CN106519128A - Nitrile rubber damping material with excellent damping and noise reducing performance for automobiles and preparation method thereof - Google Patents

Nitrile rubber damping material with excellent damping and noise reducing performance for automobiles and preparation method thereof Download PDF

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Publication number
CN106519128A
CN106519128A CN201610882259.2A CN201610882259A CN106519128A CN 106519128 A CN106519128 A CN 106519128A CN 201610882259 A CN201610882259 A CN 201610882259A CN 106519128 A CN106519128 A CN 106519128A
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China
Prior art keywords
parts
nitrile rubber
damping
nbr
mah
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CN201610882259.2A
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Chinese (zh)
Inventor
黄浩
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Wuhu Hongkun Auto Parts Co Ltd
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Wuhu Hongkun Auto Parts Co Ltd
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Priority to CN201610882259.2A priority Critical patent/CN106519128A/en
Publication of CN106519128A publication Critical patent/CN106519128A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • 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
    • C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L87/00—Compositions of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2387/00—Characterised by the use of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
    • C08J2423/28—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds

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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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a nitrile rubber damping material with an excellent damping and noise reducing performance for automobiles. The damping material is prepared from the following raw materials in parts by weight: 40 to 60 parts of nitrile rubber, 30 to 40 parts of chlorinated butyl rubber, 120 to 170 parts of tetrahydrofuran, 45 to 65 parts of maleic anhydride, 2 to 5 parts of benzoyl peroxide, a proper amount of ethanol, 1 to 4 parts of sodium hypophosphite hydroxide, a proper amount of xylene, 25 to 35 parts of soft wood fiber, 1 to 2 parts of stearic acid, 3 to 7 parts of carbon black, 1 to 2 parts of sulfur, and 1 to 2 parts of sulfur. According to the preparation method, maleic anhydride is grafted onto nitrile rubber, then nitrile rubber is compounded with soft wood fibers, on one aspect, the inner friction force of the movement of rubber molecule chains is enhanced, the damping performance of the material is enhanced, on the other aspect, the characteristics of soft wood fibers are used to strengthen the sound absorbing and noise reducing performance of the damping material, and thus the damping material has an excellent damping and noise reducing performance.

