CN110903796A - High-toughness bridge reinforcing structure adhesive - Google Patents
High-toughness bridge reinforcing structure adhesive Download PDFInfo
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- CN110903796A CN110903796A CN201911254509.8A CN201911254509A CN110903796A CN 110903796 A CN110903796 A CN 110903796A CN 201911254509 A CN201911254509 A CN 201911254509A CN 110903796 A CN110903796 A CN 110903796A
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- component
- structural adhesive
- modified siloxane
- polyether modified
- filler
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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
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Abstract
The invention provides a high-toughness bridge reinforcing structural adhesive which is prepared by modulating a component A and a component B, wherein the component A comprises epoxy resin, polyether modified siloxane and filler, and the structure of the polyether modified siloxane is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R and m are 10-50, the polyether modified siloxane can obviously improve the toughness of the structural adhesive and greatly improve the bending strength and the tensile strength of a joint, R is an epoxy-terminated allyl polyether group, and the structure of R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a is 10-50, b is 10-40, polyether modified siloxane is taken as a surfactant and has defoaming effect; the B component comprises curingThe agent, the filler and the curing accelerator are added into the component B, and a small amount of toner is added, so that the color of the component B can not be changed in the long-term use process, and the appearance of the bridge is not influenced; the structural adhesive is simple in composition, easy in obtaining of raw materials and convenient to allocate, components of each component can be properly adjusted according to needs to meet different requirements, the structural adhesive can be used for sealing between box girder surfaces in a preset section matching method, and is suitable for popularization.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a high-toughness bridge reinforcing structure adhesive.
Background
In recent years, with the rapid development of highway traffic in China, a preset segment matching method has been widely adopted in bridge construction, and has the advantages of high construction quality, short construction period, small influence on traffic and the like. Since the box girder is prefabricated in a factory, the concrete shrinkage and creep of the box girder are small and the line shape change of the girder body is small after completion, which promotes the popularization of the preset segment matching method.
When adjacent section matching construction, need paint epoxy structure glue on the case roof beam face, paint the sealed of the purpose that the structure glued in guaranteeing to prefabricate between the case roof beam, prevent the seepage, prevent corrosion such as steam to steel strand wires, in addition, the structure is glued still to have certain toughness, prevents brittle fracture, influences the leakproofness.
In the existing structural adhesive used in bridge construction, in order to improve the toughness, a rubber toughening agent is generally required to be added, and the toughening agent can influence the viscosity of the structural adhesive, so that the service life of the structural adhesive is influenced, and the sealing performance of the structural adhesive is adversely affected; in addition, because the structural adhesive is generally prepared by mixing two components, in the preparation process, in order to avoid generating foam, a defoaming agent is also required to be added, so that the foam is prevented from being brought into the cured structural adhesive to influence the mechanical property of the structural adhesive.
Disclosure of Invention
In order to solve the above problems, the present invention provides the following technical solutions:
the high-toughness bridge reinforcing structure adhesive is prepared by modulating a component A and a component B, wherein the component A comprises epoxy resin, polyether modified siloxane and filler, and the structure of the polyether modified siloxane is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, m ═ 10-50, where R is a polyether group; the component B comprises a curing agent, a filler and a curing accelerator.
Further, R in the polyether modified siloxane is an epoxy-terminated allyl polyether group with a structure of-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a is 10-50 and b is 10-40.
Further, the component A comprises 80-90 parts of epoxy resin, 13-20 parts of polyether modified siloxane and 150 parts of filler; the component B comprises 50-60 parts of curing agent, 100-150 parts of filler and 1-3 parts of curing accelerator.
Further, the component B also comprises 3-5 parts of toner.
Further, the toner is selected from at least one of carbon black or iron black.
Further, the filler is selected from at least one of silica powder, talcum powder, barite powder and calcium carbonate.
Further, the weight ratio of the component A to the component B is 3:1-1: 1.
