CN104974464A - Methods for preparing molybdenum modified phenolic resin and preparing friction material from molybdenum modified phenolic resin - Google Patents
Methods for preparing molybdenum modified phenolic resin and preparing friction material from molybdenum modified phenolic resin Download PDFInfo
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- CN104974464A CN104974464A CN201410134659.6A CN201410134659A CN104974464A CN 104974464 A CN104974464 A CN 104974464A CN 201410134659 A CN201410134659 A CN 201410134659A CN 104974464 A CN104974464 A CN 104974464A
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Abstract
The invention discloses methods for preparing molybdenum modified phenolic resin and preparing a friction material from the molybdenum modified phenolic resin, and belongs to the technical fields of phenolic resin and friction materials. The methods mainly solve the problem of low heat resistance of the existing phenolic resin or the friction material prepared from the phenolic resin. The method is mainly characterized by comprising the steps of grinding a molybdenum modifier into powder; directly mixing the molybdenum modifier powder with phenolic resin powder uniformly; and finally, curing the uniformly mixed molybdenum modifier powder and phenolic resin powder to obtain the molybdenum modified phenolic resin, wherein the molybdenum modifier powder is 5-25% of the phenolic resin powder by mass. The friction material prepared from the molybdenum modified phenolic resin has stable friction coefficient and high heat resistance. The methods are mainly used for improving the heat resistance of the modified phenolic resin and the friction material prepared from the molybdenum modified phenolic resin.
Description
Technical field
The invention belongs to resol and friction materials technology field.Be specifically related to a kind of method preparing molybdenum modified phenolic resins, and prepare the method for friction materials by this molybdenum modified phenolic resins.
Background technology
Friction materials is a kind of matrix material, primarily of the various ingredients such as resin matrix, frictional property regulator, fiber reinforced material and filler mixing, hot-forming and make.Generally should have the features such as good frictional coefficient, abrasion resistance properties and resistance toheat, be the braking of various transport facility and mechanical means and the critical material of drive disk assembly.
Resin matrix is an important component of friction materials, and its performance directly affects abrasion resistance properties, the snappiness and thermostability etc. of friction materials.Due to resol resistance toheat and better mechanical property, raw material be cheaply easy to get, production technique and the plurality of advantages such as equipment is comparatively simple, it is the most basic resinous principle producing friction materials always.
In the various ingredients of friction materials, resin matrix is organic materials, and other is generally inorganic materials, and therefore, resin matrix is the technology short slab of friction materials thermostability.On some mountain area road conditions, bus and high-speed overload vehicle, require the high temperature of brake facing ability more than 380 DEG C.But at present the heat decomposition temperature of the resol that friction materials is used generally lower than 350 DEG C.More than this temperature, resin occurs to decompose and causes adopting the friction materials top layer of this resin to produce decomposing, and causes frictional coefficient to produce comparatively great depression, and makes material produce higher thermal wear because of thermolysis.Brake torque is reduced, and brake pad replacing is frequent, not only affects vehicle normal operation, seriously even causes brake locking or brake failure, lead to major motor vehicle security incident.Therefore, carry out modification to resol, improve resin and make the thermotolerance of friction materials, be those skilled in the art's technical problems urgently to be resolved hurrily always.
Summary of the invention
In order to solve above technical problem, the invention provides a kind of preparation method of molybdenum modified phenolic resins, and adopt the molybdenum modified phenolic resins prepared by the method to prepare the method for friction materials, make friction materials have good resistance toheat.
The technical solution that the present invention prepares molybdenum modified phenolic resins is: a kind of preparation method of molybdenum modified phenolic resins, is characterized in that comprising the following steps: first by molybdenum properties-correcting agent grind into powder; Again this molybdenum modifier powder is directly mixed with Phenolic resin powder; Finally the molybdenum modifier powder mixed and Phenolic resin powder solidification are obtained molybdenum modified phenolic resins; Described molybdenum modifier powder is 5% ~ 25% of Phenolic resin powder by mass percentage.
