CN112375374A - Viscoelastic damping material, preparation method and application - Google Patents
Viscoelastic damping material, preparation method and application Download PDFInfo
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- CN112375374A CN112375374A CN202011265643.0A CN202011265643A CN112375374A CN 112375374 A CN112375374 A CN 112375374A CN 202011265643 A CN202011265643 A CN 202011265643A CN 112375374 A CN112375374 A CN 112375374A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
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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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
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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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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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
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6685—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3225 or polyamines of C08G18/38
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
- C08K5/1575—Six-membered rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
- F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction
Abstract
The invention provides a viscoelastic damping material and a preparation method and application thereof, and the viscoelastic damping material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier. The viscoelastic damping material is a polyurethane elastomer high polymer material containing a carbamate structure generated by the reaction of isocyanate and hydroxyl in polyether polyol, and can be poured into the steel spring vibration isolator, so that the viscoelastic damping material is called as a liquid rubber or pouring type viscoelastic damping material, can be crosslinked and solidified to form a stable three-dimensional network structure after pouring, cannot topple over and flow out in the processes of carrying, mounting and using, and meets both the technological performance and the damping performance.
Description
Technical Field
The invention relates to the technical field of damping materials, in particular to a viscoelastic damping material, and a preparation method and application thereof.
Background
With the development of modern industrial technology, the noise generation range is wider and wider, the generation frequency is higher and higher, more and more areas are exposed to noise pollution, and the noise pollution becomes the fourth most harm after three wastes. On one hand, noise pollution can cause hearing damage to people, cause endocrine and mental disorders to cause diseases, and on the other hand, accuracy of instruments and meters can be reduced to influence normal operation of equipment. Therefore, vibration damping and noise reduction are problems which are urgently needed to be solved in many fields at present.
The steel spring vibration isolator is widely applied and is usually placed between a vibration source and an equipment foundation to reduce the transmission of vibration and noise, so that the purposes of vibration attenuation and noise reduction are achieved. Steel spring vibration isolators generally consist of a steel spring structure providing the necessary stiffness and a damping material providing the necessary viscosity, and commonly used viscoelastic damping materials include high molecular materials such as nitrile rubber, silicone rubber, butyl rubber, silicone grease, and the like.
However, in the production and assembly process of the steel spring vibration isolator, it is difficult for solid damping materials such as rubber to uniformly fill the cavity part of the steel spring vibration isolator, the process is complicated, and the damping performance of the materials is seriously affected. Based on the defects of the existing materials, a damping material filling steel spring vibration isolator which meets the pouring requirement and has good damping performance is needed.
Disclosure of Invention
In view of the above, the invention provides a viscoelastic damping material, a damping constrained layer coating and a preparation method thereof, so as to solve the defects in the prior art.
In a first aspect, the invention provides a viscoelastic damping material, which comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier.
Optionally, the viscoelastic damping material, the organic small molecule hybrid damping modifier comprises one or more of N, N-dicyclohexyl-2-benzothiazolesulfenamide, pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 3, 9-bis {1, 1-dimethyl-2 [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane.
Optionally, the viscoelastic damping material has a polyether polyol functionality of 2-3 and an average molecular weight of 1000-4000.
Optionally, the viscoelastic damping material includes one or more of toluene diisocyanate, diphenylmethane diisocyanate, 1, 6-hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, trimethylhexamethylene diisocyanate, methylcyclohexyl diisocyanate, dicyclohexylmethane diisocyanate, and tetramethylxylylene diisocyanate.
Optionally, in the viscoelastic damping material, the polyether polyol includes polyoxypropylene polyol and/or polytetrahydrofuran diol, and the polyoxypropylene polyol includes polyoxypropylene diol or oxypropylene triol.
