CN104629390A - Manufacturing process for forming cold-resistant anti-freeze low-temperature asphalt liquid with stable chemical network - Google Patents
Manufacturing process for forming cold-resistant anti-freeze low-temperature asphalt liquid with stable chemical network Download PDFInfo
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Abstract
The invention discloses a manufacturing process for forming a cold-resistant anti-freeze low-temperature asphalt liquid with a stable chemical network. The manufacturing process mainly comprises the following steps: adding octamethyl cyclotetrasilane and acrylic ester into silicone monomers containing vinyl to perform copolymerization to obtain silicon-acrylate emulsions of different silicon content and studying influences of organic silicon content to a micro-emulsion polymerization process and transparency, cross linking degree, thermal properties and mechanical properties of an emulsion film; then, performing mutual solution to the prepared low-temperature flexible emulsion with a black normal-temperature asphalt liquid to form the cold-resistant anti-freeze low-temperature asphalt liquid with a stable chemical network structure. Modified asphalt residues of the invention have flexibilities even at 40 DEG C below zero and the cold-resistant anti-freeze low-temperature asphalt liquid has better bond strength, softening point and ductility when compared with existing asphalt with an unstable chemical network; furthermore, storage stability of the cold-resistant anti-freeze low-temperature asphalt liquid is far better than that of the existing asphalt with an unstable chemical network.
Description
Technical field
The invention belongs to chemical preparation bituminous liquids field, be specifically related to a kind of production technique forming the cold-resistant freeze proof soft pitch liquid of stable chemical network.
Background technology
Along with the fast development of domestic economy, it is increasingly serious that national energy-saving reduces discharging situation.When energy-saving and emission-reduction have concerned national strategy development time, country can encourage to support less energy-consumption, non-staining industry energetically.Road project is no exception, and development and application novel material becomes the inexorable trend in road engineering.Soft pitch is the high-tech product of new generation of the level leading in the world in recent years occurred, it presents eu-bitumen state under room temperature (-5 DEG C ~ 45 DEG C), heated bitumen can be substituted, do not heat gathering materials and just can become all kinds bituminous concrete by mix, be intended to future portion or all replace heated bitumen concrete topping.Compare with warm-mixed asphalt with heated bitumen, the Heterosis of soft pitch product is in the following aspects: 1) eliminate heat-processed (pitch and building stones are without the need to heating), reduce energy consumption; 2) do not produce flue gas, reduce carbon emission, environment protecting is better; 3) can construct under outside air temperature more than 0 DEG C condition, extend construction seasons, adapt to various working; 4) heated bitumen, Warm-Mix Bitumen Mixture must now mix existing use, and the asphaltum mixture material with low temperature storage time can reach 20 days, avoid the waste being forced to outwell because heat mixture temperature is not enough because weather, machinery and other sudden change accidents cause.
To the road deck materials and structures system of brand-new type be brought up like this, be that the revolutionary character of following asphalt roads material and care field breaks through, belong to low-carbon green industry.The birth of soft pitch material, also will bring many brand-new fields: as tar cement concrete, i.e. the brand-new material of the one be combined completely of cement and pitch, the rigidity of its existing Cement Concrete and intensity, the flexility again containing pitch.Also be expected to derive various room-temperature asphalt compound: mix type concrete, cold-patch type concrete, fast solidifying type concrete, slow hardening type concrete, fragrant concrete.These technology applying at home, will make China reach 1,000,000,000,000 at these field industrial values, and make domestic greenhouse gas emission reduce by 2.7 hundred million tons.
At present, domestic modified emulsifying asphalt and aqueous polymer emulsion, due to the defect of disperse phase structure and single, can not meet the requirement of road over-all properties.Although domestic water-based rosin products is not rare, quality is unstable, and the product being suitable for integrated application is little.Wherein bellwether's ROHM AND HAAS (Rohm & Haas) is though aqueous acrylic adhesives's product of China Branch exploitation is proved by more domestic producers, its later stage adhesion property Shortcomings.Thus these products can't be widely applied in road and bridge and building trade.
