CN106830818A - A kind of sound-absorbing material and preparation method - Google Patents
A kind of sound-absorbing material and preparation method Download PDFInfo
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- CN106830818A CN106830818A CN201611241801.2A CN201611241801A CN106830818A CN 106830818 A CN106830818 A CN 106830818A CN 201611241801 A CN201611241801 A CN 201611241801A CN 106830818 A CN106830818 A CN 106830818A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/52—Sound-insulating materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Building Environments (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of sound-absorbing material and preparation method thereof, it is primary raw material that the sound-absorbing material uses the granulated copper slag of wide material sources and the processing factory's waste water containing collagen, is conserved after batch mixing, foaming, injection molding, drying and obtained.Sound-absorbing material prepared by the present invention, its wet density is small, light weight, compression strength and High anti bending strength, sound-absorption coefficient are high, there is manufacture low cost simultaneously, simple advantage is processed, the material also has waterproof, fire-retardant, corrosion resistant feature compared to general fiber-like sound-absorbing material, and its durability is strong, is highly suitable for the improvement of various noises, such as industrial premises, KTV, subway, highway, railway, airport, application prospect are quite varied.
Description
Technical field
The present invention relates to technical field of composite materials, and in particular to a kind of sound-absorbing material and preparation method.
Background technology
In recent years, China's refined copper (cathode copper) yield rapid growth, 2012 is 605.76 ten thousand tons, is increased by a year-on-year basis
17.0%, 2013 annual productions are 683.88 ten thousand tons, increase by 12.9% on a year-on-year basis, and 2014 is 795.86 ten thousand tons, is increased by a year-on-year basis
16.4%.Refined copper is main based on pyrometallurgical smelting process, pyrometallurgical smelting process can substantial amounts of granulated copper slag, its volume of cargo in storage greatly,
Tract is not only taken up, also surrounding enviroment are caused with severe contamination, the huge waste of resource is result in again.
Pig's feet processing factory easily produces the waste water of COD high, BOD high, high salinity, treatment in cleaning, halogen such as boil at the link
Change waste water for enterprise increased larger cost.Pig's feet processing factory waste water contains the collagen of high level, and collagen is through water
After solution, the cement blowing agent with bioactivity can be prepared into, show excellent performance.
With industry, urban architecture industry, transportation fast development, and home amenity (sound equipment, air-conditioning, television set
Deng) popularization, noise pollution is increasingly serious, and noise pollution and water pollution, atmosphere pollution, waste pollution simultaneously claim the whole world four big dirty
Dye.Noise can not only influence hearing, and induce hypertension, artery sclerosis and coronary heart disease etc., may also lead to digestive system function
It is disorderly.Thus, the utilization of sound-absorbing material grows up therewith.Traditional sound-absorbing material for example Sound-proof material, acoustical cotton, sound-insulating felt, every
Sound felt, abatvoix, mineral wool, blanket etc., usually loose porous fibrous material, its manufacturing cost are higher, without waterproof,
Fire-retardant, corrosion-resistant function, limited with place, constructing operation is also cumbersome.
The B of Chinese invention patent CN 101471070 disclose a kind of high-performance acoustical material and preparation method thereof, the sound-absorbing
Material is made up of polypropylene spunbond cloth and the solid netted mixing short fiber layers being clipped between polypropylene spunbond cloth, without waterproof, resistance
Combustion and corrosion resistant function, cannot be degraded using substantial amounts of polyster fibre, polypropylene spunbond cloth, it is impossible to are reclaimed and are being utilized, do not meet
Environmental protection concept；Its preparation method includes raw material preparation, chopped fiber shredding, mixes combing, mixing lapping, hot briquetting, colds pressing and determine
Type, rolling and storage, long flow path, complex operation, commercial introduction acquire a certain degree of difficulty.
The content of the invention
In order to overcome the shortcomings of that prior art is present, problem to be solved by this invention be provide a kind of sound-absorbing material and
Preparation method, the sound-absorbing material is prepared into using granulated copper slag and cement as primary raw material by adding pig's feet processing factory waste water
Animal protein cement blowing agent be prepared from, with low cost, high intensity, waterproof, fire-retardant and corrosion resistant feature, can be extensive
For solving the pollution problems such as industry, urban transportation, urban architecture.
