CN104212189B - The preparation method of PUR viscosity modified road pitch - Google Patents
The preparation method of PUR viscosity modified road pitch Download PDFInfo
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- CN104212189B CN104212189B CN201410426944.5A CN201410426944A CN104212189B CN 104212189 B CN104212189 B CN 104212189B CN 201410426944 A CN201410426944 A CN 201410426944A CN 104212189 B CN104212189 B CN 104212189B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000011159 matrix material Substances 0.000 claims abstract description 34
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 22
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 20
- 239000010426 asphalt Substances 0.000 claims abstract description 19
- -1 glycerol ester Chemical class 0.000 claims abstract description 19
- 239000002023 wood Substances 0.000 claims abstract description 15
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 14
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 14
- 239000010425 asbestos Substances 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 14
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000010792 warming Methods 0.000 claims abstract description 4
- CCJAYIGMMRQRAO-UHFFFAOYSA-N 2-[4-[(2-hydroxyphenyl)methylideneamino]butyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCCN=CC1=CC=CC=C1O CCJAYIGMMRQRAO-UHFFFAOYSA-N 0.000 claims description 7
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 6
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 6
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 5
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical group C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 4
- 239000012965 benzophenone Substances 0.000 claims description 4
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 3
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 3
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 3
- 229960004889 salicylic acid Drugs 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims 5
- 229920000573 polyethylene Polymers 0.000 claims 5
- 125000004066 1-hydroxyethyl group Chemical group [H]OC([H])([*])C([H])([H])[H] 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 3
- 230000003712 anti-aging effect Effects 0.000 abstract description 2
- 239000011295 pitch Substances 0.000 description 44
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 239000011294 coal tar pitch Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
Disclosed by the invention is the preparation method of PUR viscosity modified road pitch. The present invention includes following steps, (1) raw material of the following weight portion of preparation: the asbestos fibre of the PEF of 8%-12%, the hydrogenated wood rosin glycerol ester of 5%-15%, 2%-4%, the crosslinking agent of 1%-3%, the ultra-violet absorber of 0.5%-1.5%, all the other are matrix pitch; In described matrix pitch, include kir, kir accounts for the more than 20% of matrix pitch weight; (2) kir and asphalt are put into heating cavity and be heated to 210-230 DEG C, then stir until the temperature in heating cavity while being down to 170-190 DEG C, continuing under the condition stirring, then adding PEF; (3), after PEF mixes, be warming up to after 210-230 DEG C, then add hydrogenated wood rosin glycerol ester, crosslinking agent and ultra-violet absorber; (4) after all mixing, cool to 140-160 DEG C, then add asbestos fibre in this mixture, after mixing, make finished product. It is larger that the present invention has rigidity, and bending tensile strength is higher, and anti-aging is effective, holds the advantages such as sticky excellent performance.
Description
Technical field
The preparation method who the present invention relates to a kind of road surfacing modified pitch, that be specifically related to is the preparation method of PUR viscosity modified road pitch.
Background technology
The pitchy complex mixture that pitch is made up of hydrocarbon and the nonmetal derivative thereof of different molecular weight, is in a liquid state, and is a kind of waterproof and dampproof and corrosion-resistant organic gel gel material. For industry and surfacings etc. such as coating, plastics, rubber.
Wherein, matrix pitch is divided into asphalt and the large class of tar asphalt two. Wherein, asphalt is divided into again bitumen and asphalt, and bitumen is that oil oozes out the residue of earth's surface after long term exposure and evaporation, can be divided into lake asphalt, kir, seabed pitch; Asphalt is the product that the remaining residual oil of refining processing oil is obtained after suitable PROCESS FOR TREATMENT again. Tar asphalt is the product of the tar that obtains of the organic matter such as coal, timber destructive distillation machining after reprocessing, can be divided into coal tar pitch, wood pitch etc.
In civil engineering, pitch is widely used waterproof material and anti-corrosion material, is mainly used in the waterproof of roofing, ground, underground structure, timber, steel anticorrosion. Widely used pavement structure cementing material in pitch or road engineering, since reform and opening-up, the economy of China is keeping growth at a high speed always, and Construction of Highway Traffic is advanced by leaps and bounds, and road asphalt manufacturing enterprise of China has also obtained fast development. The pitch overwhelming majority who adopts in engineering is asphalt, and asphalt is the mixture that complicated hydrocarbon derivative nonmetal with it forms. Conventionally pitch flash-point is between 240 DEG C ~ 330 DEG C, burning-point than flash-point approximately high 3 DEG C ~ 6 DEG C of degree, therefore construction temperature should be controlled at below flash-point.