The invention has the beneficial effects that: the structural adhesive prepared from a component A and a component B, wherein the component A contains polyether modified siloxane, and the structure of the polyether modified siloxane is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2The polysiloxane chain segment in the R can obviously improve the toughness of the structural adhesive, greatly improve the bending strength and the tensile strength of a joint, increase the toughness of the structural adhesive along with the increase of the value m, increase the viscosity of the structural adhesive simultaneously, and take the value of m as 0-50, so that the toughness of the structural adhesive is ensured, the flowability of the structural adhesive is ensured, and the construction is facilitated;
in the polyether modified siloxane, R is an epoxy-terminated allyl polyether group, and the structure of R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a is 10-50, b is 10-40, R contains a polyether segment, which provides good hydrophilicity, and a polysiloxane segment contained in the polyether-modified siloxane has hydrophobicity and lyophobicity, which provides low surface tension, and the polyether-modified siloxane has a surfactantThe function of the defoaming agent can be achieved;
therefore, the polyether modified siloxane contained in the component A not only increases the toughness of the structural adhesive, but also plays a role of a surfactant, eliminates foam generated in the preparation process, and does not need to add a defoaming agent;
in addition, a small amount of toner is added into the component B, so that the color of the component B can not be changed in the long-term use process, and the appearance of a bridge is not influenced; according to engineering requirements, the content of each component in the component A and the component B and the proportion of the component A and the component B can be adjusted to modulate structural adhesives with different mechanical properties so as to achieve different purposes;
in conclusion, the structural adhesive is simple in composition, the raw materials are easy to obtain and convenient to prepare, the polyether modified siloxane can also play a defoaming role of a surfactant in the structural adhesive forming process, the formed polyether modified siloxane plays a role in improving the toughness of the structural adhesive through crosslinking with epoxy resin, and multiple purposes are achieved; meanwhile, a small amount of toner is added into the structural adhesive, so that the structural adhesive can be prevented from changing color in a long-term use process to avoid influencing the appearance of a bridge, and components of each component can be properly adjusted according to requirements to meet different requirements.
Drawings
FIG. 1 is a schematic molecular structure diagram of polyether modified siloxane.
Detailed Description
In order to make the technical means, features and functions of the present invention easier to understand, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the detailed description and the accompanying drawings in 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 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.
In the embodiment of the invention, the component A is uniformly dispersed by a high-speed dispersion machine, the component B is added into the component A according to the proportion of ingredients, and the components are dispersed until the colloid is uniform and fine, and then the components are stirred and defoamed in vacuum;
and (3) preparing a tensile test piece and a bending test piece, pouring the tensile test piece and the bending test piece into corresponding moulds according to the size in GB 2567-2008, maintaining for 7 days at room temperature, then removing the moulds, and immediately detecting the tensile strength and the bending strength.
Example 1
Table 1 shows the contents of components a and B in the high toughness bridge reinforcing structure adhesive of example 1:
TABLE 1
In this example, the polyether modified siloxane in component A is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, wherein m is 10 and R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a ═ 10, b ═ 10;
in the example, the proportioning ratio of the component A to the component B is 1:1, the component B is added into the component A according to the proportioning ratio, the mixture is dispersed until colloid is uniform and fine, then the mixture is stirred and defoamed in vacuum, the mixture is poured into a corresponding mold according to the size in GB 2567-2008, the mold is removed after curing for 7 days at room temperature, and the tensile strength and the bending strength are immediately detected.
Example 2
Table 2 shows the contents of components a and B in the high toughness bridge reinforcing structure adhesive of example 2:
TABLE 2
In this example, the polyether modified siloxane in component A is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, wherein m is 50 and R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a-50, b-40;
in the example, the proportioning ratio of the component A to the component B is 3:1, the component B is added into the component A according to the proportioning ratio, the mixture is dispersed until colloid is uniform and fine, then the mixture is stirred and defoamed in vacuum, the mixture is poured into a corresponding mold according to the size in GB 2567-2008, the mold is removed after curing for 7 days at room temperature, and the tensile strength and the bending strength are immediately detected.
Example 3
Table 3 shows the contents of components a and B in the high toughness bridge reinforcing structure adhesive of example 3:
TABLE 3
In this example, the polyether modified siloxane in component A is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, wherein m is 20 and R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a is 10, b is 20;
in the example, the proportioning ratio of the component A to the component B is 2:1, the component B is added into the component A according to the proportioning ratio, the mixture is dispersed until colloid is uniform and fine, then the mixture is stirred and defoamed in vacuum, the mixture is poured into a corresponding mold according to the size in GB 2567-2008, the mold is removed after curing for 7 days at room temperature, and the tensile strength and the bending strength are immediately detected.
