CN103724908B - Soft highly damping rubber composition and preparation method thereof - Google Patents
Soft highly damping rubber composition and preparation method thereof Download PDFInfo
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- CN103724908B CN103724908B CN201310747395.7A CN201310747395A CN103724908B CN 103724908 B CN103724908 B CN 103724908B CN 201310747395 A CN201310747395 A CN 201310747395A CN 103724908 B CN103724908 B CN 103724908B
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Abstract
The invention discloses a kind of soft highly damping rubber composition and preparation method thereof, said composition is by butyl rubber and poly-norbornene rubber and uses, not only improving the material damping scope of application, Applicable temperature is-40 to 80 DEG C, also improves material thermal resistance and ozone resistance to a certain extent；The present invention blended prepared wide temperature range, soft, high damping material, improving the damping material scope of application, the especially high damping under room temperature, vulcanite rebound degree is less than 1% at normal temperatures, 90% kinetic energy is converted into heat energy, thus playing the effect of maximum attenuation vibrations.Rubber composition provided by the present invention can be widely used for building, automobile and highly sophisticated device field to realize damping purpose.
Description
Technical field
The invention belongs to rubber materials, relate to a kind of rubber composition, be specifically related to a kind of soft highly damping rubber composition and preparation method thereof.
Background technology
Along with progress and the social development of science and technology, the control of vibration and noise has become a highly important engineering technology problem, is increasingly subject to the attention of various countries' research worker.The various methods controlling vibration and noise are widely used to the fields such as machinery, electronics, aerospace.
In the control technical measures of the various engineering vibration gone out in current R and D, damping vibration attenuation is a kind of effective way.For auto industry, the use of yielding rubber material is greatly improved the comfortableness of automobile, stability and safety.Now, existing many new materials and new technique are constantly applied to damping shock absorption, and wherein macromolecule damping shock absorption material increasingly causes the attention of people with the performance of its excellence.Adopt rubber damping material, be possible not only to reduce mechanical noise to greatest extent and alleviate mechanical vibration, improve work efficiency, and be very beneficial to improve the quality of product.
The damping behavior of elastomeric material is material when being subject to External Force Acting, and macromolecular chain segment produces relative motion, is the process of heat energy by changes mechanical energy.Wherein, the motion of macromolecular chain segment, substantially a relaxation.Elastomeric material varies with temperature three kinds of Mechanical Forms of appearance:
1. glassy state
Macromolecular chain segment kinergety is very low, and storage modulu is significantly high, and molecule singly-bound can only do more weak interior rotation under external force, main chain is nearly at frozen state, therefore mechanical energy can not be converted into thermal energy consumption and dissipates, and stores only as potential energy, and namely damping capacity is poor；
2. elastic state
Macromolecular chain segment easily moves, and macromolecular chain easily adapts to External Force Acting and stretches or curling, but can not absorb enough mechanical energy, and therefore the damping capacity of elastomeric material is not up to the best；
3. the form that glassy state changes to elastic state
Due to the synergism of the internal friction of macromolecular chain segment and segment, material damping performance is good, it is possible to absorb substantial amounts of vibrational energy.But, owing to the dynamic mechanical of rubber-like viscoelastic body is very big by the impact of use temperature, frequency of vibration, the glass transition temperature range (20-30 DEG C) of homopolymer is only small simultaneously, and therefore rubber damping material application in engineering field has very big limitation.
And norbornene monomer system is reacted generation by ethylene and cyclopentadiene through DielsAlder.Polynorbornene is then obtained in ring-opening polymerisation mode by norborene.The molecular weight of polymer is about 3,000,000 (g/mol), is about 30 times of general NBR specification, and glass transition temperature is about 37 DEG C, nonpolar, with Hydrocarbon, there is high affinity, and the oil content of itself weight 10 times can be absorbed, it is possible to realize high resiliency and high damping characteristic by different balanced constant, but it is narrow to be used alone poly-norbornene rubber ultimate damping interval, it is impossible to realize wide temperature zone high damping.
