CN103980851B - Brake shoe adhesive resin used for rail transit vehicles, and preparation method thereof - Google Patents
Brake shoe adhesive resin used for rail transit vehicles, and preparation method thereof Download PDFInfo
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- CN103980851B CN103980851B CN201310482678.3A CN201310482678A CN103980851B CN 103980851 B CN103980851 B CN 103980851B CN 201310482678 A CN201310482678 A CN 201310482678A CN 103980851 B CN103980851 B CN 103980851B
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Abstract
The invention discloses a brake shoe adhesive resin used for rail transit vehicles, and a preparation method thereof. The brake shoe adhesive resin is obtained via combined modification of phenolic resin with cashew nut shell oil and molybdic acid. Impact strength of the modified brake shoe adhesive resin used for rail transit vehicles ranges from 4.7 to 6.3kJ/m<2>; thermal decomposition temperature ranges from 495 to 520 DEG C; the modified brake shoe adhesive resin possesses relatively high high-temperature resistance and flexibility, and is capable of prolonging service life and replacement cycle of brake shoes, ensuring stability, safety, and long-time running reliability of rail transit, and reducing running cost.
Description
Technical field
The present invention relates to a kind of preparation method of tackiness agent of brake shoe of rail traffic vehicles, particularly relate to a kind of Jin Shu Molybdenum compound and cashew nut shell oil of adopting to the brake shoe binding resin of the rail traffic vehicles of the combined modified preparation of resol.
Background technology
Synthesis subway Special gate watt take great friction coefficient as the functional high-polymer matrix material of feature, is rail traffic vehicle braking device major parts, directly affect comfortable, the steady and brake safe of train operation, effective.Matrix resin is crucial tackiness agent during brake shoe is produced, and generally adopt universal resol when traditional technology produces this series products, its shortcoming is that resistance to elevated temperatures is poor, and heat decomposition temperature is only 420 DEG C; And fragility is comparatively large, shock strength is 2.4KJ/m
2, goods easily because of enormous impact power during bullet train snub, and produce that instantaneous high-temperature causes resin heat fading decomposition, brake shoe sheet is cracked and cause drift stop to lose efficacy, to safe train operation generation hidden danger thus.
Summary of the invention
An object of the present invention is poor in order to solve above-mentioned universal resol resistance to elevated temperatures, and heat decomposition temperature is only 420 DEG C, and fragility is comparatively large, and shock strength is only 2.4KJ/m
2there is provided a kind of high tenacity, resistant to elevated temperatures rail traffic vehicles brake shoe binding resin etc. technical problem, its final heat decomposition temperature can reach 495-520 DEG C, and shock strength is 4.7-6.3KJ/m
2.
Two of object of the present invention is to provide the preparation method of above-mentioned a kind of rail traffic vehicles brake shoe binding resin.
Know-why of the present invention
Cashew nut shell oil (CNSL) is a kind of important crude benzene phenolic compound, derive from primary growth in the lacquer tree fruit shell of South India, it is the liquid of vicidity extracting from the cashew nut shell of maturation and obtain, its primary structure be between the monoene of band 15 carbon or the phenol of diolefin long-chain on position, therefore the feature of the existing phenolic compound of CNSL, there is again the flexibility of fatty compounds, can self-plasticizing action be played, improve the toughness of resol.Cashew nut oil modified alkyd resin is used for friction materials, frictional behaviour is excellent, the charing film softness that in friction process, surface is formed and flexible difficult drop-off, make the composition of friction material surface and febrile state even, ensure stable frictional behaviour, but the thermotolerance of CNSL aliphatic side chains to resin there is certain influence.
In phenolic resin, introduce molybdenum, can improve the thermotolerance of resin, especially instantaneous resistance to elevated temperatures, heat decomposition temperature reaches 550 DEG C, and better than ammonia phenolic aldehyde, barium phenolic aldehyde, its charring rate is also high.Along with the increase of molybdenum content in resin, resin heat decomposition temperature improves, and can be used as high-temperature ablative material, friction materials and sizing agent etc.
The present invention is intended to prepare a kind of cashew nut shell oil and molybdic acid double-modification phenolic resin, utilizes high temperature resistant, the ablation resistance of the high strength of cashew nut shell oil, high tenacity and molybdic acid, to meet the properties requirement of modern railway transportation Solution for Composition Brake Shoe binding resin.
