CN109824847A - A kind of polyurethane-urea vibration reduction and cushioning flexibility damping material and preparation method thereof - Google Patents
A kind of polyurethane-urea vibration reduction and cushioning flexibility damping material and preparation method thereof Download PDFInfo
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- CN109824847A CN109824847A CN201711180740.8A CN201711180740A CN109824847A CN 109824847 A CN109824847 A CN 109824847A CN 201711180740 A CN201711180740 A CN 201711180740A CN 109824847 A CN109824847 A CN 109824847A
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Abstract
The present invention provides a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material, the weight contents of the component and each component that include are as follows: 35~55 parts of isocyanate prepolymer, 30~50 parts of polyether polyol, 5~15 parts of polyaspartic ester, 1~5 part of small molecule bulky amine, 3~15 parts of filler, 1~3 part of mill base, 0.1~2 part of catalyst.The flexibility damping material is by designing small molecule bulky amine described in suitable isocyanate index and addition to control urethane crosslinks network density degree, and add the amine chainextender of steric hindrance containing side chain polyaspartic ester, so that containing the suspended chain for not thering is physical crosslinking to act on adjacent molecule chain in polyurethane molecular, improve microphase separation degree, be conducive to improve material damping value, efficiently solve the problems, such as the flexible anti-vibration of material.
Description
Technical field
The present invention relates to rail traffic damping material, in particular to a kind of damp type polyurethane-urea vibration reduction and cushioning
The preparation method of flexible material.
Background technique
With greatly developing for China's Urbanization Construction and rail traffic, alleviate China key city traffic anxiety situation.
Urban track traffic compared with other vehicles, have quick, freight volume is big, safety, on schedule, the advantages such as reliably, solve
Urban traffic blocking problem promotes also to produce while economic sustained and rapid development so greatly the people is facilitated to go on a journey
Significant social benefit.However, vibration and noise problem that urban track traffic generates can not be ignored.Urban transportation track is especially
It is underground railway track, inevitably passes through under dense population areas and important building, the vibration and noise that when train driving generates
The normal work and life of people is seriously affected.Therefore try vibration and the noise of reduction city rail, it is universal at people
The problem of concern.Therefore to the vibration damping of track, noise reduction can more stringent requirements are proposed.
Polymer damping material can rely on the phase of self structure molecule segment as a kind of important damping elastomer body material
Interaction, which gives the amplitude of receiving when being transferred to cushion blocking surface, to be weakened, thus the effect of playing vibration and noise reducing.At present I
State mostly uses rubber as damping material in field of track traffic, but there are certain defects, such as weathering characteristics for rubber material
Relatively poor, under the action of the factors such as heat, oxygen, ultraviolet light and rainwater, the service life of rubber material be will be greatly reduced, simultaneously
Under high frequency local function, the ageing process of material is accelerated, leads to material premature failure, is usually expressed as rubber stickness.Material
The failure of material will result directly in the variation of damping material Static stiffness, and universal law is that the rigidity value of rubber material increases (material before this
Expect ageing hardening), gradually decayed again later.Polyurethane elastomer is the block copolymer containing hard section and polyester soft segment；Wherein
Polyester soft segment and uncrystallized polyurethane segment form amorphous phase, and hard section partially crystallizable forms crystalline domains, play physical crosslinking
The effect of point.Polyurethane elastomer has the elasticity of rubber and the intensity of engineering plastics, and soft segment assigns its elasticity, makes it as rubber
Glue；Hard section assigns its processing performance, makes it as plastics.With rubber phase ratio, it has better processing performance, flexibility, dynamic
Mechanical property and longer service life.
Summary of the invention
Based on the problems of above-mentioned technology, the embodiment of the present invention provides a kind of polyurethane-urea vibration reduction and cushioning flexibility resistance
The problems such as preparation method of damping material, high-damping, buffering energy-absorbing and flexible anti-vibration to solve polyurethane elastomer.
The purpose of the present invention is achieved by the following technical programs:
A kind of polyurethane-urea vibration reduction and cushioning flexibility damping material provided by the invention forms are as follows: different according to its raw material of mass fraction
35~55 parts of cyanate prepolymer, 30~50 parts of polyether polyol, 5~15 parts of polyaspartic ester, small molecule bulky amine 1~
5 parts, 3~15 parts of filler, 1~3 part of mill base, 0.1~2 part of catalyst.
