CN108795275A - A kind of coating and preparation method thereof that water resistance strong adhesive force is big - Google Patents
A kind of coating and preparation method thereof that water resistance strong adhesive force is big Download PDFInfo
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- CN108795275A CN108795275A CN201810560626.6A CN201810560626A CN108795275A CN 108795275 A CN108795275 A CN 108795275A CN 201810560626 A CN201810560626 A CN 201810560626A CN 108795275 A CN108795275 A CN 108795275A
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a kind of coating that water resistance strong adhesive force is big, raw material includes：Polyether 220, polyethers 3050, diisocyanate, solvent misture, double solvents, antioxidant, dimethicone, dioctyl phthalate, bentonite；Wherein, the solvent misture includes Petropols, coumarone indene resin, terpene resin；The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone.The invention also discloses a kind of preparation methods of the big coating of water resistance strong adhesive force.The coating properties of the present invention are all good, meet the index request of building coating, have the characteristics that high adhesion force, strong water resistance, reach the performance requirement of water proof anti-seepage, can be widely used for the ground such as roofing and underground and mine, be widely used.
Description
Technical field
The present invention relates to building material technical fields, and in particular to a kind of coating that water resistance strong adhesive force is big and its preparation
Method.
Background technology
Coating belongs to Fine Chemical, closely bound up with daily life, the level of domestic coatings industry and state
There is certain gap on border.Coating property determines the protection effect of coating, and in practical applications, coating should have hardness requirement not
Enough, the problems such as rainwater etc. washes away cracky under collision even rubs, thermo-labile, thermal stability is low, service life is short.Coating
Each performance is not independent, is interacted, close association, and the high-quality coating for developing new class is asked with solving above application
Topic, such as coating with excellent water resistance and adhesive force, while the competitiveness of domestic coating products also can be improved.
Invention content
Technical problems based on background technology, the present invention propose a kind of coating that water resistance strong adhesive force is big and its
Preparation method, properties of the present invention are all good, meet the index request of building coating, the spy with high adhesion force, strong water resistance
Point.
The present invention proposes a kind of coating that water resistance strong adhesive force is big, and raw material includes by weight：15-30 parts of polyethers
220,3-9 parts of polyethers 3050,15-25 parts of diisocyanate, 30-50 parts of solvent mistures, 35-60 parts of double solvents, 0.5-1.5 parts
Antioxidant, 1-3 part dimethicone, 2-6 parts of dioctyl phthalates, 5-10 parts of bentonites；Wherein, the solvent misture
Including Petropols, coumarone indene resin, terpene resin；The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone.
Preferably, the Petropols, coumarone indene resin, terpene resin weight ratio be 3-10：1-3：5-9.
Preferably, the ethyl acetate, 120# gasoline, toluene, acetone weight ratio be 15-25：15-20：4-8：1-2.
The invention also provides a kind of preparation methods of the big coating of water resistance strong adhesive force, include the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, diisocyanate is added in decompression stirring dehydration, and stirring is anti-
It answers, obtains prefabricated material A；
The prefabricated material A that step 1 obtains, heating are added into double solvents by S2, at room temperature, and stirring makes it completely dissolved,
Solvent misture is being added, then stirring and dissolving sequentially adds antioxidant, dimethicone, dioctyl phthalate, swelling
Soil is stirred to react, be down to room temperature to get.
Preferably, include the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, temperature be 110-130 DEG C, pressure be -0.09MPa
Under the conditions of stirring dehydration 0.5-1h, be then cooled to 70-78 DEG C, diisocyanate be added, 2- is stirred to react at 82-86 DEG C
3h obtains prefabricated material A；
The prefabricated material A that step 1 obtains is added into double solvents, is warming up to 40-60 DEG C, stirring makes it by S2, at room temperature
It is completely dissolved, solvent misture is being added, then stirring and dissolving sequentially adds antioxidant, dimethicone, phthalic acid two
Monooctyl ester, bentonite are stirred to react 30-60min at 60-70 DEG C, be down to room temperature to get.
