CN110256991A - A kind of concrete assembled bridge special glue and preparation method thereof - Google Patents
A kind of concrete assembled bridge special glue and preparation method thereof Download PDFInfo
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- CN110256991A CN110256991A CN201910629892.4A CN201910629892A CN110256991A CN 110256991 A CN110256991 A CN 110256991A CN 201910629892 A CN201910629892 A CN 201910629892A CN 110256991 A CN110256991 A CN 110256991A
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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
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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
- C09J11/06—Non-macromolecular additives organic
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a kind of two-component epoxy structural rubber and its applications, including the component A containing epoxy resin and the B component containing polynary amine epoxy hardener, it will form the glue for application after A, B component are mixed, B component also includes catalyst, component A also includes as formula 1) compound reacted with isocyanates made from blocked isocyanate, A, it is in a liquid state respectively under B component room temperature, A, B component are mixed and start extremely to be formed between the paste glue not trickled, at least 3 minutes time intervals；Using: at the construction field (site) by A, B component, it is mixed to get mixed system in a stirring kettle, after certain time interval, becomes paste from liquid；The paste glue of aforementioned preparation is applied on building prefabricated components and carries out splicing sealing；The present invention is able to achieve using convention stir device and is stirred evenly, and is avoided the problem that being not easy in the prior art or can not be mixed, and is conducive to the mechanical property etc. for promoting glue, is suitable for site operation.
Description
Technical field
The invention belongs to the field of building materials more particularly to concrete segment beam, prefabricated pier shaft, Big Pipe Pile, section of jurisdiction etc. are pre-
The splicing of component processed seals, and in particular to a kind of two-component epoxy structural rubber and its application.
Background technique
The construction of the construction such as bridge of building field at present develops to prefabricated, batch production, enlarged direction, adopts
It is the construction method that current bridge construction is widelyd popularize with prefabricated subsection or component splicing construction bridge, this construction method has
The advantages that linear variation of beam body is smaller after speed of application is fast, construction area area is few, box beam concrete shrinkage and creep is small and completion；
And when adjacent segment is matched and constructed, it needs in box beam face smearing structure glue, the quality of structure glue performance is then to a certain extent
Directly decide the height of construction quality.
Wherein one of performance of structure glue needs to have more excellent sag resistance energy.Common practice is in original at present
Anti-sag agent (being also thixotropic agent) Lai Shixian is directly added in material, common anti-sag agent has fumed silica, nano-calcium carbonate
Calcium and resin with polyurea structure, however fumed silica and nanometer calcium carbonate have when being added that generation environment pollutes, it is general
Logical mixing apparatus can not be uniformly mixed, and need expensive planet stirring device to be mixed, material loss is compared in production process
Greatly, have thixotropic paste glue construct at the scene ingredient when, common electric mixer is difficult to accomplish to be uniformly mixed, for example, in
State's patent of invention CN106987222A, CN108300393A etc..Certain polyureas anti-sag agent, such as CN106590376B are disclosed
Hyperbranched poly ureas anti-sag agent improve production efficiency although the problem of can solve workshop pollution, it is same
Problem, at the construction field (site), it is impossible to be sufficiently mixed the material of two thixotroping components, and then uniform mixed due to cannot achieve
It closes, will necessarily adversely affect in mechanical property to structure glue and service life.
Therefore, those skilled in the art urgently seeks a kind of methods for being able to solve the above problem.
Summary of the invention
The technical problem to be solved by the present invention is to overcome deficiency in the prior art, one kind is provided and is suitable for site operation simultaneously
Device is mixed using routine and is able to achieve uniformly mixed two-component epoxy structural rubber.
The present invention additionally provides the application method of above-mentioned two-component epoxy structural rubber simultaneously.
