CN109020450A - A kind of preparation method of water proof building plasterboard - Google Patents
A kind of preparation method of water proof building plasterboard Download PDFInfo
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- CN109020450A CN109020450A CN201811134565.3A CN201811134565A CN109020450A CN 109020450 A CN109020450 A CN 109020450A CN 201811134565 A CN201811134565 A CN 201811134565A CN 109020450 A CN109020450 A CN 109020450A
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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Abstract
The invention discloses a kind of preparation methods of water proof building plasterboard, belong to building material technical field.The present invention first by ardealite and dehydrated alcohol mixing and ball milling, obtains ball milling slurry, then by after 2~4h of ball milling slurry and concentrated sulfuric acid hybrid reaction, adds calcium salt soln, and adjusts pH to alkalinity, and after hydro-thermal is stirred to react 6~8h, concentration obtains concentrate feed；Concentrate feed, water, quick lime, sodium metasilicate, sodium metaaluminate and polyallylamine are poured into water heating kettle again, and are passed through carbon dioxide gas into water heating kettle, until pressure is up to 0.3~0.4MPa in water heating kettle, again it is heated be stirred to react after, be cooled to room temperature, open reaction kettle, discharging, obtains calcium plaster；Then calcium plaster is injected in mold, it is cooling after low temperature drying, it demoulds to get water proof building plasterboard.Gained water proof building plasterboard of the invention has excellent waterproof performance and surface hardness.
Description
Technical field
The invention discloses a kind of preparation methods of water proof building plasterboard, belong to building material technical field.
Background technique
Building gypsum is a kind of inexpensive and has the strong ornament materials of figurations ability such as lightweight, ventilative, sound insulation, heat-insulated.
At present in building trade, especially in new decorative material for building, plastering occupies special status, and plays more next
Bigger effect.But due to gypsum in use, watering quantity is generally far larger than theoretical water requirement.It is more in the drying process
Remaining water is evaporated mostly, and plastering is made to form a porous system, so that making the intensity of plastering generally reduces, waterproof
Humidity resistance is poor, and the application of building gypsum is caused to be very limited.Therefore in the item for not influencing plastering use intensity
Under part, waterproof performance, the surface hardness of product are improved, it has also become expand the only way of plastering use scope.
In research for many years, researcher is concerned only with flexural strength, the surface hardness that plastering does not absorb water mostly, right
Intensity, hardness research after water suction is seldom.And in the development of current plastering, after water suction intensity, hardness increasingly by
Concern.During the preparation process, due to the excessive incorporation of moisture, in the drying process, excessive moisture steams plasterboard traditional at present
Hair make gypsum board surface formed porous system, cause gypsum board surface hardness decline, waterproof performance decline, therefore also need to its into
Row further research.
Summary of the invention
The present invention solves the technical problem of: during the preparation process for conventional gypsum plate, since moisture is excessive
Incorporation, in the drying process, excessive moisture evaporation make gypsum board surface form porous system, cause under gypsum board surface hardness
The drawbacks of drop, waterproof performance declines, provide a kind of preparation method of water proof building plasterboard.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
(1) according to parts by weight, 30~50 parts of ardealites are successively taken, 60~80 parts of dehydrated alcohols, 4~8 parts of concentrated sulfuric acids, 30~40
Part calcium salt soln obtains ball milling slurry first by ardealite and dehydrated alcohol mixing and ball milling, then ball milling slurry and the concentrated sulfuric acid are mixed instead
After answering 2~4h, calcium salt soln is added, and adjusts pH to alkalinity, after hydro-thermal is stirred to react 6~8h, concentration obtains concentrate feed；
(2) according to parts by weight, 80~120 parts of concentrate feeds are successively taken, 40~60 parts of water, 8~10 parts of quick limes, 8~10 parts partially
Sodium metasilicate, 3~5 parts of sodium metaaluminates, 10~15 parts of polyallylamines, first by concentrate feed, water, quick lime, sodium metasilicate, sodium metaaluminate
Poured into water heating kettle with polyallylamine, and be passed through carbon dioxide gas into water heating kettle, until in water heating kettle pressure up to 0.3~
0.4MPa, then it is heated be stirred to react after, be cooled to room temperature, open water heating kettle, discharging, obtain calcium plaster；
(3) calcium plaster is injected in mold, it is cooling after low temperature drying, it demoulds to get water proof building plasterboard.