Optionally, in the viscoelastic damping material, the amino-terminated chain extender includes one or more of 3, 5-diethyltoluenediamine, 3, 5-dimethylthiotoluenediamine, 2, 4-diamino-3, 5-dimethylthiochlorobenzene, 4 '-bis-sec-butylaminodiphenylmethane, N, -dialkylphenylenediamine, 2, 4-diamino-3-methylthio-5-propyltoluene, 3' -dimethyl-4, 4 '-diaminodicyclohexylmethane, 4' -bis-sec-butylaminodicyclohexylmethane, and 3,3 '-dimethyl-4, 4' -bis-sec-butylaminodicyclohexylmethane.
In a second aspect, the invention further provides a preparation method of the viscoelastic damping material, which comprises the preparation of the component A and the preparation of the component B, wherein the preparation of the component A comprises the following steps: putting the polyether polyol into a reaction container, then adding the diisocyanate, and reacting until the mass content of NCO reaches a preset value to obtain a component A;
the preparation of the component B comprises the following steps:
placing the polyether polyol and the amino chain extender into a reactor;
heating and melting the organic micromolecule hybridization damping modifier, adding the organic micromolecule hybridization damping modifier into a reactor, and uniformly stirring to obtain the component B.
Optionally, in the preparation method of the viscoelastic damping material, the preparation of the component a specifically includes: and (2) placing the polyether polyol into a reaction container, heating to 120-130 ℃, dehydrating for 1.5-2 h under the vacuum degree of 133-135 Pa, then cooling to 50-60 ℃, adding diisocyanate under normal pressure, heating to 85-95 ℃, preserving heat for 1.5-2.5 h, and reacting until the mass content of NCO reaches a preset value to obtain the component A.
Optionally, in the preparation method of the viscoelastic damping material, the reaction is carried out until the NCO mass content reaches 6-10%, and the component A is obtained.
In a third aspect, the invention also provides the application of the viscoelastic damping material or the pouring type damping material in a steel spring vibration isolator.
Compared with the prior art, the viscoelastic damping material provided by the invention and the preparation method and application thereof have the following beneficial effects:
(1) the viscoelastic damping material is a polyurethane elastomer high polymer material containing a carbamate structure generated by the reaction of isocyanate and hydroxyl in polyether polyol, and can be poured into a steel spring vibration isolator, so that the viscoelastic damping material is called as a liquid rubber or pouring type viscoelastic damping material, can be crosslinked and cured to form a stable three-dimensional network structure after pouring, cannot topple and flow out in the processes of carrying, mounting and using, and not only meets the process performance, but also meets the damping performance;
(2) according to the preparation method of the viscoelastic damping material, the crosslinking degree of the viscoelastic damping material is adjusted by changing the proportion of high-functionality polyether polyol in the viscoelastic damping material, so that the viscosity of the cast viscoelastic damping material is favorably improved under the condition that the viscoelastic damping material has certain elasticity, and the damping performance of the steel spring vibration isolator is favorably improved; meanwhile, the organic micromolecule hybrid damping modifier is added into the viscoelastic damping material, so that a hydrogen bond structure is formed, and the damping temperature range and the damping performance of the spring vibration isolator are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The viscoelastic damping material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier.
Specifically, the diisocyanate comprises one or more of toluene diisocyanate, diphenylmethane diisocyanate, 1, 6-hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, trimethyl hexamethylene diisocyanate, methylcyclohexyl diisocyanate, dicyclohexylmethane diisocyanate and tetramethylxylylene diisocyanate; in the examples of the present application, 365 parts by weight of diphenylmethane diisocyanate was used as the diisocyanate.
Specifically, the polyether polyol comprises polyoxypropylene polyol and/or polytetrahydrofuran diol, the functionality of the polyether polyol is 2.0-3.0, and the average molecular weight is 1000-4000; the polyoxypropylene polyol includes polyoxypropylene diol such as DL1000, DL2000, DL4000, etc., which are produced by east Dow of Shandong Lanxingdong, polyoxypropylene triol such as TMD-3000, TMN-1000, TMN-3050D, etc., which are polyether moieties of Tianjin petrochemical company, polytetrahydrofuran ether glycol such as PTMG1000, PTMG2000, etc., which are produced by Mitsubishi chemical corporation, Japan; in the embodiment of the application, 635 parts by weight of TMN-3050D is adopted as polyether polyol in the component A, and 800 parts by weight of DL2000 is adopted as polyether polyol in the component B.
