CN104629390B - Form the production technology of the cold-resistant freeze proof soft pitch liquid of stable chemical network - Google Patents
Form the production technology of the cold-resistant freeze proof soft pitch liquid of stable chemical network Download PDFInfo
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- CN104629390B CN104629390B CN201510071084.2A CN201510071084A CN104629390B CN 104629390 B CN104629390 B CN 104629390B CN 201510071084 A CN201510071084 A CN 201510071084A CN 104629390 B CN104629390 B CN 104629390B
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Abstract
The invention discloses a kind of production technology for the cold-resistant freeze proof soft pitch liquid for forming stable chemical network, its step is mainly to add prestox ring tetrasilane and acrylic ester copolymer with the siloxanyl monomers containing vinyl, the silicone acrylic emulsion of different silicone contents is prepared, have studied influence of the silicone content to micro-emulsion polymerization process and the latex film transparency, the degree of cross linking, hot property and mechanical property.The low-temperature flexibility emulsion prepared and black normal temperature bituminous liquids are dissolved each other again, form a kind of cold-resistant freeze proof soft pitch liquid of the chemical network structure of stabilization.Modified asphaltic residues is subzero 40oC still flexibles, adhesion strength, softening point and ductility will be better than the unstable existing pitch of chemical network, and bin stability is much better than the latter.
Description
Technical field
The invention belongs to chemical preparation bituminous liquids field, and in particular to a kind of to form the cold-resistant freeze proof of stable chemical network
Soft pitch liquid production technology.
Background technology
With the fast development of domestic economy, national energy-saving emission reduction situation is increasingly serious.When energy-saving and emission-reduction have concerned state
When family's strategic development, country can encourage to support low energy consumption, non-staining industry energetically.Road project is no exception,
Develop and application new material is as the inexorable trend in road engineering.Soft pitch is the new of the level leading in the world that occurs in recent years
Generation high-tech product, it is in room temperature（-5℃~45 ℃）Lower presentation liquid asphalt state, can substitute heated bitumen, to gathering materials
Can mix can not heated all kinds bituminous concrete, it is intended to future portion or all instead of heated bitumen concrete topping.
Compared with heated bitumen and warm-mixed asphalt, the Heterosis of soft pitch product is in the following aspects：1) heating is eliminated
Process（Pitch and building stones are without heating）, reduce energy resource consumption；2) flue gas is not produced, reduces carbon emission, environment protecting is more
It is good；3) it can be constructed under 0 DEG C of conditions above of outside air temperature, extend construction seasons, adapt to various working；4）Heated bitumen, warm mix
Asphalt must now mix it is current, and the asphaltum mixture material with low temperature shelf life up to 20 days, avoid because weather, machinery and its
The caused waste for being forced to outwell because of heat mixture temperature deficiency of his mutation accident.
The road deck material and structural system of brand-new type will be so brought up, is following asphalt roads material and care field
Revolutionary breakthrough, belong to low-carbon green industry.The birth of soft pitch material, it will also bring many brand-new fields：Such as drip
A kind of brand-new material being completely combined of blue or green Cement Concrete, i.e. cement and pitch, the rigidity and intensity of its existing Cement Concrete, contains again
The flexility of pitch.It is expected to derive various room-temperature asphalt compounds：Mix type concrete, soon cold-patch type concrete, solidifying type concrete, slow hardening
Type concrete, aroma type concrete.The popularization and application of these technologies at home, China will be made, up to 1,000,000,000,000, to make state in these field industrial values
Interior greenhouse gas emission reduces by 2.7 hundred million tons.
At present, the defects of domestic modified emulsifying asphalt and aqueous polymer emulsion are due to disperse phase structure and single, it is impossible to
Meet the requirement of road combination property.Although domestic water-based naval stores is not rare, quality is unstable, is suitable for comprehensive answer
Product is seldom.Wherein aqueous acrylic adhesives' production of bellwether's ROHM AND HAAS (Rohm ＆ Haas) China Branch exploitation
Though product are proved by some domestic producers, its later stage adhesion property Shortcomings.Thus these products road and bridge and can't built
Industry is built to be widely applied.