Description

A kind of car kits have the nitrile rubber damping material of excellent damping noise reduction effect and its Preparation method
Technical field
The invention belongs to auto parts preparation field, and in particular to a kind of car kits have the fourth of excellent damping noise reduction effect Nitrile rubber damping material and preparation method thereof.
Background technology
Damping material is that a kind of material of damping noise reduction developed in recent years can be converted into heat vibration and acoustic energy The new function material that can be dissipated, extensively applies in various plant equipment, front panel especially in the automobile seat room, car There is application at the 8-12 position such as door, car roof, car bottom plate, boot, therefore researches and develops the new of excellent combination property Efficient Damping material has become the focus of domestic and international concern.
What Tian Min, Lu et al. were delivered《The preparation and performance study of blending type wide temperature zone high damping elastomeric material》One is literary In, using having intensive pending methyl group, the chlorinated scoline of low pole to be blended with highly polar nitrile rubber in molecular structure, make Binary CIIR/NBR blend is obtained, due to sterically hindered effect big in low pole rubber structure and the pressure after vulcanization crosslinking Winding, it will increase the internal friction resistance of polar rubber strand activity, cause molecular chain movement to be obstructed, prepare wide temperature range Damping material.
In nature, cork is a kind of very excellent material of damping performance, and it is the crust product of cork tree, is had The performances such as good elasticity, sealing, heat-insulated, sound insulation, insulation, wear-resisting, corrosion resistance, protection against the tide, fire prevention, damping, can be used as ground Plate, bottle stopper and woodwind instrument sealing gasket, packaging and energy absorbing material, heat-barrier material, damping damping material etc., are a kind of many work( Can natural material.
Therefore, the present invention is grafted nitrile rubber using maleic anhydride, compounds with cork fibrous grafting then, on the one hand strengthens On the other hand the internal friction resistance of rubber molecular chain activity, the damping capacity of reinforcing material is improved using the characteristic of cork fibrous The sqouynd absorption lowering noise performance of damping material, prepares a kind of nitrile rubber damping material of damping noise reduction excellent performance.
The content of the invention
The invention aims to solve the problems, such as that existing damping material damping, sound absorbing capabilities are not enough, there is provided a kind of vapour Automobile-used nitrile rubber damping material with excellent damping noise reduction effect and preparation method thereof.
A kind of car kits have the nitrile rubber damping material of excellent damping noise reduction effect, by the raw material group of following weight portion Into：Nitrile rubber 40-60 parts, chlorinated scoline 30-40 parts, tetrahydrofuran 120-170 parts, maleic anhydride 45-65 parts, peroxide Change benzoyl 2-5 parts, appropriate amount of ethanol, hydroxide sodium hypophosphite 1-4 parts, appropriate dimethylbenzene, cork fibrous 25-35 parts, stearic acid 1-2 parts, white carbon black 3-7 parts, sulfur 1-2 parts.
Comprise the following steps that：
（1）Maleic anhydride is grafted nitrile rubber（MAH-g-NBR）Preparation：
Nitrile rubber is dissolved completely in tetrahydrofuran, maleic anhydride is added dropwise over benzoyl peroxide with Dropping funnel Mixed solution, is passed through nitrogen protection, is warming up to 60-72 DEG C, and isothermal reaction 6-9 hours go out graft product with ethanol precipitation afterwards, With washing with alcohol for several times, the graft product after washing is placed in 38-45 DEG C of vacuum drying oven and is dried, that is, obtain MAH-g-NBR, It is standby；
（2）MAH-g-NBR is grafted cork fibrous：
Dimethylbenzene, hydroxide sodium hypophosphite and step is added in the boiling flask equipped with condensing tube（1）The MAH-g- for obtaining NBR, afterwards by the abundant cork fibrous immersion mixed solution being dried, control temperature reacts 2-4 hours at 125-140 DEG C, After the completion of reaction, solvent is removed with Soxhlet extractor, dried to constant weight in 95-105 DEG C, obtain final product MAH-g-NBR grafting corks fine Dimension；
（3）Mixing：