Further, isocyanate prepolymer of the present invention is by methyl diphenylene diisocyanate and polyethers ternary
What alcohol polycondensation reaction obtained has the prepolymer of certain degree of branching, NCO content 8%-15%；Polyether polyol is number-average molecular weight
For the polyoxypropyleneglycol of 1000-5000；Polyaspartic ester is that number-average molecular weight is 300-1000.
The isocyanate index of the polyurethane-urea vibration reduction and cushioning flexibility damping material is between 0.9~1.15.
Small molecule bulky amine of the present invention is n-butylamine, di-n-butylamine, n-octyl amine, octodrine, two octodrines, laurel
One of amine or octadecylamine are a variety of.
Catalyst of the present invention is one of stannous octoate, dibutyl tin dilaurate, organo-bismuth or organic zinc
Or it is a variety of.
Filler of the present invention is calcium carbonate, titanium dioxide, talcum powder, mica powder, barite, silica flour or graphite powder
One or more of is one or more.
Mill base of the present invention is one of black wash, white slurry, red slurry, yellow slurry, green slurry, blue slurry or a variety of.
The preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material of the present invention: by polyether polyol, poly- Tianmen
After aspartic acid ester, filler, mill base are uniformly mixed in proportion, vacuum dehydration 1-3h, is cooled to 60 under the conditions of 100-110 DEG C
DEG C or less small molecule bulky amine and catalyst is added, stir evenly.It is 0.9~1.15 addition isocyanide according to isocyanate index ratio
Polyurethane-urea vibration reduction and cushioning flexibility damping material can be obtained in acid esters prepolymer, after mixing evenly, room temperature curing.
The preparation principle of the vibration reduction and cushioning flexibility damping material are as follows: there is soft segments and hard section phase for polyurethane elastomer material
Area is a kind of heterogeneous system in itself, and by adjusting the ratio of soft and hard segments, the damping shock absorption material of different temperature ranges can be obtained.Commonly
Polyurethane material be generally unable to reach the damping requirements of wider temperature range and broad spectrum.To improve flexible damping and absorbing
Can, the present invention is by designing suitable isocyanate index and adding the small molecule bulky amine to control polyurethane network
Network density degree, and add the amine chainextender of steric hindrance containing side chain polyaspartic ester so that in polyurethane molecular contain not with phase
The suspended chain that adjacent strand has physical crosslinking to act on improves microphase separation degree, is conducive to improve higher than glass transition temperature one
Determine the damping value in region.
The invention has the advantages that 1) large arch dam does not when in use cause damages to environment without organic solvent；2) it uses
Common casting curing process or manual brushing technique, can be fully cured at room temperature, convenient and efficient；3) with wider temperature range
Damping capacity can keep good high damping under extraneous different temperatures environment.
Specific embodiment
Embodiment 1:
Isocyanate prepolymer is methyl diphenylene diisocyanate and polyether-tribasic alcohol (6000,3 function of number-average molecular weight
Degree) polycondensation reaction obtains, NCO content 12.4%.
By polyether polyol (4000,2 degree of functionality of number-average molecular weight) 25.2kg, polyaspartic ester (the equal molecule of number
Amount is 590,2 degrees of functionality) after 9.8kg, calcium carbonate 14.0kg, mill base 1.5kg be uniformly mixed in proportion, in 105 DEG C of conditions
Lower vacuum dehydration 2h is cooled to 60 DEG C or less addition di-n-butylamine 1.2kg and organic bismuth catalyst 0.3kg, stirs evenly.It is added
Polyurethane-urea vibration reduction and cushioning flexibility damping material can be obtained in isocyanate prepolymer 48.0kg, after mixing evenly, room temperature curing
Material.
Embodiment 2:
Isocyanate prepolymer is methyl diphenylene diisocyanate and polyether-tribasic alcohol (5000,3 function of number-average molecular weight
Degree) polycondensation reaction obtains, NCO content 14.9%.
By polyether polyol (3600,2 degree of functionality of number-average molecular weight) 29.5kg, polyaspartic ester (the equal molecule of number
Amount is 660,2 degrees of functionality) after 12.0kg, talcum powder 10.0kg, mill base 1.5kg be uniformly mixed in proportion, in 110 DEG C of conditions
Lower vacuum dehydration 1.5h is cooled to 60 DEG C or less addition two octodrine 1.5kg and stannous octoate catalyst 0.5kg, stirs evenly.
