CN107827772A - A kind of cation modified asphalt emulsifying agent, its preparation method and its application - Google Patents
A kind of cation modified asphalt emulsifying agent, its preparation method and its application Download PDFInfo
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- CN107827772A CN107827772A CN201711136581.1A CN201711136581A CN107827772A CN 107827772 A CN107827772 A CN 107827772A CN 201711136581 A CN201711136581 A CN 201711136581A CN 107827772 A CN107827772 A CN 107827772A
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C237/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups
- C07C237/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton
- C07C237/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
- C07C237/10—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atom of at least one of the carboxamide groups bound to an acyclic carbon atom of a hydrocarbon radical substituted by nitrogen atoms not being part of nitro or nitroso groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/12—Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
Abstract
The invention discloses a kind of cation modified asphalt emulsifying agent, its preparation method and its application.The preparation method of cation modified asphalt emulsifying agent of the present invention is：Long chain alkyl primary amine, cation acrylamide monomer and alcohols solvent are well mixed, 2 12h are reacted under the conditions of 40 80 DEG C, you can obtains reaction product, the wherein mol ratio of long chain alkyl primary amine, cation acrylamide monomer and alcohols solvent is 1.00：（2.02‑2.10）：（5.00‑10.00）.Modified pitch emulsifying agent of the present invention can protonate in acid condition when preparing soap lye, and it is water-soluble to further enhance it；Asphalt emulsifier raw material of the present invention is easy to get, synthesis condition is gentle, technique is simple, the strong adaptability with pitch, is adapted to large-scale production.This emulsifier is functional, and the emulsified asphalt storage stability of preparation is strong, good with the adhesiveness gathered materials, can meet practical engineering application.
Description
Technical field
The present invention relates to a kind of cation modified asphalt emulsifying agent, its preparation method and its application, belong to road industry
With the crossing domain of applied chemistry.
Background technology
Emulsified asphalt is a kind of oil-in-water type asphalt emulsion for being prepared by pitch and emulsifying agent under certain process conditions,
The characteristics of with easy to use, environmentally friendly and energy-conservation.It can be not only used for newly-built road construction, such as sticking layer oil, priming oil；It can also be used for
Prepare cold mixing material, slurry seal etc..Played an increasingly important role in road construction, care field.Wherein prepare emulsification drip
Blue or green core technology is exactly asphalt emulsifier, causes the broad interest of researcher in recent years.
Cationic emulsified asphalt is due to having the characteristics that and aggregate adhesion is strong, the good heat as research of storage stability
Put and be used widely.Quaternary ammonium salt cationic asphalt emulsifier research at present is more, splits type in being generally or splits type soon.No
With the quaternary ammonium salt cationic emulsifying agent of molecular structure, the emulsified asphalts such as slurry seal, permeable layers, adhesion coating neck can be respectively applied to
Domain.At present, for porous asphalt pavement, ultra-thin wearing layer, deck paving contour energy road surface adhesion coating application field, to emulsification
The performance of pitch it is also proposed higher requirement.Therefore need exploitation can be with the emulsifying agent of emulsified modified asphalt, for preparing SBS
The modified emulsifying asphalt such as emulsified asphalt or high viscosity emulsified asphalt.
Patent CN103274972A discloses a kind of amphoteric ion type modified pitch emulsifying agent containing quaternary ammonium salt, the pitch
Emulsifying agent can have been lifted with emulsified modified asphalt, the modified emulsifying asphalt storage stability and permeability of preparation.But the breast
Agent needs to compound APEO use.In addition cationic species are few, and storage stability needs further to be improved.Patent
CN105885060A discloses a kind of more amine quaternary ammonium salt cation asphalt emulsifiers of lignin, the emulsified asphalt emulsibility of preparation
Can be preferably.But because raw material is used by the lignin that is extracted in black liquid, it is difficult to ensure raw material sources and product property
It is stable.Patent CN103333136A discloses a kind of preparation method of polyaminoamide cationic asphalt emulsifier, the breast of preparation
Change Bituminous stabilized is good and asphalt emulsifier dosage is few.But the synthesis of the emulsifying agent needs pyroreaction.Patent
CN106831478A, which is disclosed, splits type or slow breaking asphalt emulsifier, the emulsified asphalt of preparation in a kind of polycation teritary amide class
It is less with excellent emulsifiability and emulsifier.Synthetic method mild condition, but synthesis step is more.In addition, should
Emulsifying agent can emulsify different matrix pitches, but not introduce the emulsifying capacity to modified pitch.
