CN106519980A - Production method of non-curable asphalt waterproof coating - Google Patents
Production method of non-curable asphalt waterproof coating Download PDFInfo
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- CN106519980A CN106519980A CN201611000047.3A CN201611000047A CN106519980A CN 106519980 A CN106519980 A CN 106519980A CN 201611000047 A CN201611000047 A CN 201611000047A CN 106519980 A CN106519980 A CN 106519980A
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- production method
- asphalt
- stirring
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- rubber
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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
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
-
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- 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)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
- Road Paving Structures (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the field of asphalt modification production, and more specifically relates to a production method of a non-curable asphalt waterproof coating. The production method comprises following steps: an asphalt raw material and a colloidal residual oil are stirred and blended so as to obtain a matrix asphalt; the matrix asphalt is heated, 5 to 15% of a modifying agent is added, 5 to 15% of a stabilizing agent and 2 to 5% of an accessory ingredient are added via colloid mill uniform shearing and stirring, and the temperature is maintained to be higher than 180 DEG C; after modification, an obtained material is delivered into a reaction tank, the temperature is controlled to be equal to or higher than 150 DEG C, and equal to or lower than 175 DEG C, and the non-curable asphalt waterproof coating is obtained via reaction. According to the production method, performance of asphalt modified products can be maintained preferably via adding of the modifying agent, the accessory ingredient, and the stabilizing agent.
Description
Technical field
The invention belongs to asphalt modification production field, specifically a kind of producer of uncured asphalt waterproofing paint
Method.
Background technology
Uncured rubber asphalt waterproof coating was produced by a kind of external waterproof material introduced in the beginning of this century
Product.Through market expansion application for many years, by engineer applied and key project construction verification, uncured rubber-asphalt waterproof
Coating with its distinctive technical performance and waterproof applications feature, increasingly by waterproof engineering design, engineering construction side and vast
The accreditation and trust of user.Uncured rubber asphalt water-repellent paint is mainly passed through by raw and auxiliary materials such as rubber powder, Colophonium, additives
It is formulated.Mainly there are two types：A kind of is highly filled product, up to 99%, main to be constructed using hot melting spraying
Mode；A kind of is the product containing high boiling solvent, and solids content can be scratched with room temperature more than 80%.Due to coating its
It is highly filled that body has so that respective performance can be sent out in the state of relatively stable by each component in formulation for coating material
The degree of maximum is waved, so as to effectively increase solidfied material content, system stability and the properties of product of coating.Uncured rubber
Asphalt waterproofing paint can be used separately as one waterproof layer, or can combine as composite water-proof with waterproof roll
Layer is using.But when using as one waterproof layer, coating must be used in non-exposed occasion, and is protected using sealing coat
Shield.When using as complex waterproof layer when combining with waterproof roll, then buildings waterproof " hard and soft knot more can be embodied
Close " design concept, it may be said that be safer reliable water-proof system, waterproofing quality can obtain certain guarantee.
Uncured rubber asphalt waterproof coating can be not only used for newly-built waterproof layer, it can also be used to repair impaired waterproof layer；Can be not only used for routine
The waterproof in region, it can also be used to which the waterproof of the special area such as movement joint, relative to other waterproof materials, it is prevented to special area
Water has unique advantage.Simultaneously as uncured rubber asphalt waterproof coating need not do maintenance process to waterproof layer, greatly shorten
Waterproof construction phase.The key property of uncured rubber asphalt waterproof coating is as follows：
(1) coating can both do coating waterproof, paste waterproof roll but also as adhesive, form structure composite waterproof layer；
(2) after coating is with base adhesive, " skin-type " water proof structure can be formed, has effectively prevented the generation of channeling water phenomenon.
(3) coating can be constructed on wet base, and this creates good bar for the waterproofing for basement reduction of erection time
Part.
(4) coating application tool multiformity and convenience, can both scrape and smear construction, and sprayable construction, and by seasonal effect
Can construction operation.
(5) coating has splendid adaptability to malformation, and material behavior is determined will not be caused because of malformation
The breakage of waterproof layer, it is ensured that whole complex waterproof layer keeps integrity for a long time.