Existing general purpose rubber vitrification point Tg mostly is between-40 DEG C to-80 DEG C, and glass transition temperature range is narrow about 20-30 DEG C, resulting in material damping peak value and occur in less than 0 DEG C, damping characteristics can not meet various places and each seasonal temperature requirement simultaneously, causes the material scope of application limited.It addition, the basic hardness of rubber is about 40HA, prepares the hardness rubber less than 30HA and need to add substantial amounts of softening agent, the problem that softening agent precipitation, hydraulic performance decline easily occur.
The oil-filled preparation process of traditional polynorbornene is: powdery polynorbornene is dipped in a certain amount of oil plant, it is elastomeric state to polynorbornene, again oil-filled rear polynorbornene is added auxiliary agent and carries out mixing, program rubber compounding weak effect, not mixing uniform polynorbornene granule easily occurs, rubber bodies exists stress concentrate, reduce product service life；Directly buying pre-oiling polynorbornene can avoid Similar Problems, but relative cost is higher, and market pre-oiling is identical with non-oil-filled polynorbornene powder price according to norborene price, and polynorbornene price, far above oil price, differs nearly more than 10 times.
Chinese invention patent CN101205336 discloses " a kind of compositions for making low-hardness rubber material ", with mass ratio with 25-35/75-65 of ethylene propylene diene rubber and poly-norbornene rubber and use, with naphthenic oil for softening agent, with dimorpholinyl disulfide for vulcanizing agent.The Third monomer of ethylene propylene diene rubber used is ethylidene norbornene, and propylene content is between 20-30% mass.It is to improve its ozone resistance that polynorbornene wherein used shares with EP rubbers.But, selecting EP rubbers propylene content in this system is 20-30%, and relatively low, material is easily crystallization at low temperatures, and modulus substantially increases, poor performance at low temperatures；Additionally when 23 DEG C, the damped coefficient of EPDM is 0.077, and far below the 0.7 of butyl rubber, damping is poor.
Chinese invention patent CN101418109 discloses one " the high temperature and high damping resistant rubber composition based on poly-norbornene rubber ", said composition is based on the blending of poly-norbornene rubber Yu silicone rubber is blended, blended solubilizing agent is blended for poly-norbornene rubber with silicone rubber with the blend of ethylene-methyl acrylate copolymer with ethylene propylene diene rubber, it is equipped with 2 simultaneously, 5-dimethyl-2,5(t-butyl peroxy) hexane is vulcanizing agent, vinyltriacetoxy silane is coupling agent.Sizing material is mixing in 130 DEG C of banburies to be formed.The polynorbornene wherein used and silicone rubber with being thermostability in order to improve material.But, the damped coefficient 0.05-0.1 of silicone rubber is less, and its damping, not as good as butyl rubber, can cause the effect that the damping and amortization of blended rubber reduces.
Chinese invention patent CN1789326 discloses one " high-damping oil-resistant rubber composition ", and based on the blending of poly-norbornene rubber Yu nitrile rubber is blended, with cumyl peroxide for co-crosslinker, triallyl isocyanurate is assistant crosslinking agent.The acrylonitrile content of described nitrile rubber is 23-30%.The blending blending ratio of poly-norbornene rubber and nitrile rubber, is 85-75/15-25, it is preferable that 80/20 by weight.The polynorbornene wherein used and nitrile rubber for improving the oil resistivity of material.But, nitrile rubber is because containing acrylonitrile, for polar group, very easily crystallization under cryogenic conditions, black brittleness is poor, and ozone resistance is poor.
Summary of the invention
The technical problem to be solved in the present invention, it is to provide a kind of soft highly damping rubber composition and preparation method thereof, said composition is by butyl rubber and poly-norbornene rubber and uses, not only improve the material damping scope of application to-40 DEG C to 80 DEG C, and improve thermostability and the ozone resistance of material to a certain extent；Blended prepared wide temperature range, soft, high damping material, improve the damping material scope of application, the especially high damping under room temperature, and namely under room temperature, 90% kinetic energy, less than 1%, is converted into heat energy by vulcanite rebound degree, thus playing maximum attenuation shock effect.The preparation method of the present invention adopts and is preheated by polynorbornene, improve polynorbornene banding characteristics, by the process that mixing limit, limit is refueled, it is to avoid the appearance of the not mixing uniformity problem of polynorbornene granule, in ensureing durability of product, occupy great cost advantage.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of soft highly damping rubber composition, it includes the component of following parts by weight:
Poly-norbornene rubber 70-90 part, butyl rubber 10-30 part, zinc oxide 2.0-5.0 part, stearic acid 0.5-1.0 part, reinforcement system 30-50 part, softening plasticizer 100-150 part, viscosifier 40-80 part, accelerator 5.5 parts, vulcanizing agent 2.0 parts.
