CN103602025B - A kind of High molecular material for vibration attenuation of automobile - Google Patents
A kind of High molecular material for vibration attenuation of automobile Download PDFInfo
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- CN103602025B CN103602025B CN201310543096.1A CN201310543096A CN103602025B CN 103602025 B CN103602025 B CN 103602025B CN 201310543096 A CN201310543096 A CN 201310543096A CN 103602025 B CN103602025 B CN 103602025B
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Abstract
The invention provides a kind of antidetonation vibration damping fade performance with excellence, resilient flexible, gross distortion resistance, weathering resistance, weather resistance and the little High molecular material for vibration attenuation of automobile of temperature dependency, described material has following formula: with parts by weight, polystyrene-poly isobutylene block copolymer 25-30 part, polystyrene-poly iso-butylene-polystyrene block copolymer 35-40 part, chlorinated butyl rubber 20-25 part, sym-propene polymer resin 10-15 part, and polystyrene-poly isobutylene block copolymer, polystyrene-poly iso-butylene-polystyrene block copolymer, chlorinated butyl rubber and sym-propene polymer resin add up to 100 parts, mineral filler 10-20 part, dicumyl peroxide 0.2-0.6, hydrogenated petroleum resin 15-20 part, paraffin oil 10-15 part.
Description
Technical field
The present invention relates to automotive material technical field, a kind of High molecular material for vibration attenuation of automobile with excellent vibration and noise reducing performance is particularly provided.
Background technology
Along with the development of Chinese national economy and the raising day by day of living standards of the people, automobile has become requisite in people's daily life, work rides instead of walk, recreation tool, therefore for car steering and the comfortableness taken, also more and more becoming the focus that buyer pays close attention to, is the important indicator weighing automotive quality.And the vibration & noise in car, affect the principal element of car steering and riding comfort beyond doubt.
In order to reach the requirement of vehicle vibration damping noise reduction, in the manufacturing of automobile, generally use damping property excellence, lightweight high molecular polymer as the damping material of automobile.The rubber damping material such as, used in tradition, there is quality light, the advantages such as shock resistance and easy absorbing high-frequency vibration, add the raising of rubber and metal bonding technology, the rubber bushing that metal and building rubber compound get up to be formed is widely used in the trolley parts such as the bracing or strutting arrangement of automotive suspension, but in order to improve the extinction efficiency improving rubber damping material, often need to add a large amount of carbon blacks wherein, the mineral fillers such as silicon oxide, or rosin, petroleum resin tackiness agent, but along with automobile improving constantly for damping requirements, continue the content improving mineral filler in rubber, the difficulty of product manufacturing is caused by making the moulding processability of material be difficult to meet the demands, add elastomeric material heat-resisting, weathering resistance is poor, often can not adapt to harsh and unforgiving environments when automobile uses.Heat-curable urethane foam material is also a kind of vehicle vibration damping material widely used, but the volume of foam material is often larger, need this just nervous motor space of waste, and it is declining very large through collision rift physical property repeatedly, damping performance is directly caused significantly to reduce, in addition thermosetting material is difficult to by the moulding process such as injection moulding, mold pressing shaping, and material itself again can not effectively recycling, the requirement of its also vehicle vibration damping material more and more difficult to deal with.
Thermoplastic elastomer a kind ofly has good snappiness, can demonstrate good rubber like elasticity and have the brand-new material of satisfied damping property at ambient temperature, such as styrene-butadiene-styrene block copolymer etc., but existing thermoplastic elastomer damping material also exists, and permanentset is not enough or temperature dependency is large waits deficiency.
Therefore, research and develop a kind of formula with the High molecular material for vibration attenuation of automobile of excellent and stable use properties and the complete processing adapted with it, have great importance and be worth.
Summary of the invention
Namely object of the present invention is to provide a kind of novel formula with the High molecular material for vibration attenuation of automobile of excellent and stable use properties.
