WO2014061344A1 - 屋外タンク用防水シート及びその施工方法 - Google Patents
屋外タンク用防水シート及びその施工方法 Download PDFInfo
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- WO2014061344A1 WO2014061344A1 PCT/JP2013/072084 JP2013072084W WO2014061344A1 WO 2014061344 A1 WO2014061344 A1 WO 2014061344A1 JP 2013072084 W JP2013072084 W JP 2013072084W WO 2014061344 A1 WO2014061344 A1 WO 2014061344A1
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- waterproof sheet
- waterproof
- adhesive layer
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/665—Sheets or foils impervious to water and water vapor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6809—Reverse side strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7126—Containers; Packaging elements or accessories, Packages large, e.g. for bulk storage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/712—Weather resistant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/006—Presence of polysiloxane in the substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31652—Of asbestos
- Y10T428/31663—As siloxane, silicone or silane
Definitions
- the present invention relates to a waterproof sheet and a waterproof sheet that are effectively used to prevent intrusion of rainwater into the boundary between the bottom side and the base of a large tank that is often installed in an outdoor tank, particularly a refinery. It relates to the construction method.
- the present invention has been made in view of the above circumstances, and can be used without causing deterioration of physical properties over a long period of time, and has a waterproof property over a long period of time, at a boundary portion between an outdoor tank and a base portion. It aims at providing the waterproof sheet and waterproof construction method suitable for arrangement
- the present invention provides the following waterproof sheet and a waterproof construction method using the waterproof sheet.
- the base rubber has a JIS-A hardness of 15 to 90, a tensile strength of 3 MPa or more, an elongation of 100 to 800%,
- a waterproof sheet comprising a silicone rubber having a crescent tear strength of 3 kN / m or more.
- a waterproof construction method for an outdoor tank characterized by densely covering.
- a plurality of waterproof sheets are juxtaposed to cover the boundary portion in a liquid-tight manner, and adjacent waterproof sheets are laminated in a liquid-tight manner with a width of the overlapping portion being 5 mm or more [7].
- the waterproof construction method of the outdoor tank as described.
- the waterproof sheet of the present invention can be used without causing deterioration of physical properties over a long period of time, and can provide a waterproof sheet having waterproof properties over a long period of time.
- a waterproof sheet that can withstand long-term use can be obtained.
- the bottom side of the outdoor tank can be reliably waterproofed by a simple construction method.
- FIG. 6 is a partially omitted cross-sectional view showing a further embodiment of the waterproof construction method according to the present invention, in a state where the outer peripheral edge of the waterproof sheet is bonded with a sealing material.
- the waterproof sheet of the present invention is formed by laminating an adhesive layer on one side of a base rubber.
- a cover film is detachably laminated on the adhesive layer, and the cover film is peeled off at the time of use. It is to be attached to a place.
- FIG. 1 shows an embodiment of such a waterproof sheet 40, wherein 1 is a base rubber, 2 is an adhesive layer, and 3 is a cover film.
- silicone rubber is used in terms of heat resistance, weather resistance, and cold resistance.
- Silicone rubber has a hardness of 15 to 90 according to JIS K 6249, a durometer A hardness meter, a tensile strength of 3 MPa or more, an elongation of 100 to 800%, and a crescent tear strength of 3 kN / m or more. It is necessary to use the silicone rubber which is the above in view of elasticity and rubber strength, as well as workability during construction and durability after construction. These rubber characteristics and sheet characteristics are combined, and if the hardness, tensile strength, elongation, and tear strength are out of the above ranges, problems occur during or after construction. That is, when the hardness is low and the elongation is large, the sheet is likely to be deformed, causing problems that the pasting operation at the time of construction is difficult to perform and that the sheet is easily displaced after being pasted.
- JIS K 6249 is defined in the test method for uncured and cured silicone rubber, and is composed of each cited standard, and the hardness is according to durometer type A defined in JIS K 6253.
- the hardness of the base rubber of the waterproof sheet of the present invention is 15 to 90, more preferably 20 to 85, and still more preferably 25 to 80.
- Tensile strength and elongation are according to the test method specified in JIS K 6251.
- the tensile strength of the base rubber is 3 MPa or more, more preferably 4 MPa or more, and still more preferably 5 MPa or more.
- the elongation is from 100 to 800%, more preferably from 150 to 750%, still more preferably from 200 to 700%.
- the tear strength is based on the test method specified in JIS K 6252. For the purpose of the present invention, it is considered that the stress on the sheet caused by the unevenness of the construction surface causes damage to the sheet surface such as cutting and tearing. Is desirable.
- the crescent tear strength is 3 kN / m or more, more preferably 5 kN / m, and still more preferably 7 kN / m or more.
- the silicone rubber composition may be any curable type as long as it provides the above physical properties, but is an addition (hydrosilylation) reaction curable type silicone rubber composition from the point that molding can be performed in a short time by heating. Alternatively, those obtained from an organic peroxide curable silicone rubber composition are preferred.
- This addition reaction curable silicone rubber composition comprises an alkenyl group-containing organopolysiloxane having two or more alkenyl groups represented by vinyl groups in one molecule, and an organo having two or more, preferably three or more SiH groups.
- Hydrogen polysiloxane (usually in an amount such that the molar ratio of SiH groups to alkenyl groups is 0.5 to 4) and a platinum group metal addition reaction catalyst represented by platinum or a platinum compound (usually alkenyl group-containing organopolysiloxane) Those containing 1 to 1,000 ppm of platinum group metal with respect to siloxane are used.
- an organic peroxide curable silicone rubber composition an organopolysiloxane having two or more alkenyl groups in one molecule is cured with an organic peroxide as a curing agent (usually in 100 parts by mass of the organopolysiloxane). (1 to 10 parts by mass) is used.
- the organic peroxide is not particularly limited, but acyl-based organic peroxides such as para-methylbenzoyl peroxide and ortho-methylbenzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2, Examples thereof include alkyl organic peroxides typified by 5-bis (tertiary butyl peroxy) hexane, percarbonate organic peroxides, peroxyketal organic peroxides, and the like.
- silicone rubber composition examples include KE-541-U and KE-1990-50 manufactured by Shin-Etsu Chemical Co., Ltd., which are organic peroxides.
- product-curable silicone rubber composition KE-971-U, KE-675-U, etc. manufactured by Shin-Etsu Chemical Co., Ltd. are used.
- the adhesive layer is composed of an adhesive silicone resin or silicone gel.
- an adhesive silicone resin or silicone gel is composed of an adhesive silicone resin or silicone gel.
- the pressure-sensitive adhesive layer is preferably formed from a cured product of an addition-curable silicone rubber composition containing the following components (A) to (D) and having a cured product having surface adhesiveness.
