m. AL represents alkylene. n is the repetition number, indicating a number greater than or equal to 2. m represents an integer greater than or equal to 2.

[0076] As M 1 The aforementioned m-valent linking groups are not particularly limited. For example, m-valent aliphatic groups and m-valent aromatic groups can be cited, with m-valent aliphatic groups being preferred.

[0077] Examples of aliphatic groups with an m-valence include m-valent aliphatic hydrocarbon groups and groups in which one or more carbon atoms of an m-valent aliphatic hydrocarbon group are replaced by heteroatoms, with m-valent aliphatic hydrocarbon groups being preferred. Examples of heteroatoms include oxygen atoms, nitrogen atoms, and sulfur atoms, with oxygen atoms being preferred.

[0078] The number of carbon atoms in the m-valent linking group is preferably 1 to 20, more preferably 3 to 12, further preferably 3 to 6, especially preferably 3 or 4, and most preferably 3.

[0079] AL represents alkylene. Alkylene can be any of the following: linear, branched, and cyclic, preferably linear or branched, and more preferably linear.

[0080] The number of carbon atoms in the alkylene group represented by AL is preferably 1 to 6, more preferably 2 to 4, even more preferably 2 or 3, and especially preferably 2.

[0081] Specific examples of alkylene groups represented by AL include methylene, ethylene, and propenyl (specifically, n-propenyl and 2-methylvinyl), preferably ethylene or 2-methylvinyl, more preferably ethylene.

[0082] AL can be one type or two or more types.

[0083] n represents the number of repetitions. The number of repetitions represented by n can be any number greater than 2, for example, preferably 2 to 300, more preferably 10 to 200, even more preferably 15 to 100, and especially preferably 20 to 50.

[0084] As for the structure represented by -(O-AL)n- in formula (PO1), it is also preferred to be -(O-C2H4)n. A -(O-C3H6)n B - The structure represented. n A and n B This represents a repeated number, and each number above 2 can be represented independently. As n A and n BThe total number is preferably 2 to 300, more preferably 10 to 200, even more preferably 15 to 100, and especially preferably 20 to 50.

[0085] m represents an integer greater than or equal to 2, preferably an integer from 2 to 8, more preferably 3 or 4, and even more preferably 3.

[0086] In the compound represented by formula (PO1), from the viewpoint of excellent water swelling properties and superior waterproofing performance of a specific polyurethane, the content of oxyethylene structural units (structural units represented by -O-C2H4- in the molecule) relative to all oxyalkylene structural units (the total number of oxyalkylene structural units represented by -O-AL- in the molecule) is preferably 30 mol% or more, more preferably 50 mol% or more, further preferably 60 mol% or more, particularly preferably 65 mol% or more, and most preferably 70 mol% or more. Furthermore, the upper limit is 100 mol% or less.

[0087] For example, specific polyols such as SANNIX FA103 (manufactured by Sanyo Chemical Industries, Ltd., a trifunctional polyol containing a polyoxyalkylene structure and having an oxyethylene structural unit content of 70 mol% relative to all oxyalkylene structural units in the molecule), NEWPOL 80-4000 (manufactured by Sanyo Chemical Industries, Ltd., a difunctional polyol containing a polyoxyalkylene structure and having an oxyethylene structural unit content of 80 mol% relative to all oxyalkylene structural units in the molecule), NEWPOL PE-64 (manufactured by Sanyo Chemical Industries, Ltd., a difunctional polyol containing a polyoxyalkylene structure and having an oxyethylene structural unit content of 40 mol% relative to all oxyalkylene structural units in the molecule), and SANNIX FA195 (manufactured by Sanyo Chemical Industries, Ltd., a trifunctional polyol containing a polyoxyalkylene structure and having an oxyethylene structural unit content of 70 mol% relative to all oxyalkylene structural units in the molecule) can be used.

[0088] A specific polyol can be used alone or in combination of two or more.

[0089] The content of a structure derived from a specific polyol in a specific polyurethane is preferably 20 to 45% by mass relative to the total mass of the composition, more preferably 20 to 40% by mass, and even more preferably 25 to 40% by mass.

[0090] (Polyisocyanates)

[0091] Polyisocyanates are compounds having two or more isocyanate groups (NCO groups). The number of isocyanate groups in a polyisocyanate is not particularly limited as long as it has two or more, but is preferably three to six, and more preferably three.

[0092] The molecular weight of the polyisocyanate is preferably 100 to 1000, more preferably 150 to 500, and even more preferably 200 to 300. When the polyisocyanate has a molecular weight distribution, the number average molecular weight preferably meets the above range.

[0093] As polyisocyanates, known polyisocyanates can be used, such as chain aliphatic polyisocyanates, alicyclic polyisocyanates, and aromatic polyisocyanates, as well as their complexes. As the aforementioned complexes, isocyanurate bodies, biuret bodies, urethane bodies, and adducts can be included.

