CN108384260A - A kind of weatherability improvement pitch and its preparation process, application - Google Patents
A kind of weatherability improvement pitch and its preparation process, application Download PDFInfo
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- CN108384260A CN108384260A CN201810233690.3A CN201810233690A CN108384260A CN 108384260 A CN108384260 A CN 108384260A CN 201810233690 A CN201810233690 A CN 201810233690A CN 108384260 A CN108384260 A CN 108384260A
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- pitch
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- weatherability
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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
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
- Working-Up Tar And Pitch (AREA)
Abstract
The invention belongs to pitch preparing technical fields, more particularly to a kind of weatherability improves pitch and its preparation process, application, wherein weatherability improvement pitch includes coal tar pitch, modifying agent, plasticizer, thinner, stabilizer and activator, the softening point range of the wherein described coal tar pitch is 102 110 DEG C, coking value ranging from 59.20 62.50%, β resin contents ranging from 19.50 22.35%.The present invention achievees the purpose that prepare weatherability improvement pitch by way of adding modifying agent, plasticizer, thinner, stabilizer and activator in coal tar pitch.The present invention has preparation process simple and effective, and gained improves the advantage that comprehensive performance is good under pitch good weatherability and a variety of use environments.
Description
Technical field
The invention belongs to pitch preparing technical field more particularly to a kind of improvement of weatherability pitch and its preparation process, answer
With.
Background technology
Traditional SBS improves pitch, refers to the improvement obtained after SBS copolymers and plain asphalt are stirred by one kind
Pitch generally has resistance to compression, antistripping ability strong, and whole durable advantage.On the other hand, existing improvement pitch is resistance to
Time property aspect just seems insufficient, therefore leverages its using effect, so being badly in need of that a weatherability is good to be changed in the market
Good pitch.
Patent publication No. is CN101423765A, and publication date discloses a kind of resistance to for the Chinese invention patent of 2009.05.06
Long pitch and preparation method thereof., include the following steps：1) coal of 1~7 mass parts and the residual oil of 9~3 mass parts are added anti-
It answers and carries out hydrogenation reaction in container, after removing gas, obtain residue A；2) residue A is distilled, after removing gas,
Residue B is obtained, residue B is durable asphalt.The important feature of the present invention：1) it is raw material to use residual oil and coal, is utilized
Pitch possessed by coal and residual oil is dived component；2) it is to pass through under the catalyst action of specific conditions of mixture ratios and specified type
Add hydrogen, the active component of influence asphalt durability is made to be saturated；3) it is to remove the small molecule component of desaturation by distillation technique, make
Pitch restores the component compatibility and physicochemical properties of application.
But the pitch prepared in the patent of invention, it asks there are weatherability is poor and preparation process is complicated, difficulty is big
Topic.
Invention content
The object of the present invention is to provide a kind of weatherability improvement pitch and its preparation process, applications, can be by being dripped in coal
The mode of addition modifying agent, plasticizer, thinner, stabilizer and activator in green reaches and prepares weatherability improvement pitch
Purpose.The present invention has preparation process simple and effective, and gained is improved comprehensive under pitch good weatherability and a variety of use environments
The good advantage of energy.
The present invention solve the above problems the technical solution adopted is that：A kind of weatherability improvement pitch, including coal tar pitch, improvement
Agent, plasticizer, thinner, stabilizer and activator, wherein the softening point range of the coal tar pitch is 102-110 DEG C, coking
It is worth ranging from 59.20-62.50%, β resin contents ranging from 19.50-22.35%.
In the present invention, the plasticizer and thinner, for being pointedly 102-110 DEG C to softening point range
Coal tar pitch carries out plasticising viscosity reduction so that before adding the stabilizer and activator, the semi-finished product for improveing pitch just have
Use intensity is big, and the characteristics of conveniently combined with the activator.
On the other hand, in the coal tar pitch, when coking value and too low β resin contents, the coal tar pitch is melted in heating
When be susceptible to the non-uniform problem of heating, and when coking value and excessively high β resin contents, but can make coal tar pitch with it is follow-up living
The low problem of the combination speed of agent, combination degree, so in the present invention, the selection to the coal tar pitch is also one of key.