Under the conditions of 20-30 DEG C, by step（2）The MAH-g-NBR for obtaining is grafted cork fibrous, chlorinated scoline mix homogeneously Plasticate on a mill 3-8 minutes, be subsequently adding stearic acid, white carbon black mixing 10-30 minutes, add sulfur mixing uniform afterwards, It is prepared into elastomeric compound；
（4）Sulfuration：
By step（3）7-9 hours are stood after the thin pass-out piece of resulting elastomeric compound, on vulcanizing press at 160-190 DEG C Hot press moulding vulcanizes 20-40 minutes, and a kind of automobile damping noise reduction nitrile rubber damping material is obtained.
Wherein, described cork fibrous are formed with the white softwood pulp plate mechanical dissociation of useless industrial source and dispersion, its length Distribution 2mm-3.5mm, width distribution are 34.2 μm -73.1 μm, and length-width ratio is 72.6.
Compared with prior art, the present invention has advantages below：
（1）The present invention carries out graft modification first by maleic anhydride monomer to nitrile rubber, changes the polarity of nitrile rubber, increases The internal friction resistance of additive polarity nitrile rubber strand activity, causes molecular chain movement to be obstructed, and molecule interchain frictional heat increases, Damping capacity is more excellent.
（2）There are many gauffers on cork cell wall, can greatly alleviate compression, therefore elastic return is special Good, the special cellularity of cork fibrous can weaken flat ripple and propagate in addition, enable in particular to the propagation of noise-reducing sound wave, thus soft The sound absorption properties of wood utilizes this characteristic of cork fibrous very well in the present invention, be grafted nitrile rubber using maleic anhydride（MAH-g- NBR）Cork fibrous are carried out with graft modification, the compatibility of the cork fibrous in rubber matrix is improved, subtracting for damping material is improved Shake, sqouynd absorption lowering noise performance, can be effectively improved the comfort level of environment inside car, be conducive to the physical and mental health of people.
Specific embodiment
A kind of car kits have the nitrile rubber damping material of excellent damping noise reduction effect, by the raw material group of following weight portion Into：Nitrile rubber 55, chlorinated scoline 35, tetrahydrofuran 160, maleic anhydride 60, benzoyl peroxide 4, appropriate amount of ethanol, hydrogen Oxidation sodium hypophosphite 3, appropriate dimethylbenzene, cork fibrous 31, stearic acid 2, white carbon black 4, sulfur 2.
Comprise the following steps that：
（1）Maleic anhydride is grafted nitrile rubber（MAH-g-NBR）Preparation：
Nitrile rubber is dissolved completely in tetrahydrofuran, maleic anhydride is added dropwise over benzoyl peroxide with Dropping funnel Mixed solution, is passed through nitrogen protection, is warming up to 70 DEG C, and isothermal reaction 8 hours goes out graft product with ethanol precipitation afterwards, uses second Alcohol is washed for several times, the graft product after washing is placed in 40 DEG C of vacuum drying ovens and is dried, that is, obtain MAH-g-NBR, standby；
（2）MAH-g-NBR is grafted cork fibrous：
Dimethylbenzene, hydroxide sodium hypophosphite and step is added in the boiling flask equipped with condensing tube（1）The MAH-g- for obtaining NBR, afterwards by the abundant cork fibrous immersion mixed solution being dried, control temperature is reacted 3 hours at 130 DEG C, has reacted Cheng Hou, removes solvent with Soxhlet extractor, dries to constant weight in 100 DEG C, obtains final product MAH-g-NBR grafting cork fibrous；
（3）Mixing：
Under the conditions of 24 DEG C, by step（2）The MAH-g-NBR for obtaining is grafted cork fibrous, chlorinated scoline mix homogeneously and exists Plasticate in mill 7 minutes, be subsequently adding stearic acid, white carbon black and knead 20 minutes, add sulfur mixing uniform afterwards, be prepared into mixed Refining glue；
（4）Sulfuration：
By step（3）After the thin pass-out piece of resulting elastomeric compound stand 8 hours, on vulcanizing press at 170 DEG C high temperature mould Pressure sulfuration 30 minutes, is obtained a kind of automobile damping noise reduction nitrile rubber damping material.
Wherein, described cork fibrous are formed with the white softwood pulp plate mechanical dissociation of useless industrial source and dispersion, its length Distribution 2mm-3.5mm, width distribution are 34.2 μm -73.1 μm, and length-width ratio is 72.6.
Performance test：
Prepare according to embodiment and its material is tested, it is as a result as follows：
Density：1.185g/cm3, damping performance（23 DEG C, 200HZ）：0.14, fracture elongation：593%, tensile strength： 143Mpa, resistance to ag(e)ing：4 grades, light fastness aging：4 grades, roll processability：Well.