[0094] Examples of the aforementioned chain-like aliphatic polyisocyanates include, for example, linear aliphatic diisocyanates such as methylene diisocyanate, ethylene diisocyanate, propylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate (HDI), heptamethylene diisocyanate, octamethylene diisocyanate, nonamethylene diisocyanate, and decamethylene diisocyanate, as well as branched aliphatic diisocyanates such as trimethylhexamethylene diisocyanate.

[0095] Examples of the aforementioned alicyclic polyisocyanates include isophorone diisocyanate (IPDI), 4,4-dicyclohexylmethane diisocyanate, 1,4-cyclohexane diisocyanate, and hydrogenated toluene diisocyanate.

[0096] Examples of the aforementioned aromatic polyisocyanates include, for example, 4,4'-diphenylmethane diisocyanate (MDI), 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 1,5-naphthalene diisocyanate, para- or meta-phenylene diisocyanate, xylene diisocyanate, m-tetramethylxylene diisocyanate, toluene diisocyanate (TDI), benzene diisocyanate, toluene diamine diisocyanate, xylene diisocyanate, naphthalene diisocyanate, toluene triisocyanate, benzene triisocyanate, bianisidine diisocyanate, 4,4'-diphenyl ether diisocyanate, and 4,4',4”-triphenylmethane triisocyanate.

[0097] As a polyisocyanate, a complex of linear aliphatic diisocyanate or triisocyanate is preferred, and a complex of HDI is more preferred.

[0098] As polyisocyanates, for example, Duranate D101, Duranate D201, Duranate TKA-100, Duranate E402-100, Duranate AE700-100 and Duranate TUL-100 (all manufactured by ASAHI KASEICORPORATION) can be used.

[0099] Polyisocyanates can be used alone or in combination of two or more.

[0100] The content of the structure derived from polyisocyanate in a particular polyurethane is preferably 1 to 10% by mass, more preferably 1 to 5% by mass, and even more preferably 2 to 4% by mass, relative to the total mass of the composition.

[0101] Furthermore, the mass ratio of the structure derived from the polyisocyanate to the structure derived from the specific polyol in the specific polyurethane is preferably 0.01 to 0.20, more preferably 0.05 to 0.15, and even more preferably 0.05 to 0.11.

[0102] A specific polyurethane can be used alone or in combination of two or more types.

[0103] The content of a specific polyurethane relative to the total mass of the composition is preferably 20 to 50% by mass, more preferably 20 to 40% by mass, even more preferably 20 to 35% by mass, and especially preferably 20 to 32% by mass.

[0104] 〔particle〕

[0105] The composition contains particles. The composition exhibits plastic deformation properties by containing particles.

[0106] The shape of the particles is not particularly limited; for example, spherical, polygonal, scaly, flat, and irregular shapes can be included.

[0107] From the viewpoint that the composition easily satisfies the specified physical properties, the average particle size is preferably 1 μm or more, more preferably 5 μm or more, and even more preferably 10 μm or more. There is no particular limitation on the upper limit, but for example, 100 μm or less is preferred, and 50 μm or less is more preferred.

[0108] The average particle size can be determined by measuring the particle size of any 10 particles in the field of view during SEM (Scanning Electron Microscope) observation, and then using the arithmetic mean of the measured values.

[0109] Furthermore, from the viewpoint that the composition readily satisfies the specified physical properties, aqueous particles are preferred as particles. The water content of the particles is preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and particularly preferably 10% by mass or more. As an upper limit, it is preferably 15% by mass or less, more preferably 12% by mass or less.

[0110] The moisture content (%) of the particles can be calculated based on the mass change before and after heating when 1g of particles are weighed in an aluminum cup and heated at 105°C for 4 hours in an oven.

[0111] Furthermore, when the particles are starch particles, there is a tendency for the composition to have lower Ascar C hardness as the moisture content increases. When the particles are starch particles, the moisture content is preferably 10% by mass or more.

[0112] As a particle, it can be either an organic particle or an inorganic particle, preferably an organic particle.

[0113] As organic particles, resin particles are preferred, and polysaccharide particles are more preferred.

[0114] Starch particles can be cited as an example of polysaccharide particles. Examples of starch particles include corn starch, potato starch, wheat starch, tapioca starch, waxy corn starch, rice starch, and sweet potato starch.

[0115] Furthermore, starch particles can be chemically modified. Examples of modification methods for obtaining modified starch particles include esterification such as acetylation, etherification such as carboxylation, phosphorylation, oxidation, sulfation, phosphoric acid crosslinking, adipic acid crosslinking, enzyme treatment, hydrothermal treatment, and combinations thereof, with phosphoric acid crosslinking and / or hydrothermal treatment being preferred. The starch particles can also be crosslinked. Crosslinking methods are not particularly limited; for example, crosslinking methods using crosslinking agents, crosslinking methods using radiation (e.g., gamma rays, X-rays, and electron beams), and / or thermal crosslinking methods can be cited.

[0116] One type of particle can be used alone, or two or more types can be used in combination.