Further preferred technical solution is：The modifying agent is type SBS and one kind in star-shaped sbs or two
Kind mixture；The plasticizer is one or both of stearic acid and Stearyl Amine mixture；The thinner is fluosilicic
Class thinner；The stabilizer is one or more mixing in benzoyl oxide, phthalic anhydride and maleic anhydride
Object；The activator is crumb rubber activation agent.
In the present invention, the modifying agent is for ensureing basic improved effect, the plasticizer and thinner collocation
It uses so that the plasticizer has plasticization effect good, and the advantage that usage amount is low, wherein usage amount are lower, can more ensure
The stable homogeneous of finally obtained improvement pitch.
In addition, the activator ensures quick, effective improved, process of modifying agent, finally surely for activating asphalt component
Agent is determined in improvement end, carry out any of the above ingredient to stablize protection, ensures the stabilization of improvement each performance of pitch.
Further preferred technical solution is by weight percentage, including following components：
Coal tar pitch, 88-92%；
Type SBS, 3-9%；
Stearic acid, 0.1-0.5%；
Fluosilicic class thinner, 0.5-1.5%；
Phthalic anhydride, 0.1-0.5%；
Crumb rubber activation agent, 1-6%.
Further preferred technical solution is by weight percentage, including following components：
Coal tar pitch, 89%；
Type SBS, 5%；
Stearic acid, 0.5%；
Fluosilicic class thinner, 1.5%；
Phthalic anhydride, 0.5%；
Crumb rubber activation agent, 3.5%.
A kind of preparation process of weatherability improvement pitch, includes the following steps successively：
S1, heating melting：The coal tar pitch is heated to molten condition；
S2, improvement grinding：The various arch types SBS in the melting coal tar pitch of step S1, and grinding is sheared, before obtaining improvement pitch
Body；
S3, plasticising development：Stearic acid, and heating stirring is added in the improvement pitch precursor of step S2, obtains improvement pitch the
One development body；
S4, viscosity reduction development：Fluosilicic class thinner is added portionwise in the improvement pitch first of step S3 develops body, and cools down and stirs
It mixes, obtains improvement pitch second and develop body；
S5, improvement development：Phthalic anhydride and crumb rubber activation is successively added in the improvement pitch second of step S4 develops body
Agent, and heating stirring obtain finished product improvement pitch.
In the present invention, five kinds of additives add successively, and wherein type SBS is preferential to add as improved additives basis
To ensure basic improved effect, and the stearic acid is used cooperatively with the fluosilicic class thinner so that the stearic acid tool
There is the advantage that speedup effect is good and usage amount is few, farthest ensure that the globality of the improvement pitch, be finally adjacent
Phthalate anhydride and crumb rubber activation agent, it is final that the viscosity, needle penetration, aging of pitch group are prolonged as improved, process end
Degree and isolation situation are preferable, ensure the use of improvement pitch so that the pitch in the present invention has the advantages that good weatherability.
Further preferred technical solution is in step S5 that the preparation method of the crumb rubber activation agent is：Shoddy mistake
80 mesh sieve, and are uniformly mixed with heavy oil, and heated at constant temperature is dehydrated under the conditions of 75 DEG C, 6h, and crumb rubber activation agent is made.
Crumb rubber activation agent in the present invention is mixed by shoddy and heavy-oil heating, for being handed over pitch group
Connection, the use intensity for substantially increasing improvement pitch improve preparation efficiency and at the same time reducing development time.
Further preferred technical solution is：Step S1, the heating temperature in S2 is 125-138 DEG C, in step S3
Heating temperature is 165-190 DEG C, and the heating temperature in step S4 is 145-156 DEG C, and the heating temperature in step S5 is 145-150
℃。
In the present invention, step S3 is plasticising growth course, is combined for plasticizer and tentatively improvement pitch
Reaction improves pitch entirety using effect and is susceptible to the low problem of plasticising degree when plasticizing reaction process is long, so
The present invention carries out plasticizing reaction by the way of " high-order, in short-term ".On the other hand, step S1, in S2 in it is preliminary for type SBS
Improvement fusion, so temperature is relatively low, and step S5 is compared to step S4, due to the phthalic anhydride and crumb rubber activation
The inadequate reason of agent stability itself carries out reaction mixing using cooling method, to ensure to have on the basis of stabilization and activation
Have the advantages that substance itself is stablized, it is final to have good weatherability and use intensity big so that improveing pitch, it is easy to use excellent
Point.
