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Phenolic resin modified by butyronitrile latex and anacardol and preparation technology thereof

A phenolic resin and a preparation process technology, applied in the field of phenolic resin and its preparation process, can solve the problems of difficult dispersibility, large addition amount, unsatisfactory toughening effect of a ceramic brake pad transmission belt, etc., to overcome pollution and heat resistance. and the effect of improving toughness, ensuring solubility and dispersibility

Active Publication Date: 2013-12-11
河北泽田化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrile rubber powder is added to the above-mentioned components that constitute ceramic brake pads and transmission belts, and the addition amount is relatively large; and the above-mentioned nitrile rubber powder is only physically mixed in the components, and its dispersibility is difficult to ensure. Therefore, the The toughening effect of the formed ceramic brake pads and transmission belts is not ideal; at the same time, the phenolic resin of the above-mentioned ceramic brake pads and transmission belts is produced with liquid formaldehyde, and dehydration in the later stage will generate a large amount of waste water, which requires a lot of expense , and will cause serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Start the stirring mechanism, pump 400Kg of preheated phenol into the reaction kettle under the reduced pressure of -0.06MPa~-0.08MPa, then pump 16Kg of cardanol and 80Kg of recovered acidic phenolic wastewater (PH value of 1, phenol content of 6%) into the reaction kettle, add 6.4Kg of oxalic acid to make the pH of the system 1.5, then heat up, when the temperature reaches 85°C, divide it into three times on average within 60 minutes A total of 104Kg of solid formaldehyde with a content of 96% was placed in the reaction kettle; after the formaldehyde was added, the temperature was controlled at 85°C, kept for 40 minutes, then heated to boil in 60 minutes, and kept boiling for 3.5 hours. Adjust the pH value to 7.5 with sodium oxide aqueous solution, add 24Kg of nitrile latex, dehydrate under reduced pressure to 145°C, wash the free phenol with reduced pressure steam for 4 hours, and the viscosity reaches 30 p / 170°C, then add 4Kg of EBS, and stir for 30 The phenolic resi...

Embodiment 2

[0027] Start the stirring mechanism, pump 400Kg of preheated phenol into the reaction kettle under a reduced pressure of -0.06MPa~-0.08MPa, and then pump 18Kg of cardanol and 80Kg of recovered acidic phenolic wastewater (PH Value is 1.5, phenol content is 5%) into the reaction kettle, add 6.4Kg of hydrochloric acid, adjust the pH value of the system to 2.0, then heat up, when the temperature reaches 85 ° C, divide it five times on average in 60 minutes A total of 106Kg of solid formaldehyde with a content of 96% was placed in the reaction kettle; after the formaldehyde was added, the temperature was controlled at 90°C, kept for 50 minutes, then heated to boil in 50 minutes, and kept boiling for 3.8 hours. Adjust the pH value to 7.0 with aqueous sodium hydroxide solution, add 25Kg of nitrile latex, dehydrate under reduced pressure to 145°C, wash free phenol with reduced pressure steam for 3 hours, and the viscosity reaches 25 p / 170°C, then add 4Kg of EBS, stir After 30 minutes ...

Embodiment 3

[0029] Start the stirring mechanism, pump 400Kg of preheated phenol into the reaction kettle under the reduced pressure of -0.06MPa~-0.08MPa, then pump 20Kg of cardanol and 80Kg of recovered acidic phenolic wastewater (PH Value is 4, phenol content is 4%) into the reaction kettle, add 7.0Kg of oxalic acid, make the pH value of the system at 1.0, then heat up, when the temperature reaches 85 ° C, divide it into six times on average for 60 minutes A total of 108Kg of solid formaldehyde with a content of 96% was put into the reaction kettle; after adding formaldehyde, the temperature was controlled at 86°C, kept for 40 minutes, then heated to boil in 60 minutes, and kept boiling for 4 hours. Adjust the pH value to 8 with aqueous sodium hydroxide solution, add 26Kg of nitrile latex, dehydrate under reduced pressure to 145°C, wash the free phenol with reduced pressure steam for 3.5 hours, and the viscosity reaches 28p / 170°C, then add 4Kg of EBS, and stir for 30 The phenolic resin w...

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Abstract

The invention belongs to the technical field of phenolic resin synthesis and discloses phenolic resin modified by butyronitrile latex and anacardol and a preparation technology thereof. The preparation technology comprises the following steps: a stirring mechanism is started; pre-heated phenol is pumped into a reaction kettle under a pressure reduction state; anacardol and acidic phenolic wastewater are pumped into the reaction kettle; an acid catalyst is added to enable the PH value of a system to be 1 to 2; when the reaction kettle is heated and warmed to 85 DEG C, solid formaldehyde is poured into the reaction kettle, and the temperature in the reaction kettle is controlled to be from 85 DEG C minus 2 DEG C to 85 DEG C plus 2 DEG C; heat preservation is performed for 40 minutes, and then the reaction kettle is heated slowly until boiling; the boiling state is maintained for 3.5 hours, and the PH value is adjusted to be 7 to 8 by a sodium hydroxide aqueous solution; the butyronitrile latex is added, and EBS is added for stirring and discharging after pressure reduction dehydration is performed for washing free phenol, so that modified phenolic resin is obtained.

Description

technical field [0001] The invention belongs to the technical field of synthesis of phenolic resin, and discloses a phenolic resin modified by nitrile latex and cardanol and a preparation process thereof. Background technique [0002] The main binder of brake pads is phenolic resin. As the main material, traditional phenolic resin has the defect of high brittleness, and its products also have problems such as brittleness, high noise, high heat resistance, etc., and it is difficult for the brake pads to be tough. And heat-resistant requirements. [0003] Chinese patent application Nos. 201210419521.1 and 200710092435.3, with publication numbers CN102936486A and CN101348582A, respectively disclose an automotive ceramic brake pad and its manufacturing process and a rubber composition for manufacturing a transmission belt. Nitrile rubber powder is added to the above-mentioned components that constitute ceramic brake pads and transmission belts, and the addition amount is relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/28C08L61/14C08K5/20
Inventor 刘惠长杨永信胡春红李晓贺魏占强
Owner 河北泽田化工有限公司
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