CN111574101A - Modified water repellent and preparation method thereof - Google Patents
Modified water repellent and preparation method thereof Download PDFInfo
- Publication number
- CN111574101A CN111574101A CN201910506913.3A CN201910506913A CN111574101A CN 111574101 A CN111574101 A CN 111574101A CN 201910506913 A CN201910506913 A CN 201910506913A CN 111574101 A CN111574101 A CN 111574101A
- Authority
- CN
- China
- Prior art keywords
- inorganic salt
- water repellent
- sodium hydroxide
- auxiliary agent
- silicic acid
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention relates to a modified water repellent which is mainly prepared from the following raw materials: sodium hydroxide, methyl silicic acid, inorganic salt, auxiliary agent and water; wherein the molar ratio of the sodium hydroxide, the methyl silicic acid and the inorganic salt is 2-3:1:1-1.5, and the mass percentage of the auxiliary agent in the total raw materials is 0.02-0.1%. The pH value of the invention is 6.5-7.5, the invention is neutral, safe and environment-friendly in construction, the invention can not make the surface of the base material return alkali, and the invention not only generates hydrophobic effect on the surface, but also generates hydrophobic effect in the interior, so the base material has permanent waterproofness and dustproof performance.
Description
Technical Field
The invention relates to the field of building materials, in particular to a modified water repellent and a preparation method thereof.
Background
The existing water repellent has the following problems: the general water repellent sodium methylsilicate aqueous solution is strong alkaline, and the product contains a large amount of sodium hydroxide, so that the damage accident is easily caused in the construction; after the general water repellent is used, white substances appear on the surface of a base material, which are called as alkali return and need to be washed by water to be removed; the common water repellent is only arranged on the surface of a product, and when the coating is used as a waterproof material on the surface of an outer wall, the coating is aged and falls off under the sun and rain, so that the waterproof effect is lost; the common water repellent has no dustproof function.
Disclosure of Invention
The invention provides a modified water repellent which can generate hydrophobic effect on the surface and the interior of a base material, and the product is neutral, safe and environment-friendly and does not return alkali.
The invention is realized by the following technical scheme:
a modified water repellent is mainly prepared from the following raw materials: sodium hydroxide, methyl silicic acid, inorganic salt, auxiliary agent and water;
wherein the molar ratio of the sodium hydroxide, the methyl silicic acid and the inorganic salt is 2-3:1:1-1.5, and the mass percentage of the auxiliary agent in the total raw materials is 0.02-0.1%.
The inorganic salt is any one of chloride or sulfate.
A preparation method of a modified water repellent is prepared by the following steps:
synthesis of sodium methyl silicate: firstly, dissolving sodium hydroxide in water, then adding methyl silicic acid and an auxiliary agent, fully reacting at the temperature of 90-150 ℃, and then filtering to remove impurities to obtain a clear solution;
② synthesizing methylsilicate: adding inorganic salt into the solution prepared in the step I, fully reacting to generate a white paste, and finishing the reaction when the pH value of the paste is between 6 and 8;
thirdly, drying: drying the paste obtained in the step II, grinding and packaging.
The principle of the invention is as follows:
the invention relates to a high-efficiency water repellent taking a mesomethylsilicic acid derivative as a main component, which is used in a base material to prevent liquid water on the surface of the base material from permeating, and can form a capillary structure with water repellent performance on the surface and in the base material, so that the liquid water forms water drops on the surface of the base material and falls off, and is difficult to permeate into the base material.
Compared with the prior art, the invention has the following beneficial effects: the pH value of the invention is 6.5-7.5, the invention is neutral, safe and environment-friendly in construction, the invention can not make the surface of the base material return alkali, and the invention not only generates hydrophobic effect on the surface, but also generates hydrophobic effect in the interior, so the base material has permanent waterproofness and dustproof performance.
Detailed Description
The present invention is further described below with reference to examples. It will be understood by those skilled in the art that the following examples are not intended to limit the scope of the present invention, and that any modifications and variations based on the present invention are within the scope of the present invention.
Example 1
A modified water repellent is mainly prepared from the following raw materials: sodium hydroxide, methyl silicic acid, inorganic salt, auxiliary agent and water;
wherein the molar ratio of the sodium hydroxide, the methyl silicic acid and the inorganic salt is 2:1:1, and the mass percentage of the auxiliary agent in the total raw materials is 0.02%.
The inorganic salt is any one of chloride or sulfate.