Uncured rubber asphalt waterproof coating due to good water resistance, croop property, adhesive property and from
More various features such as function, engineering construction safety are reliable, environment friendly and pollution-free.Especially to special sections such as wet base, movement joints
The suitability in domain is higher.When being combined as waterproof layer with coiled material, its applied widely, good water-proof effect, low engineering cost, tool
There is the preferable market competitiveness, it is believed that can fully develop talents in construction waterproofing engineering application from now on, with wide market
Promotion prospect.
The content of the invention
The purpose of the present invention is to overcome uncured asphalt waterproofing paint product preparation process is loaded down with trivial details, properties of product are poor at present etc.
A kind of problem, there is provided production method of uncured asphalt waterproofing paint.
The solution of the present invention is by being achieved in that：A kind of production method of uncured asphalt waterproofing paint, it is described
Method is comprised the following steps：
1) matrix pitch allotment：Asphalt stock is compared into 100kg according to weight with colloid residual oil:10 ~ 15kg stirring mediations obtain base
Matter Colophonium;
2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining is in 150 DEG C of temperature 10 ~ 30min of bath, then heat up 190～
Add 5 ~ 15% modifying agent after 200 DEG C while stirring, stir 15 ~ 20min；Again through colloid mill homogeneous shear stirring add 5 ~
15% stabilizer and 2 ~ 5% auxiliary agents, temperature are maintained at more than 180 DEG C, 8 ~ 20min of stirring；
3）Development adjustment：By step 2）Modified material sends into development tank, 150 DEG C≤temperature control≤175 DEG C, develops 10 ~ 12h
Obtain uncured asphalt waterproofing paint.
Used as the further restriction of the present invention, described auxiliary agent is containing 5 ~ 10%4A zeolite Na12Al12Si12O48·27H2O、2
~ 8% mica powder, 2 ~ 5% lamina sodium silicates, 2 ~ 5% polyacrylic acid, 2 ~ 5% glass fibre, the furfural extract oil of 2 ~ 5% sodium metasilicates.
The mica powder its chemical analysis composition such as following table.
The glass fibre：Granular size is 50 ~ 100 mesh, containing sodium oxide 0%～2%.
Used as the further restriction of the present invention, described modifying agent is linear SBS modifier, in star shaped SBS modifying agent
A kind of or their mixing.
Used as the further restriction of the present invention, described stabilizer is the rubber containing 1.5 ~ 3% sulfur, 2 ~ 5% Zinc Oxide.
Used as the further restriction of the present invention, described rubber is butyl rubber, ethylene propylene diene rubber, nitrile rubber, suitable
One kind or their mixture in buna.
The present invention compared with prior art, have the advantage that for：
1. auxiliary agent is used, is accelerated the oxidation modification time of tar asphalt, has been saved the time of production process.
2. during producing this product, the performance that modifying agent, auxiliary agent, stabilizer cause the modified product of coal tar pitch with the addition of
Preferably maintained.
3rd, modified additive introduces a small amount of mica powder, glass fibre, in the modification process to water-repellent paint Colophonium, increases
Strong asphalt waterproofing performance so as to reach the relevant national standard of waterproof material.
Specific embodiment
Uncured asphalt waterproofing paint production method of the invention is described with reference to embodiments, these descriptions are not to this
The content of the invention is further limited.
The mica powder that following examples are used：Granular size be 40 ~ 60 mesh, 40-48%SiO2, 30-32%Al2O3, 9-11%
K2O, 1.1-1.5%Na2O, 1.5-1.8%MgO, 3.5-5.0%Fe2O3, 0.02-0.05%S+P, 0.03%H2O。
Glass fibre：Granular size is 50 ~ 100 mesh, containing sodium oxide 0%～2%.
Embodiment 1
The present embodiment auxiliary agent：The Na of zeolite containing 5%4A12Al12Si12O48·27H2O, 8% mica powder, 2% lamina sodium silicate, 5% polypropylene
Acid, 5% glass fibre, the furfural extract oil of 2% sodium metasilicate.Modifying agent is linear SBS modifier.Stabilizer is containing 1.5% sulfur
The butyl rubber of sulphur, 5% Zinc Oxide.
