CN110655799A - Self-healing waterproof sealant capable of expanding in water - Google Patents
Self-healing waterproof sealant capable of expanding in water Download PDFInfo
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- CN110655799A CN110655799A CN201911036973.XA CN201911036973A CN110655799A CN 110655799 A CN110655799 A CN 110655799A CN 201911036973 A CN201911036973 A CN 201911036973A CN 110655799 A CN110655799 A CN 110655799A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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Abstract
The invention discloses a water-swelling self-healing waterproof sealant, which comprises 50-90% of high-viscosity high-elasticity modified emulsified asphalt and 10-50% of water-swelling self-healing waterproof filler in parts by weight, wherein the water-swelling self-healing waterproof filler consists of an expansion source core and a non-water-soluble coating for embedding the expansion source core, and the water-swelling self-healing waterproof filler comprises the following components in parts by weight: 100 parts of an expansion source, 1-5 parts of a long-chain alkyl compound and 8-30 parts of a coating agent; the high-elasticity modified emulsified asphalt and the water-swelling self-healing waterproof filler have good compatibility and are synergistically enhanced in waterproof performance, when the waterproof layer is damaged, the swelling self-healing waterproof filler in the waterproof material is exposed, swells when meeting water, fills cracks, pores and waterproof failure positions, compensates swelling force and elasticity, enables the waterproof structure to be pressed tightly again, and achieves the purpose of dual protection.
Description
Technical Field
The invention relates to a waterproof material, in particular to a self-healing waterproof sealant capable of expanding when meeting water.
Background
Building leakage is a prominent common quality problem of buildings, and more than 90% of building leakage is related to incorrect treatment of detail nodes. There are numerous places where the detail nodes of a building are waterproof, and there are often many types of materials at the detail nodes, such as cement members, aluminum members, plastic members, glass members, and the like, which are interlaced together. In actual construction materials, common waterproof coatings, ointments and other sealing materials are often adopted for filling, the materials are weak in cohesiveness or other physical properties, poor in sealing treatment, show swelling and shrinkage cracking in water soaking in a short term, show shelling, edge warping, brittle fracture and the like with a bonding surface in a long term, even if high-grade sealing pastes/adhesives (such as silicone, polysulfide, polyurethane and the like) are adopted, sometimes nodes leak, and the reason is that the nodes are related to the compatibility of the sealing materials and base materials besides the components of the sealing materials, and if the compatibility of the selected sealing pastes and the base materials is poor, the interfaces are easy to separate to form water seepage and water leakage channels after a long time.
Disclosure of Invention
In view of the above, the present invention provides a water-swelling self-healing waterproof sealant, in which a water-swelling self-healing waterproof filler is directly added to a high-viscosity high-elasticity modified emulsified asphalt without changing the original treatment process and construction process, and when a sealing layer of the sealant is damaged, the swelling self-healing waterproof filler in the waterproof material is exposed, swells in the presence of water, fills cracks, and compensates for swelling force, so that a waterproof structure is compressed and compacted again, thereby achieving the purpose of dual protection.
The water-swelling self-healing waterproof sealant disclosed by the invention comprises the following raw materials of 50-90% of high-viscosity high-elasticity modified emulsified asphalt and 10-50% of water-swelling self-healing waterproof filler in parts by weight, wherein the water-swelling self-healing waterproof filler comprises an expansion source core and a non-water-soluble coating for embedding the expansion source core, and the water-swelling self-healing waterproof filler comprises the following components in parts by weight: 100 parts of an expansion source, 1-5 parts of a long-chain alkyl compound and 8-30 parts of a coating agent, wherein the expansion source comprises bentonite and/or super absorbent resin;
further, the waterproof material raw material consists of 70 percent of high-viscosity high-elasticity modified emulsified asphalt and 30 percent of water-swelling self-healing waterproof filler according to the weight ratio;
further, the long-chain alkyl compound is an alkyl compound of C16-C18;
further, the long-chain alkyl compound is one or a mixture of more than two of stearic acid and salt compounds thereof, oleic acid and salt compounds thereof, stearamide, octadecylamine, octadecyl trimethyl ammonium chloride and hexadecyl dimethyl ammonium chloride;
further, the coating agent is one or a mixture of more than two of paraffin, chlorinated paraffin, solid asphalt, modified asphalt, rosin and modified rosin;
further, the bentonite and the super absorbent resin are both powder;
further, the waterproof filler comprises the following raw materials in parts by weight: 100 parts of an expansion source, 3 parts of a long-chain alkyl compound and 20 parts of a coating agent.
