CN106633634A - Epoxy resin foam material containing perforated structure and preparation method thereof - Google Patents
Epoxy resin foam material containing perforated structure and preparation method thereof Download PDFInfo
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- CN106633634A CN106633634A CN201610947122.0A CN201610947122A CN106633634A CN 106633634 A CN106633634 A CN 106633634A CN 201610947122 A CN201610947122 A CN 201610947122A CN 106633634 A CN106633634 A CN 106633634A
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- epoxy resin
- epoxy
- firming agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses an epoxy resin foam material containing a perforated structure and a preparation method thereof. The epoxy resin foam material containing the perforated structure comprises the following components by weight: 100 parts of the epoxy resin, 0.5-220 parts of a curing agent, and 1-60 parts of polymer expended microspheres. The epoxy resin foam material containing the perforated structure has the advantages of light weight, high strength, and good noise reduction effect, and is suitable for the application of the sound absorption material. In addition, the preparation method for the epoxy resin foam material has the characteristics of smart conception, simple and convenient operation, safety, environment-friendliness, small energy consumption, and low cost, and is suitable for the industrial production.
Description
Technical field
The present invention relates to a kind of epoxy foams material comprising open-celled structure and preparation method thereof.
Background technology
Sound pollution, not only affects daily life, endangers the auditory system of people, makes one tired, deafness, or even can
Can the various serious diseases of induction, but also can accelerate building, frame for movement it is aging, affect its precision and service life,
A long-standing serious environmental problems are had become, is present in the every aspect of social field.
It is solving the above problems it is critical that research and development excellent noise reduction effect sound-absorbing material：Noise reduction coefficient (NRC) is big
In being considered as just sound-absorbing material equal to 0.2 material.
Traditionally, mainly using mineral wool, glass cotton, foam metal, foam of polymers etc. as sound-absorbing material；Wherein, ore deposit
Cotton, glass cotton have had been found to carcinogenecity, and foam metal is not corrosion-resistant, and the safety of foam of polymers is good, while having resistance to
Burn into is inexpensive, easy processing the advantages of, be expected to become the new sound-absorbing material of a class.
However, the foam of polymers species that noise reduction coefficient (NRC) can be more than or equal to 0.2 is very limited, mainly there is polyene
Hydrocarbon foam, polyurethane foam and melamino-formaldehyde foam；And traditional epoxide resin material, sqouynd absorption lowering noise poor performance, lead to
Coating and adhesive can only be often used as, and its preparation process is also relative complex, need to coordinate curing reaction, viscosity B coefficent,
Mutual relation and impact between decomposition or vaporization, the abscess fixation of foaming agent.
At present, there are no can be used as the relevant report of the epoxy foams material of sound-absorbing material application.
The content of the invention
It is an object of the invention to provide a kind of epoxy foams material comprising open-celled structure, with lightweight, high-strength
Degree, the advantage of excellent noise reduction effect.
A kind of epoxy foams material comprising open-celled structure that the present invention is provided, it includes the group of following parts by weight
Point：100 parts of epoxy resin, 0.5～220 part of firming agent, 1～60 part of polymer expandable microspheres.
Further, it is made up of the component of following parts by weight：100 parts of epoxy resin, 0.5～220 part of firming agent,
1～60 part of polymer expandable microspheres.
Further, it is made up of the component of following parts by weight：100 parts of epoxy resin, 0.5～220 part of firming agent,
2～30 parts of polymer expandable microspheres；Preferably, it is made up of the component of following parts by weight：100 parts of epoxy resin, solidification
0.5～220 part of agent, 2～5 parts of polymer expandable microspheres.
Further,
Described epoxy resin is selected from glycidyl ether type epoxy resin, glycidyl ester epoxy resin, (+)-2,3-Epoxy-1-propanol
In amine epoxy resin, aliphatic epoxy resin, cycloaliphatic epoxy resin any one or it is two or more；
The firming agent selected from polyether amine firming agent, polyamide-based firming agent, imidazole curing agent, amine curing agent,
Acid anhydride type curing agent, carboxylic acidss firming agent, organic hydrazides firming agent, dicy-curing agent, phenolic firming agent, aniline formaldehyde class
In firming agent, polyesters firming agent, polyurethaness firming agent, polysulfide class firming agent any one or it is two or more；
The use temperature of the polymer expandable microspheres is 80～235 DEG C.