Present implementation is comprised the following steps：1) matrix pitch allotment：By asphalt stock with colloid residual oil according to weight ratio
100kg:10kg stirring mediations obtain matrix pitch;2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining exists
150 DEG C of temperature bath 10min, then the modifying agent for adding 15% after 190～200 DEG C while stirring that heats up, stir 15min；Again through colloid
Mill homogeneous shear stirring adds 15% stabilizer and 5% auxiliary agent, temperature to be maintained at more than 180 DEG C, stirring 20min；3）Development adjustment：
By step 2）Modified material sends into development tank, and 150 DEG C≤temperature control≤175 DEG C, development 12h obtains uncured asphalt waterproofing
Coating.
Embodiment 2
The present embodiment auxiliary agent：The Na of zeolite containing 10%4A12Al12Si12O48·27H2O, 2% mica powder, 5% lamina sodium silicate, 2% poly- third
Olefin(e) acid, 2% glass fibre, the furfural extract oil of 5% sodium metasilicate.Modifying agent is star shaped SBS modifying agent.Stabilizer is containing 3% sulfur
The nitrile rubber of sulphur, 2% Zinc Oxide.
Present implementation is comprised the following steps：1) matrix pitch allotment：By asphalt stock with colloid residual oil according to weight ratio
100kg:15kg stirring mediations obtain matrix pitch;2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining exists
150 DEG C of temperature bath 30min, then the modifying agent for adding 5% after 190～200 DEG C while stirring that heats up, stir 20min；Again through colloid
Mill homogeneous shear stirring adds 5% stabilizer and 2% auxiliary agent, temperature to be maintained at more than 180 DEG C, stirring 8min；3）Development adjustment：Will
Step 2）Modified material sends into development tank, and 150 DEG C≤temperature control≤175 DEG C, development 10h obtains uncured asphalt waterproofing and applies
Material.
Embodiment 3
The present embodiment auxiliary agent：The Na of zeolite containing 7%4A12Al12Si12O48·27H2O, 5% mica powder, 2.5% lamina sodium silicate, 2.5% gather
Acrylic acid, 2.5% glass fibre, the furfural extract oil of 3% sodium metasilicate.Modifying agent be linear SBS modifier, star shaped SBS according to
Quality 1：1 mixing.Stabilizer is the butadiene rubber containing 2% sulfur, 2.5% Zinc Oxide.
Present implementation is comprised the following steps：1) matrix pitch allotment：By asphalt stock with colloid residual oil according to weight ratio
100kg:13kg stirring mediations obtain matrix pitch;2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining exists
150 DEG C of temperature bath 20min, then the modifying agent for adding 10% after 190～200 DEG C while stirring that heats up, stir 18min；Again through colloid
Mill homogeneous shear stirring adds 10% stabilizer and 2.5% auxiliary agent, temperature to be maintained at more than 180 DEG C, stirring 12min；3）Development is adjusted
It is whole：By step 2）Modified material sends into development tank, and 150 DEG C≤temperature control≤175 DEG C, development 11h obtains uncured Colophonium
Water-repellent paint.
Embodiment 4
The present embodiment auxiliary agent：The Na of zeolite containing 6%4A12Al12Si12O48·27H2O, 7% mica powder, 3% lamina sodium silicate, 4% polypropylene
Acid, 2.5% glass fibre, the furfural extract oil of 5% sodium metasilicate.Modifying agent is star shaped SBS modifying agent.Stabilizer is containing 2% sulfur
Sulphur, 4.5% Zinc Oxide ethylene propylene diene rubber.
Present implementation is comprised the following steps：1) matrix pitch allotment：By asphalt stock with colloid residual oil according to weight ratio
100kg:12kg stirring mediations obtain matrix pitch;2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining exists
150 DEG C of temperature bath 20min, then the modifying agent for adding 7% after 190～200 DEG C while stirring that heats up, stir 20min；Again through colloid
Mill homogeneous shear stirring adds 9% stabilizer and 3.5% auxiliary agent, temperature to be maintained at more than 180 DEG C, stirring 18min；3）Development is adjusted
It is whole：By step 2）Modified material sends into development tank, and 150 DEG C≤temperature control≤175 DEG C, development 12h obtains uncured Colophonium
Water-repellent paint.
