CN106554470B - A method of preparing the Aggregate SBS latex for modified emulsifying asphalt or modified pitch - Google Patents
A method of preparing the Aggregate SBS latex for modified emulsifying asphalt or modified pitch Download PDFInfo
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- CN106554470B CN106554470B CN201510642070.1A CN201510642070A CN106554470B CN 106554470 B CN106554470 B CN 106554470B CN 201510642070 A CN201510642070 A CN 201510642070A CN 106554470 B CN106554470 B CN 106554470B
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Abstract
The invention discloses a kind of methods for preparing the Aggregate SBS latex for modified emulsifying asphalt or modified pitch, this method is added to SBS hexamethylene glue in the aqueous solution of the hydrophilic monomer containing initiator and with alkenyl after emulsification pretreatment, it is stirred to react at a temperature of 45~65 DEG C 2~3 hours, extract partial solvent, up to Aggregate SBS latex, this method has at low cost, simple process, and product stability is good, solid content is high, versatile feature, the Aggregate SBS latex of preparation can be applied to cationic, anionic and the modified production modified emulsifying asphalt of non-ionic emulsified asphalt, finished solid SBS can also be replaced to produce SBS modified pitch to asphalt modification.
Description
Technical field
The present invention relates to a kind of preparation methods for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch, belong to
Polymer Synthesizing field.
Background technique
Emulsified SBS modified asphalt is a kind of Cost of New Type Asphalt Pavement binder, has energy conservation, ring relative to SBS modified pitch
The advantages that protecting, be easy to use.Thus production high-performance, high-quality emulsion SBS modified pitch have highway construction very great
Meaning.
Currently, (1) is by solid SBS and pitch, mix is first made after SBS modified pitch and is prepared into emulsification again and changes at high temperature
Property pitch technique, high, complex process is required to equipment for production of emulsified bitumen, and SBS content in pitch is low, emulsified SBS is modified
The performance of pitch is not able to satisfy high-grade highway requirement.Such as using first being emulsified matrix pitch, with SBS latex mix system again
At the technique of emulsified modified asphalt, then to equipment for production of emulsified bitumen require it is low, simple process, SBS content in pitch can be improved, and
The performance of emulsified SBS modified asphalt can meet high-grade highway requirement；(2) preparation method of existing SBS modified pitch is
Using solid SBS be added heated bitumen in by colloid mill grind and stir development, modified asphalt device investment greatly, complex process,
Energy consumption is high, such as prepares SBS modified pitch using liquid SBS latex, can reduce modified asphalt device investment, simple process, energy consumption
It is low.Thus the SBS latex technology of preparing of exploitation function admirable is of great significance.
The technology of preparing of existing SBS latex is that solid SBS finished product is dissolved in organic solvent to add emulsifier, water again, with
And some auxiliary agents carry out emulsification and are prepared.Publication No. CN102936345A patent discloses a kind of preparation side of SBS latex
Emulsifier, solvent are mixed with SBS, water are slowly added in mixture by method, and after placing 30min, stabilizer and flocculation is added
Agent is then evaporated under reduced pressure, and obtains SBS latex.The method prepares the technique of SBS latex, and there are product cost height, service performance are poor
The disadvantages of with without versatility.The crosslinked at low temperature emulsified SBS modified asphalt of Publication No. CN103965492A patent disclosure adds
Add the preparation method of agent, Publication No. CN1580119A patent discloses a kind of preparation method of latex composition, Publication No.
CN1443783A patent discloses a kind of preparation method of thermoplastic elastomer (TPE) aqueous emulsifying dispersion solution, Publication No.
CN102089376A patent discloses a kind of preparation method of artificial latex, the method in these patents all exist complex process,
The disadvantages of product cost height and poor service performance.Existing patent is all made of solid SBS product is dissolved in corresponding organic solvent after
Latex is prepared, therefore there is the at high cost of product, the disadvantages of service performance is poor, the performance of prepared modified emulsifying asphalt refers to
Mark is not able to satisfy high-grade highway requirement.
