Sisal hemp glass fiber composite reinforced organosilicone modified phenolic aldehyde molding material and preparation method thereof
A technology of phenolic molding compound and glass fiber, which is applied in the field of organosilicon-modified phenolic molding compound and its preparation, can solve the problems of difficult long-term storage of phenolic molding compound, and achieve improved water absorption and weather resistance, good toughness and insulation performance , the effect of small energy consumption
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preparation example 1
[0042] (1) Preparation of organosilicon modifier: Add eugenol (164kg, 1000mol) and 15g of chloroplatinic acid into a synthesis reaction kettle, stir and heat up to 55-65°C, and 1,1,3,3-tetramethyldi Siloxane (67kg, 500mol) is added dropwise into the reactor in batches to keep the temperature not higher than 80°C, and the reaction proceeds until the end of the temperature rise phenomenon and then continues for 2-3 hours to make a silicone modifier. The structural formula and nuclear magnetic spectrum of the silicon modifier are as follows figure 1 As shown, the productive rate is 93%, and the structural formula and nuclear magnetic spectrum of this organosilicon modifier are as follows figure 1 shown.
[0043] (2) Preparation of organosilicon-modified thermoplastic phenolic resin: Add 80kg of phenol and 10kg of organosilicon modifier prepared by the above method into the synthesis reaction kettle, heat up and stir, add appropriate amount of oxalic acid to adjust the pH<2, and ...
preparation example 2
[0046] (1) Preparation of organosilicon modifier: Add eugenol (82kg, 500mol) and 9g of chloroplatinic acid into the synthesis reaction kettle, stir and heat up to 55-65°C, and 1,1,3,3-tetramethyldi Siloxane (33.5kg, 250mol) was added dropwise into the reaction kettle in batches, keeping the temperature not higher than 80°C, and the reaction continued for 2-3 hours after the end of the heating phenomenon, and then the organosilicon modifier was prepared. Yield 94%.
[0047] (2) Preparation of organosilicon-modified thermoplastic phenolic resin: add 100kg of phenol and 10kg of organosilicon modifier prepared by the above method to the synthesis reaction kettle, add oxalic acid to adjust the pH of the system to about 2, heat up and stir, and the temperature rises to about Add 55 kg of 37% formaldehyde solution dropwise at 85°C and keep it warm for 2 hours until the system becomes turbid, then vacuumize and dehydrate under reduced pressure under heating until the system temperatur...
preparation example 3
[0050] (1) Preparation of organosilicon modifier: Add 2-allylphenol (133kg, 1000mol) and 15g of chloroplatinic acid into the synthesis reaction kettle, stir and heat up to 55-65°C, and mix 1,1,3,3- Tetramethyldisiloxane (67kg, 500mol) is added dropwise into the reactor in batches to keep the temperature not higher than 80°C, and the reaction is carried out until the end of the heating phenomenon, and then continues for 2-3 hours, and then the organosilicon modification is made. agent, the yield was 91%.
[0051] (2) Preparation of organosilicon-modified thermoplastic phenolic resin: add 80kg of phenol and 10kg of organosilicon modifier prepared by the above method to the synthesis reaction kettle, add oxalic acid to adjust the pH of the system to about 2, heat up and stir, and the temperature rises to about Add dropwise 45 kg of 37% by mass formaldehyde solution at 85°C and keep it warm for 2 hours until the system becomes turbid, then vacuumize and dehydrate under reduced pre...
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