CN109942258B - Polymer cement waterproof coating resistant to efflorescence and preparation method thereof - Google Patents
Polymer cement waterproof coating resistant to efflorescence and preparation method thereof Download PDFInfo
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- CN109942258B CN109942258B CN201910345498.8A CN201910345498A CN109942258B CN 109942258 B CN109942258 B CN 109942258B CN 201910345498 A CN201910345498 A CN 201910345498A CN 109942258 B CN109942258 B CN 109942258B
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Abstract
The invention discloses a polymer cement waterproof coating resisting whiskering and a preparation method thereof, wherein the waterproof coating comprises the following components: liquid materials and powder materials; the liquid material comprises the following components in parts by mass: 85-95 parts of polymer emulsion, 0.1-1 part of defoaming agent, 0.05-0.1 part of mildew preventive and 5-15 parts of water; the powder material comprises the following components in parts by mass: 80-40 parts of cement, 0.1-1 part of ammonium oxalate powder, 20-60 parts of quartz powder and 0.1-1 part of water reducing agent. The JS waterproof coating has the property of resisting saltpetering and has good physical and mechanical properties; can obviously improve the efflorescence resistance of the waterproof coating and the durability of the building surface layer.
Description
Technical Field
The invention belongs to the technical field of waterproof coatings, and particularly relates to a polymer cement waterproof coating resistant to whiskering and a preparation method thereof.
Background
With the continuous development and refinement of the domestic coating industry, the market has more and more outstanding requirements on coatings with special functionality. In the subdivided field of waterproof coatings, various problems remain that are difficult to solve.
The JS waterproof coating is polymer cement waterproof coating, also called JS composite waterproof coating; it is a waterproof material widely used in the current market; the JS waterproof paint is a green environment-friendly material, which does not pollute the environment, has stable performance, excellent aging resistance and long waterproof life; the method is safe to use, convenient to construct and simple to operate, and can be directly constructed on a damp base surface without open water; the adhesive force is strong, the material and a cement base surface have good adhesive strength, and the adhesive has good adhesive property to most materials; the material has good elasticity and good elongation, so that the cracking resistance, the freezing resistance and the low-temperature flexibility are excellent; the workability is good, no bubble is generated, the film forming effect is good, and the curing is fast; the construction is simple, and the brush coating, the roller coating, the spray coating and the scraping coating can be carried out. The method is widely applied to indoor areas such as kitchens, toilets, balconies and the like. The main gel materials of the JS waterproof paint are portland cement, polymer emulsion and the like, and the JS waterproof paint also has the problem of efflorescence because the JS waterproof paint belongs to cement products. Alkali salts mainly comprising Ca (OH)2 and Mg (OH)2 which are released in the waterproof coating film are taken out in the moisture migration process, crystals are formed on the surface of the coating, and after long-term accumulation, the decorative material on the surface is jacked up, so that whitening, peeling and falling-off are generated, and 'saltpetering' is formed.
And the saltpetering limits the application range of the JS waterproof coating to a certain extent. At present, the problem of whiskering of JS waterproof coatings is solved, and a method for obstructing the water migration in waterproof coating films is mainly adopted, so that the aim of whiskering resistance is fulfilled; however, the above method is not very satisfactory in terms of the effect of preventing efflorescence.
Disclosure of Invention
The invention aims to provide a polymer cement waterproof coating with efflorescence resistance, which aims to solve the efflorescence problem of the waterproof coating, further protect building materials from being jacked up by accumulated alkali salt substances such as Ca, Mg and the like, and greatly improve the quality, the appearance and the durability of buildings.
In order to achieve the above object, an aspect of the present invention provides a polymer cement waterproof coating material resistant to saltpetering, comprising: liquid materials and powder materials;
the liquid material comprises the following components in parts by mass: 85-95 parts of polymer emulsion, 0.1-1 part of defoaming agent, 0.05-0.1 part of mildew preventive and 5-15 parts of water;
the powder material comprises the following components in parts by mass: 80-40 parts of cement, 0.1-1 part of ammonium oxalate powder, 20-60 parts of quartz powder and 0.1-1 part of water reducing agent.
Another aspect of the present invention provides a method for preparing the above waterproof coating material, comprising:
(1) vacuumizing the polymer emulsion, water, the defoaming agent and the mildew preventive, and then uniformly mixing to obtain the liquid material;
(2) firstly, uniformly mixing cement and quartz powder to obtain a mixed material; and then uniformly mixing the mixed material, ammonium oxalate powder and a water reducing agent to obtain the powder material.
