CN107474711A - Polyureas elastomer material and its application method - Google Patents

Polyureas elastomer material and its application method Download PDF

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Publication number
CN107474711A
CN107474711A CN201710672082.8A CN201710672082A CN107474711A CN 107474711 A CN107474711 A CN 107474711A CN 201710672082 A CN201710672082 A CN 201710672082A CN 107474711 A CN107474711 A CN 107474711A
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CN
China
Prior art keywords
component
elastomer material
polyureas
road surface
end group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710672082.8A
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Chinese (zh)
Inventor
李万峰
范洪展
祖晓阳
魏玉敏
贺晴
胡玉芹
高舒
朱学军
张娜
孟喜存
苏金才
卜宝峰
曹志国
王志强
赵兰义
石英爽
王文政
王强
葛峰
张媛
刘玉柱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hengshui Jinhu Traffic Technology Co Ltd
Original Assignee
Hengshui Jinhu Traffic Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hengshui Jinhu Traffic Technology Co Ltd filed Critical Hengshui Jinhu Traffic Technology Co Ltd
Priority to CN201710672082.8A priority Critical patent/CN107474711A/en
Publication of CN107474711A publication Critical patent/CN107474711A/en
Pending legal-status Critical Current

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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
    • C09D175/02—Polyureas
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3225—Polyamines
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/6505—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/32 or polyamines of C08G18/38
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34—Filling pastes
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/10—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for raising or levelling sunken paving; for filling voids under paving; for introducing material into substructure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2150/00—Compositions for coatings
    • C08G2150/90—Compositions for anticorrosive coatings

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

Polyureas elastomer material of the present invention and its application method, belong to gardens and build the road field.Its purpose is to provide a kind of service life length, comprehensive cost-effective, good weatherability, anti-corrosion, anti-skidding, high resiliency, environmentally friendly ground surface material and construction technology.It is 1 that polyureas elastomer material of the present invention, which includes mass ratio,：0.8~1.2 component A and B component；The component A is half polymers as made from Amino End Group and isocyanates reaction；The B component includes the mixture being made up of Amino End Group resin and Amino End Group chain extender, and does not contain hydroxyl and catalyst.Material property combination special construction technique of the present invention, make road surface with certain elasticity and with suitable coefficient of friction, and it is free from extraneous odour, pollution-free, curing rate is fast, 100% solidification, non-volatile, without conflux, it surface layer seamless, also can by hand be granulated, obtain pitted skin effect, good antiskid effect, it is corrosion-resistant, high temperature resistant, freeze-thawing resistant.