Embodiment 5
The present embodiment auxiliary agent：The Na of zeolite containing 5%4A12Al12Si12O48·27H2O, 8% mica powder, 3% lamina sodium silicate, 7.5% poly- third
Olefin(e) acid, 5% glass fibre, the furfural extract oil of 3.5% sodium metasilicate.Modifying agent is star shaped SBS modifying agent.Stabilizer is containing 2% sulfur
The nitrile rubber of sulphur, 3.5% Zinc Oxide.
Present implementation is comprised the following steps：1) matrix pitch allotment：By asphalt stock with colloid residual oil according to weight ratio
100kg:15kg stirring mediations obtain matrix pitch;2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining exists
150 DEG C of temperature bath 10min, then the modifying agent for adding 5% after 190～200 DEG C while stirring that heats up, stir 20min；Again through colloid
Mill homogeneous shear stirring adds 8.5% stabilizer and 5% auxiliary agent, temperature to be maintained at more than 180 DEG C, stirring 15min；3）Development is adjusted
It is whole：By step 2）Modified material sends into development tank, and 150 DEG C≤temperature control≤175 DEG C, development 11h obtains uncured Colophonium
Water-repellent paint.
The asphalt waterproofing paint performance that above example is prepared is as follows：
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Viscosity（PQ、S） | 0.2-0.4 | 0.3-0.5 | 0.25-0.4 | 0.4-0.55 | 0.35-0.6 |
| Thermostability（90 DEG C of constant temperature 5h） | Do not trickle | Do not trickle | Do not trickle | Do not trickle | Do not trickle |
| Water penetration（Flowing hydraulic pressure 0.1-0.2MPa0.5h） | It is waterproof | It is waterproof | It is waterproof | It is waterproof | It is waterproof |
| Crack resistance（Basic crack width≤2mm） | Film does not split | Film does not split | Film does not split | Film does not split | Film does not split |
| Tensile strength | 6.5MPa | 3.5MPa | 5.5MPa | 6.5MPa | 4.5MPa |
| Elongation percentage | 380%-400% | 280%-350% | 280%-400% | 350%-380% | 380%-420% |
| The dried coating film time（h） | ≤2-24 | ≤2-24 | ≤2-24 | ≤2-24 | ≤2-24 |
The above embodiment of the present invention scheme is only the description of the invention and can not limit the present invention, and this is indicated in claim
Invention product form composition, component ratio, the scope of preparation method parameter, and parameter of the present invention is not pointed out in above-mentioned explanation
Scope, therefore, any change in the implication and scope suitable with claims of the present invention, be all considered to be including
In the range of claims.
Claims (5)
1. a kind of production method of uncured asphalt waterproofing paint, it is characterised in that described method is comprised the following steps：
1) matrix pitch allotment：Asphalt stock is compared into 100kg according to weight with colloid residual oil:10 ~ 15kg stirring mediations obtain base
Matter Colophonium;
2) be modified processing：By step 1）The matrix pitch heating-up temperature for obtaining is in 150 DEG C of temperature 10 ~ 30min of bath, then heat up 190～
Add 5 ~ 15% modifying agent after 200 DEG C while stirring, stir 15 ~ 20min；Again through colloid mill homogeneous shear stirring add 5 ~
15% stabilizer and 2 ~ 5% auxiliary agents, temperature are maintained at more than 180 DEG C, 8 ~ 20min of stirring；
3）Development adjustment：By step 2）Modified material sends into development tank, 150 DEG C≤temperature control≤175 DEG C, develops 10 ~ 12h
Obtain uncured asphalt waterproofing paint.
2. the production method of a kind of uncured asphalt waterproofing paint according to claim 1, it is characterised in that described helps
Agent is containing 5 ~ 10%4A zeolite Na12Al12Si12O48·27H2O, 2 ~ 8% mica powders, 2 ~ 5% lamina sodium silicates, 2 ~ 5% polyacrylic acid, 2
The furfural extract oil of ~ 5% glass fibre, 2 ~ 5% sodium metasilicates.
