CN106010366A - High-low-temperature-resistant tire repairing liquid and preparation method thereof - Google Patents
High-low-temperature-resistant tire repairing liquid and preparation method thereof Download PDFInfo
- Publication number
- CN106010366A CN106010366A CN201610485003.8A CN201610485003A CN106010366A CN 106010366 A CN106010366 A CN 106010366A CN 201610485003 A CN201610485003 A CN 201610485003A CN 106010366 A CN106010366 A CN 106010366A
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- repairing fluid
- low temperature
- tyre repairing
- tire
- temperature resistant
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J107/00—Adhesives based on natural rubber
- C09J107/02—Latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1535—Five-membered rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/12—Materials for stopping leaks, e.g. in radiators, in tanks
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
Abstract
The invention discloses high-low-temperature-resistant tire repairing liquid. The high-low-temperature-resistant tire repairing liquid can meet the working requirements within the temperature range of -40 DEG C to 70 DEG C. The tire repairing liquid can be directly input into a tire via a valve core through a small compressor, and the tire repairing liquid is easy to operate, safe, sanitary, rapid and particularly suitable for being used by females. The tire repairing liquid has no harm to the tire and does not affect normal use of a TPMS.
Description
Technical field
The present invention relates to a kind of macromolecule synthesising technology field, particularly relate to a kind of high-low temperature resistant tyre repairing fluid and preparation thereof
Method.
Background technology
The tire overwhelming majority that present stage uses is the vacuum tyre of inflation, after being punctured by the nail on road surface or hard thing,
Can cause acute disappointing, the lighter is cast anchor, and severe one is likely to result in overturning, and causes the major accident of car crash.Traditional tire patching
Agent will be through unloading wheel, taking off the series of processes such as tire, tire patching, and formality is numerous and diverse, the most time-consuming, time the most in the wild with high speed traveling,
Not possessing tire patching condition, tire is basic after being stung just cannot continue traveling.
In order to solve the problems referred to above, Crinis Carbonisatus is had to understand tire repair cement, most employing polyvinyl acetate emulsions or polyvinyl alcohol
Solution, is equipped with starch, cellulose and inorganic filler etc., seals composition more single, mobility, stability, non-oxidizability and gluing
Property can not meet requirement.Such as Chinese patent 90109738.1, using natural is base material with synthetic adhesive, with the addition of various reinforcement
Agent, age resistor etc., well improve tyre repairing fluid sealing and ageing-resistant performance, but use fibre bundle and inorganic filler to mend
Strong material, gradually can solidify at tire inner wall, worn tire.Some tyre repairing fluid may contain acidic materials, such as Application No.
The patent of 91104114.1, the mending agent made with raw stock, banana oil, gasoline, bluestone powder, Calx and sulphuric acid, although mend
Tire effect is fine, but owing to containing sulphuric acid, the inner tube of a tyre or valve cock etc. being had the strongest corrosiveness, and is not suitable under low temperature
Use.Use organic filler, the friction damage to tire can be reduced, as Chinese patent 96108493.6 uses tire harmless
Natural rubber granule reinforcement, can reach permanent healing with tire.Need when but natural rubber uses to soak in toluene, make
It expands softening, and tire can become fragile after the toluene absorbing micelle release, easily ftractures, moreover toluene is dangerous materials, it is easy to
Blast.
In order to solve the problem of inflation simultaneously, having Crinis Carbonisatus to understand tyre repair aerosol, it can make to break very easily
Deflated tire mends rapidly, reaches inflation performance, it is not necessary to take off the operations such as tire simultaneously, directly by propellant by tyre repairing fluid edge
Valve cock to fill tire agent and rotate and several enclose.But traditional tire patching aerosol, some can only make the tire lost heart temporarily fill
Will also result in chronic disappointing after gas, even a period of time；Some cryoprotective effects is very poor, such as Chinese patent 92109046.3；Tire patching
Speed is slow；Propellant is flammable, or the shortcoming such as damage the ozone layer, and is not widely used.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes a kind of high-low temperature resistant tyre repairing fluid, and this product is permissible
Normally work under conditions of subzero 40-70 DEG C, reach the effect of instant tire patching.
