High energy damping elastomer and synthesis method thereof

A high energy damping elastomer, synthesized with precise ratios and processes, addresses the damping capacity limitations of existing systems, offering three times more damping capacity and improved structural protection.

WO2025248278A1PCT designated stage Publication Date: 2025-12-04SALEHI AMIRKEYVAN +1
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Patent Information

Application Number
PCT/IB2024/055139
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-05-27
Publication Date
2025-12-04

AI Technical Summary

Technical Problem

Existing energy damping systems, particularly viscoelastic dampers, lack sufficient damping capacity, which affects their applicability and cost-effectiveness in structures and buildings.

Method used

A high energy damping elastomer composed of specific ratios of polyether diol, diisocyanate, triol, diamine, and gelation catalyst, synthesized through a controlled mixing and curing process, achieving a damping capacity three times greater than conventional elastomers.

Benefits of technology

The high energy damping elastomer provides enhanced damping capacity, reducing unwanted vibrations and structural damage by dissipating energy effectively, thereby improving the efficiency and cost-effectiveness of energy damping systems.

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Abstract

A high energy damping elastomer for producing an energy damping system and a synthesis method thereof has been developed. The high energy damping elastomer comprises a polyether diol, a diisocynates, a triol, a diamine, and a gelation catalyst such that a mass ratio of the polyether diol to a diisocynate and a mass ratio of the triol: the gelation catalyst: diamine are adjusted in 1:144 and 5:2:1, respectively. The high energy damping elastomer indicates a three times more damping capacity compared to a common elastomer when applied in the energy damping system in a same consumption volume as well as a damping factor of more than one in a temperature range of 15 °C to 50 °C.
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Description

HIGH ENERGY DAMPING ELASTOMER AND SYNTHESIS METHOD THEREOFTECHNICAL FIELD

[0001] The present disclosure is generally related to an exemplary high energy damping elastomer and a synthesis method thereof, and more particularly to an exemplary high energy damping elastomer with a three times more damping capacity compared to a common damping elastomer used in an energy damping system.BACKGROUND

[0002] In recent years, due to the destructive effects of earthquakes on structures and buildings, various methods have been used to strengthen structures and buildings and reduce the damage caused to them. One of these methods is the use of an energy damping system, which can be paying attention to the hardness of the system increases the energy dissipation capability of the complex to a large extent. One type of the energy damping system is a viscoelastic dissipation system that also known as a viscoelastic damper. The viscoelastic damper, which is a passive system, is the most used due to a type of its operation. In this type of damper, the damper operate due to a movement caused by the earthquake and does not require any external energy.

[0003] In this type of energy damping system, an amount of energy consumption capacity called a damping capacity is the most important and valuable factor. As a damping capacity increase, the viscoelastic damper will be indicated more applicability as well as can affect the final price of the viscoelastic damper and the structures and buildings. Thus, there is need to develop a new high energy damping elastomer and a synthesis method thereof for producing the elastomer that can be used for fabricating a cost-effective energy damping system. .SUMMARY

[0004] This summary is intended to provide an overview of the subject matter of the present disclosure, and is not intended to identify essential elements or key elements of thesubject matter, nor is it intended to be used to determine the scope of the claimed implementations. Its sole purpose is to present some concepts of one or more exemplary aspects in a simplified form as a prelude to the more detailed description that is presented later. The proper scope of the present disclosure may be ascertained from the claims set forth below in view of the detailed description below and the drawings.

[0005] One or more exemplary embodiments describe an exemplary high energy damping elastomer. The exemplary high energy damping may comprise an exemplary polyether diol, an exemplary diisocyanate, an exemplary triol, an exemplary gelation catalyst, and an exemplary diamine.