Step (1) described concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 96~98%.
Step (1) described calcium salt soln is the calcium salt soln that mass fraction is 10~20%；The calcium salt is calcium nitrate, chlorine
Change any one in calcium.
Step (1) the adjusting pH adjusts pH to 8.5~9.5 to alkalinity.
Step (2) sodium metasilicate is anhydrous sodium metasilicate, in five hydrated sodium metasilicates or nine hydrated sodium metasilicates
It is a kind of.
Step (3) described low temperature drying are as follows: under the conditions of temperature is 45~55 DEG C, drying to constant weight.
The beneficial effects of the present invention are:
(1) technical solution of the present invention is first using ardealite as gypsum source, when ardealite is that wet process manufactures phosphoric acid in phosphorous chemical industry
The waste residue of discharge, main chemical compositions and the natural gypsum are essentially identical, mainly exist with dihydrate gypsum or semi-hydrated gypsum, simultaneously
Also containing elements such as phosphorus, fluorine, wherein phosphorus exists mostly in the form of phosphorus pentoxide, can be under sulphuric acid catalysis effect, with anhydrous second
Alcohol reaction, generates phosphatide, and in subsequent preparation process, phosphatide is slowly hydrolyzed under alkaline condition, and in calcium salt soln
Calcium binding, forms calcium hydroxy phosphate, and the formation of calcium hydroxy phosphate can be achieved to carry out the hole that ardealite itself dissolves out weight
New filling effectively avoids bringing into for its hole and influences the surface hardness and product waterproof property of gypsum board products；
(2) for technical solution of the present invention by introducing polyallylamine, which can be with carbon dioxide reaction under relatively lower temp
And three-dimensional crosslinked network structure is formed, the reaction is reversible, can remove again again in 100 DEG C or more carbon dioxide, to play
Foaming effect forms pore channel；It is aided with addition quick lime again, quick lime can react to form calcium hydroxide colloidal solid with water,
And the grain diameter performance, large specific surface area, there is good absorption property, the adsorbable hole for being filled in carbon dioxide formation
Channel interior, and form calcium carbonate crystal in carbon dioxide reaction, and in subsequent cooling procedure, carbon dioxide again can again with
Polyallylamine combines, and rebuilds three-dimensional net structure, and the calcium carbonate crystal of formation is effectively fixed, realize interiors of products and
The densification on surface improves the surface hardness and surface waterproofing performance of product；
(3) for technical solution of the present invention by being aided with sodium metasilicate, which can be anti-with water-soluble fluorine ion in ardealite system
It answers, generates slightly solubility salt and fix fluorine element, and realize the filling to residual porosity in gypsum board products, meanwhile, system
Middle free calcium ions, meta-aluminic acid radical ion can be reacted with calcium sulfate in gypsum, generate the lower hydrated product of solubility, thus
New hydrated gel network is formed, the three-dimensional net structure that the hydrated gel and polyallylamine generate is mutually interspersed, improves internal
It is crosslinked consistency, promotes the surface hardness of product and waterproof performance further.
