CN106167565A - A kind of novel damping material and preparation method thereof - Google Patents
A kind of novel damping material and preparation method thereof Download PDFInfo
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- CN106167565A CN106167565A CN201610598669.4A CN201610598669A CN106167565A CN 106167565 A CN106167565 A CN 106167565A CN 201610598669 A CN201610598669 A CN 201610598669A CN 106167565 A CN106167565 A CN 106167565A
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/02—Flame or fire retardant/resistant
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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
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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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of novel damping material and preparation method thereof, including the raw material of following parts by weight: nitrile rubber 100 parts, neoprene 20 40 parts, rosin resin 5 10 parts, calcium carbonate crystal whisker 5 10 parts, white carbon black 5 10 parts, crystalline flake graphite 47 parts, asbestos fibre 5 10 parts, titanium dioxide 24 parts, magnesium oxide 47 parts, zinc oxide 24 parts, aluminium hydroxide 23 parts, aluminum-zirconium coupling agent 13 parts, 35 parts of ricinoleate ester sodium sulfate, maleic anhydride acrylic copolymer 24 parts, cross-linking agent 0.5 1.5 parts and accelerator 12 parts.Inventive formulation is reasonable, and each component compatibility is good, and the vibration-absorptive material of preparation has the advantages such as damped coefficient is big, resilience force is high, damping, high temperature resistant, ageing-resistant, creep resistant, fire resistance are good, it is adaptable to high ferro guide rail shock-absorption backing plate, market prospect is the most wide.
Description
Technical field
The present invention relates to vibration-absorptive material technical field, specifically a kind of novel damping material and preparation method thereof.
Background technology
Along with developing rapidly of modern industry, vibrations and noise have become as the serious problems of every field, and it will drop
Low performance accuracy, affect product quality, shorten life of product, make high-precision instrument cisco unity malfunction, jeopardize safety, make to set
Standby or construction early damage, pollute environment and affect health of human body etc..Therefore, how research absorbs, cuts down vibrations and noise
Become current research direction.Current most widely used shock-dampening method general, maximally effective is to use various anti-vibration articles, especially
Rubber damping product, it can be effectively isolated vibrations and excitaton source, it is also possible to relaxes the vibrations of vibration body, is therefore widely used
The fields such as motor vehicles, railway, household, bridge, athletic protective equipment.
Along with the fast development of China Express Railway, high ferro operation mileage is continuously increased.High ferro has that speed is fast, freight volume
Greatly, the energy-conservation advantage such as comfortable, be the optimum selection solving urban transport problems.But high ferro is brought all multi-environment along the line and is asked
The problems such as topic, especially vibration, noise, have a strong impact on passenger and the orthobiosis of track people along the line.On the other hand, noise and
Vibration is also possible to cause the fatigue of train in-house facility and surrounding building, reduction of service life.Therefore, high ferro guide rail is pacified
Dress shock-absorption backing plate is extremely necessary.But existing shock-absorption backing plate exists, and rubber viscous is big, oil resistivity is poor, technological operation is tired
Difficulty, the problems such as product damping performance, ageing-resistant performance, impact resistance and anti-fatigue performance are poor, cost is higher.
Summary of the invention
The present invention is directed to the problem that existing vibration-absorptive material exists, it is provided that one is ageing-resistant, mechanical property strong, anti-fatigue performance
The simple and environmentally-friendly novel damping material nontoxic, resistant to elevated temperatures of good, wear-resisting, with low cost, preparation technology.
In order to realize object above, the technical solution used in the present invention is as follows:
A kind of novel damping material, including the raw material of following parts by weight:
Nitrile rubber 100 parts, neoprene 20-40 part, rosin resin 5-10 part, calcium carbonate crystal whisker 5-10 part, white carbon black 5-10 part,
Crystalline flake graphite 4-7 part, asbestos fibre 5-10 part, titanium dioxide 2-4 part, magnesium oxide 4-7 part, zinc oxide 2-4 part, aluminium hydroxide 2-
3 parts, aluminum-zirconium coupling agent 1-3 part, ricinoleate ester sodium sulfate 3-5 part, copolymer of maleic anhydride and acrylic acid 2-4 part, cross-linking agent
0.5-1.5 part and accelerator 1-2 part.
Preferably, the above aluminum-zirconium coupling agent be aluminium methacrylate-zirconium coupling agent, adipic acid aluminum-zirconium coupling agent and
One in aluminium stearate-zirconium coupling agent.