Summary of the invention
For defect existing for existing preparation Aggregate SBS latex preparation process, the purpose of the invention is to provide one
Kind low cost, operating procedure is simple, service performance is good, is applicable to the Aggregate SBS latex of modified emulsifying asphalt or modified pitch
Method.
In order to realize technical purpose of the invention, prepare the present invention provides a kind of for modified emulsifying asphalt or modified drip
The method of green Aggregate SBS latex, this method is that SBS hexamethylene glue is added to containing initiator and with the hydrophily of alkenyl
In the aqueous solution of monomer after emulsification pretreatment, be stirred to react at a temperature of 45~65 DEG C 2~3 hours, extract partial solvent to get
Aggregate SBS latex.
It is hydrophilic by being grafted in its double bond as raw material using SBS hexamethylene glue for the first time in technical solution of the present invention
Property group pass through emulsion dispersion simultaneously and obtain modified poly SBS latex.Method of the invention is in finished industrial product SBS production process
Intermediate products SBS hexamethylene glue be raw material, substantially reduce Aggregate SBS latex production cost, and prepare Aggregate SBS glue
Cream can be applied to the modification of cationic, anionic and non-ionic emulsified asphalt, finished solid SBS can also be replaced to drip heat
Blueness is modified.
SBS hexamethylene glue in technical solution of the present invention is to be prepared by a conventional method to obtain: being with butadiene, benzene second
Alkene is monomer, and hexamethylene is solvent, and butyl lithium is initiator, and tetrahydrofuran (THF) is structure regulator, and silicon tetrachloride etc. is even
Mixture, line style (typical structure S-B-S) or multi-arm star-shaped (typical structure (SB) synthesized through anionic polymerisation4SI SBS ring)
Hexane glue is referred to as SBS by habit；Or using cyclopentadienyl again is the chosen property of catalyst system to the (packet of butadiene segment in SBS molecule
Including 1,2- structure and Isosorbide-5-Nitrae-structure) double bond carries out selection plus hydrogen, and retains a part of double bond, obtain SBS hexamethylene glue (SBS
Solid content 15~25%).SBS hexamethylene glue and the difference of industry SBS asphalt modifier are passed through by SBS hexamethylene glue
Cohesion, dehydration, extruding be granulated, drying and etc. i.e. further be made industry SBS asphalt modifier.
The method of preparation of the invention for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch further includes following excellent
Select scheme:
In preferred scheme, SBS hexamethylene glue is the intermediate products in industrial SBS modifier production process.
In preferred scheme, SBS hexamethylene glue solid content is 15%~25%.
In preferred scheme, SBS is the styrene synthesized by living anion polymerization method and fourth in SBS hexamethylene glue
Diene block copolymer, S are styrene block, and B is butadiene block, mole of styrene units and butadiene unit in SBS
Ratio is 1:1.5~1:4.
More preferably in scheme, the degree of hydrogenation of butadiene unit is 60~98% in SBS.
More preferably in scheme, the hydrophilic monomer quality with alkenyl be SBS hexamethylene glue in SBS mass 0.1~
5%.
In preferred scheme, the aqueous solution of the hydrophilic monomer containing initiator and with alkenyl includes following mass parts group
Point: 40~55 parts of water, 4~9 parts of emulsifier, 1~1.5 part of the hydrophilic monomer with alkenyl, 1~2 part of defoaming agent, initiator 0.5
~1 part.
More preferably in scheme, emulsifier is by splitting or splitting slowly emulsifier, polyethers emulsification for producing in emulsified asphalt
Agent and inorganic salts compounding composition, wherein for produce split in emulsified asphalt or split slowly emulsifier mass percentage content be 45
~58%, polyethers emulsifier mass percentage content is 37~50%, and inorganic salts mass percentage content is 1~5%.
More preferably in scheme, polyethers emulsifier is OP series and/or MOA series.