Further, the percent opening of the epoxy foams is 8%～85%；The density of the epoxy foams is
0.05～0.9g/cm3。
Further, the compressive strength of the epoxy foams is 1～60MPa.
Present invention also offers a kind of method for preparing above-mentioned epoxy foams material, it is comprised the following steps：
1., extracting epoxy resin, firming agent and polymer expandable microspheres, mix, and obtain expandability epoxy resin composition；
2. step 1. gained expandability epoxy resin composition, is taken, prepolymerization, foaming, solidification obtains final product epoxy foams
Material.
Further, step 2. in, prepolymerized temperature is 15～160 DEG C, the time is 0～12h, and the temperature of foaming is 50
～200 DEG C, the time be 1～12h；Preferably, prepolymerized temperature be 15～45 DEG C, the time be 0～1.5h, the temperature of foaming is
80～130 DEG C, the time be 1～12h.
Present invention also offers purposes of the above-mentioned epoxy foams material as sound-absorbing material.
Further, described sound-absorbing material is sound absorbent for building.
The present invention comprising open-celled structure epoxy foams material, with lightweight, high intensity, excellent noise reduction effect it is excellent
Point, is highly suitable as sound-absorbing material application；Meanwhile, the preparation method of epoxy foams material of the present invention is skillfully constructed, behaviour
Make easy, safe and environment-friendly, energy consumption is little, and low cost is especially suitable for industrialization production.
In the present invention, sound-absorbing material is referred to as acoustic damping materials, deadener, sound-absorbing material etc., with extensive use
On the way, for example, both can be used as sound absorbent for building such as house, buildings, it is also possible to used as transport facilitys such as automobile, trucies
The shell sound-absorbing material of electromotor, and other need the application of sqouynd absorption lowering noise.
Obviously, the above of the invention, according to the ordinary technical knowledge and customary means of this area, without departing from
Under the premise of the above-mentioned basic fundamental thought of the present invention, the modification of other various ways can also be made, is replaced or is changed.
By the following examples the specific embodiment of form, remakes further specifically to the above of the present invention
It is bright.But this scope for being interpreted as above-mentioned theme of the invention should not be only limitted to Examples below.It is all based on the above of the present invention
The technology realized belongs to the scope of the present invention.
Description of the drawings
Fig. 1 is the scanning of the 4th group of experiment epoxy foams material of the gained comprising open-celled structure in the embodiment of the present invention 1
Electron microscope.
Specific embodiment
Raw material, equipment used in the specific embodiment of the invention is known product, is obtained by buying commercially available prod.
First, raw material
1st, epoxy resin：NPEL-128 (TaiWan, China South Asia group)；E-44 (Ba Ling petrochemical industry Co., Ltd)；REN
1774(Huntsman Corporation)；CY-183 (Hubei Xinjing New Material Co., Ltd.)；
2nd, firming agent：BaxxodurTM EC301、V140 and 2-ethyl-4-methylimidazole (BASF)；Second
Diamidogen (Chengdu Cologne chemical reagent factory)；Triethanolamine/triethylene tetramine (Chengdu Cologne chemical reagent factory)；Methyl tetrahydrochysene benzene
Acid anhydride/DMP-30 (Puyang Huicheng Chemicals Co., Ltd)；Tung oil acid anhydride (Hefei Baofeng chemical industry Co., Ltd)；Polyamide 6 50
(Guangzhou Kui Bang Chemical Co., Ltd.s)；M-xylene diamine (Chengdu bass spy's reagent company limited)；
3rd, polymer expandable microspheres：ExpancelTM031DU40 (using 80～135 DEG C of temperature), ExpancelTM
051DU40 (using 108～151 DEG C of temperature), ExpancelTM091DU40 (using 123～173 DEG C of temperature), ExpancelTM
980DU120 (using 158～235 DEG C of temperature) (AkzoNobel N.V.)；
2nd, performance test
1st, percent opening：GB/T 10799-2008 rigid foams perforates and the measure of closed pore volume percentage rate.