Preferably, the above cross-linking agent is Aronix M 240.
Preferably, the above accelerator is dibenzothiazyl disulfide zinc or PZ.
Preferably, the above vibration-absorptive material also includes antioxidant 2-3 part, and described antioxidant is antioxidant
1010, the one in antioxidant 1076 and antioxidant CA.
Preferably, the above vibration-absorptive material also includes alkyl phenol polyethylene glycol oxide ether 1-3 part；Alkyl phenol polyethylene glycol oxide
Ether includes NPE, OPEO and alkylpolyoxyethylene.
Preferably, the above vibration-absorptive material also includes fire retardant 2-3 part, and described fire retardant is APP, Firebrake ZB
In one.
The preparation method of a kind of novel damping material, comprises the following steps:
(1) stir mixing: weigh each raw material according to above-mentioned formula, adds high force dispersion blender by each raw material, in temperature is
130-150 DEG C, vacuum be 0.08-0.10Mpa, rotating speed be under 300-500rpm stirring 20-30min, obtain mix raw material；
(2) hot-forming: above-mentioned mixing raw material is added in mold cavity, temperature be 150-170 DEG C, pressure be under 12-18MPa
Hot-forming 3-5min, obtains semifinished product；
(3) microwave combustion method: the semifinished product that step (2) obtains is put into microwave heating equipment and enters at temperature is 140-180 DEG C
Row solidification heat treatment, is cooled to room temperature, obtains novel damping material.
Preferably, the above solidification heat treatment is to be incubated 1h, 1.5h and 2h respectively at 140 DEG C, 160 DEG C and 180 DEG C.
Preferably, the heating rate of the above step (3) is 3-5 DEG C/min.
Compared with prior art, the invention have the benefit that
1, the formula of the present invention is nitrile rubber high with oil resistivity, that air-tightness is good, heat-resisting, ageing-resistant and coordinates ageing-resistant, resistance to
Heat, oil resistant, resistance to chemical attack, good mechanical performance natural rubber as primary raw material, add calcium carbonate crystal whisker, white carbon black,
The adjuvant such as crystalline flake graphite, asbestos fibre, this formula is reasonable, and each component compatibility is good, and the vibration-absorptive material of preparation has damped coefficient
The advantages such as greatly, resilience force height, damping, high temperature resistant, ageing-resistant, creep resistant, fire resistance are good, it is adaptable to high ferro guide rail cushion
Plate, market prospect is the most wide.
2, the formula of the present invention is using crystalline flake graphite as packing material, it is possible to the abrasion and the reduction that reduce vibration-absorptive material are made an uproar
Sound, can improve the damped coefficient of material simultaneously.
3, inventive formulation addition asbestos fibre is as packing material, is possible not only to improve the mechanical property of vibration-absorptive material,
The performances such as heat-resisting, the insulation of vibration-absorptive material, sound insulation can also be improved.
4, the formula of the present invention adds aluminum-zirconium coupling agent, is possible not only to the dispersibility of improvement system and reduces system viscosity,
Improve the adhesion of filler and rubber, improve the mechanical property of vibration-absorptive material, the most also there is the ageing-resistant performance of excellence.
5, the formula of the present invention is additionally added copolymer of maleic anhydride and acrylic acid so that each component compatibility is more preferable, can guarantee that
Vibration-absorptive material has good processing characteristics and mechanical property, can also improve the creep resistance of material simultaneously.
6, the formula of the present invention adds alkyl phenol polyethylene glycol oxide ether, can not only improve the processing characteristics of vibration-absorptive material, also
The ageing-resistant performance of material can be improved.
7, the preparation method of the present invention uses high force dispersion blender to carry out batch mixing, not only low cost, production efficiency height, consumption
Can be low, moreover it is possible to making the mixing of each component more uniform, rubber is more tight with the interface cohesion of other components, and then improves damping
The mechanical property of material.
8, the vibration-absorptive material that the present invention prepares has excellent performance, and wherein the hardness of vibration-absorptive material is 60-70IRHD, draws
Stretch intensity be 30-40MPa, break-draw rate be 300-400%, damped coefficient be 1.1-1.3, rebound degree be 8-10% and hot-air
Aging be 100 DEG C, 72h Tensile strength be 20-25MPa.
9, this preparation method use microwave combustion method have energy-conservation, production efficiency is high, homogeneous heating, easily realize automatization control
The advantages such as system, and be incubated in different temperature ranges, reduce the crackle that vibration-absorptive material produces because of thermal expansion.
