CN104231596A - Polyurethane elastomer material for vibration isolator and preparation method for polyurethane elastomer material - Google Patents
Polyurethane elastomer material for vibration isolator and preparation method for polyurethane elastomer material Download PDFInfo
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- CN104231596A CN104231596A CN201410506835.4A CN201410506835A CN104231596A CN 104231596 A CN104231596 A CN 104231596A CN 201410506835 A CN201410506835 A CN 201410506835A CN 104231596 A CN104231596 A CN 104231596A
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Abstract
The invention discloses a polyurethane elastomer material for a vibration isolator and a preparation method for the polyurethane elastomer material. Polyurethane raw rubber is synthesized by taking polyisocyanate and polyether polyol as reaction raw materials and taking trimethylolpropanemonoallylether or unsaturated double bond-containing micromolecular glycol of alpha-allyl glyceroether as a chain extender, and is used as a substrate material, a reinforcing filler, sulfur and an accelerator are added into a raw rubber system to obtain a polyurethane rubber compound, and the polyurethane rubber compound is die-pressed and sulfurized to obtain the low-internal friction and high-performance polyurethane elastomer material for the vibration isolator. The polyurethane elastomer material has low internal friction, excellent mechanical performance, excellent water resistance, excellent oil resistance and low damping internal friction; the invention is particularly applied to the polyurethane elastomer material for the vibration isolator; meanwhile, a preparation process is simple and feasible, and the requirements of practical engineering application on material performance can be met.
Description
[technical field]
The present invention relates to a kind of elastomer material and preparation method thereof, particularly relate to a kind of polyurethane elastomer material for vibration isolator and preparation method thereof, be specifically related to a kind of low in-fighting polyurethane elastomer material for vibration isolator and preparation method thereof.
[background technology]
Known, rubber shock absorber is a most widely used class vibration isolator, it has compact construction, good manufacturability, low cost and other advantages, can according to the structural requirement of load bearing equipment, be sulfided into arbitrary geometrical shape, general in order to adapt to applied environment, mostly adopt paracril, the natural rubber of oil resistance excellence.But along with the prolongation of rubber shock absorber duration of service, the phenomenon of material aging, performance degradation will be there is, cause the work-ing life of rubber shock absorber shorter " be only 7 ~ 10 years and just occur various forms of inefficacies etc. ", in addition, because the bin aging phenomenon of rubber shock absorber is very serious, further shorten its work-ing life, even some vibration isolator products just lost efficacy before the mounting.Rubber shock absorber, once lose efficacy, must be safeguarded timely and change, otherwise will directly affect the security of equipment.But, due to vibration isolator change time exist difficulty greatly, costly, maneuvering ability difference etc. problem.Therefore, urgently develop a kind of low in-fighting antifatigue elastomer material of the ageing-resistant performance excellence for rubber shock absorber, improve the work-ing life of rubber shock absorber.
Body of rubber material along with vibration isolator is constantly brought forth new ideas development, wherein, adopting urethanes to be material of main part is the important directions that rubber shock absorber develops, United States Navy set about development of new high-performance and strengthens polyurethane elastomer vibration isolator in 1998, its result of study shows, mechanical property is good, lightweight, size is little except having for this vibration isolator, corrosion-resistant, specified carrying wide ranges, the advantages such as natural frequency is low, also have the features such as good damping result, shock resistance be excellent.The deformability of polyurethane elastomer is natural rubber and elastomeric 2 ~ 3 times, therefore, can be used for designing the shock resistant vibration isolation device with gross distortion ability.Experiment shows, polyurethane elastomer vibration isolator is not destroyed under 200g acceleration impacts, and impact experiment result has repeatability.In addition, urethane vibration isolator also has long-lived feature, and work-ing life can reach 20 ~ 30 years.At present, the vibration shock isolation that the polyurethane elastomer vibration isolator of existing more than 60 kind of different size is used for USN's naval vessels and submarine equipment hits in device, its specified carrying scope from 0.23Kg to 4536Kg not etc.
