CN103602025A - High molecular material for vibration attenuation of automobile - Google Patents
High molecular material for vibration attenuation of automobile Download PDFInfo
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- CN103602025A CN103602025A CN201310543096.1A CN201310543096A CN103602025A CN 103602025 A CN103602025 A CN 103602025A CN 201310543096 A CN201310543096 A CN 201310543096A CN 103602025 A CN103602025 A CN 103602025A
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Abstract
The invention provides a high molecular material for vibration attenuation of an automobile, wherein the high molecular material has excellent shock-resistant, vibration attenuating and damping performances, flexibility and elasticity, great deformation resistance, weather resistance, durability and small temperature dependency. The formula of the material comprises the following components in parts by weight: 25-30 parts of polystyrene-polyisobutene segmented copolymer, 35-40 parts of polystyrene-polyisobutene-polystyrene segmented copolymer, 20-25 parts of chlorinated butyl rubber and 10-15 parts of homo-polypropylene resin (the total weight of the polystyrene-polyisobutene segmented copolymer, the polystyrene-polyisobutene-polystyrene segmented copolymer, the chlorinated butyl rubber and the homo-polypropylene resin is 100 parts), 10-20 parts of inorganic filler, 0.2-0.6 parts of dicumyl peroxide, 15-20 parts of hydrogenated petroleum resin and 10-15 parts of paroline.
Description
Technical field
The present invention relates to automotive material technical field, a kind of vehicle vibration damping macromolecular material 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 become in people's daily life, work requisitely ride 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 of weighing automobile quality.And vibration and noise in car affects 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 that damping property is excellent, lightweight high molecular polymer is as the damping material of automobile.The rubber damping material for example using in tradition, there is quality light, the advantages such as shock resistance and easily 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 form is widely used in the trolley parts such as bracing or strutting arrangement of automotive suspension, yet in order to improve the extinction efficiency that improves rubber damping material, often need to add therein a large amount of carbon blacks, the mineral fillers such as silicon oxide, or rosin, petroleum resin tackiness agent, but along with improving constantly that automobile requires for vibration damping, continue to improve the content of mineral filler in rubber, the difficulty that the moulding processability that makes material is difficult to meet the demands and causes product to manufacture, add elastomeric material heat-resisting, weathering resistance is poor, harsh and unforgiving environments in the time of often can not adapting to automobile use.Heat-curable urethane foam material is also a kind of vehicle vibration damping material widely using, but the volume of foam material is often larger, need waste originally with regard to nervous motor space, and its physical property after the collision through repeatedly declines very large, directly cause damping performance significantly to reduce, in addition thermosetting material is difficult to by moulding process moulding such as injection moulding, mold pressings, and material itself is effectively recycling again, and it is the requirement of vehicle vibration damping material more and more difficult to deal with also.
Thermoplastic elastomer is a kind ofly to have 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 exist permanentset deficiency or temperature dependency large etc. not enough.
Therefore, research and develop a kind of formula of macromolecular material and complete processing adapting with it for vehicle vibration damping with excellent and stable use properties, have great importance and be worth.
Summary of the invention
Object of the present invention is to provide the formula of a kind of novel vehicle vibration damping with excellent and stable use properties with macromolecular material.
Vehicle vibration damping in the present invention is as follows with the formula of macromolecular material: in weight part, 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 ℃.
As preferably, 28 parts of polystyrene-poly isobutylene block copolymers;
As preferably, 37 parts of polystyrene-poly iso-butylene-polystyrene block copolymer;
As preferably, 22 parts of chlorinated butyl rubbers;
As preferably, 13 parts of sym-propene polymer resins;
As preferably, 16 parts of mineral fillers;
As preferably, dicumyl peroxide 0.4;
As preferably, 18 parts of hydrogenated petroleum resins;
As preferably, 12 parts of paraffin oils.
Advantage of the present invention is, reasonable design the formula of macromolecular material for vehicle vibration damping, by the interaction between each component and influence each other, obtained the vehicle vibration damping macromolecular material with excellent and stable use properties, described macromolecular material has excellent forming property, damping property and temperature dependency.
Embodiment
Below by specific embodiment, describe content of the present invention in detail.
Embodiment 1.
According to each given component proportion of table 1 prepare burden and dry to 100 ℃ standby;
Operation one: first polystyrene-poly isobutylene block copolymer, polystyrene-poly iso-butylene-polystyrene block copolymer and chlorinated butyl rubber are mixed, then add mineral filler dosage half, hydrogenated petroleum resin, paraffin oil dosage 1/3rd, then in plastics processing mill, implement melting mixing, mixing temperature is 150 ℃, and the mixing time is 3 minutes;
Operation two: add subsequently the further melting mixing of dicumyl peroxide crosslinked, the mixing time is 5 minutes;
Operation three: sym-propene polymer resin and remaining mineral filler are joined in mixing product, improve plastics processing mill temperature to 180 ℃, melting mixing, after 10 minutes, takes out the mixing product of gained;
Operation four: the mixing product of operation three is heated to 180 ℃, and hot compacting under the pressure of 6MPa, obtains the macromolecular material for Performance Detection.
Outside embodiment 2-4 and comparative example 1*-6* formula are as shown in table 1, preparation method is all identical with embodiment 1.
Table 1
1. show 1A-H and represent successively 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;
2. the calculating of equivalent shear modulus and attenuation equivalent constant is respectively:
with
k wherein
eqfor equivalent stiffness, t
rfor shearing thickness, A are that shear area, Δ W are that energy absorption energy, W are elastic deformation energy;
3. the test condition of durable time number under 20 ℃ of conditions with 300% deflection repeated deformation until can not reply original shape;
4. tension set records under condition in compression for 100 ℃ * 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 be more than 25 parts, but too much polystyrene-poly isobutylene block copolymer can have influence on other component effects, therefore should control its content below 30 parts.In addition for guaranteeing 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 surpass 150000, but consider and shape performance, should control it below 200000.
