CN1361225A - Sprayed material to form waterproof film - Google Patents

Sprayed material to form waterproof film Download PDF

Info

Publication number
CN1361225A
CN1361225A CN 00120645 CN00120645A CN1361225A CN 1361225 A CN1361225 A CN 1361225A CN 00120645 CN00120645 CN 00120645 CN 00120645 A CN00120645 A CN 00120645A CN 1361225 A CN1361225 A CN 1361225A
Authority
CN
China
Prior art keywords
blasting materials
membrane waterproofing
parts
component
oxygenant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 00120645
Other languages
Chinese (zh)
Other versions
CN1163568C (en
Inventor
杨其新
刘东民
盛草樱
高明
潘家鼎
杨美传
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHENGDU JIAZHOU NEW WATERPROOF MATERIALS Co Ltd
Chengdu Venturecapital Co Ltd
Original Assignee
杨其新
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 杨其新 filed Critical 杨其新
Priority to CNB001206451A priority Critical patent/CN1163568C/en
Publication of CN1361225A publication Critical patent/CN1361225A/en
Application granted granted Critical
Publication of CN1163568C publication Critical patent/CN1163568C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Paints Or Removers (AREA)

Abstract

The sprayed material to form waterproof film has acrylic acid or its derivative as filming component and contains also oxidant, reductant, aggregate stuffing component, auxiliary component and water. It consists of three components of basic material, oxidant and reductant, and its basic material includes the water solution of magnesium acrylate, hydroxyl ethy cellulose, silica white, aggregate stuffing, talcum, polyglycol and auxiliary additives.