The formula of the High molecular material for vibration attenuation of automobile in the present invention is as follows: with parts by weight, polystyrene-poly isobutylene block copolymer 25-30 part, polystyrene-poly iso-butylene-polystyrene block copolymer 35-40 part, chlorinated butyl rubber 20-25 part, sym-propene polymer resin 10-15 part, and polystyrene-poly isobutylene block copolymer, polystyrene-poly iso-butylene-polystyrene block copolymer, chlorinated butyl rubber and sym-propene polymer resin add up to 100 parts, mineral filler 10-20 part, dicumyl peroxide 0.2-0.6, hydrogenated petroleum resin 15-20 part, paraffin oil 10-15 part.
In described polystyrene-poly isobutylene block copolymer, the content of polystyrene is 20-30%, and the scope of its number-average molecular weight is between 150000-200000.
In described polystyrene-poly iso-butylene-polystyrene block copolymer, the content of polystyrene is 50-60%, and the scope of its number-average molecular weight is between 150000-200000.
The cl content of described chlorinated butyl rubber is at 1.5-2%.
Described mineral filler is the mixture of silicon oxide and calcium carbonate, and the part by weight of the two is 1:1.
The softening temperature of described hydrogenated petroleum resin is less than 100 DEG C.
As preferably, polystyrene-poly isobutylene block copolymer 28 parts;
As preferably, polystyrene-poly iso-butylene-polystyrene block copolymer 37 parts;
As preferably, chlorinated butyl rubber 22 parts;
As preferably, sym-propene polymer resin 13 parts;
As preferably, mineral filler 16 parts;
As preferably, dicumyl peroxide 0.4;
As preferably, hydrogenated petroleum resin 18 parts;
As preferably, paraffin oil 12 parts.
Namely advantage of the present invention is, the reasonable design formula of High molecular material for vibration attenuation of automobile, by the interaction between each component and influence each other, obtain the High molecular material for vibration attenuation of automobile with excellent and stable use properties, described macromolecular material has excellent forming property, damping property and temperature dependency.
Embodiment
Content of the present invention is described in detail below by specific embodiment.
Embodiment 1.
Carry out preparing burden according to each component proportion given by table 1 and dry to 100 DEG C for subsequent use;
Operation one: first polystyrene-poly isobutylene block copolymer, polystyrene-poly iso-butylene-polystyrene block copolymer and chlorinated butyl rubber are mixed, then add the half of mineral filler dosage, hydrogenated petroleum resin, paraffin oil dosage 1/3rd, then in plastics processing mill, melting mixing is implemented, mixing temperature is 150 DEG C, and the mixing time is 3 minutes;
Operation two: add the further melting mixing of dicumyl peroxide subsequently and be cross-linked, the mixing time is 5 minutes;
Operation three: join in mixing product by sym-propene polymer resin and remaining mineral filler, improves plastics processing mill temperature to 180 DEG C, and melting mixing, after 10 minutes, takes out the mixing product of gained;
Operation four: by the mixing product heats to 180 DEG C of operation three, hot compacting under the pressure of 6MPa, obtains the macromolecular material for Performance Detection.
Outside embodiment 2-4 and comparative example 1*-6* formula is as shown in table 1, preparation method is all identical with embodiment 1.
Table 1
1. show 1A-H and represent polystyrene-poly isobutylene block copolymer, polystyrene-poly iso-butylene-polystyrene block copolymer, chlorinated butyl rubber, sym-propene polymer resin, mineral filler, dicumyl peroxide, hydrogenated petroleum resin, paraffin oil successively;
2. the calculating of equivalent shear modulus and attenuation equivalent constant is respectively:
with
wherein K
eqfor equivalent stiffness, t
rfor shearing thickness, A be shear area, Δ W is energy absorption energy, W is elastic deformation energy;
3. the test condition of durable time number be under 20 DEG C of conditions with the deflection repeated deformation of 300% until can not original shape be replied;
4. tension set records under condition in compression for 100 DEG C × 22 hours.
