CN108976351A - The preparation method of graft powder butadiene-styrene rubber - Google Patents
The preparation method of graft powder butadiene-styrene rubber Download PDFInfo
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- CN108976351A CN108976351A CN201710399970.7A CN201710399970A CN108976351A CN 108976351 A CN108976351 A CN 108976351A CN 201710399970 A CN201710399970 A CN 201710399970A CN 108976351 A CN108976351 A CN 108976351A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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Abstract
The invention belongs to rubber to synthesize field, and in particular to a kind of preparation method of graft powder butadiene-styrene rubber.The method, steps are as follows: (1) water, styrene-butadiene latex, reducing agent aqueous solution is sequentially added in polymeric kettle, stirring heating is added the premix of grafted monomers and oxidant, carries out cross-linking reaction, obtain graft modification styrene-butadiene latex；(2) firstly, water, anti-aging agent are added in graft modification styrene-butadiene latex, then, flocculating agent is added and is condensed, after particle coacervation is complete, through centrifugal dehydration, washing, screening, drying, obtains product.The present invention makes a small amount of plasticity monomer be graft-polymerized on styrene-butadiene latex emulsion particle surface, form the emulsion particle of core-shell structure, stratum nucleare is butadiene-styrene rubber, shell is non-viscous resin copolymer, and resin is with chemical bonds on emulsion particle, and graft polymers steric hindrance is larger, in conjunction with its butadiene-styrene rubber with stratum nucleare it is more secured, it more uniformly spreads, cladding isolation effect is more preferable, and storage stability is good.
Description
Technical field
The invention belongs to rubber to synthesize field, and in particular to a kind of preparation method of graft powder butadiene-styrene rubber.
Background technique
According to the definition of British Standard BS2955-1993, polymer of the partial size less than 1mm is known as powder polymer.Partial size
Rubber less than 1mm is then powdered rubber.From the point of view of rubber processing technology, powdered rubber has considerable advantage: as mixed
The refining time is short, power consumption is small, dump temperature is low and finally well dispersed etc..Powdered rubber can also be as the fillers such as carbon black one
Sample carries out pipeline and automatic weighing, facilitates the raising that factory is kneaded production automation degree.
For blocky or sheet rubber, the powdered of rubber only changes the form of rubber, without changing rubber
The fundamental property of glue.Powdered rubber can not only prepare rubber product, be alternatively arranged as modifying agent, be widely used in other field.
With the progress of rubber processing industry, the purposes of powdered rubber is more and more extensive, and demand is increasing, and new varieties and new grades are not
It is disconnected to emerge in large numbers.
The key technology of production powdered rubber is mainly: at powder and isolation.It is former even if becoming pulverized particles at powder rubber
Material is using blocky glue, latex, glue, suspension as base-material.It is divided into comminuting method, spray drying process, expansion drying method, cold at powder method
Freeze seasoning, coacervation, microcapsule method and ionic complexation etc..No matter using the preparation of which kind of method powdered rubber, be both needed into
Row isolation processing, the i.e. surface treatment in powder surface coating interleaving agent and progress appropriateness, have rubber particles and flow freely
Property, it stores, will not agglomerate in transportational process.Common isolation technology mainly has plus interleaving agent, latex grafting, surface chlorination, table
Face crosslinking and crosslinking with radiation etc..Adding interleaving agent is isolation technology used by current most powdered rubber manufacturers.It is isolated former
Reason includes absorption isolation, cladding isolation etc., and common interleaving agent has inorganic interleaving agent and organic interleaving agent, and inorganic interleaving agent has cunning
Mountain flour, calcium carbonate, magnesium silicate, carbon black etc., this kind of interleaving agent is to water sensitive, the powder such as rubber seal contacted to production with metal
Last rubber is not applicable；Organic interleaving agent has polyvinyl chloride, polyvinyl alcohol, polystyrene, styrene-acrylonitrile copolymer etc., this
Though class interleaving agent has compatibility with powdered rubber, need to require difference to be allowed a choice according to product properties.
Either inorganic interleaving agent or organic interleaving agent, have an impact the performance of rubber, especially when interleaving agent is used
When measuring larger.Therefore the development trend of rubber powder is to use interleaving agent less as far as possible under the premise of keeping rubber main performance,
And rubber grain is still able to maintain good fluidity, and can store, transport for long-distance for a long time and adhesion under a load.