A kind of high-low temperature resistant tyre repairing fluid, including the main component of following percentage by weight:
Nature rubber latex 45-60%
Dispersant 15-25%
Antioxidant 3-5%
Surfactant 2-6%
Graphene 0.003-0.005%
Oxolane 0.3-0.8%
Ethylene glycol surplus.
Preferably, the solid content of described nature rubber latex is 54-56%.
Preferably, described dispersant is sodium methylene bis-naphthalene sulfonate.
Preferably, described antioxidant is hindered phenol anti-oxidants and Butylated hydroxyanisole.
Preferably, described surfactant is dodecylbenzene sodium sulfonate.
The preparation method of a kind of high-low temperature resistant tyre repairing fluid, comprises the following steps:
A, nature rubber latex is poured in agitator, under the mixing speed of 120-150rpm, stir 20-30min；
B, regulation mixing speed, to 200-250rpm, add surfactant and antioxidant, continue stirring 15-20min；
C, it is passed through ammonia, adds dispersant and oxolane, continue stirring 20-30min；
D, regulation mixing speed, to 350-400rpm, add ethylene glycol and Graphene, continue stirring 45-60min, seal fill i.e.
Can.
Preferably, above described agitator, install ammonia recycling device additional, ammonia is carried out recycling.
High-low temperature resistant tyre repairing fluid of the present invention, it is adaptable to the vacuum tyre of gas leakage, it is this that general tyre surface is pricked aperture 6mm
The reparation limit (this is the biggest nail or screw, generally, seldom encounters) of tyre repairing fluid, in use, by tire patching
Flow container body one end is connected with compressor trachea, and the other end is connected with the valve of tire, and after starting compressor, gas is first by tank
Tyre repairing fluid in body head into tire (can complete in the 40s time under room temperature, even under conditions of subzero 40 DEG C, tyre repairing fluid
Viscosity is greatly increased, and the time is not more than 3min), then proceed to add in tire by gas, until tire pressure reaches
The pressure of regulation, then disconnects the valve of tyre repairing fluid tank body with tire, starts automobile, transports with the speed of 40-80km/h
Row automobile, can mend the tire of gas leakage within 15km.
Traditional tyre repairing fluid in use, is typically adopted manually, inputs in tire by tyre repairing fluid lentamente, the party
The defect of formula is: one is time-consuming, laborious, and two is troublesome poeration, particularly disadvantageous to the Ms driver of individually trip.
But traditional tyre repairing fluid cannot meet the requirement that tyre repairing fluid directly inputs tire with compressor, main cause exists
In, the valve of tire has valve inside, and the internal structure of valve inside has spring, when nature rubber latex is at the pressure of gas
Under, during by valve inside, easily can cohere on spring, thus valve inside is blocked, it is impossible to normally tyre repairing fluid be fully entered
Tire is interior or affects the follow-up process to tire supercharging.The most at high temperature, nature rubber latex is easier to occur to stick
Knot.
If adding substantial amounts of stabilizer in tyre repairing fluid, it is ensured that tyre repairing fluid can safety by valve inside, but
Being that this is very big to the tire patching influential effect of tyre repairing fluid, the most at low temperatures, the film-formation result of nature rubber latex is the most relatively
Difference, adds substantial amounts of stabilizer, bigger on the impact of its film-formation result, therefore in the present invention, by adding Graphene, utilizes graphite
The single layer structure of alkene, can be nature rubber latex film forming provide suitable support, simultaneously Graphene possess extraordinary by force
Degree and minimum aperture, film forming rear tyre is difficult to gas leakage.
Adding oxolane and can promote Graphene dispersion effect in tyre repairing fluid, under low temperature, tire patching effect is more preferable.