The flow deformation of bituminous paving is modal damage of bituminous pavement phenomenon in the world. According to statistics, in the maintenance statistics on road surface, approximately have 80% to be because the deformation failure that rut causes. After proportioning from the mineral material of different compositions by asphalt material, can build up the bituminous paving of different structure, comparatively extensive at application in highways. Especially heavy traffic paving asphalt and modified pitch realized by without to having, ascending, qualitative leap from less to more, for huge contribution has been made in China's road construction.
But the pitch of existing pavement usage is not long service life, easily aging, and heat resistance is bad, road surface rigidity not and then cause pavement deformation.
Summary of the invention
The object of the invention is to the problem that solves existing bituminous paving rigidity not and then cause pavement deformation, the preparation method of the PUR viscosity modified road pitch that a kind of rigidity is large, bending tensile strength is higher is provided.
For solving above-mentioned shortcoming, technical scheme of the present invention is as follows:
The preparation method of PUR viscosity modified road pitch, comprises the following steps,
(1) raw material of the following percentage by weight of preparation:
The asbestos fibre of the PEF of 8%-12%, the hydrogenated wood rosin glycerol ester of 5%-15%, 2%-4%, the crosslinking agent of 1%-3%, the ultra-violet absorber of 0.5%-1.5%, all the other are matrix pitch;
In described matrix pitch, include kir, kir weight accounts for the more than 20% of matrix pitch weight;
(2) kir and asphalt are put into heating cavity and be heated to 210-230 DEG C, then stir until the temperature in heating cavity while being down to 170-190 DEG C, continuing under the condition stirring, then adding PEF;
(3), after PEF mixes, be warming up to after 210-230 DEG C, then add hydrogenated wood rosin glycerol ester, crosslinking agent and ultra-violet absorber;
(4) after all mixing, cool to 140-160 DEG C, then add asbestos fibre in this mixture, after mixing, make finished product.
Preferably, described crosslinking agent is selected from acrylic acid, hydroxy-ethyl acrylate, hydroxypropyl acrylate, methacrylic acid, hydroxyethyl methacrylate, hydroxy propyl methacrylate, divinylbenzene, N hydroxymethyl acrylamide and DAAM.
Further, described ultra-violet absorber is selected from benzophenone, salicylic acid and BTA.
Preferred as one, Raw of the present invention comprises the component of following percentage by weight:
8% PEF, 15% hydrogenated wood rosin glycerol ester, 4% asbestos fibre, 2% crosslinking agent, 1.5% ultra-violet absorber, all the other are matrix pitch; In described matrix pitch, include kir, kir accounts for 40% of matrix pitch weight.
Preferred as another kind, Raw of the present invention comprises the component of following percentage by weight:
12% PEF, 10% hydrogenated wood rosin glycerol ester, 4% asbestos fibre, 3% crosslinking agent, 1% ultra-violet absorber, all the other are matrix pitch; In described matrix pitch, include kir, kir accounts for 25% of matrix pitch weight.
The present invention compared with prior art, has the following advantages and beneficial effect:
The present invention has advantages of that rigidity is large, bending tensile strength is higher, and the present invention simultaneously also has good anti-aging effect, continues adhesive property excellence.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment 1
The preparation method of PUR viscosity modified road pitch, comprises the following steps,
(1) first all raw materials are prepared completely.
Raw material comprises that percentage by weight is 8% PEF, 15% hydrogenated wood rosin glycerol ester, 4% asbestos fibre, 2% crosslinking agent, 1.5% ultra-violet absorber, and all the other are matrix pitch; In described matrix pitch, include kir, kir accounts for 60% of matrix pitch weight.
Wherein, ultra-violet absorber is BTA and salicylic mixture, and this BTA and salicylic weight ratio are 1: 1; Described crosslinking agent is the mix preparation of hydroxy-ethyl acrylate, hydroxy propyl methacrylate, N hydroxymethyl acrylamide and DAAM, and wherein the weight ratio between hydroxy-ethyl acrylate, hydroxy propyl methacrylate, N hydroxymethyl acrylamide and DAAM is 1: 1: 2: 1.
After mixing, the ratio that is, 1: 1 with salicylic acid according to weight ratio by the BTA in the present embodiment obtains ultra-violet absorber required in the present embodiment. Be 1: 1: 2 by hydroxy-ethyl acrylate, hydroxy propyl methacrylate, N hydroxymethyl acrylamide and DAAM according to weight ratio: after 1 ratio mixes, obtain crosslinking agent required in the present embodiment.
Matrix pitch is that the asphalt that 60% kir and percentage by weight are 40% forms by percentage by weight.