The present invention prepares the preferred technical solution of molybdenum modified phenolic resins: a kind of preparation method of molybdenum modified phenolic resins, is characterized in that comprising the following steps: the powder first molybdenum properties-correcting agent being ground to form granularity≤38 μm; Again by this molybdenum modifier powder directly and Phenolic resin powder mix and blend 1.5 ~ 2.5 hours, this resol is: industrial goods, hexamethylenetetramine content 6.5-8.5%, 200 mesh sieve screenings≤5%; The baking oven finally the molybdenum modifier powder mixed and Phenolic resin powder being placed in 150 ~ 175 DEG C of temperature solidifies 2h ~ 2.5h and obtains molybdenum modified phenolic resins; Described molybdenum modifier powder is 10% ~ 15% of Phenolic resin powder by mass percentage.
The molybdenum properties-correcting agent described in technical solution that the present invention prepares molybdenum modified phenolic resins is molybdic acid, ammonium molybdate, ammonium phosphomolybdate, molybdenum chloride, molybdenum oxide or its combination.
The resol described in technical solution that the present invention prepares molybdenum modified phenolic resins is pure phenolic resin, cashew nut oil modified alkyd resin, nitrile rubber modified phenolic resin, epoxy modified phenolic, boron modified phenolic resin, melamine modified phenolic resin, Si modification resol or its combination.
The technical solution that the present invention's employing prepares friction materials by molybdenum modified phenolic resins is: a kind of method being prepared friction materials by molybdenum modified phenolic resins, it is characterized in that comprising the following steps: by mass percentage, the filler of the molybdenum modified phenolic resins of 5wt% ~ 25wt%, the frictional property regulator of 1wt% ~ 15wt%, the fiber reinforced material of 15wt% ~ 40wt% and 20wt% ~ 40wt% is mixed, through the hot-forming sample obtaining suppressing; Again the sample of this compacting is heat-treated, obtain friction materials.
The present invention's employing is prepared the preferred technical solution of friction materials by molybdenum modified phenolic resins and is: a kind of method being prepared friction materials by molybdenum modified phenolic resins, it is characterized in that comprising the following steps: by mass percentage, by the filler mix and blend 1.5 ~ 2.5 hours of the molybdenum modified phenolic resins of 20wt% ~ 25wt%, the frictional property regulator of 8wt% ~ 14wt%, the fiber reinforced material of 25wt% ~ 35wt% and 25wt% ~ 35wt%, through the hot-forming sample obtaining suppressing, hot pressing temperature 160 ~ 170 DEG C, pressure 20 ~ 28MPa, hot pressing time 20 ~ 25 minutes; Again the sample of this compacting is heat-treated, temperature 170 ~ 185 DEG C, 8 ~ 12 hours time, obtain friction materials.
Friction materials is prepared in the present invention's employing frictional property regulator described in technical solution by molybdenum modified phenolic resins is molybdenumdisulphide, graphite, mica, ferric oxide, aluminium sesquioxide or its combination; Described fiber reinforced material is glass fibre, steel fiber, aramid fiber, mineral fibre, carbon fiber or its combination; Described filler is barium sulfate, water-ground limestone, vermiculite power or its combination.
Compared with prior art, the invention provides a kind of preparation method of simple molybdenum modified phenolic resins, it can directly utilize industrial goods resol, it is mixed with molybdenum properties-correcting agent, molybdenum synchronously completes the solidification of the modification of resol and resol, technological operation is simple, and product performance are easy to control, without the need to changing the production technique of original resol.And the slitless connection with friction materials production technique can be realized, experimental result shows, and the friction materials stable friction factor adopting the molybdenum modified phenolic resins that obtains of the present invention to prepare, thermotolerance are high.The present invention is mainly used in the thermotolerance improving modified phenolic resins and be made up friction materials of this modified phenolic resins.
Accompanying drawing explanation
Fig. 1 is the thermogravimetric curve figure of modified phenolic resins.
Fig. 2 is the thermogravimetric curve figure of friction materials.
Embodiment
Below by specific embodiment, the present invention is described in further details, should be understood that following explanation is only exemplary, instead of the restriction to the claims in the present invention.
Embodiment 1:
A kind of preparation method of molybdenum modified phenolic resins, step is as follows: at nitrile rubber modified phenolic resin powder (industrial goods, hexamethylenetetramine content 6.5-8.5%, 200 mesh sieve screenings≤5%) in add 11%(massfraction) ammonium molybdate powder (granularity≤38 μm) of porphyrize, mix and blend 2 hours, the baking oven being placed in 160 DEG C of temperature solidifies 2.5 hours, obtains molybdenum modified phenolic resins.