Prior art is improve for performance shortcomings such as polynorbornene thermostability, ozone resistance differences, it is considered that the ageing-resistant performance of material, and the starting point of the present invention is material damping performance, by with the same butyl rubber with high damping using, not only ensure that the damping and amortization of material, also widen the damping temperature domain of material, prepare maximum damping value under Applicable temperature.
As a kind of restriction of the present invention, the weight ratio of poly-norbornene rubber and butyl rubber is 9:1, i.e. poly-norbornene rubber 90 parts, butyl rubber 10 parts.Along with the increase of butyl rubber consumption, vulcanite compliance can decline, and feel is deteriorated, and when butyl rubber consumption is lower than 10 parts, low temperature damping is deteriorated.
As the another kind of restriction of the present invention, described reinforcement system is the modified potter's clay of Sa Bofei S503 sheet, and manufacturer is emerging new high-tech material company limited of Zaozhuang City three.Selecting sheet filler, when the elastomeric material of laminal filter is deformed by External Force Acting, can there is orientation in laminal filter, so that producing friction between filler and rubber, plays the effect of noise reduction.Sheet modifiies potter's clay, by potter's clay is carried out graft modification, general method of modifying is by organic alkane ammonium chloride, such as double; two octadecyl trimethyl ammonium chloride, monomer is initially inserted into potter's clay sheet interlayer under certain condition, then at external influence, as made it be polymerized under oxygen, light, heat, initiator or electronic action.The amount of heat released during polymerization is utilized to come the Coulomb force of gram sheet interlayer, lamella is made to expand, simultaneously by chemical treatments such as ion exchanges, by partially grafted for organic alkane on potter's clay molecule, improve potter's clay to be combined with rubber organic macromolecule, being conducive to potter's clay to be combined with rubber molecule, employing is similar compatibility principle, is mutually restricted by intermolecular force.
The third as the present invention limits, and described softening plasticizer is high viscosity naphthenic oil.Because poly-norbornene rubber vitrification point Tg is 37 DEG C, substantial amounts of softening agent need to be added to reduce its vitrification point, it is achieved it is rubber elastomer characteristics at normal temperatures.Softening agent viscosity height can reduce its rubbing action to macromolecular chain and storeroom under normal circumstances, namely adopts the oil that viscosity is high in damping material, as softening plasticizer as far as possible.This technology adopts naphthenic oil H-6801 (technical specification: at foundation GB265100 DEG C, viscosity is 19.51mm2/s).
As the 4th kind of restriction of the present invention, described viscosifier are the mixture of the coumarone indene resin of weight ratio 3-5:1-3 and phenolic resin.In the present invention, the interpolation of viscosifier can improve tack of materials, increases intermolecular friction power, vibration energy is converted into thermal energy consumption and dissipates, thus playing the effect improving material damping；Tackifying resin can adjust polymer glass temperature Tg.
The present invention also has one to limit, and the accelerator stated is accelerator CBS (sulfenamide type accelerators) 4.5 parts and accelerator EZ(dithiocarbamates Carbamates accelerator) mixture of 1.0 parts.Along with the increase of the degree of cross linking, the damping temperature range of material becomes big, and the degree of cross linking is suitable, is conducive to improving the damping capacity of material.Accelerator is with sulfenamide for primary accelerator, and dithiocarbamates Carbamates accelerator EZ is auxiliary accelerator, it is ensured that while sizing material has suitable state of cure (vulcanization), have curingprocess rate faster.
As the 6th kind of restriction of the present invention, the molecular weight of described poly-norbornene rubber is 3000000g/mol.Poly-norbornene rubber is obtained in ring-opening polymerisation mode by norborene.The molecular weight of polymer is about 3000000 (g/mol), is about 30 times of general NBR specification；Glass transition temperature is about 37 DEG C, nonpolar；Its Tg can be adjusted by different balanced constant, obtain very big damping value under different temperatures.