A preparation method of a modified water repellent is prepared by the following steps:
synthesis of sodium methyl silicate: firstly, dissolving sodium hydroxide in water, then adding methyl silicic acid and an auxiliary agent, fully reacting at the temperature of 90 ℃, and then filtering to remove impurities to obtain a clear solution;
② synthesizing methylsilicate: adding inorganic salt into the solution prepared in the step I, fully reacting to generate a white paste, and finishing the reaction when the pH value of the paste is between 6 and 8;
thirdly, drying: drying the paste obtained in the step II, grinding and packaging.
Example 2
A modified water repellent is mainly prepared from the following raw materials: sodium hydroxide, methyl silicic acid, inorganic salt, auxiliary agent and water;
wherein the molar ratio of the sodium hydroxide, the methyl silicic acid and the inorganic salt is 3:1:1, and the mass percentage of the auxiliary agent in the total raw materials is 0.1%.
The inorganic salt is any one of chloride or sulfate.
A preparation method of a modified water repellent is prepared by the following steps:
synthesis of sodium methyl silicate: firstly, dissolving sodium hydroxide in water, then adding methyl silicic acid and an auxiliary agent, fully reacting at the temperature of 150 ℃, and then filtering to remove impurities to obtain a clear solution;
② synthesizing methylsilicate: adding inorganic salt into the solution prepared in the step I, fully reacting to generate a white paste, and finishing the reaction when the pH value of the paste is between 6 and 8;
thirdly, drying: drying the paste obtained in the step II, grinding and packaging.
Example 3
A modified water repellent is mainly prepared from the following raw materials: sodium hydroxide, methyl silicic acid, inorganic salt, auxiliary agent and water;
wherein the molar ratio of the sodium hydroxide, the methyl silicic acid and the inorganic salt is 3:1:1.5, and the mass percentage of the auxiliary agent in the total raw materials is 0.06%.
The inorganic salt is any one of chloride or sulfate.
A preparation method of a modified water repellent is prepared by the following steps:
synthesis of sodium methyl silicate: firstly, dissolving sodium hydroxide in water, then adding methyl silicic acid and an auxiliary agent, fully reacting at the temperature of 100 ℃, and then filtering to remove impurities to obtain a clear solution;
② synthesizing methylsilicate: adding inorganic salt into the solution prepared in the step I, fully reacting to generate a white paste, and finishing the reaction when the pH value of the paste is between 6 and 8;
thirdly, drying: drying the paste obtained in the step II, grinding and packaging.
The adjuvant described in the above examples was a model a-306 defoamer from xingpo chemical building materials ltd, suzhou.
0.4 to 1 portion of modified water repellent prepared by the invention, 35 portions of white cement, 40 to 55 portions of quartz sand, 10 to 25 portions of heavy calcium carbonate, 0.6 to 1.5 portions of redispersible latex powder, 0.01 to 0.05 portion of starch ether, 0.06 to 0.15 portion of hydroxypropyl cellulose ether, 0.01 to 1.2 portions of inorganic pigment, 0.06 to 0.2 portion of surfactant, 0.02 to 0.15 portion of retarder, 0.5 to 3.0 portions of brightener and 0.4 to 1.0 portion of wood fiber are evenly mixed to form mortar. (the white cement adopts Jiangxi Yutu Cement Co., Ltd., P.W42.5 white silicate cement, the quartz sand adopts Putian quartz sand factory specification of 20-200 meshes, the heavy calcium carbonate adopts Fujian Zhangping 325 meshes, the redispersible latex powder adopts Shandongdang Kangkang, the modified water repellent adopts Tianshaqianba ZSJ-2 type, the starch ether adopts Fadakang, the hydroxypropyl cellulose ether adopts Fadakang viscosity of 10 ten thousand, the inorganic pigment adopts Deqing county Safan pigment, the surfactant adopts Suzhou Xingbang chemical building materials Co., Ltd., SMF-1013, the retarder adopts Beijing Qiheng lignocellulose technology development center TB1601, the brightener adopts Jiangsu Zhengzhen chemical Co., Ltd., ZR-940, and the wood fiber adopts Hebeibei Titan pure wood fiber in Chengcheng)
The mortar adopting the water repellent has the durability of more than 30 years, good waterproof and anti-permeability performance, lotus leaf-shaped water bead effect, good cracking resistance and self-repairing function, good mechanical performance, strength of more than 12MPa, capability of being formed in one step, construction cost and material cost per square meter of about 60-70 yuan, white or light gray powder in appearance, fineness of 300 plus 500 meshes and pH value of 6.5-7.5.