Several innovative points of the present invention are as follows：
1）Using the particle design concept of multiphase polymer structural model, a set of computer of doctor's Cai Haijun stand-alone development
Program（Do not apply for a patent temporarily）, by soft, hard phase component and the different designs of ratio, it is substantially achieved and meets normal temperature flexible design
It is required that water-based emulsion segment permutation and combination;
2）Environment protection modification product of the research and development with international most advanced level and independent intellectual property right：Rubber powder after emulsion polymerization contains
Macromolecule soft segment and hard section, and prepare the organosilicon-modified acrylate emulsion or rubber powder of the anti-strong acid of cation, polymer glass
Change temperature<-50oC.Conventional this kind of rubber powder or emulsion are alkalescence, not antiacid, incompatible with cationic emulsified bitumen, and are polymerize
Thing glass transition temperature is not less than -15oC, in the easy embrittlement of cold district.The anti-strong acid emulsion of cation or glue of this item eyesight figure exploitation
Powder, both can guarantee that the compatibility with pitch, and<-50oThere are polymer segment motion and low-temperature flexibility under C；
3）Prepare high-performance concentrating chemical asphalt modifier, it is ensured that do not deposited when being mixed with modified emulsifying asphalt or not
Flocculation, and can form rapid curing, strongly adherent, high abrasion, energy-conserving and environment-protective and cold-resistant freeze proof high rigidity-toughness balanced normal temperature pitch
Liquid, road and bridge facing concrete will be made to have prominent cold resistance and high temperature stiffness (- 40oC to+40oC).Conventional concentration chemistry changes
Property agent when being compounded with emulsified asphalt, due to deposition or flocculation containing trickle inorganic filler, easily occurs so that bituminous liquids are uneven
It is even.This project allocates concentrating chemical asphalt modifier according to engine request, and the heterogeneity for trying hard to solve when it is mixed with pitch is asked
Topic, and the engineering high-performance of this concentration modifying agent is given full play to, bituminous liquids is met road and bridge engineering demand, especially low temperature
Performance requirement；
4）Domestic and international polymer modification emulsified asphalt is mainly emulsified using polymer modified asphalt, due to this modification
Pitch viscosity is big, therefore emulsifying temperature is high, and emulsification shearing force requires high, to use the special colloid mill of powerful, structure.
Or polymer emulsion is simply mixed with emulsified asphalt, or polymer emulsion is added to soap lye, then is emulsified together with pitch, so as to
Obtain polymer-asphalt emulsion.But modified emulsifying asphalt performance prepared by latter two method is not as good as first method.Originally grind
Normal temperature bituminous liquids also are prepared using the third method although studying carefully, used shearing equipment is also domestic common colloid mill,
This research is mainly used as modified emulsion by designing the compound of multiple polymers, so as to optimize the performance of polymer emulsion, and
Using this emulsion as seed, emulsified together with pitch, form polymer and the emulsion of pitch chemistry network forming, dripped with reaching modified low temperature
The target of blue or green liquid rigidity-toughness balanced.
The content of the invention
Goal of the invention：The present invention is the above-mentioned problem of solution, there is provided a kind of to form the cold-resistant anti-of stable chemical network
The production technology of the soft pitch liquid of jelly, the asphalt material stable performance produced, demulsification molding time be controllable, relevant technology
Index meets current specifications requirement, can constructed under cryogenic.
Technical scheme：A kind of production technology for the cold-resistant freeze proof soft pitch liquid for forming stable chemical network, including
Following steps：
（1）, with the siloxanyl monomers containing vinyl add prestox ring tetrasilane and acrylic ester copolymer, prepare difference
The silicone acrylic emulsion of silicone content, reactive emulsifier and addition hydrolysis inhibitor are added, monomer high speed shear pre-emulsification, is prepared
Go out the organosilicon copolymer acrylate emulsion of low-temperature flexibility；
（2）, take the organosilicon copolymer acrylate emulsion prepared to carry out pre-emulsification on magnetic stirring apparatus, weigh 5-10
Gram ammonium persulfate initiator, wiring solution-forming；60-80 DEG C to be raised to, take out each the 1/5 of pre-emulsion and initiator solution simultaneously
It is added in reaction vessels；Remaining pre-emulsion carries out high speed shear dispersion and emulsion and is sufficiently mixed, when the material in reactor
After gradually becoming micro- blueness start that residual monomer is added dropwise, 2-3 hours are dripped off, and are incubated 1.5 ~ 3h, are down to room temperature, and pH is adjusted with ammoniacal liquor
It is worth for 7 ~ 8 or so, filtering and discharging；
（3）, pitch and low temperature emulsion pressed 50:1 match ratio mixes.