Example 4
Table 4 shows the contents of components a and B in the high toughness bridge reinforcing structure adhesive of example 4:
TABLE 4
In this example, the polyether modified siloxane in component A is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, wherein m is 20 and R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a-20, b-10;
in the example, the proportioning ratio of the component A to the component B is 2:1, the component B is added into the component A according to the proportioning ratio, the mixture is dispersed until colloid is uniform and fine, then the mixture is stirred and defoamed in vacuum, the mixture is poured into a corresponding mold according to the size in GB 2567-2008, the mold is removed after curing for 7 days at room temperature, and the tensile strength and the bending strength are immediately detected.
Example 5
Table 5 shows the contents of components a and B in the high toughness bridge reinforcing structure adhesive of example 5:
TABLE 5
In this example, the polyether modified siloxane in component A is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, wherein m is 30 and R is-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a-20, b-20;
in the example, the proportioning ratio of the component A to the component B is 2:1, the component B is added into the component A according to the proportioning ratio, the mixture is dispersed until colloid is uniform and fine, then the mixture is stirred and defoamed in vacuum, the mixture is poured into a corresponding mold according to the size in GB 2567-2008, the mold is removed after curing for 7 days at room temperature, and the tensile strength and the bending strength are immediately detected.
The data of the tensile strength and the bending strength of the casting after the high-toughness bridge reinforcing structure adhesive is subjected to mold curing in the examples 1 to 5 are compared with the standard values corresponding to the A-type structure adhesive, and the results are shown in the following table 6:
TABLE 6
Through analysis, the high-toughness bridge reinforcing structural adhesive in the embodiment 1 to the embodiment 5 all reaches the standard of the A-type structural adhesive, and the performance is greatly improved compared with the A-type structural adhesive.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification or equivalent substitution made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The high-toughness bridge reinforcing structure adhesive is prepared by modulating a component A and a component B, and is characterized in that the component A comprises epoxy resin, polyether modified siloxane and filler, and the structure of the polyether modified siloxane is RSi (CH)3)2(OSi(CH3)2)mOSi(CH3)2R, m ═ 10-50, where R is a polyether group; the component B comprises a curing agent, a filler and a curing accelerator.
2. The high toughness bridge reinforcing structural adhesive of claim 1, wherein R in said polyether modified siloxane is an epoxy terminated allyl polyether group having the structure-C3H6(C2H4O)a(C3H6O)b(C3H5O), wherein a is 10-50 and b is 10-40.
3. The high-toughness bridge reinforcing structural adhesive according to claim 2, wherein the component A comprises 80-90 parts of epoxy resin, 13-20 parts of polyether modified siloxane and 150 parts of filler; the component B comprises 50-60 parts of curing agent, 100-150 parts of filler and 1-3 parts of curing accelerator.
4. The high toughness bridge reinforcing structural adhesive of claim 3, wherein said B component further comprises 3 to 5 parts of a toning agent.
5. The high tenacity bridge reinforcing structure glue according to claim 4, wherein said toner is selected from at least one of carbon black or iron black.
6. A high toughness bridge reinforcing structure adhesive according to any one of claims 1 to 5, wherein said filler is at least one selected from the group consisting of silica fume, talc, barite powder and calcium carbonate.
7. The high toughness bridge reinforcing structural adhesive according to claim 6, wherein the weight ratio of the component A to the component B is 3:1 to 1: 1.
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| CN201911254509.8A CN110903796A (en) | 2019-12-10 | 2019-12-10 | High-toughness bridge reinforcing structure adhesive |
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| CN201911254509.8A CN110903796A (en) | 2019-12-10 | 2019-12-10 | High-toughness bridge reinforcing structure adhesive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181515A (en) * | 2022-07-08 | 2022-10-14 | 苏州高泰电子技术股份有限公司 | Adhesive and UV adhesive tape |
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