[0117] From the viewpoint that the composition readily satisfies the specified physical properties, the lower limit of the particle content relative to the total mass of the composition is preferably 25% by mass or more, more preferably 30% by mass or more, and even more preferably 41% by mass or more. From the viewpoint that the composition readily satisfies the specified physical properties, the upper limit of the particle content relative to the total mass of the composition is preferably 70% by mass or less, more preferably 60% by mass or less, and even more preferably 55% by mass or less.

[0118] As a preferred range of particle content, from the viewpoint that the composition can easily meet the specified physical properties, it is preferably 25 to 70% by mass relative to the total mass of the composition, more preferably 25 to 60% by mass, even more preferably 30 to 55% by mass, and especially preferably 41 to 55% by mass.

[0119] 〔catalyst〕

[0120] The composition may contain a catalyst (preferably an addition polymerization catalyst) for the synthesis of a specific polyurethane.

[0121] As the aforementioned catalyst, known catalysts can be used, such as organometallic compounds and tertiary amine compounds. Specifically, for example, organotin catalysts such as dibutyltin dilaurate and dibutyltin dioctanoate, organolead catalysts such as lead octanoate, and tertiary amine compounds such as triethylenediamine, N,N'-dimethylhexamethylenediamine, and N,N'-dimethylbutanediamine can be used.

[0122] One type of catalyst can be used alone, or two or more types can be used in combination.

[0123] The content of the catalyst relative to the total mass of the composition is preferably 0.01 to 1.0% by mass, more preferably 0.05 to 0.3% by mass.

[0124] [Plasticizer]

[0125] From the viewpoint that the specified physical properties of the composition are readily available, the composition preferably contains a plasticizer.

[0126] Plasticizers are also preferably non-crosslinked.

[0127] The plasticizer is not particularly limited as long as it is compatible with a specific polyurethane. From the viewpoint of easily obtaining the specified physical properties of the composition, polyether ester plasticizers are preferred.

[0128] Examples of polyether ester plasticizers include organic esters of polyalkylene glycols and compounds represented by the following formula (PP1).

[0129] Examples of the aforementioned polyalkylene glycols include polyethylene glycol, polypropylene glycol, polybutane glycol, poly(ethylene oxide-propylene oxide) block copolymers, poly(ethylene oxide-propylene oxide) random copolymers, and polytetramethylene glycol. Furthermore, the polyether chain may contain aromatic units such as bisphenols.

[0130] Examples of the organic acids mentioned above include monocarboxylic acids (e.g., benzoic acid, butyric acid, isobutyric acid, 2-ethylbutyric acid, 2-ethylhexanoic acid, and decanoic acid).

[0131] R 1 -(O-AL)p -O-CO-R 2 Formula (PP1)

[0132] In formula (PP1), R 1 Represents a hydrogen atom or a monovalent organic group. R 2 This indicates a monovalent organic group. AL indicates an alkylene group. p indicates an integer greater than 2.

[0133] As R 1 Examples of monovalent organic groups include alkyl, aryl, aralkyl, and acyl groups.

[0134] The alkyl group can be any of the following: straight-chain, branched, or cyclic. The number of carbon atoms in the alkyl group is preferably 1 to 20, more preferably 1 to 18, and even more preferably 1 to 10.

[0135] Aryl groups can be categorized by the number of carbon atoms from 6 to 18. Aryl groups can be either monocyclic or polycyclic.

[0136] Examples of aralkyl groups include those in which one hydrogen atom of the alkyl group is replaced by an aryl group. The number of carbon atoms in an aralkyl group is preferably 7 to 18. Examples of aralkyl groups include benzyl and phenethyl.

[0137] Examples of acyl groups include alkyl carbonyl groups and aryl carbonyl groups.

[0138] The alkyl moiety in the alkyl carbonyl group can be any of the following: linear, branched, or cyclic. The number of carbon atoms in the alkyl carbonyl group is preferably 2 to 20, more preferably 2 to 18, and even more preferably 2 to 10.

[0139] The aryl moiety in an aryl carbonyl group can be either monocyclic or polycyclic, and examples include aryl groups with 6 to 18 carbon atoms.

[0140] As R 2 Examples of monovalent organic groups represented include alkyl, aryl, and aralkyl groups. Examples of alkyl, aryl, and aralkyl groups related to the above-mentioned R group include... 2 The alkyl, aryl, and aralkyl groups represented are the same as those in the alkyl group.

[0141] AL represents alkylene. Alkylene can be any of the following: linear, branched, and cyclic, preferably linear or branched, and more preferably linear.

[0142] The number of carbon atoms in the alkylene group represented by AL is preferably 1 to 6, more preferably 2 to 4, even more preferably 2 or 3, and especially preferably 2.

[0143] Specific examples of alkylene groups represented by AL include methylene, ethylene, and propenyl (specifically, n-propenyl and 2-methylvinyl), preferably ethylene or 2-methylvinyl, more preferably ethylene.

[0144] AL can be one type or two or more types.

[0145] p represents the number of repetitions. The number of repetitions represented by p can be any number greater than 2, for example, preferably 2 to 50, more preferably 3 to 10, and even more preferably 4 to 5.