More preferably in scheme, inorganic salts KCl, NaCl, K2SO4And Na2SO4At least one of.
In preferred scheme, defoaming agent is the organic defoaming agent of siliceous class.Most preferably dimethyl silicone polymer and/or emulsification
Silicone oil.
In preferred scheme, initiator is azo-initiator.Most preferably AIBN.
In preferred scheme, the mass ratio of water is not less than 12:7 in SBS hexamethylene glue and the aqueous solution.
More preferably in scheme, the hydrophilic monomer with alkenyl is the monomer containing sulfonic group and vinyl simultaneously.
The method of preparation Aggregate SBS latex of the invention the following steps are included:
1) by 40~55 parts by weight water, 4~9 parts by weight Emulsifier, 1~1.5 part by weight of hydrophilic monomer (such as to vinyl
Benzene sulfonic acid sodium salt), 1~2 parts by weight defoaming agent (such as dimethyl silicone polymer or silicone emulsion) and 0.5~1 parts by weight initiator (such as
AIBN), it is added in reaction kettle, stirring is warming up to 50~80 DEG C of premixs and is made into aqueous solution；
2) 250~450 parts by weight SBS hexamethylene glues are added in pre- mixed aqueous solution, and use can produce cream
The colloid mill emulsification pretreatment for changing pitch forms latex；
3) 45~65 DEG C are maintained the temperature to be stirred to react 2~3 hours, so that SBS strand is grafted upper hydrophilic monomer (such as right
Vinylbenzenesulfonic acid sodium)；
4) vacuum pump pressure distillation is opened, hexamethylene and part water are extracted, Aggregate SBS latex is made.
Compared with the prior art, technical solution of the present invention bring the utility model has the advantages that
For the primary raw material that the present invention uses for the intermediate products SBS hexamethylene glue during industrial production SBS, gained is poly-
Closing SBS latex and comparing solubilizer need to be dissolved using industrial SBS modifier product again, then emulsify and extract again the technique of solvent
Scheme can greatly save material and production cost；The present invention makes SBS strand be grafted upper hydrophilic monomer, prepared polymerization
SBS latex solid content is high, and viscosity is low, and service performance is good；And it is dripped using the modified emulsifying of SBS latex production prepared by the present invention
Green softening point is high, and performance is excellent；SBS modified pitch is prepared, modified asphalt device investment is small, simple process, low energy consumption.
Since prepared latex is applicable to the emulsified asphalt of different type emulsifier preparation, be a kind of function admirable,
It is modified to can be applied to cationic, anionic and non-ionic emulsified asphalt, can also finished solid SBS be replaced to be applied to base
Matter asphalt modification produces SBS modified pitch.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the claims in the present invention protection scope.
Comparative example 1
According to the preparation side of SBS latex disclosed in the Chinese invention patent that application publication number is " 102936345 A of CN "
Method prepares SBS latex.Mass ratio by pitch in SBS in SBS latex and emulsified bases pitch is 4:100, is emulsified to middle sea 70#
SBS latex prepared by this comparative example is added in matrix pitch, and is sufficiently mixed, modified emulsifying asphalt is made.
Softening point test is carried out to modified emulsifying asphalt made from the comparative example according to standard GB/T/T 4507-2014,
The results are shown in Table 1.
Comparative example 2
According to the preparation side of SBS latex disclosed in the Chinese invention patent that application publication number is " 102936345 A of CN "
Method prepares SBS latex.Mass ratio by pitch in SBS in SBS latex and emulsified bases pitch is 4:100, is emulsified to Shandong 70#
SBS latex prepared by this comparative example is added in matrix pitch, and is sufficiently mixed, modified emulsifying asphalt is made.
Softening point test is carried out to modified emulsifying asphalt made from the embodiment according to standard GB/T/T 4507-2014,
The results are shown in Table 1.