Embodiment 2:
A kind of preparation method of molybdenum modified phenolic resins, step is as follows: at cashew nut oil modified alkyd resin powder (industrial goods, hexamethylenetetramine content 6.5-8.5%, 200 mesh sieve screenings≤5%) in add 13%(massfraction) ammonium molybdate powder (granularity≤38 μm) of porphyrize, mix and blend 2 hours, the baking oven being placed in 165 DEG C of temperature solidifies 2 hours, obtains molybdenum modified phenolic resins.
By the thermogravimetric curve of the molybdenum modified phenolic resins obtained by above-described embodiment as shown in Fig. 1 (a).
In Fig. 1, (a) is the curved line of molybdenum modified phenolic resins of the present invention; B () is the curved line of resol before modified.
Shown by thermogravimetric analysis, the resistance toheat of molybdenum modified phenolic resins of the present invention significantly improves, and its heat decomposition temperature improves about 80 DEG C of (see figure 1)s more before modified.
Embodiment 3:
A preparation method for friction materials, comprises the component of following parts by weight: molybdenum modified phenolic resins 23, molybdenumdisulphide 3, graphite 3, mica 2, ferric oxide 3, aluminium sesquioxide 2, glass fibre 10, steel fiber 5, aramid fiber 6, mineral fibre 4, carbon fiber 6, barium sulfate 22, water-ground limestone 8, vermiculite power 3; Material is pressed above proportioning mix and blend 2.5 hours; The sample suppressed is obtained through hot-forming (hot pressing temperature 165 DEG C, pressure 25MPa, hot pressing time 22 minutes); The sample of described compacting is heat-treated (temperature 180 DEG C, 10 hours time), obtain friction materials.
The thermogravimetric curve of the friction materials obtained by molybdenum modified phenolic resins is utilized as shown in Figure 2 (a) shows by above-described embodiment.
In Fig. 2, (a) utilizes the curved line of the friction materials obtained by molybdenum modified phenolic resins for the present invention; The curved line of b friction materials that () obtains for unmodified resol.
Shown by thermogravimetric analysis, the resistance toheat of the friction materials that molybdenum modified phenolic resins of the present invention obtains significantly improves, and the more unmodified sample of its heat decomposition temperature improves about 50 DEG C of (see figure 2)s.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited to above-mentioned citing.Should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some changes, remodeling, interpolation or replacement to the present invention, these changes also fall in the protection domain of the claims in the present invention.
Claims (7)
1. a preparation method for molybdenum modified phenolic resins, is characterized in that comprising the following steps: first by molybdenum properties-correcting agent grind into powder; Again this molybdenum modifier powder is directly mixed with Phenolic resin powder; Finally the molybdenum modifier powder mixed and Phenolic resin powder solidification are obtained molybdenum modified phenolic resins; Described molybdenum modifier powder is 5% ~ 25% of Phenolic resin powder by mass percentage.
2. a preparation method for molybdenum modified phenolic resins, is characterized in that comprising the following steps: the powder first molybdenum properties-correcting agent being ground to form granularity≤38 μm; Again by this molybdenum modifier powder directly and Phenolic resin powder mix and blend 1.5 ~ 2.5 hours, this resol is: industrial goods, hexamethylenetetramine content 6.5-8.5%, 200 mesh sieve screenings≤5%; The baking oven finally the molybdenum modifier powder mixed and Phenolic resin powder being placed in 150 ~ 175 DEG C of temperature solidifies 2h ~ 2.5h and obtains molybdenum modified phenolic resins; Described molybdenum modifier powder is 10% ~ 15% of Phenolic resin powder by mass percentage.
3. the preparation method of a kind of molybdenum modified phenolic resins according to claim 1 and 2, is characterized in that: described molybdenum properties-correcting agent is molybdic acid, ammonium molybdate, ammonium phosphomolybdate, molybdenum chloride, molybdenum oxide or its combination.
4. the preparation method of a kind of molybdenum modified phenolic resins according to claim 1 and 2, is characterized in that: described resol is pure phenolic resin, cashew nut oil modified alkyd resin, nitrile rubber modified phenolic resin, epoxy modified phenolic, boron modified phenolic resin, melamine modified phenolic resin, Si modification resol or its combination.