Claims (3)

1. a kind of car kits have the nitrile rubber damping material of excellent damping noise reduction effect, it is characterised in that by following weight The raw material composition of part：Nitrile rubber 40-60 parts, chlorinated scoline 30-40 parts, tetrahydrofuran 120-170 parts, maleic anhydride 45-65 parts, benzoyl peroxide 2-5 parts, appropriate amount of ethanol, hydroxide sodium hypophosphite 1-4 parts, appropriate dimethylbenzene, cork fibrous 25- 35 parts, stearic acid 1-2 parts, white carbon black 3-7 parts, sulfur 1-2 parts.
2. a kind of car kits according to claims 1 have the nitrile rubber damping material of excellent damping noise reduction effect Preparation method, it is characterised in that comprise the following steps that：
（1）Maleic anhydride is grafted nitrile rubber（MAH-g-NBR）Preparation：
Nitrile rubber is dissolved completely in tetrahydrofuran, maleic anhydride is added dropwise over benzoyl peroxide with Dropping funnel Mixed solution, is passed through nitrogen protection, is warming up to 60-72 DEG C, and isothermal reaction 6-9 hours go out graft product with ethanol precipitation afterwards, With washing with alcohol for several times, the graft product after washing is placed in 38-45 DEG C of vacuum drying oven and is dried, that is, obtain MAH-g-NBR, It is standby；
（2）MAH-g-NBR is grafted cork fibrous：
Dimethylbenzene, hydroxide sodium hypophosphite and step is added in the boiling flask equipped with condensing tube（1）The MAH-g- for obtaining NBR, afterwards by the abundant cork fibrous immersion mixed solution being dried, control temperature reacts 2-4 hours at 125-140 DEG C, After the completion of reaction, solvent is removed with Soxhlet extractor, dried to constant weight in 95-105 DEG C, obtain final product MAH-g-NBR grafting corks fine Dimension；
（3）Mixing：
Under the conditions of 20-30 DEG C, by step（2）The MAH-g-NBR for obtaining is grafted cork fibrous, chlorinated scoline mix homogeneously Plasticate on a mill 3-8 minutes, be subsequently adding stearic acid, white carbon black mixing 10-30 minutes, add sulfur mixing uniform afterwards, It is prepared into elastomeric compound；
（4）Sulfuration：
By step（3）7-9 hours are stood after the thin pass-out piece of resulting elastomeric compound, on vulcanizing press at 160-190 DEG C Hot press moulding vulcanizes 20-40 minutes, and the nitrile rubber damping material with excellent damping noise reduction effect is obtained.
3. a kind of car kits according to claims 1,2 have the nitrile rubber damping material of excellent damping noise reduction effect Preparation method, it is characterised in that described cork fibrous be with the useless white softwood pulp plate mechanical dissociation of industrial source and dispersion and Into its length distribution range 2mm-3.5mm, width distribution are 34.2 μm -73.1 μm, and length-width ratio is 72.6.
CN201610882259.2A 2016-10-10 2016-10-10 Nitrile rubber damping material with excellent damping and noise reducing performance for automobiles and preparation method thereof Withdrawn CN106519128A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109177395A (en) * 2018-09-08 2019-01-11 佛山朝鸿新材料科技有限公司 A kind of preparation method of automobile noise reduction wheel cover inner lining material

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Publication number Priority date Publication date Assignee Title
CN102775659A (en) * 2012-07-16 2012-11-14 华南理工大学 Method for preparing wide-temperature-range high-frequency high-damping rubber materials
CN102964670A (en) * 2012-11-27 2013-03-13 南通王子家居用品有限公司 Production method of damping sound absorption material containing kapok fiber
CN103450611A (en) * 2013-08-02 2013-12-18 青岛爱尔家佳新材料有限公司 Damping material and preparation method thereof
CN103642093A (en) * 2013-11-01 2014-03-19 华南理工大学 Nitrile rubber/modified silica-gel powder blend and preparation method thereof
CN104788836A (en) * 2015-03-29 2015-07-22 安徽微威胶件集团有限公司 Preparation method of high-damping rubber material

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
CN102775659A (en) * 2012-07-16 2012-11-14 华南理工大学 Method for preparing wide-temperature-range high-frequency high-damping rubber materials
CN102964670A (en) * 2012-11-27 2013-03-13 南通王子家居用品有限公司 Production method of damping sound absorption material containing kapok fiber
CN103450611A (en) * 2013-08-02 2013-12-18 青岛爱尔家佳新材料有限公司 Damping material and preparation method thereof
CN103642093A (en) * 2013-11-01 2014-03-19 华南理工大学 Nitrile rubber/modified silica-gel powder blend and preparation method thereof
CN104788836A (en) * 2015-03-29 2015-07-22 安徽微威胶件集团有限公司 Preparation method of high-damping rubber material

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109177395A (en) * 2018-09-08 2019-01-11 佛山朝鸿新材料科技有限公司 A kind of preparation method of automobile noise reduction wheel cover inner lining material

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Application publication date: 20170322