The content of the invention
Following problem existing for quaternary ammonium salt cationic asphalt emulsifier described above：Synthesis step is cumbersome, and preparing needs
Want pyroreaction；Raw material sources are unstable；The emulsifying agent of preparation is difficult to emulsified modified asphalt etc..The present invention is by simply synthesizing
Step and gentle synthetic method, a kind of new quaternary ammonium salt cationic modified pitch emulsifying agent is prepared, can not only be emulsified
Modified pitch, and the emulsified asphalt stability prepared is higher.
The purpose of the present invention is to be to provide a kind of cation modified asphalt emulsifying agent, its preparation method and its application.System
Standby asphalt emulsifier synthesis step is simple, mild condition, is adapted to industrialized production.The asphalt emulsifier contains two cations
Center, can occur a certain degree of protonation during soap lye is prepared, and further increase its water solubility, can effectively improve
The stability of modified emulsifying asphalt.
The invention provides a kind of cation modified asphalt emulsifying agent, its general structure are as follows：
Wherein, R1One kind in cetyl, octadecyl, nonadecyl, eicosyl；R2For in H and methyl
It is a kind of.
Cation modified asphalt emulsifying agent of the present invention, its synthetic route are as follows：
The preparation method of cation modified asphalt emulsifying agent of the present invention is：Long chain primary amines are added molten in alcohols solvent
Solution, then add cation acrylamide monomer stirring reaction 2-12 hours under the conditions of 40-80 DEG C, you can prepare cation and change
Property asphalt emulsifier；
The mol ratio of the long chain primary amines, cation acrylamide monomer and alcohols solvent is 1.00：(2.02-2.10)：
(5.00-10.00)。
The alcohols solvent is any one or a few in methanol, ethanol and isopropanol；
The long chain primary amines are any one in cetylamine, octadecylamine, 19 amine and 20 amine；
The cation acrylamide monomer is acrylamido propyl trimethyl ammonium chloride or Methacrylamide propyl group three
Ammonio methacrylate.
The present invention, also provide application of the cation modified asphalt emulsifying agent in adhesion coating modified emulsifying asphalt is prepared.
The present invention provides a kind of preparation method of cation-modified emulsified asphalt, and step is as follows：
(1) the cation modified asphalt emulsifying agent is added to the water, adjusts pH to 2-3 with hydrochloric acid, soap lye is prepared；Its
Described in cation modified asphalt emulsifying agent quality be soap lye quality 3.0-4.0%.
(2) soap lye made from step (1) is heated to 60-70 DEG C and added in colloid mill, is then directly added into and soap lye
Etc. the modified pitch of quality, cation-modified emulsified asphalt is prepared by emulsification；
Wherein modified pitch is SBS modified pitch or self-control modified pitch.
The self-control modified pitch is mixed by matrix pitch and modifying agent, and the modifying agent is appointing in SBR, SBS
Meaning is one or two kinds of, and the volume of the modifying agent is the 4-6% of matrix pitch quality.
The matrix pitch is preferably 70# matrix pitches.
Cation modified asphalt emulsifying agent prepared by the present invention, it can actually occur to a certain degree during soap lye is prepared
Protonation, further enhance the water solubility of emulsifying agent, its principle is as follows：
The raw material of the present invention is easy to get, synthetic method is simple, it is only necessary to single step reaction.In addition reaction condition is gentle, it is not necessary to
Pyroreaction, it is adapted to large-scale production.
The present invention has synthesized a kind of cation modified asphalt emulsification of brand new based on the redesign to molecular structure
Agent.Wherein, the present invention is firstly introduced acrylamido propyl trimethyl ammonium chloride and Methacrylamide hydroxypropyltrimonium chloride
Two kinds of quaternary ammonium salt cationic acrylamide monomers are used to directly prepare asphalt emulsifier as raw material.Pass through simple one-step method
The quaternary ammonium salt cationic that symmetrical structure is introduced in emulsifier molecules structure is reacted, emulsifying agent overall structure has two cations
Center, it is water-soluble preferable.The emulsifying capacity of emulsifying agent is considered in addition, selectively selects suitable chain alkyl primary
Amine.During soap lye is prepared, a certain degree of protonation can occur for the tertiary amine structure on emulsified dose of acid condition, further
It is water-soluble to strengthen it.Now, emulsifying agent is actually polycation structure, and bitumen particle is formd by the way that electric charge is mutually exclusive
Peptizaiton, further improve the stability of emulsified asphalt.