Description

Be used to form the blasting materials of membrane waterproofing
The present invention relates to be a kind of be the blasting materials of application target on processed basal plane, to form membrane waterproofing, as the construction of carrying out anti-seep water at each sharp tunnel wall with the film forming blasting materials that uses in handling to job facilities such as railway, highways.
In the tunnel and underground works of basic job facilities such as the electrified railway tunnels that has built up, motorway, subterranean railway, the situation that influences normal use owing to the percolating water of its wall is much, because of the repairing seepage expense that drops into that the underground waterproof engineering of having built up was lost efficacy also is very surprising.Therefore no matter be current or from now on, the anti-seep water during these foundation workss are built requires all more and more higher.For a change adopt the mode that hangs product of rubber and plastic to carry out the way of tunnel wall anti-seep water, publication number is that disclosing a kind of in the Japanese documentation of clear 61-19683 is film forming composition component with the vinylformic acid or derivatives thereof, and contain the film forming blasting materials of oxygenant, reductive agent, aggregate filling components and component forms such as auxiliary component and water simultaneously, after with special-purpose ejecting equipment it being sprayed into tunnel wall etc. and need making basal plane that anti-seep water handles, make it be attached to this basal plane position and polymerization reaction take place and form the rete that can prevent seepage.Because its film forming is higher with the viscosity of propellant, splashing device and site technology operation are all had higher requirements.Simultaneously, when the relative humidity of construction environment is lower than 90% pair, the membrane waterproofing fragility that this film forming propellant forms in processed basal plane place is bigger, because of structural distortion is damaged waterproof layer is lost efficacy easily.As by the said adding glycerine of its document, though fragility is reduced, but the viscosity of this membrane-forming agent is increased in time and easily cause making the construction of spraying to be difficult to even can't carry out.Simultaneously, owing to need during its construction to be injected into processed basal plane place respectively with the kinds of ingredients that different splashing devices will be disposed by different components respectively, the film forming process of the mixing of kinds of ingredients and polymerization reaction take place, all after arriving and be attached to wall, this propellant just begins to carry out and finish, thereby the needed time of film process is longer relatively, cause speed of application slow, and be subject to the influence of external environments such as environment and construction wall, and make construction quality restive.As, it is inhomogeneous that its mixing on processed basal plane takes place easily, i.e. each diversity phenomenon.In addition, use to show that this film forming also is difficult for and moistening basal plane bonding with propellant, on the construction wall, easily produce the sagging phenomenon, particularly spray basal plane humidity when big, quality of forming film is more had tangible disadvantageous effect.
Given this, the objective of the invention is to provide a kind of and be easier to construction in job facilities such as railway, highway, positions such as various tunnels wall being carried out the problems referred to above that exist in the anti-seep water construction processing, and result of use more ideal be used to form the blasting materials of membrane waterproofing.
The present invention is used to form the blasting materials of membrane waterproofing, is film forming composition component with the vinylformic acid or derivatives thereof still, and contains oxygenant, reductive agent, aggregate filling components and auxiliary component and water.Specifically this blasting materials is made up of basic components and oxygenant and reductive agent three class components, and is composed as follows in each heavy component:
(1) basic components: 100 parts of 25%~50% (weight) vinylformic acid magnesium aqueous solution,
Natvosol 0.2-0.3 part,
White carbon black 5-20 part,
Aggregate stopping composition 10-30 part,
Talcum powder 5-15 part,
Polyoxyethylene glycol 5-25 part,
Auxiliary interpolation component 0-0.5 part,
Wherein white carbon black, aggregate stopping composition and talcous weight summation≤35 parts;
(2) reductive agent: 0.1-0.5 part,
(3) oxygenant: 0.5-2 part.
Said aggregate stopping composition can be lime carbonate and kaolin in the above-mentioned composition, and its weight is consisted of: lime carbonate 5-15 part, kaolin 5-15 part.
Said complementary interpolation component is to select the composition that uses according to the practice of construction needs in the above-mentioned composition.For example, it can be that consumption is antibacterial mildew inhibitors commonly used such as the sodium Diacetate, potassium sorbate, Sodium Benzoate of 0-0.3 weight part, and/or consumption is class compositions such as defoamer commonly used such as the isopropylcarbinol, tributyl phosphate of 0.005-0.2 weight part.
On the basis of above-mentioned composition, the present invention proposes the blasting materials that is used to form membrane waterproofing of following composition form especially, and its weight consists of:
100 parts of 35% the vinylformic acid magnesium aqueous solution,
Natvosol 0.2-0.3 part,
10 parts of white carbon blacks,
10 parts of kaolin,
10 parts in lime carbonate,
10 parts of talcum powder,
Polyoxyethylene glycol 5-25 part,
0.3 part of sodium Diacetate,
Defoamer 0.005-0.2 part,
Reductive agent 0.1-0.5 part,
Oxygenant 0.5-2 part,
Wherein white carbon black, lime carbonate, kaolin and talcous weight summation≤35 parts.
The present invention uses in the propellant in the film forming of above-mentioned composition form, replace the glycerine that report uses in the document with polyoxyethylene glycol, the viscosity that test shows the fragility that can make behind the material filming and propellant solution in time and the phenomenon that increases is able to obvious improvement has improved accessibility and quality of forming film when its construction is used.As the talcum powder that strength materials uses, can also obviously improve the mechanical properties such as creep resistance of film forming layer.Test shows that also the white carbon black in the above-mentioned composition, lime carbonate, kaolin and talcous weight summation can cause certain disadvantageous effect to quality of forming film as surpassing 35 parts, as, can make the rete hardening, the index of aspects such as its elasticity and pull resistance all may descend.