If on the upside of rubber molecular chain matrix long-pending compared with big, quantity is many, polarity is big and intermolecular hydrogen bonding is many, it is good to act on strong rubber damping performance.And butyl rubber has more pending methyl group, molecule segment athletic meeting produces bigger friction, has the damping and amortization of excellence；It addition, butyl rubber glass transition temperature (Tg) is-70 DEG C, its Internal Friction Peak can be continued until 20 DEG C from-70 DEG C, is the comparatively wide damping material in a kind of effective efficiency district；Fissipation factor (tag δ) variation with temperature and change, a maximum is had at about-30 DEG C, what the size of fissipation factor represented is the viscoelastic property of material, the stickiness of the more big illustrative material of fissipation factor is more big, the elasticity of the more little illustrative material of fissipation factor is more big, can represent the state of material in certain scope.
As the further restriction of above-mentioned restriction, the preparation method of described poly-norbornene rubber carries out according to following steps order:
1. mill temperature is increased to 100 DEG C；
2. by preheating 20min when being preheated to 100 parts of poly-norbornene rubbers of 140 DEG C, mixing in the mill of 100 DEG C, design temperature is 100-120 DEG C, and roll spacing adjusts 0-0.5mm；Preheating, only for poly-norbornene rubber, is inelastic body state because of it at normal temperatures, and the purpose of preheating is it fully to be heated, it is simple to molding on a mill until, improves calendering process.
3. after polynorbornene is in blocks, adds 150 parts of high viscosity naphthenic oils, forms blend P；
Wherein, the rate of addition of high viscosity naphthenic oil is 5-13ml/ time, often drips after once, treats that polynorbornene and high viscosity naphthenic oil are sufficiently mixed, then carries out interpolation next time, so, until high viscosity cycloalkanes oil mass fills up；
The present invention is with 300g polynorbornene, and the initial stage adds about 5ml/ time every time, improves addition, be up to 13ml after the complete molding bag roller of polynorbornene, and principle do not spill over oil plant, be beneficial to oil plant is mixed into polynorbornene and is limited.Being sufficiently mixed i.e. polynorbornene and high viscosity naphthenic oil to be sufficiently mixed, under the effect of shearing force, oil plant is dispersed between polynorbornene macromolecular chain；Decision principle: polynorbornene surface, mill mixer roller surface are without unabsorbed softening agent.
4. blend P will add the zinc oxide of 2.0-5.0 part, the stearic acid of 0.5-1.0 part, the potter's clay of 30-50 part, the coumarone indene resin of 30-50 part, the phenolic resin of 10-30 part, the accelerator CBS of 4.5 parts, the accelerator EZ of 1.0 parts, the sulfur of 2.0 parts, carries out mixing in banbury or mill, obtains poly-norbornene rubber finished product.
Wherein, mixer mixing step is as follows:
(rotating speed: 40-45 turns/min, dump temperature 135 ± 2 DEG C to oil-filled rear poly-norbornene rubber/butyl rubber → mixer mixing, and charging sequence: small powder, including zinc oxide, stearic acid, resin etc.；Fructus Anisi Stellati, potter's clay；Vulcanization accelerator, including sulfur, accelerator etc.) → mill compression molding (roll spacing: 4-5mm).
Mill mixing step is as follows:
(roller speed: material order: small powder, including zinc oxide, stearic acid, resin etc. for roll spacing: 1.5-3mm, roller temperature: 70 ± 5 DEG C in oil-filled poly-norbornene rubber/butyl rubber → mill；Fructus Anisi Stellati, potter's clay；Vulcanization accelerator, including sulfur, accelerator etc.) → compression molding (roll spacing: 4-5mm).