[0146] Commercially available polyether ester plasticizers include, for example, SANFLEX EB-200 and SANFLEX EB-400 manufactured by Sanyo Chemical Industries, Ltd., and ADK CIZER RS-1000, RS-735 and RS-700 manufactured by ADEKA CORPORATION.

[0147] Plasticizers can be used alone or in combination of two or more.

[0148] The content of plasticizer relative to the total mass of the composition is preferably 15 to 40% by mass, more preferably 15 to 35% by mass, and even more preferably 20 to 35% by mass.

[0149] [Other ingredients]

[0150] The composition may contain other ingredients besides those mentioned above.

[0151] Other components include, for example, adhesive components that may be included in the adhesive layer as described later, resins other than specific polyurethanes, polymerization initiators, pigments, and crosslinking agents.

[0152] [Properties of the Composition]

[0153] <Ascar C-type hardness>

[0154] The composition has an Ascar C hardness of 5 or less, and from the viewpoint of achieving better results in this invention, it is preferably 3 or less, more preferably 2 or less, and even more preferably 1 or less. The lower limit is 0.

[0155] Ascar C-type hardness can be measured using an Ascar C-type testing machine (Ascar rubber hardness tester C-type, manufactured by KOBUNSHIKEIKI CO.,LTD.) at a test temperature of 25°C, according to the method of JIS K 7312. Furthermore, the Ascar C-type hardness test should be performed after the test object has been placed in the test environment (25°C) for at least 12 hours.

[0156] <Viscoelastic Properties>

[0157] The composition has a tanδ of 0.400 or higher under the conditions of 25°C, 1Hz, and 0.1% strain. From the viewpoint of achieving better results in this invention, it is preferably 0.500 or higher, more preferably 0.550 or higher, and even more preferably 0.600 or higher. The upper limit is not particularly limited, but it is often below 1.000, and preferably below 0.800.

[0158] The tanδ of the composition under conditions of 25°C, 1Hz, and 0.1% strain can be calculated based on the values ​​of the storage modulus G' and loss modulus G'' obtained by strain dispersion measurement at 0.001–100% strain using a rheometer (MCR302, manufactured by Anton Paar GmbH) at 25°C and 1Hz. Furthermore, the strain dispersion measurement was performed after the test object had been placed in the test environment (25°C) for at least 12 hours.

[0159] The storage modulus G' of the composition under the conditions of 25°C, 1Hz frequency, and 0.1% strain is preferably 500-50000Pa, more preferably 1000-30000Pa, and even more preferably 1000-20000Pa.

[0160] The loss modulus G'' of the composition under the conditions of 25°C, 1Hz frequency, and 0.1% strain is preferably 500-50000Pa, more preferably 1000-30000Pa, even more preferably 1000-20000Pa, and especially preferably 1000-12000Pa.

[0161] The aforementioned energy storage modulus G' and loss modulus G'' are obtained using the same method as the aforementioned tanδ.

[0162] The ratio (G' ratio) of the storage modulus G' of the composition at 25°C, 1Hz, and 10% strain to that at 25°C, 1Hz, and 0.1% strain is less than 0.900. From the viewpoint of achieving better results in this invention, it is preferably 0.700 or less, and more preferably 0.600 or less. The lower limit is not particularly limited, but it is often 0.100 or more, preferably 0.200 or more, and more preferably 0.400 or more.

[0163] The storage modulus G' under the strain of 0.1% was obtained using the same method as tanδ. Furthermore, the storage modulus G' under the strain of 10% was obtained using the same method as tanδ, based on the value of the storage modulus G' under the strain of 10%.

[0164] From the viewpoint of water-stopping performance and durability, the water absorption rate of the composition is preferably 1.1 to 5.0, more preferably 2.0 to 4.0, and even more preferably 2.0 to 3.0.

[0165] The water absorption rate mentioned above is the water absorption rate after 1 hour, which can be calculated by dividing the mass of the composition immersed in water adjusted to 25°C for 1 hour by the mass of the composition before immersion.

[0166] [Method for manufacturing the composition]

[0167] The method of manufacturing the composition is not particularly limited and can be manufactured by known methods.

[0168] For example, a method can be described as mixing raw materials (specific polyols and polyisocyanates), particles, plasticizers, and any other components (e.g., catalysts, pigments) of a specific polyurethane and polymerizing the specific polyurethane to manufacture a composition.

[0169] The above mixing can be carried out in the atmosphere or in an inert gas atmosphere. Furthermore, the mixing can be carried out at normal pressure or under reduced pressure.

[0170] When polymerizing specific polyurethanes, polymerization treatments such as heat treatment and light irradiation treatment can be performed as needed.

[0171] One or more of the raw materials, mixtures, and compositions formed before mixing can be dried as needed.

[0172] [use]

[0173] The uses of the compositions of the present invention are not particularly limited, but they are preferably used for waterproofing. As a waterproofing method, they can be used to prevent or reduce water leakage.

[0174] There are no particular restrictions on how the composition is used for waterproofing purposes. The composition can be applied directly to the waterproofing area or used as a film as described later.