Specific embodiment
According to parts by weight, 30~50 parts of ardealites are successively taken, 60~80 parts of dehydrated alcohols, 4~8 parts of concentrated sulfuric acids, 30~
40 parts of calcium salt solns, first pour into ardealite and dehydrated alcohol in ball grinder, and are 20:1~40:1 addition by ball material mass ratio
Zirconium oxide ball milling pearl, under the conditions of revolving speed is 300~500r/min, after 4~6h of ball milling mixing, discharging obtains ball milling slurry, then will
Gained ball milling slurry and concentrated sulfuric acid mixing are poured into reaction kettle, are 75~85 DEG C in temperature, revolving speed is 600~800r/min condition
Under, after heating stirring reacts 2~4h, reaction kettle is opened, and material in reaction kettle is transferred in No. 1 water heating kettle, then to No. 1 hydro-thermal
Calcium salt soln is added in kettle, and adjusts material pH to 8.5~9.5 in No. 1 water heating kettle, after being adjusted to pH, by No. 1 water heating kettle
It is closed, it is 175~185 DEG C in temperature, under the conditions of revolving speed is 400~500r/min, after hydro-thermal is stirred to react 6~8h, opens No. 1
Water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators is 85~90 DEG C in temperature, pressure is 450~
Under the conditions of 500mmHg, 45~60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 80~120 parts of concentrate feeds are successively taken,
40~60 parts of water, 8~10 parts of quick limes, 8~10 parts of sodium metasilicates, 3~5 parts of sodium metaaluminates, 10~15 parts of polyallylamines first will
Concentrate feed, water, quick lime, sodium metasilicate, sodium metaaluminate and polyallylamine pour into No. 2 water heating kettles, and into No. 2 water heating kettles with
300~400mL/min rate is continually fed into carbon dioxide gas, until pressure reaches 0.3~0.4MPa in No. 2 water heating kettles, then
No. 2 water heating kettles are closed, in temperature be 120~140 DEG C, revolving speed be 600~800r/min under the conditions of, after 6~8h of hydro-thermal reaction,
Stop heating, be cooled to room temperature under stirring, later on No. 2 water heating kettles, discharges, obtain calcium plaster；By gained calcium plaster
Inject in mold, control calcium plaster reaches the 70~72% of mold height, then mold is moved into baking oven, in temperature be 45~55
Under the conditions of DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, and demoulds to get water proof building plasterboard.The dense sulphur
Acid is the concentrated sulfuric acid that mass fraction is 96~98%.The calcium salt soln is the calcium salt soln that mass fraction is 10~20%；It is described
Calcium salt is calcium nitrate, any one in calcium chloride.The sodium metasilicate is anhydrous sodium metasilicate, five hydrated sodium metasilicates or nine
One of hydrated sodium metasilicate.
According to parts by weight, 50 parts of ardealites, 80 parts of dehydrated alcohols, 8 parts of concentrated sulfuric acids, 40 parts of calcium salt solns, elder generation are successively taken
Ardealite and dehydrated alcohol are poured into ball grinder, and are that zirconium oxide ball milling pearl is added in 40:1 by ball material mass ratio, is in revolving speed
Under the conditions of 500r/min, after ball milling mixing 6h, discharging obtains ball milling slurry, then gained ball milling slurry and the concentrated sulfuric acid is mixed and poured into
In reaction kettle, it is 85 DEG C in temperature, under the conditions of revolving speed is 800r/min, after heating stirring reacts 4h, opens reaction kettle, and will be anti-
It answers material in kettle to be transferred in No. 1 water heating kettle, then calcium salt soln is added into No. 1 water heating kettle, and adjust material pH in No. 1 water heating kettle
It is after being adjusted to pH, No. 1 water heating kettle is closed to 9.5, in temperature be 185 DEG C, under the conditions of revolving speed is 500r/min, hydro-thermal
After being stirred to react 8h, open No. 1 water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators, in temperature be 90 DEG C,
Under the conditions of pressure is 500mmHg, 60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 120 parts of concentrate feeds are successively taken, 60
Part water, 10 parts of quick limes, 10 parts of sodium metasilicates, 5 parts of sodium metaaluminates, 15 parts of polyallylamines, first by concentrate feed, water, quick lime, partially
Sodium metasilicate, sodium metaaluminate and polyallylamine pour into No. 2 water heating kettles, and are persistently led into No. 2 water heating kettles with 400mL/min rate
Enter carbon dioxide gas, until pressure reaches 0.4MPa in No. 2 water heating kettles, then No. 2 water heating kettles are closed, in temperature be 140 DEG C,
Under the conditions of revolving speed is 800r/min, after hydro-thermal reaction 8h, stops heating, be cooled to room temperature under stirring, later on No. 2
Water heating kettle, discharging, obtains calcium plaster；Gained calcium plaster is injected in mold, control calcium plaster reaches the 72% of mold height, then will
Mold moves into baking oven, and under the conditions of temperature is 55 DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, and demoulds, i.e.,
Obtain water proof building plasterboard.The concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.The calcium salt soln is that mass fraction is
20% calcium salt soln；The calcium salt is calcium nitrate.The sodium metasilicate is anhydrous sodium metasilicate.