- A an organopolysiloxane containing an alkenyl group bonded to at least two silicon atoms in one molecule;
- B R 3 SiO 1/2 unit (wherein R is an unsubstituted or substituted monovalent hydrocarbon group, but R contains an alkenyl group) and a resinous material mainly composed of SiO 2 unit Polymer,
- C an organohydrogenpolysiloxane containing at least two hydrogen atoms (SiH groups) bonded to silicon atoms in one molecule;
- D Addition reaction catalyst
- this addition-curable silicone rubber composition may be further prepared from (E) R ′ 3 SiO 1/2 unit (where R ′ is an unsubstituted or substituted monovalent hydrocarbon, if necessary).
- R ′ contains a resinous copo
- the component (A) of the addition curable silicone rubber composition is an organopolysiloxane having at least two alkenyl groups on average in one molecule, and the organopolysiloxane of the component (A) includes the following average composition formula: (1) R 1 a SiO (4-a) / 2 (1) What is shown by is used.
- R 1 is an unsubstituted or substituted monovalent hydrocarbon group having the same or different carbon number of 1 to 10, preferably 1 to 8, and a is 1.5 to 2.8, preferably 1. It is a positive number in the range of 8 to 2.5, more preferably 1.95 to 2.05.
- examples of the unsubstituted or substituted monovalent hydrocarbon group bonded to the silicon atom represented by R 1 include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group, Pentyl group, neopentyl group, hexyl group, cyclohexyl group, octyl group, nonyl group, alkyl group such as decyl group, aryl group such as phenyl group, tolyl group, xylyl group, naphthyl group, benzyl group, phenylethyl group, phenylpropyl Aralkyl groups such as groups, vinyl groups, allyl groups, propenyl groups, isopropenyl groups, butenyl groups, hexenyl groups, cyclohexenyl groups, octeny
- halogen atoms such as bromine, chlorine, cyano groups, etc., such as chloromethyl group, chloropro Group, bromoethyl group, trifluoropropyl group, but cyanoethyl group and the like,
- at least 90 mol% of all R 1 is a methyl group.
- R 1 must be alkenyl groups (preferably having 2 to 8 carbon atoms, more preferably 2 to 6 carbon atoms).
- the alkenyl group content is 0.0001 to 20 mol%, preferably 0.001 to 10 mol% in the total organic group (that is, the above-mentioned unsubstituted or substituted monovalent hydrocarbon group) R 1 .
- the content is preferably 0.01 to 5 mol%.
- This alkenyl group may be bonded to a silicon atom at the end of the molecular chain, or may be bonded to a silicon atom in the middle of the molecular chain, or may be bonded to both. Those containing bonded alkenyl groups are preferred.
- the degree of polymerization is not particularly limited and may be from liquid to raw rubber at normal temperature.
- the average degree of polymerization in terms of polystyrene by gel permeation chromatography (GPC) is 50 to 20,000, preferably 100. Those having a molecular weight of about 10,000, more preferably about 100 to 2,000 are preferably used.
- the structure of this organopolysiloxane is basically composed of a repeating main chain consisting of diorganosiloxane units (R 1 2 SiO 2/2 ), and both ends of the molecular chain are triorganosiloxy groups (R 1 3 SiO 1 / 2 ) or a linear structure blocked with a hydroxydiorganosiloxy group ((HO) R 1 2 SiO 1/2 ), but may be partially a branched structure, a cyclic structure, or the like.
- the resinous copolymer (that is, a copolymer having a three-dimensional network structure) as the component (B) has R 3 SiO 1/2 units and SiO 2 units as main components.
- R is an unsubstituted or substituted monovalent hydrocarbon group, preferably having 1 to 10 carbon atoms, particularly 1 to 8 carbon atoms.
- Examples of the monovalent hydrocarbon group represented by R include a methyl group, an ethyl group, and the like.
- halogen atoms such as fluorine, bromine and chlorine, cyano groups, etc.
- Those conversion such as chloromethyl group, chloropropyl group, bromoethyl group, trifluoropropyl group, cyanoethyl group and the like.
- the resinous copolymer of the component (B) may be composed of only the R 3 SiO 1/2 unit and the SiO 2 unit, and if necessary, the R 2 SiO unit or the RSiO 3/2 unit ( R may be included in a total amount of these as described above) in a range of 50% or less, preferably 40% or less, based on the total copolymer mass, but R 3 SiO 1/2 units and SiO 2 units
- the molar ratio [R 3 SiO 1/2 / SiO 2 ] is preferably 0.5 to 1.5, particularly preferably 0.5 to 1.3. Even if this molar ratio is smaller than 0.5 or larger than 1.5, sufficient rubber hardness / strength cannot be obtained.
- the resinous copolymer of component (B) preferably has at least two alkenyl groups in one molecule, and the content of alkenyl groups is 0.0001 mol / g or more, preferably 0.0001. Is in the range of 0.0002 to 0.002 mol / g. If the alkenyl group content is less than 0.0001 mol / g, sufficient rubber physical properties cannot be obtained, and if it is more than 0.003 mol / g, the hardness may be too high and the adhesive strength may decrease. is there.
- the resinous copolymer may be a liquid (for example, 10 mPa ⁇ s or more, preferably 50 mPa ⁇ s or more) having fluidity at room temperature (25 ° C.) or a solid having no fluidity.
- This resinous copolymer can be usually produced by hydrolyzing an appropriate chlorosilane or alkoxysilane by a method well known in the art.
- the blending amount of the above components (A) and (B) is 20 to 100 parts by weight, particularly 30 to 90 parts by weight when the total of the components (A) and (B) is 100 parts by weight.
- the component (B) is 0 to 80 parts by mass, particularly 10 to 70 parts by mass. If the amount of component (A) is too small, the rubber elasticity will be lost and brittle, and if it is too large, the tackiness and strength will be insufficient. When there are too many (B) components, adhesiveness will also fall and a rubber physical property will also fall remarkably.
- a resinous copolymer of component (E) in addition to the resinous copolymer of component (B), a resinous copolymer of component (E) can be further blended as necessary.
- the resinous copolymer of component (E) (that is, a copolymer having a three-dimensional network structure) has R ′ 3 SiO 1/2 units and SiO 2 units as main components.
- R ′ is an unsubstituted or substituted monovalent hydrocarbon group, preferably having 1 to 10 carbon atoms, particularly 1 to 8 carbon atoms, and examples of the monovalent hydrocarbon group represented by R ′ include a methyl group, Alkyl groups such as ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, cyclohexyl, octyl, nonyl, decyl, phenyl, tolyl Aryl groups such as xylyl group and naphthyl group, aralkyl groups such as benzyl group, phenylethyl group and phenylpropyl group, vinyl group, allyl group, propenyl group, isopropenyl group, butenyl group, hexenyl group, cyclohexenyl group, octen
- the resinous copolymer of component (E) may be composed of only the above R ′ 3 SiO 1/2 unit and SiO 2 unit, and if necessary, R ′ 2 SiO unit or R′SiO 3 / 2 units (R 'above street of) the total amount of these with respect to the total copolymer mass, 50% or less, and preferably may comprise from 40% or less, R' 3 SiO 1/2
- the molar ratio of units to SiO 2 units [R ′ 3 SiO 1/2 / SiO 2 ] is preferably 0.5 to 1.5, particularly preferably 0.5 to 1.3. Even if this molar ratio is smaller than 0.5 or larger than 1.5, the tackiness is lowered.