Technical scheme of the present invention
A kind of rail traffic vehicles brake shoe binding resin, namely adopts molybdic acid and cashew nut shell oil carry out combined modified to resol and obtain.
The preparation method of above-mentioned a kind of rail traffic vehicles brake shoe binding resin, specifically comprises the steps:
(1), join in container by cashew nut shell oil, phenol, molybdic acid, control mixing speed is 300-800r/min, and temperature is 65-70 DEG C and carries out reaction 30-60min, obtains reaction solution 1;
(2) add formaldehyde and catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 95-100 DEG C carry out back flow reaction 110-120min, obtain reaction solution 2;
Described catalyzer 1 is H
2sO
4and H
3pO
4mixture, H
2sO
4and H
3pO
4mass ratio be 1:3;
(3), by the reaction solution 2 of step (2) gained be cooled to 70-80 DEG C, add catalyzer 2, stir 20-30min, be then warming up to 100 DEG C, normal pressure dehydration 30-40min; Then be warming up to 125-130 DEG C, carry out vacuum hydro-extraction 40-60min, vacuum degree control is 3-5mmHg, while hot discharging, obtains rail traffic vehicles brake shoe binding resin;
Described catalyzer 2 is NaOH and BaSO
4mixture, NaOH and BaSO
4mass ratio be 1:1;
The amount of cashew nut shell oil used in above-mentioned preparation process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4-27.8%:33.4-38.6%:4.8-6.1%:30.3-32.7%:1.0-1.2%:1.2%-1.4%.
Beneficial effect of the present invention
The present invention relates to a kind of rail traffic vehicles brake shoe binding resin, due to adopt Jin Shu Molybdenum compound and cashew nut shell oil combined modified to resol, because the cashew nut shell oil adopted carries out intrinsic toughening effect to resol, improve the toughness of resol, modified resol shock strength is by 2.4KJ/m
2bring up to 4.7-6.3KJ/m
2; Meanwhile, the molybdic acid compound of employing, molybdenum atom is introduced in phenolic resin structure the thermotolerance of the rail traffic vehicles brake shoe binding resin that improve final gained, especially instantaneous resistance to elevated temperatures, therefore heat decomposition temperature brings up to 495-520 DEG C by 420 DEG C.
In sum, the present invention adopts a kind of Jin Shu Molybdenum compound and cashew nut shell oil of adopting to the rail traffic vehicles brake shoe binding resin of the combined modified preparation of resol, it has higher toughness and resistance to elevated temperatures, work-ing life and the replacement cycle of brake block can be extended, ensure that track traffic is stablized, the reliability of safety and long-time running, and reduce running cost, modern railway transportation vehicle brake shoe can be met to the requirement of binding agent.
Specific embodiments
Below by specific embodiment, the present invention is set forth further, but it does not limit the scope of the invention.
embodiment 1
A kind of rail traffic vehicles brake shoe binding resin, is prepared from by the method specifically comprised the steps:
(1), join in container by 22.4g cashew nut shell oil, 38.6g phenol, 4.8g molybdic acid, control mixing speed is 300r/min, and temperature of reaction is 65 DEG C, and reaction 30min, obtains reaction solution 1;
(2) add 31.8g formaldehyde and 1.2g catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 98 DEG C, back flow reaction 110min, obtain reaction solution 2;
Described catalyzer 1 is catalyzer 1 is H
2sO
4and H
3pO
4mixture, wherein H
2sO
4and H
3pO
4mass ratio be 1:3;
(3), by the reaction solution 2 of step (2) gained be cooled to 75 DEG C, add 1.2g catalyzer 2, stir 20min, be then warming up to 100 DEG C, normal pressure dehydration 40min; Then be warming up to 130 DEG C, carry out vacuum hydro-extraction 40min, vacuum degree control is 3mmHg, while hot discharging, obtains brake shoe binding resin;
Described catalyzer 2 is NaOH and BaSO
4mixture, NaOH and BaSO
4mass ratio be 1:1;
The amount of cashew nut shell oil used in above-mentioned preparation process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4%:38.6%:4.8%:31.8%:1.2%:1.2%.
The rail traffic vehicles brake shoe binding resin of above-mentioned gained, measure through Charpy strength testing machine (material tests company limited, model ZBC-1400-2 are newly thought carefully in Shenzhen), its shock strength is 5.4KJ/m
2.
