CN107337825A - A kind of preparation method of yielding rubber - Google Patents
A kind of preparation method of yielding rubber Download PDFInfo
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- CN107337825A CN107337825A CN201710641922.4A CN201710641922A CN107337825A CN 107337825 A CN107337825 A CN 107337825A CN 201710641922 A CN201710641922 A CN 201710641922A CN 107337825 A CN107337825 A CN 107337825A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
- C08L15/005—Hydrogenated nitrile rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a kind of preparation method of yielding rubber, belong to technical field of polymer materials.The present invention first soaks glass fibre with dopamine solution, pretreated glass fiber is made, glass fibre is well mixed with ferric chloride solution again, and precipitating reagent urea liquid is added dropwise, after reaction terminates, it is aged, filtering, washing and dry modified glass-fiber, then hydrogenated nitrile-butadiene rubber is plasticated, sequentially add polymethyl methacrylate, Corvic, Petropols, modified glass-fiber, sulphur, accelerator, age resistor and plasticizer, it is kneaded, and apply external magnetic field in mixing process, elastomeric compound is obtained after stewing process, finally elastomeric compound is heated and vulcanized, produce yielding rubber.Gained yielding rubber of the invention has excellent stability and mechanical property concurrently, and its service life is grown compared with conventional base rubber, and mechanical property keeps good.
Description
Technical field
The invention discloses a kind of preparation method of yielding rubber, belong to technical field of polymer materials.
Background technology
Damping has important use in plant equipment, railroad track, ship, bridge, Aero-Space etc..Especially in recent years
Come, earthquake frequently occurs, directly or indirectly to society and damage naturally so that damping is particularly important.In damping
In material, rubber plays more and more important role, is the direction of vibration-absorptive material development.The characteristics of rubber is existing high-elastic
Property, there is high viscosity again, and also have its distinctive comprehensive mechanical property, i.e., low adjustable modulus and higher intrinsic resistance
Buddhist nun, make its effect in terms of buffering, damping and dynamic sealing unrivaled.The shock absorption principle of rubber utilizes rubber
High viscosity absorbs vibrational energy, and the mechanical energy of absorption or acoustic energy are partially converted into heat energy and dissipated, and subtracts so as to play
Less or reduce amplitude effect.
The factor for influenceing rubber damping damping performance at present has the morphosis of elastomeric material, blend rubber system each component
Compatibility, cross-linking system, temperature in use and vibration frequency, polymer blending ratio, reinforcing filler and other auxiliary agents etc..
Natural rubber（NR）It is the product of biosynthesis, main component is rubber hydrocarbon, also containing a small amount of protein, aliphatic acid etc..Its
Processing method is a variety of, and obtained various NR component content differs, and its mechanical property, damping performance etc. are also variant, about this
The research of aspect is very few.
Set as the heavy construction such as damper element, particularly senior constructure, bridge, internal combustion engine, train head or machinery
Standby foundation shock absorption element, relatively difficult due to installing and changing, costly, its product typically requires there is the longer use longevity
Life, to reduce maintenance and renewal cost.In the various factors for influenceing shock absorbing rubber product service life, thermo-oxidative ageing is most heavy
One of factor wanted.Because rubber is the non-conductor of heat in itself, the mechanical energy that damping is absorbed is after heat energy is converted into
It can not be dissipated in time, therefore rubber will heat up, and the rise of temperature is in addition to the hydraulic performance decline for making rubber, it is more main
What is wanted is that will greatly accelerate the thermo-oxidative ageing process of rubber, so as to shorten its service life.Therefore, if suppressing rubber
Thermo-oxidative ageing process, the heat aging property with regard to rubber can be improved, so as to extend the service life of product.