[0175] Furthermore, the compositions of the present invention can also be used as agricultural water-retaining materials. For example, by directly distributing the compositions in farmland or covering the soil with the film described later, the frequency of watering crops can be reduced.

[0176] [film]

[0177] The film of the present invention comprises a substrate layer and a composition layer that is a layer of the above-described composition.

[0178] [Substrate layer]

[0179] The material of the substrate that constitutes the substrate layer is not particularly limited; resin is an example.

[0180] Examples of resins mentioned above include cellulose, polyester, synthetic fibers, polyolefins, poly(meth)acrylate, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), cyclic olefin polymers (COP), and acrylonitrile / butadiene / styrene copolymers (ABS).

[0181] From a construction point of view, the substrate is preferably flexible.

[0182] The substrate may contain fibers. Examples of fibers include cellulose fibers, synthetic fibers, polyolefin fibers, and polyester fibers. Nonwoven fabrics, cloth, or paper are preferred as the fiber-containing substrate, with nonwoven fabrics being more preferred.

[0183] The thickness of the substrate layer is not particularly limited, for example, it is 15 to 200 μm.

[0184] In addition, the substrate can function as an adhesive layer with adhesive properties or bonding.

[0185] [Composition Layer]

[0186] The film comprises a composition layer that is a layer of the above-described composition.

[0187] The method of forming the composition layer is not particularly limited. For example, methods such as attaching the composition to a substrate and forming the composition layer by coating the composition onto a substrate can be cited.

[0188] The composition for forming the above-mentioned composition layer is not particularly limited. For example, compositions containing raw materials of a specific polyurethane (specific polyols and polyisocyanates), particles, plasticizers, and other arbitrary components (e.g., catalysts, pigments) as needed can be included. After the composition for forming the composition layer is disposed on a substrate, polymerization treatment (e.g., heat treatment and light irradiation treatment, etc.) can be performed as needed.

[0189] The thickness of the composition layer is preferably 100–5000 μm, more preferably 1000–2000 μm.

[0190] [Adhesive layer]

[0191] The film preferably has an adhesive layer on the side of the composition layer opposite to the substrate layer.

[0192] The aforementioned adhesive layer is a layer that functions as both adhesive and bonding to components (e.g., glass, resin, metal, and ceramics). By having an adhesive layer, the film can be easily maintained at the waterproofing point.

[0193] The adhesive layer is preferably a water-absorbing adhesive layer. A water-absorbing adhesive layer is a layer that absorbs water when in contact with water, thereby exerting or increasing its adhesiveness or bonding strength. By using a water-absorbing adhesive layer, excellent adhesion can be maintained even in water-soaked areas, making it extremely convenient to use the film as a waterproof membrane.

[0194] As components of the adhesive layer, known adhesives and binders can be used, such as vinyl resins, silicones, poly(meth)acrylates, polyurethanes, polyamides, polyesters, polyolefins, and rubbers.

[0195] Examples of vinyl resins include polyvinyl alcohol and polyvinylpyrrolidone.

[0196] Examples of silicones include addition-reaction silicones, peroxide-cured silicones, and condensation-reaction silicones.

[0197] Examples of poly(meth)acrylates include, for example, homopolymers of (meth)acrylate monomers and copolymers of acrylate monomers with other monomers. Examples of acrylate monomers include, for example, methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, and glycidyl methacrylate. Examples of other monomers include, for example, vinyl acetate, (meth)acrylonitrile, (meth)acrylamide, styrene, methacrylic acid, acrylic acid, itaconic acid, hydroxymethylacrylamide, and maleic anhydride.

[0198] Examples of polyurethanes include polyester polyurethanes and polycarbonate polyurethanes.

[0199] Examples of polyamides include polyamide 11, which is a polyamide formed by ring-opening polycondensation of undecanolactam, and polyamide 12, which is a polyamide formed by ring-opening polycondensation of laurolactam.

[0200] Polyesters include, for example, condensation polymers of polycarboxylic acids and polyols, specifically polyethylene terephthalate and polybutylene terephthalate.

[0201] Examples of polyolefins include homopolymers of olefins and copolymers of olefins with other monomers. Olefins with 2 to 6 carbon atoms are preferred. Examples of olefins include ethylene, propylene, butene, methylpentene, and hexene. Examples of copolymers of olefins with other monomers include EVA (ethylene-vinyl acetate copolymer), EAA (ethylene-acrylic acid copolymer), EEA (ethylene-ethyl acrylate copolymer), and EMMA (ethylene-methyl methacrylate copolymer).

[0202] Examples of rubbers include styrene / butadiene copolymers (SBR, SBS), styrene / isoprene copolymers (SIS), acrylonitrile-butadiene copolymers (NBR), chloroprene polymers, and isobutylene / isoprene copolymers (butyl rubber).

[0203] From the viewpoint of excellent water absorption and adhesion, the adhesive layer preferably contains vinyl resin, and more preferably polyvinyl alcohol.