Polystyrene-poly isobutylene block copolymer is the basis that material system of the present invention has good attenuation performance, therefore its content at least should more than 25 parts, but too much polystyrene-poly isobutylene block copolymer can have influence on other component effects, its content therefore should be controlled below 30 parts.In addition for ensureing good attenuation performance, in polystyrene-poly isobutylene block copolymer, the content of polystyrene at least should be 20%, be the intensity of guarantee system simultaneously, the number-average molecular weight of polystyrene-poly isobutylene block copolymer should more than 150000, but consider and shape performance, should be controlled it below 200000.
Polystyrene-poly iso-butylene-polystyrene block copolymer has material impact for the weather resistance improving the processing characteristics of system, elongation at break and system, if its content is too low play above-mentioned effect by being difficult to, but too much proportioning can not correspondingly improve above-mentioned performance, the performance of other component effects can be affected on the contrary, therefore should control its content below 40 parts.For obtaining performances such as improving elongation at break, the content of the polystyrene in polystyrene-poly iso-butylene-polystyrene block copolymer should between 50-60%, excessive too small its performance playing optimum that is all unfavorable for, simultaneously based on reason identical above, its number-average molecular weight should between 150000-200000.
Chlorinated butyl rubber not only has material impact for the good attenuation performance of system entirety and durable usability, and weathering resistance and the ageing resistance of system can be significantly improved, and system can be made to obtain very little gas-premeable, in addition the recoverable of system can be improved, therefore the existence of chlorinated butyl rubber is extremely necessary, for playing above effect, its content at least should be 20 parts, but excessive interpolation then can affect the performance of other component effectiveness, should be controlled it and be less than 25 parts.In addition, crosslinked in order to appropriateness, thus the flexibility etc. of guarantee system, should control cl content in chlorinated butyl rubber at 1.5-2%, too high content will cause being cross-linked the excessively problem such as initiator system much higher hard, processibility deterioration, too low then likely crosslinked abundant not.
The interpolation of sym-propene polymer resin can play the effect improving tension set, but excessive interpolation not only can not continue to improve tension set, it can be caused on the contrary to decline to some extent, and be also unfavorable for the performance of other component effectiveness, therefore controlling its content in system of the present invention is 10-15 part simultaneously.
As typical mineral filler, silicon oxide can significantly improve the fade performance of system, if but its addition is too much, then and the processing characteristics of system not only can be caused to decline, also can affect the elastic performance of system under aximal deformation value and the endurance quality of system.And calcium carbonate is also conventional mineral filler, by it to add with silicon oxide same ratio, the fade performance of system can be improved better, both the simultaneously interpolation of calcium carbonate and hydrogenated petroleum resin dispersed, can work in coordination with and play raising system fade performance, particularly improve temperature dependency and elongation at break.But mineral filler is added needs strict control, otherwise will the elongation at break of extreme influence system, temperature dependency and processibility etc.
Dicumyl peroxide is the most suitable for the crosslinked action in body series, its appropriate interpolation can obtain corresponding crosslinked, thus the decay of system under gross distortion condition, elastic performance can be improved, and weather resistance, its content is crossed major general and is difficult to play above-mentioned performance, and its content too much not only can not play above-mentioned performance, also can the hardness of excessive increase system, make distortion difficulty and cause processibility to worsen.
Hydrogenated petroleum resin is even must be scattered in fade performance and the temperature dependency that effectively can improve system in system, also improves the elongation at break of system to a certain extent simultaneously, and it collaboratively with calcium carbonate to a certain extent functions as described above.For playing above-mentioned effect, softening temperature should be selected to be less than the kind of 100 DEG C, and ensure that addition is greater than 15 parts, hydrogenated petroleum resin just can be made dispersed.But excessive interpolation can reduce above-mentioned performance on the contrary, not only so, system also can be made too to adhere, thus worsen processibility.