As optimization：The initiator amount is the 2% of the siloxanyl monomers dosage of vinyl.
As optimization：The reaction temperature is 80 DEG C, experimental period 6h.
As optimization, the time that monomer is added dropwise in the reaction is 2 hours.
Prestox ring tetrasilane and acrylic ester copolymer are added with the siloxanyl monomers containing vinyl, different silicon is prepared and contains
The silicone acrylic emulsion of amount, using the features such as organosilicon composition Si-O bond energys are big, surface energy is low, Chain Flexibility is big, gathered by emulsion
Modification acrylate is closed, raising acrylate polymer is heat-resisting and water resistance has become modified Main way.Wherein by third
Olefin(e) acid ester monomer is modified with the emulsion copolymerization of unsaturated organosilicon coupling agent and is the research emphasis in the field, in modifying process,
Because organic silicon monomer easily hydrolyzes, condensation, generate getting up early cross-linked structure in the course of the polymerization process and cause system unstability to condense, therefore
Silicone content is typically than relatively low in the silicone acrylic emulsion prepared in this way, so by adding reactive emulsifier（AMPS）、
Monomer sends out the technology such as pre-emulsification and addition hydrolysis inhibitor with high speed shear, prepares stable high silane content, high-performance has
Machine silicon copolymer acrylate emulsion.
Beneficial effect：Its of the invention step be mainly with the siloxanyl monomers containing vinyl add prestox ring tetrasilane with
Acrylic ester copolymer, the silicone acrylic emulsion of different silicone contents is prepared, have studied silicone content to micro-emulsion polymerization process and breast
The influence of the glued membrane transparency, the degree of cross linking, hot property and mechanical property.Again by the low temperature emulsion prepared and black normal temperature pitch
Liquid dissolves each other, and forms a kind of cold-resistant freeze proof soft pitch liquid of the chemical network structure of stabilization.Its adhesion strength, softening point and
Ductility will be better than the unstable existing pitch of chemical network, and bin stability is much better than the latter.
Major measure of the present invention is also to add water miscible ethene improved-vinyl acetate (EVA) rubber powder containing high function
（pH»7）, or the modified acrylate emulsion of the anti-strong acid of cation（pH»2）, with improve its wrap with adhesion not enough etc.,
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, are not resisted
Acid, it is incompatible with cationic emulsified bitumen.Meanwhile system viscosity is too high, then needs to reduce the additive of surface tension, condense speed
Spend then needs the compound additives such as demulsifier and accelerator slowly.This item eyesight figure obtains a kind of low volatile, save the energy and
The material of favorable environment；And with high anti-compendency and high surface hardness, service life length.The soft pitch being configured to has concurrently solely
One without two rapid curing, the characteristic such as strongly adherent, disclosure satisfy that road and bridge, airport, yard and building trade etc. to rigidity-toughness balanced,
The rigors such as high rigidity, low film formation temperature, low volatile, corrosion-resistant, high adhesion and environmental protection.Because original asphalt material exists
Necessary close traffic when road and bridge conserve, certain pressure is brought to traffic, and above have certain limit in its production and utilization
System.Such as the success of this research, the problems such as labor intensive that will effectively solve to construct in the past is big, long in time limit, difficulty of construction is big.It is most heavy
Want be it use cost it is relatively low, only quite or the slightly above cost of the high sticking layer oil of present modification emulsified asphalt, and safeguard
Time limit is longer, volatile matter harmfulness is relatively low, will be highly beneficial to saving the energy and environmental protection.
