CN102391816B - High-temperature repairing agent - Google Patents
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- CN102391816B CN102391816B CN 201110311983 CN201110311983A CN102391816B CN 102391816 B CN102391816 B CN 102391816B CN 201110311983 CN201110311983 CN 201110311983 CN 201110311983 A CN201110311983 A CN 201110311983A CN 102391816 B CN102391816 B CN 102391816B
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Abstract
The invention provides a high-temperature repairing agent and a preparation method thereof. The repairing agent has high bonding strength and good high temperature/oil/water/medium resistance and insulating property and is mainly used for repairing wear and scratches of parts, bonding ruptures, sealing and plugging various pipelines, filling blowholes and sand holes on iron castings and steel castings, sealing high-temperature valves and engine cylinder heads and repairing drying cylinders on paper machines under high-temperature working condition.
Description
Technical field
The present invention relates to a kind of high-temperature reparation agent, especially a kind of high temperature resistant, wear-resisting, anticorrosive pair of component response type healant that adopts epoxide modified interpolation high duty alloy and pottery to be mixed with.
Background technology
Surface Engineering is paid much attention to day by day as the important means of maintenance.As Surface Engineering subject important component part n9 sufacing, the surface recovery technique comprises that platings, brush plating, thermospray, bonding gluing are coated with etc., these restorative procedures replenish mutually, become the means emergency schedule of maintenance of equipment necessity, repair scrapped parts, old part is come back to life, and for enterprise retrieves the tremendous economic loss, maintenance of equipment has become the organic component of productivity.
The surface cohering technology in recent years, has been brought into play significant role and has been obtained good social benefit and huge economic benefit as representing one of surface technology in the maintenance of equipment field.
The surface cohering technology is compared with built-up welding, thermospray, brush plating, its technology is easy, do not need Special Equipment, need not to consume heat energy and electric energy, only need the face of repairing watch of waiting that it is good that the healant for preparing is coated on cleaning is got final product, solidify the back as hard as the metal, can carry out various mechanical workouts, satisfy that part is wear-resisting, anti-corrosion, maintenance needs such as resizing, defective are filled up, sealing and plugging.General ambient temperature curable does not have heat affected zone and thermal distortion to part, but and site work, reduce stop time.Its time and labour saving, save energy and substantial contribution are a kind of quick and inexpensive repairing techniques, are the effective means of maintenance of equipment, will develop into important one of the surface technology of representing.
Metal repairing agent is the gordian technique of surface cohering and splicing in the maintenance of equipment; it is by high molecular polymer and metal-powder; ceramic powder and fibrous pair of component (or many components) clay shape matrix material; it is wear-resistant to be widely used in part; the high temperature reparation is with pre-supercoat and be used for repairing the various defectives of part (as crackle; scratch; dimension overproof; blow hole; sand holes) and sealing and plugging etc.; its technology is simple and easy to do; only need two components are mixed in proportion; be coated on through rust cleaning; the surface of oil removing; solidifying the back finishing gets final product; be a kind of saving of labor; save time; economical; durable; flexibly; convenient; desirable novel patching material is one of matrix material at present with fastest developing speed.
This patching material abroad just begins one's study from the fifties end, U.S. Belzona high polymer alloy healant for example, Germany Diamant product is also world-famous, can be used to repair various materials, can be used for repairing metal, rubber, pottery etc., can select the healant of the different trades mark according to conditions such as different use temperatures, pressure, media for use.The MEcATeC product of Switzerland Castolin company also has tens kinds, has obtained using widely in the maintenance of equipment of multiple industries such as casting, cement, sugaring, railway, electronics.In addition, fill up agent, wear-resisting glue though more domestic units develop some metals, performance can't satisfy the service requirements of maintenance of equipment.The patching material of above-mentioned external development, though performance is higher than home products, China's the eighties was just once used German Diamant product to tank track kiss-coating plate, but intensity, heat resistance still are difficult to reach the requirement of the equipment of repairing performance requriements harshnesses such as war industry equipment or intensity, and the price of import healant and costliness thereof, consume a large amount of foreign exchanges, cause enterprise aspect maintenance of equipment, to consume a huge sum of money.