Using latex grafting, surface chlorination or surface-crosslinked method, the property of particle surface polymer can be changed, dropped
The viscosity of low polymer is expected to thoroughly solve the problems, such as particle adhesion.
Butadiene-styrene rubber (SBR) is current yield highest in the world, a kind of maximum general purpose synthetic rubber (SR) product of consumption figure
Kind.It can be divided by production technology: emulsion polymerized styrene butadiene rubber (ESBR) and solution polymerized butadiene styrene rubber (SSBR) two major classes.The object of butadiene-styrene rubber
The service performance of mechanical performance, processing performance and product is managed close to natural rubber (NR), abrasion resistance, heat resistance, resistance to ag(e)ing are excellent
In natural rubber, can be used in combination with NR and a variety of SR, tire, footwear, sebific duct, adhesive tape, auto parts and components, wire and cable and
It is had a wide range of applications in other a variety of industrial rubber articles productions.For this purpose, people carry out the pulverizing technology of butadiene-styrene rubber
A large amount of research work, has emerged in large numbers a large amount of patent application.
Currently, the powdered of butadiene-styrene rubber is mainly using styrene-butadiene latex as raw material, pulverizing technology is more mature, skill
Art difficult point is that anti-sticking technology is isolated.It is well known that butadiene-styrene rubber have viscoplasticity and cold flow properties, rubber grain isolation it is bad or
When coating incomplete, easily bonded when product stores and transports.When adding inorganic interleaving agent, although in a short time and quiet
Certain buffer action can be played under the conditions of state, but as storage time increases, rubber particles can gradually deformation；And when transporting, by
It is acted in pitch, rubber particle surface, which is stained with the inorganic particle covered, can also be detached from, both situations can all make rubber granule
The surface of sub- viscosity exposes again, contacts with each other and sticks together, seriously affects the appearance and use of product.
Chinese patent CN105037852A discloses a kind of powder styrene butadiene rubber and preparation method thereof, mainly by butadiene-styrene rubber
Cream, calcium carbonate superfine powder, covering, flocculant, interleaving agent, antioxidant 264 composition, covering uses Coron resin, by Malaysia
Acid anhydrides and styrene are made in the ratio of 7:3.Rubber grain is isolated with Coron resin cladding with calcium carbonate superfine powder, and gained is filled out
It is uniform to fill powder butylbenzene particle, it is prevented from caking.But field is used in the rubber for requiring low filling, which is not applicable.
Chinese patent CN102295815B discloses a kind of preparation side of styrene butadiene rubber grafted isoprene polymer powder
Method, wherein white carbon black content is 20%~30%, and isoprene content is 20%~50%.Since isoprene is grafted to powder
The outside of butylbenzene, formed core-shell structure, when graft latex is condensed, directly using white carbon black as flocculating agent, be not required to addition every
From agent, powder polymer impurity content is less, and mutual adhesion does not occur generally for solidifying particle out, and partial size is easy to control, and quality is equal
It is even.White carbon black is porous material, has biggish specific surface area, increases the specific area of polymer powder, polymer-modified
When compatibility more preferably, so that modified effect is more preferably.Isoprene has preferable resilience, and thermogenesis performance is excellent, so that
Graft polymers powder-product has good damping performance.The technology white carbon black content is up to 20%~30%, and there are still add
Add the problem that dosage is excessively high.And purer butadiene-styrene rubber has larger change to properties of product.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of preparation method of graft powder butadiene-styrene rubber,
Grafted monomers dosage is small, small on the influence of butadiene-styrene rubber performance, and graft powder butadiene-styrene rubber particle obtained is uniform, good fluidity,
Isolation effect is good, and storage stability is good.
The preparation method of graft powder butadiene-styrene rubber of the present invention, steps are as follows:
(1) it sequentially adds water, styrene-butadiene latex, reducing agent aqueous solution in polymeric kettle, grafted monomers and oxidant is added
Premix carries out cross-linking reaction, obtains graft modification styrene-butadiene latex；
(2) firstly, water, anti-aging agent are added in graft modification styrene-butadiene latex, then, flocculating agent is added and is condensed, grain
After son cohesion completely, through centrifugal dehydration, washing, screening, drying, graft powder butadiene-styrene rubber is obtained.