Prepared by cold-resistant freeze proof soft pitch should use high-quality pitch to prepare, and the indices of pitch in itself have to comply with state
The relevant standard of family.As the primary raw material of normal temperature pitch, pitch indices will meet the relevant requirement of country.Low temperature in the present invention
Pitch is mainly made up of pitch, modifying agent, water, emulsifying agent etc..On microcosmic, typical Water-In-Oil structure is presented in soft pitch, no
Existing emulsified asphalt or modified emulsifying asphalt are same as with oil-in-water structure.The concentrating chemical of the soft pitch of preparation is modified production
Product, make the performance of soft pitch equivalent to heated bitumen, and road asphalt concrete mixed material is produced at low temperature.Except being not required to heat
Outside equipment, existing mixing device will be utilized as far as possible, transformed if necessary, soft pitch use cost control with modification
The suitable or slightly higher level of heated bitumen.And the construction technology of soft pitch concrete is studied, done for large-scale popularization and application
Good element task.
This research will fill up the blank of China's soft pitch and its modifying agent research field, have significant economic benefit
And social benefit.
Specific research contents is as follows：
The development of the high-performance water-based polymer emulsions of a and water-soluble gelatin powder：
Using the current advanced seed in the world（Or multistep）Emulsion polymerization, micro-emulsion polymerization and emulsion latex interpenetrating polymerization
Method and technique, the polymer beads of heterogeneous structure model are formed in water-based emulsion, pass through soft, hard phase component and ratio
Different designs, obtain the final products for meeting combination property requirement, it is ensured that properties of product（Such as early anaphase adhesion）Front and rear connect
Coherence.Water-soluble gelatin powder is obtained by the drying process with atomizing of optimization.
B " concentrating chemical modifying agent " research：
Preferred stabilizer（Such as hindered amine as light stabilizer）, toughener（Such as SH-100）, tackifier（Such as hydro carbons dispersion）、
Conditioning agent（Such as pH value regulator）, the water miscible rubber powder of high function or the anti-strong acid of cation emulsion, special surface activating agent
With special additive（Zetac polymer or top Tuff polymer）.Pass through experimental design（DOE）With control temperature, pressure, cut
Cutting speed degree etc. carries out allotment acquisition " concentrating chemical modifying agent ".The soft pitch of addition preferable " concentrating chemical modifying agent ", both
Ensure and rigidity-toughness balanced compatible with modified emulsifying asphalt, and can forms the low-temperature mixed of rapid curing, strongly adherent and high abrasion
System.
The development of c soft pitches and production technology optimization：
With " concentrating chemical thing modified system " for matrix, by being mixed with SBS aqueous latexes, emulsified asphalt, use is special
Additive（Zetac polymer or top Tuff polymer）These emulsions are filled, form high abrasion, the soft pitch of high-adhesiveness
System.Reinforced with special surface activating agent, research improves adhesive force and durability.Meanwhile liquid low temperature asphalt viscosity is controlled, subtract
Pumping motor power in few soft pitch production.
D asphaltum mixture material with low temperature Design and Construction technology researchs：
According to pavement structure Functional Requirement, using asphalt pavement technique index in current specifications as control parameter, carry out low
The design of temperature asphalt mixture interior ingredient ratio, further explore the mix-design of each component and its shadow to combination property
Ring.By the performance test research to soft pitch surface material, their correlations are found out, and then go deep into systematic research, according to
Engineering is held in the palm, making test section, the major control process and key link for proposing pavement construction are summarized, so as to form soft pitch
The laying of roadway technology of surface material.
Embodiment
With reference to specific embodiment, the present invention will be described in detail.
Specific embodiment 1：
A kind of production technology for the cold-resistant freeze proof soft pitch liquid for forming stable chemical network, comprises the following steps：
（1）, with the siloxanyl monomers containing vinyl add prestox ring tetrasilane and acrylic ester copolymer, prepare difference
The silicone acrylic emulsion of silicone content, adds AMPS reactive emulsifiers and addition hydrolysis inhibitor, and monomer sends out breast pre- with high speed shear
Change, prepare organosilicon copolymer acrylate emulsion；
（2）, take the organosilicon copolymer acrylate emulsion prepared to carry out pre-emulsification on magnetic stirring apparatus, weigh 5 grams
Ammonium persulfate initiator, wiring solution-forming；Wait to be raised to 60 DEG C, take out pre-emulsion and initiator solution each 1/5 adds simultaneously
Into reaction vessels；Remaining pre-emulsion carries out high speed shear dispersion and emulsion and is sufficiently mixed, when the material in reactor is gradual
After becoming micro- blueness start that residual monomer is added dropwise, drip off within 2 hours, be incubated 1.5h, be down to room temperature, be 7 left with ammoniacal liquor regulation pH value
The right side, filtering and discharging；The initiator amount is the 2% of the siloxanyl monomers dosage of vinyl.