Specifically, the amino-terminated chain extender comprises one or more of 3, 5-diethyltoluenediamine, 3, 5-dimethylthiotoluenediamine, 2, 4-diamino-3, 5-dimethylthiochlorobenzene, 4 '-bis-sec-butylaminodiphenylmethane, N, -dialkylphenylenediamine, 2, 4-diamino-3-methylthio-5-propyltoluene, 3' -dimethyl-4, 4 '-diaminodicyclohexylmethane, 4' -bis-sec-butylaminodicyclohexylmethane and 3,3 '-dimethyl-4, 4' -bis-sec-butylaminodicyclohexylmethane; 194 parts by weight of 4, 4' -bis-sec-butylaminodiphenylmethane are adopted as the amino-terminated chain extender in the embodiment of the application.
Specifically, the organic micromolecule hybridization damping modifier comprises one or more of N, N-dicyclohexyl-2-benzothiazole sulfonamide, tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, and 3, 9-bis {1, 1-dimethyl-2 [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane; in the embodiment of the application, the organic small-molecule hybrid damping modifier adopts 6 parts by weight of N, N-dicyclohexyl-2-benzothiazole sulfonamide.
Based on the same inventive concept, the embodiment of the application also provides a preparation method of the viscoelastic damping material, which comprises the preparation of the component A and the preparation of the component B, wherein the preparation of the component A comprises the following steps: adding 635 parts by weight of polyether polyol TMN-3050D into a four-neck flask, heating to 120 ℃, dehydrating for 1.5h under the condition that the vacuum degree is 133Pa, cooling to 50 ℃, adding 365 parts by weight of diphenylmethane diisocyanate under normal pressure, heating to 80 ℃, preserving the heat for 1.5h, stopping heating until the titration value of the NCO mass content reaches 9.6 +/-0.3%, cooling to room temperature, and discharging to obtain a prepolymer A component;
the preparation of the component B comprises the following steps: 194 parts by weight of 4, 4' -bis-sec-butylaminodiphenylmethane and 800 parts by weight of polyether polyol DL2000 are added into a container, and stirring is started; in the stirring process, 6 parts by weight of heated and melted N, N-dicyclohexyl-2-benzothiazole sulfonamide is added into a dispersion container, and the mixture is stirred and dispersed for 20min to obtain the component B.
When the viscoelastic damping material is used, the component A and the component B are mixed according to the volume ratio of (1:0.9) - (1:1.1), and the mixed two components are injected into the steel spring vibration isolator by using pouring equipment.
In the application, the viscoelastic damping material is a polyurethane elastomer high polymer material containing a carbamate structure generated by the reaction of isocyanate and hydroxyl in polyether polyol, and can be poured into the steel spring vibration isolator, so that the viscoelastic damping material is called as liquid rubber or a pouring type viscoelastic damping material, can be crosslinked and cured to form a stable three-dimensional network structure after pouring, cannot topple over and flow out in the processes of carrying, mounting and using, and meets both the technological performance and the damping performance; the viscoelastic damping material of the present application has deformations of two different mechanisms, elastic and viscous. Under the action of external force, the partial molecular chains in the material can be deformed such as stretched and twisted, and can also be relatively slipped and twisted. When the external force is removed, the deformed molecular chains can be reset, and the relative motion between the chain segments can be partially restored to the original condition, namely the material presents elasticity; however, the molecular segments do not recover completely and a permanent deformation occurs, i.e. the material exhibits a viscous behavior. The damping performance of the polyurethane elastomer is mainly derived from the internal loss of the material, under the action of an alternating external force, the internal friction resistance of a sub-chain segment in the material needs to be overcome to do work, so that the strain lags behind the stress, and the vibration energy is converted into heat energy through the viscous components of the material to be dissipated; according to the method, the cross-linking degree of the polyether polyol with high functionality in the casting type viscoelastic damping material is adjusted by changing the proportion of the polyether polyol with high functionality in the casting type viscoelastic damping material, so that the viscosity of the casting type viscoelastic damping material is favorably improved under the condition that the viscoelastic damping material has certain elasticity, and the damping performance of the steel spring vibration isolator is favorably improved; meanwhile, the organic micromolecule hybrid damping modifier is added into the viscoelastic damping material, so that a hydrogen bond structure is formed, and the damping temperature range and the damping performance of the spring vibration isolator are improved.