Beneficial effects of the present invention：The raw material of the big coating of water resistance strong adhesive force of the present invention includes Polyether 220, gathers
Ether 3050, diisocyanate, solvent misture, double solvents, antioxidant, dimethicone, dioctyl phthalate, swelling
Soil.The present invention is made high intensity as raw material preparation method according to the invention using Polyether 220, polyethers 3050, diisocyanate and gathers
Urethane has good water proofing property, then adds solvent misture, the common reagentia of double solvents, not only can further change
The stickiness of rare book invention coating, can also enhance the present invention water resistance, solvent misture include Petropols, coumarone indene resin and
Terpene resin, double solvents include ethyl acetate, 120# gasoline, toluene and acetone, wherein the constitutive material cost of double solvents
It is relatively low with toxicity, there is good dissolubility, and solvent misture and system to high-strength polyurethane, solvent misture and other raw materials
Compatibility between the high-strength polyurethane obtained is good, applies in coating of the present invention so that and the coating of acquisition has good uniformity,
Solution homogeneous transparent；The present invention has the characteristics that high adhesion force, strong water resistance, reaches the performance purpose of water proof anti-seepage, can be extensive
For roofing and underground and mine and other places, have wide range of applications.
Specific implementation mode
In the following, technical scheme of the present invention is described in detail by specific embodiment.
Embodiment 1
A kind of coating that water resistance strong adhesive force is big, raw material include by weight：30 parts of Polyether 220s, 3 parts of polyethers
3050,25 parts of diisocyanate, 30 parts of solvent mistures, 60 parts of double solvents, 0.5 part of antioxidant, 3 parts of dimethicones, 2 parts
Dioctyl phthalate, 10 parts of bentonites；Wherein, the solvent misture includes Petropols, coumarone indene resin, terpenes tree
Fat；The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone；
Wherein, the Petropols, coumarone indene resin, terpene resin weight ratio be 3：3：5；The ethyl acetate,
120# gasoline, toluene, acetone weight ratio be 25：15：8：1.
The preparation method of the big coating of water resistance strong adhesive force, includes the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, in the condition that temperature is 130 DEG C, pressure is -0.09MPa
Lower stirring is dehydrated 0.5h, is then cooled to 78 DEG C, and diisocyanate is added, is stirred to react 3h at 82 DEG C, obtains prefabricated material A；
The prefabricated material A that step 1 obtains is added into double solvents, is warming up to 40 DEG C, stirring keeps its complete by S2, at room temperature
Solvent misture is being added in fully dissolved, then it is pungent to sequentially add antioxidant, dimethicone, phthalic acid two for stirring and dissolving
Ester, bentonite are stirred to react 30min at 70 DEG C, be down to room temperature to get.
Embodiment 2
A kind of coating that water resistance strong adhesive force is big, raw material include by weight：15 parts of Polyether 220s, 9 parts of polyethers
3050,15 parts of diisocyanate, 50 parts of solvent mistures, 35 parts of double solvents, 1.5 parts of antioxidants, 1 part of dimethicone, 6 parts
Dioctyl phthalate, 5 parts of bentonites；Wherein, the solvent misture includes Petropols, coumarone indene resin, terpene resin；
The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone；
Wherein, the Petropols, coumarone indene resin, terpene resin weight ratio be 10：1：9；The ethyl acetate,
120# gasoline, toluene, acetone weight ratio be 15：20：4：2.
The preparation method of the big coating of water resistance strong adhesive force, includes the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, in the condition that temperature is 110 DEG C, pressure is -0.09MPa
Lower stirring is dehydrated 1h, is then cooled to 70 DEG C, and diisocyanate is added, is stirred to react 2h at 86 DEG C, obtains prefabricated material A；
The prefabricated material A that step 1 obtains is added into double solvents, is warming up to 60 DEG C, stirring keeps its complete by S2, at room temperature
Solvent misture is being added in fully dissolved, then it is pungent to sequentially add antioxidant, dimethicone, phthalic acid two for stirring and dissolving
Ester, bentonite are stirred to react 60min at 60 DEG C, be down to room temperature to get.
Embodiment 3
A kind of coating that water resistance strong adhesive force is big, raw material include by weight：28 parts of Polyether 220s, 4 parts of polyethers
3050,23 parts of diisocyanate, 35 parts of solvent mistures, 55 parts of double solvents, 0.8 part of antioxidant, 2.5 parts of dimethicones, 3
Part dioctyl phthalate, 9 parts of bentonites；Wherein, the solvent misture includes Petropols, coumarone indene resin, terpenes tree
Fat；The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone；
Wherein, the Petropols, coumarone indene resin, terpene resin weight ratio be 4：2.5：6；The ethyl acetate,
120# gasoline, toluene, acetone weight ratio be 23：16：7：1.2.
The preparation method of the big coating of water resistance strong adhesive force, includes the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, in the condition that temperature is 125 DEG C, pressure is -0.09MPa
Lower stirring is dehydrated 0.6h, is then cooled to 76 DEG C, and diisocyanate is added, is stirred to react 3h at 83 DEG C, obtains prefabricated material A；
The prefabricated material A that step 1 obtains is added into double solvents, is warming up to 45 DEG C, stirring keeps its complete by S2, at room temperature
Solvent misture is being added in fully dissolved, then it is pungent to sequentially add antioxidant, dimethicone, phthalic acid two for stirring and dissolving
Ester, bentonite are stirred to react 35min at 68 DEG C, be down to room temperature to get.
