CN105418875B - Polyurethane combined material applied to low resilience vibration damping cushion block and preparation method thereof - Google Patents

Polyurethane combined material applied to low resilience vibration damping cushion block and preparation method thereof Download PDF

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Publication number
CN105418875B
CN105418875B CN201511031043.7A CN201511031043A CN105418875B CN 105418875 B CN105418875 B CN 105418875B CN 201511031043 A CN201511031043 A CN 201511031043A CN 105418875 B CN105418875 B CN 105418875B
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cushion block
vibration damping
low resilience
component
damping cushion
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CN105418875A (en
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孙清峰
甘经虎
王翠
李海潮
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Shandong Inov Polyurethane Co Ltd
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Shandong Inov Polyurethane Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • C08G18/4808—Mixtures of two or more polyetherdiols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
    • C08G18/632—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/6552—Compounds of group C08G18/63
    • C08G18/6558—Compounds of group C08G18/63 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6564—Compounds of group C08G18/63 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/143—Halogen containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2101/00—Manufacture of cellular products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0041—Foam properties having specified density
    • C08G2110/0066—≥ 150kg/m3
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0083—Foam properties prepared using water as the sole blowing agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2350/00—Acoustic or vibration damping material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C08J2375/08—Polyurethanes from polyethers

Abstract

The present invention relates to a kind of polyurethane combined material applied to low resilience vibration damping cushion block and preparation method thereof, belong to polyurethane applied technical field.Polyurethane combined material of the present invention applied to low resilience vibration damping cushion block, it is made up of first component and second component, the percentage by weight of first, second component is 100:50~60, wherein first component is made up of PPG A, polymer polyatomic alcohol, crosslinking agent, chain extender, foam stabiliser, catalyst and foaming agent；Second component is made up of PPG B and isocyanates.The cushion block low resilience effect that the present invention is made using polyurethane combined material is good, and vibration absorption ability and feel are improved；Invention also provides simple and easy, energy-conserving and environment-protective preparation methods.