Description

Polyureas elastomer material and its application method
Technical field
Built the road field the invention belongs to gardens, more particularly to it is a kind of using high-molecular compound as the composition of base-material and its Application method.
Background technology
At present in Process of Urbanization Construction, as the improvement of people's living standards, the requirement day in the place for outdoor activity Benefit improves.Environmentally friendly, attractive in appearance, comfortable, hommization road surface becomes the focus in market.Pavement material selects and form structure is to step During passerby's walking comfort level and at heart imply have a great impact.Based on pedestrian traffic for paving material quite it is sensitive this One characteristic, polyureas elastomer material and its construction technology, pedestrian are not only met to comfortableness and the demand of sight, it is mated formation Honest texture afterwards also has natural landscape to bring out the best in each other.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of service life length, comprehensive cost-effective, good weatherability, prevent Rotten, anti-skidding, high resiliency, environmentally friendly ground surface material and construction technology.
The present invention relates to a kind of polyureas elastomer material, it is 1 that the polyureas elastomer material, which includes mass ratio,：0.8~1.2 A Component and B component；
The component A is half polymers as made from Amino End Group and isocyanates reaction；
The B component includes the mixture that is made up of Amino End Group resin and Amino End Group chain extender, and do not contain hydroxyl and Catalyst.
Preferably, the B component also contains pigment and auxiliary agent.
Preferably, the pigment is dark green；The auxiliary agent is surfactant.
Preferably, the surfactant is anionic surfactant, act as preventing sedimentation and the loose colour of color.
The invention further relates to a kind of application method of polyureas elastomer material, the described method comprises the following steps：
(1) check whether concrete road surface has breakage, if any breakage, then manual application is carried out to breakage with filler and scraped It is flat；Such as without breakage, then the operation of step (2) is directly carried out；
The filler is mixed to get for the quartz sand of two-component oiliness polyurethane and 80~120 mesh particle diameters；
(2) evenness of road surface is roughly ground and is finely ground on the road surface after being struck off to coating, and absorbs waste-powder；
(3) check whether road surface has expansion joint, if any expansion joint, then expansion seam is carried out to expansion joint with slot-cutting machine, joint-cutting is wide Degree adjusts saw blade as requested, and two-component oiliness polyurethane is then irrigated into seam；With angle grinder to filling point after the completion of perfusion Polishing, makes evenness of road surface；The operation of step (4) is directly carried out if without expansion joint；
(4) road surface for carrying out step (3) processing is scraped and primed；
The priming paint is one-component modified epoxy priming paint；The one-component modified epoxy mortar can go deep into coagulation quickly Soil table, and have very strong bonding force with polyureas surface layer, greatly enhance the abrasion resistance energy on polyureas road surface；
(5) component A of polyureas elastomer material and B component are mixed to ejection in the spray gun of spraying equipment, are sprayed onto step (4) On the road surface of processing, fast reaction is formed by curing elastomer film, and film coated surface grain is adjusted according to requirements in spraying process Footpath size.
Preferably, the spraying equipment is the spraying equipment of U.S.'s Graco.
The spraying equipment includes：Main frame, spray gun, mateiral pump wash rifle tank, heating and thermal insulation pipe, air press.
Preferably, the mass ratio of the quartz sand of two-component oiliness polyurethane and 80~120 mesh particle diameters is 1 in the filler： 0.05~0.5.
Polyureas elastomer material of the present invention and its application method difference from prior art are：
1st, surfactant is anionic surfactant in polyureas elastomer material of the invention, act as preventing color Sedimentation and loose colour.
2nd, in polyureas elastomer material application method of the invention, priming paint is one-component modified epoxy priming paint；The single group Part modified epoxy mortar can go deep into concrete earth's surface quickly, and have very strong bonding force with polyureas surface layer, greatly enhance poly- The abrasion resistance energy on urea road surface.
3rd, polyureas elastomer material of the invention, two ingredient elastic body material is formed by A, B component, sprayable in shabby coagulation Soil surface, it is intended to which the beautification for scenic spot road surface or shabby road surface is transformed；Material property combination special construction technique, makes road surface have There is certain elasticity and there is suitable coefficient of friction, and it is free from extraneous odour, pollution-free, curing rate is fast, and 100% solidifies, non-volatile, nothing It conflux, surface layer seamless, also can by hand be granulated, obtain pitted skin effect, good antiskid effect is corrosion-resistant, high temperature resistant, freeze-thawing resistant；Spray After being applied to road surface, service life length is comprehensive cost-effective, good weatherability, anti-corrosion, anti-skidding, high resiliency, environment-friendly, with basic unit Or former road surface bonding is closely.
Brief description of the drawings
Fig. 1 be polyureas elastomer material of the present invention application method in step (1) construction drawing；
Fig. 2 be polyureas elastomer material of the present invention application method in step (2) construction drawing；
The construction drawing that Fig. 3 stitches for expansion in step (3) in the application method of polyureas elastomer material of the present invention；
Fig. 4 is the middle construction drawing irrigated of step (3) in the application method of polyureas elastomer material of the present invention；
Fig. 5 be polyureas elastomer material of the present invention application method in step (4) construction drawing；