- the resinous copolymer of component (E) has an alkenyl group content of less than 0.0001 mol / g (ie, 0 to 0.0001 mol / g), preferably 0.00005 mol / g or less ( That is, 0 to 0.00005 mol / g), and more preferably no alkenyl group. If the alkenyl group is contained in an amount of more than 0.0001 mol / g, sufficient adhesive strength cannot be obtained.
- the resinous copolymer may be a liquid that is fluid at room temperature (for example, 25 ° C.) or a solid that is not fluid. However, the resinous copolymer may be solid at room temperature in terms of stickiness of the cured product. preferable.
- This resinous copolymer can be usually produced by hydrolyzing an appropriate chlorosilane or alkoxysilane by a method well known in the art.
- the blending amount is preferably 0 to 400 parts by weight, particularly preferably 0 to 300 parts by weight, with respect to 100 parts by weight as the total amount of the components (A) and (B).
- the blending amount is preferably 0 to 400 parts by weight, particularly preferably 0 to 300 parts by weight, with respect to 100 parts by weight as the total amount of the components (A) and (B).
- the content of the alkenyl group in the total of the resinous copolymer of the component (B) and the resinous copolymer of the component (E) is 0.00001 to 0 from the viewpoint of rubber properties and adhesiveness. It is preferably 0.002 mol / g, particularly 0.00005 to 0.001 mol / g.
- the component (C) is an organohydrogenpolysiloxane having at least 2, preferably 3 or more hydrogen atoms (SiH groups) bonded to silicon atoms, and the SiH group in the molecule is the above (A). It crosslinks with the alkenyl group bonded to the silicon atom in the component, the component (B) and the component (E) by a hydrosilylation addition reaction and acts as a curing agent for curing the composition.
- the organohydrogenpolysiloxane of component (C) has the following average composition formula (2) R 2 b H c SiO (4-bc) / 2 (2) (Wherein R 2 is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, b is 0.7 to 2.1, c is 0.001 to 1.0, and b + c is a positive number satisfying 0.8 to 3.0.)
- a compound having at least 2 (usually 2 to 200), preferably 3 to 100, more preferably 3 to 50 silicon atom-bonded hydrogen atoms in one molecule is preferably used.
- examples of the monovalent hydrocarbon group for R 2 include the same groups as those exemplified for R 1 , but those having no aliphatic unsaturated group are preferred.
- b is preferably 0.8 to 2.0
- c is preferably 0.01 to 1.0
- b + c is preferably 1.0 to 2.5.
- the molecular structure of the organohydrogenpolysiloxane is: The structure may be any of linear, cyclic, branched, and three-dimensional network. In this case, the number of silicon atoms in one molecule (or the degree of polymerization) is preferably 2 to 300, particularly about 4 to 150 at room temperature (25 ° C.) and liquid.
- bonded with a silicon atom may be located in any of the molecular chain terminal and the middle of a molecular chain, and may be located in both.
- a resinous copolymer having R ′′ 2 HSiO 1/2 units and SiO 2 units as main components, or R ′ A resinous copolymer mainly composed of ' 2 HSiO 1/2 units, R ′′ 3 SiO 1/2 units and SiO 2 units can be used.
- R ′′ is an unsubstituted or substituted monovalent hydrocarbon group, and examples thereof are the same as those of R ′, and those not containing an alkenyl group are preferable.
- the resinous copolymer may consist of only R ′′ 2 HSiO 1/2 units or R ′′ 2 HSiO 1/2 units, R ′′ 3 SiO 1/2 units and SiO 2 units, If necessary, R ′′ HSiO 2/2 units, R ′′ 2 SiO 2/2 units, HSiO 3/2 units, and R ′′ SiO 3/2 units may be added to the total copolymer mass by 50. %, Preferably 40% or less, but the molar ratio of R ′′ 2 HSiO 1/2 unit, R ′′ 3 SiO 1/2 unit and SiO 2 unit [(R ′′ 2 HSiO 1/2 + R ′′ 3 SiO 1/2 ) / SiO 2 ] is preferably 0.5 to 1.5, particularly preferably 0.5 to 1.3.
- organohydrogenpolysiloxane of component (C) examples include trimethylsiloxy group-capped methylhydrogen polysiloxane at both ends, trimethylsiloxy group-capped dimethylsiloxane / methylhydrogensiloxane copolymer at both ends, and dimethylhydrogensiloxy groups at both ends.
- the blending amount of the organohydrogenpolysiloxane of component (C) is 0.5 to 30 parts by weight, particularly 0.6 to 20 parts by weight, based on 100 parts by weight of the total of components (A) and (B). . If the blending amount is too small or too large, sufficient rubber strength cannot be obtained.
- the organohydrogenpolysiloxane of component (C) is bonded to the silicon atom in component (C) relative to the alkenyl group bonded to the silicon atom included in components (A), (B), and (E).
- the hydrogen atom (SiH group) is blended in such an amount that the molar ratio is 0.2 to 1.5, more preferably 0.25 to 1.2, and still more preferably 0.3 to 0.9.
- addition reaction catalyst for component (D) platinum black, platinous chloride, chloroplatinic acid, a reaction product of chloroplatinic acid and a monohydric alcohol, a complex of chloroplatinic acid and olefins, chloroplatinic acid and vinyl Examples include complexes with siloxanes, platinum-based catalysts such as platinum bisacetoacetate, palladium-based catalysts, and rhodium-based catalysts.
- the addition amount of the addition reaction catalyst can be a catalytic amount, and is usually 0.5 to 1,000 ppm, particularly with respect to the total amount of the components (A), (B) and (E) as the platinum group metal. It is about 1 to 500 ppm.
- the hardness of the pressure-sensitive adhesive layer is smaller than the hardness of the base rubber, and is preferably a positive number of Asker C hardness of 60 or less, more preferably in the range of 1 to 55, still more preferably 2 to 40. Range. If it is less than 1, the strength as a rubber may be inferior, and if it exceeds 60, the adhesiveness may decrease.
- the material for laying the waterproof sheet is glass, but as an index of adhesiveness, the measured value is stable for measuring adhesive strength, and the strength of adhesiveness in other materials Since there is a correlation between the values of the adhesive strength to glass, it is defined here.
- the composition for forming the base rubber layer and the adhesive layer includes, as necessary, other components such as fumed silica, precipitated silica, quartz powder, diatomaceous earth, and calcium carbonate.
- other components such as fumed silica, precipitated silica, quartz powder, diatomaceous earth, and calcium carbonate.
- fillers such as carbon black, conductive zinc white, conductive agents such as metal powder, and heat-resistant agents such as iron oxide and cerium oxide may be blended.