（3）, pitch and low temperature emulsion pressed 50:1 match ratio mixes.Based on " concentrating chemical thing modified system ", bag
Include the water miscible ethane-acetic acid ethyenyl ester of high function (EVA) rubber powder（It is neutral）, and mutually compounded with SBS aqueous latexes, emulsified asphalt,
These emulsions are filled by high molecular functional filler, form high abrasion, the normal temperature asphalt system of high-adhesiveness.Pass through soft, hard phase
The different designs of component and mixing ratio, obtain meeting high rigidity-toughness balanced, the final products scheme of high-adhesiveness requirement, and really
Protect morning, the later stage continuity of product performance.Reinforced with special surface activating agent, improve adhesive force and durability, with super
The high performance low temperature toughness pitch of strong adhesion property, appropriate pliability and high-wearing feature（Glass transition temperature：Tg=-
42oC）.
Specific embodiment 2：
A kind of production technology for the cold-resistant freeze proof soft pitch liquid for forming stable chemical network, comprises the following steps：
（1）, with the siloxanyl monomers containing vinyl add prestox ring tetrasilane and acrylic ester copolymer, prepare difference
The silicone acrylic emulsion of silicone content, adds AMPS reactive emulsifiers and addition hydrolysis inhibitor, and monomer sends out breast pre- with high speed shear
Change, prepare organosilicon copolymer acrylate emulsion；
（2）, take the organosilicon copolymer acrylate emulsion prepared to carry out pre-emulsification on magnetic stirring apparatus, weigh 10 grams
Ammonium persulfate initiator, wiring solution-forming；Wait to be raised to 80 DEG C, take out pre-emulsion and initiator solution each 1/5 adds simultaneously
Into reaction vessels；Remaining pre-emulsion carries out high speed shear dispersion and emulsion and is sufficiently mixed, when the material in reactor is gradual
After becoming micro- blueness start that residual monomer is added dropwise, drip off within 3 hours, be incubated 3h, be down to room temperature, be 8 or so with ammoniacal liquor regulation pH value,
Filtering and discharging；The initiator amount is the 2% of the siloxanyl monomers dosage of vinyl.
（3）, pitch and low temperature emulsion pressed 50:1 match ratio mixes.Based on " concentrating chemical thing modified system ", bag
The organosilicon-modified acrylate emulsion of anti-strong acid is included, and is mutually compounded with SBS aqueous latexes, emulsified asphalt, by macromolecule work(
Energy filler fills these emulsions, forms high abrasion, the normal temperature asphalt system of high-adhesiveness.Pass through soft, hard phase component and match ratio
The different designs of example, obtain meeting high rigidity-toughness balanced, the final products scheme of high-adhesiveness requirement, and ensure product usability
The morning of energy, later stage continuity.Reinforced with special surface activating agent, improve adhesive force and durability, have superpower adhesion property,
The high performance low temperature toughness pitch of appropriate pliability and high-wearing feature（Glass transition temperature：Tg=-33oC）.
Specific embodiment 3：
A kind of production technology for the cold-resistant freeze proof soft pitch liquid for forming stable chemical network, comprises the following steps：
（1）, with the siloxanyl monomers containing vinyl add prestox ring tetrasilane and acrylic ester copolymer, prepare difference
The silicone acrylic emulsion of silicone content, adds AMPS reactive emulsifiers and addition hydrolysis inhibitor, and monomer sends out breast pre- with high speed shear
Change, prepare organosilicon copolymer acrylate emulsion；
（2）, take the organosilicon copolymer acrylate emulsion prepared to carry out pre-emulsification on magnetic stirring apparatus, weigh 7 grams
Ammonium persulfate initiator, wiring solution-forming；Wait to be raised to 70 DEG C, take out pre-emulsion and initiator solution each 1/5 adds simultaneously
Into reaction vessels；Remaining pre-emulsion carries out high speed shear dispersion and emulsion and is sufficiently mixed, when the material in reactor is gradual
After becoming micro- blueness start that residual monomer is added dropwise, drip off within 2.5 hours, be incubated 2.5h, be down to room temperature, be with ammoniacal liquor regulation pH value
7.4 or so, filtering and discharging；The initiator amount is the 2% of the siloxanyl monomers dosage of vinyl.