Several innovative point of the present invention is as follows:
1) the particle design concept of multiphase polymer structural models is adopted; doctor's Cai Haijun stand-alone development a set of computer program (not applying for a patent temporarily); by the different designs of soft, hard phase component and ratio, substantially obtain meeting the water-based emulsion segment permutation and combination that normal temperature flexible design requires;
2) research and development have the environment protection modification product of international most advanced level and independent intellectual property right: soft section of the rubber powder pbz polymer after letex polymerization and hard section, and prepare organosilicon-modified acrylate emulsion or the rubber powder of the anti-strong acid of positively charged ion, polymer glass temperature <-50oC.Conventional this kind of rubber powder or emulsion are alkalescence, not antiacid, incompatible with cationic emulsified bitumen, and polymer glass temperature is not less than-15
oc, the easy embrittlement in cold district.This project try hard to develop the anti-strong acid emulsion of positively charged ion or rubber powder, the consistency with pitch can be ensured, again at <-50
opolymer segment is had to move and low-temperature flexibility under C;
3) high-performance concentrating chemical asphalt modifier is prepared, do not deposit when guaranteeing to mix mutually with modified emulsifying asphalt or not flocculation, fast setting, strongly adherent, high abrasion, energy-conserving and environment-protective and cold-resistant freeze proof high rigidity-toughness balanced normal temperature bituminous liquids being formed again, having outstanding winter hardiness and high temperature stiffness (-40 by making road and bridge facing concretes
oc is to+40
oc).When composite with emulsified bitumen, due to containing trickle mineral filler, very easily there is deposition or flocculation, make bituminous liquids uneven in Conventional concentration chemical modifier.This project is according to engine request allotment concentrating chemical asphalt modifier, try hard to the heterogeneity problem solved when it mixes with pitch, and give full play to the engineering high-performance of this concentrated properties-correcting agent, make bituminous liquids meet road and bridge engineering demand, especially Low temperature property requirements;
4) polymer modification emulsified bitumen mainly uses polymer modified asphalt to carry out emulsification both at home and abroad, and because this modifying asphalt viscosity is large, therefore emulsifying temperature is high, and emulsification shearing force requires high, use the colloidal mill that powerful, structure are special.Or polymer emulsion simply mixes with emulsified bitumen, or polymer emulsion is added into soap lye, then emulsification together with pitch, thus obtains polymer-asphalt emulsion.But modified emulsifying asphalt performance prepared by latter two method is all not as good as first method.Although this research also uses the third method to prepare normal temperature bituminous liquids, the shearing device used also is domestic common colloidal mill, but this research is mainly by designing the compound of multiple polymers as modified emulsion, thus the performance of aggregation thing emulsion, and with this emulsion for seed, emulsification together with pitch, forms the emulsion of polymkeric substance and the network forming of pitch chemistry, to reach the target of modification soft pitch liquid rigidity-toughness balanced.
Summary of the invention
Goal of the invention: the present invention is for solving above-mentioned Problems existing, a kind of production technique forming the cold-resistant freeze proof soft pitch liquid of stable chemical network is provided, the bituminous material stable performance of producing, breakdown of emulsion molding time are controlled, relevant technologies index meets current specifications and require, can construct under cryogenic.
Technical scheme: a kind of production technique forming the cold-resistant freeze proof soft pitch liquid of stable chemical network, comprises the steps:
(1), prestox ring tetrasilane and acrylic ester copolymer is added with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, add reactive emulsifier again and add hydrolysis inhibitor, monomer high speed shear pre-emulsification, prepares the organosilicon copolymer acrylate emulsion of low-temperature flexibility;
(2), get the organosilicon copolymer acrylate emulsion prepared carry out pre-emulsification on magnetic stirring apparatus, take the ammonium persulfate initiator of 5-10 gram, wiring solution-forming; 60-80 DEG C to be raised to, take out pre-emulsion and initiator solution each 1/5 joins in reaction vessels simultaneously; Remaining pre-emulsion carries out high speed shear dispersion and emulsion and fully mixes, and starts to drip residual monomer, within 2-3 hour, drip off when the material in reactor becomes after micro-blueness gradually, insulation 1.5 ~ 3h, and being down to room temperature, is about 7 ~ 8 by ammoniacal liquor adjust ph, filters discharging;
(3), pitch is mixed by 50:1 proportioning with low temperature emulsion.