Sound-absorbing material is mostly loose porous material, and its Sound-absorptive Mechanism is the hole that sound wave gos deep into material, and hole is more
It is the open pore that inside is interpenetrated, by air molecule friction and viscosity resistance, and fiber fines is made mechanical oscillation, from
And acoustic energy is changed into heat energy.The sound-absorption coefficient of this kind of porous sound-absorbing material, typically gradually increases from low to high, therefore right
The sound absorbing effects of high frequency and intermediate frequency are preferable.Cement base porous sound absorbing concrete is study hotspot in recent years, with ordinary silicon
Acid salt cement is coacervation material, admixture haydite, other additives such as porous aggregate and fiber, foaming agent such as expanded perlite and
It is made.Wherein, foaming agent is that cement base porous sound absorbing concrete material prepares one of indispensable important component.In mix
Appropriate foaming agent is mixed in thing, microbubble that is tiny, being evenly distributed and be interconnected can be produced.According to Sound-absorptive Mechanism, system
The porosity of product is higher, and corresponding material sound absorption qualities are better.
Another main points of the invention are that, using discarded granulated copper slag, granulated copper slag has that quality is hard, corrosion resistance
By force, stable in properties the features such as, the performance of cement products can as cement additire, be improved.In the present invention, granulated copper slag is added
The pollution and waste problem itself thrown aside and triggered are not only solved, while again can be as the bone during cement solidification
Frame, it is ensured that while certain porosity, strengthens the intensity of concrete, so as to lift the combination property of acoustic material.
Present invention processing factory waste water of the utilization containing collagen, such as pig's feet processing factory waste water, and lauryl sodium sulfate,
Coconut oil oxalic acid acid amides is made composite foamable agent, takes full advantage of the useful constituent in waste water --- and collagen, it is useless
Content in water is 0.3%-1.2%, relatively costly because concentration is relatively low if for directly extracting collagen, but low concentration
The collagen content exactly very suitable compounding for being used for foaming agent, with lauryl sodium sulfate, coconut oil oxalic acid acid amides
After mixing, excellent foam performance is shown, its addition is only the 0.35%-1.3% of batch mixing gross weight.
Concrete scheme is as follows：
A kind of sound-absorbing material, is prepared from according to following steps：
(1) to calcium hydroxide is added in the plant chimney stalk containing collagen, pH value is adjusted, stirring forms sticky pasty state
Thing；
(2) to lauryl sodium sulfate and coconut oil oxalic acid acid amides is added in described pastel, foaming agent is obtained；
(3) granulated copper slag, cement are mixed with flyash, obtains batch mixing；
(4) toward addition water and foaming agent in batch mixing, stirring obtains foam cement slurry；
(5) by foam cement slurry injection mould, natural curing 72h obtains sound-absorbing material after drying.
Further, the plant chimney stalk containing collagen is pig's feet processing factory waste water, wherein collagen content
It is 0.3%-1.2%.
Further, in described step (1), regulation pH value is 10-12.
Further, in described step (2), pastel：Lauryl sodium sulfate：The quality of coconut oil oxalic acid acid amides
Than=1:1.5:1.5.
Further, in described step (3), granulated copper slag is in pyrometallurgic copper process, the slag of molten state is in water quenching
Through high pressure water impact in pond, the fayalite crystal that chilling is granulated into, particle diameter is 0.16-10mm.
Further, in described step (3), cement is portland cement, aluminate cement, ferrous aluminate cement, phosphorus
One or more in acid salt cement.
Further, in described step (3), granulated copper slag：Cement：The mass ratio of flyash=(0.05-0.3):2:
1。
Further, in described step (4), water：Foaming agent：The mass ratio of batch mixing=(0.4-0.6):(0.0035-
0.013)：1.