- hydrosilylation reaction control agents such as nitrogen-containing compounds, acetylene compounds, phosphorus compounds, nitrile compounds, carboxylates, tin compounds, mercury compounds, sulfur compounds, internal mold release agents such as dimethyl silicone oil, adhesion promoters, thixotropes
- a property-imparting agent or the like is optional as long as the crosslinking reaction is not inhibited.
- the thickness of the base rubber is 0.2 to 5 mm, preferably 0.5 to 5 mm, particularly 0.5 to 3 mm. If the thickness is less than 0.2 mm, it may be insufficient for taking advantage of the elasticity of the sheet. If the thickness exceeds 5 mm, the weight increases, affecting the attachment, and may be disadvantageous in terms of cost. Further, the thickness of the adhesive layer is preferably in the range of 0.3 to 3 mm, more preferably in the range of 0.5 to 2 mm. If it is less than 0.3 mm, the surface unevenness of the part to be adhered to which the adhesive layer is adhered cannot be absorbed, and if it exceeds 3 mm, the rubber strength of the affixed surface depends on the adhesive layer and may cause rubber destruction.
- the base rubber When forming the waterproof sheet of the present invention, first, a base rubber is formed.
- the base rubber may be formed as a single layer using a rubber composition such as a silicone rubber composition, or may be formed as a composite layer with metal or various resins, for example, compression molding or injection molding. Integrate with other base materials by directly obtaining a sheet by injection molding, by molding a sheet on a metal substrate, resin substrate, resin film by insert molding, or by dipping, coating, calendar molding, screen printing, etc.
- calendar molding is preferable because it can be suitably used.
- the adhesive layer is laminated on the base rubber, but the adhesive layer may be formed after the composition for forming the base rubber is cured to form the base rubber, or the base rubber is formed.
- the composition to be formed may be calendered on a film such as polyethylene terephthalate (PET) and dispensed, and a composition that forms an adhesive layer in an unvulcanized state may be laminated.
- PET polyethylene terephthalate
- the composition for forming the adhesive layer is preferable because there is a method for obtaining a laminated sheet by a method such as dipping, coating or screen printing on the composition for forming the base rubber layer, and coating molding can be suitably used.
- These curing conditions are preferably in the range of 80 to 250 ° C. and 10 seconds to 1 hour. Further, after-curing may be performed at 120 to 250 ° C. for about 1 to 100 hours for the purpose of removing low molecular siloxane.
- the waterproof sheet of the present invention usually has a cover film 3 such as a polyethylene terephthalate (PET) sheet laminated on the adhesive layer 2 so that the cover film 3 can be peeled off. It removes and the adhesion layer 2 is stuck on the required to-be-adhered part.
- a cover film 3 such as a polyethylene terephthalate (PET) sheet laminated on the adhesive layer 2 so that the cover film 3 can be peeled off. It removes and the adhesion layer 2 is stuck on the required to-be-adhered part.
- PET polyethylene terephthalate
- FIG. 2 shows an outdoor tank 30 supported and installed on a base 20, in which oil, asphalt, various gases, for example, are placed. The contents such as kind are stored.
- the outdoor tank 30 is generally cylindrical, has a diameter of 10 to 80 m, and a height of 10 to 50 m, and is installed on the base 20 as described above.
- 10 is the ground.
- the tank bottom of the outdoor tank 30 is constituted by an annular plate 31, and a boundary portion between the base 20 and the annular plate 31 is a boundary portion 32 between the outdoor tank and the base.
- the base 20 is preferably constructed using a waterproof sheet 40 that is compatible with a base made of concrete, mortar, asphalt concrete, asphalt mortar, asphalt sand, or a combination thereof.
- the waterproof sheet 40 is constructed so as to cover the boundary portion 32 between the base 20 and the annular plate 31. Moreover, as shown in FIG. 4, the waterproof sheet 40 may be constructed so as to cover the side surface of the outdoor tank.
- a plurality of waterproof sheets are used, and the plurality of sheets are juxtaposed along the boundary portion, and the entire boundary portion is covered with the waterproof sheet.
- the boundary between the outdoor tank and the base is used.
- the part which is easily exposed in the part is a part between adjacent waterproof sheets.
- the width of the overlapping portion 50 of the waterproof sheets is preferably 5 mm or more, more preferably 10 mm or more, and even more preferably 20 mm or more. If the width of the overlapping portion of the waterproof sheets is smaller than 5 mm, peeling may occur during construction, and the boundary portion 32 cannot be completely covered, and rainwater may enter.
- the overlapping portion of the waterproof sheets becomes large, for example, 50 mm or more, the necessary amount of the waterproof sheet for covering all the boundary portions 32 increases, resulting in an increase in cost.
- the adhesive strength of the adhesive layer of the waterproof sheet attached to the base and the annular plate (outdoor tank) is 0.5 to 10 N / 25 mm between the outdoor tank and the waterproof sheet, and the base and the waterproof sheet are waterproof. It is preferable to perform construction using a waterproof sheet having a sheet thickness of 0.5 to 10 N / 25 mm.
- the waterproof sheet having the adhesive force rainwater can be prevented from entering from the boundary between the outdoor tank and the waterproof sheet and from the boundary between the base and the waterproof sheet for a long period of time.
- the adhesive strength is smaller than the above, peeling easily occurs, and rainwater enters from the peeled portion.
- the end edge portion of the waterproof sheet 40 on the outdoor tank 30 side and the end edge portion on the base 20 side are bonded with a sealing material 60.
- a sealing material 60 so as to cover the overlapping portion 50.
- Any known silicone, polysulfide, polyurethane, etc. can be used as the sealant, but a construction method using a silicone sealant is preferred.
- sealant master 300, sealant 70, sealant 701, etc. manufactured by Shin-Etsu Chemical Co., Ltd. can be used.
- the waterproof sheet of the present invention construction without a primer is possible, and the construction period can be greatly shortened.
- the rain plate waterproofing device stipulated by law is required for the annular plate and the tank base portion that are often installed in refineries and the like.
- the rainwater prevention device part is peeled off and the adhesion part is confirmed, but the current butyl rubber sheet, sealing material, petroleum-based waterproof sheet, etc. use a primer at the time of construction, so they are adhered, It was difficult to confirm the inside after peeling.
- the waterproof sheet according to the present invention exhibits a waterproof function with adhesive strength, it is possible to easily peel off and observe the inside simply by removing the fixing seal portion at the end of the sheet. In addition, it is a great feature that the waterproof function can be exhibited by the adhesive force again.
- Example 1 Addition (hydrosilylation) reaction vulcanizing agent C-19A / B (Shin-Etsu Chemical Co., Ltd.) to 100 parts of millable dimethyl silicone rubber compound KE-675-U (Shin-Etsu Chemical Co., Ltd.) on base rubber layer Dimethylsilicone rubber composition kneaded with two rolls and 0.5 / 2.5 parts of each product) was calendered into a 0.7 mm thick sheet on a 100 ⁇ m embossed PET film. The sheet was molded and continuously heated and cured in a heating furnace at 140 ° C. for 10 minutes to obtain a sheet having a base rubber layer laminated on a PET film.