Description

Polyurethane combined material applied to low resilience vibration damping cushion block and preparation method thereof
Technical field
The present invention relates to a kind of polyurethane combined material applied to low resilience vibration damping cushion block and preparation method thereof, belong to poly- ammonia Ester applied technical field.
Background technology
With the development of modern industry, the high-power machinery of vibratory tool and generation judder is on the increase, various machines The hazard of vibration that tool equipment is brought in operating and the course of work also getting worse.The broadband that vibration and grass come swashs at random More resonance peak responses of structure can be caused by shaking, and directly affect the normal work of electronic device, instrument and instrument.
The application of vibration damping cushion block mainly utilizes the distinctive viscoplasticity of high polymer material, and in vibration processes, kinetic energy is turned Heat energy is turned to, so as to reach the purpose for reducing amplitude.Because polyurethane has substantial amounts of hydrogen bond, a certain degree of microfacies point in itself There is obvious advantage to reaching this purpose from structure, polyurethane material has obtained extensive research and application.
A kind of shock-absorbing slow-elastic rubber is described in patent CN201410292011.1, rubber is mixed by adding PVC Banburying generation organic foam material is closed, the organic foam material has good low resilience and shock-absorbing performance.The method is to rubber A kind of improvement of glue, but manufacturing process is complex, and energy consumption is higher.
A kind of preparation method of vibration-damping sheet is described in patent CN201380012491.5, its Main Components contains rubber Damping layers more than 100 mass parts and the mass parts of carbon black 30.Made vibration-damping sheet density and hardness adjusting range is narrower, outward appearance Color is single.
The content of the invention
It is an object of the invention to provide a kind of polyurethane combined material applied to low resilience vibration damping cushion block, by the pad of its making Block low resilience effect is good, and vibration absorption ability and feel are improved；Invention also provides simple and easy, energy-conserving and environment-protective preparations Method.
Polyurethane combined material of the present invention applied to low resilience vibration damping cushion block, it is made up of first component and second component, The percentage by weight of first, second component is 100:50~60, wherein：
(1) first component is made up of the raw material of following weight percentage：
(2) second component is made up of the raw material of following weight percentage：
PPG B 10~20%
Isocyanates 80~90%；
The PPG A is common polyether polyalcohol and the mixture of slow-rebound polyether polyol, and common polyether is more First alcohol be degree of functionality be 2-3, number-average molecular weight is 400-2000 and the mixture of 4000-8000 PPG, preferably EP- 3600th, ED-28, DL-400 (Shandong Lanxing Dongda Chemical Co., Ltd)；The degree of functionality of slow-rebound polyether polyol is 3- 4, number-average molecular weight 500-2000, preferably degree of functionality are 3, SR-308 that number-average molecular weight is 500-1000 (can Leah it is polynary Alcohol Co., Ltd).
The polymer polyatomic alcohol is the PPG that styrene-acrylonitrile is modified, and (Jiangsu length is magnificent by preferably CHP-H45 Polyurethane Science and Technology Ltd.).
The crosslinking agent is the one or more in diethanol amine, triethanolamine, glycerine or trimethylolpropane, is preferably Glycerine or diethanol amine.
The chain extender is the one or more in butanediol, ethylene glycol or diethylene glycol, preferably diethylene glycol.
The foam stabiliser is organosilyl surface activator, preferably DC193 (commercially available prod) or Shanghai dolantin generation wound The AK-7703 (commercially available prod) of Co., Ltd
The catalyst is triethylenediamine (A-33), delay equilibrium catalyst (C-225), double (dimethylaminoethyls) One or more in ether or dibutyl tin laurate.
The foaming agent is water or dichloro one fluoroethane, preferably dichloro one fluoroethane (HCFC-141B).
The PPG B is polyether polyol with high activity, content >=75% of its primary hydroxyl, degree of functionality 2-3, is counted Average molecular weight is 5000-6000.
The isocyanates is the mixture of methyl diphenylene diisocyanate and polyphenyl polymethylene polyisocyanates.
The methyl diphenylene diisocyanate is 4,4- methyl diphenylene diisocyanates and 2,4- diphenyl methane two The mixture of isocyanates, mixing quality ratio are 50-60:40-50.
Methyl diphenylene diisocyanate be preferably MDI-100 (it is commercially available, 4,4- methyl diphenylene diisocyanates 99% with On, Yantai Wanhua Polyurethane Co., Ltd), MDI-50 (commercially available, 4,4- methyl diphenylene diisocyanates and 2,4- hexichol The mixture of dicyclohexylmethane diisocyanate, Yantai Wanhua Polyurethane Co., Ltd) or 44C (commercially available, Bayer A.G) In one or more；The mixture of polyphenyl polymethylene polyisocyanates is preferably PM200 (commercially available, the poly- ammonia of Yantai Wanhua Ester limited company) or M20S (commercially available, Shanghai BASF Co., Ltd).
The preparation method of the described polyurethane combined material applied to low resilience vibration damping cushion block, comprises the following steps：
(1) first component is prepared：By PPG A, polymer polyatomic alcohol, crosslinking agent, chain extender, foam stabiliser, urge 20~30min is stirred in agent and foaming agent input reactor, discharges and is sealed；
(2) second component is prepared：PPG B is put into reactor, stirs and is warming up to 100-120 DEG C, then Vacuum is adjusted, 1h is dehydrated, is cooled to 30-40 DEG C, is eventually adding isocyanates, is warming up to 60-70 DEG C, after being incubated 30-40min 40-50 DEG C is cooled to, discharges and is sealed；