Rubber is as a kind of macromolecular material, and the key character of its deformation character is viscoelasticity, and damping action mechanism is directly and the dynamic mechanical lusitropic qualitative correlation of high polymer.When macromolecular material absorbs vibrational energy, the mechanical energy of absorption is partially converted into heat energy and dissipates, play damping action.Macromolecular material damping action size depends on the size of hysteresis, and its response lag is in stress, and due to hysteresis, the stretching retraction circulation change of polymer is both needed to overcome the intersegmental internal friction resistance of chain and in-fighting.High polymer is glass zone below glass transition temperature Tg, modulus is significantly high, molecule is little to motion, therefore mechanical energy cannot also be distributed, and energy is stored as potential energy, consume is not transformed into heat energy, when elastomeric state, molecular motion is easy to, enough mechanical energy can not be absorbed, and in very narrow glassy transition district, the modulus of polymer significantly declines, and along with obvious mechanical damping characteristic, at this moment high polymer has sufficiently high fissipation factor, it is possible to absorb vibrational energy in large quantities.Although some polymer has more satisfactory fissipation factor, but its glassy state temperature transition district is extremely narrow, homogenous material is not suitable for the instructions for use of broad temperature, broadband damping, require over the modes such as blended, block to be merged by the material of two or more different glass transition temperature Tg, wide temperature range damping damping material could be prepared.
Present invention also offers the method preparing above-mentioned soft highly damping rubber composition, carry out according to following steps order:
(1) feeding
Take the raw material of formula ratio, standby；
(2) preheating
The poly-norbornene rubber raw material of formula ratio is preheated at 138-142 DEG C 20min, obtains the poly-norbornene rubber raw material A after preheating；
(3) refining is opened
Poly-norbornene rubber raw material A after preheating is put in mill and at 100-120 DEG C, opens refining, adjustment roll spacing is 0-0.5mm, design temperature is 65-75 DEG C, add the high viscosity naphthenic oil of formula ratio, again butyl rubber is added mix homogeneously after mixing fully, after add zinc oxide, stearic acid, viscosifier, reinforcement system, vulcanizing agent, accelerator successively, until material is fully mixed in rubber matrix, formed rubber B；
(4) slice
Being put into by rubber B between mill roll spacing, adjust the roll spacing of mill to 4-5mm, after clot, the mill of vertical input carries out clot again, and this process circulates 5 times, is pulled out by film, makes slice sizing material C;
(5) cooling
Being placed in interleaving agent tank by slice sizing material C, water temperature is adjusted to 8-12 DEG C, parks 1-2min, forms sizing material D；
(6) park
Being placed on shelf by sizing material D, parking 8-168h(effect duration in normal temperature environment is 7 days), form elastomeric compound D；
(7) sulfuration
Being vulcanized by elastomeric compound D, this sulfidation is injection-molding, and locked mode pressure is 170Kg/cm2, and temperature is 155-165 DEG C, and cure time is 900s, ultimately forms soft highly damping rubber composition.
Owing to have employed above-mentioned technical scheme, compared with prior art, acquired technological progress is in that the present invention:
Soft highly damping rubber composition and preparation method thereof, by butyl rubber and poly-norbornene rubber use, not only increases the material damping scope of application, can also improve material thermal resistance and ozone resistance to a certain extent；Viscosifier used in the present invention, it is possible to improve tack of materials, increase intermolecular friction power, vibration energy are converted into thermal energy consumption and dissipate, thus playing the effect improving material damping；Tackifying resin can adjust polymer glass temperature Tg；Blended energy prepares wide temperature range, soft, high damping material, improves the damping material scope of application.Especially the high damping under room temperature, namely under room temperature, 90% kinetic energy, less than 1%, is converted into heat energy by vulcanite rebound degree, thus playing maximum attenuation shock effect.
The present invention adopts and is preheated by polynorbornene, improves polynorbornene banding characteristics, by the process that mixing limit, limit is refueled, it is to avoid the appearance of the not mixing uniformity problem of polynorbornene granule, in ensureing durability of product, occupies great cost advantage.
The present invention prepares damping temperature domain-40～50 DEG C, and butyl rubber exists damping peak value at-30 DEG C, and by adjusting softening agent consumption, damping peak value can occur within the scope of the arbitrary temp of 0-30 DEG C in poly-norbornene rubber；Because polynorbornene has strongly lipophilic, it is possible to add a large amount of softening agent, reduce vulcanite hardness, it is easy to prepare the Hs low-durometer material less than 30HA.
Soft highly damping rubber composition provided by the present invention, it is adaptable to the fields such as building, automobile and highly sophisticated device realize damping purpose.
The present invention is described in further detail below in conjunction with specific embodiment.