The content of the invention
The present invention solves the technical problem of：For conventional base elastomeric material in use, damping is inhaled
The mechanical energy of receipts can not be dissipated in time after heat energy is converted into, and accelerate the thermo-oxidative ageing of rubber, cause product service life
A kind of the problem of shorter, there is provided preparation method of yielding rubber.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
（1）It is 1 in mass ratio：50~1：80 mix glass fibre with dopamine solution 45~60min of immersion, then filtered,
Obtain pretreated glass fiber；
（2）It is 1 in mass ratio by pretreated glass fiber and ferric chloride solution：30~1：40 mixing add reactor, disperse equal
After even, then the urea liquid of 2~3 times of ferric chloride solution volume is added dropwise into reactor, waits to be added dropwise, continue 3~5h of reaction,
It is aged again, be filtered, washed and dried to obtain modified glass-fiber；
（3）Count in parts by weight, take 100~120 parts of hydrogenated nitrile-butadiene rubbers successively, 10~15 parts of polymethyl methacrylates, 8~
10 parts of Corvics, 8~10 parts of Petropols, 10~20 parts of modified glass-fibers, 3~5 parts of sulphur, 1~3 part of promotion
Agent, 2~4 parts of age resistor, 1~4 part of plasticizer, first hydrogenated nitrile-butadiene rubber is plasticated after 10~15min, sequentially adds poly- methyl
Methyl acrylate, Corvic, Petropols, modified glass-fiber, sulphur, accelerator, age resistor and plasticizer, it is kneaded
After 10~20min, and apply external magnetic field in mixing process, end to be mixed, stand 6~8h, obtain elastomeric compound；
（4）Batch mixing glue is heated into 45~60min of vulcanization, discharging, produces yielding rubber.
Step（1）The glass fibre is any one in alkali-free glass fibre or medium-alkali glass fibre.
Step（3）The Petropols are any one in C5 Petropols or C9 Petropols.
Step（3）The accelerator is any one in Vulcanization accelerator TMTD, captax or accelerator ZDMC.
Step（3）It is 1 in mass ratio by antioxidant 4020, anti-aging agent RD and antioxidant NBC that the age resistor, which is,：1：1 is mixed
Conjunction forms.
Step（3）The plasticizer is in dibutyl phthalate, octyl epoxy stearate or dioctyl adipate
Any one.
The beneficial effects of the invention are as follows：（1）Technical solution of the present invention is carried out first with dopamine solution to glass fibre
Immersion is modified, and improves the absorption property of glass fibre, then modified glass fibre is mixed with ferric chloride solution, using urea as
Precipitating reagent, hydroxide ion caused by hydrolysis of urea is combined with iron ion, generate iron hydroxide nucleus, nucleus is once formed,
Adsorbed by the dopamine of fiberglass surfacing, in subsequent processes, iron hydroxide dehydration, generate iron oxide, and aoxidize
Iron uniform adsorption improves the roughness of fiberglass surfacing in fiberglass surfacing, is advantageous to linear in subsequent processes
Rubber molecule, which is affiliated to, is wound in coarse fiberglass surfacing, in by vibrations deformation process, can effectively improve rubber molecular chain
The resistance of motion, steeply rise system internal friction, mechanical energy caused by vibrations be converted into heat energy and dissipated, at the same by
During power, glass fibre can share external force jointly with rubber molecular chain, disperse stress, play reinforcing effect, avoid system
Stress concentration and cause structure and elasticity drastically to change, effectively limit product large scale deformation under external force, make product
Mechanical property is further lifted, in addition, iron oxide is adsorbed after fiberglass surfacing, can be in process with externally-applied magnetic field side
To the enhancing network structure for making glass fibre form oriented alignment in rubber matrix, so as to effectively improve the thermal conductivity of system
Can, the heat energy fast dissipation of formation will be converted, avoid thermal energy buildup from causing rubber thermo-oxidative ageing inside system；（2）The present invention
Technical scheme can increase rubber by adding polymethyl methacrylate, Corvic and Petropols in rubbery system
The polarity of xanthan molecule, cohesive strength and surface energy are improved, in addition, the addition of Petropols, can effectively improve system to glass fibers
The wettability of dimension, so as to improve the adhesion between system and glass fibre, effectively improve product mechanical performance；
（3）Technical solution of the present invention, can be effective after nitrile rubber hydrogenation treatment using hydrogenated nitrile-butadiene rubber as base rubber material
The unstable double bond in rubber molecule is reduced, asking for deterioration by oxidation occurs under heating condition so as to effectively reduce rubber molecule
Topic.