It is passed through ammonia, the effect of stabilizer can be played, nature rubber latex is had certain protected effect.
The high-low temperature resistant tyre repairing fluid that the present invention provides, can meet the job requirement in the range of subzero 40-70 DEG C, both may be used
With in the normal use of cold Russia and Hokkaido, Japan area, it is also possible to normally use in hot desert region, pass through
The normal use of product also will not be impacted by hot and humid Container Transport；Overcome traditional hands in use simultaneously
Flowing mode, it is possible to use tyre repairing fluid is directly input in tire by light duty compressor by valve inside, simple to operate, safely, defends
Raw, quick, it is particularly suitable for Ms and uses；The tyre repairing fluid of the present invention does not has any injury to tire itself, but after a procedure, it is proposed that
Tire unloaded in regular repairing structure and cleans in one week, with usual manner, hole is repaired；The tire patching of the present invention
Liquid does not has any impact to normal use of TPMS.
Detailed description of the invention
Embodiment 1:
A kind of high-low temperature resistant tyre repairing fluid, including the main component of following percentage by weight:
Nature rubber latex 50%
Dispersant 20%
Antioxidant 4%
Surfactant 5%
Graphene 0.004%
Oxolane 0.5%
Ethylene glycol surplus.
The solid content of described nature rubber latex is 54-56%.
Described dispersant is sodium methylene bis-naphthalene sulfonate.
Described antioxidant is hindered phenol anti-oxidants and Butylated hydroxyanisole, and mass ratio is 1:(3-5).
Described surfactant is dodecylbenzene sodium sulfonate.
The preparation method of a kind of high-low temperature resistant tyre repairing fluid, comprises the following steps:
A, nature rubber latex is poured in agitator, under the mixing speed of 135rpm, stir 25min；
B, regulation mixing speed, to 220rpm, add surfactant and antioxidant, continue stirring 18min；
C, it is passed through ammonia, adds dispersant and oxolane, continue stirring 25min；
D, addition ethylene glycol and Graphene, continue stirring 50min, seal fill.
Embodiment 2:
A kind of high-low temperature resistant tyre repairing fluid, including the main component of following percentage by weight:
Nature rubber latex 60%
Dispersant 15%
Antioxidant 3%
Surfactant 2%
Graphene 0.005%
Oxolane 0.8%
Ethylene glycol surplus.
The solid content of described nature rubber latex is 54-56%.
Described dispersant is sodium methylene bis-naphthalene sulfonate.
Described antioxidant is hindered phenol anti-oxidants and Butylated hydroxyanisole.
Described surfactant is dodecylbenzene sodium sulfonate.
The preparation method of a kind of high-low temperature resistant tyre repairing fluid, comprises the following steps:
A, nature rubber latex is poured in agitator, under the mixing speed of 150rpm, stir 30min；
B, regulation mixing speed, to 200rpm, add surfactant and antioxidant, continue stirring 15min；
C, it is passed through ammonia, adds dispersant and oxolane, continue stirring 30min；
D, regulation mixing speed, to 350rpm, add ethylene glycol and Graphene, continue stirring 45min, seal fill.
Embodiment 3:
A kind of high-low temperature resistant tyre repairing fluid, including the main component of following percentage by weight:
Nature rubber latex 45%
Dispersant 25%
Antioxidant 5%
Surfactant 6%
Graphene 0.003%
Oxolane 0.3%
Ethylene glycol surplus.
The solid content of described nature rubber latex is 54-56%.
Described dispersant is sodium methylene bis-naphthalene sulfonate.
Described antioxidant is hindered phenol anti-oxidants and Butylated hydroxyanisole.
Described surfactant is dodecylbenzene sodium sulfonate.
The preparation method of a kind of high-low temperature resistant tyre repairing fluid, comprises the following steps:
A, nature rubber latex is poured in agitator, under the mixing speed of 120rpm, stir 20min；
B, regulation mixing speed, to 250rpm, add surfactant and antioxidant, continue stirring 20min；
C, it is passed through ammonia, adds dispersant and oxolane, continue stirring 20min；
D, regulation mixing speed, to 400rpm, add ethylene glycol and Graphene, continue stirring 60min, seal fill.
