CN1035259C - Manufacturing method for friction brake wafer with tung oil modified phenolic resin - Google Patents
Manufacturing method for friction brake wafer with tung oil modified phenolic resin Download PDFInfo
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- CN1035259C CN1035259C CN91107262A CN91107262A CN1035259C CN 1035259 C CN1035259 C CN 1035259C CN 91107262 A CN91107262 A CN 91107262A CN 91107262 A CN91107262 A CN 91107262A CN 1035259 C CN1035259 C CN 1035259C
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- tung oil
- friction brake
- phenolic resin
- brake plate
- modified phenolic
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Abstract
The present invention relates to the manufacture of a friction brake plate from tung oil modified phenolic resin, which is characterized in that the tung oil modified phenolic resin is led into the formula components of the friction brake plate to substitute phenolic resin originally used, the main performance indexes of the product of the tung oil modified phenolic resin exceed the national standard and approximate to or reach the performance indexes of a friction brake plate manufactured in America. Road performance tests indicate that the service life of the friction brake plate for an automobile is 2 to 3 times longer than that of the original brake plate of phenolic resin, tung oil modification performs the action of toughening, and the friction brake plate overcomes the inherent disadvantages of hardness, brittleness, etc. of the original product. The present invention has the advantages of strength improvement of the brake plate, service life prolongation of the brake plate, obvious economic benefits and obvious social benefits.
Description
The invention belongs to friction brake wafer with tung oil modified phenolic resin as caking agent, is the friction brake wafer field of filler maker motor vehicle with raw materials such as asbestos.
Motor vehicles, particularly automobile are existing historical for many years with the manufacturing and the application of friction brake wafer (claiming brake facing again), and at present, the friction brake wafer of production mostly is resol as caking agent both at home and abroad, makes as stopping composition with raw materials such as asbestos.Its shortcoming is the wear rate height, and particularly high temperature time wearing and tearing are more outstanding, and intensity is low, and hardness is big, poor toughness, and frangible or easy the be full of cracks, work-ing life is short, can not satisfy the requirement of user's (particularly mountain road) when driving vehicle.Through Patent Office of the People's Republic of China's literature search, 4 pieces in relevant category-B document, 1 piece of C class, U.S3438917, U.S3494884, U.S4609381, U.S4758277 and U.S3844800, none and the closely related document of the present invention (category-A), U.S3438917 is wherein arranged, relate to resol, by generating modified phenolic resins with formaldehyde reaction again behind phenol and the isobutyric aldehyde precondensation, also available oleum lini and synourin oil, tung oil carry out modification, but any embodiment or technical solution are not provided.
The objective of the invention is provides a kind of manufacture method of friction brake wafer with tung oil modified phenolic resin and the brake(-holder) block product that creates friction at the deficiencies in the prior art, it has good toughness, hardness is low, wearing and tearing are little, and be 2-3 times that former resol is made the friction brake wafer product work-ing life.
The manufacture method of friction brake wafer with tung oil modified phenolic resin provided by the invention, its starting raw material consumption (by weight) is:
Tung oil 10-60 part
100 parts of phenol
Tosic acid is in tung oil weight 0.05-0.5 part
100 parts of formaldehyde 37% aqueous solution
Polycondensation catalyst sodium hydroxide 0.1-1 part
Diluent ethanol is an amount of
With above-mentioned tung oil, the weighing respectively of the batching component of phenol and tosic acid, be added in and have agitator, in the reactor of condenser and thermometer, under agitation be warming up to 90-110 ℃, reaction times is 20-120 minute, when cooling off 50-60 ℃, alkali neutralization with equivalent, regulate PH to 8, add above-mentioned formaldehyde and polycondensation catalyst sodium hydroxide again in still, under agitation be warming up to 80-100 ℃, reaction times is 60-100 minute, be cooled to 50-60 ℃,, regulate PH to 7 with the acid neutralization, dehydration is 1-2 hour under the 0.02MPa decompression, and it is standby as required aforesaid method to be made tung oil modified phenolic resin (A stage resin) adding proper amount of diluting ethanol.
The friction catch flake products is made used recipe ingredient (by weight):
Tung oil modified phenolic resin 15-35 part
Stearic acid 1-2 part
Glass fibre 10-20 part
Asbestos 30-40 part
Barite 20-30 part
Potassium felspar sand 2-7 part
Friction powder 4-8 part
Prescription weighing by the manufacturing of friction brake(-holder) block product, stopping composition such as tung oil modified phenolic resin, asbestos, glass fibre are added in the kneader, mediate 30-80 ℃ of temperature, time 10-60 minute through the roll squeezer roll-in, temperature 50-120 ℃ time 5-8 minute, dry aftershaping under 40-100 ℃, mold temperature is 140-200 ℃, time 1-2 '/mm, pressure 30MPa, through polishing, boring is processed again, the test package warehouse-in.