The invention has the beneficial effects that: according to the water-swelling self-healing waterproof sealant disclosed by the invention, the water-swelling self-healing waterproof filler is directly added into the flexible waterproof material without changing the original treatment process and construction process, the compatibility of the high-viscosity high-elasticity modified emulsified asphalt and the water-swelling self-healing waterproof filler is good, the waterproof performance is synergistically enhanced, when the waterproof layer is damaged, the swelling self-healing waterproof filler in the waterproof material is exposed, expands when meeting water, fills cracks, pores and waterproof failure positions, and compensates for swelling force and elasticity, so that the waterproof structure is pressed and compacted again, the aim of double protection is fulfilled, and the waterproof strength and the durability of the waterproof are enhanced. The adopted expansion self-healing waterproof filler takes bentonite powder and super-absorbent resin powder as expansion sources, forms independent waterproof powder filler after being embedded by the coating agent, can be filled in flexible waterproof materials without changing the construction process of the flexible waterproof materials, cannot influence the original performance of the materials after being added, and has simple raw materials and strong universality.
Detailed Description
The waterproof sealing paste capable of self-healing through water swelling of the embodiment is characterized in that the waterproof material raw material consists of 50-90% of high-viscosity high-elasticity modified emulsified asphalt and 10-50% of waterproof filler capable of self-healing through water swelling in a weight ratio, the waterproof filler capable of self-healing through water swelling consists of an expansion source inner core and a water-insoluble coating embedded with the expansion source inner core, and the waterproof filler capable of self-healing through water swelling in a weight ratio comprises the following components: 100 parts of an expansion source, 1-5 parts of a long-chain alkyl compound and 8-30 parts of a coating agent, wherein the expansion source comprises bentonite and/or super absorbent resin; the water-swelling self-healing waterproof filler is of a membrane core structure, the swelling source bentonite core super-absorbent resin is used as a core, and the water-swelling self-healing waterproof filler is added into the flexible waterproof material through embedding treatment, so that the performance and the treatment process of the flexible waterproof material cannot be influenced. The self-healing waterproof sealant capable of expanding when meeting water can be prepared by mixing and grinding the raw materials, and the process is simple.
Preparing high-viscosity high-elasticity modified emulsified asphalt: heating the substrate asphalt to 175-.
The performance indexes of the high-viscosity high-elasticity modified emulsified asphalt are as follows:
| item | Test value |
| Penetration/(10)-1mm) | 48 |
| Degree of softening (R)&B)/℃ | 94.1 |
| Ductility (5 ℃) per cm | 28 |
| Dynamic viscosity at 60 degree/(Pa.s) | 141530 |
| Dynamic viscosity at 135 degree/(Pa.s) | 3.5 |
| Elastic recovery of% | 99 |
In this embodiment, the long-chain alkyl compound is one or a mixture of two or more of stearic acid and a salt compound thereof, oleic acid and a salt compound thereof, stearamide, octadecylamine, octadecyltrimethyl ammonium chloride, and hexadecyl dimethyl ammonium chloride.
In this embodiment, the coating agent is one or a mixture of two or more of paraffin, chlorinated paraffin, solid asphalt, modified asphalt, rosin and modified rosin; the coating agent is insoluble in water, is solid powder or paste at room temperature, and has a melting temperature lower than 130 ℃.
In this embodiment, the bentonite and the super absorbent resin are both powders;
in this embodiment, the self-healing waterproof sealant swelling with water is prepared by mixing bentonite, super water absorbent resin and coating agent and grinding. The grinding mode is sand grinding, ball milling, roller milling and the like;
in the embodiment, the waterproof filler comprises the following raw materials in parts by weight: 100 parts of an expansion source, 3 parts of a long-chain alkyl compound and 20 parts of a coating agent. Is a preferred embodiment.
Example one
The waterproof material raw material of the water-swelling self-healing waterproof sealant of the embodiment is composed of 50% of high-viscosity high-elasticity modified emulsified asphalt and 50% of water-swelling self-healing waterproof filler in percentage by weight; the self-healing waterproof filler capable of swelling in water comprises the following raw materials in parts by weight: 100 parts of bentonite, 1 part of long-chain alkyl compound and 8 parts of coating agent.
In this embodiment, the long-chain alkyl compound is stearic acid, and the purpose of the present invention can be achieved by replacing stearic acid with one of a salt compound of stearic acid, oleic acid and a salt compound thereof, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, or replacing stearic acid with a salt compound of stearic acid, oleic acid and a salt compound thereof, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride in parts by weight.