- a resinous copolymer (4) having a SiH group mainly composed of (CH 3 ) 2 HSiO 1/2 units and SiO 2 units as a crosslinking agent (SiH group amount 0.0090 mol / 0.9 part of g) and 0.05 part of ethynylcyclohexanol as a reaction control agent were added, and stirring was continued for 15 minutes to obtain a silicone rubber composition.
- This silicone rubber composition was mixed with 0.1 part of a platinum catalyst (Pt concentration 1%) to obtain a pressure-sensitive adhesive composition.
- a comma coater is used to laminate and coat the pressure-sensitive adhesive composition to 1.0 mm, and heat-cured in a heating furnace at 140 ° C. for 10 minutes to form a two-layer laminated cured sheet. Obtained.
- the base rubber had a durometer type A hardness of 68 and the adhesive layer had an Asker C hardness of 15.
- Table 1 shows the results obtained by peeling the substrate-side PET from the obtained laminated sheet and evaluating it by the following methods.
- the waterproof sheet having a length of 30 cm and a length of 100 cm obtained as described above was used, and a large number of the above-mentioned waterproof sheets were continuously provided at the boundary with the base of the outdoor tank as shown in FIG. Laid.
- a sealant master 300 was used as the sealant, and the tank or base was bonded to 2 cm from the outer periphery of each waterproof sheet.
- Example 2 To the base rubber layer, 100 parts of millable dimethyl silicone rubber compound KE-675-U (Shin-Etsu Chemical Co., Ltd.), 1. organic peroxide vulcanizing agent C-23N (Shin-Etsu Chemical Co., Ltd.) A dimethyl silicone rubber composition added with 0 part and kneaded with two rolls was formed into a 0.7 mm thick sheet on a 100 ⁇ m embossed PET film by calendering and continuously in a heating furnace. The sheet was cured by heating at 140 ° C. for 10 minutes to obtain a sheet having a base rubber layer laminated on a PET film. Subsequent procedures such as adjustment of the adhesive layer and lamination method were performed in the same manner as in Example 1.
- Example 3 Dimethylsiloxane unit ((CH 3 ) 2 SiO 2/2 ) 99.625 mol%, methyl vinyl siloxane unit ((CH 2 ⁇ CH) (CH 3 ) SiO 2/2 ) 0.350 mol%, dimethylvinylsiloxy unit 100 parts of an organopolysiloxane comprising ((CH 2 ⁇ CH) (CH 3 ) 2 SiO 1/2 ) 0.025 mol% and having an average degree of polymerization of about 6,000, a fume having a BET specific surface area of 200 m 2 / g 10 parts of dosilica (trade name Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), 8 parts of hydroxy-terminated dimethylsiloxane having an average polymerization degree of 4 as a dispersant are added, kneaded with a kneader, and heated at 170 ° C.
- organopolysiloxane comprising ((CH 2 ⁇ CH)
- Compound A was prepared. Dimethyl kneaded with two rolls by adding 0.5 / 2.5 parts of addition (hydrosilylation) reaction system vulcanizing agent C-19A / B (manufactured by Shin-Etsu Chemical Co., Ltd.) to 100 parts of the above compound A
- the silicone rubber composition is formed into a sheet of 0.7 mm thickness on a 100 ⁇ m embossed PET film by calendering, and then continuously cured by heating at 140 ° C. for 10 minutes in a heating furnace. A sheet having a base rubber layer laminated thereon was obtained. Subsequent procedures such as adjustment of the adhesive layer and lamination method were performed in the same manner as in Example 1.
- Example 4 Addition (hydrosilylation) reaction system vulcanizing agent C-19A / B (Shin-Etsu Chemical Co., Ltd.) to 100 parts of millable dimethyl silicone rubber compound KE-541-U (Shin-Etsu Chemical Co., Ltd.) on the base rubber layer Dimethylsilicone rubber composition kneaded with two rolls and 0.5 / 2.5 parts of each product) was calendered into a 0.7 mm thick sheet on a 100 ⁇ m embossed PET film. The sheet was molded and continuously heated and cured in a heating furnace at 140 ° C. for 10 minutes to obtain a sheet having a base rubber layer laminated on a PET film. Subsequent procedures such as adjustment of the adhesive layer and lamination method were performed in the same manner as in Example 1.
- Example 5 100 parts of each of liquid silicones KE-1990-50A and KE-1990-50B (manufactured by Shin-Etsu Chemical Co., Ltd.) were mixed with a mixer for 15 minutes. Using a comma coater, this liquid silicone composition was formed into a sheet having a thickness of 0.7 mm on a 100 ⁇ m embossed PET film, and continuously heated and cured in a heating furnace at 140 ° C. for 10 minutes. A sheet having a base rubber layer laminated on a PET film was obtained. Subsequent procedures such as adjustment of the adhesive layer and lamination method were performed in the same manner as in Example 1.
- Compound B was prepared. A dimethyl silicone rubber composition kneaded with two rolls by adding 1.0 part of an organic peroxide vulcanizing agent C-23N (manufactured by Shin-Etsu Chemical Co., Ltd.) to 100 parts of the above compound B by calendar molding Molded into a sheet of 0.7 mm thickness on a 100 ⁇ m embossed PET film, and continuously cured by heating at 140 ° C. for 10 minutes in a heating furnace, and a base rubber layer was laminated on the PET film A sheet was obtained. Subsequent procedures such as adjustment of the adhesive layer and lamination method were performed in the same manner as in Example 1. Table 2 shows the results obtained by peeling the substrate-side PET from the obtained laminated sheet and evaluating it by the following methods.
- C-23N manufactured by Shin-Etsu Chemical Co., Ltd.
- Compound CM was prepared.
- Compound C was prepared by adding 70 parts of diatomaceous earth (trade name Celite SF) and 1 part of hydroxy-terminated dimethylsiloxane having an average polymerization degree of 15 as a dispersing agent to 100 parts of the above compound C-M. Subsequent procedures such as the sheet forming method, the adjustment of the adhesive layer, and the lamination method were performed in the same manner as in Comparative Example 1.
- Each evaluation item / adhesiveness The obtained sheet was cut into a width of 25 mm and a length of 10 cm, glass FL2.0 manufactured by Nippon Sheet Glass Co., Ltd. was degreased with alcohol in accordance with JIS Z 0237, and air-dried 4 mm thick glass plate The adhesive layer side of the sheet was attached to the glass, and the glass and the adhesive layer were peeled off at 180 ° peel at a rate of 300 mm / min at room temperature, and the adhesive strength was measured.
- ⁇ Long-term sticking stability The above-prepared adhesive sheet is cut to a width of 25 mm and a length of 10 cm on a 4 mm thick glass substrate, the adhesive layer side is attached, and room temperature is 1 month at a humidity of 50% RH.