The serial high-temperature reparation agent bonding strength height of the present invention's development, high temperature resistant, oil resistant, water-fast, media-resistant, good insulation preformance, be mainly used in the reparation of parts depreciation under the worst hot case condition, scuffing, what rupture is bonding, various seal for pipe joints leak stopping, cast iron, steel casting pore, sand holes fill up high temperature valve sealing, engine cylinder cover sealing, paper machine dryer reparation etc.
Summary of the invention
The composition of healant can be divided into sizing, solidifying agent, toughner, particular fillers, thinner, coupling agent, anti-aging agent, thixotropic agent, defoamer, promotor etc.Sizing is selected Resins, epoxy, resol, unsaturated polyester, urethane, silicone resin etc. for use, and filler can be divided into metal-powder (as iron powder, aluminium powder, copper powder, lead powder etc.), ceramic powder (WC, SiC, A1
2O
3, BC, Cr
2O
3, SiO
2, quartz sand etc.) and graphite, MoS
2, high-temperature materials such as polytetrafluoroethylene.Two two component healants, two components are mixed use by a certain percentage during coating, generally are made up of sizing, solidifying agent and filler (abbreviation particular fillers) and subsidiary material with certain characteristic (wear-resisting, against corrosion, insulation, conduction etc.).
1, sizing
Or the title base-material, as thermosetting resin, synthetic rubber etc.Thermosetting resin such as epoxy, phenolic aldehyde, urethane, unsaturated polyester, acrylic acid ester etc. have the three-dimensional crosslinking structure, and are heat-resisting, water-fast, resistance to medium is good, use more in healant.
The effect of sizing is the various materials in the healant to be contained and stick to matrix surface securely to form coating, therefore, and for the sizing of adhesive coating layer should have following performance:
(1) coated matrix and filler there is higher binding strength.
(2) cured article should have higher physical strength and good heatproof, oil resistant, chemically-resistant and ageing resistance, and its Young's modulus and stability want high.
(3) the cured article shrinking percentage is little.
2, solidifying agent
The effect of solidifying agent is and sizing generation chemical reaction, forms netted space polymer, and the filler envelope in the body of dictyosome, is formed the crosslinked combination of three-dimensional.
Requirement with solidifying agent is generally to healant:
(1) cured article hardness height, good toughness, wear resistance is good, and solidity to corrosion, medium-resistance are good etc.
(2) preferably can self-vulcanizing, set time is short.
Healant of the present invention is generally amine curing agent with solidifying agent, adopts aminated compounds as solidifying agent, makes healant that higher degree of cure and outstanding resistance toheat be arranged.
3, particular fillers
Particular fillers plays important effect in healant, as wear-resistant high temperature, anti-corrosion, insulation, conduction etc.Therefore the selection of particular fillers is most important to the performance of coating, needs and the chemical terms consideration from maintenance, filler is required be:
(1) filler should be neutral or weakly alkaline, does not contain in conjunction with water, and is good with the sizing affinity, and liquid is not had adsorptivity or adsorptivity is seldom arranged.
(2) filler absorption impurity enough thermotolerances and certain purity will be arranged, if can cause the resin degraded.
(3) require particle or grain density little, scattered, sedimentation is little in resin.
The healant filler comprises powder or the fiber with a certain size; as hard particles such as metal-powder, oxide compound, carbide, nitride even diamond, boride or fiber, graphite, molybdenumdisulphide, polytetrafluoroethylene etc., according to the wear-resistant filler of the optional hard of different coatings.
4, subsidiary material
Subsidiary material comprise toughner, plasticity, thinner, curing catalyst, coupling agent, defoamer, anti-aging agent etc., its effect be improve coating performance such as toughness, resistance to deterioration etc. and reduce glue viscosity, improve coating quality etc.