The film forming of the present invention of above-mentioned form uses propellant when construction, though needn't get rid of the basic components in forming, the sharp reductive agent three class components of oxygenant are through different equipment or nozzle ejection and blended form use simultaneously respectively, but so that wherein said basic components is mixed the composition blending ingredients mutually with oxygenant, reductive agent is the form of the independent state that is separated from each other with it, or make said this basic components mix the composition blending ingredients mutually with reductive agent, oxygenant is the form of the independent state that is separated from each other with it, respectively the splashing device through having compound nozzle spray simultaneously and the blended type of service for well.During construction, after can calculating the cooperation consumption of kinds of ingredients according to the particular case of formation level, be delivered to spray gun by volume pump, go out with high pressure bump mixing jetting through compound nozzle, moment can form gel and be sent to processed basal plane and form the rete that is bonded in processed basal plane.
The film forming of the above-mentioned composition form of the present invention is low viscous water soluble liq with propellant at normal temperatures and pressures, and viscosity is at 30~500mPas, spraying operation and cleaning operation when its low viscosity characteristics will obviously help constructing.The result that test is used shows, because the bump mixing can take place and carry out polyreaction in each component in be ejected to the process that arrives processed basal plane by nozzle, rather than arrive and be attached to processed basal plane after just begin to react, therefore speed of response is exceedingly fast, short construction period, and the sagging phenomenon can not appear when being coated with in that facade is thick yet.Be generally for 2~5 seconds through surveying its polymerization film formation time, and can to form thickness at processed basal plane place be 2~3.5 millimeters water-fast membrane waterproofing, its surface drying time is general≤and 1 minute.The result who formed membrane waterproofing is carried out permeability test shows that each did not all have infiltration in 240 hours moving hydraulic pressure (0.3 MPa) and hydrostaticpressure.The tensile strength of formed membrane waterproofing can reach 2.23 MPas, unit elongation 514%, and 8.83 Ns/millimeter of tearing toughness, and have the indexs such as acidproof, alkaline-resisting and salt tolerant that meet national standard.Result on trial also shows, film forming of the present invention can both have good close property with propellant and multiple basal plane, the cohesive strength test result is: concrete surface 1.22 MPas, rock 0.36 MPa, even and processed basal plane when infiltration arranged construction do not have tangible influence to the spraying film forming yet.Use the result also to show, above-mentioned film forming propellant of the present invention can spray repeatedly on processed basal plane and not have demixing phenomenon and occur.In addition, detected result shows that also above-mentioned film forming of the present invention to human body and environmentally friendly, does not have the inflammable and explosive unsafe factor of Denging with propellant yet, and storage and transportation are not had special requirement yet.Environment and conditional request to spraying application are general also lower ,-15 ℃~50 ℃ temperature range, but and relative humidity be equal normal construction under 30~100% the condition.Therefore, above-mentioned film forming of the present invention is constructed with the anti-seep water that propellant is particularly suitable for Infrastructure such as tunnel and underground works are carried out, and helps improving operating efficiency, shortens construction period, makes construction more reasonable.
Below by specific embodiment foregoing of the present invention is described in further detail, but this should be interpreted as that the scope of the above-mentioned theme of the present invention is confined to following example.The usage quantity of each component raw material is weight ratio in the example.
The correlated performance of the composition of each example and institute's film forming layer thereof is compared as follows shown in the table.
Table: the composition of each example and film forming layer correlated performance thereof
Raw material is formed Example 1 Example 2 Example 3 Example 4 Example 5 Example 6
A liquid Basic components The 35% vinylformic acid magnesium aqueous solution ????100 ????100 ????100 ????100 ????100 ????100
Hydroxy ethyl fiber is disorderly ????0.2 ????0.2 ????0.2 ????0.2 ????0.2 ????0.2
White carbon black ????10 ????10 ????10 ????10 ????10 ????10
Lime carbonate ????10 ????10 ????5 ????5 ????5 ????5
Kaolin ????5 ????5 ????5 ????5 ????5 ????5
Talcum powder ????5 ????5 ????5 ????5 ????/ ????/
Polyoxyethylene glycol ????10 ????10 ????20 ????20 ????25 ????25
Tributyl phosphate ????0.2 ????0.2 ????0.2 ????0.2 ????0.2 ????0.2
Sodium bisulfite (reductive agent) ????0.2 ????0.2 ????0.2 ????0.2 ????0.1 ????0.1
B liquid Sodium Persulfate (oxygenant) ????0.5 ????0.5 ????0.75 ????0.75 ????1 ????1
Relevant film forming properties Gel time (second) ????5 ????5 ????3 ????3 ????1 ????1
The gel-film state With cement-bonded intensity (kgf/ cm 2) ????10 ????9.8 ????12 ????11.6 ????13 ????14.2
Permeable amount (ml) ????0 ????0 ????0 ????0 ????0 ????0
Envionmental humidity (%) ≥90 Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness
70~ 90 The intensity height, elasticity is relatively poor Intensity is higher, and elasticity is better Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness
50~ ?70 The intensity snappiness is poor The intensity snappiness is relatively poor The intensity snappiness is better Intensity is higher, good springiness Intensity is higher, good springiness Intensity is higher, good springiness

