CN108585938A - A kind of preparation method of steam-pressing aero-concrete - Google Patents
A kind of preparation method of steam-pressing aero-concrete Download PDFInfo
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- CN108585938A CN108585938A CN201711488946.7A CN201711488946A CN108585938A CN 108585938 A CN108585938 A CN 108585938A CN 201711488946 A CN201711488946 A CN 201711488946A CN 108585938 A CN108585938 A CN 108585938A
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Classifications
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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
-
- 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of preparation methods of steam-pressing aero-concrete, belong to construction material preparing technical field.The present invention first will（N amidino groups）Dodecylacrylamide and polyethyleneglycol derivative are added to the water, and after being stirred to react, add calcium bicarbonate and carbomer, heating stirring is reacted, and is sequentially added cement, white lime, gypsum, sand and foam stabilizer, is continued to be stirred, mixed mortar, by mixed mortar inject mold in, precuring is quiet stop after, demoulding, coagulation sun-dried mud brick is obtained, then coagulation sun-dried mud brick is transferred to still kettle, after heat-insulation pressure keeping maintenance, again through natural curing to get steam-pressing aero-concrete.Steam-pressing aero-concrete prepared by technical solution of the present invention has the characteristics that mechanical property, while the pore structure of product is abundant, reduces unit weight, lightening effect greatly improves.
Description
Technical field
The invention discloses a kind of preparation methods of steam-pressing aero-concrete, belong to construction material preparing technical field.
Background technology
Autoclave aerated concrete building block is with flyash, lime, cement, gypsum, and slag etc. is primary raw material, is added appropriate
Foaming agent, conditioning agent, bubble stabilizer are stirred through dispensing, cast, quiet to stop, cutting and the technical process such as high-pressure steaming and cultivating and be made
A kind of celluar concrete product.The bulk density of autoclave aerated concrete building block is the one third of clay brick, heat preservation
Performance is 3~4 times of clay brick, and sound insulation value is 2 times of clay brick, and anti-permeability performance is one times of clay brick or more, fire resistance
Can be 6~8 times of armored concrete.The masonry strength of building block is about the 80% of building block self-strength（Common brick is 30%）.Steam pressure adds
The construction property of gas concrete segment is also very excellent, it can not only produce various specifications in factory, can also be as wood
Material is equally sawed, is dug, is bored, is followed closely, and since its volume is bigger, and speed of application is also more quick, can be used as general
The packing material of building.However, air-entrained concrete building block cubic deformation coefficient is bigger than normal, low strength, water absorption rate are big, and build by laying bricks or stones into
When wall, easily there is crack in wall, and coat of plaster is also easy to produce large area cracking, hollowing and obscission, shows apparent brittleness,
The further application and popularization of autoclave aerated concrete building block are hindered to a certain extent.In addition to this, with steam pressurized
Concrete voids increase, product more lightweight, more convenient to use quick in transport and architectural process, but with its sky
The increase of gap will certainly lead to the decline of its mechanical strength, this generates mechanical property and it is Lightness cannot be firm, meet not
Quality requirement of the market to steam-pressing aero-concrete, product evaluation are had a greatly reduced quality, and pushing away for steam-pressing aero-concrete is seriously affected
Extensively with application.
Therefore, how to improve traditional steam-pressing aero-concrete mechanical property with it is Lightness cannot take into account the shortcomings that, to obtain
The steam-pressing aero-concrete for taking more high combination property is that it is promoted and applies, meets industrial production demand urgent problem to be solved.
Invention content
The present invention solves the technical problem of：For traditional steam-pressing aero-concrete mechanical property with it is Lightness cannot
Take into account the shortcomings that, provide a kind of preparation method of steam-pressing aero-concrete.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）It counts in parts by weight, takes 8~10 parts successively（N- amidino groups）Dodecylacrylamide, 6~8 parts of polyethylene glycol derive
Object, 3~20 parts of calcium bicarbonates, 10~20 parts of carbomers, 70~80 parts of cement, 80~100 parts of white limes, 18~20 parts of gypsum,
300~400 parts of sand, 0.8~1.2 portion of foam stabilizer, 180~200 parts of water first will（N- amidino groups）Dodecylacrylamide and poly- second
Diol, derivatives are added to the water, and after being stirred to react 60~90min, add calcium bicarbonate and carbomer, heating stirring reaction 45
After~60min, cement, white lime, gypsum, sand and foam stabilizer are sequentially added, continues to be stirred 2~4h, obtains mixed mortar；
（2）By mixed mortar inject mold in, precuring is quiet stop 2~4h after, demoulding, obtain coagulation sun-dried mud brick；
（3）Coagulation sun-dried mud brick is placed in carbonization case, still kettle is transferred to after the 2~4h that is carbonized, heat-insulation pressure keeping conserves 12~16h, then passes through
Natural curing 3~28 days is to get steam-pressing aero-concrete.