As optimization: described initiator amount is 2% of the siloxanyl monomers consumption of vinyl.
As optimization: described temperature of reaction is 80 DEG C, experimental period 6h.
As optimization, the time that described reaction drips monomer is 2 hours.
Prestox ring tetrasilane and acrylic ester copolymer is added with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, utilize the features such as organosilicon composition Si-O bond energy is large, surface energy is low, Chain Flexibility is large, by emulsion polymerizing modification acrylate, improve the Main way that the heat-resisting and water tolerance of acrylic ester polymer has become modification.It is again wherein the research emphasis in this field by acrylate monomer and unsaturated organosilicon coupling agent emulsion copolymerization modification, in modifying process, because organosilane monomer is very easily hydrolyzed, condensation, generate getting up early crosslinking structure in the course of the polymerization process and cause system unstability to condense, therefore silicone content is general lower in the organosilicon crylic acid latex prepared in this way, so by adding reactive emulsifier (AMPS), monomer high speed shear sends out pre-emulsification and add the technology such as hydrolysis inhibitor, prepares stable high silane content, high performance organo-silicon copolymer acrylate emulsion.
Beneficial effect: its step of the present invention mainly adds prestox ring tetrasilane and acrylic ester copolymer with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, have studied the impact of silicone content on micro-emulsion polymerization process and the latex film transparency, degree of crosslinking, thermal characteristics and mechanical property.Again the low temperature emulsion prepared and black normal temperature bituminous liquids are dissolved each other, form a kind of cold-resistant freeze proof soft pitch liquid of stable chemical network structure.Its cohesive strength, softening temperature and ductility are all better than the existing pitch of chemical network instability, and package stability is much better than the latter.
Major measure of the present invention be also add containing high function water miscible ethene improved-vinyl-acetic ester (EVA) rubber powder (pH 7), or the modified acrylate emulsion of the anti-strong acid of positively charged ion (pH 2), wrap inadequate etc. with adhesive power to improve it, try hard to be formed the low-temperature mixed system of strongly adherent, rigidity-toughness balanced and high abrasion.Conventional this kind of rubber powder or emulsion are alkalescence, not antiacid, incompatible with cationic emulsified bitumen.Meanwhile, system viscosity is too high, then need to reduce capillary additive, and rate of set is crossed then needs the composite additive such as emulsion splitter and accelerator slowly.This project tries hard to obtain the material of a kind of low volatile, save energy and enabling environment; And there is high resistance compendency and high surface hardness, long service life.The soft pitch be mixed with has the characteristics such as unique fast setting, strongly adherent concurrently, road and bridge, airport can be met, field and the building trade etc. of standing to rigidity-toughness balanced, high rigidity, low film formation temperature, low volatile, corrosion-resistant, highly to adhere to and the rigors such as environmental protection.Because original bituminous material must close traffic when road and bridge maintenance, bring certain pressure to traffic, and have certain restriction on it is produced and uses.As the success of this research, the problems such as labor intensive is large, long in time limit, difficulty of construction is large of in the past constructing effectively will be solved.The most important thing is that its use cost is lower, only quite or a little more than the cost of present modification emulsified bitumen height sticking layer oil, and maintenance deadline is longer, the hazardness of volatile matter is lower, will to save energy and environment protection highly beneficial.