[0006] In an exemplary embodiment, an exemplary mass ratio of an exemplary poly ether diol to an exemplary diisocyanate may be 1:1.44. In an exemplary embodiment, an exemplary mass ratio of an exemplary triol: an exemplary diamine: an exemplary gelation catalyst may be 5: 1 :2. In an exemplary embodiment, an exemplary polyether diol may be polytetramethylene ether glycol (PTMEG). In some exemplary embodiments, an exemplary poly ether diol may be selected from a group of polytetramethylene ether glycol, polypropylene glycol with a low average molecular weight (PPG), or a mixture thereof. In an exemplary embodiment, an exemplary diisocyanate may be methylene diphenyl diisocyanate (MDI). In some exemplary embodiments, an exemplary diisocyanate may be selected from a group of toluene diisocyanate (TDI), methylene diphenyl diisocyanate (MDI), 1,5 -naphthalene diisocyanate (NDI), or a mixture of at least two thereof. In an exemplary embodiment, an exemplary triol may be trimethylolpropane (TMP).In an exemplary embodiment, an exemplary diamine may be 4, 4 diaminodiphenylmethane. In some exemplary embodiments, an exemplary diamine may be selected from a group of 4, 4 diaminodiphenylmethane, 2-methyl-4,6-bis(methylthio)benzene- 1,3-diamine, or a mixture thereof. In an exemplary embodiment, an exemplary gelation catalyst may be l,4-diazabicyclo[2.2.2]octane. In an exemplary embodiment, an exemplary maximumenergy damping of an exemplary high energy damping elastomer may be occurred in a high- damping elastomer glass transition region in a range of -2 °C to 50 °C. In an exemplary embodiment, an exemplary damping factor of an exemplary high-damping elastomer is more than one in a temperature range of 15 °C to 50 °C. In an exemplary embodiment, a damping capacity of an exemplary energy damping system produced by an exemplary high energy damping elastomer is three times more than a an energy damping system produced by a common elastomer in a same consumption volume.

[0007] One or more exemplary embodiments describe an exemplary synthesis method for fabricating an exemplary high energy damping elastomer. Exemplary method may comprise making an exemplary first mixture by mixing an exemplary polyether diol and an exemplary diisocyanate, preparing an exemplary second mixture by mixing an exemplary triol, an exemplary gelation catalyst, and an exemplary diamine, obtaining an exemplary third mixture by adding the exemplary first mixture to the exemplary second mixture in a predetermined time, and producing an exemplary high energy damping elastomer by curing the exemplary third mixture in a first temperature for a first curing time and in a second temperature for a second curing time.

[0008] This Summary may introduce a number of concepts in a simplified format; the concepts are further disclosed within the “Detailed Description” section. This Summary is not intended to configure essential / key features of the claimed subject matter, nor is intended to limit the scope of the claimed subject matter.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The novel features which are believed to be characteristic of the present disclosure, as to its structure, organization, use and method of operation, together with further objectives and advantages thereof, will be better understood from the following drawings in which an exemplary embodiment will now be illustrated by way of example. It is expressly understood,however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the present disclosure. Exemplary embodiments will now be described by way of example in association with the accompanying drawings in which:

[0010] FIG. 1A illustrates flowchart of an exemplary synthesis method for producing an exemplary high energy damping elastomer, consistent with one or more exemplary embodiments of the present disclosure;

[0011] FIG. IB illustrates a flowchart of an exemplary method for obtaining an exemplary first mixture for producing an exemplary high energy damping elastomer, consistent with one or more exemplary embodiments of the present disclosure;

[0012] FIG. 1C illustrates a flowchart of an exemplary method for preparing an exemplary second mixture for producing an exemplary high energy damping elastomer, consistent with one or more exemplary embodiments of the present disclosure;

[0013] FIG. 2 illustrates an image of an exemplary synthesized high energy damping elastomer, consistent with one or more exemplary embodiments of the present disclosure; and

[0014] FIG. 3 illustrates a dynamic mechanical analysis (DMA) thermographs of an exemplary high energy damping elastomer for investigating viscoelastic properties of an exemplary high energy damping elastomer, consistent with one or more exemplary embodiments of the present disclosure.DETAILED DESCRIPTION

[0015] In the following detailed description, numerous specific details are set forth by way of examples to provide a thorough understanding of the relevant teachings related to the exemplary embodiments. However, it should be apparent that the present teachings may be practiced without such details. In other instances, well known methods, procedures, components, and / or circuitry have been described at a relatively high-level, without detail, in order to avoid unnecessarily obscuring aspects of the present teachings.