Claims (3)
1. A modified water repellent is characterized in that: the health-care food is mainly prepared from the following raw materials: sodium hydroxide, methyl silicic acid, inorganic salt, auxiliary agent and water;
wherein the molar ratio of the sodium hydroxide, the methyl silicic acid and the inorganic salt is 2-3:1:1-1.5, and the mass percentage of the auxiliary agent in the total raw materials is 0.02-0.1%.
2. The modified water repellent according to claim 1, characterized in that: the inorganic salt is any one of chloride or sulfate.
3. The preparation method of the modified water repellent according to claim 1 or 2, characterized in that: the preparation method comprises the following steps:
synthesis of sodium methyl silicate: firstly, dissolving sodium hydroxide in water, then adding methyl silicic acid and an auxiliary agent, fully reacting at the temperature of 90-150 ℃, and then filtering to remove impurities to obtain a clear solution;
② synthesizing methylsilicate: adding inorganic salt into the solution prepared in the step I, fully reacting to generate a white paste, and finishing the reaction when the pH value of the paste is between 6 and 8;
thirdly, drying: drying the paste obtained in the step II, grinding and packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910506913.3A CN111574101A (en) | 2019-06-12 | 2019-06-12 | Modified water repellent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910506913.3A CN111574101A (en) | 2019-06-12 | 2019-06-12 | Modified water repellent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111574101A true CN111574101A (en) | 2020-08-25 |
Family
ID=72125983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910506913.3A Pending CN111574101A (en) | 2019-06-12 | 2019-06-12 | Modified water repellent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111574101A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921288A (en) * | 2010-07-23 | 2010-12-22 | 朱光皓 | Pasty high-efficiency methyl silanol potassium sodium waterproof agent and preparation method thereof |
| CN103131322A (en) * | 2011-11-21 | 2013-06-05 | 胡翔 | Modified organosilicon waterproofing agent |
-
2019
- 2019-06-12 CN CN201910506913.3A patent/CN111574101A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921288A (en) * | 2010-07-23 | 2010-12-22 | 朱光皓 | Pasty high-efficiency methyl silanol potassium sodium waterproof agent and preparation method thereof |
| CN103131322A (en) * | 2011-11-21 | 2013-06-05 | 胡翔 | Modified organosilicon waterproofing agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103553708B (en) | Method for preparation of rapidly-solidified penetration-type protective agent for sea engineering concrete | |
| CN107619626B (en) | Water-based high-temperature-resistant high-humidity-resistant inorganic coating and preparation method thereof | |
| CN103497559B (en) | Weather resistant exterior wall putty powder | |
| CN104403401B (en) | A kind of Surface coating SiO2Modified coal ash and its production and use | |
| WO2009025354A1 (en) | Process for production of silane-modified cationized cellulose | |
| CN103382334B (en) | Alkyd modified acrylic acid emulsion paint with high weatherability | |
| CN104829161A (en) | Novel waterproof agent for building gypsum, and preparation method thereof | |
| CN101974261A (en) | Neutral water-resistance putty paste and preparation method thereof | |
| CN110526667A (en) | A kind of aqueous ecological inorganic coating and its preparation method and application | |
| CN102702398B (en) | Method for preparing polyvinyl butyral (PVB) resin | |
| CN109437753B (en) | Inorganic stone and production process thereof | |
| CN102351498A (en) | Modified sodium silicate waterproof thermal insulation slurry and preparation method thereof | |
| CN103924457B (en) | A kind of production technology of dyeing paste | |
| CN110272258B (en) | High-strength waterproof magnesium oxychloride cement and preparation method thereof | |
| CN104788058A (en) | Low-price environment-friendly dry-mixed expanded polyphenyl board bonding mortar | |
| CN111574101A (en) | Modified water repellent and preparation method thereof | |
| CN104559767A (en) | A preparing method of an organosilicon building waterproof agent | |
| CN103408575A (en) | Preparation method for propyl silicate waterproof agent | |
| CN103924456A (en) | Production process of reactive printing paste | |
| CN103642297A (en) | Polishing-free emulsion putty paste | |
| CN105016699A (en) | Composite modified nanometer anti-ultraviolet exterior wall panel and manufacturing method thereof | |
| CN105820641A (en) | Waterproof putty for building inner wall and preparation method thereof | |
| CN109266148A (en) | A kind of energy conservation and environmental protection building coating and preparation method thereof | |
| CN107602059A (en) | A kind of non-fading red facing mortar of environmental protection | |
| CN110344275A (en) | A kind of preparation method of dirt-and moisture household liquid wallpaper |
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 |