Step（1）The polyethyleneglycol derivative is polyethylene glycol-proline derivative or polyethylene glycol-phospholipids derivative
In any one.
Step（1）The carbomer is carbomer 910, any one in carbomer 934 or Acritamer 940.
Step（1）The cement is portland cement, aluminate cement, sulphate aluminium cement, fluoroaluminate cement or iron
Any one in aluminate cement.
Step（1）The sand is any one in river sand or sea sand；The sand apparent density is 2550~2600kg/
m3, loose bulk density is 1400~1450kg/m3。
Step（1）The foam stabilizer is dodecyldimethylamine oxide, polyacrylamide, polyvinyl alcohol, starch or carboxylic
Any one in methylcellulose.
The beneficial effects of the invention are as follows：
（1）Technical solution of the present invention is by adding carbomer and calcium bicarbonate, in preparing Concrete, carbomer molecule knot
The calcium carbonate crystal that the adsorbable calcium bicarbonate of abundant carboxyl generates after decomposing in structure, and once have nucleus generation that can be inhaled
It is attached, avoid further growing up and reuniting for calcium carbonate crystal, in one layer of size of carbomer adsorption in nano level carbon
Sour calcium crystal, in subsequent preparation process, the carboxyl in carbomer molecular structure be neutralized in concrete alkaline system and from
Sonization, the identical negative electrical charge of carboxylase gene band after ionization and it is mutually exclusive, to make the nano-calcium carbonate particles of absorption in coagulation
Fine dispersion in soil body system, to effectively improve the mechanical property of concrete；
（2）Technical solution of the present invention passes through addition（N- amidino groups）Dodecylacrylamide and polyethyleneglycol derivative, utilize two
The block copolymer that generates is used as air entraining agent after person's reaction, in molecular structure, polyethylene glycol segment with good hydrophily,
And（N- amidino groups）Dodecylacrylamide segment has good hydrophobicity, and such block copolymer is in concrete system
Balloon-shaped structure can be spontaneously formed, makes air with micro-bubble formal distribution in concrete structure, and in preparation process, with
Calcium bicarbonate decomposes the carbon dioxide gas generated and can interact with the amidine group in block copolymer first, makes block
Charge on amidine group band on copolymer side chain, because like charges are mutually exclusive to make balloon-shaped structure volume increase, further
The pore structure of abundant product, playing reduces product unit weight, realizes lightening effect.
Specific implementation mode
It counts in parts by weight, takes 8~10 parts successively（N- amidino groups）Dodecylacrylamide, 6~8 parts of polyethylene glycol derive
Object, 3~20 parts of calcium bicarbonates, 10~20 parts of carbomers, 70~80 parts of cement, 80~100 parts of white limes, 18~20 parts of gypsum,
300~400 parts of sand, 0.8~1.2 portion of foam stabilizer, 180~200 parts of water first will（N- amidino groups）Dodecylacrylamide, poly- second
Batch mixer is added in diol, derivatives and water, under the conditions of rotating speed is 400~500r/min, after being stirred to react 60~90min, then to
Calcium bicarbonate and carbomer are added in batch mixer, is 80~90 DEG C in temperature, under the conditions of rotating speed is 600~800r/min, heats
After being stirred to react 45~60min, then cement, white lime, gypsum, sand and foam stabilizer are sequentially added into batch mixer, continue at temperature
Degree is 45~50 DEG C, and under the conditions of rotating speed is 200~250r/min, constant temperature is stirred 2~4h, obtains mixed mortar；And by gained
Mixed mortar injects in mold, then mold is transferred to precuring room, under the conditions of temperature is 35~40 DEG C, precuring is quiet stop 2~4h after,
Demoulding, obtains coagulation sun-dried mud brick；Coagulation sun-dried mud brick is placed in carbonization case again, is 20% in gas concentration lwevel, temperature is 35~40 DEG C,
Under the conditions of relative humidity is 50~60%, constant temperature and humidity is carbonized 2~4h, obtains carbonated concrete base, then by gained carbonated concrete base
Move into still kettle, in pressure be 13~15atm, temperature be 185~190 DEG C under the conditions of, heat-insulation pressure keeping conserve 12~16h after, in
Under room temperature, natural curing 3~28 days is to get steam-pressing aero-concrete.The polyethyleneglycol derivative is polyethylene glycol-dried meat
Any one in threonine derivative or polyethylene glycol-phospholipids derivative.The carbomer be carbomer 910, carbomer 934 or
Any one in Acritamer 940.The cement is portland cement, aluminate cement, sulphate aluminium cement, fluoaluminic acid brine
Any one in mud or ferrous aluminate cement.The sand is any one in river sand or sea sand；The sand apparent density is
2550~2600kg/m3, loose bulk density is 1400~1450kg/m3.The foam stabilizer aoxidizes for dodecyl dimethyl
Any one in amine, polyacrylamide, polyvinyl alcohol, starch or carboxymethyl cellulose.