2nd, the density of drainage test gained lightweight epoxy acoustic construction material；
3rd, tested using the type universal material experimental machine of INSTRON 4302, the acoustic construction material when compression strain is 10%
(size is 3 × 3 × 1.5cm3) compression performance, sensor is 30KN, and rate of straining is 2mm/min.
4th, using the impedance tube test system (SW422) of Beijing Sheng Wang Acoustic-Electric (BSWA) Technology Co., Ltd., based on transmission function
Impedance tube method (GB/T 18696.2-2002) tests the acoustic absorptivity of acoustic construction material.Test sample is a diameter of 7.8cm,
Thickness is the disk of 1.2cm, and test frequency scope is 100～2500Hz.
Noise reduction coefficient (NRC) is the meansigma methodss of the acoustic absorptivity measured in 250,500,1000,2000Hz, is calculated to arithmetic point
Two afterwards, last position takes 0 or 5；It is 1 that the minima of noise reduction coefficient is 0, maximum, and the value of noise reduction coefficient is bigger, shows noise reduction
Better, the grade of material is also higher, and materials of the usual NRC more than or equal to 0.2 is considered as just sound-absorbing material.
Embodiment 1
(1) expandability epoxy resin composition is prepared
100g NPEL-128 epoxy resin is taken, according to the proportioning in table 1, polymer expandable microspheres 031DU40 is sequentially added
(using 80～135 DEG C of temperature range), 32g polyethers amine hardener EC301, and mix, that is, obtain the mixing of expandability epoxy resin
Thing.
(2) the expandability epoxy resin composition obtained by the step of taking certain mass (1), when pre-polymerization unification section at 45 DEG C
Between (be shown in Table 1), obtain expandability epoxy prepolymer.4 hours (being shown in Table 1) of foaming under uniform temperature is subsequently placed in, epoxy resin is treated
After solidification, that is, obtain the epoxy foams material comprising open-celled structure.
Percent opening, density, compressive strength, the test result of sound absorbing capabilities, are shown in Table 1.
Table 1, the formula of the epoxy foams material of embodiment 1 and the performance test results (thickness of sample 1.2cm)
The above results show, the present composition, under different process conditions, the drop of gained epoxy foams material
Coefficient (NRC) of making an uproar can meet the requirement as sound-absorbing material application more than or equal to 0.2.
Embodiment 2
(1) expandability epoxy resin composition is prepared.
100g NPEL-128 epoxy resin is taken, 15g polymer expandable microspheres (model is shown in Table 2) is added, and is mixed, then according to
Secondary addition 50g methyl tetrahydro phthalic anhydrides, 1g altax P-30, that is, obtain expandability epoxy resin composition.
(2) the expandability epoxy resin composition 45g of step (1) acquisition is taken, prepolymerization is for a period of time under uniform temperature
(2) prepolymerized temperature and time, be shown in Table, and obtains expandability epoxy prepolymer, transfer under uniform temperature foam one section when
Between (2) temperature and time of foaming, be shown in Table, and after epoxy resin fully solidifies, obtains final product the asphalt mixtures modified by epoxy resin fat vacuole comprising open-celled structure
Foam material.
Percent opening, density, compressive strength, the test result of noise reduction coefficient, are shown in Table 2.
Table 2, the formula of the epoxy foams material of embodiment 2 and the performance test results
The above results show, in the present composition, when using different polymer expandable microspheres, and gained epoxy resin
The noise reduction coefficient (NRC) of foamed materialss can be more than or equal to 0.2, meet the requirement as sound-absorbing material application.
Embodiment 3
(1) expandability epoxy resin composition is prepared.
According to the formula of table 3, extracting epoxy resin, firming agent, polymer expandable microspheres are sequentially added, quickly stirred evenly, i.e.,
Obtain expandability epoxy resin composition.