Fig. 6 be polyureas elastomer material of the present invention application method in step (5) construction drawing.
Embodiment
The polyureas elastomer material and its application method of the present invention are made by following examples and checking test further Explanation.
Embodiment 1
The polyureas elastomer material of the present embodiment be by mass ratio be 1：0.8 component A and B component composition；
Component A is half polymers as made from Amino End Group and isocyanates reaction；
B component includes the mixture being made up of Amino End Group resin and Amino End Group chain extender, and does not contain hydroxyl and catalysis Agent；
Anionic surfactant and dark green are also added into B component so that whole polyureas elastomer material is in green Color, specific color can be adjusted the selection of pigment as needed.
Embodiment 2
The polyureas elastomer material of the present embodiment be by mass ratio be 1：1.2 component A and B component composition；
Component A is half polymers as made from Amino End Group and isocyanates reaction；
B component includes the mixture being made up of Amino End Group resin and Amino End Group chain extender, and does not contain hydroxyl and catalysis Agent；
Anionic surfactant and dark green are also added into B component so that whole polyureas elastomer material is in green Color, specific color can be adjusted the selection of pigment as needed.
Embodiment 3
The polyureas elastomer material of the present embodiment be by mass ratio be 1：1 component A and B component composition；
Component A is half polymers as made from Amino End Group and isocyanates reaction；
B component includes the mixture being made up of Amino End Group resin and Amino End Group chain extender, and does not contain hydroxyl and catalysis Agent；
Anionic surfactant and dark green are also added into B component so that whole polyureas elastomer material is in green Color, specific color can be adjusted the selection of pigment as needed.
Half polymers as made from Amino End Group and isocyanates reaction is purchased from Qingdao Ai Erjiajia new material stocks in embodiment 1-3 Part Co., Ltd, the mixture being made up of Amino End Group resin and Amino End Group chain extender have purchased from Qingdao Ai Erjiajia new material shares Limit company.
Embodiment 4
The application method of the polyureas elastomer material of the present embodiment is carried out according to the following steps：
(1) check whether concrete road surface has breakage, if any breakage, then manual application is carried out to breakage with filler and scraped It is flat；Such as without breakage, then the operation of step (2) is directly carried out；
The filler is mixed to get for the quartz sand of two-component oiliness polyurethane and 80~120 mesh particle diameters；It is double in filler The mass ratio of the quartz sand of component oiliness polyurethane and 80~120 mesh particle diameters is 1：0.05；
(2) evenness of road surface is roughly ground and is finely ground on the road surface after being struck off to coating, and absorbs waste-powder；
(3) check whether road surface has expansion joint, if any expansion joint, then expansion seam is carried out to expansion joint with slot-cutting machine, joint-cutting is wide Degree adjusts saw blade as requested, and two-component oiliness polyurethane is then irrigated into seam；With angle grinder to filling point after the completion of perfusion Polishing, makes evenness of road surface；The operation of step (4) is directly carried out if without expansion joint；
(4) road surface for carrying out step (3) processing is scraped and primed；
The priming paint is one-component modified epoxy priming paint；The one-component modified epoxy mortar can go deep into coagulation quickly Soil table, and have very strong bonding force with polyureas surface layer, greatly enhance the abrasion resistance energy on polyureas road surface；
(5) component A of polyureas elastomer material in embodiment 1-3 and B component are mixed to ejection in the spray gun of spraying equipment, It is sprayed onto on the road surface of step (4) processing, fast reaction is formed by curing elastomer film (only needing 5~10min), root in spraying process Film coated surface particle size is adjusted according to requirement.
Wherein, two-component oiliness polyurethane builds Materials Co., Ltd purchased from red widen in Shanghai, one-component modified epoxy Priming paint is purchased from Beijing Forbidden City Qi Ye Co., Ltds.
Embodiment 5
The difference of the application method and embodiment 4 of the polyureas elastomer material of the present embodiment is：Two-component in filler The mass ratio of the quartz sand of oiliness polyurethane and 80~120 mesh particle diameters is 1：0.5.
Checking test
Following test is carried out to the basic performance on the road surface after being sprayed in embodiment 4, as a result as shown in table 1.
The basic performance test result of table 1
Understand that material of the invention is sprayable in shabby concrete road surface, it is intended to for scenic spot road surface by above-mentioned checking Or the beautification transformation on shabby road surface；Material property combination special construction technique, make the road surface with certain elasticity and with suitably Coefficient of friction, and it is free from extraneous odour, pollution-free, curing rate is fast, and 100% solidification, non-volatile, no conflux, surface layer seamless also can hand Work is granulated, and obtains pitted skin effect, good antiskid effect is corrosion-resistant, high temperature resistant, freeze-thawing resistant；After being sprayed at road surface, service life length, It is comprehensive cost-effective, good weatherability, anti-corrosion, anti-skidding, high resiliency, environment-friendly, it is Nian Jie with basic unit or former road surface closely.
Although the foregoing describing the embodiment of the present invention, it will be appreciated by those of skill in the art that these It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back On the premise of principle and essence from the present invention, various changes or modifications can be made to these embodiments, but these are changed Protection scope of the present invention is each fallen within modification.