[0016] The following detailed description is presented to enable a person skilled in the art to make and use the methods and devices disclosed in one or more exemplary embodiments of the present disclosure. For purposes of explanation, specific nomenclature is set forth to provide a thorough understanding of the present disclosure. However, it will be apparent to one skilled in the art that these specific details are not required to practice the disclosed exemplary embodiments. Descriptions of specific exemplary embodiments are provided only as representative examples. Various modifications to the exemplary implementations will be plain to one skilled in the art, and the general principles defined herein may be applied to other implementations and applications without departing from the scope of the present disclosure. The present disclosure is not intended to be limited to the implementations shown, but is to be accorded the widest possible scope consistent with the principles and features disclosed herein.

[0017] Disclosed herein describes an exemplary cost-effective high energy damping elastomer for producing an exemplary energy damping system which cause a three times more damping capacity compared to a common energy damping system produced by a common damping elastomer. In an exemplary embodiment, the term “elastomer” may refer to a macromolecule with various average molecular weight that exhibits the viscoelastic properties. In an exemplary embodiment, the term “high energy damping elastomer” may refer to an elastomer that can reduce and / or eliminate unwanted vibration produced by a mechanical system and / or a natural phenomenon like earthquake. In an exemplary embodiment, the term “damping capacity” may refer to a property of a material for measuring the material’s ability of reducing or dissipating of an energy during a mechanical vibration and / or a wave propagation.

[0018] Furthermore, disclosed herein describes an exemplary synthesis method for producing an exemplary high energy damping elastomer.

[0019] Fig.lA illustrates flowchart of an exemplary synthesis method 100 for producing an exemplary high energy damping elastomer, consistent with one or more exemplary embodiments of the present disclosure. In an exemplary embodiment, as illustrated in Fig.lA, the exemplary synthesis method 100 may comprise at least four main steps. The first step 102 may comprise making a first mixture by mixing a polyether diol and a diisocyanate. Next step (104) may comprise preparing a second mixture by blending a triol, a diamine, and a gelation catalyst. In next step (106), a third mixture may be obtained by adding the first mixture to the second mixture in a predetermined time and in final step (108), the high energy damping elastomer may be produced by curing the third mixture in a first temperature for a first curing time and in a second temperature for a second curing time.

[0020] In further detail with respect to step 102, as illustrated in Fig.lB, step 102 may comprise adding the polyether diol to the diisocynate in a room temperature 1022, controlling a mixing temperature to reach a first prearranged temperature 1024, degassing the mixture of the polyether diol and the diisocynate 1026, and heating the mixture of the polyether diol and the diisocynate in a second prearranged temperature for a prearranged time 1028.

[0021] In an exemplary embodiment, due to the exothermic nature of mixing the polyether diol and diisocynate, in order to reach to the first prearranged temperature of step 1024, it is necessary to set a temperature rise rate of less than 2 °C / min. In an exemplary embodiment, the first prearranged temperature may be about 60 °C.

[0022] In one or more exemplary embodiment, the mixture of step 1028 may be heated in a prearranged temperature of 75°C for at least 80 minutes to obtain the first mixture.

[0023] In an exemplary embodiment, the poly ether diol may be selected from a group of poly tetramethylene ether glycol (PTMEG), polypropylene glycol with a low average molecular weight (PPG), a mixture thereof, or other types of polyether diol that are well known for thoseskilled in the art. In a particular exemplary embodiment, the polyether diol may comprise poly tetramethylene ether glycol (PTMEG).

[0024] In an exemplary embodiment, the diisocyanate may be selected from a group of toluene diisocyanate (TDI), methylene diphenyl diisocyanate (MDI), 1,5-naphthalene diisocyanate (ND I), a mixture of at least two thereof, or other types of diisocynate that are well known for those skilled in the art. In a particular exemplary embodiment, diisocyanate may comprise the methylene diphenyl diisocyanate (MDI).