(3) in use, first, second component is mixed according to corresponding proportion, that is, it is made applied to the poly- of low resilience vibration damping cushion block Urethane combination material.
The low resilience vibration damping cushion block made using the combination material, its density is 0.3-0.9g/cm3, hardness 30A- 70A, have appropriate low resilience effect and preferably it is damping.
Made cushion block, which can be applicable to precision instrument, to be needed to make component or the instrument bottom of vibration damping processing, to reduce vibration It can ensure instrument normal use with noise.
The invention has the advantages that：
(1) the low resilience vibration damping cushion block made using the combination material, is possessed low resilience effect, substantially increases its absorbing Ability and feel；
(2) the low resilience vibration damping cushion block made using the combination material, density 0.3-0.9g/cm3, hardness 30A- The whole scope of 70A, Color tunable is big, can add the mill base of different colours as requested, meets the individual demand of application；
(3) preparation method of the polyurethane combined material applied to low resilience vibration damping cushion block described in, not only energy-conserving and environment-protective, and And it is simple and easy, it is once i.e. plastic, it is not necessary to which that the later stage vulcanizes.
Embodiment
With reference to embodiment, the present invention is further illustrated, but it is not intended to limit the implementation of the present invention.
Embodiment 1
(1) first component is prepared：Weighing PPG A respectively, (EP-330NG, the big chemical industry Limited Liability in Shandong blue star east are public Department) 50kg, (SR-308, can Leah polyalcohol Co., Ltd) 40kg, CHP-H45 (Jiangsu Changhua Polyurethane Technology Co., Ltd.) 10kg.Ethylene glycol 6kg, organosilyl surface activator DC193 (gas chemical products Co., Ltd of the U.S.) 0.5kg, AK-7703 (gas chemical products Co., Ltd of the U.S.) 0.5kg, tertiary amine catalyst A-33 and deferred class catalyst C-225 are respectively 1.5kg and 1.5kg, is placed in reactor and stirs 20min, after being well mixed, discharging, is sealed.
(2) second component is prepared：Weigh PPG B (EP3600, Shandong Lanxing Dongda Chemical Co., Ltd) 10kg, temperature are maintained at 50-60 DEG C of addition, MDI-50 (commercially available, Yantai Wanhua Polyurethane Co., Ltd) 50kg, MDI- 100 (commercially available, Yantai Wanhua Polyurethane Co., Ltd) 10kg, M20S (commercially available, Shanghai BASF Co., Ltd) 30kg, delay It is slow to be warming up to 75 DEG C, insulation reaction 50 minutes, sampling detection ,-NCO mass content 28.76%, 40 DEG C of dischargings are cooled to, it is close Envelope preserves.
(3) in use, by first, second component according to weight than 10:60 mixing, that is, it is made applied to low resilience vibration damping cushion block Polyurethane combined material.
Embodiment 2
(1) first component is prepared：PPG A (ED-28, Shandong Lanxing Dongda Chemical Co., Ltd) is weighed respectively 55kg, (SR-308, can Leah polyalcohol Co., Ltd) 20kg, (DL-400, Shandong Lanxing Dongda Chemical Co., Ltd) 20kg, diethylene glycol 6kg, organosilyl surface activator AK-7703 (gas chemical products Co., Ltd of the U.S.) 0.5kg, tertiary amine Class catalyst A-33 and deferred class catalyst C-225 is respectively 1kg and 1kg, blowing agent H CFC-141B 2kg, is placed in reactor Middle stirring 30min, after being well mixed, discharging, it is sealed.
(2) second component is prepared：PPG B (ED28, Shandong Lanxing Dongda Chemical Co., Ltd) 15kg is weighed, Temperature is maintained at 50-60 DEG C of addition, MDI-50 (commercially available, Yantai Wanhua Polyurethane Co., Ltd) 60kg, PM200 (it is commercially available, Wan Hua Chemical Co., Ltd.s) 25kg, 70 DEG C are to slowly warm up to, insulation reaction 40 minutes, sampling detects ,-NCO mass content 27.5% ± 0.2,40 DEG C of dischargings are cooled to, are sealed.
(3) in use, by first, second component according to weight than 10:55 mixing, that is, it is made applied to low resilience vibration damping cushion block Polyurethane combined material.
Embodiment 3
(1) first component is prepared：PPG A (ED-28, Shandong Lanxing Dongda Chemical Co., Ltd) is weighed respectively 45kg, (SR-308, can Leah polyalcohol Co., Ltd 25kg, CHP-H45 (Jiangsu Changhua Polyurethane Technology Co., Ltd.) 10kg, glycerine 3kg, (U.S.'s gas chemical industry produces organosilyl surface activator (gas chemical products Co., Ltd of the U.S.) AK-7703 Product Co., Ltd) 1kg, tertiary amine catalyst A-33 and deferred class catalyst C-225 be respectively 1.5kg and 1.5kg, foaming agent water 5kg, it is placed in reactor and stirs 25min, after being well mixed, discharging, is sealed.
(2) second component is prepared：Weigh PPG B (ED-28, Shandong Lanxing Dongda Chemical Co., Ltd) 20kg, temperature are maintained at 50-60 DEG C of addition, MDI-50 (commercially available, Yantai Wanhua Polyurethane Co., Ltd) 50kg, M20S (commercially available, Shanghai BASF Co., Ltd) 30kg, 75 DEG C are to slowly warm up to, insulation reaction 60 minutes, sampling detects ,-NCO matter Content 25.6% ± 0.2 is measured, 40 DEG C of dischargings is cooled to, is sealed.
(3) in use, by first, second component according to weight than 10:50 mixing, that is, it is made applied to low resilience vibration damping cushion block Polyurethane combined material.
The low resilience vibration damping cushion block that table 1 is prepared using the polyurethane combined material obtained by embodiment 1-3
Project Embodiment 1 Embodiment 2 Embodiment 3 Natural rubber
Density (g/cm3) 0.9 0.4 0.3 0.95
Hardness (A) 70 50 30 70
Rebound degree (- 10 DEG C) 5% 4% 3.5% 90%
Rebound degree (50 DEG C) 3% 2.5% 2% 85%
Remarks：
(1) size of rebound degree cushion block is detected in table：20mm×10mm×2mm；
(2) hardness test selection Shore durometer；
(3) rebound degree selection rubber resilience analyzer (High Speed Rail Testing Instruments Co., Ltd, model：GT-7042-RE, sequence Number：2010-01383).
Embodiment 1 does not foam, embodiment 2 and 3 foaming but density difference, so as to big, the different density of adjustable range Corresponding different hardness, 3 embodiments have adjusted different hardness.