10, the present invention also has that raw material sources are extensive, with low cost, preparation technology simple, production efficiency advantages of higher, holds
Easily realize industrialized production.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described, but is not limited to protection scope of the present invention.
Embodiment 1
A kind of novel damping material, by the raw material of following parts by weight: nitrile rubber 100 parts, neoprene 30 parts, rosin resin
7 parts, calcium carbonate crystal whisker 5 parts, white carbon black 8 parts, crystalline flake graphite 6 parts, asbestos fibre 5 parts, titanium dioxide 3 parts, magnesium oxide 6 parts, oxidation
2 parts of zinc, aluminium hydroxide 2 parts, aluminium methacrylate-zirconium coupling agent 1 part, 3 parts of ricinoleate ester sodium sulfate, maleic anhydride-propylene
Acid copolymer 2-4 part, Aronix M 240 cross-linking agent 0.5 part and dibenzothiazyl disulfide zinc accelerator 1 part.
Its preparation method, comprises the following steps:
(1) stir mixing: weigh each raw material according to above-mentioned formula, adds high force dispersion blender by each raw material, is 130 in temperature
DEG C, vacuum be 0.10Mpa, rotating speed be under 300rpm stirring 30min, obtain mix raw material；
(2) hot-forming: above-mentioned mixing raw material is added in mold cavity, temperature be 160 DEG C, pressure be to be hot pressed under 12MPa
Type 5min, obtains semifinished product；
(3) microwave combustion method: the semifinished product that step (2) obtains is put into microwave heating equipment, respectively 140 DEG C, 160 DEG C and
It is incubated 1h, 1.5h and 2h at 180 DEG C to carry out solidifying heat treatment, is cooled to room temperature, obtains novel damping material.
Embodiment 2
A kind of novel damping material, by the raw material of following parts by weight: nitrile rubber 100 parts, neoprene 20 parts, rosin resin
10 parts, calcium carbonate crystal whisker 8 parts, white carbon black 5 parts, crystalline flake graphite 5 parts, asbestos fibre 8 parts, titanium dioxide 2 parts, magnesium oxide 5 parts, oxidation
3 parts of zinc, aluminium hydroxide 3 parts, adipic acid aluminum-zirconium coupling agent 2 parts, 4 parts of ricinoleate ester sodium sulfate, maleic acid anhydride-propenoic acid are common
Polymers 3 parts, Aronix M 240 cross-linking agent 1 part, 1010 antioxidant 2 parts, OPEO 2 parts and curing
Bisbenzothiazole zinc accelerator 1.5 parts.
Its preparation method, comprises the following steps:
(1) stir mixing: weigh each raw material according to the formula of claim 1, adds high force dispersion blender by each raw material, in temperature
Degree is 150 DEG C, vacuum is 0.08Mpa, rotating speed is stirring 20min under 500rpm, obtains mixing raw material；
(2) hot-forming: above-mentioned mixing raw material is added in mold cavity, temperature be 150 DEG C, pressure be to be hot pressed under 18MPa
Type 3min, obtains semifinished product；
(3) microwave combustion method: the semifinished product that step (2) obtains is put into microwave heating equipment, respectively 140 DEG C, 160 DEG C and
It is incubated 1h, 1.5h and 2h at 180 DEG C to carry out solidifying heat treatment, is cooled to room temperature, obtains novel damping material.
Embodiment 3
A kind of novel damping material, by the raw material of following parts by weight: nitrile rubber 100 parts, neoprene 25 parts, rosin resin
8 parts, calcium carbonate crystal whisker 7 parts, white carbon black 10 parts, crystalline flake graphite 7 parts, asbestos fibre 9 parts, titanium dioxide 4 parts, magnesium oxide 5 parts, oxidation
2 parts of zinc, aluminium hydroxide 3 parts, aluminium stearate-zirconium coupling agent 3 parts, 5 parts of ricinoleate ester sodium sulfate, maleic acid anhydride-propenoic acid are common
Polymers 4 parts, Aronix M 240 cross-linking agent 1.5 parts, 1076 antioxidant 2 parts, OPEO 3 parts, poly-phosphorus
Acid ammonium fire retardant 2 parts and PZ accelerator 2 parts.