According to parts by weight, 50 parts of building gypsums are successively taken, 80 parts of dehydrated alcohols, 8 parts of concentrated sulfuric acids, 40 parts of calcium salt solns,
First building gypsum and dehydrated alcohol are poured into ball grinder, and by ball material mass ratio be 40:1 be added zirconium oxide ball milling pearl, in turn
Under the conditions of speed is 500r/min, after ball milling mixing 6h, discharging obtains ball milling slurry, then gained ball milling slurry and the concentrated sulfuric acid is mixed
It pours into reaction kettle, is 85 DEG C in temperature, under the conditions of revolving speed is 800r/min, after heating stirring reacts 4h, opens reaction kettle, and
Material in reaction kettle is transferred in No. 1 water heating kettle, then calcium salt soln is added into No. 1 water heating kettle, and adjusts object in No. 1 water heating kettle
Expect pH to 9.5, to pH adjust after, No. 1 water heating kettle is closed, in temperature be 185 DEG C, revolving speed be 500r/min under the conditions of,
After hydro-thermal is stirred to react 8h, open No. 1 water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators, in temperature be 90
DEG C, under the conditions of pressure is 500mmHg, 60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 120 parts of concentrate feeds are successively taken,
60 parts of water, 10 parts of quick limes, 10 parts of sodium metasilicates, 5 parts of sodium metaaluminates, 15 parts of polyallylamines, first by concentrate feed, water, quick lime,
Sodium metasilicate, sodium metaaluminate and polyallylamine pour into No. 2 water heating kettles, and are continued into No. 2 water heating kettles with 400mL/min rate
Be passed through carbon dioxide gas, until pressure reaches 0.4MPa in No. 2 water heating kettles, then No. 2 water heating kettles are closed, in temperature be 140
DEG C, under the conditions of revolving speed is 800r/min, after hydro-thermal reaction 8h, stops heating, be cooled to room temperature under stirring, it is later on
No. 2 water heating kettles, discharging, obtain calcium plaster；Gained calcium plaster is injected in mold, control calcium plaster reaches the 72% of mold height, then
Mold is moved into baking oven, under the conditions of temperature is 55 DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, it demoulds,
Up to water proof building plasterboard.The concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.The calcium salt soln is that mass fraction is
20% calcium salt soln；The calcium salt is calcium nitrate.The sodium metasilicate is anhydrous sodium metasilicate.
According to parts by weight, 50 parts of ardealites, 80 parts of dehydrated alcohols, 8 parts of concentrated sulfuric acids, 40 parts of calcium salt solns, elder generation are successively taken
Ardealite and dehydrated alcohol are poured into ball grinder, and are that zirconium oxide ball milling pearl is added in 40:1 by ball material mass ratio, is in revolving speed
Under the conditions of 500r/min, after ball milling mixing 6h, discharging obtains ball milling slurry, then gained ball milling slurry and the concentrated sulfuric acid is mixed and poured into
In reaction kettle, it is 85 DEG C in temperature, under the conditions of revolving speed is 800r/min, after heating stirring reacts 4h, opens reaction kettle, and will be anti-
It answers material in kettle to be transferred in No. 1 water heating kettle, then calcium salt soln is added into No. 1 water heating kettle, and adjust material pH in No. 1 water heating kettle
It is after being adjusted to pH, No. 1 water heating kettle is closed to 9.5, in temperature be 185 DEG C, under the conditions of revolving speed is 500r/min, hydro-thermal
After being stirred to react 8h, open No. 1 water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators, in temperature be 90 DEG C,
Under the conditions of pressure is 500mmHg, 60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 120 parts of concentrate feeds are successively taken, 60
Part water, 10 parts of sodium metasilicates, 5 parts of sodium metaaluminates, 15 parts of polyallylamines, first by concentrate feed, water, sodium metasilicate, sodium metaaluminate and
Polyallylamine pours into No. 2 water heating kettles, and is continually fed into carbon dioxide gas into No. 2 water heating kettles with 400mL/min rate, directly
Into No. 2 water heating kettles, pressure reaches 0.4MPa, then No. 2 water heating kettles are closed, is 140 DEG C in temperature, revolving speed is 800r/min item
Under part, after hydro-thermal reaction 8h, stops heating, be cooled to room temperature under stirring, later on No. 2 water heating kettles, discharge, obtain stone
Cream slurry；Gained calcium plaster is injected in mold, control calcium plaster reaches the 72% of mold height, then mold is moved into baking oven, in
Under the conditions of temperature is 55 DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, and demoulds to get water proof building plasterboard.
The concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.The calcium salt soln is the calcium salt soln that mass fraction is 20%；It is described
Calcium salt is calcium nitrate.The sodium metasilicate is anhydrous sodium metasilicate.
According to parts by weight, 50 parts of ardealites, 80 parts of dehydrated alcohols, 8 parts of concentrated sulfuric acids, 40 parts of calcium salt solns, elder generation are successively taken
Ardealite and dehydrated alcohol are poured into ball grinder, and are that zirconium oxide ball milling pearl is added in 40:1 by ball material mass ratio, is in revolving speed
Under the conditions of 500r/min, after ball milling mixing 6h, discharging obtains ball milling slurry, then gained ball milling slurry and the concentrated sulfuric acid is mixed and poured into
In reaction kettle, it is 85 DEG C in temperature, under the conditions of revolving speed is 800r/min, after heating stirring reacts 4h, opens reaction kettle, and will be anti-
It answers material in kettle to be transferred in No. 1 water heating kettle, then calcium salt soln is added into No. 1 water heating kettle, and adjust material pH in No. 1 water heating kettle
It is after being adjusted to pH, No. 1 water heating kettle is closed to 9.5, in temperature be 185 DEG C, under the conditions of revolving speed is 500r/min, hydro-thermal
After being stirred to react 8h, open No. 1 water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators, in temperature be 90 DEG C,
Under the conditions of pressure is 500mmHg, 60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 120 parts of concentrate feeds are successively taken, 60
Part water, 10 parts of quick limes, 10 parts of sodium metasilicates, 5 parts of sodium metaaluminates, first by concentrate feed, water, quick lime, sodium metasilicate, meta-aluminic acid
Sodium pours into No. 2 water heating kettles, and is continually fed into carbon dioxide gas into No. 2 water heating kettles with 400mL/min rate, until No. 2
Pressure reaches 0.4MPa in water heating kettle, then No. 2 water heating kettles are closed, in temperature be 140 DEG C, revolving speed be 800r/min under the conditions of,
After hydro-thermal reaction 8h, stop heating, be cooled to room temperature under stirring, later on No. 2 water heating kettles, discharges, obtain calcium plaster；
Gained calcium plaster is injected in mold, control calcium plaster reaches the 72% of mold height, then mold is moved into baking oven, in temperature
Under the conditions of 55 DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, and demoulds to get water proof building plasterboard.It is described
The concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.The calcium salt soln is the calcium salt soln that mass fraction is 20%；The calcium salt
For calcium nitrate.The sodium metasilicate is anhydrous sodium metasilicate.