Claims (10)

1. be used to form the blasting materials of membrane waterproofing, with the vinylformic acid or derivatives thereof is film forming composition component, and contain oxygenant, reductive agent, aggregate filling components and auxiliary component and water, it is characterized in that this blasting materials is made up of basic components and oxygenant and reductive agent three class components, each component by weight is composed as follows:
(1) basic components:
100 parts of 25%~50% (weight) vinylformic acid magnesium aqueous solution,
Natvosol 0.2-0.3 part,
White carbon black 5-20 part,
Aggregate stopping composition 10-30 part,
Talcum powder 5-15 part,
Polyoxyethylene glycol 5-25 part,
Auxiliary interpolation component 0-0.5 part,
Wherein white carbon black, aggregate stopping composition and talcous weight summation≤35 parts,
(2) reductive agent 0.1-0.5 part,
(3) oxygenant 0.5-2 part.
2. the blasting materials that is used to form membrane waterproofing as claimed in claim 1 is characterized in that said aggregate stopping composition is lime carbonate and kaolin, and its weight consists of:
Lime carbonate 5-15 part, kaolin 5-15 part.
3. the blasting materials that is used to form membrane waterproofing as claimed in claim 1 is characterized in that the vinylformic acid Mg content in the said vinylformic acid magnesium aqueous solution is 35%.
4. the blasting materials that is used to form membrane waterproofing as claimed in claim 1, said complementary interpolation component is that weight is the antibacterial mildew inhibitor of 0-0.3 part in it is characterized in that forming.
5. the blasting materials that is used to form membrane waterproofing as claimed in claim 4 is characterized in that said antibacterial mildew inhibitor is at least a in sodium Diacetate, potassium sorbate, the Sodium Benzoate.
6. the blasting materials that is used to form membrane waterproofing as claimed in claim 1, said complementary interpolation component is that weight is the defoamer of 0.005-0.2 part in it is characterized in that forming.
7. the blasting materials that is used to form membrane waterproofing as claimed in claim 6 is characterized in that said defoamer is at least a in isopropylcarbinol, the tributyl phosphate.
8. as the described blasting materials that is used to form membrane waterproofing of one of claim 1 to 7, it is characterized in that forming by the component of following weight:
100 parts of 35% the vinylformic acid magnesium aqueous solution,
Natvosol 0.2-0.3 part,
10 parts of white carbon blacks,
10 parts of kaolin,
10 parts in lime carbonate,
10 parts of talcum powder,
Polyoxyethylene glycol 5-25 part,
0.3 part of sodium Diacetate,
Defoamer 0.005-0.2 part,
Reductive agent 0.1-0.5 part,
Oxygenant 0.5-2 part,
Wherein on white carbon black, lime carbonate, the high mountain range and talcous weight summation≤35 parts.
9. as the described blasting materials that is used to form membrane waterproofing of one of claim 1 to 7, mixes the composition blending ingredients with oxygenant when it is characterized in that said basic components is used, reductive agent is the independent state that is separated from each other with it.
10. as the described blasting materials that is used to form membrane waterproofing of one of claim 1 to 7, mixes the composition blending ingredients with reductive agent when it is characterized in that said basic components is used, oxygenant is the independent state that is separated from each other with it.
CNB001206451A 2000-12-29 2000-12-29 Sprayed material to form waterproof film Expired - Lifetime CN1163568C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB001206451A CN1163568C (en) 2000-12-29 2000-12-29 Sprayed material to form waterproof film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB001206451A CN1163568C (en) 2000-12-29 2000-12-29 Sprayed material to form waterproof film