Embodiment
It is 1 in mass ratio：50~1：Glass fibre and mass concentration are that 2g/L dopamine solutions mix and pour into beaker by 80
In, and beaker immigration digital display constant temperature is tested the speed magnetic stirring apparatus, it is 55~65 DEG C in temperature, rotating speed is 300~500r/min bars
Under part, constant temperature is stirred 45~60min, filtering, obtains filter cake, as pretreated glass fiber；Gained pretreated glass is fine
Dimension and mass fraction are that 8~10% ferric chloride solutions are 1 in mass ratio：30~1：40 add reactors in, in temperature be 45~55
DEG C, under the conditions of rotating speed is 400~600r/min, after constant temperature is dispersed with stirring 45~60min, then dropwise addition iron chloride is molten into reactor
The mass fraction that liquid accumulates 2~3 times is 10~15% urea liquids, and it is 8~10mL/min to control urea liquid drop rate, is treated
Urea liquid is added dropwise, and continues constant temperature 3~5h of stirring reaction, and question response terminates, and material in reactor is transferred into ageing tank, in
Still aging 8~12h under room temperature condition, filtering, obtains filter residue, and filter residue is washed with deionized 3~5 times, then by after washing
Filter residue is transferred in baking oven, is dried under the conditions of being 105~110 DEG C in temperature to constant weight, is obtained modified glass-fiber；In parts by weight
Meter, takes 100~120 parts of hydrogenated nitrile-butadiene rubbers successively, 10~15 parts of polymethyl methacrylates, 8~10 parts of Corvics,
8~10 parts of Petropols, 10~20 parts of modified glass-fibers, 3~5 parts of sulphur, 1~3 part of accelerator, 2~4 parts of age resistor, 1~
Hydrogenated nitrile-butadiene rubber, is first placed in mill by 4 parts of plasticizer, and under the conditions of temperature is 40~80 DEG C, plasticate 10~15min,
Sequentially add polymethyl methacrylate, Corvic, Petropols, modified glass-fiber, sulphur, accelerator, anti-
Old agent and plasticizer, 5~15min is kneaded under the conditions of being 130~160 DEG C in temperature, in mixing process, to material in mill
Apply the external magnetic field that intensity is 40~50T, end to be mixed, discharging, 6~8h is stood under room temperature condition, obtains elastomeric compound, and
Gained elastomeric compound is transferred in vulcanizing press, is 180~200 DEG C in temperature, under the conditions of pressure is 20~30MPa, vulcanizes 45
~60min, discharging, is cooled to room temperature, produces yielding rubber.The glass fibre is alkali-free glass fibre or middle alkali glass fiber
Any one in dimension.The Petropols are any one in C5 Petropols or C9 Petropols.The accelerator is
Any one in Vulcanization accelerator TMTD, captax or accelerator ZDMC.The age resistor is by antioxidant 4020, anti-aging agent RD
It is 1 in mass ratio with antioxidant NBC：1：1 mixes.The plasticizer is dibutyl phthalate, epoxystearic acid is pungent
Any one in ester or dioctyl adipate.
Example 1
It is 1 in mass ratio：Alkali-free glass fibre and mass concentration are that 2g/L dopamine solutions mixs and poured into beaker by 60, and general
Beaker moves into digital display constant temperature and tested the speed magnetic stirring apparatus, is 60 DEG C in temperature, under the conditions of rotating speed is 400r/min, constant temperature is stirred
60min, filtering, obtains filter cake, as pretreated glass fiber；It is 10% chlorination by gained pretreated glass fiber and mass fraction
Ferrous solution is 1 in mass ratio：40 add in reactor, are 50 DEG C in temperature, under the conditions of rotating speed is 400r/min, constant temperature stirring divides
After dissipating 60min, then the mass fraction of 2 times of dropwise addition ferric chloride solution volume is 10% urea liquid into reactor, and control urea is molten
Drop rate of acceleration is 10mL/min, treats that urea liquid is added dropwise, and continues constant temperature stirring reaction 3h, and question response terminates, will reacted
Material is transferred to ageing tank in kettle, the still aging 8h under room temperature condition, filtering, obtains filter residue, and filter residue 3 is washed with deionized
It is secondary, then the filter residue after washing is transferred in baking oven, dried under the conditions of being 100 DEG C in temperature to constant weight, obtain modified glass-fiber；Press
Parts by weight meter, takes 100 parts of hydrogenated nitrile-butadiene rubbers successively, 10 parts of polymethyl methacrylates, 10 parts of Corvics, 10 parts
C5 Petropols, 10 parts of modified glass-fibers, 3 parts of sulphur, 3 parts of captaxs, 3 parts of age resistor, 2 parts of plasticizer, it will first hydrogenate fourth
Nitrile rubber is placed in mill, and under the conditions of temperature is 40 DEG C, plasticate 10min, is sequentially added polymethyl methacrylate, is gathered
Vinyl chloride resin, C5 Petropols, modified glass-fiber, sulphur, captax, age resistor and plasticizer, in temperature be 150 DEG C
Under the conditions of be kneaded 10min, in mixing process, in mill material apply intensity be 50T external magnetic field, end to be mixed,
Discharging, stands 8h under room temperature condition, obtains elastomeric compound, and gained elastomeric compound is transferred in vulcanizing press, in temperature be 200
DEG C, under the conditions of pressure is 30MPa, vulcanizes 60min, discharging, be cooled to room temperature, produce yielding rubber.The age resistor be by
Antioxidant 4020, anti-aging agent RD and antioxidant NBC are 1 in mass ratio：1：1 mixes.The plasticizer is phthalic acid
Dibutyl ester.
