CN108624160A - I type polymer cement waterproof paint of one kind and preparation method thereof - Google Patents
I type polymer cement waterproof paint of one kind and preparation method thereof Download PDFInfo
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- CN108624160A CN108624160A CN201810560154.4A CN201810560154A CN108624160A CN 108624160 A CN108624160 A CN 108624160A CN 201810560154 A CN201810560154 A CN 201810560154A CN 108624160 A CN108624160 A CN 108624160A
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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
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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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
- 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
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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
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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Abstract
The invention discloses a kind of I type polymer cement waterproof paint and preparation method thereof, the coating includes that the weight part ratio of mixed liquid and mixed powder is：90‑110：70 90, mixed liquid includes elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：The weight part ratio of fungicide is followed successively by：95‑105：3‑7：0.1‑0.2：0.05‑0.15：0.15‑0.25：0.06‑0.15；Mixed powder includes 32.5 cement：40 90 mesh fire stons sands：600 mesh powdered whitings：How the weight part ratio of based water reducer is 110 130：90‑110：90‑110：1.5‑3.5.The I type polymer cement waterproof paint of the present invention, break-draw rate realizes " double height " with tensile strength, technically breach the negative correlativing relation of extensibility and tensile strength, its elongation at break is up to 247%, 23.5% is improved compared to international standard 200%, also maintains the tensile strength of the superelevation of 2.3MP（It is 1.9 times of national standard）, the stretching requirement at deformation joint of roof position can be met well and meet the anti-needs trampled of roof waterproof layer well.
Description
Technical field
The present invention relates to cement paint technical fields, more particularly to a kind of I type polymer cement waterproof paint and its preparation
Method.
Background technology
At present in the construction project in China city, buildings waterproof is a comprehensive, very strong engineering technology of practicability,
The use function of architectural engineering is played a crucial role.Leakage problem, which has not only seriously affected the normal of building, to be made
With, and the durability of building structure is influenced, or even cause serious consequence.
It is main former that polymer cement waterproof paint, which is with the polymer such as acrylate, ethane-acetic acid ethyenyl ester and cement,
Material adds the double-component aqueous environmentally friendly class building water-proof paint that filler and other additives are formulated.It is that one kind having both water
Divide the Environmental-protecwaterproof waterproof paint of volatilization solidification and reaction solidification dual characteristics.By liquid material, powder stirring at coating shape after, polymer
Lotion wraps up cement granules, the moisture evaporation in lotion, and high molecular particle is made to be dehydrated and be sticked together, and is formed continuous
Elastoplasticity film；On the other hand, cement absorbs the moisture in lotion, and hydration reaction occurs and cures, poly- with organic polymer
It closes object chain to be interleaved with each other, collectively constitutes the high-strength flexibility waterproof coating of organo-mineral complexing.Its existing polymer coating film is excellent
Extensibility, water proofing property, and have the characteristic that hydraulic material intensity is high, water-fast and anti-aging.Maintaining inorganic silicate material
On the basis of expecting that ageing resistance is strong, intensity hardness is big, water-tolerant, bonding force are strong, and high-molecular organic material change is introduced
The advantages of shape is good, structure closure is strong, product is easily brushed.The waterproof thought tempered toughness with gentleness is set to have obtained satisfactory embodiment.
China is initially entered from last century the mid-80 polymer cement waterproof paint, continuous with environmentally friendly dynamics adds
Big and product itself plurality of advantages, is gradually recognized, has obtained faster development, product is put into the Ministry of Construction's " house
Building recommends waterproof material product " " scientific and technological achievement key popularized project ".Country has promulgated JC/T894-2001 industries within 2001
Standard has promulgated GB/T-23445-2009 national standards in 2009 again.
It is found in anti-shipwreck disease is studied, steel structure roofing heat absorptivity is fabulous, and summer temp is high, in the effect of strong wind and heavy rain
Lower bulging big rise and fall, the especially oxygen blast cyanidation at piece position are very big, four seasons temperature deformation is also very big.Eaves gutter is poured water phenomenon
It is common.The water-proof and anti-corrosive material of steel structure roofing must be provided simultaneously with it is uprising shine, low temperature resistant, bonding force is strong, it is anti-trample, drawing coefficient
The big anti-tear 5 big features such as pull.To product analysis common in the market as it can be seen that SBS coiled material heat resistances are low, drawing coefficient is small, bonding
Power is weak, cannot be tightly bonded with the steel structure roofing of moulding complexity, does not have antiseptic property；General polymer cement waterproof paint and
The not uprising solarization of polyurethane；Organosilicon bonding force is weak, not anti-to trample.The waterproof and anticorrosion of steel structure roofing at anti-hydrosphere at that time difficulty
Point.