The technical scheme of the invention has the following beneficial effects:
the JS waterproof coating has the property of resisting saltpetering and has good physical and mechanical properties; can obviously improve the efflorescence resistance of the waterproof coating and the durability of the building surface layer.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
One aspect of the present invention provides a polymer cement waterproof coating material resistant to efflorescence, comprising: liquid materials and powder materials;
the liquid material comprises the following components in parts by mass: 85-95 parts of polymer emulsion, 0.1-1 part of defoaming agent, 0.05-0.1 part of mildew preventive and 5-15 parts of water;
the powder material comprises the following components in parts by mass: 80-40 parts of cement, 0.1-1 part of ammonium oxalate powder, 20-60 parts of quartz powder and 0.1-1 part of water reducing agent.
In the present invention, ammonium oxalate ((NH) is added to the powder of the water-proof paint4)2C2O4) When the liquid and powder materials are mutually matched, the cement hydration reaction begins to proceed, (NH)4)2C2O4Ca (OH) produced by hydration reaction with cement2And Mg (OH)2Reaction to generate CaC2O4Precipitate, MgC2O4And (4) precipitating. The specific chemical reaction formula is as follows:
(NH4)2C2O4+Mg(OH)2＝MgC2O4↓+NH3H2O
(NH4)2C2O4+Ca(OH)2＝CaC2O4↓+NH3H2O
when the cement hydration reaction of the waterproof coating is carried out, Ca and Mg ions are solidified through the reaction mechanism, so that calcium and magnesium alkali salts causing whiskering are cut off, and the aim of inhibiting whiskering is fulfilled.
According to the invention, ammonium oxalate powder is added into the waterproof coating to remove calcium and magnesium alkali salts causing efflorescence, and simultaneously, the generated precipitate can fill pores of the polymer cement waterproof coating, so that the strength of the waterproof coating is increased.
According to the invention, preferably, the mass ratio of the liquid material to the powder material is 1: 1-2.
According to the present invention, preferably, the polymer emulsion is an acrylate emulsion.
According to the invention, preferably, the cement is portland cement; preferably PO42.5 portland cement.
According to the present invention, preferably, the antifoaming agent is at least one of a silicone antifoaming agent, a polyether antifoaming agent, a mineral oil antifoaming agent, and a vegetable oil antifoaming agent.
According to the present invention, preferably, the water reducing agent is at least one of a polycarboxylic acid-based water reducing agent, a melamine-based water reducing agent, and a naphthalene-based water reducing agent.
Preferably, the mildew preventive is a kaempferia disinfection mildew preventive.
Another aspect of the present invention provides a method for preparing the above waterproof coating material, comprising:
(1) vacuumizing the polymer emulsion, water, the defoaming agent and the mildew preventive, and then uniformly mixing to obtain the liquid material;
(2) firstly, uniformly mixing cement and quartz powder to obtain a mixed material; and then uniformly mixing the mixed material, ammonium oxalate powder and a water reducing agent to obtain the powder material.
In the present invention, the generation of bubbles during mixing is prevented by vacuuming.
According to the present invention, preferably, in step (1), the mixing conditions are: firstly stirring for 15-30min at the stirring speed of 200-400r/min, and then stirring for 1-3min at the stirring speed of 100-180 r/min.
According to the invention, preferably, in the step (2), firstly, stirring is carried out for 1-3min at a stirring speed of 400-800r/min to obtain the mixed material; then stirring for 1-3min at the stirring speed of 400-800r/min to obtain the powder.
According to the invention, the powder is prepared step by step, so that the ammonium oxalate powder and the water reducing agent are more uniformly dispersed in the cement and the quartz powder, and the prepared waterproof coating has better alkali resistance.
In the present invention, each raw material for preparing the saltpetering-resistant polymer cement waterproofing paint of the present invention can be commercially available.
The invention is further illustrated by the following examples:
the acrylate emulsions used in the following examples and comparative examples were obtained from RSO6000 emulsion from Bady Fukulturen Co., Ltd; the cement is PO42.5 portland cement from Anhui conch cement GmbH; ammonium oxalate powder was purchased from Jiangsu Koronto food compounding Co., Ltd; silicone antifoam was purchased from dow corning company 1520; the Kathon bactericidal mildewcide is purchased from Lizai chemical Co., Ltd, in Foshan city, and has the brand number of JL-8801D; the naphthalene water reducer is obtained from FDN-C of Wanshan chemical Co.Ltd in Shandong; aluminum sulfate powder was purchased from san feng environmental group ltd.