Claims (7)

  1. A kind of 1. polyureas elastomer material, it is characterised in that：It is 1 that the polyureas elastomer material, which includes mass ratio,：0.8~1.2 A groups Point and B component；
    The component A is half polymers as made from Amino End Group and isocyanates reaction；
    The B component includes the mixture being made up of Amino End Group resin and Amino End Group chain extender, and does not contain hydroxyl and catalysis Agent.
  2. 2. polyureas elastomer material according to claim 1, it is characterised in that：The B component also contains pigment and auxiliary agent.
  3. 3. polyureas elastomer material according to claim 2, it is characterised in that：The pigment is dark green；The auxiliary agent is Surfactant.
  4. 4. polyureas elastomer material according to claim 3, it is characterised in that：The surfactant is anionic surface Activating agent.
  5. A kind of 5. application method of polyureas elastomer material, it is characterised in that：It the described method comprises the following steps：
    (1) check whether concrete road surface has breakage, if any breakage, then manual application is carried out to breakage with filler and struck off；Such as Without breakage, then the operation of step (2) is directly carried out；
    The filler is mixed to get for the quartz sand of two-component oiliness polyurethane and 80~120 mesh particle diameters；
    (2) evenness of road surface is roughly ground and is finely ground on the road surface after being struck off to coating, and absorbs waste-powder；
    (3) check whether road surface has expansion joint, if any expansion joint, then expansion seam is carried out to expansion joint with slot-cutting machine, then into seam Irrigate two-component oiliness polyurethane；Filling point is polished with angle grinder after the completion of perfusion, makes evenness of road surface；If without expansion joint Directly carry out the operation of step (4)；
    (4) road surface for carrying out step (3) processing is scraped and primed；
    The priming paint is one-component modified epoxy priming paint；
    (5) component A of polyureas elastomer material and B component are mixed to ejection in the spray gun of spraying equipment, are sprayed onto step (4) processing Road surface on, be formed by curing elastomer film.
  6. 6. the application method of polyureas elastomer material according to claim 5, it is characterised in that：The spraying equipment is the U.S. The spraying equipment of Graco.
  7. 7. the application method of polyureas elastomer material according to claim 5, it is characterised in that：Two-component oil in the filler Property polyurethane and 80~120 mesh particle diameters quartz sand mass ratio be 1：0.05~0.5.
CN201710672082.8A 2017-08-08 2017-08-08 Polyureas elastomer material and its application method Pending CN107474711A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109958201A (en) * 2019-03-11 2019-07-02 上海艾弗森建设工程有限公司 A kind of spray polyurea Waterproof Construction Technique
CN112280448A (en) * 2020-10-28 2021-01-29 中国石油化工集团有限公司 Anticorrosive polyurea coating for petrochemical industry and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102702475A (en) * 2012-01-05 2012-10-03 北京东方雨虹防水技术股份有限公司 High-mechanical-property aliphatic spray polyurea elastomer and preparation method and construction method thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102702475A (en) * 2012-01-05 2012-10-03 北京东方雨虹防水技术股份有限公司 High-mechanical-property aliphatic spray polyurea elastomer and preparation method and construction method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨永起: "《新型地坪材料实用技术手册》", 30 November 2007, 中国计量出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109958201A (en) * 2019-03-11 2019-07-02 上海艾弗森建设工程有限公司 A kind of spray polyurea Waterproof Construction Technique
CN112280448A (en) * 2020-10-28 2021-01-29 中国石油化工集团有限公司 Anticorrosive polyurea coating for petrochemical industry and preparation method thereof
CN112280448B (en) * 2020-10-28 2021-11-12 中国石油化工集团有限公司 Anticorrosive polyurea coating for petrochemical industry and preparation method thereof

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Application publication date: 20171215