(2) step (1) gained expandability epoxy resin composition, the prepolymerization (pre-polymerization for a period of time under uniform temperature are taken
3) temperature and time of conjunction, be shown in Table, and (3) temperature and time of foaming is shown in Table and solidifies finally to be transferred to foaming at another temperature
For a period of time, that is, the epoxy foams material comprising open-celled structure is obtained.
The formula of table 3, the epoxy foams material of embodiment 3
Percent opening, density, compressive strength, the test result of acoustic absorptivity, are shown in Table 4.
The performance test results of table 4, the correspondence formula gained epoxy foams material of embodiment 3
The above results show, in the present composition, when epoxy resin and firming agent using the different trades mark, and gained ring
The noise reduction coefficient (NRC) of oxygen resin foam can be more than or equal to 0.2, meet the requirement as sound-absorbing material application.
In sum, epoxy foams material of the present invention comprising open-celled structure, with lightweight, high intensity, noise reduction effect
Really good advantage, is highly suitable as sound-absorbing material application；Meanwhile, the preparation method of epoxy foams material of the present invention, structure
Think of is ingenious, and easy to operate, safe and environment-friendly, energy consumption is little, and low cost is especially suitable for industrialization production.
Claims (10)
1. a kind of epoxy foams material comprising open-celled structure, it is characterised in that：It includes the component of following parts by weight：
100 parts of epoxy resin, 0.5～220 part of firming agent, 1～60 part of polymer expandable microspheres.
2. epoxy foams material according to claim 1, it is characterised in that：It is by the component of following parts by weight
Composition：100 parts of epoxy resin, 0.5～220 part of firming agent, 1～60 part of polymer expandable microspheres.
3. epoxy foams material according to claim 2, it is characterised in that：It is by the component of following parts by weight
Composition：100 parts of epoxy resin, 0.5～220 part of firming agent, 2～30 parts of polymer expandable microspheres；Preferably, it is by following heavy
The component composition of amount number：100 parts of epoxy resin, 0.5～220 part of firming agent, 2～5 parts of polymer expandable microspheres.
4. the epoxy foams material according to claims 1 to 3 any one, it is characterised in that：
Described epoxy resin is selected from glycidyl ether type epoxy resin, glycidyl ester epoxy resin, (+)-2,3-Epoxy-1-propanol amine
In epoxy resin, aliphatic epoxy resin, cycloaliphatic epoxy resin any one or it is two or more；
The firming agent is selected from polyether amine firming agent, polyamide-based firming agent, imidazole curing agent, amine curing agent, anhydride
Class firming agent, carboxylic acidss firming agent, organic hydrazides firming agent, dicy-curing agent, phenolic firming agent, the solidification of aniline formaldehyde class
In agent, polyesters firming agent, polyurethaness firming agent, polysulfide class firming agent any one or it is two or more；
The use temperature of the polymer expandable microspheres is 80～235 DEG C.
5. the epoxy foams material according to claims 1 to 3 any one, it is characterised in that：The epoxy resin
The percent opening of foam is 8%～85%；The density of the epoxy foams is 0.05～0.9g/cm3。
6. the epoxy foams material according to claims 1 to 3 any one, it is characterised in that：The epoxy resin
The compressive strength of foam is 1～60MPa.
7. a kind of method for preparing epoxy foams material described in claim 1～6 any one, it is characterised in that：It is wrapped
Include following steps：
1., extracting epoxy resin, firming agent and polymer expandable microspheres, mix, and obtain expandability epoxy resin composition；
2. step 1. gained expandability epoxy resin composition, is taken, prepolymerization, foaming, solidification obtains final product epoxy foams material
Material.
8. method according to claim 7, it is characterised in that：Step 2. in, prepolymerized temperature be 15～160 DEG C, when
Between be 0～12h, the temperature of foaming is 50～200 DEG C, the time is 1～12h；Preferably, prepolymerized temperature be 15～45 DEG C,
Time is 0～1.5h, and the temperature of foaming is 80～130 DEG C, the time is 1～12h.
9. purposes of the epoxy foams material as sound-absorbing material described in claim 1～6 any one.
10. purposes according to claim 9, it is characterised in that：Described sound-absorbing material is sound absorbent for building.