According to above-mentioned four kinds of component roles, according to different working conditionss and performance requriements, through testing preferred suitable material and proportioning, the healant of preparation various requirement.
In addition, the present invention also provides the production method of above-mentioned high-temperature reparation agent.
The invention provides a kind of high-temperature reparation agent, mixed by A component and B component, wherein the A component is Resins, epoxy E44, dibutylester, nickel powder, iron powder, aluminium sesquioxide, Stainless Steel Powder, titanium dioxide and white carbon black; The B component is 105 contracting amine hardeners, KH550 silane coupling agent, DMP-30(2,4,6-three (dimethylamino methyl) phenol), aluminium sesquioxide and white carbon black; The weight proportion of A component and B component is 4:1 ~ 6:1, is preferably 5:1.
The prescription that adopts in the concrete production process is as follows: the A component is Resins, epoxy E44 2256g, dibutylester 102g, nickel powder 612g, iron powder 612, aluminium sesquioxide 608g, Stainless Steel Powder 408g, titanium dioxide 610g and white carbon black 200g; The B component is 105 contracting amine hardener 65g, KH550 silane coupling agent 410g, DMP-30(2,4,6-three (dimethylamino methyl) phenol) 613g, aluminium sesquioxide 60g, white carbon black 1200g; The use of healant is 4:1 ~ 6:1 with above-mentioned A, B component by weight ratio, and the ratio that is preferably 5:1 takes by weighing, and mixes.
High-temperature reparation agent by the said ratio preparation, be high temperature resistant, wear-resisting, the anticorrosive pair of component response type healant that adopts epoxide modified interpolation high duty alloy and pottery to be mixed with, A component master glue is Dark grey clay shape, and B component solidifying agent is light yellow clay shape, and the cured glue layer is Dark grey.This product bonding strength height, high temperature resistant, oil resistant, water-fast, media-resistant, good insulation preformance, be mainly used in the reparation of parts depreciation under the worst hot case condition, scuffing, what rupture is bonding, various seal for pipe joints leak stopping, cast iron, steel casting pore, sand holes fill up high temperature valve sealing, engine cylinder cover sealing, paper machine dryer reparation etc.
The preparation method of high-temperature reparation agent of the present invention comprises the steps:
1. use area of computer aided coating formula optimization design, obtain the prescription of above-mentioned healant;
At first starting material have been carried out preferably, by a large amount of simultaneous tests, and then the factor such as filling kind, filling adding amount, filler granularity, solidifying agent, toughner kind and the add-on that influence coating abrasion performance, hardness, intensity carried out single factor experiment, determined the optimum range of each composition, with the design of computer assistant coating formulation optimization, obtain optimum formula at last.
The process that the area of computer aided coating is optimized is as follows: the design of variable factor level---formula test------prescription optimization---optimization formula of setting up mathematical model.
By the result as can be known, the high-temperature reparation agent coating formula performance of computer aided optimum obviously improves, and compares with the prescription of general extremum method optimization, improves 20% approximately.
2. starting material are anticipated;
1) starting material in bulk and that make moist is dried down at 100 ℃;
2) starting material to thickness add heat gain flowability, but temperature can not surpass 60 ℃, in case rotten;
3) to coarse grained pulvis starting material, grind and sieve and get fine particle materials;
3.A, the preparation of B component
Take by weighing A component starting material by prescription, Resins, epoxy E44 and dibutylester are placed duplicate rows star dynamic mixing still, be heated to 90 ℃, stir 30min, add nickel powder, iron powder, Stainless Steel Powder, aluminium sesquioxide, titanium dioxide and white carbon black, high-speed stirring 30min is cooled to 40 ℃ then to mixing, vacuumize and stirring at low speed 20min, it is standby to obtain the A component;
Take by weighing B component starting material by prescription, 105 contracting amine hardeners, KH550 silane coupling agent and DMP-30 are placed duplicate rows star dynamic mixing still, mix and stir 30min, add aluminium sesquioxide and white carbon black and continue to stir 30min to mixing, vacuumize then and stirring at low speed 20min, it is standby to obtain the B component;
4. the preparation of healant
Be 4:1 ~ 6:1 by weight ratio with above-mentioned A, B component, the ratio of preferred 5:1 takes by weighing, stir and to use after trembling evenly, the glue for preparing is about 20 ℃ of room temperatures, be preferably in 30 ~ 40min and use up, influence in order to avoid viscosity increases tackiness agent with by the infiltration of sticking part with stickingly be coated with effect, join the glue amount and how much decide matching while using on correction of the defect is big or small.