Detailed description of the invention
1 one kinds of soft highly damping rubber compositions of embodiment and preparation method thereof
A kind of soft highly damping rubber composition, it includes following components:
Poly-norbornene rubber 90g, butyl rubber rubber 10g, zinc oxide 5.0g, stearic acid 0.8g, Sa Bofei S503 sheet modifiy potter's clay 40g；
High viscosity naphthenic oil 120g, coumarone indene resin 40g, phenolic resin 20g；
Accelerator CBS 4.5g, accelerator EZ1.0g, sulfur 2.0g；
Wherein, the molecular weight of described poly-norbornene rubber is 3000000g/mol.
The preparation method of described poly-norbornene rubber carries out according to following steps order:
1. mill temperature is increased to 100 DEG C；
2. by preheating 20min when being preheated to 100 parts of poly-norbornene rubbers of 140 DEG C, mixing in the mill of 100 DEG C, design temperature is 120 DEG C, and roll spacing adjusts 0.3mm；
3. after polynorbornene is in blocks, adds 150 parts of high viscosity naphthenic oils, forms blend P；
Wherein, the rate of addition of high viscosity naphthenic oil is 5ml/ time, treats that polynorbornene and high viscosity naphthenic oil are sufficiently mixed every time, then carry out interpolation next time after adding, so, until high viscosity cycloalkanes oil mass fills up；
4. blend P will add the zinc oxide of 3.0 parts, the stearic acid of 0.8 part, the potter's clay of 40 parts, the coumarone indene resin of 40 parts, the phenolic resin of 20 parts, the accelerator CBS of 4.5 parts, the accelerator EZ of 1.0 parts, the sulfur of 2.0 parts, carries out mixing in banbury or mill, obtains poly-norbornene rubber finished product.
The method of soft highly damping rubber composition, carries out according to following steps order:
(1) feeding
Take the raw material of formula ratio, standby；
(2) preheating
The poly-norbornene rubber raw material of formula ratio is preheated at 140 DEG C 20min, obtains the poly-norbornene rubber raw material A 1 after preheating；
(3) refining is opened
Poly-norbornene rubber raw material A after preheating is put in mill and at 100 DEG C, opens refining, adjustment roll spacing is 0.3mm, design temperature is 65 DEG C, add the high viscosity naphthenic oil of formula ratio, again butyl rubber is added mix homogeneously after mixing fully, after add zinc oxide, stearic acid, viscosifier, reinforcement system, vulcanizing agent, accelerator successively, until material is fully mixed in rubber matrix, formed rubber B1；
(4) slice
Being put into by rubber B1 between mill roll spacing, adjust the roll spacing of mill to 4mm, after clot, the mill of vertical input carries out clot again, and this process circulates 5 times, is pulled out by film, makes slice sizing material C1;
(5) cooling
Being placed in interleaving agent tank by slice sizing material C1, water temperature is adjusted to 10 DEG C, parks 1min, forms sizing material D1；
(6) park
Sizing material D is placed on shelf, normal temperature environment is parked 8h, form elastomeric compound D；
(7) sulfuration
Being vulcanized by elastomeric compound D, this sulfidation is injection-molding, and locked mode pressure is 170Kg/cm2, and temperature is 155 ± 165 DEG C, and cure time 900 is s, ultimately forms soft highly damping rubber composition.
Embodiment 2-6 soft highly damping rubber composition and preparation method thereof
Embodiment 2-6 is a kind of soft highly damping rubber composition and preparation method thereof respectively.
Embodiment 2-6 and the difference of embodiment 1, be only that its constituent content, different, shown in table specific as follows:
Embodiment 2-6 poly-norbornene rubber preparation parameter table
Above, it is only presently preferred embodiments of the present invention, is not the restriction that the present invention is made other form.Any those skilled in the art, it is possible to use above-mentioned technology contents, as enlightenment, is changed or be modified as the Equivalent embodiments of equivalent variations.But every without departing from technical solution of the present invention content, the technical spirit of the foundation present invention, to the simple modification done by above example, equivalent variations and remodeling, still falls within the protection domain of the claims in the present invention.
Claims (8)
1. a soft highly damping rubber composition, it is characterised in that in parts by weight, it includes following components:
Poly-norbornene rubber 70-90 part, butyl rubber 10-30 part, zinc oxide 2.0-5.0 part, stearic acid 0.5-1.0 part, reinforcement system 30-50 part, softening plasticizer 100-150 part, viscosifier 40-80 part, accelerator 5.5 parts, vulcanizing agent 2.0 parts；
Wherein, described reinforcement system is the modified potter's clay of Sa Bofei S503 sheet.