Example 2
Count in parts by weight, take 100 parts of hydrogenated nitrile-butadiene rubbers, 10 parts of polymethyl methacrylates, 10 parts of polyvinyl chloride trees successively
Fat, 10 parts of C5 Petropols, 10 parts of glass fibres, 3 parts of sulphur, 3 parts of captaxs, 3 parts of age resistor, 2 parts of plasticizer, first by hydrogen
Change nitrile rubber to be placed in mill, under the conditions of temperature is 40 DEG C, plasticate 10min, sequentially adds poly-methyl methacrylate
Ester, Corvic, C5 Petropols, glass fibre, sulphur, captax, age resistor and plasticizer, in temperature be 150 DEG C
Under the conditions of be kneaded 10min, in mixing process, in mill material apply intensity be 50T external magnetic field, end to be mixed,
Discharging, stands 8h under room temperature condition, obtains elastomeric compound, and gained elastomeric compound is transferred in vulcanizing press, in temperature be 200
DEG C, under the conditions of pressure is 30MPa, vulcanizes 60min, discharging, be cooled to room temperature, produce yielding rubber.The age resistor be by
Antioxidant 4020, anti-aging agent RD and antioxidant NBC are 1 in mass ratio：1：1 mixes.The plasticizer is phthalic acid
Dibutyl ester.
Example 3
It is 1 in mass ratio：Glass fibre and mass concentration are that 2g/L dopamine solutions are mixed and poured into beaker by 60, and by beaker
Move into digital display constant temperature to test the speed magnetic stirring apparatus, be 60 DEG C in temperature, under the conditions of rotating speed is 400r/min, constant temperature is stirred
60min, filtering, obtains filter cake, as pretreated glass fiber；It is 10% chlorination by gained pretreated glass fiber and mass fraction
Ferrous solution is 1 in mass ratio：40 add in reactor, are 50 DEG C in temperature, under the conditions of rotating speed is 400r/min, constant temperature stirring divides
After dissipating 60min, then the mass fraction of 2 times of dropwise addition ferric chloride solution volume is 10% urea liquid into reactor, and control urea is molten
Drop rate of acceleration is 10mL/min, treats that urea liquid is added dropwise, and continues constant temperature stirring reaction 3h, and question response terminates, will reacted
Material is transferred to ageing tank in kettle, the still aging 8h under room temperature condition, filtering, obtains filter residue, and filter residue 3 is washed with deionized
It is secondary, then the filter residue after washing is transferred in baking oven, dried under the conditions of being 100 DEG C in temperature to constant weight, obtain modified glass-fiber；Press
Parts by weight meter, 100 parts of hydrogenated nitrile-butadiene rubbers is taken successively, 10 parts of modified glass-fibers, 3 parts of sulphur, 3 parts of captaxs, 3 parts anti-
Hydrogenated nitrile-butadiene rubber, is first placed in mill by old agent, 2 parts of plasticizer, and under the conditions of temperature is 40 DEG C, plasticate 10min, then according to
Secondary addition modified glass-fiber, sulphur, captax, age resistor and plasticizer, 10min is kneaded under the conditions of being 150 DEG C in temperature,
In mixing process, apply the external magnetic field that intensity is 50T, end to be mixed, discharging, then at room temperature condition to material in mill
Lower standing 8h, elastomeric compound is obtained, and gained elastomeric compound is transferred in vulcanizing press, be 200 DEG C in temperature, pressure is 30MPa bars
Under part, vulcanize 60min, discharging, be cooled to room temperature, produce yielding rubber.The age resistor is by antioxidant 4020, age resistor
RD and antioxidant NBC are 1 in mass ratio：1：1 mixes.The plasticizer is dibutyl phthalate.