Wherein:
Reducing agent described in step (1) is complexing ferrous salt (EDTAFe) and formaldehyde sodium sulfoxylate (SFS).
The preparation method of reducing agent aqueous solution described in step (1) is as follows: weighing 10 parts of water, is added with stirring 0.2~0.5
Part complexing ferrous salt, adds 0.3~0.8 part of formaldehyde sodium sulfoxylate, dissolves.
Grafted monomers described in step (1) are styrene and acrylonitrile, and the molar ratio of the styrene and acrylonitrile is
1:2~2:1.
In step (1), the oxidant is organic peroxide, preferably isopropyl benzene hydroperoxide, tert-butylperoxy
One or more of hydrogen or di-isopropylbenzene hydroperoxide, more preferable di-isopropylbenzene hydroperoxide (DIP).
In the premix of grafted monomers described in step (1) and oxidant, the mass ratio of grafted monomers and oxidant is 1
~5:0.5~2.
Cross-linking reaction temperature described in step (1) is 30~60 DEG C, and preferably 40~50 DEG C, cross-linking reaction time is 3~5 small
When.
Flocculating agent described in step (2) is divalent or trivalent electrolytic salt, preferably CaCl2、MgCl2, magnesium sulfate, calcium nitrate,
One of magnesium nitrate, aluminium chloride, aluminum nitrate, aluminum sulfate and above-mentioned substance and the mixture of hydrochloric acid, sulfuric acid or acetic acid are several
Kind, more preferable CaCl2。
Anti-aging agent described in step (2) is the general anti-aging agent of rubber, preferably antioxidant 4010, antioxidant 264, anti-aging agent
One or more of 2264 or anti-aging agent LDTP1076.
Step is slowly added to flocculating agent in (2), is preferably added in 5~15 minutes.
The preparation method of the graft powder butadiene-styrene rubber, specific as follows:
(1) reducing agent aqueous solution is prepared:
10 parts of water are weighed, 0.2~0.5 part of complexing ferrous salt is added with stirring, adds 0.3~0.8 part of formaldehyde sodium sulfoxylate, be allowed to
Dissolution；
(2) premixing of grafted monomers and oxidant:
1~5 part of grafted monomers and 0.5~2 part of oxidant are pre-mixed uniformly；Grafted monomers are styrene and acrylonitrile
Mixture, the molar ratio of styrene and acrylonitrile is 1:2~2:1；
(3) latex is crosslinked:
50~150 parts of deionized waters are first added in polymeric kettle, then 100 parts of styrene-butadiene latexes are added under stiring, nitrogen is set
After changing, the reducing agent aqueous solution that step (1) is prepared is added, grafted monomers and oxygen made from step (2) is added after stirring 30 minutes
The premix of agent is warming up to 30~60 DEG C, reacts 3~5 hours, and graft modification styrene-butadiene latex is made；
(4) condensation powdering:
Firstly, 100 parts of graft modification styrene-butadiene latexes are added in condensing fields, 30~80 parts of water are added, add 0.2~
0.6 part of anti-aging agent is added flocculating agent and is condensed, after particle coacervation is complete, 70~100 under 50~80 DEG C of condensation temperatures
20~30min is stirred at DEG C to be cured, and then through centrifugal dehydration, washing, screening, drying, obtains graft powder butadiene-styrene rubber.
The styrene-butadiene latex is SBR1502, solid content 20%.
The condensation temperature is preferably 60~70 DEG C.Flocculating agent is preferably added in 5~15 minutes.
The curing temperature is preferably 80~90 DEG C.
Graft powder butadiene-styrene rubber prepared by the present invention, appearance be it is white or yellowish, 0.40~1.00mm of granularity is waved
Hair point≤1.0%.Product particle is uniform, good fluidity, and storage stability is good
Compared with prior art, the present invention having the following beneficial effects:
1, the present invention provides a kind of preparation methods of the powder styrene butadiene rubber of surface graft modification, by styrene-butadiene latex
Emulsion particle surface makes a small amount of plasticity monomer be graft-polymerized, and forms the emulsion particle of core-shell structure, and stratum nucleare is butadiene-styrene rubber, shell
For non-viscous resin copolymer.Different from the Coron resin technique for packing of CN105037852, since resin is with chemical bonded refractory
Close on emulsion particle, and graft polymers steric hindrance is larger, with the butadiene-styrene rubber of stratum nucleare ining conjunction with it is more secured, be distributed more
Be it is uniform, cladding isolation effect it is more preferable, the stability of product is not influenced by storage and transportation conditions, at room temperature store 6
Month adhesion, good fluidity.Since grafted monomers dosage is smaller, graft polymers is only thinly distributed in emulsion particle surface
On, butadiene-styrene rubber performance is influenced little.The glass transition temperature of product can also be improved to a certain extent when as modifying agent.