Example 1
This embodiment provides a saltpetering resistant polymeric cement waterproofing coating comprising: liquid materials and powder materials;
the liquid material comprises the following components in parts by mass: 95 parts of acrylate emulsion, 1 part of defoaming agent, 0.1 part of mildew preventive and 5 parts of water; wherein the defoaming agent is an organic silicon defoaming agent, and the mildew preventive is a Kathon bactericidal mildew preventive;
the powder material comprises the following components in parts by mass: 80 parts of cement, 1 part of ammonium oxalate powder, 20 parts of quartz powder and 1 part of water reducing agent; wherein the water reducing agent is a naphthalene water reducing agent;
the preparation method comprises the following steps:
(1) preparing a liquid material: preparing the liquid material by selecting a stirring container capable of being connected with a vacuum pump for vacuum pumping, sequentially adding the acrylate emulsion, water, the defoaming agent and the mildew preventive in sequence, closing a feeding port, opening the vacuum pump for vacuum pumping, opening stirring to control the stirring speed to be 300r/min, continuously stirring for 20 minutes, reducing the stirring speed to 150r/min, continuously stirring for 2 minutes, closing the stirring, closing the vacuum pump, discharging and packaging (the liquid material is prepared);
(2) preparing powder: the preparation of the powder is divided into two steps
Adding cement and quartz powder into small material pre-dispersion stirring equipment, starting stirring at the rotating speed of 600r/min, pre-dispersing and stirring for 2 minutes, and stopping the stirring equipment, thus finishing pre-dispersion; obtaining a mixed material;
and (3) adding the water reducing agent and the ammonium oxalate powder into the mixed material in sequence, starting stirring at the rotating speed of 600r/min, stopping stirring after continuously stirring for 2 minutes, and discharging and packaging (powder preparation is finished).
Example 2
This embodiment provides a saltpetering resistant polymeric cement waterproofing coating comprising: liquid materials and powder materials;
the liquid material comprises the following components in parts by mass: 90 parts of acrylate emulsion, 0.8 part of defoaming agent, 0.08 part of mildew preventive and 10 parts of water; wherein the defoaming agent is an organic silicon defoaming agent, and the mildew preventive is a Kathon bactericidal mildew preventive;
the powder material comprises the following components in parts by mass: 60 parts of cement, 0.5 part of ammonium oxalate powder, 40 parts of quartz powder and 0.5 part of water reducing agent; wherein the water reducing agent is a naphthalene water reducing agent;
the preparation method of this example is the same as example 1.
Example 3
This embodiment provides a saltpetering resistant polymeric cement waterproofing coating comprising: liquid materials and powder materials;
the liquid material comprises the following components in parts by mass: 85 parts of acrylate emulsion, 0.1 part of defoaming agent, 0.05 part of mildew preventive and 15 parts of water; wherein the defoaming agent is an organic silicon defoaming agent, and the mildew preventive is a Kathon bactericidal mildew preventive;
the powder material comprises the following components in parts by mass: 40 parts of cement, 0.1 part of ammonium oxalate powder, 60 parts of quartz powder and 0.1 part of water reducing agent; wherein the water reducing agent is a naphthalene water reducing agent;
the preparation method of this example is the same as example 1.
Comparative example 1
The difference between the comparative example and the example 3 is that no ammonium oxalate powder is added into the powder, and other components, the use amount and the preparation method are the same as those of the example 3.
Comparative example 2
The difference between the comparative example and the example 1 is that no ammonium oxalate powder is added into the powder, and the other components, the use amounts and the preparation method are the same as those of the example 1.
Comparative example 3
The difference between the comparative example and the example 1 is that 1 part of ammonium oxalate powder in the powder is replaced by 1 part of aluminum sulfate powder, and the other components, the amounts and the preparation method are the same as those in the example 1.
Test example
The performance of the polymer cement waterproof coatings of the examples and the comparative examples except the saltpetering resistance was tested according to the performance detection method in national standard 23445-2009 of Polymer cement waterproof coatings; according to a method for detecting the alkali efflorescence resistance in national standard JC/T1024-2007 of wall facing mortar, after the maintenance of a coating test piece is finished, an alkali efflorescence resistance test is carried out; the specific test results are shown in table 1.
