CN101397358B - Method for preparing modified asphalt - Google Patents
Method for preparing modified asphalt Download PDFInfo
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- CN101397358B CN101397358B CN2008101550982A CN200810155098A CN101397358B CN 101397358 B CN101397358 B CN 101397358B CN 2008101550982 A CN2008101550982 A CN 2008101550982A CN 200810155098 A CN200810155098 A CN 200810155098A CN 101397358 B CN101397358 B CN 101397358B
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- asphalt
- pitch
- modified asphalt
- unsaturated double
- bond compounds
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Abstract
The invention discloses a preparation method of modified asphalt. The modified asphalt is produced by asphalt and an undersaturation double bond compound which are reacted under the action of an evocating agent; the method comprises the following steps: firstly, the asphalt is put into a reaction kettle; the evocating agent is added into the reaction kettle; the weight of the evocating agent is 0.05-1 percent of the weight of the asphalt; the undersaturation double bond compound with the weight of 1-10 percent of that of the asphalt and 0.1-1 percent of N-phenyl maleimide are added into the reaction kettle at the temperature of 80-160 DEG C; and the pressure remains 0.1-0.4 MPa. The reaction is carried out for 3-6 hours; the reaction product is deaerated and filtered, and then the modified asphalt is obtained. The chemically modified asphalt provided by the method has good performance, which greatly improves the shortcomings that the common asphalt has strong temperature sensibility, low viscosity, poor flexility and the like. The modified asphalt can meet the use performance of roads and prolong the service life of roads; when the modified asphalt is used in road maintaining, maintenance, the time of traffic closing is shortened, the construction condition is improved and the construction efficiency is increased.
Description
Technical field
The present invention relates to a kind of modified asphalt preparation method, belong to the pitch chemical modification technique.
Background technology
Pitch is widely used in road pavement, pavement maintenance and maintenance, compares with cement concrete pavement, and bituminous pavement has advantages such as no seam, driving is comfortable, vibration is little, noise is low.But plain asphalt is strong to temperature sensitivity, viscosity is low, snappiness is poor, has brought many inconvenience to use.In order to overcome the shortcoming of plain asphalt, both at home and abroad asphalt modification to be studied, modifying asphalt is to add properties-correcting agent in pitch, and the performance of pitch or asphalt is improved.Wherein, properties-correcting agent mostly is: rubber, resin, high molecular polymer, levigated rubber powder or other fillers etc.The shortcoming of this asphalt modification method is: carry out physical blending in the pitch owing to just simply properties-correcting agent is added, thereby the easy stratified problem of segregation that produces, though and for problems such as bituminous is strong to temperature sensitivity, viscosity is low, snappiness differences improvement is arranged, the not basic change from the molecular structure.
Summary of the invention
In order to overcome the problem that existing modifying asphalt exists, the purpose of this invention is to provide a kind of modified asphalt preparation method, this preparation method directly carries out chemical modification with plain asphalt, and the chemical modified bitumen that makes can satisfy the road use properties, prolongs road work-ing life.
The objective of the invention is to be achieved through the following technical solutions:
A kind of modified asphalt preparation method is characterized in that it under the initiator effect, with the reaction of pitch and unsaturated double-bond compounds and make, comprises the steps:
1. pitch is dropped in the reactor.Described pitch can be one or more mixtures in petroleum pitch, oxidized bitumen, coal-tar pitch or the lake pitch, is preferably petroleum pitch.
2. in aforesaid reaction vessel, add initiator; The weight of initiator is bituminous 0.05～1%.Described initiator is one or more mixtures in Potassium Persulphate, ammonium persulphate, benzoyl peroxide, Diisopropyl azodicarboxylate, the azo-bis-iso-dimethyl.
3. add unsaturated double-bond compounds and 0.1～1%N-phenyl maleimide of pitch weight 1～10% under 80～160 ℃ of temperature in aforesaid reaction vessel, pressure maintains 0.1～0.4MPa, reacts 3-6 hour.Described unsaturated double-bond compounds is divided into two classes, and category-A is vinylformic acid, first class vinylformic acid, toxilic acid, maleic anhydride, and category-B is vinyl cyanide, vinylbenzene, alpha-methyl styrene, acrylamide, first class methyl acrylate, first class glycidyl acrylate; Wherein category-A unsaturated double-bond compounds can be wherein one or more, and category-B unsaturated double-bond compounds can be wherein one or more.The weight ratio of category-A unsaturated double-bond compounds and category-B unsaturated double-bond compounds is 1:0.05～0.2.Wherein, the effect of N-phenylmaleimide is to improve product stability and improve the product workability.
4. above-mentioned reaction product is outgased, filters, obtain modifying asphalt.
The present invention at first drops into pitch in the reactor, and stirred autoclave finishes until final reaction, because thickness or be solid during pitch low temperature should be heated to earlier about 100 ℃ when reactor feed, squeezes in the reactor with bitumenpump again.Add initiator then, add N-phenylmaleimide and unsaturated double-bond compounds again, reaction is 3-6 hour under certain temperature and pressure, makes the modifying asphalt of excellent property after removing small molecules and filter operations such as removing impurity through vacuum then.