[0025] In one or more exemplary embodiments, the polyether diol and the diisocyanate may be mixed in a mass ratio of 1:1.44 to prepare the first mixture (step 102).

[0026] In further detail with respect to step 104, as illustrated in Fig. 1C, step 104 may comprise at least three main steps. First step may comprise mixing an exemplary triol and an exemplary gelation catalyst in a temperature of 60°C for 15 minutes 1042. Then, the exemplary diamine may be added to the mixture of the exemplary triol and gelation catalyst in a room temperature for at least 5 minutes 1044. In final step (1046), the mixture of the exemplary triol, gelation catalyst, and diamine may be heated in a temperature of 60 °C for 15 minutes to obtain the second mixture.

[0027] In one or more exemplary embodiments, a mass ratio of the exemplary triol: the exemplary diamine: the exemplary gelation catalyst may be 5:1:2 to reach the second mixture of step 104.

[0028] In an exemplary embodiment, the term “diamine” may refer to an organic substance containing at least two reactive amino groups. In one or more exemplary embodiments, the exemplary diamine may be selected from a group of 4, 4 diaminodiphenylmethane, 2-methyl-4,6-bis(methylthio)benzene-l,3-diamine, a mixture thereof, or other types of diamine that are well known for those skilled in the art. In a particularexemplary embodiment, the exemplary diamine may comprise 4, 4 diaminodiphenylmethane (MOCA).

[0029] In an exemplary embodiment, the term “triol” may refer to an organic substances that contains at least three hydroxyl groups. In one or more exemplary embodiments, the exemplary triol may comprise trimethylolpropane (TMP).

[0030] In an exemplary embodiment, the term “gelation catalyst” may refer to a chemical substance that apply in a reaction to form a three dimensional network through a chemical or physical cross linking. In one or more exemplary embodiments, the exemplary gelation catalyst may comprise l,4-diazabicyclo[2.2.2]octane (DABCO) or other types of gelation catalyst that are well known for those skilled in the art.

[0031] In one or more exemplary embodiments, the high energy damping elastomer produced in accordance with one or more exemplary embodiments of the present disclosure may indicate a maximum energy damping in a high energy damping elastomer glass transition. In an exemplary embodiment, the term “glass transition region” may refer to a temperature range that a macromolecule undergo a glassy state to a rubbery state and the temperature region extends from a beginning of a macromolecule’s module drop until a plateau. In one or more exemplary embodiment, the high energy damping elastomer glass transition may be occurred in a temperature range of -2 °C to 50 °C.

[0032] In one or more exemplary embodiments, the exemplary high energy damping elastomer may comprise a damping factor more than 1 that is occurred in a temperature in a range of 15°C to 50 °C. In an exemplary embodiment, the term “damping factor” may refer to an index that is ratio of an elastomer’s loss modulus to an elastomer’s storage modulus and exhibits how an elastomer can dissipate energy when a stress is applied.In one or more exemplary embodiments, a damping capacity of an exemplary energy damping system produced by the exemplary high energy damping elastomer is three times more than an energy damping system produced by a common elastomer in a same consumption volume.EXAMPLES

[0033] Hereinafter, one or more exemplary embodiments will be described in further detail with reference to examples. It will be obvious to a person having ordinary skill in the art that these examples may be for illustrative purposes only and are not to be interpreted to limit the scope of the present disclosure.Example 1: Obtaining First Mixture of Polyether Diol and Diisocyanate

[0034] In this example, exemplary first mixture was prepared based on an exemplary process similar to Fig. IB. To make exemplary first mixture, 45 g of MDI was mixed to 65 g of PTMEG in temperature of 25 °C. After 15 minutes that a temperature of the mixture of MDI and PTMEG was reached to 60 °C, a degassing step was took place for 5 minutes utilizing a vacuum pump. Afterward, the mixture was heated in temperature of 75 °C utilizing a first oven for at least 80 minutes.Example 2: Obtaining Second Mixture of Triol, Gelation Catalyst, and Diamine