Its preparation method, comprises the following steps:
(1) stir mixing: weigh each raw material according to the formula of claim 1, adds high force dispersion blender by each raw material, in temperature
Degree is 140 DEG C, vacuum is 0.09Mpa, rotating speed is stirring 30min under 500rpm, obtains mixing raw material；
(2) hot-forming: above-mentioned mixing raw material is added in mold cavity, temperature be 170 DEG C, pressure be to be hot pressed under 15MPa
Type 5min, obtains semifinished product；
(3) microwave combustion method: the semifinished product that step (2) obtains is put into microwave heating equipment, respectively 140 DEG C, 160 DEG C and
It is incubated 1h, 1.5h and 2h at 180 DEG C to carry out solidifying heat treatment, is cooled to room temperature, obtains novel damping material.
Embodiment 4
A kind of novel damping material, by the raw material of following parts by weight: nitrile rubber 100 parts, neoprene 40 parts, rosin resin
5 parts, calcium carbonate crystal whisker 10 parts, white carbon black 8 parts, crystalline flake graphite 4 parts, asbestos fibre 10 parts, titanium dioxide 2 parts, magnesium oxide 7 parts, oxygen
Change 3 parts of zinc, aluminium hydroxide 2 parts, aluminium stearate-zirconium coupling agent 3 parts, 5 parts of ricinoleate ester sodium sulfate, maleic acid anhydride-propenoic acid
Copolymer 3 parts, Aronix M 240 cross-linking agent 1 part, 1010 antioxidant 2 parts, NPE 3 parts and diformazan
Base zinc dithiocarbamate accelerator 2 parts.
Its preparation method, comprises the following steps:
(1) stir mixing: weigh each raw material according to the formula of claim 1, adds high force dispersion blender by each raw material, in temperature
Degree is 140 DEG C, vacuum is 0.08Mpa, rotating speed is stirring 25min under 500rpm, obtains mixing raw material；
(2) hot-forming: above-mentioned mixing raw material is added in mold cavity, temperature be 160 DEG C, pressure be to be hot pressed under 15MPa
Type 3min, obtains semifinished product；
(3) microwave combustion method: the semifinished product that step (2) obtains is put into microwave heating equipment, respectively 140 DEG C, 160 DEG C and
It is incubated 1h, 1.5h and 2h at 180 DEG C to carry out solidifying heat treatment, is cooled to room temperature, obtains novel damping material.
Rubber damping material obtained by above-described embodiment 1-4 is according to industry standard test performance, and test is such as following table institute
Show:
| Sample | Hardness (IRHD) | Hot strength (MPa) | Elongation at break (%) | Damped coefficient | Rebound degree (%) | 100 DEG C, 72h Tensile strength (MPa) |
| Embodiment 1 | 61 | 32.7 | 309 | 1.19 | 8.7 | 22.7 |
| Embodiment 2 | 63 | 35.2 | 331 | 1.14 | 9.2 | 21.6 |
| Embodiment 3 | 69 | 39.1 | 396 | 1.28 | 9.8 | 23.4 |
| Embodiment 4 | 67 | 37.6 | 376 | 1.21 | 9.6 | 24.8 |
Drawing from the above, vibration-absorptive material prepared by the present invention has mechanics and damping performance, the wide market of excellence.
Above content is it cannot be assumed that the present invention is embodied as being confined to these explanations, for the technical field of the invention
Those of ordinary skill for, without departing under present inventive concept premise, it is also possible to make some simple deduction or replace, all answer
When being considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted to.
Claims (10)
1. a novel damping material, it is characterised in that: include the raw material of following parts by weight:
Nitrile rubber 100 parts, neoprene 20-40 part, rosin resin 5-10 part, calcium carbonate crystal whisker 5-10 part, white carbon black 5-10 part,
Crystalline flake graphite 4-7 part, asbestos fibre 5-10 part, titanium dioxide 2-4 part, magnesium oxide 4-7 part, zinc oxide 2-4 part, aluminium hydroxide 2-
3 parts, aluminum-zirconium coupling agent 1-3 part, ricinoleate ester sodium sulfate 3-5 part, copolymer of maleic anhydride and acrylic acid 2-4 part, cross-linking agent
0.5-1.5 part and accelerator 1-2 part.
Novel damping material the most according to claim 1, it is characterised in that: described aluminum-zirconium coupling agent be aluminium methacrylate-
One in zirconium coupling agent, adipic acid aluminum-zirconium coupling agent and aluminium stearate-zirconium coupling agent.