Example 2
The viscoelastic damping material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier.
Specifically, in the examples of the present application, 205 parts by weight of toluene diisocyanate was used as the diisocyanate.
Specifically, the functionality of the polyether polyol is 2.0-3.0, and the average molecular weight is 1000-4000; in the examples of the application, the polyether polyol in the component A adopts 795 parts by weight of polytetrahydrofuran polyol PTMG2000, and the polyether polyol in the component B adopts 427 parts by weight of polyether polyol TMD-3000 and 480 parts by weight of polyether polyol DL 4000.
Specifically, the amino-terminated chain extender in the embodiment of the application adopts 75 parts by weight of 3, 5-dimethylthiotoluenediamine.
Specifically, in the embodiment of the application, 8 parts by weight of 3, 9-bis {1, 1-dimethyl-2 [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane is used as the organic small molecule hybrid damping modifier.
Based on the same inventive concept, the embodiment of the application also provides a preparation method of the viscoelastic damping material, which comprises the preparation of the component A and the preparation of the component B, wherein the preparation of the component A comprises the following steps: adding 795 parts by weight of polytetrahydrofuran polyol PTMG2000 into a four-neck flask, heating to 125 ℃, dehydrating for 2 hours under the condition that the vacuum degree is 135Pa, cooling to 55 ℃, adding 205 parts by weight of toluene diisocyanate under normal pressure, heating to 85 ℃, preserving heat for 2 hours, stopping heating until the titration value of the NCO mass content reaches 6.3 +/-0.3%, cooling to room temperature, and discharging to obtain a prepolymer A component;
the preparation of the component B comprises the following steps: adding 75 parts by weight of 3, 5-dimethylthio toluenediamine, 427 parts by weight of polyether polyol TMD-3000 and 480 parts by weight of polyether polyol DL4000 into a container, and stirring; in the stirring process, 8 parts by weight of 3, 9-bis {1, 1-dimethyl-2 [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane which is heated and melted is added into a dispersing container, and the mixture is stirred and dispersed for 30min to obtain the component B.
When the viscoelastic damping material is used, the component A and the component B are mixed according to the volume ratio of (1:0.9) - (1:1.1), and the mixed two components are injected into the steel spring vibration isolator by using pouring equipment.
Example 3
The viscoelastic damping material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier.
Specifically, 398 parts by weight of isophorone diisocyanate is used as the diisocyanate in the examples of the present application.
Specifically, the functionality of the polyether polyol is 2.0-3.0, and the average molecular weight is 1000-4000; in the embodiment of the application, 602 parts by weight of TMD-3000 parts by weight of polyether polyol is adopted as polyether polyol in the component A, and 859 parts by weight of PTMG-2000 parts by weight of polytetrahydrofuran polyol is adopted as polyether polyol in the component B.
Specifically, the amino-terminated chain extender in the embodiment of the application adopts 131 parts by weight of 4, 4' -bis-sec-butylaminodiphenylmethane.
Specifically, in the embodiment of the application, 10 parts by weight of 3, 9-bis {1, 1-dimethyl-2 [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane is used as the organic small molecule hybrid damping modifier.