Further, in described step (4), the time of stirring is 5-10min, and the speed of stirring is 1000-1500r/
min。
Further, the temperature of described step (5) drying is 80-110 DEG C, and the time is 0.5-2h.
Beneficial effect：
(1) sound-absorbing material that the present invention is provided, sound-absorption coefficient is high, density is low, durability is strong, while having low cost, height
Intensity, waterproof, fire-retardant and corrosion resistant feature, are highly suitable for the improvement of various noises.
(2) it is main that sound-absorbing material of the present invention uses the granulated copper slag and the plant chimney stalk containing collagen of wide material sources
Raw material, is greatly reduced production cost, improves economic benefit.
(3) by reclaiming the secondary resources such as granulated copper slag, the plant chimney stalk containing collagen, realize turning waste into wealth, it is right
Environmental protection, resource regeneration and recycling are of great significance.
(4) granulated copper slag improves endurance quality, the decay resistance of sound-absorbing material as the mineral admixture of cement.
(5) plant chimney stalk containing collagen is prepared into animal protein cement blowing agent, and is added in cement, prepares
Into porous sound-absorbing material, the sound-absorbing effect of sound-absorbing material is improve.
(6) the preparation method technological process of the sound-absorbing material that the present invention is provided is short, and simple to operate, equipment investment is low, processing
Difficulty is small.
(7) sound-absorbing material that the present invention is provided can be used at the sound-absorbing on industrial premises, KTV, subway, highway, railway, airport
Reason, application prospect is quite varied.
Specific embodiment
Technical solution of the present invention is further elaborated with reference to embodiment.Unreceipted particular technique or bar in embodiment
Part person, is carried out according to the technology or condition described by document in the art or according to product description.Agents useful for same or instrument
The unreceipted production firm person of device, be can by city available from conventional products.
The plant chimney stalk containing collagen is by taking pig's feet processing factory waste water as an example in embodiment, but should not be used as understanding this hair
The limitation of bright scheme, the plant chimney stalk containing collagen can also be other animal hoof pin processing factory waste water, such as sheep hoof, cow hoof
Deng.
Embodiment 1
A kind of sound-absorbing material that embodiment 1 is provided, is prepared from according to following steps：
(1) to calcium hydroxide is added in pig's feet processing factory waste water, regulation pH value is 12, and stirring forms sticky pastel；
(2) to addition lauryl sodium sulfate and coconut oil oxalic acid acid amides, ratio in the pastel described in step (1)
It is pastel：Lauryl sodium sulfate：Mass ratio=1 of coconut oil oxalic acid acid amides:1.5:1.5, obtain foaming agent；
(3) granulated copper slag, cement are mixed with flyash, ratio is granulated copper slag：Cement：The mass ratio of flyash=
0.3:2:1, obtain batch mixing；
(4) toward addition water and foaming agent in batch mixing, ratio is water：Foaming agent：Mass ratio=0.6 of batch mixing:0.013：1,
Stirring 10min, rotating speed obtains foam cement slurry for 1000r/min；
(5) by foam cement slurry injection mould, after 110 DEG C of drying 0.5h, natural curing 72h obtains sound-absorbing material.
Wherein, in pig's feet processing factory waste water collagen content be 1.2%, granulated copper slag be pyrometallurgic copper process in, melt
Melt the slag of state in water quenching pool through high pressure water impact, the fayalite crystal that chilling is granulated into, average grain diameter is 10mm, cement
It is portland cement and aluminate cement according to mass ratio 1:1 compounding.
Embodiment 2
A kind of sound-absorbing material that embodiment 2 is provided, is prepared from according to following steps：
(1) to calcium hydroxide is added in pig's feet processing factory waste water, regulation pH value is 10, and stirring forms sticky pastel；
(2) to addition lauryl sodium sulfate and coconut oil oxalic acid acid amides, ratio in the pastel described in step (1)
It is pastel：Lauryl sodium sulfate：Mass ratio=1 of coconut oil oxalic acid acid amides:1.5:1.5, obtain foaming agent；
(3) granulated copper slag, cement are mixed with flyash, ratio is granulated copper slag：Cement：The mass ratio of flyash=
0.05:2:1, obtain batch mixing；
(4) toward addition water and foaming agent in batch mixing, ratio is water：Foaming agent：Mass ratio=0.4 of batch mixing:0.0035：1,
Stirring 5min, rotating speed obtains foam cement slurry for 1500r/min；
(5) by foam cement slurry injection mould, after 80 DEG C of drying 2h, natural curing 72h obtains sound-absorbing material.