The salient features that the friction brake wafer of tung oil modified phenolic resin manufacturing provided by the invention and national standard reach without the friction brake wafer of modified phenolic resins manufacturing relatively is listed as follows:
Annotate: frictional coefficient one hurdle, the test data of first row of embodiment for heating up, second row is the test data of cooling.
From showing visible friction brake wafer following characteristics are arranged with the tung oil modified phenolic resin manufacturing.
1. frictional coefficient varies with temperature for a short time, surpasses national standard, near friction brake wafer index made in U.S.A.
2. notched Izod impact strength reaches 3.59-3.7dJ/cm
2, surpassed national standard and friction brake wafer index made in U.S.A.
3. all the other every main performance index all are better than national standard.
Use without the friction brake wafer of resin modified phenol resin manufacturing from the synthetic chemical plant of the friction brake wafer of tung oil modified phenolic resin manufacturing and Chongqing and to make road test relatively, two kinds of brake(-holder) blocks are respectively applied for the result shows as follows on the same homemade Jiefang brand automobile:
1. travel with the friction brake wafer of tung oil modified phenolic resin manufacturing and also do not scrap in 3 months, and the friction brake wafer of factory's system resol manufacturing has only travelled and just scrapped in more than 20 day.
2. the be full of cracks situation of discarded slice, thin piece compares, and the friction brake wafer be full of cracks that the friction brake wafer of tung oil modified phenolic resin manufacturing does not have former resol to make is serious.
The present invention has following advantage:
1. tung oil-modified phenol formaldehyde resin replaces former resol to make the automotive friction brake(-holder) block, and its main performance index is all above national standard; Near or reached the performance index of Americanized friction brake wafer.
2. road test shows, this automotive friction brake(-holder) block be work-ing life the resol brake(-holder) block 2-3 doubly.
3. the automotive friction brake(-holder) block that tung oil-modified phenol formaldehyde resin is made has played toughness reinforcing effect really, has overcome the former shortcomings such as resol institute inherent is crisp firmly of using, and has improved braking
The intensity of sheet and work-ing life, favorable economic benefit and social benefit have been obtained.
Embodiment:
1. with 100 kilograms of phenol, 40 kilograms of tung oil, 0.4 kilogram of 50% the tosic acid aqueous solution.Add and have agitator, temperature is taken into account in the reactor of reflux exchanger, under agitation is warming up to 90-100 ℃, reacts 30-56 minute, is cooled to 50-60 ℃, adds the alkali aqueous solution neutralization with the tosic acid equivalent.Then, 100 kilograms of the formalins of adding 37% in the affixture of tung oil-modified phenol, 2.7 kilograms of the aqueous solution of polycondensation catalyst 37-38% sodium hydroxide, regulate PH to 8, under agitation, in 80-100 ℃ of reaction 60-100 minute, be cooled to 50-60 ℃, the hydrochloric acid neutralization of adding 10% is regulated PH to 7, after treating to stir as far as possible; Put the 0.02MPa decompression dehydration, add the appropriate amount of industrial alcohol dilution as required.Then, with 20 kilograms of tung oil modified phenolic resins, 1.8 kilograms of stearic acid, 15 kilograms in glass fibre, 35 kilograms in asbestos, 25 kilograms in barite, in 5 kilograms of potassium felspar sands and 5 kilograms of adding kneaders of friction powder, mediate 30-80 ℃ of temperature, time 10-60 minute, through the roll squeezer roll-in, 50-120 ℃ of roll-in temperature, time 5-8 minute, dry aftershaping under 40-100 ℃, mold temperature is 140-200 ℃, time 1-2 '/mm, pressure 30MPa, again through polishing, boring processing.The test package warehouse-in.
2. with 100 kilograms of phenol, 20 kilograms of tung oil, 0.2 kilogram of adding of 50% the tosic acid aqueous solution has agitator, temperature is taken into account in the reactor of condenser, and all the other components and synthetic manufacturing process are with embodiment 1.
3. with 100 kilograms of phenol, 30 kilograms of tung oil, 0.3 kilogram of 50% the tosic acid aqueous solution adds and has agitator, and temperature is taken into account in the reactor of condenser, and all the other components and synthetic manufacturing process are with embodiment 1.