(2) kir and asphalt are put into heating cavity and be heated to 220 DEG C, then stir until the temperature in heating cavity while being down to 180 DEG C of left and right, continuing under the condition stirring, then adding PEF.
(3), after PEF mixes, be warming up to behind 220 DEG C of left and right, then add hydrogenated wood rosin glycerol ester, crosslinking agent and ultra-violet absorber.
(4) after all mixing, cool to 150 DEG C of left and right, then add asbestos fibre in this mixture, after mixing, make the preparation method of PUR viscosity modified road pitch of the present invention.
In the present embodiment, the high temperature rut of this modified pitch has reached 12159 times/mm, and compression strength has reached 5.3Mpa, aging by UV after, the high temperature rut of this modified pitch has reached 11998 times/mm, compression strength is 5.3Mpa. Heat resistance has reached 83 DEG C, holds the viscosity time to reach 26min.
Embodiment 2
The present embodiment and the difference of embodiment 1 be the content of each component in raw material and composition different, composition and the percentage by weight thereof of concrete each component are as follows:
The present embodiment comprises 12% PEF, 10% hydrogenated wood rosin glycerol ester, 4% asbestos fibre, 3% crosslinking agent, 1% ultra-violet absorber, and all the other are matrix pitch; In described matrix pitch, include kir, kir accounts for 25% of matrix pitch weight.
Wherein, described crosslinking agent is 1: 3: 2 by weight ratio acrylic acid, hydroxyethyl methacrylate and divinylbenzene form. Described ultra-violet absorber is made up of benzophenone. Described matrix pitch is made up of the kir of 25% percentage by weight and the coal tar pitch of 75% percentage by weight.
In the present embodiment, the high temperature rut of this modified pitch has reached 16371 times/mm, and compression strength has reached 6.9Mpa, aging by UV after, the high temperature rut of this modified pitch has reached 14086 times/mm, compression strength is 6.8Mpa. Heat resistance has reached 80 DEG C, holds the viscosity time to reach 31min.
Embodiment 3
The present embodiment and the difference of embodiment 1 be the content of each component in raw material and composition different, composition and the percentage by weight thereof of concrete each component are as follows:
The present embodiment comprises 10% PEF, 8% hydrogenated wood rosin glycerol ester, 2% asbestos fibre, 3% crosslinking agent, 0.8% ultra-violet absorber, and all the other are matrix pitch; In described matrix pitch, include kir, kir accounts for 40% of matrix pitch weight.
Wherein, described crosslinking agent is 2: 1: 3 by weight ratio hydroxy-ethyl acrylate, methacrylic acid and N hydroxymethyl acrylamide form. Benzophenone and BTA that described ultra-violet absorber is 1: 2 by weight ratio form. Described matrix pitch is made up of the kir of 35% percentage by weight and the coal tar pitch of 65% percentage by weight.
In the present embodiment, the high temperature rut of this modified pitch has reached 14151 times/mm, and compression strength has reached 5.9Mpa, aging by UV after, the high temperature rut of this modified pitch has reached 14086 times/mm, compression strength is 5.8Mpa. Heat resistance has reached 76 DEG C, holds the viscosity time to reach 27min.
In summary, high temperature rut of the present invention reached 10000 times/more than mm, more than compression strength has reached 5Mpa, ageing-resistant performance of the present invention is higher, Good Heat-resistance. Meanwhile, the present invention also can be used as pressure-sensitive tape and uses, and it is fabulous that it holds viscosity, of the present invention holding more than the viscosity time can reach 25min.
Above-described embodiment is only the preferred embodiments of the present invention, and not limiting the scope of the invention adopts design principle of the present invention in every case, and carries out non-creativeness work on this basis and the variation made, within all should belonging to protection scope of the present invention.
Claims (4)
1. the preparation method of PUR viscosity modified road pitch, is characterized in that, comprise the following steps,
(1) raw material of the following percentage by weight of preparation:
The asbestos fibre of the polyethylene of 8%-12%, the hydrogenated wood rosin glycerol ester of 5%-15%, 2%-4%, the crosslinking agent of 1%-3%, the ultra-violet absorber of 0.5%-1.5%, all the other are matrix pitch;
In described matrix pitch, include kir, kir weight accounts for the more than 20% of matrix pitch weight;
(2) kir and asphalt are put into heating cavity and be heated to 210-230 DEG C, then stir until the temperature in heating cavity while being down to 170-190 DEG C, continuing under the condition stirring, then adding polyethylene;
(3), after polyethylene mixes, be warming up to after 210-230 DEG C, then add hydrogenated wood rosin glycerol ester, crosslinking agent and ultra-violet absorber;
(4) after all mixing, cool to 140-160 DEG C, then add asbestos fibre in this mixture, after mixing, make finished product;
Described crosslinking agent is 1: 1: 2 by weight ratio: 1 hydroxy-ethyl acrylate, hydroxy propyl methacrylate, N hydroxymethyl acrylamide and DAAM form; Or acrylic acid, hydroxyethyl methacrylate and divinylbenzene that described crosslinking agent is 1: 3: 2 by weight ratio form; Or hydroxy-ethyl acrylate, methacrylic acid and N hydroxymethyl acrylamide that described crosslinking agent is 2: 1: 3 by weight ratio form.