The sample of embodiment 1-3 is applied to practical operation, the tire of the passenger cars of 7 nail of diameter 6mm is pricked
One hole, extracts nail, until tire pressure is 0, is connected with compressor trachea tyre repairing fluid tank body one end, the other end and tire
Valve be connected, start after compressor, the tyre repairing fluid in tank body is first headed into tire by gas, then proceedes to add to gas
In tire, until tire pressure reaches 40psi, then the valve of tyre repairing fluid tank body with tire is disconnected, start automobile, with
Whether the speed of 60km/h runs automobile, leak gas with suds detection hole, detect once every 2min after 3min, until
Air tight.
Described subzero 40 DEG C is tank body and tire freezing more than 12h under the conditions of subzero 40 DEG C of tyre repairing fluid, after taking-up,
Test under the outdoor conditions of subzero less than 10 DEG C；70 DEG C are the tank body of tyre repairing fluid and tire heats under the conditions of 70 DEG C
More than 12h, after taking-up, tests under the outdoor conditions more than 30 DEG C；Degradation is that tyre repairing fluid tank body is placed on 70 DEG C
Under the conditions of baking oven in take out after aging 3 months, at room temperature preserve and test after 24h.
Concrete detection data are as follows:
Table 1:
By test data it is recognised that the tyre repairing fluid of the present invention is the most permissible under room temperature, the maximum conditions of subzero 40 DEG C and 70 DEG C
Reach extraordinary tire patching effect.
In experiment, use the tire (including Special anti-skid tire) of 7 kinds of different brands such as Han Tai, Deng Lupu, Michelin, tire patching
Effect difference is little.
It is below comparative example, each raw material in the present invention is further analyzed.
Comparative example 1
Being removed by Graphene in the embodiment of the present invention 1, remaining preparation condition is constant.
Comparative example 2
Being removed by oxolane in the embodiment of the present invention 1, remaining preparation condition is constant.
Comparative example 3
Being removed by hindered phenol anti-oxidants in the embodiment of the present invention 1, remaining preparation condition is constant.
Comparative example 4
Being removed by Butylated hydroxyanisole in the embodiment of the present invention 1, remaining preparation condition is constant.
Comparative example 5
To not be passed through ammonia in the preparation process of the embodiment of the present invention 1, remaining preparation condition is constant.
The sample of comparative example 1-5 is tested, and and the test data of embodiment 1 contrast, test result
As follows:
Table 2:
By above comparative example it is recognised that do not use Graphene maximum to the tire patching influential effect of tyre repairing fluid under low temperature, right
The influential effect of room temperature and high temperature is little.
Not using hindered phenol anti-oxidants, at high temperature, tyre repairing fluid cannot normally use.
Do not use oxolane, Butylated hydroxyanisole and in preparation process, be added without the ammonia use to tyre repairing fluid
All there is impact in various degree.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (7)
1. a high-low temperature resistant tyre repairing fluid, it is characterised in that include the main component of following percentage by weight:
Nature rubber latex 45-60%
Dispersant 15-25%
Antioxidant 3-5%
Surfactant 2-6%
Graphene 0.003-0.005%
Oxolane 0.3-0.8%
Ethylene glycol surplus.
High-low temperature resistant tyre repairing fluid the most according to claim 1, it is characterised in that the solid content of described nature rubber latex
For 54-56%.
High-low temperature resistant tyre repairing fluid the most according to claim 1, it is characterised in that described dispersant is di-2-ethylhexylphosphine oxide naphthalene sulphur
Acid sodium.
High-low temperature resistant tyre repairing fluid the most according to claim 1, it is characterised in that described antioxidant is that Hinered phenols resists
Oxidant and Butylated hydroxyanisole.