2, graft modification powder styrene butadiene rubber product prepared by the present invention, partial size account for 90% or more less than 0.9mm's, product
Particle is uniform, good fluidity.
Specific embodiment
The present invention is further illustrated below with reference to embodiment, but the not range of limitation the claims in the present invention protection.
Embodiment 1
The preparation of reducing agent aqueous solution: weighing 10 parts of water, is added with stirring 0.5 part of complexing ferrous salt, adds 0.8 part and hang
White powder, dissolution.
1000g deionized water, 1000g styrene-butadiene latex (SBR1502) are added in 10L polymeric kettle, nitrogen charging displaced air adds
Enter 102g reducing agent aqueous solution, stir half an hour, the mixed liquor 40g of grafted monomers and DIP is added, is warming up to 50 DEG C, reaction 4 is small
When, graft modification styrene-butadiene latex is made.
Grafted monomers are the mixture of styrene and acrylonitrile, and the molar ratio between styrene and acrylonitrile is 1:2.
The mass ratio of grafted monomers and DIP are 1:0.5.
Graft modification styrene-butadiene latex is moved into 10L condensing field, stirring is lower to add water 300g, 5g antioxidant 4010 is added,
70 DEG C are warming up to, 10% calcium chloride solution is slowly added into, until micelle is precipitated completely.70 DEG C are then heated to, is cured 30 minutes
Discharging.
Complete graft SBR water slurry will be agglomerated to discharge to storage tank, be dehydrated in batches with centrifuge, washing is three times
It is sieved afterwards with 0.9mm, then sieves further screening with 0.45mm.It is that 99%, 0.45mm sieve is sieved through that 0.9mm, which is sieved through rate,
Rate 95%.
Rubber grain after screening is dried in vacuo, 80 DEG C of drying temperature of control or less.To water content reach 1% with
When lower, cooling is taken out.Obtain the graft powder butadiene-styrene rubber of good fluidity.
Embodiment 2
The preparation of reducing agent aqueous solution: weighing 10 parts of water, is added with stirring 0.2 part of complexing ferrous salt, adds 0.5 part and hang
White powder, dissolution.
1000g deionized water, 1000g styrene-butadiene latex (SBR1502) are added in 10L polymeric kettle, nitrogen charging displaced air adds
Enter 130g reducing agent aqueous solution, stir half an hour, the mixed liquor 70g of grafted monomers and DIP is added, is warming up to 30 DEG C, reaction 5 is small
When, graft modification styrene-butadiene latex is made.
Grafted monomers are the mixture of styrene and acrylonitrile, and the molar ratio between styrene and acrylonitrile is 1:2.
The mass ratio of grafted monomers and DIP are 1:2.
Graft modification styrene-butadiene latex is moved into 10L condensing field, stirring is lower to add water 500g, 5g antioxidant 4010 is added,
70 DEG C are warming up to, 10% calcium chloride solution is slowly added into, until micelle is precipitated completely.70 DEG C are then heated to, is cured 30 minutes
Discharging.
Complete graft SBR water slurry will be agglomerated to discharge to storage tank, be dehydrated in batches with centrifuge, washing is three times
It is sieved afterwards with 0.9mm, then sieves further screening with 0.45mm.It is that 99%, 0.45mm sieve is sieved through that 0.9mm, which is sieved through rate,
Rate 90%.
Rubber grain after screening is dried in vacuo, 80 DEG C of drying temperature of control or less.To water content reach 1% with
When lower, cooling is taken out.Obtain the graft powder butadiene-styrene rubber of good fluidity.
Embodiment 3
The preparation of reducing agent aqueous solution: weighing 10 parts of water, is added with stirring 0.4 part of complexing ferrous salt, adds 0.6 part and hang
White powder, dissolution.