Example 4
It is 1 in mass ratio：Glass fibre and mass concentration are that 2g/L dopamine solutions are mixed and poured into beaker by 60, and by beaker
Move into digital display constant temperature to test the speed magnetic stirring apparatus, be 60 DEG C in temperature, under the conditions of rotating speed is 400r/min, constant temperature is stirred
60min, filtering, obtains filter cake, as pretreated glass fiber；It is 10% chlorination by gained pretreated glass fiber and mass fraction
Ferrous solution is 1 in mass ratio：40 add in reactor, are 50 DEG C in temperature, under the conditions of rotating speed is 400r/min, constant temperature stirring divides
After dissipating 60min, then the mass fraction of 2 times of dropwise addition ferric chloride solution volume is 10% urea liquid into reactor, and control urea is molten
Drop rate of acceleration is 10mL/min, treats that urea liquid is added dropwise, and continues constant temperature stirring reaction 3h, and question response terminates, will reacted
Material is transferred to ageing tank in kettle, the still aging 8h under room temperature condition, filtering, obtains filter residue, and filter residue 3 is washed with deionized
It is secondary, then the filter residue after washing is transferred in baking oven, dried under the conditions of being 100 DEG C in temperature to constant weight, obtain modified glass-fiber；Press
Parts by weight meter, 100 parts of nitrile rubbers, 10 parts of polymethyl methacrylates, 10 parts of Corvics, 10 parts of C5 stones are taken successively
Oleoresin, 10 parts of modified glass-fibers, 3 parts of sulphur, 3 parts of captaxs, 3 parts of age resistor, 2 parts of plasticizer, first nitrile rubber is put
In mill, under the conditions of temperature is 40 DEG C, plasticate 10min, sequentially adds polymethyl methacrylate, polyvinyl chloride tree
Fat, C5 Petropols, modified glass-fiber, sulphur, captax, age resistor and plasticizer, mixed under the conditions of being 150 DEG C in temperature
10min is refined, in mixing process, applies the external magnetic field that intensity is 50T to material in mill, end to be mixed, discharges, then at
8h is stood under room temperature condition, obtains elastomeric compound, and gained elastomeric compound is transferred in vulcanizing press, is 200 DEG C in temperature, pressure is
Under the conditions of 30MPa, vulcanize 60min, discharging, be cooled to room temperature, produce yielding rubber.The age resistor is by age resistor
4020th, anti-aging agent RD and antioxidant NBC are 1 in mass ratio：1：1 mixes.The plasticizer is dibutyl phthalate.
Comparative example：The damping rubber block of Hebei product of rubber and plastic Co., Ltd production
The gained of example 1 to 4 yielding rubber and comparative example product are subjected to performance detection, specific detection method is as follows：
1. Mechanics Performance Testing：Using XL-250A type tensile testing machines（The factory of Shanghai chemical machinery four）, held by GB/T528-2009
OK；
2. senile experiment：Using DHX-9143 type electric heating constant temperature air blast ageing ovens（Shanghai Fuma Experiment Equipment Co., Ltd.）, it is real
Test condition：Aging temperature：100 DEG C, the time：48 hours.
The specific testing result of performance is as shown in table 1 before thermo-oxidative ageing：
Table 1
The specific testing result of performance is as shown in table 2 after thermo-oxidative ageing：
Table 2
From Tables 1 and 2 testing result, yielding rubber obtained by technical solution of the present invention has excellent stability and mechanical property concurrently
Can, its service life is grown compared with conventional base rubber, and mechanical property keeps good.