- the glass and the adhesive layer were peeled off at 180 ° peel at a rate of 300 mm / min at room temperature, and the adhesive strength was measured.
- the prepared adhesive sheet was cut to a width of 25 mm and a length of 10 cm, the adhesive layer side was attached, and stored for 1 month at room temperature and 50% RH humidity. Thereafter, the glass and the adhesive layer were peeled off at 180 ° peel at a rate of 300 mm / min at room temperature, and it was confirmed whether or not the adhesive component was transferred to the glass surface. Those where the adhesive component migrated were marked with ⁇ , and those which did not migrate were marked with ⁇ .
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Abstract
Description
なお、本発明に関連する先行技術としては、特開平8-198384号公報(特許文献1)、特許第4076673号公報(特許文献2)が挙げられる。
〔1〕
基材ゴム層上に粘着層が形成されてなる防水シートであって、基材ゴムはJIS-Aの硬さが15~90で、かつ引張り強さが3MPa以上、伸びが100~800%、クレセント形引裂き強さが3kN/m以上を満足するシリコーンゴムからなることを特徴とする防水シート。
〔2〕
粘着層の硬さが基材ゴムの硬さより低く、アスカーC硬度で1~60である〔1〕記載の防水シート。
〔3〕
粘着層のガラスに対する粘着力が0.5~10N/25mmである〔1〕又は〔2〕記載の防水シート。
〔4〕
粘着層が粘着性を有するシリコーン樹脂又はシリコーンゲルにより形成された〔1〕~〔3〕のいずれかに記載の防水シート。
〔5〕
基材ゴムの厚さが0.2~5mmであり、粘着層の厚さが0.3~3mmである〔1〕~〔4〕のいずれかに記載の防水シート。
〔6〕
屋外タンクと土台部分との境界部分に施工される、屋外タンクの防水施工用である〔1〕~〔5〕のいずれかに記載の防水シート。
〔7〕
土台上に設置した屋外タンクの底部と前記土台との境界部分を、〔1〕~〔6〕のいずれかに記載の防水シートの粘着層を屋外タンクから土台にまたがって貼着することにより液密に被覆することを特徴とする屋外タンクの防水施工方法。
〔8〕
複数の防水シートを並設して前記境界部分を液密に被覆すると共に、互に隣接する防水シートを重なり部分の幅を5mm以上として液密に重ね合せて貼着するようにした〔7〕記載の屋外タンクの防水施工方法。
〔9〕
土台が、コンクリート、モルタル、アスファルトコンクリート、アスファルトモルタル又はアスファルトサンドにて形成された〔7〕又は〔8〕記載の屋外タンクの防水施工方法。
図1は、かかる防水シート40の一実施例を示すもので、1が基材ゴム、2が粘着層、3がカバーフィルムである。
また、引張り強さや引裂き強さが低い場合には、施工時の施工面の凹凸により生じるシートにかかる応力に対応しきれず、切れ、裂け等の損傷を生じやすいといった問題が生じる。
(A)1分子中に少なくとも2個の珪素原子と結合するアルケニル基を含有するオルガノポリシロキサン、
(B)R3SiO1/2単位(式中、Rは非置換又は置換の1価炭化水素基であるが、Rはアルケニル基を含む)とSiO2単位とを主成分とする樹脂質共重合体、
(C)珪素原子と結合する水素原子(SiH基)を1分子中に少なくとも2個含有するオルガノハイドロジェンポリシロキサン、
(D)付加反応触媒
この場合、この付加硬化型シリコーンゴム組成物は、必要により、更に
(E)R'3SiO1/2単位(式中、R'は非置換又は置換の1価炭化水素基であるが、R'はアルケニル基を含まないか、含んでも(B)成分のアルケニル基含有量より少ない量である)とSiO2単位とを主成分とする樹脂質共重合体を含有してもよい。
R1 aSiO(4-a)/2 (1)
で示されるものが用いられる。
R2 bHcSiO(4-b-c)/2 (2)
(式中、R2は炭素数1~10の非置換又は置換の1価炭化水素基である。また、bは0.7~2.1、cは0.001~1.0で、かつb+cは0.8~3.0を満足する正数である。)
で示され、1分子中に少なくとも2個(通常2~200個)、好ましくは3~100個、より好ましくは3~50個の珪素原子結合水素原子を有するものが好適に用いられる。ここで、R2の1価炭化水素基としては、R1で例示したものと同様のものを挙げることができるが、脂肪族不飽和基を有しないものが好ましい。また、bは好ましくは0.8~2.0、cは好ましくは0.01~1.0、b+cは好ましくは1.0~2.5であり、オルガノハイドロジェンポリシロキサンの分子構造は、直鎖状、環状、分岐状、三次元網目状のいずれの構造であってもよい。この場合、1分子中の珪素原子の数(又は重合度)は2~300個、特に4~150個程度の室温(25℃)で液状のものが好適に用いられる。なお、珪素原子に結合する水素原子は分子鎖末端、分子鎖の途中のいずれに位置していてもよく、両方に位置するものであってもよい。
シーリング材は公知のシリコーン系、ポリサルファイド系、ポリウレタン系等のいずれのものも使用できるが、シリコーンシーリング材を用いた施工方法が好適である。このようなシーリング材としては、信越化学工業株式会社製のシーラントマスター300、シーラント70、シーラント701等を使用できる。
即ち、上述したように、製油所などに多く設置されているアニュラープレートとタンク土台部分は法定で定められた雨水防水装置が必要とされている。
また、再度粘着力で防水機能を発揮できることが大きな特徴である。
基材ゴム層に、ミラブル型ジメチルシリコーンゴムコンパウンドKE-675-U(信越化学工業株式会社製)100部に、付加(ヒドロシリル化)反応系加硫剤C-19A/B(信越化学工業株式会社製)をそれぞれ0.5/2.5部添加して二本ロールで混練したジメチルシリコーンゴム組成物をカレンダー成形にて、100μmのシボ付のPETフィルム上に厚さ0.7mmのシート状に成形し、連続して、加熱炉で140℃、10分間加熱硬化させて、PETフィルム上に基材ゴム層が積層されたシートを得た。
粘着層に両末端がジメチルビニルシロキシ基で封鎖された平均重合度が1,000であるジメチルポリシロキサン(1)75部、室温(25℃)で固体の(CH2=CH)(CH3)2SiO1/2単位、(CH3)3SiO1/2単位及びSiO2単位からなる樹脂質共重合体(2)[((CH2=CH)(CH3)2SiO1/2単位+(CH3)3SiO1/2単位)/SiO2単位(モル比)=0.85、CH2=CH-基含有量:0.0008mol/g]25部を含む50%トルエン溶液を撹拌混合器に入れ、30分混合した後、トルエンを完全に留去した。このシリコーンゴムベース100部に、架橋剤として(CH3)2HSiO1/2単位とSiO2単位を主成分としたSiH基を有する樹脂質共重合体(4)(SiH基量0.0090mol/g)を0.9部、反応制御剤としてエチニルシクロヘキサノール0.05部を添加し、15分撹拌を続けて、シリコーンゴム組成物を得た。このシリコーンゴム組成物に白金触媒(Pt濃度1%)0.1部を混合し、粘着剤組成物を得た。