Domestic naval engineering university adopts respectively using TDI and MDI as reaction raw materials, synthesize casting type polyurethane elastomer material and manufactured urethane vibration isolator, experimental study has been carried out to the performance of the urethane vibration isolator that it is developed, comprise the supporting capacity of urethane vibration isolator, carrying scope, springrate ratio value etc., result shows: urethane vibration isolator is larger than rubber shock absorber supporting capacity, carrying wide ranges, the little and good damping result of springrate ratio value.The impact of molecular structure composition on vibration isolator performance of this test also preliminary study polyurethane elastomer.But in the research, the synthesis material of cast polyurethane body adopts the isocyanic ester such as traditional PPO polyether glycol and TDI, MDI, and the in-fighting of material is comparatively large, and heat-dissipating is serious, cause the ageing-resistant performance of material not enough, have a strong impact on the performance of urethane vibration isolator.
Determined by the molecular structure of polyurethane elastomer, the type material damping, in-fighting heat-dissipating are comparatively large, and in all kinds of research paper, polyurethane elastomer material is generally studied as high damping body material; The improvement of the aspect such as improvement in synthesis, mechanical property of the more concern polyurethane elastomer material of current existing patent, and not yet have the patent for vibration isolator proprietary material to declare.
Though traditional polyurethane material has the excellent advantage of shock resistance, also there is the shortcoming that in-fighting heat-dissipating is larger, water-fast, oil resistance is poor, which has limited its application as vibration isolator material.So how a kind of excellent in mechanical performance is provided, in-fighting vibration isolator polyurethane elastomer material that is low, media-resistant just become the long-term technology demand of those skilled in the art.
[summary of the invention]
For overcoming the deficiency existed in background technology, the invention provides a kind of polyurethane elastomer material for vibration isolator and preparation method thereof, the present invention is by by adopting polyisocyanates and polyether glycol to be reaction raw materials, trihydroxy methyl propane mono allyl ether or glycerine α-allyl ethers is adopted to contain little point of glycol of unsaturated double-bond as chainextender synthesis of polyurethane rubber, using the rubber of synthesis as body material, by adding reinforced filling in rubber system, Sulfur and promotor, obtain urethane rubber unvulcanizate, then the low in-fighting high-performance polyurethane elastomer material of vibration isolator is obtained by molded vulcanization, the present invention has mechanical property, water-fast, oil resistance is excellent, and damping in-fighting is little, be applicable to vibration isolator material of main part, preparation technology's simple possible of the present invention simultaneously, the requirement of practical engineering application to material property can be met.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
A kind of polyurethane elastomer material for vibration isolator, described polyurethane elastomer material with aromatic polyisocyanate and polyether glycol or polyester polyol for reaction material, trihydroxy methyl propane mono allyl ether or glycerine α-allyl ethers is adopted to contain little point of glycol of unsaturated double-bond as chainextender synthesis of polyurethane rubber, using the rubber of synthesis as the body material of urethane rubber unvulcanizate, further, by adding appropriate reinforced filling in body material, vulcanizing agent and promotor, and then obtain urethane rubber unvulcanizate, the polyurethane elastomer material for vibration isolator is obtained further by molded vulcanization.
The described polyurethane elastomer material for vibration isolator, urethane rubber prepared by described synthesis, adds reinforced filling 20 ~ 50 parts, vulcanizing agent 2 ~ 5 parts, promotor 5 ~ 10 parts in the rubber of its every 100 parts of mass fractions.
The described polyurethane elastomer material for vibration isolator, described reinforced filling is any one in hard(carbon)black or semi-reinforcing hydrocarbon black or gas-phase silica.
The described polyurethane elastomer material for vibration isolator, described vulcanizing agent is powder-sulphur.
The described polyurethane elastomer material for vibration isolator, described promotor is sulphur promotor, and described sulphur promotor is vulkacit D or captax.