Claims (6)
1. a kind of preparation method of yielding rubber, it is characterised in that specifically preparation process is：
（1）It is 1 in mass ratio：50~1：80 mix glass fibre with dopamine solution 45~60min of immersion, then filtered,
Obtain pretreated glass fiber；
（2）It is 1 in mass ratio by pretreated glass fiber and ferric chloride solution：30~1：40 mixing add reactor, disperse equal
After even, then the urea liquid of 2~3 times of ferric chloride solution volume is added dropwise into reactor, waits to be added dropwise, continue 3~5h of reaction,
It is aged again, be filtered, washed and dried to obtain modified glass-fiber；
（3）Count in parts by weight, take 100~120 parts of hydrogenated nitrile-butadiene rubbers successively, 10~15 parts of polymethyl methacrylates, 8~
10 parts of Corvics, 8~10 parts of Petropols, 10~20 parts of modified glass-fibers, 3~5 parts of sulphur, 1~3 part of promotion
Agent, 2~4 parts of age resistor, 1~4 part of plasticizer, first hydrogenated nitrile-butadiene rubber is plasticated after 10~15min, sequentially adds poly- methyl
Methyl acrylate, Corvic, Petropols, modified glass-fiber, sulphur, accelerator, age resistor and plasticizer, it is kneaded
After 10~20min, and apply external magnetic field in mixing process, end to be mixed, stand 6~8h, obtain elastomeric compound；
（4）Batch mixing glue is heated into 45~60min of vulcanization, discharging, produces yielding rubber.
A kind of 2. preparation method of yielding rubber according to claim 1, it is characterised in that：Step（1）The glass fibers
Tie up as any one in alkali-free glass fibre or medium-alkali glass fibre.
A kind of 3. preparation method of yielding rubber according to claim 1, it is characterised in that：Step（3）The oil tree
Fat is any one in C5 Petropols or C9 Petropols.
A kind of 4. preparation method of yielding rubber according to claim 1, it is characterised in that：Step（3）The accelerator
For any one in Vulcanization accelerator TMTD, captax or accelerator ZDMC.
A kind of 5. preparation method of yielding rubber according to claim 1, it is characterised in that：Step（3）The age resistor
It is 1 in mass ratio by antioxidant 4020, anti-aging agent RD and antioxidant NBC to be：1：1 mixes.
A kind of 6. preparation method of yielding rubber according to claim 1, it is characterised in that：Step（3）The plasticizer
For any one in dibutyl phthalate, octyl epoxy stearate or dioctyl adipate.
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| CN108484060A (en) * | 2018-07-06 | 2018-09-04 | 佛山市高明区爪和新材料科技有限公司 | A kind of freeze proof rubber concrete |
| CN108949045A (en) * | 2018-07-28 | 2018-12-07 | 钱万琦 | A kind of based Wood Adhesives |
| CN109294219A (en) * | 2018-09-20 | 2019-02-01 | 黄勇 | A kind of impact resistance composite nylon material |
| CN109535462A (en) * | 2018-12-20 | 2019-03-29 | 安徽蓝德自动化科技有限公司 | A kind of preparation method of instrument and meter for automation yielding rubber |
| CN111120621A (en) * | 2020-01-10 | 2020-05-08 | 浙江来福谐波传动股份有限公司 | Harmonic reducer capable of reducing vibration and manufacturing method thereof |
| CN111663562A (en) * | 2020-05-22 | 2020-09-15 | 浙江金誉工程咨询有限公司 | Construction method of shock absorption foundation for industrial equipment replacement |
| CN115260620A (en) * | 2022-08-15 | 2022-11-01 | 成都鸿图超越工程技术有限公司 | Hydrogenated nitrile rubber gas sealing element with good weather resistance |
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| CN108484060A (en) * | 2018-07-06 | 2018-09-04 | 佛山市高明区爪和新材料科技有限公司 | A kind of freeze proof rubber concrete |
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| CN111663562A (en) * | 2020-05-22 | 2020-09-15 | 浙江金誉工程咨询有限公司 | Construction method of shock absorption foundation for industrial equipment replacement |
| CN111663562B (en) * | 2020-05-22 | 2021-08-20 | 浙江金誉工程咨询有限公司 | Construction method of shock absorption foundation for industrial equipment replacement |
| CN115260620A (en) * | 2022-08-15 | 2022-11-01 | 成都鸿图超越工程技术有限公司 | Hydrogenated nitrile rubber gas sealing element with good weather resistance |
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| CN107337825B (en) | 2019-01-01 |
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Effective date of registration: 20181114 Address after: 518109 Building B, Shiguan Industrial Zone, Lianlun Road, Dalang Street, Longhua District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Siking Silicone Rubber Product Co., Ltd. Address before: 213102 No. 32 Labor West Road, Tianning District, Changzhou City, Jiangsu Province Applicant before: Changzhou Jie Xuan Textile Technology Co., Ltd. |
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