Wherein, in pig's feet processing factory waste water collagen content be 0.3%, granulated copper slag be pyrometallurgic copper process in, melt
Melt the slag of state in water quenching pool through high pressure water impact, the fayalite crystal that chilling is granulated into, average grain diameter is 0.16mm, water
Mud is Portland cement.
Embodiment 3
A kind of sound-absorbing material that embodiment 3 is provided, is prepared from according to following steps：
(1) to calcium hydroxide is added in pig's feet processing factory waste water, regulation pH value is 11, and stirring forms sticky pastel；
(2) to addition lauryl sodium sulfate and coconut oil oxalic acid acid amides, ratio in the pastel described in step (1)
It is pastel：Lauryl sodium sulfate：Mass ratio=1 of coconut oil oxalic acid acid amides:1.5:1.5, obtain foaming agent；
(3) granulated copper slag, cement are mixed with flyash, ratio is granulated copper slag：Cement：The mass ratio of flyash=
0.15:2:1, obtain batch mixing；
(4) toward addition water and foaming agent in batch mixing, ratio is water：Foaming agent：Mass ratio=0.5 of batch mixing:0.01：1, stir
7min is mixed, rotating speed obtains foam cement slurry for 1200r/min；
(5) by foam cement slurry injection mould, after 105 DEG C of drying 1h, natural curing 72h obtains sound-absorbing material.
Wherein, in pig's feet processing factory waste water collagen content be 0.8%, granulated copper slag be pyrometallurgic copper process in, melt
Melt the slag of state in water quenching pool through high pressure water impact, the fayalite crystal that chilling is granulated into, average grain diameter is 5mm, cement
It is aluminate cement and phosphate cement according to mass ratio 1:1 compounding.
Embodiment 4
Performance detection is carried out to sound-absorbing material prepared in embodiment 1-3, and with side disclosed in patent CN1169739C
As a comparison, it the results are shown in Table 1 to case.Wherein, the mechanics properties testing of sound-absorbing material is performed according to standard JG T 266-2011；
The measurement of sound-absorption coefficient：The sound-absorption coefficient of material is measured using standing-wave-tube method, instrument is produced for Beijing popularity acoustic-electric Co., Ltd
SW260 standing wave tubes measure material sound-absorption coefficient.
The sound-absorbing material performance test results table of table 1
As it can be seen from table 1 the sound-absorbing material prepared by the present invention, its wet density is small, light weight, compression strength and anti-folding
Intensity is high, and sound-absorption coefficient is high, while having manufacture low cost, processing simple advantage, the material is compared to general fiber-like
Sound-absorbing material also has waterproof, fire-retardant, corrosion resistant feature, and its durability is strong, is highly suitable for the improvement of various noises, such as：
Industrial premises, KTV, subway, highway, railway, airport etc., application prospect is quite varied.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art is not departing from principle of the invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.
Claims (10)
1. a kind of sound-absorbing material, it is characterised in that：It is prepared from according to following steps：
(1) to calcium hydroxide is added in the plant chimney stalk containing collagen, pH value is adjusted, stirring forms sticky pastel；
(2) to lauryl sodium sulfate and coconut oil oxalic acid acid amides is added in described pastel, foaming agent is obtained；
(3) granulated copper slag, cement are mixed with flyash, obtains batch mixing；
(4) toward addition water and the foaming agent in batch mixing, stirring obtains foam cement slurry；
(5) by foam cement slurry injection mould, natural curing 72h obtains sound-absorbing material after drying.
2. sound-absorbing material according to claim 1, it is characterised in that：It is described to contain collagen in described step (1)
Plant chimney stalk be pig's feet processing factory waste water, wherein collagen content be 0.3%-1.2%.