1000g deionized water, 1000g styrene-butadiene latex (SBR1502) are added in 10L polymeric kettle, nitrogen charging displaced air adds
Enter 50g reducing agent aqueous solution, stir half an hour, the mixed liquor 15g of grafted monomers and DIP is added, is warming up to 60 DEG C, reaction 3 is small
When, graft modification styrene-butadiene latex is made.
Grafted monomers are the mixture of styrene and acrylonitrile, and the molar ratio between styrene and acrylonitrile is 2:1.
The mass ratio of grafted monomers and DIP are 5:0.5.
Graft modification styrene-butadiene latex is moved into 10L condensing field, stirring is lower to add water 100g, adds 5g antioxidant 264, rises
Temperature is slowly added into 10% calcium chloride solution to 70 DEG C, until micelle is precipitated completely.70 DEG C are then heated to, is gone out within curing 30 minutes
Material.
Complete graft SBR water slurry will be agglomerated to discharge to storage tank, be dehydrated in batches with centrifuge, washing is three times
It is sieved afterwards with 0.9mm, then sieves further screening with 0.45mm.It is that 99%, 0.45mm sieve is sieved through that 0.9mm, which is sieved through rate,
Rate 92%.
Rubber grain after screening is dried in vacuo, 80 DEG C of drying temperature of control or less.To water content reach 1% with
When lower, cooling is taken out.Obtain the graft powder butadiene-styrene rubber of good fluidity.
Embodiment 4
The preparation of reducing agent aqueous solution: weighing 10 parts of water, is added with stirring 0.5 part of complexing ferrous salt, adds 0.8 part and hang
White powder, dissolution.
1000g deionized water, 1000g styrene-butadiene latex (SBR1502) are added in 10L polymeric kettle, nitrogen charging displaced air adds
Enter 102g reducing agent aqueous solution, stir half an hour, the mixed liquor 40g of grafted monomers and isopropyl benzene hydroperoxide is added, is warming up to
It 40 DEG C, reacts 4 hours, graft modification styrene-butadiene latex is made.
Grafted monomers are the mixture of styrene and acrylonitrile, and the molar ratio between styrene and acrylonitrile is 1:2.
The mass ratio of grafted monomers and isopropyl benzene hydroperoxide is 1:0.5.
Graft modification styrene-butadiene latex is moved into 10L condensing field, stirring is lower to add water 300g, 5g anti-aging agent 2264 is added,
70 DEG C are warming up to, 10% liquor alumini chloridi is slowly added into, until micelle is precipitated completely.70 DEG C are then heated to, is cured 30 minutes
Discharging.
Complete graft SBR water slurry will be agglomerated to discharge to storage tank, be dehydrated in batches with centrifuge, washing is three times
It is sieved afterwards with 0.9mm, then sieves further screening with 0.45mm.It is that 99%, 0.45mm sieve is sieved through that 0.9mm, which is sieved through rate,
Rate 95%.
Rubber grain after screening is dried in vacuo, 80 DEG C of drying temperature of control or less.To water content reach 1% with
When lower, cooling is taken out.Obtain the graft powder butadiene-styrene rubber of good fluidity.
Embodiment 5
The preparation of reducing agent aqueous solution: weighing 10 parts of water, is added with stirring 0.2 part of complexing ferrous salt, adds 0.5 part and hang
White powder, dissolution.
1000g deionized water, 1000g styrene-butadiene latex (SBR1502) are added in 10L polymeric kettle, nitrogen charging displaced air adds
Enter 130g reducing agent aqueous solution, stir half an hour, the mixed liquor 70g of grafted monomers and t-butyl hydrogen peroxide is added, is warming up to
It 45 DEG C, reacts 3.5 hours, graft modification styrene-butadiene latex is made.
Grafted monomers are the mixture of styrene and acrylonitrile, and the molar ratio between styrene and acrylonitrile is 1:2.
The mass ratio of grafted monomers and t-butyl hydrogen peroxide is 1:2.
Graft modification styrene-butadiene latex is moved into 10L condensing field, stirring is lower to add water 500g, adds 5g anti-aging agent
LDTP1076 is warming up to 70 DEG C, is slowly added into 10% aluminum sulfate solution, until micelle is precipitated completely.Then heat to 70 DEG C, it is ripe
Change 30 minutes and discharges.