2. soft highly damping rubber composition according to claim 1, it is characterised in that: the weight ratio of poly-norbornene rubber and butyl rubber is 9:1.
3. soft highly damping rubber composition according to claim 1, it is characterised in that: described softening plasticizer is high viscosity naphthenic oil.
4. soft highly damping rubber composition according to claim 1, it is characterised in that: described viscosifier are the mixture of the coumarone indene resin of weight ratio 3-5:1-3 and phenolic resin.
5. soft highly damping rubber composition according to claim 1, it is characterised in that: described accelerator is the mixture of accelerator CBS 4.5 parts and accelerator EZ1.0 part.
6. soft highly damping rubber composition according to claim 1, it is characterised in that: the molecular weight of described poly-norbornene rubber is 3000000g/mol.
7. soft highly damping rubber composition according to claim 6, it is characterised in that: the preparation method of described poly-norbornene rubber carries out according to following steps order:
1. mill temperature is increased to 100 DEG C；
2. by preheating 20min when being preheated to 100 parts of polynorbornenes of 140 DEG C, mixing in the mill of 100 DEG C, sets melting temperature as 100-120 DEG C, roll spacing adjustment 0-0.5mm；
3. after polynorbornene is in blocks, adds 150 parts of high viscosity naphthenic oils, forms blend P；
Wherein, the rate of addition of high viscosity naphthenic oil is 5-13ml/ time, often drips after once, treats that polynorbornene and high viscosity naphthenic oil are sufficiently mixed, then carries out interpolation next time, so, until high viscosity cycloalkanes oil mass fills up；
4. blend P will add the zinc oxide of 2.0-5.0 part, the stearic acid of 0.5-1.0 part, the potter's clay of 30-50 part, the coumarone indene resin of 30-50 part, the phenolic resin of 10-30 part, the accelerator CBS of 4.5 parts, the accelerator EZ of 1.0 parts, the sulfur of 2.0 parts, carries out mixing in banbury or mill, obtains poly-norbornene rubber finished product.
8. the method for the soft highly damping rubber composition that a kind is prepared according to any one of claim 1-7, it is characterised in that it carries out according to following steps order:
(i) feeding
Take the raw material of formula ratio, standby；
(ii) preheat
The poly-norbornene rubber raw material of formula ratio is preheated at 138-142 DEG C 20min, obtains the poly-norbornene rubber raw material A after preheating；
(iii) open refining
Poly-norbornene rubber raw material A after preheating is put in mill and at 100-120 DEG C, opens refining, adjustment roll spacing is 0-0.5mm, design temperature is 65-75 DEG C, add the high viscosity naphthenic oil of formula ratio, again butyl rubber is added mix homogeneously after mixing fully, after add zinc oxide, stearic acid, viscosifier, reinforcement system, vulcanizing agent, accelerator successively, until material is fully mixed in rubber matrix, formed rubber B；
(iv) slice
Being put into by rubber B between mill roll spacing, adjust the roll spacing of mill to 4-5mm, after clot, the mill of vertical input carries out clot again, and this process circulates 5 times, is pulled out by film, makes slice sizing material C;
(v) cool down
Being placed in interleaving agent tank by slice sizing material C, water temperature is adjusted to 8-12 DEG C, parks 1-2min, forms sizing material D；
(vi) park
Sizing material D is placed on shelf, normal temperature environment is parked 8-168h, form elastomeric compound D；
(vii) vulcanize
Being vulcanized by elastomeric compound D, this sulfidation is injection-molding, and locked mode pressure is 170Kg/cm2, and temperature is 155-165 DEG C, and cure time is 900s, ultimately forms soft highly damping rubber composition.
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| CN104130539B (en) * | 2014-08-11 | 2016-08-17 | 上海经纬峰实业有限公司 | A kind of fire-retardant highly damping rubber composition based on poly-norbornene rubber |
| CN104830007B (en) * | 2015-04-09 | 2017-05-17 | 茂泰(福建)鞋材有限公司 | High-damping foaming material and preparation method thereof |
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