In order to solve the above technical problems, a kind of technical solution that the present invention takes is as follows: a kind of two-component epoxy structural rubber,
The two-component epoxy structural rubber includes component A and B component, and the component A includes epoxy resin, and the B component includes polynary
Amine epoxy hardener is will form after mixing the component A with B component for splicing the paste glue of sealing, wherein described
Component A also includes blocked isocyanate, and the blocked isocyanate, which is reacted by formula (1) compound with isocyanates, to be made；
Wherein, R1、R2Separately it is selected from alkyl, oxyl, hydrocarbon sulfydryl, alkyl carbonyl, hydrocarbyloxycarbonyl, alkyl sulfurous
Acyl group, naphthenic base, cycloalkyloxy, cycloalkanes sulfydryl, carbonyl naphthene, Heterocyclylalkyl, heterocyclylalkoxy groups, heterocycle alkane sulfydryl, heterocycle alkane
Base carbonyl, aryl, aryloxy group, aryloxy group alkyl, aromatic thiohydroxy, aryl carbonyl, alkyl sulfuryl, cycloalkanes sulfuryl or fragrant sulfuryl；
In terms of mass percentage, the B component also includes to account for the raw material total amount of feeding of the two-component epoxy structural rubber
The catalyst of 0.1-1.5%, the catalyst are compound shown in following formula:
Wherein, R3、R4、R5Separately it is selected from C1-10Alkyl；
The component A is mixed with the B component certainly in trickling liquid respectively under the component A and the B component room temperature
The paste glue for splicing sealing for starting not trickle to formation is (i.e. with thixotropic paste body shape for splicing sealing
Glue) between, there is at least time interval of 3min.
In the present invention, " room temperature " is also general temperature or room temperature, generally 25 ± 10 DEG C." trickling liquid " has stream
The liquid of performance is dropped down, there is preferable self-leveling.
Some preferred aspects according to the present invention, the R1、R2The carbon number contained is respectively 1-20；It is highly preferred that described
R1、R2The carbon number contained is respectively 1-10.
More according to the present invention specific and preferred aspect, the R1、R2Separately it is selected from C1-6Alkyl, C1-6
Oxyl, C1-6Hydrocarbon sulfydryl, C1-6Alkyl carbonyl, C1-6Hydrocarbyloxycarbonyl, C1-6Alkyl sulfinyl, C3-6Naphthenic base, C3-6Ring
Alkoxy, C3-6Cycloalkanes sulfydryl, C3-6Carbonyl naphthene, C4-8Heterocyclylalkyl, C4-8Heterocyclylalkoxy groups, C4-8Heterocycle alkane sulfydryl, C4-8It is miscellaneous
Naphthene base carbonyl, C5-10Aryl, C5-10Aryloxy group, C5-10Aryloxy group alkyl, C5-10Aromatic thiohydroxy, C5-10Aryl carbonyl, C1-6Alkyl sulfone
Base, C3-6Cycloalkanes sulfuryl or C5-10Fragrant sulfuryl.
In some preferred embodiments of the invention, formula (1) compound be selected from one of such as flowering structure or
A variety of combinations:
According to the present invention, when the component A is mixed with the B component 3~20min in, the component A
Trickling liquid is remained with the mixed system of the B component, is formed later for splicing the paste glue of sealing and (having anti-
Sagging or thixotropic paste body shape glue, can be applied to elevation construction).
Some preferred aspects according to the present invention, the time interval are 3-10min；It is highly preferred that the time interval
For 3-8min, further preferably 3~5min.
Some preferred aspects according to the present invention keep the formula (1) compound and the isocyanates anti-at 30-40 DEG C
The blocked isocyanate should be prepared.
Some preferred aspects according to the present invention, in the reaction for preparing the blocked isocyanate, formula (1) compound
Feed intake mole and feed intake the ratio between the mole of middle isocyanate group of the isocyanates is 1.01-1.05: 1.
Some preferred aspects according to the present invention, in terms of mass percentage, the inventory of the blocked isocyanate is accounted for
The 1-8% of the raw material total amount of feeding of the two-component epoxy structural rubber；It is highly preferred that in terms of mass percentage, the sealing end
The inventory of isocyanates accounts for the 1-5% of the raw material total amount of feeding of the two-component epoxy structural rubber；It is further preferred that with matter
Percentage composition meter is measured, the inventory of the blocked isocyanate accounts for the 1- of the raw material total amount of feeding of the two-component epoxy structural rubber
3%.