Embodiment 4
A kind of coating that water resistance strong adhesive force is big, raw material include by weight：18 parts of Polyether 220s, 8 parts of polyethers
3050,16 parts of diisocyanate, 45 parts of solvent mistures, 40 parts of double solvents, 1.2 parts of antioxidants, 1.5 parts of dimethicones, 5
Part dioctyl phthalate, 6 parts of bentonites；Wherein, the solvent misture includes Petropols, coumarone indene resin, terpenes tree
Fat；The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone；
Wherein, the Petropols, coumarone indene resin, terpene resin weight ratio be 9：1.5：8；The ethyl acetate,
120# gasoline, toluene, acetone weight ratio be 17：19：5：2.
The preparation method of the big coating of water resistance strong adhesive force, includes the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, in the condition that temperature is 115 DEG C, pressure is -0.09MPa
Lower stirring is dehydrated 0.8h, is then cooled to 72 DEG C, and diisocyanate is added, is stirred to react 2h at 85 DEG C, obtains prefabricated material A；
The prefabricated material A that step 1 obtains is added into double solvents, is warming up to 55 DEG C, stirring keeps its complete by S2, at room temperature
Solvent misture is being added in fully dissolved, then it is pungent to sequentially add antioxidant, dimethicone, phthalic acid two for stirring and dissolving
Ester, bentonite are stirred to react 55min at 62 DEG C, be down to room temperature to get.
Embodiment 5
A kind of coating that water resistance strong adhesive force is big, raw material include by weight：23 parts of Polyether 220s, 7 parts of polyethers
3050,20 parts of diisocyanate, 40 parts of solvent mistures, 50 parts of double solvents, 1 part of antioxidant, 2 parts of dimethicones, 4 parts of neighbours
Dioctyl phthalate, 8 parts of bentonites；Wherein, the solvent misture includes Petropols, coumarone indene resin, terpene resin；Institute
It includes ethyl acetate, 120# gasoline, toluene, acetone to state double solvents；
Wherein, the Petropols, coumarone indene resin, terpene resin weight ratio be 6：2：7；The ethyl acetate,
120# gasoline, toluene, acetone weight ratio be 20：17：6：1.
The preparation method of the big coating of water resistance strong adhesive force, includes the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, in the condition that temperature is 120 DEG C, pressure is -0.09MPa
Lower stirring is dehydrated 0.6h, is then cooled to 74 DEG C, and diisocyanate is added, is stirred to react 2.5h at 84 DEG C, obtains prefabricated material
A；
The prefabricated material A that step 1 obtains is added into double solvents, is warming up to 50 DEG C, stirring keeps its complete by S2, at room temperature
Solvent misture is being added in fully dissolved, then it is pungent to sequentially add antioxidant, dimethicone, phthalic acid two for stirring and dissolving
Ester, bentonite are stirred to react 45min at 65 DEG C, be down to room temperature to get.
Test example 1
Coating made from embodiment 1-5 is coated in respectively and is polished flat on smooth iron plate, thickness 2mm is placed in room temperature
It is lower 2 days, dry in drying box after naturally dry forms a film, film is obtained, film is tested for the property, test result such as table 1
It is shown.
1 film performance test result of table
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Appearance of film | It is transparent | It is transparent | It is transparent | It is transparent | It is transparent |
| Room temperature surface drying time/min | 41 | 38 | 43 | 40 | 42 |
| Do solid work the time/h | 25 | 26 | 27 | 23 | 22 |
| Viscosity/s | 42 | 40 | 36 | 39 | 38 |
| Bin stability | It is qualified | It is qualified | It is qualified | It is qualified | It is qualified |
| Thermal stability grade | 6 | 5 | 6 | 5 | 6 |
| Adhesive force/grade | 1 | 1 | 1 | 1 | 1 |
| Water absorption rate/% | 13.52 | 14.02 | 14.56 | 13.21 | 12.95 |
| Water resistance (impregnates 250h) | It is qualified | It is qualified | It is qualified | It is qualified | It is qualified |
As can be seen from Table 1, the water absorption rate of gained film is 12.95%, adhesion 1 grade, thermal stability grade are 6, resistance to
Aqueous and resistance to salt water is qualified, and coating is transparent, and viscosity is relatively low, and surface drying time is very fast；Coating prepared by the present invention it is each
Item performance is all good, meets the index request of building coating, can achieve the purpose that water proof anti-seepage, be widely used.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of coating that water resistance strong adhesive force is big, which is characterized in that its raw material includes by weight：15-30 parts of polyethers
220,3-9 parts of polyethers 3050,15-25 parts of diisocyanate, 30-50 parts of solvent mistures, 35-60 parts of double solvents, 0.5-1.5 parts
Antioxidant, 1-3 part dimethicone, 2-6 parts of dioctyl phthalates, 5-10 parts of bentonites；Wherein, the solvent misture
Including Petropols, coumarone indene resin, terpene resin；The double solvents includes ethyl acetate, 120# gasoline, toluene, acetone.