Under the concrete preparation steps:
1), treats and repair the position with hand-operated tools such as file, hand operated grinding wheel, sand paper, rotation file polishings alligatoring (can see fresh metal level for well);
2), treat and repair the position, with acetone degreasing, oil removing, purification;
3), treat and repair the position uniform gluing; Reserve process redundancy (with glue cutter or scraper plate the tackiness agent that mixes is applied to face to be repaired watch, is coated with a small amount of glue earlier, press repeatedly, make healant fully soak into piece surface, the more surplus glue of coating), useable glass cloth, steel plate strengthen in case of necessity;
4), be coated with adhesive curing.But solidify mechanical workout after about 6 ~ 8 hours in the time of 25 ℃, came into operation in 24 hours.The suggestion curing process:
Hang l ~ 2 hour behind the gluing, be heated to 30 ~ 40 ℃ with hot-plate, heating collar or infrared lamp and kept 1 hour, be warming up to 50 ~ 60 ℃ of insulations 2 ~ 3 hours again, should lower the temperature slowly to prevent then that glue-line from becoming fragile;
5), available manual grinding or machine add to and require size and shape behind the curable adhesive layer.
Precaution
Take out than the ratio weighing of A:B=5:l (volume ratio is 3.5:1) in two constituent masses, can use after the mixing and stirring.The glue for preparing is when 20 ℃ of left and right sides of room temperature, and best 30min uses up with interior, in order to avoid gelatin viscosity increases and influences tackiness agent and be coated with effect by the infiltration of sticking part and bonding gluing, joins the glue amount and how much decides matching while using on the correction of the defect size.If temperature is low, the single component viscosity of glue is bigger, mixes after can with thermals source such as calorifier, tungsten-iodine lamps it being preheating to 30 ~ 40 ℃ earlier before mixing again.Avoid temperature to be lower than 5 ℃, relative air humidity is greater than joining the glue applying glue under 90% the environment.
Beneficial technical effects of the present invention is:
1, cured article has higher resistance to elevated temperatures, is mainly used in the reparation of part under the worst hot case condition; 2, coated matrix there is higher binding strength.
Description of drawings
Fig. 1 is tension specimen;
Fig. 2 is for shearing sample;
Fig. 3 is the resistance to compression sample;
Fig. 4 is the wearing test sample.
Embodiment
Be further described in detail below in conjunction with the present invention of embodiment 1-3, but the present invention never is confined to these embodiment.
Embodiment 1-3
The A component is Resins, epoxy E44 2256g, dibutylester 102g, nickel powder 612g, iron powder 612, aluminium sesquioxide 608g, Stainless Steel Powder 408g, titanium dioxide 610g and white carbon black 200g; The B component is 105 contracting amine hardener 65g, KH550 silane coupling agent 410g, DMP-30(2,4,6-three (dimethylamino methyl) phenol) 613g, aluminium sesquioxide 60g, white carbon black 1200g; The use of healant for the ratio of 4:1 ~ 6:1 takes by weighing, mixes above-mentioned A, B component by weight ratio.The concrete proportioning of each embodiment is as shown in table 1.