Complete graft SBR water slurry will be agglomerated to discharge to storage tank, be dehydrated in batches with centrifuge, washing is three times
It is sieved afterwards with 0.9mm, then sieves further screening with 0.45mm.It is that 99%, 0.45mm sieve is sieved through that 0.9mm, which is sieved through rate,
Rate 90%.
Rubber grain after screening is dried in vacuo, 80 DEG C of drying temperature of control or less.To water content reach 1% with
When lower, cooling is taken out.Obtain the graft powder butadiene-styrene rubber of good fluidity.
The graft powder butadiene-styrene rubber of embodiment 1-5 preparation stores 6 months adhesions, good fluidity at room temperature.
Claims (10)
1. a kind of preparation method of graft powder butadiene-styrene rubber, it is characterised in that: steps are as follows:
(1) water, styrene-butadiene latex, reducing agent aqueous solution are sequentially added in polymeric kettle, then, grafted monomers and oxidant are added
Premix carries out cross-linking reaction, obtains graft modification styrene-butadiene latex；
(2) firstly, water, anti-aging agent are added in graft modification styrene-butadiene latex, then, flocculating agent is added and is condensed, particle is solidifying
After gathering completely, through centrifugal dehydration, washing, screening, drying, graft powder butadiene-styrene rubber is obtained.
2. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: described in step (1)
The preparation method of reducing agent aqueous solution is as follows: weighing 10 parts of water, is added with stirring 0.2~0.5 part of complexing ferrous salt, adds
0.3~0.8 part of formaldehyde sodium sulfoxylate, dissolution.
3. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: described in step (1)
Grafted monomers are styrene and acrylonitrile, and the molar ratio of styrene and acrylonitrile is 1:2~2:1.
4. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: described in step (1)
Oxidant is organic peroxide.
5. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: described in step (1)
In the premix of grafted monomers and oxidant, the mass ratio of grafted monomers and oxidant is 1~5:0.5~2.
6. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: described in step (1)
Cross-linking reaction temperature is 30~60 DEG C, and cross-linking reaction time is 3~5 hours.
7. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: step (1) are as follows: poly-
It closes in kettle and 50~150 parts of deionized waters is first added, then 100 parts of styrene-butadiene latexes are added under stiring, after being replaced with nitrogen, be added also
Former agent aqueous solution after stirring, is added the premix of grafted monomers and oxidant, is warming up to 30~60 DEG C, reacts 3~5 hours,
Graft modification styrene-butadiene latex is made.
8. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: described in step (2)
Flocculating agent is divalent or trivalent electrolytic salt.
9. the preparation method of graft powder butadiene-styrene rubber according to claim 1, it is characterised in that: step (2) are as follows: first
First, 100 parts of graft modification styrene-butadiene latexes are added in condensing field, 30~80 parts of water are added, add 0.2~0.6 part of anti-aging agent,
Under 50~80 DEG C of condensation temperatures, be added flocculating agent be condensed, after particle coacervation is complete, curing, then through centrifugal dehydration, wash
It washs, sieve, dry, obtain graft powder butadiene-styrene rubber.
10. the preparation method of graft powder butadiene-styrene rubber according to claim 9, it is characterised in that: the flocculating agent
It is added in 5~15 minutes；The curing is to stir 20~30min at 70~100 DEG C to be cured.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109929259A (en) * | 2019-04-17 | 2019-06-25 | 山东显元化工研究院有限公司 | A kind of SBR butadiene-styrene rubber asphalt modifier and preparation method thereof |
| CN110003672A (en) * | 2019-04-17 | 2019-07-12 | 山东显元化工研究院有限公司 | A kind of SBR styrene butadiene rubber modified asphalt and preparation method thereof |
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| US4374941A (en) * | 1981-08-27 | 1983-02-22 | The Goodyear Tire & Rubber Company | Particle size control of SBR/carbon black powder |
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| CN110003672A (en) * | 2019-04-17 | 2019-07-12 | 山东显元化工研究院有限公司 | A kind of SBR styrene butadiene rubber modified asphalt and preparation method thereof |
| CN109929259B (en) * | 2019-04-17 | 2021-06-04 | 山东显元化工研究院有限公司 | SBR (styrene butadiene rubber) asphalt modifier and preparation method thereof |
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