Invention content
In order to solve the above-mentioned technical problem, the embodiment of the present invention propose a kind of I type polymer cement waterproof paint and its
Preparation method realizes break-draw rate and the double height of tensile strength, technically breaches the negative of extensibility and tensile strength
Pass relationship.Meet uprising solarization that steel structure roof waterproof anti-corrosion material must be provided simultaneously with, low temperature resistant, bonding force is strong, it is anti-trample,
The big anti-tear big feature of five pulled of drawing coefficient
To achieve the goals above, the technical scheme is that：
A kind of I type polymer cement waterproof paint, including liquid and mixed powder are mixed, the weight part ratio of the mixed liquid and mixed powder is：90-
110：70-90,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：95-105：3-7：0.1-0.2：0.05-0.15：0.15-0.25：0.06-0.15；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh quartz sands：600 mesh powdered whitings：How be
The weight part ratio of water-reducing agent is 110-130：90-110：90-110：1.5-3.5.
Preferably：The weight part ratio of the mixed liquid and mixed powder is：100:80.
Preferably：The elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：The weight part ratio of fungicide
For：100：5：0.15：0.1：0.2:0.1.
Preferably：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How the weight of based water reducer
Part is than being 120：100：100：2.2.
The elastic water-proof lotion is interpolymer latex of polystyrene and acrylic ester.
The DA types dispersant category anionic polycarboxylates type.
32.5 cement are Portland cement
Preferably：Water-reducing agent be how be powdered water-reducing agent.
Preferably：Antifoaming agent is SPA-202 antifoaming agent, and the antifoaming agent defoaming effect is good, and does not generate shrinkage cavity.
Preferably：A kind of I type polymer cement waterproof paint, including mixed liquid and mixed powder, the weight of the mixed liquid and mixed powder
Portion rate is：100：80,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：100：5：0.15：0.1：0.2：0.1；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 120：100：100：2.2.
The preparation process of any of the above-described polymer cement waterproof paint, raw material is directly mixed.
The beneficial effects of the invention are as follows：
I claimed type polymer cement waterproof paint of the embodiment of the present invention, break-draw rate realize double with tensile strength
Height technically breaches the negative correlativing relation of extensibility and tensile strength, and elongation at break is up to 247%, is marked compared to the world
Standard 200% improves 23.5%, also maintains the tensile strength of the superelevation of 2.3MP（It is 1.9 times of national standard）, roofing change can be met
Shape stitches the stretching requirement at position, and can meet the anti-needs trampled of roof waterproof layer, national standard low temperature flexibility be by (- 10 DEG C),
The claimed polymer cement waterproof paint of the embodiment of the present invention has passed through -17 DEG C.
The uprising solarization that must be provided simultaneously with present invention accomplishes steel structure roof waterproof anti-corrosion material, low temperature resistant, bonding force is strong,
It is anti-trample, the big anti-tear big feature of five pulled of drawing coefficient, filled up the deficiency of other water-repellent paints.
2, I claimed type polymer cement waterproof paint of the embodiment of the present invention, super quality and competitive price are conducive to promote waterproof
The change of material is conducive to a wide range of popularization to civil engineering.
3, this product the waterproof and anticorrosion of steel structure roofing it is on probation in, receive the inspection of time.
4, the present invention has filled up low, the not ageing-resistant short slab of general polymerization object cement waterproof paint extensibility, has filled up poly-
Urethane water-repellent paint is not ageing-resistant, exposed cannot be used in the deficiency of roofing, has filled up organic silicon water-proofing coating in moist roofing
Non-binding power, the not anti-deficiency trampled.
Specific implementation mode
In order to be better understood by technical scheme of the present invention, with reference to embodiment, the invention will be further described.
Embodiment 1
The present embodiment is claimed
A kind of polymer cement waterproof paint, including liquid and mixed powder are mixed, the weight part ratio of the mixed liquid and mixed powder is：100：
80,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：100：5：0.15：0.1：0.2：0.1；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 120：100：100：2.2；
The elastic water-proof lotion is the interpolymer latex of polystyrene and acrylic ester of high-class product.
The DA types dispersant category anionic polycarboxylates type.
32.5 cement are high-class product Portland cement.
Other raw materials and additive, the high-class product for being also all well-chosen, merging into each other.