Based on the same inventive concept, the embodiment of the application also provides a preparation method of the viscoelastic damping material, which comprises the preparation of the component A and the preparation of the component B, wherein the preparation of the component A comprises the following steps: adding 602 parts by weight of polyether polyol TMD-3000 into a four-neck flask, heating to 130 ℃, dehydrating for 2h under the condition that the vacuum degree is 134Pa, cooling to 60 ℃, adding 398 parts by weight of isophorone diisocyanate under normal pressure, heating to 90 ℃, preserving heat for 2h, stopping heating until the titration value of the NCO mass content reaches 7.8 +/-0.3%, cooling to room temperature, and discharging to obtain a prepolymer A component;
the preparation of the component B comprises the following steps: adding 131 parts by weight of 4, 4' -bis-sec-butylaminodiphenylmethane and 859 parts by weight of polytetrahydrofuran polyol PTMG2000 into a container, and stirring; in the stirring process, 10 parts by weight of 3, 9-bis {1, 1-dimethyl-2 [ beta- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane which is heated and melted is added into a container, and the mixture is stirred and dispersed for 35min to obtain the component B.
When the viscoelastic damping material is used, the component A and the component B are mixed according to the volume ratio of (1:0.9) - (1:1.1), and the mixed two components are injected into the steel spring vibration isolator by using pouring equipment.
Example 4
The viscoelastic damping material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier.
Specifically, 316 parts by weight of diphenylmethane diisocyanate was used as the diisocyanate in the examples herein.
Specifically, the functionality of the polyether polyol is 2.0-3.0, and the average molecular weight is 1000-4000; in the embodiment of the application, 684 parts by weight of polyether polyol DL4000 is used as polyether polyol in the component A, 244 parts by weight of polyether polyol DL4000 and 545 parts by weight of polyether polyol TMN-3050D are used as polyether polyol in the component B.
Specifically, 203 parts by weight of 4, 4' -bis-sec-butylaminodiphenylmethane is adopted as the amino-terminated chain extender in the embodiment of the application.
Specifically, in the embodiment of the application, 8 parts by weight of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester is adopted as the organic small molecule hybrid damping modifier.
Based on the same inventive concept, the embodiment of the application also provides a preparation method of the viscoelastic damping material, which comprises the preparation of the component A and the preparation of the component B, wherein the preparation of the component A comprises the following steps: adding 684 parts by weight of polyether polyol DL4000 into a four-neck flask, heating to 130 ℃, dehydrating for 2h under the condition that the vacuum degree is 135Pa, cooling to 60 ℃, adding 316 parts by weight of diphenylmethane diisocyanate under normal pressure, heating to 95 ℃, preserving heat for 2.5h, stopping heating until the titration value of the NCO mass content reaches 9.2 +/-0.3%, cooling to room temperature, and discharging to obtain a prepolymer A component;
the preparation of the component B comprises the following steps: 203 parts by weight of 4, 4' -bis-sec-butylaminodiphenylmethane, 244 parts by weight of polyether polyol DL4000 and 545 parts by weight of polyether polyol TMN-3050D are added into a container, and stirring is started; in the stirring process, 8 parts of heating-melted tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester is added into a container, and the mixture is stirred and dispersed for 40min to obtain the component B.
When the viscoelastic damping material is used, the component A and the component B are mixed according to the volume ratio of (1:0.9) - (1:1.1), and the mixed two components are injected into the steel spring vibration isolator by using pouring equipment.
Comparative example 1
The viscoelastic damping material comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol and 65-280 parts of an amino-terminated chain extender.
Specifically, 316 parts by weight of dicyclohexylmethane diisocyanate was used as the diisocyanate in the comparative examples of the present application.
Specifically, the functionality of the polyether polyol is 2.0-3.0, and the average molecular weight is 1000-4000; in the embodiment of the application, 684 parts by weight of polyether polyol TDB-4000 is adopted as polyether polyol in the component A, 252 parts by weight of polyether polyol DL4000 and 545 parts by weight of polyether polyol TMD-3000 are adopted as polyether polyol in the component B.