Cold-resistant freeze proof soft pitch preparation should adopt the pitch of high-quality to prepare, and the indices of pitch itself must meet relative national standards.As the main raw material of normal temperature pitch, pitch indices will meet national relevant requirements.In the present invention, soft pitch is primarily of compositions such as pitch, properties-correcting agent, water, emulsifying agents.On microcosmic, soft pitch presents typical water-in-oil structure, is different from existing emulsified bitumen or modified emulsifying asphalt with oil-in-water structure.The concentrating chemical modified product of the soft pitch of preparation, makes the performance of soft pitch be equivalent to heated bitumen, and road asphalt concrete mixed material is produced at low temperatures.Except not needing heating installation, existing mixing device will be utilized as far as possible, be transformed if desired, soft pitch use cost control with modification heated bitumen quite or slightly high level.And the construction technology of soft pitch concrete is studied, carry out element task for applying on a large scale.
This research will fill up the blank of China's soft pitch and properties-correcting agent research field thereof, has significant economic benefit and social benefit.
Concrete research contents is as follows:
The development of the high-performance water-based polymer emulsion of a and water-soluble gelatin powder:
Adopt the Method and process of at present international advanced seed (or multistep) letex polymerization, micro-emulsion polymerization and emulsion latex interpenetrating polymerization, the polymer beads of heterogeneous structure model is formed in water-based emulsion, by the different designs of soft, hard phase component and ratio, obtain the finished product meeting over-all properties requirement, guarantee the contextual of product performance (as early anaphase adhesive power).Water-soluble gelatin powder is obtained by the drying process with atomizing optimized.
The research of b " concentrating chemical properties-correcting agent ":
The emulsion of preferred stabilizer (as hindered amine as light stabilizer), toughner (as SH-100), tackifier (as hydro carbons dispersion), conditioning agent (as pH value regulator), the water miscible rubber powder of high function or the anti-strong acid of positively charged ion, special surface promoting agent and elite additive (Zetac polymkeric substance or top T uff polymkeric substance).Carry out allotment by test design (DOE) and control temperature, pressure, velocity of shear etc. and obtain " concentrating chemical properties-correcting agent ".Add the soft pitch of preferred " concentrating chemical properties-correcting agent ", both guaranteed and rigidity-toughness balanced compatible with modified emulsifying asphalt, the low-temperature mixed system of fast setting, strongly adherent and high abrasion can be formed again.
The R&D and production process optimization of c soft pitch:
With " concentrating chemical thing modified system " for matrix, by mixing mutually with SBS aqueous latex, emulsified bitumen, filling these emulsions with elite additive (Zetac polymkeric substance or top T uff polymkeric substance), forming the soft pitch system of high abrasion, high-adhesiveness.Reinforce with special surface promoting agent, research improves sticking power and weather resistance.Meanwhile, control liquid low temperature asphalt viscosity, reduce pumping motor power in soft pitch production.
D asphaltum mixture material with low temperature Design and Construction technology research:
According to pavement structure Functional Requirement, with current specifications medium pitch pavement technique index for controling parameters, carry out the design of asphaltum mixture material with low temperature interior ingredient ratio, explore the mix-design of each component and the impact on over-all properties thereof further.By the performance test research to soft pitch surface material, find out their dependencys, and then go deep into systematic research, rely on engineering, making test section, sums up the major control operation and key link that propose pavement construction, thus forms the laying of roadway technology of soft pitch surface material.
Embodiment
Below in conjunction with specific embodiment, the present invention will be described in detail.
Specific embodiment 1:
Form a production technique for the cold-resistant freeze proof soft pitch liquid of stable chemical network, comprise the steps:
(1), prestox ring tetrasilane and acrylic ester copolymer is added with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, add AMPS reactive emulsifier again and add hydrolysis inhibitor, monomer high speed shear sends out pre-emulsification, prepares organosilicon copolymer acrylate emulsion;
(2), get the organosilicon copolymer acrylate emulsion prepared carry out pre-emulsification on magnetic stirring apparatus, take the ammonium persulfate initiator of 5 grams, wiring solution-forming; Wait to be raised to 60 DEG C, take out pre-emulsion and initiator solution each 1/5 joins in reaction vessels simultaneously; Remaining pre-emulsion carries out high speed shear dispersion and emulsion and fully mixes, and starts to drip residual monomer, within 2 hours, drip off when the material in reactor becomes after micro-blueness gradually, insulation 1.5h, and being down to room temperature, is about 7 by ammoniacal liquor adjust ph, filters discharging; Described initiator amount is 2% of the siloxanyl monomers consumption of vinyl.