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| CN201610947122.0A CN106633634A (en) | 2016-10-26 | 2016-10-26 | Epoxy resin foam material containing perforated structure and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218418A (en) * | 2019-06-26 | 2019-09-10 | 美瑞新材料股份有限公司 | A kind of lightweight epoxy resin composite material, preparation method and application |
| CN110819073A (en) * | 2019-11-25 | 2020-02-21 | 飞依诺科技(苏州)有限公司 | Backing material, preparation method thereof and ultrasonic probe |
| CN113061284A (en) * | 2021-03-24 | 2021-07-02 | 中国科学院深圳先进技术研究院 | Light organic composite material and preparation method thereof |
| CN114103338A (en) * | 2021-10-27 | 2022-03-01 | 成都金发科技新材料有限公司 | Light automobile sound insulation structure and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004168928A (en) * | 2002-11-21 | 2004-06-17 | Iida Sangyo Kk | Highly rust preventive adhesive composition for structure and method of bonding |
| CN101233167A (en) * | 2005-07-01 | 2008-07-30 | Sika技术股份公司 | Solid thermally expansible material |
| CN101985512A (en) * | 2010-02-23 | 2011-03-16 | 国家复合改性聚合物材料工程技术研究中心 | Physically expandable microsphere epoxy foaming material and preparation method thereof |
| CN102176309A (en) * | 2010-12-30 | 2011-09-07 | 汉得利（常州）电子有限公司 | Acoustic insulating material for ultrasonic sensor and preparation method thereof |
| CN103992620A (en) * | 2014-05-29 | 2014-08-20 | 贵州凯科特材料有限公司 | Microcellular foaming epoxy resin matrix material with high performance and preparation method thereof |
| CN105566857A (en) * | 2016-03-10 | 2016-05-11 | 四川大学 | Light-weight epoxy resin composite material and preparation method thereof |
-
2016
- 2016-10-26 CN CN201610947122.0A patent/CN106633634A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004168928A (en) * | 2002-11-21 | 2004-06-17 | Iida Sangyo Kk | Highly rust preventive adhesive composition for structure and method of bonding |
| CN101233167A (en) * | 2005-07-01 | 2008-07-30 | Sika技术股份公司 | Solid thermally expansible material |
| CN101985512A (en) * | 2010-02-23 | 2011-03-16 | 国家复合改性聚合物材料工程技术研究中心 | Physically expandable microsphere epoxy foaming material and preparation method thereof |
| CN102176309A (en) * | 2010-12-30 | 2011-09-07 | 汉得利（常州）电子有限公司 | Acoustic insulating material for ultrasonic sensor and preparation method thereof |
| CN103992620A (en) * | 2014-05-29 | 2014-08-20 | 贵州凯科特材料有限公司 | Microcellular foaming epoxy resin matrix material with high performance and preparation method thereof |
| CN105566857A (en) * | 2016-03-10 | 2016-05-11 | 四川大学 | Light-weight epoxy resin composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 卞军 蔺海兰: "《塑料成型原理及工艺》", 31 August 2015 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218418A (en) * | 2019-06-26 | 2019-09-10 | 美瑞新材料股份有限公司 | A kind of lightweight epoxy resin composite material, preparation method and application |
| CN110819073A (en) * | 2019-11-25 | 2020-02-21 | 飞依诺科技(苏州)有限公司 | Backing material, preparation method thereof and ultrasonic probe |
| WO2021103876A1 (en) * | 2019-11-25 | 2021-06-03 | 飞依诺科技(苏州)有限公司 | Backing material and manufacturing method therefor, and ultrasonic probe |
| CN113061284A (en) * | 2021-03-24 | 2021-07-02 | 中国科学院深圳先进技术研究院 | Light organic composite material and preparation method thereof |
| CN113061284B (en) * | 2021-03-24 | 2023-03-14 | 中国科学院深圳先进技术研究院 | Light organic composite material and preparation method thereof |
| CN114103338A (en) * | 2021-10-27 | 2022-03-01 | 成都金发科技新材料有限公司 | Light automobile sound insulation structure and preparation method and application thereof |
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Application publication date: 20170510 |