Specifically, 203 parts by weight of 4, 4' -bis-sec-butylaminodicyclohexylmethane is adopted as the amino-terminated chain extender in the embodiment of the application.
Based on the same inventive concept, the embodiment of the application also provides a preparation method of the viscoelastic damping material, which comprises the preparation of the component A and the preparation of the component B, wherein the preparation of the component A comprises the following steps: adding 684 parts by weight of polyether polyol TDB-4000 into a four-neck flask, heating to 130 ℃, dehydrating for 2h under the condition that the vacuum degree is 135Pa, cooling to 60 ℃, adding 316 parts by weight of dicyclohexylmethane diisocyanate under normal pressure, heating to 95 ℃, preserving heat for 2.5h, stopping heating until the titration value of the NCO mass content reaches 9.2 +/-0.3%, cooling to room temperature, and discharging to obtain a prepolymer A component;
the preparation of the component B comprises the following steps: 203 parts by weight of 4, 4' -bis-sec-butylaminodicyclohexylmethane, 252 parts by weight of polyether polyol DL4000 and 545 parts by weight of polyether polyol TMD-3000 are added into a container, and stirring is started; stirring and dispersing for 40min to obtain component B.
When the viscoelastic damping material is used, the component A and the component B are mixed according to the volume ratio of (1:0.9) - (1:1.1), and the mixed two components are injected into the steel spring vibration isolator by using pouring equipment.
Performance testing
The components A and B in the viscoelastic damping materials of the examples 1-4 and the comparative example 1 were mixed according to the volume ratio of 1:1, the A, B component after mixing was injected into the cavity of the steel spring vibration isolator by using a casting device, and the performance of the damping material was tested after curing, and the results are shown in the following table 1.
TABLE 1 Performance indices of viscoelastic damping materials prepared in different examples
As can be seen from the above Table 1, the viscoelastic damping materials prepared in the embodiments 1 to 4 of the present invention have good tensile strength, elongation at break, tear strength and damping performance. Meanwhile, as can be seen from comparison between examples 1-4 and comparative example 1, the damping performance of the hybrid damping modifier is obviously improved by adding the organic micromolecules.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The viscoelastic damping material is characterized by comprising a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 180-420 parts of diisocyanate and 550-840 parts of polyether polyol; the component B comprises the following raw materials in parts by weight: 760-920 parts of polyether polyol, 65-280 parts of an amino-terminated chain extender and 5-12 parts of an organic small molecule hybridization damping modifier.
2. The viscoelastic damping material as claimed in claim 1 wherein the organic small molecule hybrid damping modifier comprises one or more of N, N-dicyclohexyl-2-benzothiazolesulfenamide, pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 3, 9-bis {1, 1-dimethyl-2 [ β - (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy ] ethyl } -2,4,6, 8-tetraoxaspiro (5,5) undecane.
3. The viscoelastic damping material of claim 1 wherein the polyether polyol has a functionality of 2 to 3 and an average molecular weight of 1000 to 4000.
4. The viscoelastic damping material of claim 1 wherein said diisocyanate comprises one or more of toluene diisocyanate, diphenylmethane diisocyanate, 1, 6-hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, trimethylhexamethylene diisocyanate, methylcyclohexyl diisocyanate, dicyclohexylmethane diisocyanate, and tetramethylxylylene diisocyanate.
5. The viscoelastic damping material as claimed in claim 1 wherein the polyether polyol comprises polyoxypropylene polyol comprising polyoxypropylene diol or oxypropylene triol and/or polytetrahydrofuran diol.
6. The viscoelastic damping material as claimed in claim 1 wherein the amino-terminated chain extender comprises one or more of 3,5 diethyltoluenediamine, 3, 5-dimethylthiotoluenediamine, 2, 4-diamino-3, 5-dimethylthiochlorobenzene, 4 '-bis-sec-butylaminodiphenylmethane, N, -dialkylphenylenediamine, 2, 4-diamino-3-methylthio-5-propyltoluene, 3' -dimethyl-4, 4 '-diaminodicyclohexylmethane, 4' -bis-sec-butylaminodicyclohexylmethane, 3 '-dimethyl-4, 4' -bis-sec-butylaminodicyclohexylmethane.