[0035] In this example, exemplary second mixture was fabricated based on an exemplary process similar to Fig.lC. To make exemplary second mixture, 50 g of TMP was mixed to 10 g of DABCO 33LV and the mixture of TMP and DABCO 33LV was heated in temperature of 60 °C utilizing a second oven for at least 15 minutes. Afterward, 20 g of MOCA was added to the mixture of TMP and DABCO 33LV and mixed in a room temperature for at least 5 minutes. In final step, the mixture of TMP, DABCO 33LV, and MOCA was heated in temperature of 60 °C utilizing the second oven for at least 15 minutes. The preparation of the second mixturewas took place about 30 minutes after curing the first mixture in the first oven so both first and second mixtures were ready in a same time.

[0036] The properties of all raw materials used for preparing the exemplary first and second mixtures were listed in Table.l.Table.l: Raw Materials and Their Properties for Obtaining the First and Second MixturesExample 3: Synthesis High Energy Damping ElastomerIn this example, exemplary high energy damping elastomer was prepared based on an exemplary process similar to Fig.lA. To synthesize the exemplary high energy damping elastomer, the exemplary third mixture was obtained by mixing the exemplary first mixture (Example. 1) and the exemplary second mixture (Example.2) in a room temperature for at least 9 minutes. Following that, a degassing step was carried out for 5 minutes and the exemplary degased third mixture was poured inside a mold. Afterward, the mold containing the exemplary degased third mixture was heated in the oven at 75 °C for 10 hours and then for 2 hours at 100 °C until the exemplary high energy damping elastomer was synthesized. The exemplary synthesized high energy damping elastomer is illustrated in Fig.2.Example.4: Dynamic Mechanical Analysis

[0037] In this example, exemplary produced high energy damping elastomer in “Example. 3” was characterized by dynamic mechanical analysis (DMA) to investigate viscoelastic properties of the exemplary synthesized high energy damping elastomer through the storage modules and loss tangent (tan 6) measurements. The storage modulus (G’), the loss modulus (G”), and the tan 6 over a temperature range of -60 °C to 100 °C are shown in Fig.3. As illustrated in Fig.3, a glass transitional region of the synthesized high energy damping elastomer was occurred in a temperature range of -2 °C to 50 °C that the high energy damping elastomer indicates the maximum energy damping in this region. Furthermore, the results shows that the damping factor of the high energy damping elastomer is more than 1 in a temperature of 15.7 °C to 49 °C. Also, the high energy damping elastomer shows a glass temperature (Tg) of 22.9 °C. these results shows that the synthesized high energy damping elastomer has a good applicability in the room temperature.

[0038] Example.5: Energy Damping System Simulation Utilizing the High Energy Damping Elastomer

[0039] In this example, an exemplary energy damping system was simulated utilizing the synthesized high energy damping elastomer in “Example. 3” and a consumption volume of the exemplary produced high energy damping elastomer was compared to an energy damping system produced by a common and commercial elastomer. Both energy damping systems have a damping coefficient of 267 KN.sec.m-1(C=267 KN.Sec / m) at 1 Hz vibration frequency.

[0040] The damping coefficient of an energy damping system was calculated based on the below formula:Such that KL and m represents the loss stiffness and the angular frequency of the energy damping system, respectively. Furthermore, the KL was calculated by the formula of:KL= ^ (2) where G”, A, and h are a loss modulus, a required surface area, and a thickness of the damping elastomer utilized for producing the energy damping system. Then, the required surface area of the elastomer according to equations 1 and 2 can be measured:A= g (3)

[0041] For a commercial energy damping system produced by the common elastomer, ifG" the damping capacity, the ratio of G" to(— ), and the thickness of the elastomer wereGJ assumed 267 KN.Sec / m, 0.1 Mpa-sec, and 3 cm, respectively. Then the required surface area according to equation 3 is 810 cm2. It can be seen that by using the common elastomer to make the energy damping system and achieve a damping coefficient equal to 267 KN. Seem, an elastomer layer with a thickness of 3 cm and a surface area of 801 cm2is needed.

