High adjacent position phenolic resin for toughness reinforcing of elastic body and method for producing the same
A technology of phenolic resin and elastomer, which is applied in the field of resin and its preparation, can solve the problems of slow curing and molding of phenolic resin, hinder the curing of phenolic resin, and increase production costs, and achieve fast curing and molding, improved dispersibility, and convenient application Effect
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Embodiment 1
[0017] In a 500ml three-necked flask equipped with a stirrer, a condenser, and a thermometer, add 200g of phenol, 10g of powdered nitrile rubber, 138g of formaldehyde, and 2g of zinc acetate, respectively, start stirring, raise the temperature to 100°C, reflux at a constant temperature for 3 hours, and add sulfuric acid Adjust the pH of the reaction system to 2.0, continue the reaction for 1 hour, and start dehydration under reduced pressure until the water content of the resin is less than 0.5% to obtain a high-ortho-position phenolic resin toughened by the elastomer in situ.
Embodiment 2
[0019] In a 500ml three-necked flask equipped with a stirrer, a condenser, and a thermometer, add 200g of phenol, 14g of powdered nitrile rubber, 138g of formaldehyde, and 2g of zinc acetate respectively, start stirring, raise the temperature to 100°C, reflux at a constant temperature for 3 hours, and add sulfuric acid Adjust the pH of the reaction system to 2.0, continue the reaction for 1 hour, and start dehydration under reduced pressure until the water content of the resin is less than 0.5% to obtain a high-ortho-position phenolic resin toughened by the elastomer in situ.
Embodiment 3
[0021] Add 200g phenol, 20g powdered nitrile rubber, 138g formaldehyde and 2g zinc acetate to a 500ml three-necked flask equipped with a stirrer, condenser, and thermometer, respectively, start stirring, raise the temperature to 100°C, reflux at a constant temperature for 3 hours, and add sulfuric acid Adjust the pH of the reaction system to 2.0, continue the reaction for 1 hour, and start dehydration under reduced pressure until the water content of the resin is less than 0.5% to obtain a high-ortho-position phenolic resin toughened by the elastomer in situ.
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