Method for preparing clutch facing through taking water soluble phenol-formaldehyde resin as adhesion agent
A technology of water-soluble phenolic resin and clutch face, which is applied in the field of preparing high-performance motor vehicle clutch face, which can solve the problems of cumbersome preparation process of modified phenolic resin, high price of powdered nitrile rubber, and increased cost, so as to enhance toughness , Improve heat resistance, increase the effect of bonding performance
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Example Embodiment
[0031] Example 1:
[0032] In this embodiment, the clutch face sheet uses a water-soluble phenolic resin solution as a binder, and the preparation method includes the following steps:
[0033] (1) Prepare water-soluble phenolic resin solution:
[0034] Add 100 parts by mass of phenol, 5 parts by mass of polyvinyl alcohol, and 5 parts by mass of NaOH into the reaction vessel, and then add 115 parts by mass of formaldehyde solution into the reaction vessel, raise the temperature to 93°C, stir and react for 40 minutes to obtain Polyvinyl alcohol-modified phenolic resin aqueous solution; stop heating, after the temperature drops below 50℃, add 4 parts by mass of nano attapulgite and 1 part by mass of micron copper powder particles into the reaction vessel and stir for 25 minutes ; Stop stirring, collect the reaction solution, place it in an ultrasonic dispersion device, control the temperature at about 40°C, and disperse ultrasonically at a frequency of 45 Hz for 90 minutes to obtain a ...
Example Embodiment
[0042] Example 2:
[0043] In this embodiment, the clutch face sheet uses a water-soluble phenolic resin solution as a binder, and the preparation method includes the following steps:
[0044] (1) Prepare the first water-soluble phenolic resin solution:
[0045] Combine 100 parts by mass of phenol, 4 parts by mass of polyvinyl alcohol and 8 parts by mass of Ba(OH) 2 Add to the reaction vessel, then add 116 parts by mass of formaldehyde solution into the reaction vessel, heat up to 90°C, stir and react for 45 minutes to obtain a polyvinyl alcohol-modified phenolic resin aqueous solution; stop heating, and wait until the temperature drops to 50°C After the following, add 2 parts by mass of nanoscale attapulgite and 1.5 parts by mass of micron copper powder particles into the reaction vessel and stir for 30 minutes; stop stirring, collect the reaction solution, and place it in an ultrasonic dispersion device, and the temperature is controlled at 45 At about ℃, ultrasonic dispersion at ...
Example Embodiment
[0053] Example 3:
[0054] In this embodiment, the clutch face sheet uses a water-soluble phenolic resin solution as a binder, and the preparation method includes the following steps:
[0055] (1) Prepare water-soluble phenolic resin solution:
[0056] Add 100 parts by mass of phenol, 6 parts by mass of polyvinyl alcohol and 6 parts by mass of NaOH into the reaction vessel, and then add 112 parts by mass of formaldehyde solution into the reaction vessel, raise the temperature to 95°C, stir and react for 48 minutes to obtain Polyvinyl alcohol modified phenolic resin aqueous solution; stop heating, after the temperature drops below 50°C, add 3 parts by mass of nano attapulgite and 1.5 parts by mass of micron copper powder particles into the reaction vessel and stir for 25 minutes ; Stop stirring, collect the reaction solution, place it in an ultrasonic dispersion device, control the temperature at about 40 ℃, and ultrasonically disperse at 45 Hz for 120 minutes to obtain a modified wa...
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