[0042] Although, for the exemplary produced energy damping elastomer, in accordance with Fig.3 and equation 3, a required surface area was: a — secTherefore, the required surfaced area of the exemplary produced high energy damping elastomer according to “Example.3” is three times less than the common elastomer for achieving a similar damping coefficient. These result indicates that the energy damping produced by the exemplary produced high energy damping elastomer can result in a three time more damping capacity compared to the energy damping system produced by the common elastomer when a same volume of each elastomer was used.

[0043] While the foregoing has described what are considered to be the best mode and / or other examples, it is understood that various modifications may be made therein and that the subject matter disclosed herein may be implemented in various forms and examples, and thatthe teachings may be applied in numerous applications, only some of which have been described herein. It is intended by the following claims to claim any and all applications, modifications and variations that fall within the true scope of the present teachings.

[0044] Unless otherwise stated, all measurements, values, ratings, positions, magnitudes, sizes, and other specifications that are set forth in this specification, including in the claims that follow, are approximate, not exact. They are intended to have a reasonable range that is consistent with the functions to which they relate and with what is customary in the art to which they pertain.

[0045] The scope of protection is limited solely by the claims that now follow. That scope is intended and should be interpreted to be as broad as is consistent with the ordinary meaning of the language that is used in the claims when interpreted in light of this specification and the prosecution history that follows and to encompass all structural and functional equivalents. Notwithstanding, none of the claims are intended to embrace subject matter that fails to satisfy the requirement of Sections 101, 102, or 103 of the Patent Act, nor should they be interpreted in such a way. Any unintended embracement of such subject matter is hereby disclaimed.

[0046] Except as stated immediately above, nothing that has been stated or illustrated is intended or should be interpreted to cause a dedication of any component, step, feature, object, benefit, advantage, or equivalent to the public, regardless of whether it is or is not recited in the claims.

[0047] It will be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective areas of inquiry and study except where specific meanings have otherwise been set forth herein. Relational terms such as first and second and the like may be used solely to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions. An element proceeded by“a” or “an” does not, without further constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0048] Unless otherwise stated, all measurements, values, ratings, positions, magnitudes, sizes, and other specifications that are set forth in this specification, are approximate, not exact. They are intended to have a reasonable range that is consistent with the functions to which they relate and with what is customary in the art to which they pertain.

[0049] It will be understood that the terms and expressions used herein have the ordinary meaning as is accorded to such terms and expressions with respect to their corresponding respective areas of inquiry and study, except where specific meanings have otherwise been set forth herein. Relational terms such as “first” and “second” and the like may be used solely to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions.

[0050] The Abstract of the Disclosure is provided to allow the reader to quickly ascertain the nature of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, it may be seen that various features are grouped together in various implementations. This is for purposes of streamlining the disclosure, and is not to be interpreted as reflecting an intention that the claimed implementations require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed implementation. Thus, the following claims are hereby incorporated into the Detailed Description, with each claim standing on its own as a separately claimed subject matter.

[0051] While various implementations have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more implementations and implementations are possible that are within the scope ofthe implementations. Although many possible combinations of features are shown in the accompanying figures and discussed in this detailed description, many other combinations of the disclosed features are possible. Any feature of any implementation may be used in combination with or substituted for any other feature or element in any other implementation unless specifically restricted. Therefore, it will be understood that any of the features shown and / or discussed in the present disclosure may be implemented together in any suitable combination. Accordingly, the implementations are not to be restricted except in light of the attached claims and their equivalents. Also, various modifications and changes may be made within the scope of the attached claims.

Claims

What is claimed is:

1. A high energy damping elastomer comprising: a poly ether diol; a diisocyanate; a triol; a diamine; and a gelation catalyst.

2. The high energy damping elastomer of claim 1, wherein a mass ratio of the poly ether diol to the diisocyanate is 1 : 1.