Table 1
| |
1 | 2 | 3 |
| The trade mark | TG736 | TG737 | TG738 |
| A, B ratio | 4:1 | 5:1 | 6:1 |
Tensile strength, tensile shear strength, compressive strength, hardness, wear resistance, 7 performance index of high warm nature and temperature tolerance are tested by the Ministry of Chemical Industry and national standard, and testing method and test result are as follows:
3.1 tensile strength
(1) testing method:
1, sample (specimen shape, size are as shown in Figure 1)
Attention: the splicing face of sample should be the plane, and vertical with the main shaft of sample; Adhesively bonded joint should use the tackiness agent of capacity, and makes the glue of slightly having a surplus around the joint, avoids occurring starved joint, and excessive glue needn't be removed usually.
2, testing installation:
Puller system should make the sample failure load at 10%～90% of pulling force full range, and the measuring error of puller system is not more than 1%, and puller system should be able to increase load in constant speed ground.
3, test conditions:
When not having particular requirement, the test conditions of recommending by GB2918 carries out, and namely temperature is 23 ± 2 ℃, relative humidity (50 ± 5) %.
4, test-results:
(1) tensile strength is calculated by formula (1):
Maximum load (N) when P one sample destroys;
A one bond area (mm2).
(2) unless regulation is arranged in the adhesive products standard in addition, tensile strength values is in five efficiency test results' arithmetical av.
(2) test result
Tensile strength test the results are shown in Table 2.
Table 2 tensile strength test result
3.2 tensile shear strength
Testing method:
1, sample
On the specimen shape to the greatest extent cun as shown in Figure 2.
2, testing installation
(1) trier of Shi Yonging should make sample destruction load the full scale load 15%～85% between, the power value indication error of trier should be greater than 1%, trier should guarantee that the translational speed of specimen holder keeps stablizing among 5 ± 1mm/1min;
(2) glueing joint the tinsel surface of usefulness should be smooth, the bending that do not have, lifts up song, distortion such as crooked.Tinsel should not have burr, and the edge keeps the right angle;
(3) the preparation sample all should use anchor clamps, to guarantee that sample correctly overlaps and accurately to locate.
3, test conditions
Unless otherwise prescribed, the storage period of sample and testing circumstance should meet the following requirements:
(1) shortest time to test after sample prepares is 16h, and maximum duration is 1 month:
(2) test should be carried out in temperature is 23 ± 2 ℃ environment.Arbitration test or should be that 234 ± 2 ℃, relative humidity are to carry out in 45%～55% the environment in temperature to the tackiness agent of temperature, humidity sensitive;
(3) to the test of temperature requirement is only arranged, sample should not be less than half an hour in the following storage period of test temperature before the test; To the test of temperature, humidity requirement is arranged, the storage period of sample under testing circumstance generally should not be less than 16h before the test.
4, test-results
(1) tensile shear strength calculates by formula (2):
In the formula
--tensile shear strength (MPa);
Maximum load (N) when P--destroys;
B--sample bonding plane width (mm);
L--sample bonding plane length (mm).
(2) test-results is represented with arithmetical av, maximum, the Schwellenwert of shearing resistance, gets four position effective digitals.
(2) test result
The tensile shear strength test-results sees Table 3.
Table 3 tensile shear strength test-results
3.3 ultimate compression strength
(1) testing method
1, sample
(1) glue Chinese catalpa shape, size are as shown in the figure
(2) upper and lower end face of glue post should be the plane, and vertical with the main shaft of glue post.
2, testing installation
Trier should make the sample failure load at 10%～90% of full range, and the measuring error of trier is not more than 1%.
3, test conditions
Trier pressure head translational speed is ± 0.2mm/min.
4, test-results
(1) ultimate compression strength is calculated by formula (3);
B=P／A
B one pressure resistance degree (MPa) in the formula;
Maximum load (N) when P one destroys;
A one glue post cross-sectional area (mm
2).