The present invention has following positive beneficial technique effect：
(1) quaternary ammonium salt cationic acrylamide monomer is introduced directly into first to be used to prepare asphalt emulsifier.Pass through a step
Protonation in addition reaction and soap lye preparation process, a variety of parents such as quaternary ammonium salt, amide groups and tertiary amine groups have been introduced directly into it
Water base group, add the hydrophily and the compatibility of emulsifying agent and pitch of emulsifying agent；In addition, on emulsifying agent cationic charge compared with
It is more, it can further improve emulsion storage stability.
(2) synthesis material such as long chain primary amines, cation acrylamide monomer is easy to get, and synthetic method is simple, mild condition, no
Need pyroreaction.
(3) the cation modified asphalt emulsifying agent and the adaptability of pitch prepared is stronger, except can be with emulsified bases pitch
Outside, a variety of modified pitch can also be emulsified.
(4) the cation modified asphalt emulsifying agent prepared using the present invention has preferable emulsifiability, is prepared
Emulsified asphalt properties are excellent, and emulsion particle diameter is smaller, meet all standard for the cationic emulsified bitumen that Ministry of Communications formulates.Tool
Have and split the characteristics of splitting cation asphalt emulgent with soon, can be applied to highway permeable layers, the spread of adhesion coating and other field construction.
Embodiment
The present invention, rather than limitation the scope of the present invention are further illustrated with reference to emulsified asphalt embodiment.Wherein, need
To illustrate that the acrylamido propyl trimethyl ammonium chloride monomer and Methacrylamide oxypropyl trimethyl that are used in the present invention
Ammonium chloride monomer is the liquid monomer that commercially available mass fraction is 50%.
Embodiment 1
(1) preparation of cation modified asphalt emulsifying agent
27.0g octadecylamines (0.10mol) are added in 27.6g ethanol (0.60mol) and dissolved, then add 84.5g propylene
Amidopropyltrimonium chloride monomer (0.205mol), stirring reaction 6 hours under the conditions of 60 DEG C, you can prepare cation-modified
Asphalt emulsifier, give over to emulsified asphalt experiment.
Reaction equation is as follows：
Wherein, during soap lye is prepared, a certain degree of matter can occur for mentioned emulsifier tertiary amine group under sour environment
Sonization, it is water-soluble to further enhance it.
(2) preparation of cation-modified emulsified asphalt
Take the present embodiment cation modified asphalt emulsifying agent 7.5g to be added in suitable quantity of water, pH to 2~3, system are adjusted with hydrochloric acid
It is standby to obtain 250g soap lyes；Soap lye is heated to 60 DEG C and adds colloid mill, 250g SBS modified pitch is then directly added into, passes through
Cation-modified emulsified asphalt is prepared in emulsification.
(3) emulsified asphalt performance detection
The method for testing performance of adhesion coating emulsified asphalt, reference《Standard specification for construction and acceptance of highway asphalt pavement》(the Chinese people are total to
With state's professional standard, JTG-F40 2004).
Cation-modified modified emulsifying asphalt performance data made from the embodiment 1 of table 1
Embodiment 2
(1) preparation of cation modified asphalt emulsifying agent
27.0g octadecylamines (0.10mol) are added in 23.0g ethanol (0.50mol) and dissolved, then add 92.6g methyl
Acrylamido propyl trimethyl ammonium chloride monomer (0.210mol), stirring reaction 8 hours under the conditions of 50 DEG C, you can prepare cation
Modified pitch emulsifying agent, give over to emulsified asphalt experiment.
Reaction equation is as follows：
Wherein, during soap lye is prepared, a certain degree of matter can occur for mentioned emulsifier tertiary amine group under sour environment
Sonization, it is water-soluble to further enhance it.
(2) preparation of cation-modified emulsified asphalt
Take the present embodiment cation modified asphalt emulsifying agent 10.0g to be added in suitable quantity of water, pH to 2~3, system are adjusted with hydrochloric acid
It is standby to obtain 250g soap lyes；Soap lye is heated to 65 DEG C and adds colloid mill, is then directly added into 250g modified pitch, passes through emulsification
Prepare cation-modified emulsified asphalt.Wherein modified pitch is the mixture of 70# matrix pitches and SBR latex, SBR latex matter
Measure 4% that fraction is matrix pitch.
(3) emulsified asphalt performance detection
The method for testing performance of adhesion coating emulsified asphalt, reference《Standard specification for construction and acceptance of highway asphalt pavement》(the Chinese people are total to
With state's professional standard, JTG-F40 2004).