Embodiment 1
300g DS-02 SBS emulsifier, 75g vinyl sodium benzosulfonate, 56g defoaming agent, 23g are added in a kettle
Initiator and 3375g water stir evenly and are heated to 58 DEG C, and the SBS hexamethylene glue 14kg of 17% content of addition is opened
It opens the overground circulation of circulation shear system and stops circulation after ten minutes, 55 DEG C of constant temperature are stirred to react 2.5 hours, and it is negative to open vacuum pumping
Pressure controls vacuum degree between 0.03~0.06MPa according to foam situation in kettle, and finally obtaining 5.5kg solid content is 40.7%
Aggregate SBS latex.
It is 4:100 by the mass ratio of SBS in SBS latex and emulsified bases pitch studies on asphaltene, to middle sea 70# emulsified bases
SBS latex prepared by embodiment 1 is added in pitch, and is sufficiently mixed, modified emulsifying asphalt is made.According to standard GB/T/T
4507-2014 carries out softening point test to modified emulsifying asphalt made from the embodiment, and the results are shown in Table 1.
Embodiment 2
7kgDS-02 SBS emulsifier, 1.5kg sodium p styrene sulfonate, 3kg defoaming agent, 0.45kg are added in a kettle
Initiator and 70kg water stir evenly and are warming up to 57 DEG C, and the SBS hexamethylene glue 275kg of 17% content of addition opens circulation
The overground circulation of cutting system stops circulation after 15 minutes, 56 DEG C of constant temperature are stirred to react 2.3 hours, open vacuum pumping negative pressure, root
Vacuum degree is controlled in 0.03~0.06MPa according to level of filler material in kettle.Finally obtain the Aggregate SBS that 150kg solid content is 32.6%
Latex.
Mass ratio by pitch in SBS in SBS latex and emulsified bases pitch is 4:100, is dripped to Shandong 70# emulsified bases
SBS latex prepared by Examples 1 and 2 is added in blueness, and is sufficiently mixed, modified emulsifying asphalt is made.According to standard GB/T/
T 4507-2014 carries out softening point test to modified emulsifying asphalt made from Examples 1 and 2, and the results are shown in Table 1.
The softening point contrast table of modified emulsifying asphalt obtained by 1 comparative example of table and embodiment
| Softening point | |
| Embodiment 1 | 65.3 |
| Comparative example 1 | 53.6 |
| Embodiment 2 | 67.8 |
| Comparative example 2 | 53.1 |
It can be obtained by table 1: use process of the present invention, pointed out by the softening of latex prepared by raw material of SBS glue
It is aobvious to be higher than common SBS latex.
Claims (15)
1. a kind of method for preparing the Aggregate SBS latex for modified emulsifying asphalt or modified pitch, which is characterized in that by SBS
Hexamethylene glue is added in the aqueous solution of the hydrophilic monomer containing initiator and with alkenyl after emulsification pretreatment, at 45~65 DEG C
At a temperature of be stirred to react 2~3 hours, extract partial solvent to get Aggregate SBS latex.
2. method of the preparation according to claim 1 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the SBS hexamethylene glue is the intermediate products in industrial SBS modifier production process.
3. side of the preparation according to claim 1 or 2 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch
Method, which is characterized in that the SBS hexamethylene glue solid content is 15%~25%.
4. method of the preparation according to claim 3 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, SBS is the styrene and butadiene block copolymer synthesized by living anion polymerization method in SBS hexamethylene glue
Object, S are styrene block, and B is butadiene block, in SBS the molar ratio of styrene units and butadiene unit be 1:1.5~
1:4。
5. method of the preparation according to claim 4 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the degree of hydrogenation of butadiene unit is 60~98% in the SBS.
6. method of the preparation according to claim 1 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the hydrophilic monomer quality with alkenyl is 0.1~5% of SBS mass in SBS hexamethylene glue.
7. method of the preparation according to claim 1 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the aqueous solution of the hydrophilic monomer containing initiator and with alkenyl includes following content of component: water 40
~55 parts, 4~9 parts of emulsifier, 1~1.5 part of the hydrophilic monomer with alkenyl, 1~2 part of defoaming agent, 0.5~1 part of initiator.