The preparation process of any of the above-described I type polymer cement waterproof paint, steps are as follows：
The preparation of mixed liquid：Start the mixing plant in agitator tank, be allowed to low-speed running, pour into water-proof elastic lotion, water is added, adds
Enter antifoaming agent, fungicide be added, dispersant is added, levelling agent is added, stirring discharges after five minutes, using auto-filling equipment into
Row automatic gauge, automatic barrelling, automatic sealing.
The preparation of mixed powder：It is mixed and stirred using horizontal ribbon powder mixing machine, the quartz sand of 40-120 mesh is poured into equipment, then
Pour into how based water reducer, starting device stirs 3 minutes, both makes to mix well, sequentially add cement, heavy calcium carbonate,
Stirring discharges after five minutes, automatic bagging, automatic gauge, artificial sealing.
In use site, by mixed liquid：Mixed powder is by weight=1:0.8, first liquid material is poured into spice bucket, starts blender,
Powder is added in spice bucket slowly again, stirs 5 minutes, had both formd I type polymer cement waterproof paint of homogeneous.
The polymer cement waterproof paint that the present embodiment is prepared passes through " Shandong Province's building engineering quality supervision verification test
" center " testing result is as follows：
| Detection project | Index performance（I types） | Testing result |
| Solid content/% | ≥70 | 75 |
| Tensile strength（Without processing）/MP | ≥1.2 | 2.3 |
| Elongation at break（Without processing）/% | ≥200 | 247 |
| Low temperature flexibility（∮ 10mm sticks） | - 10 DEG C, flawless | - 10 DEG C, flawless |
| Impermeability（0.3MP, 30min） | Without permeable | Without permeable |
The claimed polymer waterproof coating material of the present embodiment is drawn while elongation at break is significantly larger than national standard (200%)
The numerical value that intensity is also higher than national standard (1.2Mp) far away is stretched, almost twice, has broken the inverse relation of the two data, in addition,
The claimed polymer waterproof coating material national standard low temperature flexibility of the present embodiment is by (- 10 DEG C), and this product has passed through -17 DEG C.
Embodiment 2
A kind of I type polymer cement waterproof paint, including liquid and mixed powder are mixed, the weight part ratio of the mixed liquid and mixed powder is：90:
70,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：95：6：0.15：0.15：0.2：0.15；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 110：100：90：2.0；
Other technical characteristics in the present embodiment are the same as embodiment 1.
Embodiment 3
A kind of I type polymer cement waterproof paint, including liquid and mixed powder are mixed, the weight part ratio of the mixed liquid and mixed powder is：
110：90,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：105：3：0.1：0.05：0.15：0.15；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 120：110：100：1.5；
Other technical characteristics in the present embodiment are the same as embodiment 1.
Embodiment 4
A kind of I type polymer cement waterproof paint, including liquid and mixed powder are mixed, the weight part ratio of the mixed liquid and mixed powder is：
100：80,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：100：7：0.1：0.1：0.2：0.06；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 130：90：100：3.5；
Other technical characteristics in the present embodiment are the same as embodiment 1.
Embodiment 5
A kind of I type polymer cement waterproof paint, including liquid and mixed powder are mixed, the weight part ratio of the mixed liquid and mixed powder is：
110：80,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：100：5：0.15：0.05：0.25：0.15；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 115：100：100：2.5.
Other technical characteristics in the present embodiment are the same as embodiment 1.
Experiment 1
Test place：Shouguang secondary modern school art Building steel structure roofing piece position waterproof and anticorrosion, test area：1600 square metres.
（Steel structure roofing summer blanching such as griddle, strong wind and heavy rain fluctuating bulging is very big, the waterproof layer of edge joint position require it is uprising shine, be tear-resistant,
Bonding force is superpower, and at that time, many waterproof veterans and producer dare not all receive）.
Experimental period 2005-2013, quality requirement：It is applied using the I type polymer cement waterproof that embodiment 1 is claimed
Material applies empty paving technique to the piece position of steel structure roofing stress node using two cloth six, and thickness is not less than 2mm.
Experimental result：At the construction field (site), self-test has been carried out after laboratory film being taken back in the water-repellent paint mixed sampling,
Its impermeability, break-draw rate, tensile strength numerical value are consistent with regular detection numerical value.In on probation 8 years, do not had using position
Occur tearing seepy question.
The thickness of construction film is reduced to 1.6mm by 2mm after 8 years on probation, and the elongation at break of film has dropped 9.3%, stretches
Intensity improves 8.1%.Steel structure roofing is the good conductor that heat is transmitted, summer temp is very high, the four seasons temperature difference is very big, and common
It tries out and compares on concrete roof, the aging tendency of the waterproof layer on steel structure roofing is more apparent.But far beyond other
Waterproof material.