Polystyrene-poly iso-butylene-polystyrene block copolymer has material impact for the weather resistance that improves processing characteristics, elongation at break and the system of system, if its content is too low, above-mentioned effect will be difficult to bring into play, but too much proportioning can not correspondingly improve above-mentioned performance, the performance of other component effects can be affected on the contrary, therefore its content should be controlled 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 be between 50-60%, excessively too smallly all be unfavorable for that it brings into play optimum performance, the reason of while based on identical above, its number-average molecular weight should be between 150000-200000.
Chlorinated butyl rubber not only has material impact for good attenuation performance and the durable usability of system integral body, and can significantly improve weathering resistance and the ageing resistance of system, and can make system obtain very little gas-premeable, in addition can improve the recoverable of system, therefore the existence of chlorinated butyl rubber is extremely necessary, for bringing into play above effect, its content at least should be 20 parts, but excessive interpolation can affect the performance of other component effectiveness, should control it and be less than 25 parts.In addition, crosslinked for appropriateness, thereby the flexibility of guarantee system etc., should control cl content in chlorinated butyl rubber at 1.5-2%, too high content will cause crosslinked excessively and the problems such as initiator system much higher hard, processibility deterioration are too low likely crosslinked abundant not.
The interpolation of sym-propene polymer resin can be played the effect that improves tension set, but excessive interpolation not only can not continue to improve tension set, can cause on the contrary it to decline to some extent, simultaneously also be unfavorable for the performance of other component effectiveness, so in system of the present invention, to control its content be 10-15 part.
As typical mineral filler, silicon oxide can significantly improve the fade performance of system, if but its addition is too much, and not only can cause the processing characteristics of system 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, can improve better the fade performance of system, the two dispersed of the interpolation of calcium carbonate and hydrogenated petroleum resin simultaneously, performance raising system fade performance be can work in coordination with, temperature dependency and elongation at break particularly improved.But mineral filler is added, need strict control, otherwise will greatly affect elongation at break, temperature dependency and the processibility etc. of system.
Dicumyl peroxide is the most suitable for the crosslinked action in body series, its appropriate interpolation can obtain corresponding crosslinked, thereby can improve decay, the elastic performance of system under gross distortion condition, and weather resistance, its content is crossed major general and is difficult to bring into play above-mentioned performance, and its content too much not only can not be brought into play above-mentioned performance, hardness that also can excessive increase system, makes distortion difficulty and causes processibility to worsen.
Hydrogenated petroleum resin is even must be scattered in fade performance and the temperature dependency that can effectively improve system in system, has also improved to a certain extent the elongation at break of system simultaneously, and it functions as described above with calcium carbonate is collaborative to a certain extent.For bringing into play above-mentioned effect, the kind that should select softening temperature to be less than 100 ℃, and guarantee that addition is greater than 15 parts, just can make hydrogenated petroleum resin dispersed.But excessive interpolation can reduce above-mentioned performance on the contrary, not only so, also can make system too adhere, thereby worsen processibility.
Paraffin oil is conventional softening agent, its interpolation in system of the present invention can be good at playing the effect that improves weather resistance under gross distortion condition, for giving full play to above-mentioned effect, at least should guarantee that its content is more than 10 parts, but excessive be added with the risk that surplus is overflowed, thereby affect itself and other for example combination of metal products, the intensity that also can reduce system causes formability problem etc.Therefore will control it is 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 can cause the pyrolysis of polymkeric substance, and then reduce fade performance, endurance quality and tension set etc.And crosslinked time must be suitable in operation two, excessively crosslinked or crosslinked insufficient, all can affect fade performance, endurance quality and the tension set etc. of system.
Claims (6)
1. a vehicle vibration damping macromolecular material, it is characterized in that thering is following formula: in weight part, 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.
2. macromolecular material according to claim 1, is characterized in that: 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.
3. macromolecular material according to claim 1, is characterized in that: the cl content of described chlorinated butyl rubber is at 1.5-2%.
4. macromolecular material according to claim 1, it is characterized in that: described mineral filler is the mixture of silicon oxide and calcium carbonate, and the part by weight of the two is 1:1.
5. macromolecular material according to claim 1, is characterized in that: the softening temperature of described hydrogenated petroleum resin is less than 100 ℃.
6. macromolecular material according to claim 1, is characterized in that: 28 parts of polystyrene-poly isobutylene block copolymers; 37 parts of polystyrene-poly iso-butylene-polystyrene block copolymer; 22 parts of chlorinated butyl rubbers; 13 parts of sym-propene polymer resins; 16 parts of mineral fillers; Dicumyl peroxide 0.4; 18 parts of hydrogenated petroleum resins; 12 parts of paraffin oils.
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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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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196114A (en) * | 1995-08-15 | 1998-10-14 | 埃克森化学专利公司 | Vibration dampening and/or isolation vulcanizate having high temp. stability |
| CN1469900A (en) * | 2000-10-16 | 2004-01-21 | 埃克森美孚化学专利公司 | Polymer blend compatibilization using isobutylene-based block copolymers |
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- 2013-11-05 CN CN201310543096.1A patent/CN103602025B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196114A (en) * | 1995-08-15 | 1998-10-14 | 埃克森化学专利公司 | Vibration dampening and/or isolation vulcanizate having high temp. stability |
| CN1469900A (en) * | 2000-10-16 | 2004-01-21 | 埃克森美孚化学专利公司 | 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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