(2) test result
Table 4 compressive strength test result
3.4 hardness
(1) testing method:
1, sample
(1) glue-line answers thickness even, smooth surface, smooth, no bubble, has no mechanical damage and impurity etc.;
(2) bondline thickness should be not less than 3 millimeters;
(3) sample size should guarantee that each measurement point and sample Edge Distance are not less than 12 millimeters, and the distance between each measurement point is not less than 6 millimeters;
(4) every group of sample measurement counted and is no less than 5, can carry out at one or several sample.
2, testing installation
(1) this test equipment used is the xHS.D Shore durometer.
(2) hardness permission maximum deviation is ± 1 Shore durometer number.
3, test conditions
(1) during no particular requirement, sample should be placed in testing circumstance 1 hour at least before the test.
(2) pressing and reading immediately after sample contacts 15 seconds fully if regulation is wanted instantaneous reading, then contact reading in back 1 second at pressing and sample fully.
4, test-results
(1) reading that obtains on the reading scale is the Shore durometer number of measuring.
(2) every group of sample measurement counted and is no less than 5, can carry out at one or several sample, and test-results is with the arithmetical mean value representation of one group of sample.
(2) test result
Hardness test the results are shown in Table 5.
Table 5. the hardness test result
3.5 wear resistance
(1) testing method
1, sample
(1) specimen shape, size are as shown in Figure 4;
(2) matrix of samples is 45 steel, and coating and matrix bond are firm, the coatingsurface zero defect.
2, testing installation
(1) this test equipment used is SKODA-SAVIN friction wear testing machine;
(2) emery wheel is 40 Wimet, surface roughness Ra 0.03;
(3) emery wheel rotating speed: n=675r/rain.
3, test conditions
(1) before the test, specimen surface polishes;
(2) preload: p=5Kg;
(3) total revolution: N=3000r;
(4) emery wheel be coated with interlayer spray 50%K
2CrO
7The aqueous solution.
4, test-results
(1) measure the polishing scratch width B with eyepiece, tabling look-up draws corresponding wear volume, calculates its wear resistance;
(2) test-results is to be no less than the arithmetical mean value representation of three test blocks.
(2) test result
Wearing test the results are shown in Table 6
Table 6. wearing test result
3.6 high warm nature
(1) test method
1, sample
Cast out 20 * 24 sample with plastics tubing
2, corrosive fluid
Preparation 20%, 30% hydrochloric acid soln, 20%, 30%, 50%, 70% sulphuric acid soln, 20%, 30 %, 50%, 70% sodium hydroxide solution, 10%NaCl solution and measure toluene.
3, test conditions
(soil) test is at room temperature carried out;
(2) regularly observe, all around back record observations.
(2) test-results
High temperature test the results are shown in Table 7.
Table 7. high temperature test result
In 2 tables "/" be that no this item is tested
3.7 temperature tolerance
(1) testing method
1, sample
Tackiness agent evenly is coated in 45 steel matrix surfaces, bondline thickness 2mm.
2, test conditions
The sticking sample that coats is put into baking oven, progressively heat to the desired temperature of test, behind the insulation certain hour, observe the glue-line changing conditions.
(2) test result
The temperature tolerance test-results sees Table 8.
Table 8 heatproof test-results
Claims (3)
1. high-temperature reparation agent is mixed by A component and B component, and wherein the A component is Resins, epoxy E44, dibutylester, nickel powder, iron powder, aluminium sesquioxide, Stainless Steel Powder, titanium dioxide and white carbon black; The B component is 105 contracting amine hardeners, KH550 silane coupling agent, DMP-30(2,4,6-three (dimethylamino methyl) phenol), aluminium sesquioxide and white carbon black; The weight proportion of A component and B component is 4:1 ~ 6:1;
Wherein, the A component is Resins, epoxy E44 2256g, dibutylester 102g, nickel powder 612g, iron powder 612, aluminium sesquioxide 608g, Stainless Steel Powder 408g, titanium dioxide 610g and white carbon black 200g; The B component is 105 contracting amine hardener 65g, KH550 silane coupling agent 410g, DMP-30(2,4,6-three (dimethylamino methyl) phenol) 613g, aluminium sesquioxide 60g, white carbon black 1200g.