The present invention reacts with the specific unsaturated double-bond compounds that contains under the initiator effect, the modifying asphalt that makes can improve anti-flowability under the asphalt high-temperature and the flexible under the low temperature effectively, has also overcome simultaneously the stratified problem of segregation easily takes place in the physical modification method that adds properties-correcting agent in the former oriented pitch.The present invention has greatly improved, the shortcomings such as viscosity low, snappiness difference strong to temperature sensitivity of plain asphalt, can satisfy the road use properties, prolongs road work-ing life; When being used for pavement maintenance, maintenance, can shortening and close traffic time, improve execution conditions, improve operating efficiency.
Embodiment
The present invention is further illustrated below by specific embodiment, but each embodiment all is not to concrete restriction of the present invention.
Embodiment 1
With the 100 parts of (quality of petroleum pitch that are warmed up to 90-130 ℃, add reactor down together), add 0.3 part of benzoyl peroxide, add 1 part of 9 parts in first class vinylformic acid, 1 part of vinylbenzene and N-phenylmaleimide again, 120-135 ℃ of the control that heats up, and feed N2 and make reactor pressure remain on 0.2MPa, reacted 3 hours, the 20min that outgases then obtains the modifying asphalt that low-temperature flexibility is greatly improved after the filtration.
Embodiment 2
With the 100 parts of adding reactors of petroleum pitch that are warmed up to 90-130 ℃, add 0.05 part of ammonium persulphate, add 0.1 part of 1 part of maleic anhydride, 0.05 part of first class glycidyl acrylate and N-phenylmaleimide again, 130-160 ℃ of control heats up, and feeding N2 makes reactor pressure remain on 0.4MPa, reacted 6 hours, the 20min that outgases then obtains the modifying asphalt that high temperature rheology can greatly improve after the filtration.
Embodiment 3
With the 100 parts of adding reactors of oxidized bitumen that are warmed up to 80-100 ℃, add 0.1 part of Potassium Persulphate, add 0.2 part of 1 part in vinylformic acid, 0.2 part of alpha-methyl styrene and N-phenylmaleimide again, 120-150 ℃ of control heats up, and feeding N2 makes reactor pressure remain on 0.1MPa, reacted 4 hours, the 20min that outgases then obtains modifying asphalt after the filtration.
Embodiment 4
With the 100 parts of adding reactors of coal-tar pitch that are warmed up to 110 ℃, added 0.15 part of Diisopropyl azodicarboxylate, add 0.5 part of 0.8 part in vinylformic acid, 0.2 part of alpha-methyl styrene and N-phenylmaleimide again, 120-150 ℃ of control heats up, and feeding N2 makes reactor pressure remain on 0.2MPa, reacted 4 hours, the 20min that outgases then obtains modifying asphalt after the filtration.
Embodiment 5
With the 100 parts of adding reactors of coal-tar pitch that are warmed up to 110 ℃, add 1 part of azo-bis-iso-dimethyl, add 0.7 part of 0.8 part of toxilic acid, 0.2 part of methyl methacrylate and N-phenylmaleimide again, 120-150 ℃ of control heats up, and feeding N2 makes reactor pressure remain on 0.3MPa, reacted 3.5 hours, the 20min that outgases then obtains modifying asphalt after the filtration.
Embodiment 6
With the 100 parts of adding reactors of lake pitch that are warmed up to 130 ℃, add 1 part of benzoyl peroxide, add 0.3 part of 7 parts of maleic anhydrides, 1 part of acrylamide, 0.4 part of methyl acrylate and N-phenylmaleimide again, 130-150 ℃ of control heats up, and feeding N2 makes reactor pressure remain on 0.2MPa, reacted 3 hours, the 20min that outgases then obtains modifying asphalt after the filtration.
Embodiment 7
With the 100 parts of adding reactors of lake pitch that are warmed up to 110 ℃, add 0.1 part of Potassium Persulphate, 0.1 part of azo-bis-iso-dimethyl, add 0.2 part of 4 parts in vinylformic acid, 2 parts of maleic anhydrides, 0.4 part of vinyl cyanide, 0.4 part of glycidyl acrylate and N-phenylmaleimide again, 120-150 ℃ of control heats up, and feeding N2 makes reactor pressure remain on 0.1MPa, reacted 5 hours, the 20min that outgases then obtains modifying asphalt after the filtration.