Experimental example 2
Test site：Shandong Xianxia Garment Co., Ltd. produces the waterproof and anticorrosion of company's steel structure roof boarding edge joint position（Party A workshop
Military uniform is processed all the year round, has been leaked for many years, used many waterproof materials, including general js water-repellent paints, it is all of no avail）
Test period 2010-2018,
Quality requirement：Roofing ditch and roofing stitching portion apply empty paving technique using two cloth five, and thickness reaches 1.2mm or more
Experimental result：At the construction field (site), self-test has been carried out after laboratory film being taken back in the water-repellent paint mixed sampling, no
Water penetration, break-draw rate, tensile strength numerical value are consistent with regular detection numerical value.In on probation 8 years, do not gone out using position
Now tear seepy question.
The thickness of construction film is reduced to 0.9mm by 1.2mm after 8 years on probation, and the elongation at break of film has dropped 9.5%, draws
It stretches intensity and improves 7.8%.Steel structure roofing is the good conductor that heat is transmitted, summer temp is very high, the four seasons temperature difference is very big, and general
It tries out and compares on logical concrete roof, the aging tendency of the waterproof layer on steel structure roofing is more apparent.But far beyond it
His waterproof material
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art answer
Work as understanding, involved invention scope in the application, however it is not limited to technical solution made of the specific combination of above-mentioned technical characteristic,
It should also cover in the case where not departing from the inventive concept simultaneously, arbitrary group is carried out by above-mentioned technical characteristic or its equivalent feature
The other technical solutions closed and formed.Such as features described above has the skill of similar functions with (but not limited to) disclosed herein
Art feature is replaced mutually and the technical solution that is formed.
Claims (10)
1. a kind of I type polymer cement waterproof paint, it is characterized in that：Including mixed liquid and mixed powder, the weight of the mixed liquid and mixed powder
Portion rate is：90-110：70-90,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：95-105：3-7：0.1-0.2：0.05-0.15：0.15-0.25：0.06-0.15；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 110-130：90-110：90-110：1.5-3.5.
2. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：The parts by weight of the mixed liquid and mixed powder
Counting ratio is：100：80.
3. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：The elastic water-proof lotion：Water：Disappear
Infusion：Levelling agent：DA systems dispersant：The weight part ratio of fungicide is：100：5：0.15：0.1：0.2：0.1.
4. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：32.5 cement：40-90 mesh temperature
Quartz sand：600 mesh powdered whitings：How the weight part ratio of based water reducer is 120：100：100：2.2.
5. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：The elastic water-proof lotion is benzene second
Alkene-acrylate copolymer emulsion.
6. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：The DA types dispersant category anion
Polycarboxylate.
7. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：32.5 cement is common silicic acid
Salt cement.
8. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：The water-reducing agent be how be powdered
Water-reducing agent.
9. I type polymer cement waterproof paint as described in claim 1, it is characterized in that：The antifoaming agent defoams for SPA-202
Agent.
10. a kind of I type polymer cement waterproof paint, it is characterized in that：Including mixed liquid and mixed powder, the weight of the mixed liquid and mixed powder
Portion rate is：100：80,
The mixed liquid includes the raw material of following parts by weight：Elastic water-proof lotion：Water：Antifoaming agent：Levelling agent：DA systems dispersant：It kills
The weight part ratio of microbial inoculum is：100：5：0.15：0.1：0.2：0.1；
The mixed powder includes the raw material of following parts by weight：32.5 cement：40-90 mesh fire stons sands：600 mesh powdered whitings：How
The weight part ratio of based water reducer is 120：100：100：2.2.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552773A (en) * | 2021-01-15 | 2021-03-26 | 赵朵 | Preparation method of high-flexibility polymer cement-based waterproof coating |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140911A (en) * | 2017-06-14 | 2017-09-08 | 惠州东方雨虹建筑材料有限责任公司 | Polymer cement waterproof paint that can be scratched and its preparation method and application |
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2018
- 2018-06-03 CN CN201810560154.4A patent/CN108624160A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140911A (en) * | 2017-06-14 | 2017-09-08 | 惠州东方雨虹建筑材料有限责任公司 | Polymer cement waterproof paint that can be scratched and its preparation method and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112552773A (en) * | 2021-01-15 | 2021-03-26 | 赵朵 | Preparation method of high-flexibility polymer cement-based waterproof coating |
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