（3）, pitch and low temperature emulsion pressed 50:1 match ratio mixes.Based on " concentrating chemical thing modified system ", bag
Include the organosilicon-modified acrylate emulsion and the water miscible ethane-acetic acid ethyenyl ester of high function (EVA) rubber powder of anti-strong acid（In
Property）（Part by weight 1：3）Complex emulsions, and mutually compounded with SBS aqueous latexes, emulsified asphalt, filled out by high molecular functional filler
These emulsions are filled, form high abrasion, the normal temperature asphalt system of high-adhesiveness.Pass through soft, hard phase component and the difference of mixing ratio
Design, obtain meeting high rigidity-toughness balanced, the final products scheme of high-adhesiveness requirement, and ensure product performance morning, after
Phase continuity.Reinforced with special surface activating agent, improve adhesive force and durability, there is superpower adhesion property, be appropriate flexible
The high performance low temperature toughness pitch of property and high-wearing feature（Glass transition temperature：Tg=-40oC）.
Claims (2)
- A kind of 1. production technology for the cold-resistant freeze proof soft pitch liquid for forming stable chemical network, it is characterised in that：Including Following steps：(1) prestox ring tetrasilane and acrylic ester copolymer, are added with the siloxanyl monomers containing vinyl, different silicon is prepared and contains The silicone acrylic emulsion of amount, reactive emulsifier AMPS and addition hydrolysis inhibitor are added, monomer high speed shear pre-emulsification, is prepared Go out the organosilicon copolymer acrylate emulsion of low-temperature flexibility；(2), take the organosilicon copolymer acrylate emulsion prepared to carry out pre-emulsification on magnetic stirring apparatus, weigh 5-10 grams Ammonium persulfate initiator, wiring solution-forming；60-80 DEG C to be raised to, take out pre-emulsion and initiator solution each 1/5 adds simultaneously Into reaction vessels；Remaining pre-emulsion carries out high speed shear dispersion and emulsion and is sufficiently mixed, when the material in reactor is gradual After becoming micro- blueness start that residual monomer is added dropwise, 2-3 hours are dripped off, and are incubated 1.5~3h, are down to room temperature, and pH value is adjusted with ammoniacal liquor For 7~8, filtering and discharging, low temperature emulsion is obtained；The ammonium persulfate initiator dosage is the siloxanyl monomers dosage of vinyl 2%；(3) pitch and low temperature emulsion, are pressed 50:1 match ratio mixes.
- 2. the production technology of the cold-resistant freeze proof soft pitch liquid according to claim 1 for forming stable chemical network, It is characterized in that：The time that residual monomer is added dropwise in the reaction is 2 hours.
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| CN106854373B (en) * | 2016-11-30 | 2019-06-04 | 安徽茂诚路桥工程有限公司 | The preparation method of modified asphalt material |
| CN106883759A (en) * | 2017-03-09 | 2017-06-23 | 南通福伦利新材料有限公司 | Building cracking resistance stitches the preparation method and its construction technology of spraying high-viscosity high-elasticity composite aqueous emulsion sill |
| 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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| CN103951988A (en) * | 2014-04-23 | 2014-07-30 | 苏州羽帆新材料科技有限公司 | Break-resistant and corrosion-resistant asphalt material and preparation method thereof |
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Inventor after: Cai Haijun Inventor after: Ji Zhijun Inventor after: Shao Xuejun Inventor after: Liu Xiaoxu Inventor before: Cai Haijun |
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Effective date of registration: 20170831 Address after: 226000 No. 788 Century Avenue, Tongzhou Economic Development Zone, Jiangsu, Nantong Applicant after: Nantong Fulunli New Material Co., Ltd. Applicant after: Nantong Municipal Facilities Management Office Address before: 226300 Century Avenue, Tongzhou Economic Development Zone, Jiangsu, China, No. 788, No. Applicant before: Nantong Fulunli New Material Co., Ltd. |
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