5. the method utilizing the molybdenum modified phenolic resins described in claim 1 or 2 to prepare friction materials, it is characterized in that comprising the following steps: by mass percentage, the filler of the molybdenum modified phenolic resins of 5wt% ~ 25wt%, the frictional property regulator of 1wt% ~ 15wt%, the fiber reinforced material of 15wt% ~ 40wt% and 20wt% ~ 40wt% is mixed, through the hot-forming sample obtaining suppressing; Again the sample of this compacting is heat-treated, obtain friction materials.
6. the method utilizing the molybdenum modified phenolic resins described in claim 1 or 2 to prepare friction materials, it is characterized in that comprising the following steps: by mass percentage, by the filler mix and blend 1.5 ~ 2.5 hours of the molybdenum modified phenolic resins of 20wt% ~ 25wt%, the frictional property regulator of 8wt% ~ 14wt%, the fiber reinforced material of 25wt% ~ 35wt% and 25wt% ~ 35wt%, through the hot-forming sample obtaining suppressing, hot pressing temperature 160 ~ 170 DEG C, pressure 20 ~ 28MPa, hot pressing time 20 ~ 25 minutes; Again the sample of this compacting is heat-treated, temperature 170 ~ 185 DEG C, 8 ~ 12 hours time, obtain friction materials.
7. the molybdenum modified phenolic resins that utilizes according to claim 5 or 6 prepares the method for friction materials, it is characterized in that: described frictional property regulator is molybdenumdisulphide, graphite, mica, ferric oxide, aluminium sesquioxide or its combination; Described fiber reinforced material is glass fibre, steel fiber, aramid fiber, mineral fibre, carbon fiber or its combination; Described filler is barium sulfate, water-ground limestone, vermiculite power or its combination.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867194A (en) * | 2017-04-17 | 2017-06-20 | 南通万达摩擦材料有限公司 | Automobile clutch disc |
| CN109651758A (en) * | 2018-11-06 | 2019-04-19 | 中国神华能源股份有限公司 | A kind of phenol-formaldehyde resin modified and preparation method thereof, phenol-formaldehyde resin modified plate |
| CN111410936A (en) * | 2020-04-10 | 2020-07-14 | 荆门市诺维英新材料科技有限公司 | Composite fiber high-performance friction material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585262A (en) * | 2011-12-31 | 2012-07-18 | 东营宝丰汽车配件有限公司 | Method for preparing brake pad by utilizing ceramic fiber |
| CN102660102A (en) * | 2012-05-02 | 2012-09-12 | 江苏亚邦新材料科技有限公司 | Method for preparing high-temperature resistant insulating resin and application thereof |
-
2014
- 2014-04-04 CN CN201410134659.6A patent/CN104974464A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102585262A (en) * | 2011-12-31 | 2012-07-18 | 东营宝丰汽车配件有限公司 | Method for preparing brake pad by utilizing ceramic fiber |
| CN102660102A (en) * | 2012-05-02 | 2012-09-12 | 江苏亚邦新材料科技有限公司 | Method for preparing high-temperature resistant insulating resin and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘晓洪等: "耐热性钼酚醛树脂基摩擦材料的研究", 《工程塑料应用》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106867194A (en) * | 2017-04-17 | 2017-06-20 | 南通万达摩擦材料有限公司 | Automobile clutch disc |
| CN109651758A (en) * | 2018-11-06 | 2019-04-19 | 中国神华能源股份有限公司 | A kind of phenol-formaldehyde resin modified and preparation method thereof, phenol-formaldehyde resin modified plate |
| CN109651758B (en) * | 2018-11-06 | 2021-11-30 | 中国神华能源股份有限公司 | Modified phenolic resin, preparation method thereof and modified phenolic resin plate |
| CN111410936A (en) * | 2020-04-10 | 2020-07-14 | 荆门市诺维英新材料科技有限公司 | Composite fiber high-performance friction material and preparation method thereof |
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Inventor after: Hou Qiufei Inventor after: Li Jun Inventor after: Li Benlin Inventor after: Pan Zheng Inventor before: Hou Qiufei Inventor before: Li Benlin Inventor before: Pan Zheng |
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Effective date of registration: 20160623 Address after: 441053 Xiangfan city in Hubei Province Long Road No. 296 Applicant after: Hubei University of Arts and Science Applicant after: Jujube tiger friction material Co., Ltd. Address before: 441053 Xiangfan city in Hubei Province Long Road No. 296 Applicant before: Hubei University of Arts and Science |
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