CN114057439A - Elastic mortar for building exterior wall and preparation process thereof - Google Patents
Elastic mortar for building exterior wall and preparation process thereof Download PDFInfo
- Publication number
- CN114057439A CN114057439A CN202111531847.9A CN202111531847A CN114057439A CN 114057439 A CN114057439 A CN 114057439A CN 202111531847 A CN202111531847 A CN 202111531847A CN 114057439 A CN114057439 A CN 114057439A
- Authority
- CN
- China
- Prior art keywords
- parts
- stirring
- mortar
- purified
- elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2641—Polyacrylates; Polymethacrylates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
- C08F283/008—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00 on to unsaturated polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
-
- 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
-
- 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
-
- 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
- C04B2111/50—Flexible or elastic materials
- C04B2111/503—Elastic materials
Abstract
The invention relates to elastic mortar for building exterior walls and a preparation process thereof, wherein the elastic mortar comprises the following raw materials in parts by weight: 15-25 parts of dispersible latex powder, 550 parts of 450-plus 425 cement, 1-3 parts of short fiber, 5-10 parts of wood fiber, 2-5 parts of MC, 500 parts of 450-plus quartz sand and 550 parts of 500-plus waterproof elastic emulsion; the waterproof elastic emulsion is prepared by adding the aqueous solution of the mixed solution and the initiator in the preparation process, carbon-carbon double bonds at two ends of the reaction monomer can be polymerized with the double bonds of the acrylate monomer in the reaction process to generate micro-crosslinking, the prepared waterproof elastic emulsion has the advantages of polyurethane and acrylate emulsion, and organic solvent is not used to prevent environmental pollution.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to elastic mortar for a building outer wall and a preparation process thereof.
Background
Mortar is a bonding substance used for building bricks on buildings, and is formed by adding water into sand and cementing materials (cement, lime paste, clay and the like) according to a certain proportion, and is also called mortar and also used as mortar. The common mortar can also be classified as lime mortar. The mortar is prepared from lime cream, sand and water according to a certain proportion, and is generally used for masonry and a plastering layer which have low strength requirement and are not affected by humidity; cement mortar. The mortar is prepared from cement, sand and water according to a certain proportion, and is generally used for brickworks, wall surfaces or ground surfaces and the like in a humid environment or water; and thirdly, mixing the mortar. The mortar is prepared by adding proper admixture such as fly ash, diatomite and the like into cement or lime mortar, so that the using amount of the cement or lime is saved, and the workability of the mortar is improved. The common mixed mortar includes cement lime mortar, cement clay mortar, lime clay mortar, etc.
The exterior wall elastic mortar is mainly prepared from environment-friendly emulsion, cement, quartz sand, rubber powder and the like in proportion. The elastic mortar is suitable for heat preservation and water prevention of indoor and outdoor walls of various buildings and roof decoration, but the conventional elastic mortar for the outer walls has short service life and is easily corroded by the external environment after a long time.
Disclosure of Invention
The invention aims to provide elastic mortar for building exterior walls and a preparation process thereof.