The mass ratio that feeds intake of more according to the present invention specific and preferred aspect, the component A and the B component is 2-
4: 1, it is highly preferred that the mass ratio that feeds intake of the component A and the B component is 2.5-3.5: 1, it is further preferred that the A group
Point with the B component feed intake mass ratio be 2.8-3.2: 1, a specific aspect according to the present invention, the component A with it is described
The mass ratio that feeds intake of B component is 3: 1；
Wherein, in terms of mass percentage, the component A includes epoxy resin 65-95%, blocked isocyanate 1-
11%, silicon powder 0-25%；
In terms of mass percentage, the B component includes polynary amine epoxy hardener 70-100%, silicon powder 0-
10%, curing accelerator 0-20%, catalyst 0.1-5%.
Some specific aspects according to the present invention, the curing accelerator are selected from 2,4,6- tri- (dimethylamino methyl) benzene
Phenol, benzyl dimethylamine, adjacent one of hydroxybenzyl dimethylamine and n,N-Dimethylaniline or a variety of combinations.
Some specific aspects according to the present invention, the epoxy resin are selected from bisphenol A type epoxy resin, phenol aldehyde modified pair
One of phenol A type epoxy resin and bisphenol f type epoxy resin or a variety of combinations.
Some specific aspects according to the present invention, the isocyanates are diisocyanate or triisocyanate or both
Combination.In certain specific embodiments of the invention, the isocyanates includes toluene di-isocyanate(TDI) (TDI), different Fo Er
Ketone diisocyanate (IPDI), methyl diphenylene diisocyanate (MDI), dicyclohexyl methyl hydride diisocyanate (HMDI), six
Methylene diisocyanate (HDI), naphthalene propylhomoserin diisocyanate (NDI) etc..
Some specific aspects according to the present invention, the polynary amine epoxy hardener are selected from aliphatic polyamine, rouge
One of ring race polyamine, aromatic polyamine, polyamide and polyetheramine or a variety of combinations.A tool according to the present invention
In terms of body, the polynary amine epoxy hardener is trimethylhexamethylenediamine.
More according to the present invention preferred and specific aspect, the R3、R4、R5Separately it is selected from methyl, ethyl
Or propyl.A specific aspect according to the present invention, the catalyst are trimethylpyrazine (i.e. R3、R4、R5It is methyl).
Another technical solution provided by the invention: a kind of application method of two-component epoxy structural rubber described above, institute
The application method for stating epoxy structural rubber includes the following steps:
Firstly, at the construction field (site) by the component A and the B component, being mixed to get mixed system in a stirring kettle, this is mixed
Zoarium ties up to after the time interval, and generating has thixotropic paste glue for splicing sealing；
Splicing sealing is carried out secondly, the paste glue of aforementioned preparation is applied on building prefabricated components；The wherein building
Prefabricated components include concrete segment beam, prefabricated pier shaft, Big Pipe Pile, section of jurisdiction.
In the present invention, the stirred tank can be the stirred tank of various conventional belt rabbling mechanisms, without expensive row
Star agitating device.
In the present invention, using formula (1) compound blocked isocyanate containing active methylene group, so that closed isocyanic acid
Ester group stability with higher, is conducive to further increase storage stability, at the same when practical application and by the component A with
When the B component is mixed, the blocked isocyanate contacted with atmosphere will be dissociated, and closed isocyanates can be gradually
The isocyanate group with reactivity is released, thus react with the polynary amine epoxy hardener in the B component,
Generate polyurea structure anti-sag agent, can be formed after at least time interval of 3-20min with anti-sag effect can
For splicing the paste glue of sealing；Specifically, in the process, the early period of each component mixing, the mixed system of liquid state have
Splendid mobile performance, by electric stirring equipment can ensure whole system mixing more evenly, wherein blocked isocyanate,
Polynary amine epoxy hardener is uniformly dispersed in each position of mixed system, blocks isocyanide during mixing
Ester compound gradually dissociates isocyanate group, so that can react and be formed poly- in each position of mixed system
The anti-sag agent of urea structure avoids direct addition anti-sag agent or thixotropic agent bring in the prior art and is not easy or can not mix
Defect, be conducive to the mechanical property and service life etc. that promote epoxy structural rubber, and also avoid using row costly
The equipment such as star agitating device can facilitate site operation, so as to preferably be applied to concrete segment beam, prefabricated pier shaft, big
The splicing of the prefabricated components such as tubular pole, section of jurisdiction seals.