In this embodiment, the coating agent is paraffin, and in this embodiment, the paraffin is replaced by one of chlorinated paraffin, solid asphalt, modified asphalt, rosin, and modified rosin in parts by weight, or the paraffin is replaced by a mixture of chlorinated paraffin, solid asphalt, modified asphalt, rosin, and modified rosin in parts by weight, so as to obtain a qualified product.
Example two
In the water-swelling self-healing waterproof sealant according to the embodiment of the present invention, the waterproof material raw material is composed of 90% by weight of high-viscosity high-elasticity modified emulsified asphalt and 10% by weight of water-swelling self-healing waterproof filler; the water-swellable self-healing waterproof filler comprises the following raw materials in parts by weight: 100 parts of super absorbent resin, 5 parts of long-chain alkyl compound and 30 parts of coating agent.
In this embodiment, the long-chain alkyl compound is a salt compound of stearic acid, and the stearic acid is replaced by one of stearic acid, oleic acid and a salt compound thereof, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, or replaced by a mixture of a salt compound of stearic acid and stearic acid, oleic acid and a salt compound thereof, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, so as to achieve the object of the present invention.
In this embodiment, the coating agent is chlorinated paraffin, and in this embodiment, the chlorinated paraffin is replaced by one of paraffin, solid asphalt, modified asphalt, rosin, and modified rosin in parts by weight, or the chlorinated paraffin is replaced by a mixture of paraffin, solid asphalt, modified asphalt, rosin, and modified rosin in parts by weight, so that qualified products are obtained.
EXAMPLE III
In the water-swelling self-healing waterproof sealant according to the embodiment of the present invention, the waterproof material raw material is composed of 55% by weight of high-viscosity high-elasticity modified emulsified asphalt and 45% by weight of water-swelling self-healing waterproof filler; the water-swellable self-healing waterproof filler comprises the following raw materials in parts by weight: 100 parts of bentonite, 1 part of long-chain alkyl compound and 30 parts of coating agent.
In this embodiment, the long-chain alkyl compound is oleic acid, and the object of the present invention can be achieved by replacing oleic acid with one of stearic acid, a salt compound of oleic acid, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, or replacing oleic acid with a mixture of stearic acid, a salt compound thereof, a salt compound of oleic acid, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride.
In this embodiment, the coating agent is solid asphalt, and in this embodiment, the solid asphalt is replaced by one of chlorinated paraffin, modified asphalt, rosin, and modified rosin in parts by weight, or the solid asphalt is replaced by a mixture of chlorinated paraffin, modified asphalt, rosin, and modified rosin in parts by weight, so that qualified products are obtained.
Example four
In the water-swelling self-healing waterproof sealant according to the embodiment of the present invention, the waterproof material raw material is composed of, by weight, 80% of high-viscosity high-elasticity modified emulsified asphalt and 20% of water-swelling self-healing waterproof filler; the water-swellable self-healing waterproof filler comprises the following raw materials in parts by weight: 20 parts of bentonite, 80 parts of super absorbent resin, 5 parts of long-chain alkyl compound and 8 parts of coating agent.
In this embodiment, the long-chain alkyl compound is a salt compound of oleic acid, and the salt compound of oleic acid is replaced by one of a salt compound of stearic acid, oleic acid, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, or replaced by a mixture of a salt compound of oleic acid and a salt compound of stearic acid, oleic acid, stearamide, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, so as to achieve the object of the present invention.
In this embodiment, the coating agent is modified asphalt, and in this embodiment, the modified asphalt is replaced by one of chlorinated paraffin, solid asphalt, paraffin, rosin and modified rosin in parts by weight, or the modified asphalt is replaced by a mixture of chlorinated paraffin, solid asphalt, paraffin, rosin and modified rosin in parts by weight, so that qualified products are obtained.
EXAMPLE five
In the water-swelling self-healing waterproof sealant according to the embodiment of the present invention, the waterproof material raw material is composed of, by weight, 85% of high-viscosity high-elasticity modified emulsified asphalt and 15% of water-swelling self-healing waterproof filler; the water-swellable self-healing waterproof filler comprises the following raw materials in parts by weight: 30 parts of bentonite, 70 parts of super absorbent resin, 2 parts of long-chain alkyl compound and 15 parts of coating agent.
In this embodiment, the long-chain alkyl compound is stearamide, and the stearamide is replaced by one of stearic acid, a salt compound of stearic acid, oleic acid and a salt compound thereof, stearic acid, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, or replaced by a mixture of a salt compound of stearamide and stearic acid, oleic acid and a salt compound thereof, octadecylamine, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, by weight, the purpose of the present invention can be achieved.