2. the preparation method of PUR viscosity modified road pitch according to claim 1, is characterized in that, described ultra-violet absorber is selected from benzophenone, salicylic acid and BTA.
3. according to the preparation method of the PUR viscosity modified road pitch described in claim 1～2 any one, it is characterized in that, described raw material comprises the component of following percentage by weight:
8% polyethylene, 15% hydrogenated wood rosin glycerol ester, 4% asbestos fibre, 2% crosslinking agent, 1.5% ultra-violet absorber, all the other are matrix pitch;
In described matrix pitch, include kir, kir accounts for 40% of matrix pitch weight.
4. according to the preparation method of the PUR viscosity modified road pitch described in claim 1～2 any one, it is characterized in that, described raw material comprises the component of following percentage by weight:
12% polyethylene, 10% hydrogenated wood rosin glycerol ester, 4% asbestos fibre, 3% crosslinking agent, 1% ultra-violet absorber, all the other are matrix pitch;
In described matrix pitch, include kir, kir accounts for 25% of matrix pitch weight.
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| CN201410426944.5A CN104212189B (en) | 2014-08-27 | 2014-08-27 | The preparation method of PUR viscosity modified road pitch |
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| CN201410426944.5A CN104212189B (en) | 2014-08-27 | 2014-08-27 | The preparation method of PUR viscosity modified road pitch |
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| CN104212189A CN104212189A (en) | 2014-12-17 |
| CN104212189B true CN104212189B (en) | 2016-05-18 |
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| CN105086481B (en) * | 2015-08-21 | 2017-10-24 | 中国路桥工程有限责任公司 | Waste and old rubber high polymer alloy stable type rubber modified asphalt and its preparation technology |
| CN106832975A (en) * | 2017-02-25 | 2017-06-13 | 江西省公路工程检测中心 | A kind of road asphalt modifying agent and preparation method thereof |
| CN108948755A (en) * | 2017-05-18 | 2018-12-07 | 济宁明升新材料有限公司 | It is a kind of improve Pavement Performance lignin-base phenolic resin adhesive and its application |
| CN107815129A (en) * | 2017-10-24 | 2018-03-20 | 上海市政工程设计研究总院（集团）有限公司 | A kind of preparation method of the excellent composite modified rubber asphalt of antistrip performance |
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| CN100569888C (en) * | 2006-05-19 | 2009-12-16 | 中国石油化工股份有限公司 | Hot-melt asphalt adhesive and preparation method thereof |
| KR100959564B1 (en) * | 2008-07-03 | 2010-05-27 | 주식회사 알. 브이 | Solvent-free Modified Asphalt Waterproofing Material for Cold Applications and Preparing Method for the Same |
| CN101885870B (en) * | 2010-08-11 | 2012-10-10 | 陕西长大博源公路养护科技有限公司 | High-viscosity thin-layer bituminous mixture modifier and application thereof |
| CN105199665B (en) * | 2013-07-19 | 2018-04-17 | 北京东方雨虹防水技术股份有限公司 | A kind of high tack adhesive waterproof coil and preparation method thereof |
| CN103965829A (en) * | 2014-05-22 | 2014-08-06 | 宿迁金倍尔建筑材料有限公司 | Asphalt-based hot-melt pressure-sensitive adhesive and preparation method thereof |
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Effective date of registration: 20160420 Address after: 810016 Nanjing Road, Xining, Qinghai, Nanjing Road, No. 189-29 Applicant after: Qinghai Xingli Highway and Bridge Engineering Co. Address before: 610000 Chengdu City, Chenghua District Province, No. two North Ring Road, No. four, No. 1, with a layer of No. 2, No. 104 Applicant before: CHENGDU RONGDE CONSTRUCTION LABOR SERVICE Co.,Ltd. |
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Address after: 810016 No. 189-29 Nanjing Road, Chengbei District, Qinghai, Xining Patentee after: Qinghai Xingli highway and Bridge Engineering Co.,Ltd. Address before: 810016 No. 189-29 Nanjing Road, Chengbei District, Qinghai, Xining Patentee before: Qinghai Xingli Highway and Bridge Engineering Co. |
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Granted publication date: 20160518 |