[0204] The method for forming the adhesive layer is not particularly limited; for example, it can be formed by coating an adhesive layer forming composition onto a composition layer. After coating the adhesive layer forming composition, drying and heat treatment can be performed as needed.

[0205] The adhesive layer forming composition may contain other components besides those described above. Examples of other components include, for instance, solvents, ultraviolet absorbers, antioxidants, crosslinking agents, surfactants, fillers, colorants, light stabilizers, thickeners, and polymerization initiators.

[0206] The thickness of the adhesive layer is, for example, 10–500 μm.

[0207] The film is preferably used as a waterproofing film. Furthermore, the film with an adhesive layer can be used as a waterproofing tape.

[0208] The method of using the film is not particularly limited; for example, a method in which the film is disposed on an object with the object and the film composition layer facing each other. The object is not particularly limited; examples include buildings, and more specifically, areas containing gaps such as windows and doors. By disposing the film on the areas with such gaps, the composition that comes into contact with water entering through the gaps swells and blocks the gaps, thus preventing water from entering.

[0209] Example

[0210] The present invention will now be described in further detail with reference to embodiments. The materials, amounts, proportions, processing contents, and processing steps shown in the following embodiments can be appropriately modified without departing from the spirit of the invention. Therefore, the scope of the present invention should not be interpreted as limited by the embodiments shown below.

[0211] [Example 1]

[0212] [Preparation of the composition and fabrication of the thin film]

[0213] In a 300 mL stirring container (product name "002 stirring container", manufactured by KINKI YOKI CO.,LTD.), the ingredients listed in Table 1 were mixed to obtain 100 g of the mixture.

[0214] The mixture was placed in a mixer (product name "ARV-310", manufactured by THINKY CORPORATION) and subjected to depressurized stirring for 1 minute at a speed of 900 rpm (revolutions per minute) and a pressure of 3 kPa.

[0215] 18g of the mixture after vacuum stirring was poured into a flat-bottomed glass petri dish (7cm φ inner diameter) and left to stand at 25°C for 24 hours. Then, the composition was removed from the flat-bottomed glass petri dish, yielding a cylindrical composition sample A with a diameter of approximately 7cm and a height of approximately 4mm.

[0216] In addition, the mixture after vacuum stirring was poured into an acrylic resin container measuring 50 mm in length, 100 mm in width, and 2 mm in height. After standing at 25°C for 2 hours, a non-woven fabric (substrate, KURASEAL M) cut to 50 mm in length and 100 mm in width was attached to the mixture and left to stand at 25°C for more than 22 hours. Then, the laminate with the composition layer on the substrate layer was removed from the acrylic resin container, and a PVA film (made by Solvron PT40_AICELLO CORPORATION) cut to approximately 50 mm in length and 100 mm in width was attached to the side of the composition layer opposite to the substrate layer, resulting in a film sample B with a substrate layer, a composition layer, and an adhesive layer, measuring approximately 50 mm in length, 100 mm in width, and 2 mm in height.

[0217] [Determination of physical properties]

[0218] <Determination of Ascar C-type Hardness>

[0219] The Ascar C-type hardness of the prepared composition sample A was measured at 25°C using an Ascar rubber hardness tester (manufactured by KOBUNSHI KEIKI CO.,LTD.). The Ascar C-type hardness measurement was performed after the prepared composition sample A was placed in a test environment at 25°C for at least 12 hours.

[0220] <Determination of storage modulus G', storage modulus G'' and tanδ>

[0221] Using a rheometer (MCR302, Anton Paar GmbH), strain dispersion measurements were performed on the prepared composition sample A at strains ranging from 0.001% to 100% under the following conditions: temperature: 25°C, frequency: 1Hz, Nf = 1N, and measuring plate: PP25. Based on the obtained values ​​of storage modulus G' and loss modulus G'' at 0.1% strain, tanδ was calculated at 25°C, 1Hz, and 0.1% strain. These strain dispersion measurements were performed after the prepared composition sample A was placed in a 25°C test environment for at least 12 hours.

[0222] <Determination of G' ratio>

[0223] Strain dispersion measurements of the prepared composition sample A were performed using a rheometer (MCR302, manufactured by Anton Paar GmbH) at a temperature of 25°C, a frequency of 1Hz, Nf=1N, and a PP25 measuring plate, with strains ranging from 0.001% to 100%. These strain dispersion measurements were performed after the prepared composition sample A was placed in the test environment at 25°C for at least 12 hours. Based on the obtained storage modulus G' at 0.1% strain and 10% strain, the G' ratio (storage modulus G' at 10% strain / storage modulus G' at 0.1% strain) was calculated at 25°C and a frequency of 1Hz.

[0224] [Examples 2-4, 7, 8; Comparative Examples 1-7]

[0225] The composition and dosage were adjusted to those shown in Table 1. Except for this, the preparation of the composition, the fabrication of the film, and the determination of the physical properties were carried out in the same manner as in Example 1.

[0226] [Example 5]

[0227] When preparing film sample B, the process of attaching a PVA film (made by Solvron PT40_AICELLO CORPORATION) to the side of the composition layer opposite to the substrate was not performed. Otherwise, the composition preparation, film fabrication, and property determination were carried out in the same manner as in Example 1.