3. the production method of a kind of uncured asphalt waterproofing paint according to claim 1, it is characterised in that described changes
Property agent is linear SBS modifier, the one kind in star shaped SBS modifying agent or their mixing.
4. the production method of a kind of uncured asphalt waterproofing paint according to claim 1, it is characterised in that described is steady
It is the rubber containing 1.5 ~ 3% sulfur, 2 ~ 5% Zinc Oxide to determine agent.
5. a kind of production method of uncured asphalt waterproofing paint according to claim 4, it is characterised in that described rubber
Glue is butyl rubber, ethylene propylene diene rubber, nitrile rubber, the one kind in butadiene rubber or their mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611000047.3A CN106519980B (en) | 2016-11-14 | 2016-11-14 | A kind of production method of uncured asphalt waterproofing paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611000047.3A CN106519980B (en) | 2016-11-14 | 2016-11-14 | A kind of production method of uncured asphalt waterproofing paint |
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| Publication Number | Publication Date |
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| CN106519980A true CN106519980A (en) | 2017-03-22 |
| CN106519980B CN106519980B (en) | 2019-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115703930A (en) * | 2021-08-05 | 2023-02-17 | 云南昆明雨霸建筑防水材料有限公司 | Production method of modified asphalt |
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| US20090283012A1 (en) * | 2007-05-04 | 2009-11-19 | Stanley W. Ellis | Addition of Spent Activated Carbon to Asphalt Compositions and to Coking Units as Feedstock or Quencher |
| CN102993755A (en) * | 2011-09-14 | 2013-03-27 | 路翔股份有限公司 | Modified asphalt, its preparation method, and asphalt concrete |
| CN104194629A (en) * | 2014-09-11 | 2014-12-10 | 北京东方雨虹防水技术股份有限公司 | Non-cured rubber asphalt waterproofing coating with flame retardance property and preparation method thereof |
| CN104530979A (en) * | 2015-01-30 | 2015-04-22 | 浙江春明防水建材有限公司 | Non-curing rubberized asphalt waterproof paint |
| CN105542662A (en) * | 2016-01-18 | 2016-05-04 | 北京远大洪雨防水材料有限责任公司 | Non-curable root puncture-resistant waterproof coating and preparation method thereof |
-
2016
- 2016-11-14 CN CN201611000047.3A patent/CN106519980B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090283012A1 (en) * | 2007-05-04 | 2009-11-19 | Stanley W. Ellis | Addition of Spent Activated Carbon to Asphalt Compositions and to Coking Units as Feedstock or Quencher |
| CN102993755A (en) * | 2011-09-14 | 2013-03-27 | 路翔股份有限公司 | Modified asphalt, its preparation method, and asphalt concrete |
| CN104194629A (en) * | 2014-09-11 | 2014-12-10 | 北京东方雨虹防水技术股份有限公司 | Non-cured rubber asphalt waterproofing coating with flame retardance property and preparation method thereof |
| CN104530979A (en) * | 2015-01-30 | 2015-04-22 | 浙江春明防水建材有限公司 | Non-curing rubberized asphalt waterproof paint |
| CN105542662A (en) * | 2016-01-18 | 2016-05-04 | 北京远大洪雨防水材料有限责任公司 | Non-curable root puncture-resistant waterproof coating and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115703930A (en) * | 2021-08-05 | 2023-02-17 | 云南昆明雨霸建筑防水材料有限公司 | Production method of modified asphalt |
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| CN106519980B (en) | 2019-02-01 |
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Effective date of registration: 20230414 Address after: 535008 Guozi mountain operation area, Qinzhou Port Economic Development Zone, Qinzhou City, Guangxi Zhuang Autonomous Region Patentee after: GUANGXI XINTIANDE ENERGY Co.,Ltd. Address before: 535004 Guoying Avenue, Qinzhou Port Economic Development Zone, Qinzhou City, Guangxi Zhuang Autonomous Region Patentee before: GUANGXI HONGDA BIO-ENERGY TECHNOLOGY CO.,LTD. |