The rail traffic vehicles brake shoe binding resin of above-mentioned gained, through thermal gravimetric analyzer (the Pyris Diamond TG-DSC that PerkinElmer instrument company of the U.S. produces), be 10 DEG C/min at temperature rise rate, nitrogen atmosphere, flow is measure under the condition of 20mL/min, and its heat decomposition temperature is 495 DEG C.
Therefore, the rail traffic vehicles brake shoe binding resin of above-mentioned gained has excellent comprehensive performance, and its toughness and resistance to elevated temperatures adapt to the brake request of track train high-speed overload.
embodiment 2
A kind of rail traffic vehicles brake shoe binding resin, is prepared from by the method specifically comprised the steps:
(1), join in container by 22.4g cashew nut shell oil, 37.3g phenol, 5.2g molybdic acid, control mixing speed is 500r/min, and temperature of reaction is 70 DEG C, and reaction 45min, obtains reaction solution 1;
(2) add 32.7g formaldehyde and 1.0g catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 100 DEG C, back flow reaction 120min, obtain reaction solution 2;
Described catalyzer 1 is catalyzer 1 is H
2sO
4and H
3pO
4mixture, wherein H
2sO
4and H
3pO
4mass ratio be 1:3;
(3), by the reaction solution 2 of step (2) gained be cooled to 70 DEG C, add 1.4g catalyzer 2, stir 30min, be then warming up to 100 DEG C, normal pressure dehydration 30min; Then be warming up to 125 DEG C, carry out vacuum hydro-extraction 60min, vacuum degree control is 3mmHg, while hot discharging, obtains brake shoe binding resin;
Described catalyzer 2 is NaOH and BaSO
4mixture, NaOH and BaSO
4mass ratio be 1:1;
The amount of cashew nut shell oil used in above-mentioned preparation process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4%:37.3%:5.2%:32.7%:1.0%:1.4%.
The rail traffic vehicles brake shoe binding resin of above-mentioned gained, measure through Charpy strength testing machine (material tests company limited, model ZBC-1400-2 are newly thought carefully in Shenzhen), its shock strength is 4.7KJ/m
2.
The rail traffic vehicles brake shoe binding resin of above-mentioned gained, through thermal gravimetric analyzer (the Pyris Diamond TG-DSC that PerkinElmer instrument company of the U.S. produces), be 10 DEG C/min at temperature rise rate, nitrogen atmosphere, flow is measure under the condition of 20mL/min, and its heat decomposition temperature is 510 DEG C.
Therefore, the rail traffic vehicles brake shoe binding resin of above-mentioned gained has excellent comprehensive performance, and its toughness and resistance to elevated temperatures adapt to the brake request of track train high-speed overload.
embodiment 3
A kind of rail traffic vehicles brake shoe binding resin, is prepared from by the method specifically comprised the steps:
(1), join in container by 27.8g cashew nut shell oil, 33.4g phenol, 6.1g molybdic acid, control mixing speed is 800r/min, and temperature of reaction is 70 DEG C, and reaction 60min, obtains reaction solution 1;
(2) add 30.3g formaldehyde and 1.1g catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 100 DEG C, back flow reaction 120min, obtain reaction solution 2;
Described catalyzer 1 is catalyzer 1 is H
2sO
4and H
3pO
4mixture, wherein H
2sO
4and H
3pO
4mass ratio be 1:3;
(3), by the reaction solution 2 of step (2) gained be cooled to 80 DEG C, add 1.3g catalyzer 2, stir 30min, be then warming up to 100 DEG C, normal pressure dehydration 30min; Then be warming up to 125 DEG C, carry out vacuum hydro-extraction 60min, vacuum degree control is 5mmHg, while hot discharging, obtains brake shoe binding resin;
Described catalyzer 2 is NaOH and BaSO
4mixture, NaOH and BaSO
4mass ratio be 1:1;
The amount of cashew nut shell oil used in above-mentioned preparation process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 27.8%:33.4%:6.1%:30.3%:1.1%:1.3%.
The rail traffic vehicles brake shoe binding resin of above-mentioned gained, measure through Charpy strength testing machine (material tests company limited, model ZBC-1400-2 are newly thought carefully in Shenzhen), its shock strength is 6.3KJ/m
2.