得られた積層シートについて基材側PETを剥離して、下記に示す各方法により評価した結果を表1に示す。
なお、防水性の評価には、上記のようにして得た縦30cm×長さ100cmの防水シートを用い、上記の防水シートを屋外タンクの土台との境界部分に図5のように多数連続して敷設した。その際、シーラントはシーラントマスター300を使用し、各防水シートの外周より2cmまでタンク又は土台と接着した。
基材ゴム層に、ミラブル型ジメチルシリコーンゴムコンパウンドKE-675-U(信越化学工業株式会社製)100部に、有機過酸化物加硫剤C-23N(信越化学工業株式会社製)を1.0部添加して二本ロールで混練したジメチルシリコーンゴム組成物をカレンダー成形にて、100μmのシボ付のPETフィルム上に厚さ0.7mmのシート状に成形し、連続して、加熱炉で140℃、10分間加熱硬化させて、PETフィルム上に基材ゴム層が積層されたシートを得た。
粘着層の調整、積層方法など以降の手順は実施例1と同様に行なった。
ジメチルシロキサン単位((CH3)2SiO2/2)99.625モル%、メチルビニルシロキサン単位((CH2=CH)(CH3)SiO2/2)0.350モル%、ジメチルビニルシロキシ単位((CH2=CH)(CH3)2SiO1/2)0.025モル%からなり、平均重合度が約6,000であるオルガノポリシロキサン100部、BET比表面積200m2/gのヒュームドシリカ(商品名アエロジル200、日本アエロジル株式会社製)10部、分散剤として平均重合度4のヒドロキシ末端ジメチルシロキサン8部を添加し、ニーダーにて混練りし、170℃にて2時間加熱処理してコンパウンドAを調製した。
上記コンパウンドA100部に対し、付加(ヒドロシリル化)反応系加硫剤C-19A/B(信越化学工業株式会社製)をそれぞれ0.5/2.5部添加して二本ロールで混練したジメチルシリコーンゴム組成物をカレンダー成形にて、100μmのシボ付のPETフィルム上に厚さ0.7mmのシート状に成形し、連続して、加熱炉で140℃、10分間加熱硬化させて、PETフィルム上に基材ゴム層が積層されたシートを得た。
粘着層の調整、積層方法など以降の手順は実施例1と同様に行なった。
基材ゴム層に、ミラブル型ジメチルシリコーンゴムコンパウンドKE-541-U(信越化学工業株式会社製)100部に、付加(ヒドロシリル化)反応系加硫剤C-19A/B(信越化学工業株式会社製)をそれぞれ0.5/2.5部添加して二本ロールで混練したジメチルシリコーンゴム組成物をカレンダー成形にて、100μmのシボ付のPETフィルム上に厚さ0.7mmのシート状に成形し、連続して、加熱炉で140℃、10分間加熱硬化させて、PETフィルム上に基材ゴム層が積層されたシートを得た。
粘着層の調整、積層方法など以降の手順は実施例1と同様に行なった。
液状シリコーンKE-1990-50A及びKE-1990-50B(信越化学工業株式会社製)各100部をミキサーで15分間混合した。この液状シリコーン組成物をコンマコータを使用して、100μmのシボ付のPETフィルム上に厚さ0.7mmのシート状に成形し、連続して、加熱炉で140℃、10分間加熱硬化させて、PETフィルム上に基材ゴム層が積層されたシートを得た。
粘着層の調整、積層方法など以降の手順は実施例1と同様に行なった。
ジメチルシロキサン単位((CH3)2SiO2/2)99.922モル%、メチルビニルシロキサン単位((CH2=CH)(CH3)SiO2/2)0.053モル%、ジメチルビニルシロキシ単位((CH2=CH)(CH3)2SiO1/2)0.025モル%からなり、平均重合度が約6,000であるオルガノポリシロキサン100部、BET比表面積200m2/gのヒュームドシリカ(商品名アエロジル200、日本アエロジル株式会社製)10部、分散剤として平均重合度4のヒドロキシ末端ジメチルシロキサン15部を添加し、ニーダーにて混練りし、170℃にて2時間加熱処理してコンパウンドBを調製した。
上記コンパウンドB100部に対し、有機過酸化物加硫剤C-23N(信越化学工業株式会社製)を1.0部添加して二本ロールで混練したジメチルシリコーンゴム組成物をカレンダー成形にて、100μmのシボ付のPETフィルム上に厚さ0.7mmのシート状に成形し、連続して、加熱炉で140℃、10分間加熱硬化させて、PETフィルム上に基材ゴム層が積層されたシートを得た。
粘着層の調整、積層方法など以降の手順は実施例1と同様に行なった。
得られた積層シートについて基材側PETを剥離して、下記に示す各方法により評価した結果を表2に示す。
ジメチルシロキサン単位((CH3)2SiO2/2)99.825モル%、メチルビニルシロキサン単位((CH2=CH)(CH3)SiO2/2)0.150モル%、ジメチルビニルシロキシ単位((CH2=CH)(CH3)2SiO1/2)0.025モル%からなり、平均重合度が約6,000であるオルガノポリシロキサン100部、BET比表面積200m2/gのヒュームドシリカ(商品名アエロジル200、日本アエロジル株式会社製)60部、分散剤として平均重合度4のヒドロキシ末端ジメチルシロキサン15部を添加し、ニーダーにて混練りし、170℃にて2時間加熱処理してコンパウンドC-Mを調製した。
上記コンパウンドC-M100部に対し、珪藻土(商品名セライトSF、)70部、分散剤として平均重合度15のヒドロキシ末端ジメチルシロキサン1部を二本ロールにて添加しコンパウンドCを調製した。
シート成形の方法、粘着層の調整、積層方法など以降の手順は比較例1と同様に行なった。
ジメチルシロキサン単位((CH3)2SiO2/2)99.892モル%、メチルビニルシロキサン単位((CH2=CH)(CH3)SiO2/2)0.083モル%、ジメチルビニルシロキシ単位((CH2=CH)(CH3)2SiO1/2)0.025モル%からなり、平均重合度が約6,000であるオルガノポリシロキサン100部、BET比表面積130m2/gのヒュームドシリカ(商品名アエロジル130、日本アエロジル株式会社製)5部、分散剤として平均重合度4のヒドロキシ末端ジメチルシロキサン1部を添加し、ニーダーにて混練りし、170℃にて2時間加熱処理してコンパウンドDを調製した。
シート成形の方法、粘着層の調整、積層方法など以降の手順は比較例1と同様に行なった。
ジメチルシロキサン単位((CH3)2SiO2/2)99.540モル%、メチルビニルシロキサン単位((CH2=CH)(CH3)SiO2/2)0.435モル%、ジメチルビニルシロキシ単位((CH2=CH)(CH3)2SiO1/2)0.025モル%からなり、平均重合度が約6,000であるオルガノポリシロキサン100部、カーボンブラック(商品名デンカブラック、デンカ株式会社製)50部、結晶性シリカ(商品名クリスタライトVX-ST、製)140部、分散剤としてヒドロキシ末端メチルビニルシロキサン1部を添加し、加圧ニーダーにて混練りしてコンパウンドEを調製した。