Example 1
It counts in parts by weight, takes 10 parts successively（N- amidino groups）Dodecylacrylamide, 8 parts of polyethyleneglycol derivatives, 20 parts of carbon
Sour hydrogen calcium, 20 parts of carbomers, 80 parts of cement, 100 parts of white limes, 20 parts of gypsum, 400 parts of sand, 1.2 portions of foam stabilizers, 200 parts of water,
First will（N- amidino groups）Batch mixer is added in dodecylacrylamide, polyethyleneglycol derivative and water, in rotating speed be 500r/min items
Under part, after being stirred to react 90min, then calcium bicarbonate and carbomer are added into batch mixer, are 90 DEG C in temperature, rotating speed is
Under the conditions of 800r/min, after heating stirring reacts 60min, then sequentially add into batch mixer cement, white lime, gypsum, sand and
Foam stabilizer, it is 50 DEG C to continue at temperature, and under the conditions of rotating speed is 250r/min, constant temperature is stirred 4h, obtains mixed mortar；And by institute
In mixed mortar injection mold, then mold is transferred to precuring room, under the conditions of temperature is 40 DEG C, precuring is quiet stop 4h after, demoulding,
Obtain coagulation sun-dried mud brick；Coagulation sun-dried mud brick is placed in carbonization case again, is 20% in gas concentration lwevel, temperature is 40 DEG C, and relative humidity is
Under the conditions of 60%, constant temperature and humidity carbonization 4h obtains carbonated concrete base, then gained carbonated concrete base is moved into still kettle, in pressure
For 15atm, under the conditions of temperature is 190 DEG C, after heat-insulation pressure keeping conserves 16h, under room temperature, natural curing 28 days is to get steaming
Pressing aero-concrete.The polyethyleneglycol derivative is polyethylene glycol-proline derivative.The carbomer is carbomer 910.
The cement is portland cement.The sand is river sand；The sand apparent density is 2600kg/m3, loose bulk density is
1450kg/m3.The foam stabilizer is dodecyldimethylamine oxide.
Example 2
It counts in parts by weight, takes 8 parts of polyethyleneglycol derivatives successively, 20 parts of calcium bicarbonates, 20 parts of carbomers, 80 parts of cement, 100
First batch mixing is added in polyethyleneglycol derivative and water by part white lime, 20 parts of gypsum, 400 parts of sand, 1.2 portions of foam stabilizers, 200 parts of water
Machine after being stirred to react 90min, then calcium bicarbonate and carbomer is added into batch mixer under the conditions of rotating speed is 500r/min, in
Temperature is 90 DEG C, under the conditions of rotating speed is 800r/min, after heating stirring reacts 60min, then sequentially add into batch mixer cement,
White lime, gypsum, sand and foam stabilizer, it is 50 DEG C to continue at temperature, and under the conditions of rotating speed is 250r/min, constant temperature is stirred 4h,
Obtain mixed mortar；And inject gained mixed mortar in mold, then mold is transferred to precuring room, under the conditions of temperature is 40 DEG C,
Precuring is quiet stop 4h after, demoulding, obtain coagulation sun-dried mud brick；Again by coagulation sun-dried mud brick be placed in carbonization case in, in gas concentration lwevel be 20%, temperature
Degree is 40 DEG C, and under the conditions of relative humidity is 60%, constant temperature and humidity is carbonized 4h, obtains carbonated concrete base, then by gained carbonated concrete
Base moves into still kettle, in pressure be 15atm, under the conditions of temperature is 190 DEG C, after heat-insulation pressure keeping conserves 16h, under room temperature,
Natural curing 28 days is to get steam-pressing aero-concrete.The polyethyleneglycol derivative is polyethylene glycol-proline derivative.Institute
It is carbomer 910 to state carbomer.The cement is portland cement.The sand is river sand；The sand apparent density is 2600kg/
m3, loose bulk density 1450kg/m3.The foam stabilizer is dodecyldimethylamine oxide.