The rail traffic vehicles brake shoe binding resin of above-mentioned gained, through thermal gravimetric analyzer (the Pyris Diamond TG-DSC that PerkinElmer instrument company of the U.S. produces), be 10 DEG C/min at temperature rise rate, nitrogen atmosphere, flow is measure under the condition of 20mL/min, and its heat decomposition temperature is 520 DEG C.
Therefore, the rail traffic vehicles brake shoe binding resin of above-mentioned gained has excellent comprehensive performance, and its toughness and resistance to elevated temperatures adapt to the brake request of track train high-speed overload.
The above is only the concrete example of embodiments of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (5)
1. a rail traffic vehicles brake shoe binding resin, it is characterized in that described rail traffic vehicles brake shoe binding resin carries out combined modified by cashew nut shell oil and molybdic acid to resol, its modifying process specifically comprises the steps:
(1), join in container by cashew nut shell oil, phenol, molybdic acid, control mixing speed is 300-800r/min, and temperature is 65-70 DEG C and carries out reaction 30-60min, obtains reaction solution 1;
(2) add formaldehyde and catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 95-100 DEG C carry out back flow reaction 110-120min, obtain reaction solution 2;
Described catalyzer 1 is H
2sO
4and H
3pO
4mixture, H
2sO
4and H
3pO
4mass ratio be 1:3;
(3), by the reaction solution 2 of step (2) gained be cooled to 70-80 DEG C, add catalyzer 2, stir 20-30min, be then warming up to 100 DEG C, normal pressure dehydration 30-40min; Then be warming up to 125-130 DEG C, carry out vacuum hydro-extraction 40-60min, vacuum degree control is 3-5mmHg, while hot discharging, obtains rail traffic vehicles brake shoe binding resin;
Described catalyzer 2 is NaOH and BaSO
4mixture, NaOH and BaSO
4mass ratio be 1:1;
The amount of cashew nut shell oil used in above-mentioned modifying process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4-27.8%:33.4-38.6%:4.8-6.1%:30.3-32.7%:1.0-1.2%:1.2%-1.4%.
2. a kind of rail traffic vehicles brake shoe binding resin as claimed in claim 1, is characterized in that described modifying process specifically comprises the steps:
(1), join in container by cashew nut shell oil, phenol, molybdic acid, control mixing speed is 800r/min, and temperature of reaction is 70 DEG C, and reaction 60min, obtains reaction solution 1;
(2) add formaldehyde and catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 100 DEG C, back flow reaction 120min, obtain reaction solution 2;
(3), by the reaction solution 2 of step (2) gained be cooled to 80 DEG C, add catalyzer 2, stir 30min, be then warming up to 100 DEG C, normal pressure dehydration 30min; Then be warming up to 125 DEG C, carry out vacuum hydro-extraction 60min, vacuum degree control is 5mmHg, while hot discharging, obtains brake shoe binding resin;
The amount of cashew nut shell oil used in above-mentioned preparation process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 27.8%:33.4%:6.1%:30.3%:1.1%:1.3%.
3. a kind of rail traffic vehicles brake shoe binding resin as claimed in claim 1, is characterized in that described modifying process specifically comprises the steps:
(1), join in container by cashew nut shell oil, phenol, molybdic acid, control mixing speed is 300r/min, and temperature of reaction is 65 DEG C, and reaction 30min, obtains reaction solution 1;
(2) add formaldehyde and catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 98 DEG C, back flow reaction 110min, obtain reaction solution 2;
(3), by the reaction solution 2 of step (2) gained be cooled to 75 DEG C, add catalyzer 2, stir 20min, be then warming up to 100 DEG C, normal pressure dehydration 40min; Then be warming up to 130 DEG C, carry out vacuum hydro-extraction 40min, vacuum degree control is 3mmHg, while hot discharging, obtains brake shoe binding resin;
The amount of cashew nut shell oil used in above-mentioned modifying process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4%:38.6%:4.8%:31.8%:1.2%:1.2%.