Due to the use of above technical scheme, the invention has the following advantages over the prior art:
Two-component epoxy structural rubber of the invention, storage stability is good, and is able to achieve and is stirred using conventional agitating device
It mixes and uniformly avoids the problem that being not easy or can not mixing using conventional agitating device in the prior art, be conducive to promote epoxy knot
Mechanical property and service life of structure glue etc. are suitable for site operation, can control to be formed for splicing the paste glue of sealing
Time interval, and then the prefabricated components such as concrete segment beam, prefabricated pier shaft, Big Pipe Pile, section of jurisdiction being suitable under varying environment
Splicing sealing.
Specific embodiment
Above scheme is described further below in conjunction with specific embodiment；It should be understood that these embodiments are for illustrating
The basic principles, principal features and advantages of the present invention, and the present invention is not by the scope limitation of following embodiment；It is used in embodiment
Implementation condition further adjustment can be done according to specific requirement, the implementation condition being not specified is usually the item in routine experiment
Part.
In following, unless otherwise specified, all raw materials are substantially from conventional method that is commercially available or passing through this field
It is prepared.
The structure of following formula used in the examples (1) compounds is specific as follows:
The preparation of 1 blocked isocyanate of embodiment
Formula (1a) compound (1.01mol), 2,4- toluene di-isocyanate(TDI) (0.5mol) are weighed, is mixed, it is anti-at 35 DEG C
It answers, blocked isocyanate shown in formula (2a) is made.
The preparation of 2 blocked isocyanate of embodiment
Formula (1b) compound (1.01mol), isophorone diisocyanate (0.5mol) are weighed, is mixed, it is anti-at 40 DEG C
It answers, blocked isocyanate shown in formula (2b) is made.
The preparation of 3 blocked isocyanate of embodiment
Formula (1c) compound (1.01mol), hexamethylene diisocyanate (0.5mol) are weighed, is mixed, it is anti-at 40 DEG C
It answers, blocked isocyanate shown in formula (2c) is made.
The preparation of 4 blocked isocyanate of embodiment
Formula (1d) compound (1.01mol), methyl diphenylene diisocyanate (0.5mol) are weighed, is mixed, at 30 DEG C
Blocked isocyanate shown in formula (2d) is made in reaction.
Embodiment 5-8
Following embodiment 5-8 provide a kind of two-component epoxy structural rubber (not adding catalyst in B component) respectively, with matter
Number meter is measured, composition of raw materials includes: 300 parts of component A, 100 parts of B component；Specific ingredient and dosage are referring to the following table 1.
The formulation dosage of two-component epoxy structural rubber shown in table 1, embodiment 5-8
The splicing that two-component epoxy structural rubber shown in above-described embodiment 5-8 is applied to building prefabricated components is sealed, tool
Body mode of operation is as follows:
Firstly, directly at the construction field (site) by component A described in each embodiment and the B component, in common stirred tank
In be mixed to get mixed system, which is in a liquid state always in a certain time interval, easily stirring flowing, and herein it
Afterwards, the viscosity of mixed system steeply rises, and is gradually in body of paste, forms the paste for splicing sealing with anti-sag
The epoxy structural rubber of catalyst is as not added in glue；
Splicing sealing is carried out secondly, the paste glue of aforementioned preparation is applied on building prefabricated components.
The time interval for measuring each embodiment in above-mentioned mixing process is as shown in table 2.
Table 2
| Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | |
| Time interval (min) | 6 | 12 | 10 | 4 |
Embodiment 9-12
Following embodiment 9-12 provide a kind of two-component epoxy structural rubber of the invention containing catalyst respectively, with mass parts
Number meter, composition of raw materials includes: 300 parts of component A, 100 parts of B component；Specific ingredient and dosage are referring to the following table 3.