For a preparation method for the polyurethane elastomer material of vibration isolator, the concrete steps of described preparation method are as follows:
One, synthesis of polyurethane rubber:
First polyether glycol or polyester polyol are carried out dehydration pre-treatment, more than vacuum hydro-extraction 2h in 100 ~ 120 DEG C of vacuum drying ovens, then according to metering, the polyether glycol after dehydration or polyester polyol are joined the there-necked flask being placed in 75 ~ 115 DEG C of oil baths, logical nitrogen also adds aromatic series organic diisocyanate under stirring at low speed, increase stirring velocity, make both mix, after reaction 30 ~ 50min, add appropriate chainextender, after continuing reaction 20 ~ 30min, mixture is poured out, be positioned in 100 ~ 120 DEG C of baking ovens and heat more than 6h, obtain urethane synthesis rubber,
Two, blend glue stuff is prepared:
The urethane synthesis rubber upper step obtained mixes in mixing equipment with reinforced filling, vulcanizing agent and promotor, obtains blend glue stuff;
Three, polyurethane elastomer material is prepared:
The blend glue stuff upper step obtained heats in metal die, extrusion forming, and pressure is 8 ~ 12MPa, and temperature is 130 ~ 150 DEG C, and molding time is 25 ~ 50min, gets final product sulfidization molding, obtained polyurethane elastomer material.
The preparation method of the described polyurethane elastomer material for vibration isolator, the molecular weight of described polyether glycol is 1000 ~ 3000.
Adopt technical scheme as above, the present invention has superiority as described below:
A kind of polyurethane elastomer material for vibration isolator of the present invention and preparation method thereof, the present invention is by by adopting polyisocyanates and polyether glycol to be reaction raw materials, trihydroxy methyl propane mono allyl ether or glycerine α-allyl ethers is adopted to contain little point of glycol of unsaturated double-bond as chainextender synthesis of polyurethane rubber, using the rubber of synthesis as body material, by adding reinforced filling in rubber system, Sulfur and promotor, obtain urethane rubber unvulcanizate, then the low in-fighting high-performance polyurethane elastomer material of vibration isolator is obtained by molded vulcanization, it is low that the present invention has in-fighting, mechanical property, water-fast, oil resistance is excellent, and damping in-fighting is little, be specially adapted to vibration isolator polyurethane elastomer material, preparation technology's simple possible of the present invention simultaneously, the requirement of practical engineering application to material property can be met.
[embodiment]
Can explain the present invention in more detail by the following examples, the present invention is not limited to the following examples;
A kind of polyurethane elastomer material for vibration isolator of the present invention, described polyurethane elastomer material with aromatic polyisocyanate and the end group linear polyether polyvalent alcohol that is primary hydroxyl or polyester polyol for reaction material, trihydroxy methyl propane mono allyl ether or glycerine α-allyl ethers is adopted to contain little point of glycol of unsaturated double-bond as chainextender synthesis of polyurethane rubber, using the rubber of synthesis as the body material of urethane rubber unvulcanizate, further, by adding appropriate reinforced filling in body material, vulcanizing agent and promotor, in actual implementation process every 100 parts of mass fractions rubber in add reinforced filling 20 ~ 50 parts, vulcanizing agent 2 ~ 5 parts, promotor 5 ~ 10 parts, described reinforced filling is any one in hard(carbon)black or semi-reinforcing hydrocarbon black or gas-phase silica, described vulcanizing agent is powder-sulphur, described promotor is sulphur promotor, and described sulphur promotor is vulkacit D or captax, and then obtain urethane rubber unvulcanizate, obtain the polyurethane elastomer material for vibration isolator further by molded vulcanization.
The preparation method of a kind of polyurethane elastomer material for vibration isolator of the present invention, the concrete steps of described preparation method are as follows:
One, synthesis of polyurethane rubber:
First polyether glycol or polyester polyol are carried out dehydration pre-treatment, the molecular weight of described polyether glycol is 1000 ~ 3000, then more than vacuum hydro-extraction 2h in 100 ~ 120 DEG C of vacuum drying ovens, then according to metering, the polyether glycol after dehydration or polyester polyol are joined the there-necked flask being placed in 75 ~ 115 DEG C of oil baths, logical nitrogen also adds aromatic series organic diisocyanate under stirring at low speed, increase stirring velocity, make both mix, after reaction 30 ~ 50min, add appropriate chainextender, after continuing reaction 20 ~ 30min, mixture is poured out, be positioned in 100 ~ 120 DEG C of baking ovens and heat more than 6h, obtain urethane synthesis rubber,
Two, blend glue stuff is prepared:
The urethane synthesis rubber upper step obtained mixes in mixing equipment with reinforced filling, vulcanizing agent and promotor, obtains blend glue stuff;
Three, polyurethane elastomer material is prepared:
The blend glue stuff upper step obtained heats in metal die, extrusion forming, and pressure is 8 ~ 12MPa, and temperature is 130 ~ 150 DEG C, and molding time is 25 ~ 50min, gets final product sulfidization molding, obtained polyurethane elastomer material.