3. sound-absorbing material according to claim 1, it is characterised in that：In described step (1), regulation pH value is 10-12.
4. sound-absorbing material according to claim 1, it is characterised in that：In described step (2), the pastel：It is described
Lauryl sodium sulfate：Mass ratio=1 of the coconut oil oxalic acid acid amides:1.5:1.5.
5. sound-absorbing material according to claim 1, it is characterised in that：In described step (3), the granulated copper slag is fire
During method copper metallurgy, the slag of molten state in water quenching pool through high pressure water impact, the fayalite crystal that chilling is granulated into, particle diameter
It is 0.16-10mm.
6. sound-absorbing material according to claim 1, it is characterised in that：In described step (3), the cement is silicate
One or more in cement, aluminate cement, ferrous aluminate cement, phosphate cement.
7. sound-absorbing material according to claim 1, it is characterised in that：In described step (3), the granulated copper slag：Institute
State cement：The mass ratio of the flyash=(0.05-0.3):2:1.
8. sound-absorbing material according to claim 1, it is characterised in that：In described step (4), the water：The foaming
Agent：The mass ratio of the batch mixing=(0.4-0.6):(0.0035-0.013)：1.
9. sound-absorbing material according to claim 1, it is characterised in that：In described step (4), the time of the stirring is
5-10min, the speed of stirring is 1000-1500r/min.
10. sound-absorbing material according to claim 1, it is characterised in that：In described step (5), the temperature of the drying
It it is 80-110 DEG C, the time is 0.5-2h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107916057A (en) * | 2017-11-21 | 2018-04-17 | 安徽北马科技有限公司 | A kind of preparation method of the composite foamed slurry of use for synthetic leather collagen aqueous polyurethane |
| CN108529919A (en) * | 2018-03-19 | 2018-09-14 | 长沙小新新能源科技有限公司 | A kind of concrete foamer and preparation method thereof |
| CN112062486A (en) * | 2020-09-29 | 2020-12-11 | 邢台建德水泥有限公司 | Low-temperature cement and preparation method thereof |
| CN112521179A (en) * | 2020-09-16 | 2021-03-19 | 昆明理工大学 | Method for preparing wall thermal insulation material by using industrial solid wastes |
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| CN103922635A (en) * | 2014-03-28 | 2014-07-16 | 中国科学院武汉岩土力学研究所 | Foam concrete solid powdery foaming agent and use method thereof |
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| CN102603352A (en) * | 2012-03-14 | 2012-07-25 | 武汉理工大学 | Sound absorbing material quick in onsite construction and method for preparing sound absorbing material |
| CN103274658A (en) * | 2013-01-14 | 2013-09-04 | 虞克夫 | Industrial waste residue and solid danger refuse resource utilization method |
| CN103880375A (en) * | 2014-01-22 | 2014-06-25 | 中铁四局集团有限公司 | Preparation method of light-weight inorganic fireproof thermal-insulation board |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916057A (en) * | 2017-11-21 | 2018-04-17 | 安徽北马科技有限公司 | A kind of preparation method of the composite foamed slurry of use for synthetic leather collagen aqueous polyurethane |
| CN108529919A (en) * | 2018-03-19 | 2018-09-14 | 长沙小新新能源科技有限公司 | A kind of concrete foamer and preparation method thereof |
| CN112521179A (en) * | 2020-09-16 | 2021-03-19 | 昆明理工大学 | Method for preparing wall thermal insulation material by using industrial solid wastes |
| CN112521179B (en) * | 2020-09-16 | 2023-09-01 | 昆明理工大学 | Method for preparing wall thermal insulation material by utilizing industrial solid waste |
| CN112062486A (en) * | 2020-09-29 | 2020-12-11 | 邢台建德水泥有限公司 | Low-temperature cement and preparation method thereof |
| CN112062486B (en) * | 2020-09-29 | 2022-03-15 | 邢台建德水泥有限公司 | Low-temperature cement and preparation method thereof |
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Application publication date: 20170613 |