The formulation dosage of two-component epoxy structural rubber shown in table 3, embodiment 9-12
The splicing that two-component epoxy structural rubber shown in above-described embodiment 9-12 is applied to building prefabricated components is sealed, tool
Body mode of operation is as follows:
Firstly, directly at the construction field (site) by component A described in each embodiment and the B component, in common stirred tank
In be mixed to get mixed system, which is in a liquid state always in a certain time interval, easily stirring flowing, and herein it
Afterwards, the viscosity of mixed system steeply rises, and is gradually in body of paste, forms the paste for splicing sealing with anti-sag
Glue, the epoxy structural rubber as of the invention containing catalyst；
Splicing sealing is carried out secondly, the paste glue of aforementioned preparation is applied on building prefabricated components.
The time interval for measuring each embodiment in above-mentioned mixing process is as shown in table 4.
Table 4
| Embodiment 9 | Embodiment 10 | Embodiment 11 | Embodiment 12 | |
| Time interval (min) | 11 | 10 | 6 | 3 |
Can be learnt by above-described embodiment: the specific two-component epoxy structural rubber of the present invention, each component mixing early period,
Mixed system has splendid mobile performance, and wherein blocked isocyanate, polynary amine epoxy hardener are uniformly dispersed
Each position of mixed system, blocked isocyanate gradually dissociates isocyanate group during mixing, so that
Each position of mixed system can react and form the anti-sag agent of polyurea structure, so that polyurea structure is anti-
Sagging agent dispersibility in whole system is splendid, and it is raw to avoid directly addition anti-sag agent (thixotropic agent) bring in the prior art
Production and difficulty of construction.The presence of time interval makes construction personnel that there is time enough whole system is used convention stir kettle
Mixing more evenly, is conducive to promote mechanical property and service life of epoxy structural rubber etc., and it is relatively high to also avoid use
The equipment such as expensive planet stirring device can facilitate site operation, and the addition of special catalyst and specific blocked isocyanate
Preferably control the length of time interval respectively, so as to be applicable under varying environment concrete segment beam, prefabricated pier shaft,
The splicing of the prefabricated components such as Big Pipe Pile, section of jurisdiction seals.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of two-component epoxy structural rubber, the two-component epoxy structural rubber includes component A and B component, and the component A includes
Epoxy resin, the B component include polynary amine epoxy hardener, are will form after the component A is mixed with B component for spelling
Connect the paste glue of sealing, it is characterised in that: the component A also includes blocked isocyanate, and the blocked isocyanate passes through
Formula (1) compound is reacted with isocyanates and is made；
Wherein, R1、R2Separately it is selected from alkyl, oxyl, hydrocarbon sulfydryl, alkyl carbonyl, hydrocarbyloxycarbonyl, alkyl sulfurous
Acyl group, naphthenic base, cycloalkyloxy, cycloalkanes sulfydryl, carbonyl naphthene, Heterocyclylalkyl, heterocyclylalkoxy groups, heterocycle alkane sulfydryl, heterocycle alkane
Base carbonyl, aryl, aryloxy group, aryloxy group alkyl, aromatic thiohydroxy, aryl carbonyl, alkyl sulfuryl, cycloalkanes sulfuryl or fragrant sulfuryl；
In terms of mass percentage, the B component also includes the raw material total amount of feeding 0.1- for accounting for the two-component epoxy structural rubber
1.5% catalyst, the catalyst are compound shown in following formula:
Wherein, R3、R4、R5Separately it is selected from C1-10Alkyl；
Respectively in trickling liquid under the component A and the B component room temperature, since the component A is mixed with the B component
To being formed between the paste glue for splicing sealing not trickled, there is at least time interval of 3min.
2. two-component epoxy structural rubber according to claim 1, which is characterized in that the R1、R2The carbon number difference contained
For 1-20；It is highly preferred that the R1、R2The carbon number contained is respectively 1-10.