According to parts by weight, 50 parts of ardealites, 80 parts of dehydrated alcohols, 8 parts of concentrated sulfuric acids, 40 parts of calcium salt solns, elder generation are successively taken
Ardealite and dehydrated alcohol are poured into ball grinder, and are that zirconium oxide ball milling pearl is added in 40:1 by ball material mass ratio, is in revolving speed
Under the conditions of 500r/min, after ball milling mixing 6h, discharging obtains ball milling slurry, then gained ball milling slurry and the concentrated sulfuric acid is mixed and poured into
In reaction kettle, it is 85 DEG C in temperature, under the conditions of revolving speed is 800r/min, after heating stirring reacts 4h, opens reaction kettle, and will be anti-
It answers material in kettle to be transferred in No. 1 water heating kettle, then calcium salt soln is added into No. 1 water heating kettle, and adjust material pH in No. 1 water heating kettle
It is after being adjusted to pH, No. 1 water heating kettle is closed to 9.5, in temperature be 185 DEG C, under the conditions of revolving speed is 500r/min, hydro-thermal
After being stirred to react 8h, open No. 1 water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators, in temperature be 90 DEG C,
Under the conditions of pressure is 500mmHg, 60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 120 parts of concentrate feeds are successively taken, 60
Part water, 10 parts of quick limes, 5 parts of sodium metaaluminates, 15 parts of polyallylamines, first by concentrate feed, water, quick lime, sodium metaaluminate and polyene
Propylamine pours into No. 2 water heating kettles, and is continually fed into carbon dioxide gas into No. 2 water heating kettles with 400mL/min rate, until 2
Pressure reaches 0.4MPa in number water heating kettle, then No. 2 water heating kettles are closed, is 140 DEG C in temperature, revolving speed is 800r/min condition
Under, after hydro-thermal reaction 8h, stop heating, be cooled to room temperature under stirring, later on No. 2 water heating kettles, discharges, obtain gypsum
Slurry；Gained calcium plaster is injected in mold, control calcium plaster reaches the 72% of mold height, then mold is moved into baking oven, Yu Wen
Under the conditions of degree is 55 DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, and demoulds to get water proof building plasterboard.Institute
Stating the concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.The calcium salt soln is the calcium salt soln that mass fraction is 20%；The calcium
Salt is calcium nitrate.
According to parts by weight, 50 parts of ardealites, 80 parts of dehydrated alcohols, 8 parts of concentrated sulfuric acids, 40 parts of calcium salt solns, elder generation are successively taken
Ardealite and dehydrated alcohol are poured into ball grinder, and are that zirconium oxide ball milling pearl is added in 40:1 by ball material mass ratio, is in revolving speed
Under the conditions of 500r/min, after ball milling mixing 6h, discharging obtains ball milling slurry, then gained ball milling slurry and the concentrated sulfuric acid is mixed and poured into
In reaction kettle, it is 85 DEG C in temperature, under the conditions of revolving speed is 800r/min, after heating stirring reacts 4h, opens reaction kettle, and will be anti-
It answers material in kettle to be transferred in No. 1 water heating kettle, then calcium salt soln is added into No. 1 water heating kettle, and adjust material pH in No. 1 water heating kettle
It is after being adjusted to pH, No. 1 water heating kettle is closed to 9.5, in temperature be 185 DEG C, under the conditions of revolving speed is 500r/min, hydro-thermal
After being stirred to react 8h, open No. 1 water heating kettle, and material in No. 1 water heating kettle is transferred in Rotary Evaporators, in temperature be 90 DEG C,
Under the conditions of pressure is 500mmHg, 60min is concentrated under reduced pressure, obtains concentrate feed；According to parts by weight, 120 parts of concentrate feeds are successively taken, 60
Part water, 10 parts of quick limes, 10 parts of sodium metasilicates, 15 parts of polyallylamines, first by concentrate feed, water, quick lime, sodium metasilicate and polyene
Propylamine pours into No. 2 water heating kettles, and is continually fed into carbon dioxide gas into No. 2 water heating kettles with 400mL/min rate, until 2
Pressure reaches 0.4MPa in number water heating kettle, then No. 2 water heating kettles are closed, is 140 DEG C in temperature, revolving speed is 800r/min condition
Under, after hydro-thermal reaction 8h, stop heating, be cooled to room temperature under stirring, later on No. 2 water heating kettles, discharges, obtain gypsum
Slurry；Gained calcium plaster is injected in mold, control calcium plaster reaches the 72% of mold height, then mold is moved into baking oven, Yu Wen
Under the conditions of degree is 55 DEG C, heat preservation and dryness to constant weight discharges, and standing is cooled to room temperature, and demoulds to get water proof building plasterboard.Institute
Stating the concentrated sulfuric acid is the concentrated sulfuric acid that mass fraction is 98%.The calcium salt soln is the calcium salt soln that mass fraction is 20%；The calcium
Salt is calcium nitrate.The sodium metasilicate is anhydrous sodium metasilicate.