(3), pitch is mixed by 50:1 proportioning with low temperature emulsion.Based on " concentrating chemical thing modified system ", comprise the water miscible ethane-acetic acid ethyenyl ester of high function (EVA) rubber powder (neutrality), and it is mutually composite with SBS aqueous latex, emulsified bitumen, fill these emulsions through high molecular functional filler, form the normal temperature asphalt system of high abrasion, high-adhesiveness.By the different designs of soft, hard phase component and mixing ratio, obtain the finished product scheme meeting high rigidity-toughness balanced, high-adhesiveness requirement, and guarantee morning, the later stage continuity of product use properties.Reinforce with special surface promoting agent, improve sticking power and weather resistance, there is superpower adhesion property, the high performance low temperature toughness pitch (second-order transition temperature: T of suitably snappiness and high-wearing feature
g=-42
oc).
Specific embodiment 2:
Form a production technique for the cold-resistant freeze proof soft pitch liquid of stable chemical network, comprise the steps:
(1), prestox ring tetrasilane and acrylic ester copolymer is added with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, add AMPS reactive emulsifier again and add hydrolysis inhibitor, monomer high speed shear sends out pre-emulsification, prepares organosilicon copolymer acrylate emulsion;
(2), get the organosilicon copolymer acrylate emulsion prepared carry out pre-emulsification on magnetic stirring apparatus, take the ammonium persulfate initiator of 10 grams, wiring solution-forming; Wait to be raised to 80 DEG C, take out pre-emulsion and initiator solution each 1/5 joins in reaction vessels simultaneously; Remaining pre-emulsion carries out high speed shear dispersion and emulsion and fully mixes, and starts to drip residual monomer, within 3 hours, drip off when the material in reactor becomes after micro-blueness gradually, insulation 3h, and being down to room temperature, is about 8 by ammoniacal liquor adjust ph, filters discharging; Described initiator amount is 2% of the siloxanyl monomers consumption of vinyl.
(3), pitch is mixed by 50:1 proportioning with low temperature emulsion.Based on " concentrating chemical thing modified system ", comprise the organosilicon-modified acrylate emulsion of anti-strong acid, and mutually composite with SBS aqueous latex, emulsified bitumen, fill these emulsions through high molecular functional filler, form the normal temperature asphalt system of high abrasion, high-adhesiveness.By the different designs of soft, hard phase component and mixing ratio, obtain the finished product scheme meeting high rigidity-toughness balanced, high-adhesiveness requirement, and guarantee morning, the later stage continuity of product use properties.Reinforce with special surface promoting agent, improve sticking power and weather resistance, there is superpower adhesion property, the high performance low temperature toughness pitch (second-order transition temperature: T of suitably snappiness and high-wearing feature
g=-33
oc).
Specific embodiment 3:
Form a production technique for the cold-resistant freeze proof soft pitch liquid of stable chemical network, comprise the steps:
(1), prestox ring tetrasilane and acrylic ester copolymer is added with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, add AMPS reactive emulsifier again and add hydrolysis inhibitor, monomer high speed shear sends out pre-emulsification, prepares organosilicon copolymer acrylate emulsion;
(2), get the organosilicon copolymer acrylate emulsion prepared carry out pre-emulsification on magnetic stirring apparatus, take the ammonium persulfate initiator of 7 grams, wiring solution-forming; Wait to be raised to 70 DEG C, take out pre-emulsion and initiator solution each 1/5 joins in reaction vessels simultaneously; Remaining pre-emulsion carries out high speed shear dispersion and emulsion and fully mixes, and starts to drip residual monomer, within 2.5 hours, drip off when the material in reactor becomes after micro-blueness gradually, insulation 2.5h, and being down to room temperature, is about 7.4 by ammoniacal liquor adjust ph, filters discharging; Described initiator amount is 2% of the siloxanyl monomers consumption of vinyl.