Further preferred technical solution is：Pitch first is improved described in step S3 and is developed after prepared by body develops 1.5-
2.5h；Pitch second is improved described in step S4 and is developed after prepared by body develops 3.5-4.0h.
In the present invention, it is that fluosilicic class thinner strengthens front plasticization effect by viscosity reduction mode in step S4, so hair
Educating the time will grow, to ensure that viscosity reduction operation is carried out completely.
Further preferred technical solution is：In step S4, the amount of the fluosilicic class thinner be after three parts successively
It is added, wherein interval time is 0.5-1.0h, ensures that the entire viscosity reduction growth course time is 4.5-6.5h；In step S5,
After the phthalic anhydride stirs evenly, interval 1.5-2.0h adds the crumb rubber activation agent again, and ensures entire described
The improvement growth course time is 5-7.5h.
In the present invention, if the fluosilicic class thinner is all easy with all being added in this all addition or short time
Viscosity reduction is caused to operate halfway problem, so the interval of setting 0.5-1.0h, to ensure that operation is completed.
A kind of application of weatherability improvement pitch, application of the weatherability improvement pitch when roadbed is laid with.
In the present invention, roadbed laying pitch uses pitch compared to other buildings, has intensity requirement higher, weather-proof
Property require higher the characteristics of, the present invention in improvement pitch then have the advantages that completely it is upward.
The present invention by way of adding modifying agent, plasticizer, thinner, stabilizer and activator in coal tar pitch,
Achieve the purpose that prepare weatherability improvement pitch.The present invention has preparation process simple and effective, and gained improves pitch good weatherability,
And the good advantage of comprehensive performance under a variety of use environments.
Specific implementation mode
As described below is only presently preferred embodiments of the present invention, non-to be defined to the scope of the present invention.
Embodiment 1
S1, heating melting：89kg coal tar pitch is first added in heating kettle, be heated to 125 DEG C and keeps, stirring melts the coal drip
It is green；
S2, improvement grinding：5kg type SBSs are added in heating kettle, and are stirred evenly, and during which temperature is maintained at 125 DEG C not
Become；
S3, plasticising development：0.5kg stearic acid is added in heating kettle, then heat to 170 DEG C and is kept, after stirring evenly
Stand development 1.5h；
S4, viscosity reduction development：1.5kg fluosilicic class thinners are divided into three parts, wherein second part, third part 0.5h is added at the former
After reheat, the temperature of fluosilicic class thinner heating kettle when being added is 150 DEG C, last a fluosilicic class viscosity reduction
Agent stands development 3.5h after stirring evenly；
S5, improvement development：The crumb rubber activation agent of phthalic anhydride and 3.5kg of 0.5kg is sequentially added in heating kettle simultaneously
147 DEG C are cooled to, is mixed, wherein 1.5h of the crumb rubber activation agent after the stirring of phthalic acid anhydride component adds again
Enter, finally heat preservation stands development, obtains finished product weatherability improvement pitch.
The pitch obtained in the present embodiment is laid with for roadbed, follow-up performance test is carried out to facilitate, it is comprehensive to embody its
Close the advantage that performance is good and weatherability is especially prominent.