Claims (3)
1. a modified asphalt preparation method is characterized in that it under the initiator effect, with the reaction of pitch and unsaturated double-bond compounds and make, comprises the steps:
1. pitch is dropped in the reactor;
2. in aforesaid reaction vessel, add initiator; The weight of initiator is bituminous 0.05～1%;
3. add unsaturated double-bond compounds and 0.1～1%N-phenyl maleimide of pitch weight 1～10% under 80～160 ℃ of temperature in aforesaid reaction vessel, pressure maintains 0.1～0.4MPa, reacts 3-6 hour; Described unsaturated double-bond compounds is divided into two classes, and wherein, category-A unsaturated double-bond compounds is one or more mixtures in vinylformic acid, methacrylic acid, toxilic acid, the maleic anhydride; Category-B unsaturated double-bond compounds is one or more mixtures in vinyl cyanide, vinylbenzene, alpha-methyl styrene, acrylamide, methyl methacrylate, the glycidyl methacrylate; The weight ratio of category-A unsaturated double-bond compounds and category-B unsaturated double-bond compounds is 1: 0.05～0.2;
4. above-mentioned reaction product is outgased, filters, obtain modifying asphalt.
2. modified asphalt preparation method according to claim 1 is characterized in that: step 1. in, described pitch is one or more mixtures in petroleum pitch, coal-tar pitch or the lake pitch.
3. modified asphalt preparation method according to claim 1, it is characterized in that: step 2. in, described initiator is one or more mixtures in Potassium Persulphate, ammonium persulphate, benzoyl peroxide, Diisopropyl azodicarboxylate, the azo-bis-iso-dimethyl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101550982A CN101397358B (en) | 2008-10-31 | 2008-10-31 | Method for preparing modified asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101550982A CN101397358B (en) | 2008-10-31 | 2008-10-31 | Method for preparing modified asphalt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101397358A CN101397358A (en) | 2009-04-01 |
| CN101397358B true CN101397358B (en) | 2010-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101550982A Expired - Fee Related CN101397358B (en) | 2008-10-31 | 2008-10-31 | Method for preparing modified asphalt |
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| CN (1) | CN101397358B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850494A (en) * | 2012-08-27 | 2013-01-02 | 句容宁武科技开发有限公司 | Preparation method of chemically modified asphalt |
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| CN102850506B (en) * | 2012-08-27 | 2014-04-16 | 句容宁武科技开发有限公司 | Preparation method of polyurethane modified asphalt |
| CN103305016B (en) * | 2013-06-27 | 2015-07-15 | 句容宁武科技开发有限公司 | Preparation method of bi-component thermosetting epoxy asphalt composite material |
| CN103305017B (en) * | 2013-06-27 | 2015-04-01 | 句容宁武科技开发有限公司 | Preparation method of pavement material with self-adapting pavement temperature adjustment function |
| CN103275503B (en) * | 2013-06-27 | 2015-10-21 | 杨凌领航新材料科技开发有限公司 | A kind of two-component thermosetting bituminous epoxy matrix material of intermediate temperature setting |
| CN106867266B (en) * | 2017-01-20 | 2019-06-18 | 青岛科凯达橡塑有限公司 | A kind of asphalt cold repairing additive and its preparation method and application |
| CN106810889B (en) * | 2017-01-20 | 2019-06-21 | 青岛科凯达橡塑有限公司 | A kind of asphalt cold repairing and preparation method thereof |
| CN109053123A (en) * | 2018-10-18 | 2018-12-21 | 铜陵丰泽建材科技有限公司 | A kind of preparation method of high-strength insulation energy air-entrained concrete building block |
| CN111040361B (en) * | 2019-12-26 | 2021-06-25 | 中路交科科技股份有限公司 | Permeable regenerated sand-containing fog sealing layer material and preparation method thereof |
| CN112961295B (en) * | 2021-03-04 | 2022-11-18 | 苏州科技大学 | Methyl methacrylate-butyl acrylate in-situ copolymerization modified asphalt |
| CN112898510B (en) * | 2021-03-04 | 2022-11-18 | 苏州科技大学 | Vinyl acetate-butyl acrylate in-situ copolymerization modified asphalt |
| CN112898509B (en) * | 2021-03-04 | 2022-11-18 | 苏州科技大学 | Styrene-butyl acrylate in-situ copolymerization modified asphalt |
| CN117417645A (en) * | 2023-11-28 | 2024-01-19 | 河南金欧特实业集团股份有限公司 | Solid waste rubber powder modified emulsified asphalt for permeable pavement and preparation method and application thereof |
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2008
- 2008-10-31 CN CN2008101550982A patent/CN101397358B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102850494A (en) * | 2012-08-27 | 2013-01-02 | 句容宁武科技开发有限公司 | Preparation method of chemically modified asphalt |
| CN102850494B (en) * | 2012-08-27 | 2014-09-03 | 句容宁武科技开发有限公司 | Preparation method of chemically modified asphalt |
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| Publication number | Publication date |
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| CN101397358A (en) | 2009-04-01 |
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Owner name: JURONG NINGWU HIGH-TECH. DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: NINGWU CHEMICAL CO., LTD., JURONG Effective date: 20110707 |
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Effective date of registration: 20111017 Address after: 212400, Jiangsu, Jurong Province, the edge of the town Patentee after: Ningwu Jurong Italy AI Technology Development Co. Ltd. Address before: 212400, Jiangsu, Jurong Province, the edge of the town Patentee before: Jurong Ningwu High-tech. Development Co., Ltd. |
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