7. A method for preparing a viscoelastic damping material as claimed in any one of claims 1 to 6, comprising the preparation of the A-component and the preparation of the B-component, said preparation of the A-component comprising: putting the polyether polyol into a reaction container, then adding the diisocyanate, and reacting until the mass content of NCO reaches a preset value to obtain a component A;
the preparation of the component B comprises the following steps:
placing the polyether polyol and the amino chain extender into a reactor;
heating and melting the organic micromolecule hybridization damping modifier, adding the organic micromolecule hybridization damping modifier into a reactor, and uniformly stirring to obtain the component B.
8. The method for preparing a viscoelastic damping material as claimed in claim 7, wherein said preparation of component A comprises: and (2) placing the polyether polyol into a reaction container, heating to 120-130 ℃, dehydrating for 1.5-2 h under the vacuum degree of 133-135 Pa, then cooling to 50-60 ℃, adding diisocyanate under normal pressure, heating to 85-95 ℃, preserving heat for 1.5-2.5 h, and reacting until the mass content of NCO reaches a preset value to obtain the component A.
9. The preparation method of the viscoelastic damping material as claimed in claim 7, wherein the component A is obtained by reacting until the NCO mass content reaches 6-10%.
10. The application of the viscoelastic damping material as defined in any one of claims 1 to 6 or the viscoelastic damping material prepared by the preparation method as defined in any one of claims 7 to 9 in a steel spring vibration isolator as a casting type damping material.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020049267A1 (en) * | 2000-08-31 | 2002-04-25 | Cheng Zhang | Organohybrid-based damping material, method for producing the same, and damping improver for damping material |
| CN101085861A (en) * | 2007-06-05 | 2007-12-12 | 北京化工大学 | Polyurethane damping material containing hindered phenol and preparation method thereof |
| WO2017088765A1 (en) * | 2015-11-24 | 2017-06-01 | 上海天洋热熔粘接材料股份有限公司 | Method for preparing modified wet-cured polyurethane hot melt adhesive |
| CN106867391A (en) * | 2017-03-14 | 2017-06-20 | 青岛海洋新材料科技有限公司 | A kind of naval vessel spray coated flame retardant damping coatings material and its manufacture method |
| CN110698633A (en) * | 2019-10-25 | 2020-01-17 | 安徽贝卫新材料科技有限公司 | Hindered amine-containing polyurethane damping material and preparation method thereof |
-
2020
- 2020-11-13 CN CN202011265643.0A patent/CN112375374A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020049267A1 (en) * | 2000-08-31 | 2002-04-25 | Cheng Zhang | Organohybrid-based damping material, method for producing the same, and damping improver for damping material |
| CN101085861A (en) * | 2007-06-05 | 2007-12-12 | 北京化工大学 | Polyurethane damping material containing hindered phenol and preparation method thereof |
| WO2017088765A1 (en) * | 2015-11-24 | 2017-06-01 | 上海天洋热熔粘接材料股份有限公司 | Method for preparing modified wet-cured polyurethane hot melt adhesive |
| CN106867391A (en) * | 2017-03-14 | 2017-06-20 | 青岛海洋新材料科技有限公司 | A kind of naval vessel spray coated flame retardant damping coatings material and its manufacture method |
| CN110698633A (en) * | 2019-10-25 | 2020-01-17 | 安徽贝卫新材料科技有限公司 | Hindered amine-containing polyurethane damping material and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 郭艳宏等: "DZ改性聚醚型聚氨酯阻尼材料的研究", 《材料导报》 * |
| 郭艳宏等: "有机小分子DZ改性HTPB型聚氨酯阻尼材料", 《材料导报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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