2. the big coating of water resistance strong adhesive force according to claim 1, which is characterized in that the Petropols, coumarone
Resin, terpene resin weight ratio be 3-10：1-3：5-9.
3. the big coating of water resistance strong adhesive force according to claim 1, which is characterized in that the ethyl acetate, 120# vapour
Oil, toluene, acetone weight ratio be 15-25：15-20：4-8：1-2.
4. a kind of preparation method according to any one of the claim 1-3 big coating of water resistance strong adhesive force, feature exists
In including the following steps：
S1, Polyether 220, polyethers 3050 are placed in reactor, decompression stirring dehydration is added diisocyanate, is stirred to react, obtains
Obtain prefabricated material A；
S2, at room temperature, the prefabricated material A that step 1 obtains, heating are added into double solvents, and stirring makes it completely dissolved, adding
Entering solvent misture, then stirring and dissolving sequentially adds antioxidant, dimethicone, dioctyl phthalate, bentonite,
Be stirred to react, be down to room temperature to get.
5. the preparation method of the big coating of water resistance strong adhesive force according to claim 4, which is characterized in that including walking as follows
Suddenly：
S1, Polyether 220, polyethers 3050 are placed in reactor, in the condition that temperature is 110-130 DEG C, pressure is -0.09MPa
Lower stirring is dehydrated 0.5-1h, is then cooled to 70-78 DEG C, and diisocyanate is added, is stirred to react 2-3h at 82-86 DEG C, obtains
Obtain prefabricated material A；
The prefabricated material A that step 1 obtains is added into double solvents by S2, at room temperature, is warming up to 40-60 DEG C, stirring makes it completely
Solvent misture is being added in dissolving, then it is pungent to sequentially add antioxidant, dimethicone, phthalic acid two for stirring and dissolving
Ester, bentonite are stirred to react 30-60min at 60-70 DEG C, be down to room temperature to get.
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| CN201810560626.6A CN108795275A (en) | 2018-05-25 | 2018-05-25 | A kind of coating and preparation method thereof that water resistance strong adhesive force is big |
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| CN201810560626.6A CN108795275A (en) | 2018-05-25 | 2018-05-25 | A kind of coating and preparation method thereof that water resistance strong adhesive force is big |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719187A (en) * | 2012-07-10 | 2012-10-10 | 湖北工程学院 | Single-component asphalt polyurethane waterproof coating and preparation method thereof |
| CN103756464A (en) * | 2013-12-13 | 2014-04-30 | 张家港市双林制墨涂装有限公司 | Waterproof paint, and preparation method thereof |
| CN105038685A (en) * | 2015-08-14 | 2015-11-11 | 上海应用技术学院 | Non-tar cable connector polyurethane waterproof sealant and preparation method thereof |
| CN107936815A (en) * | 2017-12-13 | 2018-04-20 | 苏州赛斯德工程设备有限公司 | A kind of high-strength polyurethane waterproof coating material and its preparation process |
-
2018
- 2018-05-25 CN CN201810560626.6A patent/CN108795275A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719187A (en) * | 2012-07-10 | 2012-10-10 | 湖北工程学院 | Single-component asphalt polyurethane waterproof coating and preparation method thereof |
| CN103756464A (en) * | 2013-12-13 | 2014-04-30 | 张家港市双林制墨涂装有限公司 | Waterproof paint, and preparation method thereof |
| CN105038685A (en) * | 2015-08-14 | 2015-11-11 | 上海应用技术学院 | Non-tar cable connector polyurethane waterproof sealant and preparation method thereof |
| CN107936815A (en) * | 2017-12-13 | 2018-04-20 | 苏州赛斯德工程设备有限公司 | A kind of high-strength polyurethane waterproof coating material and its preparation process |
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Application publication date: 20181113 |
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| WW01 | Invention patent application withdrawn after publication |