443. The high energy damping elastomer of claim 1 or 2, wherein a mass ratio of the triol: the diamine: the gelation catalyst is 5:1:2.

4. The high energy damping elastomer of claim 1, wherein the polyether diol is poly tetramethylene ether glycol (PTMEG).

5. The high energy damping elastomer of claim 1, wherein the polyether diol is selected from a group of polytetramethylene ether glycol, polypropylene glycol with a low average molecular weight (PPG), or a mixture thereof.

6. The high energy damping elastomer of claim 1, wherein the diisocyanate is methylene diphenyl diisocyanate (MDI).

7. The high energy damping elastomer of claim 1, wherein the diisocyanate is selected toluene diisocyanate (TDI), methylene diphenyl diisocyanate (MDI), 1,5 -naphthalene diisocyanate (NDI), or a mixture of at least two thereof8. The high-damping elastomer of claim 1, wherein the triol is trimethylolpropane (TMP).

9. The high-damping elastomer of claim 1, wherein the diamine is 4, 4 diaminodiphenylmethane.

10. The high energy damping elastomer of claim 1, wherein the diamine is selected from a group of 4, 4 diaminodiphenylmethane, 2-methyl-4,6-bis(methylthio)benzene-l,3-diamine, or a mixture thereof.

11. The high energy damping elastomer of claim 1, wherein the gelation catalyst is 1,4- diazabicyclo[2.2.2]octane.

12. The high energy damping elastomer of claim 1, wherein a maximum energy damping of the high energy damping elastomer is occurred in a glass transition region in a range of -2 °C to 50 °C.

13. The high energy damping elastomer of claim 1, wherein a damping factor of the high energy damping elastomer is more than one in a temperature range of 15 °C to 50 °C.

14. The high energy damping elastomer of claim 1, wherein a damping capacity of an energy damping system produced by the high energy damping elastomer is three times more than a an energy damping system produced by a common elastomer in a same consumption volume.

15. A synthesis method for producing a high energy damping elastomer of any one of claims 1 to 14 comprising: making a first mixture by mixing the polyether diol and the diisocyanate; preparing a second mixture by mixing the triol, the gelation catalyst, and the diamine; obtaining a third mixture by adding the first mixture to the second mixture in a predetermined time; and producing the high energy damping elastomer by curing the third mixture in a first temperature for a first curing time and in a second temperature for a second curing time.

16. The synthesis method of claim 15, wherein the predetermined time is about 9 minutes.

17. The synthesis method of claim 15, wherein the first temperature is adjusted in 75°C.

18. The synthesis method of claim 15, wherein the first curing time is 10 minutes.

19. The synthesis method of claim 15, wherein the second temperature is adjusted in 100°C.

20. The synthesis method of claim 15, wherein the second curing time is about 2 hours.

21. The synthesis method of claim 15, wherein making the first mixture comprising following steps:(i) adding the polyether diol to the diisocyanate in a room temperature;(ii) controlling a mixing temperature to reach a first prearranged temperature wherein increase in a temperature rate is less than 2 °C / min; and(iii) heating the mixture of the polyether diol and the diisocyanate in a second prearranged temperature for a prearranged time.

22. The synthesis method of claim 21, further comprising degassing the mixture of the polyether diol and the diisocyanate before step (iii).

23. The synthesis method of claim 21, wherein the first prearranged temperature is about 60 °C.

24. The synthesis method of claim 21, wherein the second prearranged temperature is about 75 °C.

25. The synthesis method of claim 21, wherein the prearranged time is at least 80 minutes.

26. The synthesis method of claim 16, wherein preparing the second mixture comprising following steps: mixing the triol and the gelation catalyst in a temperature of 60°C for 15 minutes; adding the diamine to the mixture of the triol and the gelation catalyst in a room temperature for at least 5 minutes; andheating the mixture of the triol, the gelation catalyst, and the diamine in a temperature of 60 °C for 15 minutes.

Citation Information

Patent Citations

  • Polyurethane elastomer articles from low free diphenylmethane diisocyanate prepolymers

    US20090110894A1