The purpose of the invention can be realized by the following technical scheme:
the elastic mortar for the building exterior wall comprises the following raw materials in parts by weight: 15-25 parts of dispersible latex powder, 550 parts of 450-plus 425 cement, 1-3 parts of short fiber, 5-10 parts of wood fiber, 2-5 parts of MC, 500 parts of 450-plus quartz sand and 550 parts of 500-plus waterproof elastic emulsion;
the waterproof elastic emulsion is prepared by the following steps:
s1, placing 2, 4-toluene diisocyanate in a reaction kettle, heating in a water bath at 55-60 ℃, adding dehydrated polyether glycol, stirring at a constant speed and reacting for 30min, then heating to 80 ℃, continuing to stir and reacting for 3h to obtain a prepolymer, controlling the molar ratio of 2, 4-toluene diisocyanate to polyether glycol to be 2: 1, then adding pentaerythritol triacrylate, stirring at a constant speed of 350-500r/min and reacting for 3h, adding no solvent, ensuring the reaction to proceed by increasing the stirring speed to obtain a reaction monomer, and controlling the molar ratio of prepolymer to pentaerythritol triacrylate to be 1: 2;
in the step S1, 2, 4-toluene diisocyanate reacts with polyether diol to generate an intermediate a, and then pentaerythritol triacrylate is added to react with the intermediate a to generate a reaction monomer, wherein the reaction process is as follows:
step S2, adding OP-10 and sodium bicarbonate into a four-neck flask filled with deionized water, uniformly stirring for 15min to prepare a mixed solution, and controlling the weight ratio of the OP-10 to the sodium bicarbonate to the deionized water to be 1-2: 0.1: 10; mixing the purified methyl methacrylate, the purified butyl acrylate and the reaction monomer, and uniformly stirring for 10min to prepare a mixed monomer, wherein the weight ratio of the purified methyl methacrylate to the purified butyl acrylate to the reaction monomer is controlled to be 1-2: 1; adding sodium persulfate into deionized water to prepare a solution b; and (3) slowly adding the mixed monomer and the solution b into the mixed solution in sequence, stirring at a constant speed, reacting for 4 hours, heating in a water bath at 70-80 ℃, keeping the temperature, continuously reacting for 2 hours, dropwise adding ammonia water after the reaction is finished to adjust the pH until the system is neutral, and filtering to obtain the waterproof elastic emulsion, wherein the weight ratio of the mixed monomer to the mixed solution to the sodium persulfate to the mixed solution is controlled to be 10: 0.05-0.06: 0.2-0.3.
In the step S2, firstly, an emulsifier and sodium bicarbonate are mixed to prepare a mixed solution, sodium persulfate is added to serve as an initiator, then a mixed monomer is prepared, the mixed solution and an aqueous solution of the initiator are added to prepare the waterproof elastic emulsion, carbon-carbon double bonds at two ends of the reacted monomer can be polymerized with double bonds of an acrylate monomer in the reaction process to generate micro-crosslinking, and the prepared waterproof elastic emulsion has the advantages of polyurethane and acrylate emulsion, does not use an organic solvent and prevents the environment from being polluted.
Further: the mesh number of the quartz sand is 100 meshes.
Further: the purified methyl methacrylate and the purified butyl acrylate are prepared by the following steps:
adding methyl methacrylate and butyl acrylate into a separating funnel respectively, adding a sodium hydroxide solution with the mass fraction of 5-10%, washing, standing for 30min, removing lower-layer liquid, repeating for three times, and then carrying out reduced pressure distillation to obtain purified methyl methacrylate and purified butyl acrylate.
A preparation process of elastic mortar for building exterior walls comprises the following steps:
uniformly mixing the dispersible latex powder, 425 cement, short fibers, wood fibers, MC and quartz sand at the rotating speed of 30-50r/min, adding the waterproof elastic emulsion, and continuously stirring for 10min to obtain the elastic mortar.
The invention has the beneficial effects that:
the elastic mortar of the invention takes dispersible latex powder, 425 cement, quartz sand and the like as matrix materials, waterproof elastic emulsion is added to endow the elastic mortar with excellent waterproof and corrosion-resistant performance, and the corrosion action of the elastic mortar by the external environment is reduced, in the preparation process of the waterproof elastic emulsion, 2, 4-toluene diisocyanate reacts with polyether glycol in the step S1 to generate an intermediate a, pentaerythritol triacrylate is added to react with the intermediate a to generate a reaction monomer, an emulsifier and sodium bicarbonate are mixed to prepare a mixed solution, sodium persulfate is added to serve as an initiator to prepare a mixed monomer, the mixed solution and an aqueous solution of the initiator are added to prepare the waterproof elastic emulsion, carbon-carbon double bonds at two ends of the reaction monomer can be polymerized with double bonds of an acrylate monomer in the reaction process to generate micro-crosslinking, and the waterproof elastic emulsion is prepared and has the advantages of polyurethane and acrylate emulsion, and no organic solvent is used, so that the pollution to the environment is prevented.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The waterproof elastic emulsion is prepared by the following steps:
step S1, placing 2, 4-toluene diisocyanate in a reaction kettle, heating in a water bath at 55 ℃, adding dehydrated polyether glycol, stirring at a constant speed and reacting for 30min, then heating to 80 ℃, continuing stirring and reacting for 3h to obtain a prepolymer, controlling the molar ratio of 2, 4-toluene diisocyanate to polyether glycol to be 2: 1, then adding pentaerythritol triacrylate, stirring at a constant speed of 350r/min and reacting for 3h, adding no solvent, ensuring the reaction to be carried out by increasing the stirring speed, preparing a reaction monomer, and controlling the molar ratio of prepolymer to pentaerythritol triacrylate to be 1: 2;
step S2, adding OP-10 and sodium bicarbonate into a four-neck flask filled with deionized water, uniformly stirring for 15min to prepare a mixed solution, and controlling the weight ratio of the OP-10 to the sodium bicarbonate to the deionized water to be 1: 0.1: 10; mixing the purified methyl methacrylate, the purified butyl acrylate and the reaction monomer, and uniformly stirring for 10min to prepare a mixed monomer, wherein the weight ratio of the purified methyl methacrylate to the purified butyl acrylate to the reaction monomer is controlled to be 1: 1; adding sodium persulfate into deionized water to prepare a solution b; and (3) slowly adding the mixed monomer and the solution b into the mixed solution in sequence, stirring at a constant speed, reacting for 4 hours, heating in a water bath at 70 ℃, keeping the temperature, continuously reacting for 2 hours, dropwise adding ammonia water after the reaction is finished to adjust the pH until the system is neutral, and filtering to obtain the waterproof elastic emulsion, wherein the weight ratio of the mixed monomer to the sodium persulfate to the mixed solution is controlled to be 10: 0.05: 0.2.
The purified methyl methacrylate and the purified butyl acrylate are prepared by the following steps:
adding methyl methacrylate and butyl acrylate into a separating funnel respectively, adding a sodium hydroxide solution with the mass fraction of 5%, washing, standing for 30min, removing lower-layer liquid, repeating for three times, and then carrying out reduced pressure distillation to obtain purified methyl methacrylate and purified butyl acrylate.
Example 2
The waterproof elastic emulsion is prepared by the following steps:
s1, placing 2, 4-toluene diisocyanate in a reaction kettle, heating in a water bath at 58 ℃, adding dehydrated polyether glycol, stirring at a constant speed and reacting for 30min, then heating to 80 ℃, continuing to stir and react for 3h to obtain a prepolymer, controlling the molar ratio of 2, 4-toluene diisocyanate to polyether glycol to be 2: 1, then adding pentaerythritol triacrylate, stirring at a constant speed of 500r/min and reacting for 3h, adding no solvent, ensuring the reaction to be carried out by increasing the stirring speed, preparing a reaction monomer, and controlling the molar ratio of the prepolymer to the pentaerythritol triacrylate to be 1: 2;
step S2, adding OP-10 and sodium bicarbonate into a four-neck flask filled with deionized water, stirring at a constant speed for 15min to prepare a mixed solution, and controlling the weight ratio of the OP-10 to the sodium bicarbonate to the deionized water to be 1.5: 0.1: 10; mixing the purified methyl methacrylate, the purified butyl acrylate and the reaction monomer, and uniformly stirring for 10min to prepare a mixed monomer, wherein the weight ratio of the purified methyl methacrylate to the purified butyl acrylate to the reaction monomer is controlled to be 1.5: 1; adding sodium persulfate into deionized water to prepare a solution b; and (3) slowly adding the mixed monomer and the solution b into the mixed solution in sequence, stirring at a constant speed, reacting for 4 hours, heating in a water bath at 80 ℃, keeping the temperature, continuously reacting for 2 hours, dropwise adding ammonia water after the reaction is finished to adjust the pH until the system is neutral, and filtering to obtain the waterproof elastic emulsion, wherein the weight ratio of the mixed monomer to the sodium persulfate to the mixed solution is controlled to be 10: 0.05: 0.3.
The purified methyl methacrylate and the purified butyl acrylate are prepared by the following steps:
adding methyl methacrylate and butyl acrylate into a separating funnel respectively, adding a sodium hydroxide solution with the mass fraction of 8%, washing, standing for 30min, removing lower-layer liquid, repeating for three times, and then carrying out reduced pressure distillation to obtain purified methyl methacrylate and purified butyl acrylate.