Publications (2)

Publication Number Publication Date
CN1361225A true CN1361225A (en) 2002-07-31
CN1163568C CN1163568C (en) 2004-08-25

Family

ID=4588321

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB001206451A Expired - Lifetime CN1163568C (en) 2000-12-29 2000-12-29 Sprayed material to form waterproof film

Country Status (1)

Country Link
CN (1) CN1163568C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100395298C (en) * 2005-12-09 2008-06-18 西南交通大学 Main material of spraying film waterproofer with high extension strength and method for preparing the same
CN101429352B (en) * 2008-12-09 2012-02-08 成都市嘉洲新型防水材料有限公司 Quick polymerization accessible identical-size bi-component spray film water-proofing material and method of producing the same
CN104725911A (en) * 2015-04-08 2015-06-24 成都金嘉洲建材有限公司 Spraying film waterproof coating component B prolonging self polymerization time and preparation method thereof
CN105273549A (en) * 2015-11-19 2016-01-27 成都市嘉洲新型防水材料有限公司 Environmentally friendly spraying type fire extinguishing material and preparation method thereof
CN108178940A (en) * 2017-12-29 2018-06-19 北京东方雨虹防水技术股份有限公司 High-performance acrylic acid salt spray film water-proofing material and preparation method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100395298C (en) * 2005-12-09 2008-06-18 西南交通大学 Main material of spraying film waterproofer with high extension strength and method for preparing the same
CN101429352B (en) * 2008-12-09 2012-02-08 成都市嘉洲新型防水材料有限公司 Quick polymerization accessible identical-size bi-component spray film water-proofing material and method of producing the same
CN104725911A (en) * 2015-04-08 2015-06-24 成都金嘉洲建材有限公司 Spraying film waterproof coating component B prolonging self polymerization time and preparation method thereof
CN105273549A (en) * 2015-11-19 2016-01-27 成都市嘉洲新型防水材料有限公司 Environmentally friendly spraying type fire extinguishing material and preparation method thereof
CN105273549B (en) * 2015-11-19 2017-12-12 成都市嘉洲新型防水材料有限公司 A kind of environment-friendly spray coating type fire extinguishing material and preparation method thereof
CN108178940A (en) * 2017-12-29 2018-06-19 北京东方雨虹防水技术股份有限公司 High-performance acrylic acid salt spray film water-proofing material and preparation method thereof
CN108178940B (en) * 2017-12-29 2020-11-20 北京东方雨虹防水技术股份有限公司 High-performance acrylate spray film waterproof material and preparation method thereof

Also Published As

Publication number Publication date
CN1163568C (en) 2004-08-25

Similar Documents

Publication Publication Date Title
CN105419815B (en) A kind of polymeric soil curing agent
CN100395298C (en) Main material of spraying film waterproofer with high extension strength and method for preparing the same
CN104817997A (en) Solid dust suppressant
CN102140281B (en) Coating for protecting back face of stone
CN102775103A (en) Sodium silicate-containing polymer cement waterproof coating and preparation method thereof
CN102531458A (en) Anti-crack and anti-corrosion plasticizer composition and preparation method thereof
JP2010018798A (en) Aqueous epoxy resin coating and foaming agent type flame retardant coating composition for indoor and outdoor use
CN104583351A (en) Waterproof membrane with good adhesion to concrete
CN103159439A (en) Spray-coating sealing material for coal rock mass
CN100350005C (en) Coating material, use thereof and method for applying said coating material
CN104945967A (en) Spraying-film waterproof material capable of preventing splashing, and preparation and application method thereof
CN104479469A (en) Strong-toughness waterproof coating and preparation method thereof
CN1163568C (en) Sprayed material to form waterproof film
CN104774513A (en) Self-leveling VAE (vinyl acetate-ethylene) cement waterproof paint for slope surfaces and preparation thereof
KR101857522B1 (en) Construction equipment for soil reinforcement using biopolymer
JP5504414B1 (en) Repair method for concrete structures
JP6074484B1 (en) Water-stop agent composition and water leak stop method
CN103420642A (en) Abrasion-resisting mortar repairing material with high elasticity and construction technology
KR100791618B1 (en) Polymer cement paste and coating process thereof
KR20110117506A (en) Aqueous membrane waterproof agent for concrete structure and preparation process of the same
JP4916695B2 (en) Waterstop composition
CN1015254B (en) Water-proof cement
KR100559150B1 (en) Composition with nano level inorganic polymer for repairing crevis on concrete structure
JP7086406B2 (en) Concrete spraying method and nozzle unit
KR100911974B1 (en) Crack repair agent composition for construction and engineering structure and method of construction for repairing crack

