CN116103001A - Slowly-bonding adhesive for steel strand - Google Patents
Slowly-bonding adhesive for steel strand Download PDFInfo
- Publication number
- CN116103001A CN116103001A CN202310202113.9A CN202310202113A CN116103001A CN 116103001 A CN116103001 A CN 116103001A CN 202310202113 A CN202310202113 A CN 202310202113A CN 116103001 A CN116103001 A CN 116103001A
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- CN
- China
- Prior art keywords
- parts
- slow
- bonding adhesive
- reactive diluent
- bonding
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a slow-bonding adhesive for steel strands, which relates to the technical field of adhesives, and comprises the following components in parts by weight: 80-120 parts of bisphenol A type epoxy resin, 0.5-30 parts of composite curing agent, 3-60 parts of reactive diluent, 1-20 parts of non-reactive diluent and 80-220 parts of inorganic filler. The adhesive has stable product property and pH value of 7-8, can play a good role in protecting the steel strand and prolonging the service life of the slow-bonding steel strand, can adapt to various severe environments, has excellent bonding performance, low cost, high strength after curing and excellent durability, is suitable for the concrete hydration heat temperature of 80 ℃, and solves the problem that the slow-bonding agent in the prior art is difficult to control the pH value by using alkaline curing agents, alkaline fillers such as cement, calcium carbonate and the like.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a slow-bonding adhesive for steel strands.
Background
At present, the slow-bonding prestressed steel strand has a force transmission mechanism for bonding the prestressed steel strand after the late slow-bonding agent is solidified due to the special advantages of simple and easy construction similar to the unbonded prestressed steel strand in the initial stage, has good bonding performance, firmly bonds the prestressed steel strand and structural concrete together to form a bonded prestressed structure, and is gradually widely applied to the design of a large-span structure. The most critical technique is the preparation of slow-binding agents.
According to the metal corrosion theory, the prestress steel strand in a stress state is easy to rust in a weak acid environment, so that the steel strand can be properly protected in a weak alkaline environment, but after the PH value exceeds 8, the steel strand is easy to electrochemically corrode in a higher alkaline environment, and the service life of the slow bonding steel strand is influenced. Thus, the pH of the slow-setting adhesive should suitably be in the range of 7-8.
However, the conventional slow-setting adhesives use alkaline curing agents and alkaline fillers such as cement and calcium carbonate, and it is difficult to control the PH of the adhesives to meet the requirements. Accordingly, a slowly-bonding adhesive for steel strands is provided by those skilled in the art to solve the problems set forth in the background art.
Disclosure of Invention
The invention aims to provide a slow-adhesion adhesive for a steel strand, which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the slow-bonding adhesive for the steel strand comprises the following components in parts by weight: 80-120 parts of bisphenol A type epoxy resin, 0.5-30 parts of composite curing agent, 3-60 parts of reactive diluent, 1-20 parts of non-reactive diluent and 80-220 parts of inorganic filler.
As a further scheme of the invention: the adhesive comprises the following components in parts by weight: 100 parts of bisphenol A type epoxy resin, 27 parts of composite curing agent, 60 parts of reactive diluent, 20 parts of non-reactive diluent and 200 parts of inorganic filler.
As still further aspects of the invention: the adhesive comprises the following components in parts by weight: 100 parts of bisphenol A type epoxy resin, 0.7 part of composite curing agent, 10 parts of reactive diluent, 1 part of non-reactive diluent and 100 parts of inorganic filler.
As still further aspects of the invention: the epoxy equivalent of the bisphenol A type epoxy resin is between 180 and 210 grams/equivalent.
As still further aspects of the invention: the composite curing agent is a mixture of low molecular polyamide resin and phthalic anhydride.
As still further aspects of the invention: the adding ratio of the low molecular polyamide resin to the phthalic anhydride in the composite curing agent is 4-5:1.
As still further aspects of the invention: the molecular weight of the low molecular polyamide resin is 650-800.
As still further aspects of the invention: the reactive diluent is ethylene glycol diglycidyl ether.
As still further aspects of the invention: the non-reactive diluent is dibutyl phthalate.
The diluent is added into the retarding adhesive to reduce the viscosity of the mixture, so that the inorganic filler is convenient to add to reduce the consumption of epoxy resin, reduce the cost and simultaneously control the initial viscosity through proportion to facilitate the implementation of the manufacturing process of the retarding adhesive steel strand.
As still further aspects of the invention: the inorganic filler is silica fume modified by a silane coupling agent, and one end of the coupling agent molecule can react with the surface of the silica fume, so that the hydrophilicity is changed into lipophilicity to form a high-strength chemical bond, and the other end of the coupling agent molecule is physically entangled with the adhesive polymer molecule to improve the compatibility with a polymer matrix, so that two materials with different properties are firmly combined, and the compression resistance, the fracture resistance and the tensile shear strength of the slow-bonding adhesive are improved.
Compared with the prior art, the invention has the beneficial effects that: the invention discloses a slow-bonding adhesive for steel strands, which has stable product property, pH value of 7-8, can well protect the steel strands, prolongs the service life of the slow-bonding steel strands, can adapt to various severe environments, has excellent bonding performance, low cost, high strength after curing and excellent durability, and is suitable for concrete hydration heat temperature of 80 ℃.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In an embodiment of the present invention,
wherein 1 part is 1kg.