2. high-temperature reparation agent according to claim 1 is characterized in that, the weight proportion of A component and B component is preferably 5:1.
3. the preparation method of high-temperature reparation agent according to claim 1 comprises the steps:
1) uses area of computer aided coating formula optimization design, obtain the prescription of above-mentioned healant;
2) starting material are anticipated; Starting material are anticipated comprise: 1. to the in bulk and starting material that make moist 100 ℃ of oven dry down; 2. the starting material to thickness add heat gain flowability, but temperature can not surpass 60 ℃, in case rotten; 3. to coarse grained pulvis starting material, grind and sieve and get fine particle materials;
3) preparation of A, B component
Take by weighing A component starting material by prescription, Resins, epoxy E44 and dibutylester are placed duplicate rows star dynamic mixing still, be heated to 90 ℃, stir 30min, add nickel powder, iron powder, Stainless Steel Powder, aluminium sesquioxide, titanium dioxide and white carbon black, high-speed stirring 30min is cooled to 40 ℃ then to mixing, vacuumize and stirring at low speed 20min, it is standby to obtain the A component;
Take by weighing B component starting material by prescription, 105 contracting amine hardeners, KH550 silane coupling agent and DMP-30 are placed duplicate rows star dynamic mixing still, mix and stir 30min, add aluminium sesquioxide and white carbon black and continue to stir 30min to mixing, vacuumize then and stirring at low speed 20min, it is standby to obtain the B component;
4) preparation of healant
Above-mentioned A, B component are taken by weighing by weight ratio, mix, be coated on to be joined.
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|---|---|---|---|
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| CN104513357A (en) * | 2013-09-27 | 2015-04-15 | 宁波思易哲新材料科技有限公司 | Polyphenylene sulfide long fiber reinforced silicon carbide-epoxy resin composite material, preparation method and use method thereof |
| CN105505260A (en) * | 2015-04-02 | 2016-04-20 | 耿次会 | High-temperature-resistant three-in-one healant |
| CN104858398A (en) * | 2015-04-22 | 2015-08-26 | 浙江大盛纸业有限公司 | Repairing mould of drying cylinder shaft head and application method of repairing mould |
| CN105295661A (en) * | 2015-12-02 | 2016-02-03 | 苏州捷德瑞精密机械有限公司 | Part sand hole mending agent and preparation method thereof |
| CN105647454A (en) * | 2016-03-17 | 2016-06-08 | 中国人民解放军理工大学野战工程学院 | Gluing composition capable of rapidly stopping leakage of high-pressure fluid pipeline and preparation method of gluing composition |
| CN110903683B (en) * | 2018-09-17 | 2022-03-04 | 航天特种材料及工艺技术研究所 | Composite material surface repairing method |
| CN110153432A (en) * | 2019-05-14 | 2019-08-23 | 鞍钢股份有限公司 | Cast iron box body hole repairing process and repairing material thereof |
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| CN1104231A (en) * | 1994-08-25 | 1995-06-28 | 西安科友科技实业公司 | Metal-repairing binder capable of being machined |
| CN1260374A (en) * | 2000-01-20 | 2000-07-19 | 刘文慧 | Bi-component corrosion-proof gum |
| EP2137277B1 (en) * | 2007-04-11 | 2011-05-25 | Dow Global Technologies LLC | Heat-resistant structural epoxy resins |
| CN101157836B (en) * | 2007-11-08 | 2010-05-19 | 武汉市科达云石护理材料有限公司 | Red-green dry-pasting glue and preparation technique thereof |
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| CN101440268A (en) * | 2008-12-30 | 2009-05-27 | 黑龙江省科学院石油化学研究院 | Low temperature curing high temperature resistant inorganic / organic hybridization epoxy adhesive and preparation thereof |
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| CN102391816A (en) | 2012-03-28 |
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