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: XI-NAN JIATOONG UNIV.

Free format text: FORMER OWNER: YANG QIXIN

Free format text: FORMER OWNER: YANG QIXIN

Effective date: 20040924

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20040924

Address after: 610031 No. two, section 111, ring road, Chengdu, Sichuan, China

Patentee after: Southwest Jiaotong University

Address before: 610031 geotechnical center, School of civil engineering, southwest Jiao Tong Jiaotong University, Chengdu nine, Sichuan

Co-patentee before: Yang Qixin

Patentee before: Yang Qixin

ASS Succession or assignment of patent right

Owner name: CHENGDU INDUSTRY INVESTMENT GROUP CO.,LTD.

Free format text: FORMER OWNER: YANG QIXIN

Owner name: SCINCE PARK MANAGEMENT CO., LTD., SOUTHWEST JIAOTO

Free format text: FORMER OWNER: SOUTHWEST JIAOTONG UNIVERSITY

Effective date: 20100623

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 610031 NO.111, NORTH NO.1 SECTION, SECOND RING ROAD, CHENGDU CITY, SICHUAN PROVINCE TO: 610031 TOWER A, SCI-TECH PARK, SOUTHWEST JIAOTONG UNIVERSITY, NO.142, JIAODA ROAD, CHENGDU

TR01 Transfer of patent right

Effective date of registration: 20100623

Address after: 610031, A, Southwest Jiaotong University Science Park, No. 142, pay off road, Chengdu

Co-patentee after: Chengdu Venturecapital Co., Ltd.

Patentee after: Chengdu Southwest Jiaotong University Tech Park Management Co., Ltd.

Address before: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111

Co-patentee before: Yang Qixin

Patentee before: Southwest Jiaotong University

ASS Succession or assignment of patent right

Owner name: CHENGDU JIAZHOU NEW WATERPROOF MATERIALS CO., LTD.

Free format text: FORMER OWNER: CHENGDU NORTHWEST JIAO TONG UNIVERSITY SCIENGCE AND TECHNOLOGY GARDEN MANAGEMENT

Effective date: 20101228

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 610031 TOWER A, SOUTHWEST JIAOTONG UNIVERSITY SCIENCE PARK, NO.142, JIAODA ROAD, CHENGDU CITY TO: 610031 GROUP 6, FUJIANIAN VILLAGE, JINNIU TOWNSHIP, JINNIU DISTRICT, CHENGDU CITY, SICHUAN PROVINCE

TR01 Transfer of patent right

Effective date of registration: 20101228

Address after: 610031, Sichuan province Chengdu Jinniu District Jinniu Township pay home grinding village six groups

Co-patentee after: Chengdu Venturecapital Co., Ltd.

Patentee after: CHENGDU JIAZHOU NEW WATERPROOF MATERIALS CO., LTD.

Address before: 610031, A, Southwest Jiaotong University Science Park, No. 142, pay off road, Chengdu

Co-patentee before: Chengdu Venturecapital Co., Ltd.

Patentee before: Chengdu Southwest Jiaotong University Tech Park Management Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20040825

CX01 Expiry of patent term