Specific embodiments of the invention are as follows:
After PTMG (PTMG) (wherein PTMG is typical a kind of in the linear polyether polyvalent alcohol of terminal hydroxy group end-blocking) is vacuumized dehydration 2h at 120 DEG C, the PTMG measured is added under nitrogen protection the there-necked flask being placed in 100 DEG C of oil baths, NDI is added under stirring at low speed, increase stirring velocity, NDI is made to mix in PTMG and react, after reaction 30min, glycerine α-the allyl ethers adding metering contains little point of glycol of unsaturated double-bond as chainextender, after continuing reaction 20min, product is poured out, the baking oven being placed in 120 DEG C processes 6h, obtain urethane synthesis rubber, then urethane rubber is weighed by proportioning, reinforced filling, sulphur, promotor, mixing on a mill until, to be mixed evenly after, slice, cut out, load mould, shaping on heat pressing forming machines.Mold temperature (upper and lower mould) is 135 DEG C, and forming pressure is 10MPa, and molding time is 40min.
Table 1 Example formulations (mass fraction)
| Starting material title | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Urethane synthesis rubber | 100 | 100 | 100 | 100 |
| Reinforced filling | 20 | 30 | 40 | 50 |
| Vulcanizing agent | 2 | 3 | 4 | 5 |
| Promotor | 10 | 5 | 6 | 7 |
The mechanical property of table 2 blending-type polyurethane elastomer material and medium-resistance
The present invention can reach following technique effect:
The polyurethane elastomer material of vibration isolator of the present invention, it is water-fast, the dielectric behavior of resistance to wet goods excellent, mechanical strength is high, dissipation factor changes less in wider range of frequency, and material in-fighting is low, damping is little (tan δ <0.2), is applicable to vibration isolator material.
Part not in the detailed description of the invention is prior art.
The embodiment selected in this article in order to open object of the present invention, currently thinks to be suitable for, but it is to be understood that the present invention is intended to comprise all changes belonging to the embodiment in this design and invention scope and improvement.
Claims (7)
1. the polyurethane elastomer material for vibration isolator, it is characterized in that: described polyurethane elastomer material with aromatic polyisocyanate and polyether glycol or polyester polyol for reaction material, trihydroxy methyl propane mono allyl ether or glycerine α-allyl ethers is adopted to contain little point of glycol of unsaturated double-bond as chainextender synthesis of polyurethane rubber, using the rubber of synthesis as the body material of urethane rubber unvulcanizate, further, by adding appropriate reinforced filling in body material, vulcanizing agent and promotor, and then obtain urethane rubber unvulcanizate, the polyurethane elastomer material for vibration isolator is obtained further by molded vulcanization.
2. according to claim 1 for the polyurethane elastomer material of vibration isolator, it is characterized in that: the urethane rubber of described synthesis preparation, in the rubber of its every 100 parts of mass fractions, add reinforced filling 20 ~ 50 parts, vulcanizing agent 2 ~ 5 parts, promotor 5 ~ 10 parts.
3. according to claim 1 for the polyurethane elastomer material of vibration isolator, it is characterized in that: described reinforced filling is any one in hard(carbon)black or semi-reinforcing hydrocarbon black or gas-phase silica.
4. according to claim 1 for the polyurethane elastomer material of vibration isolator, it is characterized in that: described vulcanizing agent is powder-sulphur.
5. according to claim 1 for the polyurethane elastomer material of vibration isolator, it is characterized in that: described promotor is sulphur promotor, described sulphur promotor is vulkacit D or captax.