[0228] [Example 6]

[0229] In preparing film sample B, the process of attaching nonwoven fabric (substrate, KURASEAL M) to the mixture was not performed. Otherwise, the composition preparation, film fabrication, and property determination were carried out using the same steps as in Example 1.

[0230] [Various ingredients]

[0231] The components shown in Table 1 are explained below.

[0232] [Polyols]

[0233] • "EXCENOL 840" (manufactured by AGC Inc.: a trifunctional polyol containing a polyoxyalkylene structure with an oxyethylene structural unit content of 15 mol% relative to all oxyalkylene structural units in the molecule.)

[0234] • "SANNIX FA-103" (manufactured by Sanyo Chemical Industries, Ltd. A trifunctional polyol containing a polyoxyalkylene structure with an oxyethylene structural unit content of 70 mol% relative to all oxyalkylene structural units in the molecule.)

[0235] [Polyisocyanates]

[0236] • "Duranate TKA-100" (manufactured by ASAHI KASEI CORPORATION, a trifunctional polyisocyanate)

[0237] [Plasticizer]

[0238] • "SANFLEX EB-200" (manufactured by Sanyo Chemical Industries, Ltd., a plasticizer with a polyoxyethylene structure)

[0239] • Diisononyl phthalate (manufactured by FUJIFILM Wako Pure Chemical Corporation)

[0240] 〔catalyst〕

[0241] • Dibutyltin dilaurate (manufactured by FUJIFILM Wako Pure Chemical Corporation)

[0242] 〔particle〕

[0243] • Corn starch (manufactured by FUJIFILM Wako Pure Chemical Corporation. Corn starch, average particle size 15μm, moisture content 12% by mass)

[0244] ·Fine Snow (manufactured by Joetsu Starch Co., Ltd. Rice starch, average particle size 5μm, moisture content 10% by mass)

[0245] • Calcium carbonate (manufactured by FUJIFILM Wako Pure Chemical Corporation. Average particle size 4 μm, moisture content 0% by mass)

[0246] <Determination of Particle Size>

[0247] The particles were observed using SEM, and the particle size of any 10 particles within the field of view was measured. The arithmetic mean of the obtained measurements was calculated and used as the average particle size.

[0248] <Determination of Moisture Content in Particles>

[0249] Weigh 1g of particles into an aluminum cup and heat them in an oven at 105℃ for 4 hours. Calculate the moisture content (%) based on the mass change before and after heating. Specifically, calculate the moisture content using the following formula.

[0250] Moisture content (%) = (Mass of particles before heating - Mass of particles after heating) / Mass of particles before heating

[0251] [evaluate]

[0252] [Water-stopping performance]

[0253] Following the preparation steps of sample A, a composition sample C with dimensions of 60 mm in length, 60 mm in width, and a film thickness of 2 mm was prepared. The composition sample C was immersed in distilled water adjusted to 25°C, and the mass before immersion and the mass after 1 hour of immersion were measured. The water absorption rate was calculated according to the following formula.

[0254] Water absorption rate = Mass of composition sample C after 1 hour of immersion / Mass of composition sample C before immersion

[0255] Based on the obtained water absorption rate, the water-stopping performance was evaluated according to the following evaluation criteria. The faster the water absorption rate, the more rapidly the composition swells, and the better the water-stopping performance. A water-stopping performance of B or higher is preferred for practical applications.

[0256] <Evaluation Criteria>

[0257] A: Water absorption rate is above 2.0.

[0258] B: Water absorption rate is 1.1 or higher and less than 2.0.

[0259] C: Water absorption rate is less than 1.1

[0260] [Embeddedness]

[0261] An acrylic resin test water tank, 300mm wide, 300mm deep, and 700mm high, with a 90° angle between its wall and bottom surfaces, was prepared. A 50mm wide and 10mm high through hole was provided on the lower inner wall of one of the test water tanks, at the position where it contacts the inner bottom surface.

[0262] On the inner wall of the test water tank, a film sample B, immersed in water for 1 second and wetted, is attached to the inner wall and bottom surface of the test water tank in a direction approximately parallel to the width direction (50 mm) of the hole, with the film sample B covering the entire surface of the hole. At this time, the side of the film sample B removed from the acrylic resin container is attached opposite the inner wall of the test water tank.

[0263] The intersection of the inner wall and the inner bottom surface of the test water tank was visually confirmed. Based on the presence and extent of the gap between the test water tank and the film sample B, the embedding performance was evaluated according to the following evaluation criteria. In practice, an embedding performance rating of B or higher is preferred.

[0264] <Evaluation Criteria>

[0265] A: No gap is generated between the test water tank and the membrane.

[0266] B: A gap of less than 1 mm is created between the test water tank and the membrane.

[0267] C: A gap of more than 1 mm is created between the test water tank and the membrane.