Embodiment 2
S1, heating melting：90kg coal tar pitch is first added in heating kettle, be heated to 130 DEG C and keeps, stirring melts the coal drip
It is green；
S2, improvement grinding：4kg type SBSs are added in heating kettle, and are stirred evenly, and during which temperature is maintained at 130 DEG C not
Become；
S3, plasticising development：0.5kg stearic acid is added in heating kettle, then heat to 175 DEG C and is kept, after stirring evenly
Stand development 2.0h；
S4, viscosity reduction development：1.5kg fluosilicic class thinners are divided into three parts, wherein second part, third part 0.5h is added at the former
After reheat, the temperature of fluosilicic class thinner heating kettle when being added is 152 DEG C, last a fluosilicic class viscosity reduction
Agent stands development 3.5h after stirring evenly；
S5, improvement development：The crumb rubber activation agent of phthalic anhydride and 3.5kg of 0.5kg is sequentially added in heating kettle simultaneously
148 DEG C are cooled to, is mixed, wherein 2.0h of the crumb rubber activation agent after the stirring of phthalic acid anhydride component adds again
Enter, finally heat preservation stands development, obtains finished product weatherability improvement pitch.
Embodiment 3
S1, heating melting：89kg coal tar pitch is first added in heating kettle, be heated to 135 DEG C and keeps, stirring melts the coal drip
It is green；
S2, improvement grinding：4kg type SBSs are added in heating kettle, and are stirred evenly, and during which temperature is maintained at 135 DEG C not
Become；
S3, plasticising development：0.5kg stearic acid is added in heating kettle, then heat to 180 DEG C and is kept, after stirring evenly
Stand development 2.5h；
S4, viscosity reduction development：1.5kg fluosilicic class thinners are divided into three parts, wherein second part, third part 0.5h is added at the former
After reheat, the temperature of fluosilicic class thinner heating kettle when being added is 155 DEG C, last a fluosilicic class viscosity reduction
Agent stands development 4.0h after stirring evenly；
S5, improvement development：The crumb rubber activation agent of phthalic anhydride and 4.5kg of 0.5kg is sequentially added in heating kettle simultaneously
150 DEG C are cooled to, is mixed, wherein 2.0h of the crumb rubber activation agent after the stirring of phthalic acid anhydride component adds again
Enter, finally heat preservation stands development, obtains finished product weatherability improvement pitch.
The pitch obtained in the present embodiment is laid with for roadbed, follow-up performance test is carried out to facilitate, it is comprehensive to embody its
Close the advantage that performance is good and weatherability is especially prominent.
Performance test
Pitch obtained in above-described embodiment 1,2,3 is tested for the property, test result is as follows：
As can be seen from the above table：
First, obtained pitch in the embodiment of the present invention, synthesis performance is good；
Second, in terms of weatherability, elasticity is restored data and is measured after a period of use in pitch in the present embodiment, and during which pitch passes through
It is illuminated by the light, the tests such as cold and hot and wind and rain, still there is comparatively ideal elasticity to restore data, this can be proved in the present invention
Pitch is improved compared to existing improvement pitch, is had compared with high-weatherability.
Embodiments of the present invention are explained in detail above, but the present invention is not limited to the above embodiments, in institute
It states technical field those of ordinary skill within the scope of knowledge, can also make without departing from the purpose of the present invention
Various modifications.These are all without creative modification, as long as all by Patent Law in scope of the presently claimed invention
Protection.
Claims (10)
1. a kind of weatherability improves pitch, it is characterised in that：Including coal tar pitch, modifying agent, plasticizer, thinner, stabilizer with
And activator, wherein the softening point range of the coal tar pitch is 102-110 DEG C, coking value ranging from 59.20-62.50%, β resins
Content range is 19.50-22.35%.
2. a kind of weatherability according to claim 1 improves pitch, it is characterised in that：The modifying agent is type SBS, with
And one or both of star-shaped sbs mixture；The plasticizer is that one or both of stearic acid and Stearyl Amine are mixed
Close object；The thinner is fluosilicic class thinner；The stabilizer is benzoyl oxide, phthalic anhydride and maleic two
One or more mixtures in acid anhydrides；The activator is crumb rubber activation agent.
3. a kind of weatherability according to claim 2 improves pitch, it is characterised in that by weight percentage, including with the following group
Point：
Coal tar pitch, 88-92%；
Type SBS, 3-9%；
Stearic acid, 0.1-0.5%；
Fluosilicic class thinner, 0.5-1.5%；
Phthalic anhydride, 0.1-0.5%；
Crumb rubber activation agent, 1-6%.