Cation-modified emulsified asphalt performance data made from the embodiment 2 of table 2
Embodiment 3
(1) preparation of cation modified asphalt emulsifying agent
24.1g cetylamines (0.10mol) are added in 22.4g methanol (0.70mol) and dissolved, then add 84.3g propylene
Amidopropyltrimonium chloride monomer (0.204mol), stirring reaction 12 hours under the conditions of 40 DEG C, you can prepare cation and change
Property asphalt emulsifier, give over to emulsified asphalt experiment.
Reaction equation is as follows：
Wherein, during soap lye is prepared, a certain degree of matter can occur for mentioned emulsifier tertiary amine group under sour environment
Sonization, it is water-soluble to further enhance it.
(2) preparation of cation-modified emulsified asphalt
Take the present embodiment cation modified asphalt emulsifying agent 9.0g to be added in suitable quantity of water, pH to 2~3, system are adjusted with hydrochloric acid
It is standby to obtain 250g soap lyes；Soap lye is heated to 60 DEG C and adds colloid mill, is then directly added into 250g modified pitch, passes through breast
Cation-modified emulsified asphalt is prepared in change.Wherein modified pitch is the mixture of 70# matrix pitches and SBS latex, SBS latex
Mass fraction is the 4% of matrix pitch.
(3) emulsified asphalt performance detection
The method for testing performance of adhesion coating emulsified asphalt, reference《Standard specification for construction and acceptance of highway asphalt pavement》(the Chinese people are total to
With state's professional standard, JTG-F40 2004).
Cation-modified emulsified asphalt performance data made from the embodiment 3 of table 3
Embodiment 4
(1) preparation of cation modified asphalt emulsifying agent
The amine of 29.7g 20 (0.10mol) is added in 60.0g isopropanols (1.00mol) and dissolved, then adds 85.9g third
Acrylamide hydroxypropyltrimonium chloride monomer (0.208mol), stirring reaction 4 hours under the conditions of 70 DEG C, you can prepare cation and change
Property asphalt emulsifier, give over to emulsified asphalt experiment.
Reaction equation is as follows：
Wherein, during soap lye is prepared, a certain degree of matter can occur for mentioned emulsifier tertiary amine group under sour environment
Sonization, it is water-soluble to further enhance it.
(2) preparation of cation-modified emulsified asphalt
Take the present embodiment cation modified asphalt emulsifying agent 9.0g to be added in suitable quantity of water, pH to 2~3, system are adjusted with hydrochloric acid
It is standby to obtain 250g soap lyes；Soap lye is heated to 60 DEG C and adds colloid mill, 250g SBS modified pitch is then directly added into, passes through
Cation-modified emulsified asphalt is prepared in emulsification.
(3) cation-modified emulsified asphalt performance detection
The method for testing performance of adhesion coating emulsified asphalt, reference《Standard specification for construction and acceptance of highway asphalt pavement》(the Chinese people are total to
With state's professional standard, JTG-F40 2004).
Cation-modified emulsified asphalt performance data made from the embodiment 4 of table 4
Embodiment 5
(1) preparation of cation modified asphalt emulsifying agent
24.1g cetylamines (0.10mol) are added in 36.8g ethanol (0.80mol) and dissolved, then add 90.8g methyl
Acrylamido propyl trimethyl ammonium chloride monomer (0.206mol), stirring reaction 2 hours under the conditions of 80 DEG C, you can prepare cation
Modified pitch emulsifying agent, give over to emulsified asphalt experiment.
Reaction equation is as follows：
Wherein, during soap lye is prepared, a certain degree of matter can occur for mentioned emulsifier tertiary amine group under sour environment
Sonization, it is water-soluble to further enhance it.
(2) preparation of cation-modified emulsified asphalt
Take the present embodiment cation modified asphalt emulsifying agent 9.0g to be added in suitable quantity of water, pH to 2~3, system are adjusted with hydrochloric acid
It is standby to obtain 250g soap lyes；Soap lye is heated to 70 DEG C and adds colloid mill, is then directly added into 250g modified pitch, passes through emulsification
Prepare cation-modified emulsified asphalt.Wherein modified pitch is sent out by 70# matrix pitches and SBS, SBR particle by high speed shear
Educate and be prepared, SBR and SBS mass fraction are respectively the 2% and 3% of matrix pitch.
(3) emulsified asphalt performance detection
The method for testing performance of adhesion coating emulsified asphalt, reference《Standard specification for construction and acceptance of highway asphalt pavement》(the Chinese people are total to
With state's professional standard, JTG-F40 2004).