[0268] [Embedding Maintenance]

[0269] After performing the above embedding evaluation, the gap was re-confirmed one hour later, and the maintainability of the gap was visually verified. The embedding maintenance was evaluated according to the following criteria. In practice, an embedding evaluation of B or higher is preferred.

[0270] <Evaluation Criteria>

[0271] A: No gap is generated between the test water tank and the membrane.

[0272] B: A gap of less than 1 mm is created between the test water tank and the membrane.

[0273] C: A gap of more than 1 mm is created between the test water tank and the membrane.

[0274] [Workability on wet surfaces]

[0275] An acrylic resin test water tank, 300 mm wide, 300 mm deep, and 700 mm high, with a 90° angle between the wall and bottom surfaces, was prepared. After filling the tank with water, film sample B was attached to the inner surface of the tank in the water, and its wet-surface workability was evaluated according to the following evaluation criteria. In terms of processing, the film preferably exhibits wet-surface workability.

[0276] A: Can be attached

[0277] B: Cannot be attached

[0278] [Adhesiveness]

[0279] The tactile evaluation of the substrate-side surface of film sample B was conducted, and the adhesion was evaluated according to the following evaluation criteria. Furthermore, in cases where the film sample does not have a substrate, the surface of the composition layer opposite to the adhesive layer is considered the substrate-side surface. Ideally, the substrate-side surface of the film should not have adhesive properties.

[0280] A: Non-adhesive

[0281] B: It has adhesive properties.

[0282] [result]

[0283] The composition, physical properties, and evaluation results of the composition are shown in Table 1 below.

[0284] In Table 1, “G’ (Pa)” represents the storage modulus G’ (Pa) under the conditions of 25℃ temperature, 1Hz frequency and 0.1% strain, “G’’ (Pa)” represents the loss modulus G’’ (Pa) under the conditions of 25℃ temperature, 1Hz frequency and 0.1% strain, and “tanδ (G’’ / G’)” represents the ratio (tanδ) of the loss modulus G’’ to the storage modulus G’ under the conditions of 25℃ temperature, 1Hz frequency and 0.1% strain.

[0285] In Table 1, “G’ ratio (G’10% / G’0.1%)” represents the ratio of the energy storage modulus G’ under the conditions of 25℃, 1Hz frequency and 10% strain to the energy storage modulus G’ under the conditions of 25℃, 1Hz frequency and 0.1% strain.

[0286] In Table 1, “NCO / OH” represents the equivalence ratio of the isocyanate group (NCO) of the polyisocyanate to the hydroxyl group (OH) of the polyol.

[0287] In Table 1, the values ​​recorded in each component column are the content (parts by mass) in the composition.

[0288] [Table 1]

[0289]

[0290] [Table 2]

[0291]

[0292] According to Table 1, the composition of the present invention is confirmed to have excellent water-stopping properties, embedding properties, and embedding maintenance.

[0293] Furthermore, based on the comparison between Examples 1 and 2 and Examples 3 and 4, it was confirmed that when the particle content is 41% by mass or more relative to the total mass of the composition, the embedding maintenance is more excellent.

[0294] Furthermore, based on a comparison between Example 2 and Example 7, it was confirmed that when the average particle size is 10 μm or more, the embedding performance is superior.

[0295] Furthermore, based on the comparison between Example 2 and Example 8, it was confirmed that when the equivalent ratio (NCO / OH) of polyol to isocyanate is 0.75 to 0.79, the intercalation performance is better.

[0296] Furthermore, based on a comparison of Examples 3 and 5, it was confirmed that when the film has an adhesive layer, the wet surface workability is superior.

[0297] Furthermore, based on the comparison between Example 3 and Example 6, it was confirmed that when the film has a substrate, adhesion on the back side is further suppressed.

Claims

1. A composition comprising: Polyurethanes formed from polyols containing polyoxyalkylene structures and polyisocyanates; and particle, The Ascar C type hardness of this composition is below 5. Under conditions of 25℃, 1Hz frequency, and 0.1% strain, the ratio of loss modulus G'' to storage modulus G' is greater than 0.

400. The ratio of the energy storage modulus G' under the conditions of 25℃, 1Hz frequency, and 10% strain to the energy storage modulus G' under the conditions of 25℃, 1Hz frequency, and 0.1% strain is less than 0.

900.

2. The composition according to claim 1, wherein, The isocyanate group of the polyisocyanate has an equivalent ratio of 0.75 to 0.79 to the hydroxyl group of the polyol.

3. The composition according to claim 1 or 2, wherein, The content of the particles is 41% by mass or more relative to the total mass of the composition.

4. The composition according to claim 1 or 2, wherein, The average particle size is greater than 10 μm.

5. The composition according to claim 1 or 2, wherein, The particles have a water content of 5% by mass or more.

6. The composition according to claim 1 or 2, wherein, Ascar C type has a hardness of 0.

7. The composition according to claim 1 or 2, for use in waterproofing applications.

8. A thin film comprising: a substrate layer; and a composition layer formed of the composition of claim 1 or 2.

9. The film according to claim 8, further comprising an adhesive layer on the side of the composition layer opposite to the substrate layer side.

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