4. a kind of rail traffic vehicles brake shoe binding resin as claimed in claim 1, is characterized in that described modifying process specifically comprises the steps:
(1), join in container by cashew nut shell oil, phenol, molybdic acid, control mixing speed is 500r/min, and temperature of reaction is 70 DEG C, and reaction 45min, obtains reaction solution 1;
(2) add formaldehyde and catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 100 DEG C, back flow reaction 120min, obtain reaction solution 2;
(3), by the reaction solution 2 of step (2) gained be cooled to 70 DEG C, add catalyzer 2, stir 30min, be then warming up to 100 DEG C, normal pressure dehydration 30min; Then be warming up to 125 DEG C, carry out vacuum hydro-extraction 60min, vacuum degree control is 3mmHg, while hot discharging, obtains brake shoe binding resin;
The amount of cashew nut shell oil used in above-mentioned modifying process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4%:37.3%:5.2%:32.7%:1.0%:1.4%.
5. the preparation method of a kind of rail traffic vehicles brake shoe binding resin as claimed in claim 1, is characterized in that specifically comprising the steps:
(1), join in container by cashew nut shell oil, phenol, molybdic acid, control mixing speed is 300-800r/min, and temperature is 65-70 DEG C and carries out reaction 30-60min, obtains reaction solution 1;
(2) add formaldehyde and catalyzer 1 in the reaction solution 1, in step (1) obtained, under whipped state, be warming up to 95-100 DEG C carry out back flow reaction 110-120min, obtain reaction solution 2;
Described catalyzer 1 is H
2sO
4and H
3pO
4mixture, calculate in mass ratio, wherein H
2sO
4: H
3pO
4for 1:3;
(3), by the reaction solution 2 of step (2) gained be cooled to 70-80 DEG C, add catalyzer 2, stir 20-30min, be then warming up to 100 DEG C, normal pressure dehydration 30-40min; Then be warming up to 125-130 DEG C, carry out vacuum hydro-extraction 40-60min, vacuum degree control is 3-5mmHg, while hot discharging, obtains rail traffic vehicles brake shoe binding resin;
Described catalyzer 2 is NaOH and BaSO
4mixture, NaOH and BaSO
4mass ratio be 1:1;
The amount of cashew nut shell oil used in above-mentioned modifying process, phenol, molybdic acid, formaldehyde, catalyzer 1 and catalyzer 2, calculate by mass percentage, i.e. cashew nut shell oil: phenol: molybdic acid: formaldehyde: catalyzer 1: catalyzer 2 is 22.4-27.8%:33.4-38.6%:4.8-6.1%:30.3-32.7%:1.0-1.2%:1.2%-1.4%.
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|---|---|---|---|
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|---|---|---|---|
| CN201310482678.3A CN103980851B (en) | 2013-10-16 | 2013-10-16 | Brake shoe adhesive resin used for rail transit vehicles, and preparation method thereof |
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| CN103980851B true CN103980851B (en) | 2015-05-20 |
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| CN105622872B (en) * | 2014-12-15 | 2018-07-24 | 彤程化学（中国）有限公司 | A kind of cashew nut oil modified novolac resin and its preparation method and application |
| CN105176463B (en) * | 2015-08-06 | 2017-12-26 | 安徽铭源新型建材科技有限公司 | A kind of wallboard of the good excellent in mechanical performance of heat-resistant bonded property |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515600A (en) * | 2003-01-02 | 2004-07-28 | 杨志敏 | Method for making modified phenol-formaldehyde resin and adhesive containing said resin |
| CN102516911A (en) * | 2011-12-14 | 2012-06-27 | 黄石金朝阳粉末材料有限责任公司 | Modified phenolic resin adhesive for friction material and preparation method for modified phenolic resin adhesive |
| CN102604571A (en) * | 2011-01-19 | 2012-07-25 | 上海壬丰复合材料有限公司 | Adhesive used for brake shoe for urban rail transit and its manufacturing method |
-
2013
- 2013-10-16 CN CN201310482678.3A patent/CN103980851B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1515600A (en) * | 2003-01-02 | 2004-07-28 | 杨志敏 | Method for making modified phenol-formaldehyde resin and adhesive containing said resin |
| CN102604571A (en) * | 2011-01-19 | 2012-07-25 | 上海壬丰复合材料有限公司 | Adhesive used for brake shoe for urban rail transit and its manufacturing method |
| CN102516911A (en) * | 2011-12-14 | 2012-06-27 | 黄石金朝阳粉末材料有限责任公司 | Modified phenolic resin adhesive for friction material and preparation method for modified phenolic resin adhesive |
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