Example 3
The waterproof elastic emulsion is prepared by the following steps:
step S1, placing 2, 4-toluene diisocyanate in a reaction kettle, heating in a water bath at 60 ℃, adding dehydrated polyether glycol, stirring at a constant speed and reacting for 30min, then heating to 80 ℃, continuing stirring and reacting for 3h to obtain a prepolymer, controlling the molar ratio of 2, 4-toluene diisocyanate to polyether glycol to be 2: 1, then adding pentaerythritol triacrylate, stirring at a constant speed of 500r/min and reacting for 3h, adding no solvent, ensuring the reaction to be carried out by increasing the stirring speed, preparing a reaction monomer, and controlling the molar ratio of prepolymer to pentaerythritol triacrylate to be 1: 2;
step S2, adding OP-10 and sodium bicarbonate into a four-neck flask filled with deionized water, stirring at a constant speed for 15min to prepare a mixed solution, and controlling the weight ratio of the OP-10 to the sodium bicarbonate to the deionized water to be 1.5: 0.1: 10; mixing the purified methyl methacrylate, the purified butyl acrylate and the reaction monomer, and uniformly stirring for 10min to prepare a mixed monomer, wherein the weight ratio of the purified methyl methacrylate to the purified butyl acrylate to the reaction monomer is controlled to be 2: 1; adding sodium persulfate into deionized water to prepare a solution b; and (3) slowly adding the mixed monomer and the solution b into the mixed solution in sequence, stirring at a constant speed, reacting for 4 hours, heating in a water bath at 80 ℃, keeping the temperature, continuously reacting for 2 hours, dropwise adding ammonia water after the reaction is finished to adjust the pH until the system is neutral, and filtering to obtain the waterproof elastic emulsion, wherein the weight ratio of the mixed monomer to the sodium persulfate to the mixed solution is controlled to be 10: 0.06: 0.3.
The purified methyl methacrylate and the purified butyl acrylate are prepared by the following steps:
adding methyl methacrylate and butyl acrylate into a separating funnel respectively, adding a sodium hydroxide solution with the mass fraction of 10%, washing, standing for 30min, removing lower-layer liquid, repeating for three times, and then carrying out reduced pressure distillation to obtain purified methyl methacrylate and purified butyl acrylate.
Example 4
The elastic mortar for the building exterior wall comprises the following raw materials in parts by weight: 15 parts of dispersible latex powder, 450 parts of 425 cement, 1 part of polyester staple fiber, 5 parts of wood fiber, 2 parts of MC, 450 parts of quartz sand and 500 parts of the waterproof elastic emulsion prepared in example 1;
uniformly mixing the dispersible latex powder, 425 cement, polyester staple fiber, wood fiber, MC and quartz sand at the rotating speed of 30r/min, adding the waterproof elastic emulsion prepared in the embodiment 1, and continuously stirring for 10min to prepare the elastic mortar.
The dispersible latex is produced by Anhui Wei Huashan New Material, Limited liability company, Anhui province.
Example 5
The elastic mortar for the building exterior wall comprises the following raw materials in parts by weight: 20 parts of dispersible latex powder, 500 parts of 425 cement, 2 parts of polyester staple fiber, 8 parts of wood fiber, 3 parts of MC, 480 parts of quartz sand and 520 parts of the waterproof elastic emulsion prepared in example 1;
uniformly mixing the dispersible latex powder, 425 cement, polyester staple fiber, wood fiber, MC and quartz sand at the rotating speed of 40r/min, adding the waterproof elastic emulsion prepared in the embodiment 1, and continuously stirring for 10min to prepare the elastic mortar.
The dispersible latex is produced by Anhui Wei Huashan New Material, Limited liability company, Anhui province.
Example 6
The elastic mortar for the building exterior wall comprises the following raw materials in parts by weight: 25 parts of dispersible latex powder, 550 parts of 425 cement, 3 parts of polyester staple fiber, 10 parts of wood fiber, 5 parts of MC, 500 parts of quartz sand and 550 parts of the waterproof elastic emulsion prepared in the example 1;
uniformly mixing the dispersible latex powder, 425 cement, polyester staple fiber, wood fiber, MC and quartz sand at the rotating speed of 50r/min, adding the waterproof elastic emulsion prepared in the embodiment 1, and continuously stirring for 10min to prepare the elastic mortar.
The dispersible latex is produced by Anhui Wei Huashan New Material, Limited liability company, Anhui province.