Example 3
It counts in parts by weight, takes 10 parts successively（N- amidino groups）Dodecylacrylamide, 20 parts of calcium bicarbonates, 20 parts of carbomers,
80 parts of cement, 100 parts of white limes, 20 parts of gypsum, 400 parts of sand, 1.2 portions of foam stabilizers, 200 parts of water first will（N- amidino groups）Dodecane
Batch mixer is added in base acrylamide and water, under the conditions of rotating speed is 500r/min, after being stirred to react 90min, then into batch mixer
Calcium bicarbonate and carbomer is added, in temperature be 90 DEG C, under the conditions of rotating speed is 800r/min, after heating stirring reacts 60min, then
Cement, white lime, gypsum, sand and foam stabilizer are sequentially added into batch mixer, it is 50 DEG C to continue at temperature, rotating speed 250r/min
Under the conditions of, constant temperature is stirred 4h, obtains mixed mortar；And inject gained mixed mortar in mold, then mold is transferred to precuring
Room, in temperature be 40 DEG C under the conditions of, precuring is quiet stop 4h after, demoulding, obtain coagulation sun-dried mud brick；Coagulation sun-dried mud brick is placed in carbonization case again,
It is 20% in gas concentration lwevel, temperature is 40 DEG C, and under the conditions of relative humidity is 60%, constant temperature and humidity carbonization 4h obtains carbonization coagulation
Sun-dried mud brick, then by gained carbonated concrete base move into still kettle, in pressure be 15atm, temperature be 190 DEG C under the conditions of, heat-insulation pressure keeping
After conserving 16h, under room temperature, natural curing 28 days is to get steam-pressing aero-concrete.The carbomer is carbomer 910.
The cement is portland cement.The sand is river sand；The sand apparent density is 2600kg/m3, loose bulk density is
1450kg/m3.The foam stabilizer is dodecyldimethylamine oxide.
Example 4
It counts in parts by weight, takes 10 parts successively（N- amidino groups）Dodecylacrylamide, 8 parts of polyethyleneglycol derivatives, 20 parts are received
Rice calcium carbonate, 20 parts of carbomers, 80 parts of cement, 100 parts of white limes, 20 parts of gypsum, 400 parts of sand, 1.2 portions of foam stabilizers, 200 parts
Water first will（N- amidino groups）Batch mixer is added in dodecylacrylamide, polyethyleneglycol derivative and water, in rotating speed be 500r/min
Under the conditions of, after being stirred to react 90min, then nano-calcium carbonate and carbomer are added into batch mixer, are 90 DEG C in temperature, rotating speed is
Under the conditions of 800r/min, after heating stirring reacts 60min, then sequentially add into batch mixer cement, white lime, gypsum, sand and
Foam stabilizer, it is 50 DEG C to continue at temperature, and under the conditions of rotating speed is 250r/min, constant temperature is stirred 4h, obtains mixed mortar；And by institute
In mixed mortar injection mold, then mold is transferred to precuring room, under the conditions of temperature is 40 DEG C, precuring is quiet stop 4h after, demoulding,
Obtain coagulation sun-dried mud brick；Coagulation sun-dried mud brick is placed in carbonization case again, is 20% in gas concentration lwevel, temperature is 40 DEG C, and relative humidity is
Under the conditions of 60%, constant temperature and humidity carbonization 4h obtains carbonated concrete base, then gained carbonated concrete base is moved into still kettle, in pressure
For 15atm, under the conditions of temperature is 190 DEG C, after heat-insulation pressure keeping conserves 16h, under room temperature, natural curing 28 days is to get steaming
Pressing aero-concrete.The polyethyleneglycol derivative is polyethylene glycol-proline derivative.The carbomer is carbomer 910.
The cement is portland cement.The sand is river sand；The sand apparent density is 2600kg/m3, loose bulk density is
1450kg/m3.The foam stabilizer is dodecyldimethylamine oxide.