Isocyanate prepolymer 45.0kg is added, after mixing evenly, the damping of polyurethane-urea vibration reduction and cushioning flexibility can be obtained in room temperature curing
Material.
Embodiment 3:
Isocyanate prepolymer is methyl diphenylene diisocyanate and polyether-tribasic alcohol (3000,3 function of number-average molecular weight
Degree) polycondensation reaction obtains, NCO content 10.2%.
By polyether polyol (2000,2 degree of functionality of number-average molecular weight) 34.5kg, polyaspartic ester (the equal molecule of number
Amount is 460,2 degrees of functionality) after 8.2kg, mica powder 5.0kg, mill base 1.0kg be uniformly mixed in proportion, under the conditions of 110 DEG C
Vacuum dehydration 1.5h is cooled to 60 DEG C or less addition n-octyl amine 0.8kg and organozinc catalyst 0.5kg, stirs evenly.It is added different
Polyurethane-urea vibration reduction and cushioning flexibility damping material can be obtained in cyanate prepolymer 50.0kg, after mixing evenly, room temperature curing.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material, which is characterized in that including following mass parts
Raw material:
35~55 parts of isocyanate prepolymer
30~50 parts of polyether polyol
5~15 parts of polyaspartic ester
1~5 part of small molecule bulky amine
3~15 parts of filler
1~3 part of mill base
0.1~2 part of catalyst
Wherein: isocyanate prepolymer is that have one by what methyl diphenylene diisocyanate and polyether-tribasic alcohol polycondensation reaction obtained
Determine the prepolymer of the degree of branching, NCO content 8%-15%；Polyether polyol is the polyoxygenated that number-average molecular weight is 1000-5000
Propylene glycol；Polyaspartic ester is that number-average molecular weight is 300-1000；Isocyanate index is between 0.9~1.15.
2. a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material according to claim 1, feature exist
In the small molecule bulky amine is n-butylamine, di-n-butylamine, n-octyl amine, octodrine, two octodrines, lauryl amine or octadecyl
One of amine is a variety of.
3. a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material according to claim 1, feature exist
In the catalyst is one of stannous octoate, dibutyl tin dilaurate, organo-bismuth or organic zinc or a variety of.
4. a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material according to claim 1, feature exist
In the filler is the one or more of of calcium carbonate, titanium dioxide, talcum powder, mica powder, barite, silica flour or graphite powder
It is one or more.
5. a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material according to claim 1, feature exist
In after polyether polyol, polyaspartic ester, filler, mill base are uniformly mixed in proportion, under the conditions of 100-110 DEG C
Vacuum dehydration 1-3h is cooled to 60 DEG C or less addition small molecule bulky amines and catalyst, stirs evenly；According to isocyanate index
Than isocyanate prepolymer is added for 0.9~1.15, after mixing evenly, polyurethane-urea vibration reduction and cushioning is can be obtained in room temperature curing
Flexible damping material.
6. a kind of preparation method of polyurethane-urea vibration reduction and cushioning flexibility damping material according to claim 1, feature exist
In the polyurethane-urea vibration reduction and cushioning flexibility damping material can be applied in rail traffic damping vibration attenuation engineering.
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| CN110229305A (en) * | 2019-06-27 | 2019-09-13 | 青岛爱尔家佳新材料股份有限公司 | A kind of explosion-proof polyurea materials and preparation method thereof |
| CN112239597A (en) * | 2019-07-19 | 2021-01-19 | 施建辉 | Flexible noise reduction pad for dice shaking device of automatic mahjong table |
| CN113831492A (en) * | 2021-09-18 | 2021-12-24 | 北京九州一轨环境科技股份有限公司 | Preparation method of polyurethane elastomer for steel rail energy dissipation part, polyurethane elastomer and energy dissipation part |
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| CN112239597A (en) * | 2019-07-19 | 2021-01-19 | 施建辉 | Flexible noise reduction pad for dice shaking device of automatic mahjong table |
| CN113831492A (en) * | 2021-09-18 | 2021-12-24 | 北京九州一轨环境科技股份有限公司 | Preparation method of polyurethane elastomer for steel rail energy dissipation part, polyurethane elastomer and energy dissipation part |
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Application publication date: 20190531 |