4. a kind of weatherability according to claim 2 improves pitch, it is characterised in that by weight percentage, including with the following group
Point：
Coal tar pitch, 89%；
Type SBS, 5%；
Stearic acid, 0.5%；
Fluosilicic class thinner, 1.5%；
Phthalic anhydride, 0.5%；
Crumb rubber activation agent, 3.5%.
5. a kind of preparation process of weatherability improvement pitch as claimed in claim 2, it is characterised in that include following step successively
Suddenly：
S1, heating melting：The coal tar pitch is heated to molten condition；
S2, improvement grinding：The various arch types SBS in the melting coal tar pitch of step S1, and grinding is sheared, before obtaining improvement pitch
Body；
S3, plasticising development：Stearic acid, and heating stirring is added in the improvement pitch precursor of step S2, obtains improvement pitch the
One development body；
S4, viscosity reduction development：Fluosilicic class thinner is added portionwise in the improvement pitch first of step S3 develops body, and cools down and stirs
It mixes, obtains improvement pitch second and develop body；
S5, improvement development：Phthalic anhydride and crumb rubber activation is successively added in the improvement pitch second of step S4 develops body
Agent, and heating stirring obtain finished product improvement pitch.
6. a kind of preparation process of weatherability improvement pitch according to claim 5, it is characterised in that described in step S5
The preparation method of crumb rubber activation agent is：Shoddy crosses 80 mesh sieve, is uniformly mixed with heavy oil, the constant temperature under the conditions of 75 DEG C, 6h
Crumb rubber activation agent is made in thermal dehydration.
7. a kind of preparation process of weatherability improvement pitch according to claim 5, it is characterised in that：Step S1, in S2
Heating temperature be 125-138 DEG C, the heating temperature in step S3 is 165-190 DEG C, and the heating temperature in step S4 is 145-
156 DEG C, the heating temperature in step S5 is 145-150 DEG C.
8. a kind of preparation process of weatherability improvement pitch according to claim 5, it is characterised in that：Described in step S3
Improvement pitch first develops after prepared by body and develops 1.5-2.5h；Pitch second is improved described in step S4 and is developed after prepared by body develops
3.5-4.0h。
9. a kind of preparation process of weatherability improvement pitch according to claim 5, it is characterised in that：In step S4, institute
The amount for stating fluosilicic class thinner is to sequentially add after three parts, and wherein interval time is 0.5-1.0h, ensures the entire viscosity reduction
The growth course time is 4.5-6.5h；In step S5, after the phthalic anhydride stirs evenly, interval 1.5-2.0h is added again
The crumb rubber activation agent, and ensure that the entire improvement growth course time is 5-7.5h.
10. a kind of application of weatherability improvement pitch as described in claim 1, it is characterised in that：The weatherability improvement drip
Application of the blueness when roadbed is laid with.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810233690.3A CN108384260A (en) | 2018-03-21 | 2018-03-21 | A kind of weatherability improvement pitch and its preparation process, application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810233690.3A CN108384260A (en) | 2018-03-21 | 2018-03-21 | A kind of weatherability improvement pitch and its preparation process, application |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110746788A (en) * | 2019-11-08 | 2020-02-04 | 同济大学 | High-solubility rubber powder modified asphalt and preparation method thereof |
| CN111138657A (en) * | 2019-12-30 | 2020-05-12 | 温州大学 | Terpolymer resin |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101781469A (en) * | 2009-12-08 | 2010-07-21 | 重庆市智翔铺道技术工程有限公司 | Polymer composite modified asphalt |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110746788A (en) * | 2019-11-08 | 2020-02-04 | 同济大学 | High-solubility rubber powder modified asphalt and preparation method thereof |
| CN111138657A (en) * | 2019-12-30 | 2020-05-12 | 温州大学 | Terpolymer resin |
| CN111138657B (en) * | 2019-12-30 | 2022-09-09 | 温州大学 | Terpolymer resin |
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Application publication date: 20180810 |