3. epoxy structural rubber according to claim 2, which is characterized in that the R1、R2Separately it is selected from C1-6Hydrocarbon
Base, C1-6Oxyl, C1-6Hydrocarbon sulfydryl, C1-6Alkyl carbonyl, C1-6Hydrocarbyloxycarbonyl, C1-6Alkyl sulfinyl, C3-6Naphthenic base,
C3-6Cycloalkyloxy, C3-6Cycloalkanes sulfydryl, C3-6Carbonyl naphthene, C4-8Heterocyclylalkyl, C4-8Heterocyclylalkoxy groups, C4-8Heterocycle alkane sulfydryl,
C4-8Heterocycloalkylcarbonyl, C5-10Aryl, C5-10Aryloxy group, C5-10Aryloxy group alkyl, C5-10Aromatic thiohydroxy, C5-10Aryl carbonyl, C1-6
Alkyl sulfuryl, C3-6Cycloalkanes sulfuryl or C5-10Fragrant sulfuryl.
4. two-component epoxy structural rubber described in any one of -3 claims according to claim 1, which is characterized in that the formula
(1) compound is selected from one of such as flowering structure or a variety of combinations:
5. two-component epoxy structural rubber according to claim 1, which is characterized in that certainly by the component A and the B component
In the 3-20min started when mixing, the mixed system of the component A and the B component remains trickling liquid, later shape
At the paste glue for splicing sealing.
6. two-component epoxy structural rubber according to claim 1 or 5, which is characterized in that the time interval is 3-
10min, further preferably 3~5min.
7. two-component epoxy structural rubber according to claim 1, which is characterized in that make the formula (1) compound with it is described
Isocyanates reacts at 30-40 DEG C prepares the blocked isocyanate；And/or prepare the reaction of the blocked isocyanate
In, feed intake the ratio between the mole of middle isocyanate group of feed intake mole and the isocyanates of formula (1) compound is
1.01-1.05:1；And/or
In terms of mass percentage, the raw material that the inventory of the blocked isocyanate accounts for the two-component epoxy structural rubber is always thrown
The 1-8% of doses；Preferably, in terms of mass percentage, the inventory of the blocked isocyanate accounts for the two-component epoxy
The 1-5% of the raw material total amount of feeding of structure glue；It is highly preferred that the blocked isocyanate feeds intake in terms of mass percentage
Amount accounts for the 1-3% of the raw material total amount of feeding of the two-component epoxy structural rubber.
8. two-component epoxy structural rubber according to claim 1, which is characterized in that the throwing of the component A and the B component
Expect that mass ratio is 2-4: 1；
Wherein, in terms of mass percentage, the component A includes epoxy resin 65-95%, blocked isocyanate 1-11%, silicon
Micro mist 0-25%；In terms of mass percentage, the B component includes polynary amine epoxy hardener 70-100%, silicon powder 0-
10%, curing accelerator 0-20%, catalyst 0.1-5%.
9. two-component epoxy structural rubber according to claim 1 or 8, which is characterized in that the epoxy resin is selected from double
One of phenol A type epoxy resin, phenol aldehyde modified bisphenol A type epoxy resin and bisphenol f type epoxy resin or a variety of combinations；
And/or the isocyanates is the combination of diisocyanate or triisocyanate or both；And/or the polynary amine epoxy
Curing agent is selected from one of aliphatic polyamine, alicyclic polyamine, aromatic polyamine, polyamide and polyetheramine or more
The combination of kind；And/or the R3、R4、R5Separately it is selected from methyl, ethyl or propyl.
10. the application method of two-component epoxy structural rubber described in a kind of any one of claim 1-9 claim, feature
It is, the application method of the epoxy structural rubber includes the following steps:
Firstly, at the construction field (site) by the component A and the B component, being mixed to get mixed system in a stirring kettle, the mixture
It ties up to after the time interval, generating has thixotropic paste glue for splicing sealing；
Splicing sealing is carried out secondly, the paste glue of aforementioned preparation is applied on building prefabricated components；The wherein building prefabrication
Component includes concrete segment beam, prefabricated pier shaft, Big Pipe Pile, section of jurisdiction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111607346A (en) * | 2020-05-08 | 2020-09-01 | 广西大学 | High-performance structural adhesive and preparation method and construction method thereof |
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