シート成形の方法、粘着層の調整、積層方法など以降の手順は、コンパウンドEの加硫剤に付加(ヒドロシリル化)反応系加硫剤C-19A/B(信越化学工業株式会社製)をそれぞれ0.5/2.5部を添加する以外は比較例1と同様に行なった。
ジメチルシロキサン単位((CH3)2SiO2/2)99.930モル%、メチルビニルシロキサン単位((CH2=CH)(CH3)SiO2/2)0.045モル%、ジメチルビニルシロキシ単位((CH2=CH)(CH3)2SiO1/2)0.025モル%からなり、平均重合度が約6,000であるオルガノポリシロキサン100部、BET比表面積210m2/gの処理シリカ(商品名アエロジルR976、日本アエロジル株式会社製)20部、分散剤として平均重合度4のヒドロキシ末端ジメチルシロキサン1部を添加し、ニーダーにて混練りし、170℃にて2時間加熱処理してコンパウンドFを調製した。
シート成形の方法、粘着層の調整、積層方法など以降の手順は比較例1と同様に行なった。
・粘着性
得られたシートを幅25mm,長さ10cmに切断し、JIS Z 0237に準拠して日本板硝子株式会社製ガラスFL2.0をアルコールで脱脂し、風乾した4mm厚のガラス板にシートの粘着層側を貼り付け、室温にて300mm/minの速度にて180°ピールでガラスと粘着層とを剥離し、その粘着力を測定した。
・長期貼り付け安定性
4mmの厚さのガラス基板上に、上記作製した粘着シートを幅25mm,長さ10cmに切断し、粘着層側を貼り付けて、室温,50%RHの湿度で1ヶ月保存した後、室温にて300mm/minの速度にて180°ピールでガラスと粘着層とを剥離し、その粘着力を測定した。
・再剥離性
4mmの厚さのガラス基板上に、上記作製した粘着シートを幅25mm,長さ10cmに切断し、粘着層側を貼り付けて、室温,50%RHの湿度で1ヶ月保存した後、室温にて300mm/minの速度にて180°ピールでガラスと粘着層とを剥離し、ガラス面に粘着成分が移行したかどうかを確認した。粘着成分の移行するものは×、移行しないものは○とした。
・変形に対する弾力性
積層フィルムを180°に曲げたときに、積層シートに対するダメージの有無を確認した。変化のないものは○、亀裂・変形のあるものは×とした。
・防水性
初期:施工後1ヶ月間で雨水の浸入がないものは○、雨水の浸入があるものは×とした。
長期:施工後6ヶ月間で雨水の浸入がないものは○、雨水の浸入があるものは×とした。
2 粘着層
3 カバーフィルム
10 地面
20 土台
30 屋外タンク
31 アニュラープレート(屋外タンクの一部)
32 屋外タンクと土台との境界部分
40 防水シート
50 重なり部分
60 シーリング材
Claims (9)
- 基材ゴム層上に粘着層が形成されてなる防水シートであって、基材ゴムはJIS-Aの硬さが15~90で、かつ引張り強さが3MPa以上、伸びが100~800%、クレセント形引裂き強さが3kN/m以上を満足するシリコーンゴムからなることを特徴とする防水シート。
- 粘着層の硬さが基材ゴムの硬さより低く、アスカーC硬度で1~60である請求項1記載の防水シート。
- 粘着層のガラスに対する粘着力が0.5~10N/25mmである請求項1又は2記載の防水シート。
- 粘着層が粘着性を有するシリコーン樹脂又はシリコーンゲルにより形成された請求項1~3のいずれか1項記載の防水シート。
- 基材ゴムの厚さが0.2~5mmであり、粘着層の厚さが0.3~3mmである請求項1~4のいずれか1項記載の防水シート。
- 屋外タンクと土台部分との境界部分に施工される、屋外タンクの防水施工用である請求項1~5のいずれか1項記載の防水シート。
- 土台上に設置した屋外タンクの底部と前記土台との境界部分を、請求項1~6のいずれか1項記載の防水シートの粘着層を屋外タンクから土台にまたがって貼着することにより液密に被覆することを特徴とする屋外タンクの防水施工方法。
- 複数の防水シートを並設して前記境界部分を液密に被覆すると共に、互に隣接する防水シートを重なり部分の幅を5mm以上として液密に重ね合せて貼着するようにした請求項7記載の屋外タンクの防水施工方法。
- 土台が、コンクリート、モルタル、アスファルトコンクリート、アスファルトモルタル又はアスファルトサンドにて形成された請求項7又は8記載の屋外タンクの防水施工方法。
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US14/435,639 US9797129B2 (en) | 2012-10-15 | 2013-08-19 | Waterproof sheet for outdoor tank and method for applying same |
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JP6271828B1 (ja) * | 2016-04-26 | 2018-01-31 | 東レ・ダウコーニング株式会社 | フレキシブル積層体及びそれを備えたフレキシブルディスプレイ |
JP6914665B2 (ja) * | 2017-02-08 | 2021-08-04 | 信越ポリマー株式会社 | コンクリート表面被覆部材用シリコーンゴム組成物、それを用いたコンクリート表面被覆部材及びコンクリート表面被覆方法 |
JP6756304B2 (ja) * | 2017-06-12 | 2020-09-16 | 信越化学工業株式会社 | 防水シート及び防水施工方法 |
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JP7050704B2 (ja) * | 2019-02-07 | 2022-04-08 | 信越化学工業株式会社 | 熱伝導性粘着層を有する熱伝導性シリコーンゴムシート |
CN116855190B (zh) * | 2023-08-03 | 2024-01-30 | 荆门科顺新材料有限公司 | 一种超疏水自粘防水卷材及其制备方法和应用 |
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Also Published As
Publication number | Publication date |
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EP2907934B1 (en) | 2019-04-10 |
JP6060610B2 (ja) | 2017-01-18 |
KR20150070248A (ko) | 2015-06-24 |
TW201429835A (zh) | 2014-08-01 |
EP2907934A1 (en) | 2015-08-19 |
TWI565638B (zh) | 2017-01-11 |
JP2014080754A (ja) | 2014-05-08 |
KR102055924B1 (ko) | 2019-12-13 |
CN104736782A (zh) | 2015-06-24 |
SG11201502924QA (en) | 2015-05-28 |
EP2907934A4 (en) | 2016-06-15 |
US20150267399A1 (en) | 2015-09-24 |
MY170113A (en) | 2019-07-05 |
US9797129B2 (en) | 2017-10-24 |
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