Example 5
It counts in parts by weight, takes 10 parts successively（N- amidino groups）Dodecylacrylamide, 8 parts of polyethyleneglycol derivatives, 20 parts of carbon
Sour hydrogen calcium, 80 parts of cement, 100 parts of white limes, 20 parts of gypsum, 400 parts of sand, 1.2 portions of foam stabilizers, 200 parts of water first will（N- amidino groups）
Batch mixer is added in dodecylacrylamide, polyethyleneglycol derivative and water, under the conditions of rotating speed is 500r/min, is stirred to react
After 90min, then calcium bicarbonate is added into batch mixer, is 90 DEG C in temperature, under the conditions of rotating speed is 800r/min, heating stirring is anti-
After answering 60min, then cement, white lime, gypsum, sand and foam stabilizer are sequentially added into batch mixer, it is 50 DEG C to continue at temperature, is turned
Under the conditions of speed is 250r/min, constant temperature is stirred 4h, obtains mixed mortar；And inject gained mixed mortar in mold, then will
Mold is transferred to precuring room, in temperature be 40 DEG C under the conditions of, precuring is quiet stop 4h after, demoulding, obtain coagulation sun-dried mud brick；Coagulation sun-dried mud brick is set again
It is 20% in gas concentration lwevel in being carbonized in case, temperature is 40 DEG C, under the conditions of relative humidity is 60%, constant temperature and humidity carbonization 4h,
Carbonated concrete base is obtained, then gained carbonated concrete base is moved into still kettle, is 15atm in pressure, temperature is 190 DEG C of conditions
Under, after heat-insulation pressure keeping conserves 16h, under room temperature, natural curing 28 days is to get steam-pressing aero-concrete.The poly- second two
01 derivatives are polyethylene glycol-proline derivative.The cement is portland cement.The sand is river sand；The sand is apparent
Density is 2600kg/m3, loose bulk density 1450kg/m3.The foam stabilizer is dodecyldimethylamine oxide.
Comparative example：The autoclave aerated concrete building block of Beijing building materials Co., Ltd production.
The steam-pressing aero-concrete of 1 to 5 gained of example and comparative example product are subjected to performance detection, specific detection method
It is as follows：
Mechanical property：Experiment uses REGER board universal testing machines, and compression test is carried out to building block according to GB/T11969；
Specific testing result is as shown in table 1：
Table 1
| Detection project | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Compression strength/MPa | 10.9 | 9.5 | 7.4 | 8.7 | 6.1 | 3.2 |
By 1 testing result of table it is found that steam-pressing aero-concrete prepared by technical solution of the present invention has the characteristics that mechanical property, together
When product pore structure it is abundant, reduce unit weight, lightening effect greatly improves, and has in the development of building material industry
Wide foreground.
Claims (6)
1. a kind of preparation method of steam-pressing aero-concrete, it is characterised in that specifically preparation process is：
（1）It counts in parts by weight, takes 8~10 parts successively（N- amidino groups）Dodecylacrylamide, 6~8 parts of polyethylene glycol derive
Object, 3~20 parts of calcium bicarbonates, 10~20 parts of carbomers, 70~80 parts of cement, 80~100 parts of white limes, 18~20 parts of gypsum,
300~400 parts of sand, 0.8~1.2 portion of foam stabilizer, 180~200 parts of water first will（N- amidino groups）Dodecylacrylamide and poly- second
Diol, derivatives are added to the water, and after being stirred to react 60~90min, add calcium bicarbonate and carbomer, heating stirring reaction 45
After~60min, cement, white lime, gypsum, sand and foam stabilizer are sequentially added, continues to be stirred 2~4h, obtains mixed mortar；
（2）By mixed mortar inject mold in, precuring is quiet stop 2~4h after, demoulding, obtain coagulation sun-dried mud brick；
（3）Coagulation sun-dried mud brick is placed in carbonization case, still kettle is transferred to after the 2~4h that is carbonized, heat-insulation pressure keeping conserves 12~16h, then passes through
Natural curing 3~28 days is to get steam-pressing aero-concrete.
2. a kind of preparation method of steam-pressing aero-concrete according to claim 1, it is characterised in that：Step（1）It is described
Polyethyleneglycol derivative is any one in polyethylene glycol-proline derivative or polyethylene glycol-phospholipids derivative.
3. a kind of preparation method of steam-pressing aero-concrete according to claim 1, it is characterised in that：Step（1）It is described
Carbomer is carbomer 910, any one in carbomer 934 or Acritamer 940.
4. a kind of preparation method of steam-pressing aero-concrete according to claim 1, it is characterised in that：Step（1）It is described
Cement is portland cement, aluminate cement, sulphate aluminium cement, any one in fluoroaluminate cement or ferrous aluminate cement
Kind.
5. a kind of preparation method of steam-pressing aero-concrete according to claim 1, it is characterised in that：Step（1）It is described
Sand is any one in river sand or sea sand；The sand apparent density is 2550~2600kg/m3, loose bulk density 1400
~1450kg/m3。
6. a kind of preparation method of steam-pressing aero-concrete according to claim 1, it is characterised in that：Step（1）It is described
Foam stabilizer is dodecyldimethylamine oxide, polyacrylamide, polyvinyl alcohol, any one in starch or carboxymethyl cellulose
Kind.
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Application publication date: 20180928 |