Example 1
100kg of bisphenol A type epoxy resin, 22kg of low molecular polyamide resin, 5kg of phthalic anhydride, 60kg of active diluent, 20kg of non-active diluent and 200kg of inorganic filler are uniformly stirred into a viscous liquid, and then the viscous liquid is added into special equipment for grinding and degassing to obtain the slow bonding adhesive for the slow bonding steel strand, wherein the PH value of the slow bonding adhesive is measured to be 7.8.
Example 2
100kg of bisphenol A type epoxy resin, 10kg of low molecular polyamide resin, 2kg of phthalic anhydride, 20kg of active diluent, 4kg of non-active diluent and 160kg of inorganic filler are uniformly stirred into a viscous liquid, and then the viscous liquid is added into special equipment for grinding and degassing to obtain the slow bonding adhesive for the slow bonding steel strand, wherein the PH value of the slow bonding adhesive is measured to be 8.0.
Example 3
100kg of bisphenol A type epoxy resin, 4kg of low molecular polyamide resin, 1kg of phthalic anhydride, 10kg of active diluent, 1.5kg of inactive diluent and 140kg of inorganic filler are uniformly stirred into a viscous liquid, and then the viscous liquid is added into special equipment for grinding and degassing to obtain the slow bonding adhesive for the slow bonding steel strand, wherein the PH value of the slow bonding adhesive is measured to be 7.3.
Example 4
100kg of bisphenol A type epoxy resin, 1kg of low molecular polyamide resin, 0.2kg of phthalic anhydride, 3kg of active diluent, 1kg of inactive diluent and 100kg of inorganic filler are uniformly stirred into a viscous liquid, and then the viscous liquid is added into special equipment for grinding and degassing to obtain the slow bonding adhesive for the slow bonding steel strand, wherein the PH value of the slow bonding adhesive is measured to be 7.6.
Example 5
100kg of bisphenol A type epoxy resin, 0.6kg of low molecular polyamide resin, 0.1kg of phthalic anhydride, 10kg of active diluent, 1kg of inactive diluent and 100kg of inorganic filler are uniformly stirred into a viscous liquid, and then the viscous liquid is added into special equipment for grinding and degassing to obtain the slow bonding adhesive for the slow bonding steel strand, wherein the PH value of the slow bonding adhesive is measured to be 7.7.
In conclusion, the adhesive product of the invention has stable property and pH value of 7-8, can play a good role in protecting the steel strand and prolonging the service life of the slow-bonding steel strand, and simultaneously can adapt to various severe environments, has excellent bonding performance, low cost, high strength after curing and excellent durability, is suitable for the concrete hydration heat temperature of 80 ℃, and solves the problem that the slow-bonding agent in the prior art is difficult to control the pH value by using alkaline curing agents, cement, calcium carbonate and other alkaline fillers.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A slow-bonding adhesive for a steel strand is characterized in that: the adhesive comprises the following components in parts by weight: 80-120 parts of bisphenol A type epoxy resin, 0.5-30 parts of composite curing agent, 3-60 parts of reactive diluent, 1-20 parts of non-reactive diluent and 80-220 parts of inorganic filler.
2. The slow-bonding adhesive for steel strands according to claim 1, wherein: the adhesive comprises the following components in parts by weight: 100 parts of bisphenol A type epoxy resin, 27 parts of composite curing agent, 60 parts of reactive diluent, 20 parts of non-reactive diluent and 200 parts of inorganic filler.
3. The slow-bonding adhesive for steel strands according to claim 1, wherein: the adhesive comprises the following components in parts by weight: 100 parts of bisphenol A type epoxy resin, 0.7 part of composite curing agent, 10 parts of reactive diluent, 1 part of non-reactive diluent and 100 parts of inorganic filler.
4. The slow-bonding adhesive for steel strands according to claim 1, wherein: the epoxy equivalent of the bisphenol A type epoxy resin is between 180 and 210 grams/equivalent.
5. The slow-bonding adhesive for steel strands according to claim 1, wherein: the composite curing agent is a mixture of low molecular polyamide resin and phthalic anhydride.
6. The slow-bonding adhesive for steel strands according to claim 5, wherein: the adding ratio of the low molecular polyamide resin to the phthalic anhydride in the composite curing agent is 4-5:1.
7. The slow-bonding adhesive for steel strands according to claim 5, wherein: the molecular weight of the low molecular polyamide resin is 650-800.
8. The slow-bonding adhesive for steel strands according to claim 1, wherein: the reactive diluent is ethylene glycol diglycidyl ether.
9. The slow-bonding adhesive for steel strands according to claim 1, wherein: the non-reactive diluent is dibutyl phthalate.
10. The slow-bonding adhesive for steel strands according to claim 1, wherein: the inorganic filler is silica fume modified by a silane coupling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310202113.9A CN116103001A (en) | 2023-03-06 | 2023-03-06 | Slowly-bonding adhesive for steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310202113.9A CN116103001A (en) | 2023-03-06 | 2023-03-06 | Slowly-bonding adhesive for steel strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116103001A true CN116103001A (en) | 2023-05-12 |
Family
ID=86261668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310202113.9A Pending CN116103001A (en) | 2023-03-06 | 2023-03-06 | Slowly-bonding adhesive for steel strand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116103001A (en) |
-
2023
- 2023-03-06 CN CN202310202113.9A patent/CN116103001A/en active Pending
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