Novel damping material the most according to claim 1, it is characterised in that: described cross-linking agent is Aronix M 240.
Novel damping material the most according to claim 1, it is characterised in that: described accelerator is dibenzothiazyl disulfide zinc
Or PZ.
Novel damping material the most according to claim 1, it is characterised in that: described vibration-absorptive material also includes antioxidant 2-3
Part, described antioxidant is the one in antioxidant 1010, antioxidant 1076 and antioxidant CA.
Novel damping material the most according to claim 1, it is characterised in that: described vibration-absorptive material also includes alkyl phenol polyoxygenated
Vinyl Ether 1-3 part；Alkyl phenol polyethylene glycol oxide ether includes NPE, OPEO and dodecyl
Polyoxyethylene ether.
Novel damping material the most according to claim 1, it is characterised in that: described vibration-absorptive material also includes fire retardant 2-3 part,
Described fire retardant is the one in APP, Firebrake ZB.
The preparation method of a kind of novel damping material the most as claimed in claim 1, it is characterised in that: comprise the following steps:
Stir mixing: weigh each raw material according to the formula of claim 1, adds high force dispersion blender by each raw material, in temperature
For 130-150 DEG C, vacuum be 0.08-0.10Mpa, rotating speed be stirring 20-30min under 300-500rpm, obtain mixing former
Material；
Hot-forming: above-mentioned mixing raw material is added in mold cavity, temperature be 150-170 DEG C, pressure be heat under 12-18MPa
Molded 3-5min, obtains semifinished product；
Microwave combustion method: the semifinished product that step (2) obtains is put into microwave heating equipment and carries out solid at temperature is 140-180 DEG C
Heat-transformation processes, and is cooled to room temperature, obtains novel damping material.
The preparation method of novel damping material the most according to claim 8, it is characterised in that: described solidification heat treatment is respectively
1h, 1.5h and 2h it is incubated at 140 DEG C, 160 DEG C and 180 DEG C.
The preparation method of novel damping material the most according to claim 8 or claim 9, it is characterised in that: the liter of described step (3)
Temperature speed is 3-5 DEG C/min.
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| CN201610598669.4A CN106167565A (en) | 2016-07-27 | 2016-07-27 | A kind of novel damping material and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106633242A (en) * | 2016-12-19 | 2017-05-10 | 嘉兴安基新材料科技有限公司 | High-modulus damping material and preparation method thereof |
| CN106967239A (en) * | 2017-03-21 | 2017-07-21 | 宁国思达塑胶制品有限公司 | A kind of anti-aging yielding rubber |
| CN107011558A (en) * | 2017-05-25 | 2017-08-04 | 马成耀 | A kind of power generator yielding rubber and preparation method thereof |
| CN109181035A (en) * | 2018-09-03 | 2019-01-11 | 桐城运城制版有限公司 | A kind of gravure roller |
| CN109724040A (en) * | 2017-05-11 | 2019-05-07 | 衢州市联橙环保科技有限公司 | A kind of bottom music dazzling light lamp |
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| CN104292506A (en) * | 2014-10-03 | 2015-01-21 | 上海工程技术大学 | Hyperbranched damping agent as well as preparation method and application thereof |
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| JP2002503740A (en) * | 1998-02-17 | 2002-02-05 | ワールド プロパティーズ インク． | Rubber shock-absorbing component and method of manufacturing the same |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106633242A (en) * | 2016-12-19 | 2017-05-10 | 嘉兴安基新材料科技有限公司 | High-modulus damping material and preparation method thereof |
| CN106967239A (en) * | 2017-03-21 | 2017-07-21 | 宁国思达塑胶制品有限公司 | A kind of anti-aging yielding rubber |
| CN109724040A (en) * | 2017-05-11 | 2019-05-07 | 衢州市联橙环保科技有限公司 | A kind of bottom music dazzling light lamp |
| CN109724040B (en) * | 2017-05-11 | 2020-06-12 | 嘉兴瀚睿电子科技有限公司 | Underwater music dazzling lamp |
| CN107011558A (en) * | 2017-05-25 | 2017-08-04 | 马成耀 | A kind of power generator yielding rubber and preparation method thereof |
| CN107011558B (en) * | 2017-05-25 | 2019-03-05 | 马成耀 | A kind of power generator yielding rubber and preparation method thereof |
| CN109181035A (en) * | 2018-09-03 | 2019-01-11 | 桐城运城制版有限公司 | A kind of gravure roller |
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