Cation-modified emulsified asphalt performance data made from the embodiment 5 of table 5
Embodiment 6
(1) preparation of cation modified asphalt emulsifying agent
The amine of 28.3g 19 (0.10mol) is added in 27.6g ethanol (0.60mol) and dissolved, then adds 89.1g methyl
Acrylamido propyl trimethyl ammonium chloride monomer (0.202mol), stirring reaction 7 hours under the conditions of 55 DEG C, you can prepare cation
Modified pitch emulsifying agent, give over to emulsified asphalt experiment.
Reaction equation is as follows：
Wherein, during soap lye is prepared, a certain degree of matter can occur for mentioned emulsifier tertiary amine group under sour environment
Sonization, it is water-soluble to further enhance it.
(2) preparation of cation-modified emulsified asphalt
Take the present embodiment cation modified asphalt emulsifying agent 9.0g to be added in suitable quantity of water, pH to 2~3, system are adjusted with hydrochloric acid
It is standby to obtain soap lye；Soap lye is heated to 70 DEG C and adds colloid mill, is then directly added into 250g modified pitch, is prepared by emulsifying
Go out cation-modified emulsified asphalt.Wherein modified pitch is developed by high speed shear by 70# matrix pitches and SBS, SBR particle and made
Standby to form, SBR and SBS mass fraction are respectively the 3% and 3% of matrix pitch.
(3) emulsified asphalt performance detection
The method for testing performance of adhesion coating emulsified asphalt, reference《Standard specification for construction and acceptance of highway asphalt pavement》(the Chinese people are total to
With state's professional standard, JTG-F40 2004).
Cation-modified emulsified asphalt performance data made from the embodiment 6 of table 6
It can be found by data in each table, the cation modified asphalt emulsifying agent prepared by the present invention, its preparation method is simple,
Synthesis condition is gentle, is easy to mass produce；The emulsifier is functional, the emulsified asphalt of preparation not only storage stability
By force, and the adhesiveness with gathering materials is strong.Combination property is preferable, can meet the needs of Practical Project.
Claims (7)
1. a kind of cation modified asphalt emulsifying agent, it is characterised in that its general structure is as follows：
Wherein, R1One kind in cetyl, octadecyl, nonadecyl, eicosyl；R2For one in H and methyl
Kind.
A kind of 2. preparation method of cation modified asphalt emulsifying agent described in claim 1, it is characterised in that including：Will be long
Chain primary amine, which is added in alcohols solvent, to be dissolved, and then adds cation acrylamide monomer stirring reaction 2- under the conditions of 40-80 DEG C
12 hours, you can prepare cation modified asphalt emulsifying agent；
The mol ratio of the long chain primary amines, cation acrylamide monomer and alcohols solvent is 1.00：(2.02-2.10)：
(5.00-10.00)。
A kind of 3. preparation method of cation modified asphalt emulsifying agent according to claim 2, it is characterised in that the alcohol
Class solvent is any one or a few in methanol, ethanol and isopropanol；
The long chain primary amines are any one in cetylamine, octadecylamine, 19 amine and 20 amine；
The cation acrylamide monomer is acrylamido propyl trimethyl ammonium chloride or Methacrylamide oxypropyl trimethyl
Ammonium chloride.
4. application of the cation modified asphalt emulsifying agent in adhesion coating modified emulsifying asphalt is prepared described in claim 1.
5. the preparation method of the cation-modified emulsified asphalt comprising cation modified asphalt emulsifying agent described in claim 1, its
It is characterised by, comprises the following steps：
(1) the cation modified asphalt emulsifying agent is added to the water, adjusts pH to 2-3 with hydrochloric acid, soap lye is prepared；Wherein institute
State the 3.0-4.0% that cation modified asphalt emulsifying agent quality is soap lye quality；
(2) soap lye made from step (1) is heated to 60-70 DEG C and added in colloid mill, be then directly added into and made with step (1)
The modified pitch of the quality such as the soap lye obtained, cation-modified emulsified asphalt is prepared by emulsification；
Wherein modified pitch is SBS modified pitch or self-control modified pitch.
6. a kind of preparation method of cation-modified emulsified asphalt according to claim 5, it is characterised in that the self-control changes
Property pitch mixed by matrix pitch with modifying agent, the modifying agent is any one or two kinds in SBR, SBS；
The volume of the modifying agent is the 4-6% of matrix pitch quality.
A kind of 7. preparation method of cation-modified emulsified asphalt according to claim 6, it is characterised in that the matrix drip
Green grass or young crops is 70# matrix pitches.
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