Comparative example 1
This comparative example compares to example 4 with an acrylic ester elastomeric emulsion instead of a water-resistant elastomeric emulsion.
Comparative example 2
The comparative example is mortar for building exterior wall produced by a certain company on the market.
The test was carried out according to the specification of JCJ/T70-2009 Standard test method for basic Performance of building mortar, and the results are shown in the following table:
it can be seen from the above table that inventive examples 4 to 6 have excellent properties relative to comparative documents 1 and 2.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (6)
1. The elastic mortar for the building outer wall is characterized in that: the feed comprises the following raw materials in parts by weight: 15-25 parts of dispersible latex powder, 550 parts of 450-plus 425 cement, 1-3 parts of short fiber, 5-10 parts of wood fiber, 2-5 parts of MC, 500 parts of 450-plus quartz sand and 550 parts of 500-plus waterproof elastic emulsion;
the waterproof elastic emulsion is prepared by the following steps:
s1, placing 2, 4-toluene diisocyanate in a reaction kettle, heating in a water bath at 55-60 ℃, adding dehydrated polyether glycol, stirring at a constant speed and reacting for 30min, then heating to 80 ℃, continuing stirring and reacting for 3h to obtain a prepolymer, controlling the molar ratio of the 2, 4-toluene diisocyanate to the polyether glycol to be 2: 1, then adding pentaerythritol triacrylate, stirring at a constant speed at a rotation speed of 350-plus 500r/min and reacting for 3h to obtain a reaction monomer;
step S2, adding OP-10 and sodium bicarbonate into a four-neck flask filled with deionized water, and stirring at a constant speed for 15min to obtain a mixed solution; mixing the purified methyl methacrylate, the purified butyl acrylate and the reaction monomer, and stirring at a constant speed for 10min to prepare a mixed monomer; adding sodium persulfate into deionized water to prepare a solution b; and (3) sequentially and slowly adding the mixed monomer and the solution b into the mixed solution, stirring at a constant speed, reacting for 4 hours, heating in a water bath at 70-80 ℃, keeping the temperature, continuously reacting for 2 hours, dropwise adding ammonia water after the reaction is finished, adjusting the pH until the system is neutral, and filtering to obtain the waterproof elastic emulsion.
2. The elastic mortar for building exterior walls according to claim 1, wherein: in step S1, the molar ratio of the prepolymer to the pentaerythritol triacrylate is controlled to 1: 2.
3. The elastic mortar for building exterior walls according to claim 1, wherein: in step S2, the weight ratio of OP-10, sodium bicarbonate and deionized water is controlled to be 1-2: 0.1: 10, the weight ratio of the purified methyl methacrylate, the purified butyl acrylate and the reaction monomer is controlled to be 1-2: 1, and the weight ratio of the mixed monomer, the sodium persulfate and the mixed solution is controlled to be 10: 0.05-0.06: 0.2-0.3.
4. The elastic mortar for building exterior walls according to claim 1, wherein: the mesh number of the quartz sand is 100 meshes.
5. The elastic mortar for building exterior walls according to claim 1, wherein: the purified methyl methacrylate and the purified butyl acrylate are prepared by the following steps:
adding methyl methacrylate and butyl acrylate into a separating funnel respectively, adding a sodium hydroxide solution with the mass fraction of 5-10%, washing, standing for 30min, removing lower-layer liquid, repeating for three times, and then carrying out reduced pressure distillation to obtain purified methyl methacrylate and purified butyl acrylate.