TABLE 1
As can be seen from the test results of table 1: the detection items of the embodiments 1 to 3 according to the GB/T23445-2009 standard all meet the requirement of type II in the GB/T23445-2009 standard; examples 1 to 3 satisfy the requirements of GB/T23445-2009 Standard type II in physical and mechanical properties, and have excellent resistance to overbasing. Comparative examples 1 to 3 were inferior in the alkali-efflorescence resistance, and comparative examples 1 to 3 were inferior to examples in the test results of both tensile strength and elongation at break, and it can be seen that comparative examples are inferior to examples in both the alkali-efflorescence resistance and the physical mechanical properties.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A saltpetering resistant polymeric cement waterproofing coating comprising: liquid materials and powder materials;
the liquid material comprises the following components in parts by mass: 85-95 parts of polymer emulsion, 0.1-1 part of defoaming agent, 0.05-0.1 part of mildew preventive and 5-15 parts of water;
the powder material comprises the following components in parts by mass: 80-40 parts of cement, 0.1-1 part of ammonium oxalate powder, 20-60 parts of quartz powder and 0.1-1 part of water reducing agent;
the mass ratio of the liquid material to the powder material is 1: 1-2;
the preparation method of the waterproof coating comprises the following steps:
(1) vacuumizing the polymer emulsion, water, the defoaming agent and the mildew preventive, and then uniformly mixing to obtain the liquid material;
(2) firstly, uniformly mixing cement and quartz powder to obtain a mixed material; and then uniformly mixing the mixed material, ammonium oxalate powder and a water reducing agent to obtain the powder material.
2. The waterproof coating material according to claim 1, wherein the polymer emulsion is an acrylate emulsion.
3. The waterproof coating material according to claim 1, wherein the cement is portland cement.
4. The waterproof coating material according to claim 1, wherein the defoaming agent is at least one of a silicone defoaming agent, a polyether defoaming agent, a mineral oil defoaming agent, and a vegetable oil defoaming agent.
5. The waterproof coating material according to claim 1, wherein the water reducing agent is at least one of a polycarboxylic acid-based water reducing agent, a melamine-based water reducing agent, and a naphthalene-based water reducing agent.
6. The waterproof coating material according to claim 1, wherein in step (1), the mixing conditions are: firstly stirring for 15-30min at the stirring speed of 200-400r/min, and then stirring for 1-3min at the stirring speed of 100-180 r/min.
7. The waterproof coating material as claimed in claim 1, wherein in the step (2), the mixture is obtained by stirring at a stirring speed of 400-800r/min for 1-3 min; then stirring for 1-3min at the stirring speed of 400-800r/min to obtain the powder.
8. The method for preparing the waterproof coating material according to any one of claims 1 to 7, characterized by comprising:
(1) vacuumizing the polymer emulsion, water, the defoaming agent and the mildew preventive, and then uniformly mixing to obtain the liquid material;
(2) firstly, uniformly mixing cement and quartz powder to obtain a mixed material; and then uniformly mixing the mixed material, ammonium oxalate powder and a water reducing agent to obtain the powder material.
9. The production method according to claim 8, wherein in the step (1), the mixing conditions are: firstly stirring for 15-30min at the stirring speed of 200-400r/min, and then stirring for 1-3min at the stirring speed of 100-180 r/min.
10. The preparation method as claimed in claim 8, wherein in the step (2), the mixture is obtained by first stirring at a stirring speed of 400-800r/min for 1-3 min; then stirring for 1-3min at the stirring speed of 400-800r/min to obtain the powder.
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| CN112694773A (en) * | 2020-12-21 | 2021-04-23 | 杭州东方雨虹建筑材料有限公司 | Environment-friendly polymer cement waterproof coating with low construction coating rate and preparation method thereof |
| CN113636819A (en) * | 2021-09-02 | 2021-11-12 | 湖北三棵树新材料科技有限公司 | Early-stage efflorescence-resistant polymer cement waterproof mortar and preparation method thereof |
| CN113861792B (en) * | 2021-11-02 | 2022-03-22 | 科顺防水科技股份有限公司 | Temperature change resistant two-component water-based waterproof coating composition, temperature change resistant two-component water-based waterproof coating, and preparation method and application thereof |
| CN116144212B (en) * | 2022-12-29 | 2023-11-28 | 天津德普威涂料有限公司 | Exterior wall putty free of alkali-resistant primer coating and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104341134A (en) * | 2013-12-26 | 2015-02-11 | 美巢集团股份公司 | Polymer cement water-proof coating and preparation method thereof |
| CN206319529U (en) * | 2016-12-16 | 2017-07-11 | 安徽未来园林绿化有限公司 | A kind of anti-accumulation of salt in the surface soil structure of gardens facing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104341134A (en) * | 2013-12-26 | 2015-02-11 | 美巢集团股份公司 | Polymer cement water-proof coating and preparation method thereof |
| CN206319529U (en) * | 2016-12-16 | 2017-07-11 | 安徽未来园林绿化有限公司 | A kind of anti-accumulation of salt in the surface soil structure of gardens facing |
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