Paraffin oil is conventional softening agent, its interpolation in system of the present invention can be good at playing the effect improving weather resistance under gross distortion condition, for giving full play to above-mentioned effect, at least should ensure that its content is more than 10 parts, but excessive is added with superfluous risk of overflowing, thus affecting the combination of itself and other such as metal products, the intensity that also can reduce system causes formability problem etc.Therefore to control it and be less than 15 parts.
In addition, for obtaining the optimum performance of system, in operation one, two, in order to guarantee abundant melting mixing, melting temperature can not be too low, otherwise the insufficient wretched insufficiency that will cause material properties of melting, but mixing temperature is also unsuitable too high, otherwise the pyrolysis of polymkeric substance can be caused, and then reduce fade performance, endurance quality and tension set etc.And the time crosslinked in operation two must be suitable, excessively crosslinked or crosslinked insufficient, all can affect the fade performance of system, endurance quality and tension set etc.
Claims (3)
1. a High molecular material for vibration attenuation of automobile, it is characterized in that there is following formula: with parts by weight, polystyrene-poly isobutylene block copolymer 25-30 part, polystyrene-poly iso-butylene-polystyrene block copolymer 35-40 part, chlorinated butyl rubber 20-25 part, sym-propene polymer resin 10-15 part, and polystyrene-poly isobutylene block copolymer, polystyrene-poly iso-butylene-polystyrene block copolymer, chlorinated butyl rubber and sym-propene polymer resin add up to 100 parts, mineral filler 10-20 part, dicumyl peroxide 0.2-0.6, hydrogenated petroleum resin 15-20 part, paraffin oil 10-15 part, in described polystyrene-poly isobutylene block copolymer, the content of polystyrene is 20-30%, and the scope of its number-average molecular weight is between 150000-200000, in described polystyrene-poly iso-butylene-polystyrene block copolymer, the content of polystyrene is 50-60%, and the scope of its number-average molecular weight is between 150000-200000, the cl content of described chlorinated butyl rubber is at 1.5-2%, described mineral filler is the mixture of silicon oxide and calcium carbonate, and the part by weight of the two is 1:1.
2. macromolecular material according to claim 1, is characterized in that: the softening temperature of described hydrogenated petroleum resin is less than 100 DEG C.
3. macromolecular material according to claim 1, is characterized in that: polystyrene-poly isobutylene block copolymer 28 parts; Polystyrene-poly iso-butylene-polystyrene block copolymer 37 parts; Chlorinated butyl rubber 22 parts; Sym-propene polymer resin 13 parts; Mineral filler 16 parts; Dicumyl peroxide 0.4; Hydrogenated petroleum resin 18 parts; Paraffin oil 12 parts.
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| CN201310543096.1A CN103602025B (en) | 2013-11-05 | 2013-11-05 | A kind of High molecular material for vibration attenuation of automobile |
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| CN201310543096.1A CN103602025B (en) | 2013-11-05 | 2013-11-05 | A kind of High molecular material for vibration attenuation of automobile |
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| CN103602025B true CN103602025B (en) | 2015-10-21 |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| BR9610033A (en) * | 1995-08-15 | 1999-07-06 | Exxon Chemical Patents Inc | Vibration damper and / or vulcanized insulation with high temperature stability |
| US6462131B1 (en) * | 2000-10-16 | 2002-10-08 | Exxonmobil Chemical Patents Inc. | Polymer blend compatibilization using isobutylene-based block copolymers |
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Effective date of registration: 20221209 Address after: No. 388, Weinan Road, Weitang Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215000 Patentee after: SUZHOU HENGDA PLASTIC INDUSTRIAL CO.,LTD. Address before: No. 388, Weinan Road, Weitang Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215000 Patentee before: SUZHOU WANLONG AUTO PARTS Co.,Ltd. |
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