6. The preparation process of the elastic mortar for the exterior wall of the building, according to claim 1, is characterized in that: the method comprises the following steps:
uniformly mixing the dispersible latex powder, 425 cement, short fibers, wood fibers, MC and quartz sand at the rotating speed of 30-50r/min, adding the waterproof elastic emulsion, and continuously stirring for 10min to obtain the elastic mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111531847.9A CN114057439A (en) | 2021-12-15 | 2021-12-15 | Elastic mortar for building exterior wall and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111531847.9A CN114057439A (en) | 2021-12-15 | 2021-12-15 | Elastic mortar for building exterior wall and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114057439A true CN114057439A (en) | 2022-02-18 |
Family
ID=80229534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111531847.9A Pending CN114057439A (en) | 2021-12-15 | 2021-12-15 | Elastic mortar for building exterior wall and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114057439A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105294958A (en) * | 2015-11-30 | 2016-02-03 | 桂林市和鑫防水装饰材料有限公司 | Waterborne polyurethane modified acrylate emulsion preparation method |
| WO2017104671A1 (en) * | 2015-12-18 | 2017-06-22 | ジャパンコーティングレジン株式会社 | Method for producing aqueous synthetic resin emulsion, method for producing reemulsifiable synthetic resin powder, method for producing polymer cement mortar, aqueous synthetic resin emulsion, and reemulsifiable synthetic resin powder |
| CN110342888A (en) * | 2019-08-12 | 2019-10-18 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of high ductility thermal insulation mortar |
| CN113149837A (en) * | 2020-01-07 | 2021-07-23 | 中国石油天然气股份有限公司 | Method for purifying methacrylic acid high carbon alcohol ester |
-
2021
- 2021-12-15 CN CN202111531847.9A patent/CN114057439A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105294958A (en) * | 2015-11-30 | 2016-02-03 | 桂林市和鑫防水装饰材料有限公司 | Waterborne polyurethane modified acrylate emulsion preparation method |
| WO2017104671A1 (en) * | 2015-12-18 | 2017-06-22 | ジャパンコーティングレジン株式会社 | Method for producing aqueous synthetic resin emulsion, method for producing reemulsifiable synthetic resin powder, method for producing polymer cement mortar, aqueous synthetic resin emulsion, and reemulsifiable synthetic resin powder |
| CN110342888A (en) * | 2019-08-12 | 2019-10-18 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of high ductility thermal insulation mortar |
| CN113149837A (en) * | 2020-01-07 | 2021-07-23 | 中国石油天然气股份有限公司 | Method for purifying methacrylic acid high carbon alcohol ester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4741777A (en) | Dry mix for high workability stuccos and mortars | |
| US10259749B2 (en) | Premixed hybrid grout | |
| CN101481443A (en) | Polyurethane-polyacrylacid ester interpenetrating network polymer, preparation and use thereof | |
| EP0728715A1 (en) | Process for hydrophobing gypsum products | |
| KR20080105845A (en) | Waterproof agent for elastic membrane and preparing method thereof | |
| CN110734245A (en) | Hydration heat inhibition type concrete anti-cracking waterproof agent, preparation method and application thereof | |
| CN112521719A (en) | Water-based epoxy resin cement-based slurry as well as preparation method and application thereof | |
| CN110937874A (en) | Gypsum mortar with high water resistance and preparation method thereof | |
| CN114163877A (en) | Concrete base layer interface agent for preventing plastering gypsum mortar layer from foaming and preparation method thereof | |
| CN101423591A (en) | Wall material adhesive and preparation process and application thereof | |
| CN114057439A (en) | Elastic mortar for building exterior wall and preparation process thereof | |
| CN104649606A (en) | High-efficiency and environment-friendly compound water reducer | |
| CN111073486A (en) | Environment-friendly polyurethane waterproof material and preparation method thereof | |
| KR102337544B1 (en) | Water-soluble Urethane Mortar Composition | |
| KR100873480B1 (en) | Liquid coating for waterproof agent and preparing method thereof | |
| CN104761183A (en) | Super-hydrophobic artificial marble and preparation method thereof | |
| KR100861986B1 (en) | The one water-type waterproof and maunfacturing method thereof | |
| CN110550907A (en) | Water-based modified polypropylene polymer cement-based waterproof slurry and preparation method thereof | |
| CN113501918B (en) | Easily-stored high-performance polycarboxylate superplasticizer and preparation method thereof | |
| CN109517509B (en) | Quick-drying type polyurethane waterproof coating | |
| CN113105197B (en) | Waterproof and anticorrosive mortar convenient for construction and preparation method and application thereof | |
| CN113698132B (en) | Rock-gathering liquid and rock-gathering composite board and preparation method thereof | |
| CN109020325B (en) | Modified cement engineering material with waterproof and crack-resistant performances | |
| CN113548832B (en) | Alkali-free liquid foam concrete conditioning and solidifying agent and preparation method thereof | |
| CN115895430B (en) | Water-based composite resin bi-component polyurethane waterproof coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220218 |