High-low temperature resistant tyre repairing fluid the most according to claim 1, it is characterised in that described surfactant is dodecyl
Benzene sulfonic acid sodium salt.
6. the preparation method of a high-low temperature resistant tyre repairing fluid, it is characterised in that comprise the following steps:
A, nature rubber latex is poured in agitator, under the mixing speed of 120-150rpm, stir 20-30min；
B, regulation mixing speed, to 200-250rpm, add surfactant and antioxidant, continue stirring 15-20min；
C, it is passed through ammonia, adds dispersant and oxolane, continue stirring 20-30min；
D, regulation mixing speed, to 350-400rpm, add ethylene glycol and Graphene, continue stirring 45-60min, seal fill i.e.
Can.
The preparation method of high-low temperature resistant tyre repairing fluid the most according to claim 6, it is characterised in that on described agitator
Side, installs ammonia recycling device additional, ammonia is carried out recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610485003.8A CN106010366A (en) | 2016-06-28 | 2016-06-28 | High-low-temperature-resistant tire repairing liquid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610485003.8A CN106010366A (en) | 2016-06-28 | 2016-06-28 | High-low-temperature-resistant tire repairing liquid and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106010366A true CN106010366A (en) | 2016-10-12 |
Family
ID=57084502
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610485003.8A Pending CN106010366A (en) | 2016-06-28 | 2016-06-28 | High-low-temperature-resistant tire repairing liquid and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106554529A (en) * | 2016-11-28 | 2017-04-05 | 杭州金知科技有限公司 | A kind of low temperature resistant vacuum tyre repairing fluid and preparation method thereof |
| CN107779123A (en) * | 2017-10-15 | 2018-03-09 | 深圳市希顺有机硅科技有限公司 | A kind of automatic mending tyre liquid and preparation method thereof |
| CN107955228A (en) * | 2017-12-16 | 2018-04-24 | 长沙无道工业设计有限公司 | A kind of mending agent and preparation method thereof |
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|---|---|---|---|---|
| CN102070998A (en) * | 2010-12-14 | 2011-05-25 | 浙江工业大学 | Automatic inflation tyre-repairing solution |
| CN102532629A (en) * | 2011-12-30 | 2012-07-04 | 北京化工大学 | Preparation method of completely peeled oxidation graphene/ rubber nanometer composite material |
| CN104416927A (en) * | 2013-08-29 | 2015-03-18 | 章成荣 | Leakproof efficient tyre repairing agent |
| CN104877615A (en) * | 2015-03-10 | 2015-09-02 | 聊城金歌合成材料有限公司 | Polyurethane adhesive for rubber tyres and preparation method thereof |
-
2016
- 2016-06-28 CN CN201610485003.8A patent/CN106010366A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070998A (en) * | 2010-12-14 | 2011-05-25 | 浙江工业大学 | Automatic inflation tyre-repairing solution |
| CN102532629A (en) * | 2011-12-30 | 2012-07-04 | 北京化工大学 | Preparation method of completely peeled oxidation graphene/ rubber nanometer composite material |
| CN104416927A (en) * | 2013-08-29 | 2015-03-18 | 章成荣 | Leakproof efficient tyre repairing agent |
| CN104877615A (en) * | 2015-03-10 | 2015-09-02 | 聊城金歌合成材料有限公司 | Polyurethane adhesive for rubber tyres and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106554529A (en) * | 2016-11-28 | 2017-04-05 | 杭州金知科技有限公司 | A kind of low temperature resistant vacuum tyre repairing fluid and preparation method thereof |
| CN107779123A (en) * | 2017-10-15 | 2018-03-09 | 深圳市希顺有机硅科技有限公司 | A kind of automatic mending tyre liquid and preparation method thereof |
| CN107955228A (en) * | 2017-12-16 | 2018-04-24 | 长沙无道工业设计有限公司 | A kind of mending agent and preparation method thereof |
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Application publication date: 20161012 |