In this embodiment, the coating agent is rosin, and in this embodiment, the rosin is replaced by one of chlorinated paraffin, solid asphalt, modified asphalt, paraffin, and modified rosin in parts by weight, or replaced by a mixture of chlorinated paraffin, solid asphalt, modified asphalt, paraffin, and modified rosin in parts by weight, so as to obtain a qualified product.
EXAMPLE six
In the water-swelling self-healing waterproof sealant according to the embodiment of the present invention, the waterproof material raw material is composed of, by weight, 70% of high-viscosity high-elasticity modified emulsified asphalt and 30% of water-swelling self-healing waterproof filler; the water-swellable self-healing waterproof filler comprises the following raw materials in parts by weight: the waterproof filler comprises the following raw materials in parts by weight: 50 parts of bentonite, 50 parts of super absorbent resin, 3 parts of long-chain alkyl compound and 20 parts of coating agent.
In this embodiment, the long-chain alkyl compound is octadecylamine, and the long-chain alkyl compound is replaced by one of stearic acid, a salt compound of stearic acid, oleic acid and a salt compound thereof, stearamide, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, or replaced by a mixture of a salt compound of octadecylamine and stearic acid, oleic acid and a salt compound thereof, stearamide, stearic acid, octadecyltrimethylammonium chloride, and hexadecyldimethylammonium chloride, according to parts by weight, so as to achieve the purpose of the present invention.
In this embodiment, the coating agent is modified rosin, and in this embodiment, the modified rosin is replaced by one of chlorinated paraffin, solid asphalt, modified asphalt, rosin and paraffin in parts by weight, or the modified rosin is replaced by a mixture of chlorinated paraffin, solid asphalt, modified asphalt, rosin and paraffin in parts by weight, so that qualified products are obtained.
In the above embodiment, the bentonite and the super absorbent resin are both powders; the bentonite, the super water-absorbent resin and the coating agent are mixed and ground to prepare the self-healing waterproof sealant which can expand when meeting water. The super absorbent resin is super absorbent resin.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides a meet water inflation self-healing waterproof sealant which characterized in that: the waterproof material raw materials are composed of 50-90% of high-viscosity high-elasticity modified emulsified asphalt and 10-50% of water-swelling self-healing waterproof filler according to the weight ratio, the water-swelling self-healing waterproof filler is composed of water-insoluble envelopes of an expansion source core and an embedding expansion source core, and the water-swelling self-healing waterproof filler is prepared from the following raw materials in parts by weight: 100 parts of an expansion source, 1-5 parts of a long-chain alkyl compound and 8-30 parts of a coating agent, wherein the expansion source comprises bentonite and/or super absorbent resin.
2. The water-swellable self-healing waterproof sealant according to claim 1, characterized in that: the waterproof material is prepared from 70% of high-viscosity high-elasticity modified emulsified asphalt and 30% of water-swelling self-healing waterproof filler by weight.
3. The water-swellable self-healing waterproof sealant according to claim 2, characterized in that: the long-chain alkyl compound is an alkyl compound of C16-C18.
4. The water-swellable self-healing waterproof sealant according to claim 3, characterized in that: the long-chain alkyl compound is one or a mixture of more than two of stearic acid and salt compounds thereof, oleic acid and salt compounds thereof, stearamide, octadecylamine, octadecyl trimethyl ammonium chloride and hexadecyl dimethyl ammonium chloride.
5. The water-swellable self-healing waterproof sealant according to claim 4, characterized in that: the coating agent is one or a mixture of more than two of paraffin, chlorinated paraffin, solid asphalt, modified asphalt, rosin and modified rosin.
6. The water-swellable self-healing waterproof sealant according to claim 5, characterized in that: the bentonite and the super absorbent resin are both powder.
7. The water-swellable self-healing waterproof sealant according to claim 1, characterized in that: the water-swellable self-healing waterproof filler comprises the following raw materials in parts by weight: 100 parts of an expansion source, 3 parts of a long-chain alkyl compound and 20 parts of a coating agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911036973.XA CN110655799A (en) | 2019-10-29 | 2019-10-29 | Self-healing waterproof sealant capable of expanding in water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911036973.XA CN110655799A (en) | 2019-10-29 | 2019-10-29 | Self-healing waterproof sealant capable of expanding in water |
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Cited By (1)
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| CN111393075A (en) * | 2020-03-25 | 2020-07-10 | 广州市北二环交通科技有限公司 | High-viscosity modified asphalt mixture and application thereof |
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