Comparative Examples:
60 kilograms of phenol, 23.7 kilograms in formaldehyde, 1.4 kilograms of polycondensation catalyst 41% aqueous sodium hydroxide solutions, method novolak resin according to routine, identical at stopping composition, the condition that manufacturing process is identical is made the automotive friction brake(-holder) block, compares with embodiments of the invention then.
Claims (1)
1. the manufacture method of a friction brake wafer with tung oil modified phenolic resin is characterized in that the starting raw material consumption (by weight) of this method is:
Tung oil 10-60 part
100 parts of phenol
Tosic acid is in tung oil weight 0.05-0.5 part
100 parts of formaldehyde 37% aqueous solution
Polycondensation catalyst sodium hydroxide 0.1-1 part
Diluent ethanol is an amount of
With above-mentioned tung oil, the batching component of phenol and tosic acid, weighing respectively, be added in and have agitator, in the reactor of condenser and thermometer, under agitation be warming up to 90-110 ℃, reaction times is 20-120 minute, when being cooled to 50-60 ℃,, regulate pH to 8 with the alkali neutralization of equivalent, the consumption that adds above-mentioned formaldehyde and polycondensation catalyst sodium hydroxide again, under agitation be warming up to 80-100 ℃, the reaction times is 60-100 minute, be cooled to 50-60 ℃ with the acid neutralization, regulate pH to 7,0.02MPa down dehydration 1-2 hour of decompression, it is standby to add proper amount of diluting ethanol as required.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN91107262A CN1035259C (en) | 1991-08-01 | 1991-08-01 | Manufacturing method for friction brake wafer with tung oil modified phenolic resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN91107262A CN1035259C (en) | 1991-08-01 | 1991-08-01 | Manufacturing method for friction brake wafer with tung oil modified phenolic resin |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1069037A CN1069037A (en) | 1993-02-17 |
CN1035259C true CN1035259C (en) | 1997-06-25 |
Family
ID=4908617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN91107262A Expired - Fee Related CN1035259C (en) | 1991-08-01 | 1991-08-01 | Manufacturing method for friction brake wafer with tung oil modified phenolic resin |
Country Status (1)
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CN (1) | CN1035259C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1311008C (en) * | 2004-11-10 | 2007-04-18 | 中国石油化工股份有限公司 | Thermosetting resin preparing method and use thereof |
CN1313519C (en) * | 2004-08-19 | 2007-05-02 | 湖南中野高科技特种材料有限公司 | Pnenolic aldehyde aluminium foil composite sandwich board and its production process |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104235244B (en) * | 2014-08-29 | 2017-08-01 | 宁国飞鹰汽车零部件股份有限公司 | A kind of tung oil modified phenolic resin automobile brake sheet |
US10260584B2 (en) * | 2017-03-16 | 2019-04-16 | Schaeffler Technologies AG & Co. KG | Wet friction material having increased pressure cycle life |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52138592A (en) * | 1976-05-15 | 1977-11-18 | Matsushita Electric Works Ltd | Preparation of modified phenolic resins |
JPS60210616A (en) * | 1984-04-03 | 1985-10-23 | Hitachi Chem Co Ltd | Production of phenolic resin |
JPH0568419A (en) * | 1991-09-13 | 1993-03-23 | Matsuo Aizawa | Grass mower |
-
1991
- 1991-08-01 CN CN91107262A patent/CN1035259C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52138592A (en) * | 1976-05-15 | 1977-11-18 | Matsushita Electric Works Ltd | Preparation of modified phenolic resins |
JPS60210616A (en) * | 1984-04-03 | 1985-10-23 | Hitachi Chem Co Ltd | Production of phenolic resin |
JPH0568419A (en) * | 1991-09-13 | 1993-03-23 | Matsuo Aizawa | Grass mower |
Non-Patent Citations (1)
Title |
---|
《高分子化学》 林尚安等;科学出版社 1984年 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1313519C (en) * | 2004-08-19 | 2007-05-02 | 湖南中野高科技特种材料有限公司 | Pnenolic aldehyde aluminium foil composite sandwich board and its production process |
CN1311008C (en) * | 2004-11-10 | 2007-04-18 | 中国石油化工股份有限公司 | Thermosetting resin preparing method and use thereof |
Also Published As
Publication number | Publication date |
---|---|
CN1069037A (en) | 1993-02-17 |
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