(3), pitch is mixed by 50:1 proportioning with low temperature emulsion.Based on " concentrating chemical thing modified system ", comprise organosilicon-modified acrylate emulsion and the water miscible ethane-acetic acid ethyenyl ester of high function (EVA) rubber powder (neutrality) (part by weight 1:3) composite emulsion of anti-strong acid, and it is mutually composite with SBS aqueous latex, emulsified bitumen, fill these emulsions through high molecular functional filler, form the normal temperature asphalt system of high abrasion, high-adhesiveness.By the different designs of soft, hard phase component and mixing ratio, obtain the finished product scheme meeting high rigidity-toughness balanced, high-adhesiveness requirement, and guarantee morning, the later stage continuity of product use properties.Reinforce with special surface promoting agent, improve sticking power and weather resistance, there is superpower adhesion property, the high performance low temperature toughness pitch (second-order transition temperature: T of suitably snappiness and high-wearing feature
g=-40
oc).
Claims (4)
1. form the production technique stablizing the cold-resistant freeze proof soft pitch liquid of chemical network, it is characterized in that: comprise the steps:
(1), prestox ring tetrasilane and acrylic ester copolymer is added with the siloxanyl monomers containing vinyl, prepare the organosilicon crylic acid latex of Different Silicon content, add reactive emulsifier again and add hydrolysis inhibitor, monomer high speed shear pre-emulsification, prepares the organosilicon copolymer acrylate emulsion of low-temperature flexibility;
(2), get the organosilicon copolymer acrylate emulsion prepared carry out pre-emulsification on magnetic stirring apparatus, take the ammonium persulfate initiator of 5-10 gram, wiring solution-forming; 60-80 DEG C to be raised to, take out pre-emulsion and initiator solution each 1/5 joins in reaction vessels simultaneously; Remaining pre-emulsion carries out high speed shear dispersion and emulsion and fully mixes, and starts to drip residual monomer, within 2-3 hour, drip off when the material in reactor becomes after micro-blueness gradually, insulation 1.5 ~ 3h, and being down to room temperature, is about 7 ~ 8 by ammoniacal liquor adjust ph, filters discharging;
(3), pitch is mixed by 50:1 proportioning with low temperature emulsion.
2. the production technique of the cold-resistant freeze proof soft pitch liquid of chemical network is stablized in formation according to claim 1, it is characterized in that: described initiator amount is 2% of the siloxanyl monomers consumption of vinyl.
3. the production technique of the cold-resistant freeze proof soft pitch liquid of chemical network is stablized in formation according to claim 1, it is characterized in that: described temperature of reaction is 80 DEG C, experimental period 6h.
4. the production technique of the cold-resistant freeze proof soft pitch liquid of chemical network is stablized in formation according to claim 1, it is characterized in that: as optimization, and the time that described reaction drips monomer is 2 hours.
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| CN106854373A (en) * | 2016-11-30 | 2017-06-16 | 苏州益可泰电子材料有限公司 | Modified asphalt material and preparation method thereof |
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| CN110194876A (en) * | 2019-06-14 | 2019-09-03 | 南通福伦利新材料有限公司 | A kind of preparation method of low-temperature resistance thickening toughening asphalt modifier |
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| CN108249828A (en) * | 2018-03-21 | 2018-07-06 | 浙江乔兴建设集团有限公司 | The preparation method of the high-elastic high viscous mixed emulsion of anticracking for building |
| CN110194876A (en) * | 2019-06-14 | 2019-09-03 | 南通福伦利新材料有限公司 | A kind of preparation method of low-temperature resistance thickening toughening asphalt modifier |
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| CN104629390B (en) | 2017-12-29 |
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