6. for a preparation method for the polyurethane elastomer material of vibration isolator, it is characterized in that: the concrete steps of described preparation method are as follows:
One, synthesis of polyurethane rubber:
First polyether glycol or polyester polyol are carried out dehydration pre-treatment, more than vacuum hydro-extraction 2h in 100 ~ 120 DEG C of vacuum drying ovens, then according to metering, the polyether glycol after dehydration or polyester polyol are joined the there-necked flask being placed in 75 ~ 115 DEG C of oil baths, logical nitrogen also adds aromatic series organic diisocyanate under stirring at low speed, increase stirring velocity, make both mix, after reaction 30 ~ 50min, add appropriate chainextender, after continuing reaction 20 ~ 30min, mixture is poured out, be positioned in 100 ~ 120 DEG C of baking ovens and heat more than 6h, obtain urethane synthesis rubber,
Two, blend glue stuff is prepared:
The urethane synthesis rubber upper step obtained mixes in mixing equipment with reinforced filling, vulcanizing agent and promotor, obtains blend glue stuff;
Three, polyurethane elastomer material is prepared:
The blend glue stuff upper step obtained heats in metal die, extrusion forming, and pressure is 8 ~ 12MPa, and temperature is 130 ~ 150 DEG C, and molding time is 25 ~ 50min, gets final product sulfidization molding, obtained polyurethane elastomer material.
7. the preparation method of the polyurethane elastomer material for vibration isolator according to claim 6, is characterized in that: the molecular weight of described polyether glycol is 1000 ~ 3000.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104927347A (en) * | 2015-06-12 | 2015-09-23 | 河北省科学院能源研究所 | High-damping mixing polyurethane damping material and preparation method thereof |
| CN106432682A (en) * | 2016-09-06 | 2017-02-22 | 东莞华工佛塑新材料有限公司 | Preparation method of polyurethane raw rubber for mixed polyurethane elastomer |
| CN107868223A (en) * | 2016-11-22 | 2018-04-03 | 沈阳赛亚橡胶制品有限公司 | A kind of hydrolysis resistant polyurethane rubber and preparation method thereof |
| CN108643378A (en) * | 2018-04-28 | 2018-10-12 | 同济大学 | A kind of production method of sliding isolated bearing |
| CN111534078A (en) * | 2020-05-07 | 2020-08-14 | 北京宇航系统工程研究所 | Temperature-resistant polyurethane-based rubber and preparation method thereof |
| CN114213776A (en) * | 2021-12-31 | 2022-03-22 | 广东信力科技股份有限公司 | Elastomer material, composite vibration damping base plate thereof and preparation method of base plate |
-
2014
- 2014-09-28 CN CN201410506835.4A patent/CN104231596A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104927347A (en) * | 2015-06-12 | 2015-09-23 | 河北省科学院能源研究所 | High-damping mixing polyurethane damping material and preparation method thereof |
| CN106432682A (en) * | 2016-09-06 | 2017-02-22 | 东莞华工佛塑新材料有限公司 | Preparation method of polyurethane raw rubber for mixed polyurethane elastomer |
| CN106432682B (en) * | 2016-09-06 | 2017-12-15 | 东莞华工佛塑新材料有限公司 | A kind of preparation method of blending-type polyurethane elastomer polyurethane rubber |
| CN107868223A (en) * | 2016-11-22 | 2018-04-03 | 沈阳赛亚橡胶制品有限公司 | A kind of hydrolysis resistant polyurethane rubber and preparation method thereof |
| CN108643378A (en) * | 2018-04-28 | 2018-10-12 | 同济大学 | A kind of production method of sliding isolated bearing |
| CN111534078A (en) * | 2020-05-07 | 2020-08-14 | 北京宇航系统工程研究所 | Temperature-resistant polyurethane-based rubber and preparation method thereof |
| CN114213776A (en) * | 2021-12-31 | 2022-03-22 | 广东信力科技股份有限公司 | Elastomer material, composite vibration damping base plate thereof and preparation method of base plate |
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Application publication date: 20141224 |