Claims (9)

  1. A kind of 1. polyurethane combined material applied to low resilience vibration damping cushion block, it is characterised in that：It is made up of first component and second component, The percentage by weight of first, second component is 100:50~60, wherein：
    (1) first component is made up of the raw material of following weight percentage：
    (2) second component is made up of the raw material of following weight percentage：
    PPG B 10~20%
    Isocyanates 80~90%；
    The PPG A is the mixture of common polyether polyalcohol and slow-rebound polyether polyol, common polyether polyalcohol For degree of functionality be 2-3, number-average molecular weight is 400-2000 and the mixture of 4000-8000 PPG；Slow rebound polyether The degree of functionality of polyalcohol is 3-4, number-average molecular weight 500-2000；
    The PPG B is polyether polyol with high activity, content >=75% of its primary hydroxyl, degree of functionality 2-3, counts and divides equally Son amount is 3000-6000.
  2. 2. the polyurethane combined material according to claim 1 applied to low resilience vibration damping cushion block, it is characterised in that：Polymer Polyalcohol is the PPG that styrene-acrylonitrile is modified.
  3. 3. the polyurethane combined material according to claim 1 applied to low resilience vibration damping cushion block, it is characterised in that：Crosslinking agent For the one or more in diethanol amine, triethanolamine, glycerine or trimethylolpropane.
  4. 4. the polyurethane combined material according to claim 1 applied to low resilience vibration damping cushion block, it is characterised in that：Chain extender For the one or more in butanediol, ethylene glycol or diethylene glycol.
  5. 5. the polyurethane combined material according to claim 1 applied to low resilience vibration damping cushion block, it is characterised in that：Catalyst For one kind in triethylenediamine, delay equilibrium catalyst, double (dimethylaminoethyl) ethers or dibutyl tin laurate or It is a variety of.
  6. 6. the polyurethane combined material according to claim 1 applied to low resilience vibration damping cushion block, it is characterised in that：Foaming agent For water or dichloro one fluoroethane.
  7. 7. the polyurethane combined material according to claim 1 applied to low resilience vibration damping cushion block, it is characterised in that：Isocyanic acid Ester is the mixture of methyl diphenylene diisocyanate and polyphenyl polymethylene polyisocyanates.
  8. 8. the polyurethane combined material according to claim 7 applied to low resilience vibration damping cushion block, it is characterised in that：Diphenyl Methane diisocyanate is the mixture of 4,4- methyl diphenylene diisocyanates and 2,4- methyl diphenylene diisocyanate, is mixed Conjunction mass ratio is 50-60:40-50.
  9. 9. a kind of preparation method of any described polyurethane combined materials applied to low resilience vibration damping cushion block of claim 1-8, It is characterized in that comprise the following steps：
    (1) first component is prepared：By PPG A, polymer polyatomic alcohol, crosslinking agent, chain extender, foam stabiliser, catalyst Put into foaming agent and 20~30min is stirred in reactor, discharged and be sealed；
    (2) second component is prepared：PPG B is put into reactor, stirs and is warming up to 100-120 DEG C, then adjust Vacuum, 1h is dehydrated, 30-40 DEG C is cooled to, is eventually adding isocyanates, be warming up to 70-75 DEG C, cooled after being incubated 40-60min To 40-50 DEG C, discharge and be sealed；
    (3) in use, first, second component is mixed according to corresponding proportion, that is, the polyurethane applied to low resilience vibration damping cushion block is made Combination material.
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CN107325247A (en) * 2017-07-04 2017-11-07 扬中市天正合成材料研究中心 A kind of secondary battery jar assembly polyurethane rings environment friendly flame-retardant expanded material and preparation method
CN107987240B (en) * 2017-12-14 2021-08-06 山东一诺威体育产业有限公司 Polyurethane composition for protective clothing and preparation method thereof
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