Comparative example: the building plasterboard of Ningbo decorative engineering Co., Ltd production.
1 to 6 gained plasterboard of example and comparative example product are subjected to performance detection, the specific detection method is as follows:
It will be put into the container for filling water under above-mentioned plasterboard room temperature, survey its water absorption rate for 24 hours.Water suction front and back GI-PH10 mine
The Mohs surface hardness of object hardness pen measurement sample.Specific testing result is as shown in table 1:
Table 1: performance detection table
| Detection content | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example |
| Water absorption rate/% for 24 hours | 4.76 | 12.70 | 9.89 | 11.87 | 10.83 | 11.39 | 18.13 |
| Absorb water front surface hardness | 5 | 4.2 | 4.5 | 4.3 | 4.5 | 4.6 | 4 |
| Absorb water rear surface hardness | 4.2 | 2.6 | 3.1 | 3.0 | 2.8 | 2.9 | 2.3 |
By 1 testing result of table it is found that present invention gained water proof building plasterboard has excellent waterproof performance and surface hardness.
Claims (6)
1. a kind of preparation method of water proof building plasterboard, it is characterised in that specific preparation step are as follows:
(1) according to parts by weight, 30~50 parts of ardealites are successively taken, 60~80 parts of dehydrated alcohols, 4~8 parts of concentrated sulfuric acids, 30~40
Part calcium salt soln obtains ball milling slurry first by ardealite and dehydrated alcohol mixing and ball milling, then ball milling slurry and the concentrated sulfuric acid are mixed instead
After answering 2~4h, calcium salt soln is added, and adjusts pH to alkalinity, after hydro-thermal is stirred to react 6~8h, concentration obtains concentrate feed；
(2) according to parts by weight, 80~120 parts of concentrate feeds are successively taken, 40~60 parts of water, 8~10 parts of quick limes, 8~10 parts partially
Sodium metasilicate, 3~5 parts of sodium metaaluminates, 10~15 parts of polyallylamines, first by concentrate feed, water, quick lime, sodium metasilicate, sodium metaaluminate
Poured into water heating kettle with polyallylamine, and be passed through carbon dioxide gas into water heating kettle, until in water heating kettle pressure up to 0.3~
0.4MPa, then it is heated be stirred to react after, be cooled to room temperature, open water heating kettle, discharging, obtain calcium plaster；
(3) calcium plaster is injected in mold, it is cooling after low temperature drying, it demoulds to get water proof building plasterboard.
2. a kind of preparation method of water proof building plasterboard according to claim 1, it is characterised in that step (1) is described dense
Sulfuric acid is the concentrated sulfuric acid that mass fraction is 96~98%.
3. a kind of preparation method of water proof building plasterboard according to claim 1, it is characterised in that step (1) described calcium
Salting liquid is the calcium salt soln that mass fraction is 10~20%；The calcium salt is calcium nitrate, any one in calcium chloride.
4. a kind of preparation method of water proof building plasterboard according to claim 1, it is characterised in that step (1) described tune
It is to adjust pH to 8.5~9.5 that pH, which is saved, to alkalinity.
5. a kind of preparation method of water proof building plasterboard according to claim 1, it is characterised in that step (2) is described partially
Sodium metasilicate is anhydrous sodium metasilicate, one of five hydrated sodium metasilicates or nine hydrated sodium metasilicates.
6. a kind of preparation method of water proof building plasterboard according to claim 1, it is characterised in that step (3) is described low
Temperature drying are as follows: under the conditions of temperature is 45~55 DEG C, drying to constant weight.
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Application publication date: 20181218 |