8. method of the preparation according to claim 7 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the emulsifier is by splitting or splitting slowly emulsifier, polyethers emulsifier and inorganic for producing in emulsified asphalt
Salt compounding composition is 100% metering with the quality of emulsifier, wherein emulsifier is split or split slowly in emulsified asphalt for producing
Mass percentage content is 45~58%, and polyethers emulsifier mass percentage content is 37~50%, inorganic salt quality percentage
It is 1~5% than content.
9. method of the preparation according to claim 8 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the polyethers emulsifier is OP series and/or MOA series.
10. method of the preparation according to claim 8 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the inorganic salts are KCl, NaCl, K2SO4And Na2SO4At least one of.
11. method of the preparation according to claim 7 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the defoaming agent is the organic defoaming agent of siliceous class.
12. method of the preparation according to claim 11 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the defoaming agent is dimethyl silicone polymer and/or silicone emulsion.
13. method of the preparation according to claim 7 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the initiator is azo-initiator.
14. method of the preparation according to claim 1 for modified emulsifying asphalt or the Aggregate SBS latex of modified pitch,
It is characterized in that, the mass ratio of water is not less than 12:7 in the SBS hexamethylene glue and the aqueous solution.
15. according to claim 1, preparation described in 6 or 7 is for the Aggregate SBS latex of modified emulsifying asphalt or modified pitch
Method, which is characterized in that the hydrophilic monomer with alkenyl is the monomer containing sulfonic group and vinyl simultaneously.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111164106B (en) * | 2017-10-11 | 2022-03-01 | 日本瑞翁株式会社 | Method for producing polymer latex |
| CN110804316B (en) * | 2019-11-14 | 2022-02-11 | 广州市市维新材料科技有限公司 | Cationic system high-solid-content SBS (styrene butadiene styrene) modified emulsified asphalt |
| CN111218008A (en) * | 2019-11-14 | 2020-06-02 | 湖北大学 | High-stability SBS emulsion for emulsified asphalt |
| CN111205660B (en) * | 2020-01-19 | 2021-10-29 | 山东大山路桥工程有限公司 | Process method for preparing foam SBS modified asphalt and mixture from SBS latex |
| CN113683898A (en) * | 2021-09-02 | 2021-11-23 | 曾亮亮 | Asphalt modifier, modified asphalt and preparation method |
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| CN1365986A (en) * | 2001-01-19 | 2002-08-28 | 巴陵石化岳阳石油化工总厂 | Process for improving compatible stability between SBS and asphalt |
| CN1554700A (en) * | 2003-12-25 | 2004-12-15 | 中国石化集团巴陵石油化工有限责任公 | Preparation method of SBS (styrene butadiene styrene) aqueous emulsion |
| CN101407563A (en) * | 2007-10-09 | 2009-04-15 | 中国石油化工集团公司 | Method for polarizing polymer |
| JP4784081B2 (en) * | 2004-12-01 | 2011-09-28 | 株式会社ブリヂストン | Tread rubber composition for tire and pneumatic tire |
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Patent Citations (4)
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|---|---|---|---|---|
| CN1365986A (en) * | 2001-01-19 | 2002-08-28 | 巴陵石化岳阳石油化工总厂 | Process for improving compatible stability between SBS and asphalt |
| CN1554700A (en) * | 2003-12-25 | 2004-12-15 | 中国石化集团巴陵石油化工有限责任公 | Preparation method of SBS (styrene butadiene styrene) aqueous emulsion |
| JP4784081B2 (en) * | 2004-12-01 | 2011-09-28 | 株式会社ブリヂストン | Tread rubber composition for tire and pneumatic tire |
| CN101407563A (en) * | 2007-10-09 | 2009-04-15 | 中国石油化工集团公司 | Method for polarizing polymer |
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