Synthesis process of nitrile rubber modified phenolic resin for aramid honeycomb,
A technology of nitrile rubber and phenolic resin, which is applied in the field of composite materials, can solve the problems of resin curing, difficult curing of honeycomb, and failure to meet the requirements of aramid honeycomb curing process, etc., to achieve improved flexibility, good wettability, and low catalytic activity. Effect
Examples
Embodiment 1
[0041] A kind of synthetic technique of nitrile rubber modified phenolic resin for aramid fiber honeycomb, adopts the following steps:
[0042](1) Prepare materials according to the following components and contents: 1000g of phenol, 1000g of formaldehyde of 37wt%, 20g of ammonia catalyst, 20g of carbonamide, 10g of nitrile rubber, 800g of organic solvent methanol;
[0043] (2) Heat to dissolve phenol and put it into a reaction vessel, start stirring, add nitrile rubber and stir at a constant temperature at 58°C until the nitrile rubber is completely dissolved;
[0044] (3) Add formaldehyde and catalyst and then conduct heating reaction, the temperature is controlled at 90°C, react until the reaction solution is at 150°C, the time for cross-linking and curing to occur is 120s, then cool down to 60°C;
[0045] (4) add carboxamide, continue constant temperature reaction at 60 DEG C;
[0046] (5) Use vacuum dehydration, after dehydration to 100°C, switch to normal pressure reflu...
Embodiment 2
[0050] A kind of synthetic technique of nitrile rubber modified phenolic resin for aramid fiber honeycomb, adopts the following steps:
[0051] (1) Prepare raw materials according to the following components and contents: 1000g of phenol, 1035g of formaldehyde of 37wt%, 30g of catalyst triethylamine, 25g of carbonamide, 15g of nitrile rubber, 1000g of organic solvent ethanol;
[0052] (2) Heat to dissolve phenol and put it into a reaction vessel, start stirring, add nitrile rubber and stir at a constant temperature at 58°C until the nitrile rubber is completely dissolved;
[0053] (3) Add formaldehyde and catalyst and then conduct heating reaction, the temperature is controlled at 92°C, react until the reaction solution is at 150°C, the time for cross-linking and curing to occur is 125s, and then cool down to 62°C;
[0054] (4) Add carboxamide and continue the constant temperature reaction at 62°C;
[0055] (5) Use vacuum dehydration, after dehydration to 100°C, switch to nor...
Embodiment 3
[0059] A kind of synthetic technique of nitrile rubber modified phenolic resin for aramid fiber honeycomb, adopts the following steps:
[0060] (1) Prepare raw materials according to the following components and contents: 1000g of phenol, 1380g of formaldehyde of 37wt%, 30g of catalyst triethylamine, 25g of carbonamide, 15g of nitrile rubber, 1000g of organic solvent ethanol;
[0061] (2) Heat to dissolve phenol and put it into a reaction vessel, start stirring, add nitrile rubber and stir at a constant temperature at 58°C until the nitrile rubber is completely dissolved;
[0062] (3) Add formaldehyde and catalyst and then conduct heating reaction, the temperature is controlled at 92°C, react until the reaction solution is at 150°C, the time for cross-linking and curing to occur is 125s, and then cool down to 62°C;
[0063] (4) Add carboxamide and continue the constant temperature reaction at 62°C;
[0064] (5) Use vacuum dehydration, after dehydration to 100°C, switch to nor...
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Abstract
Description
Claims
Application Information
- IPC
- C08G8/28; C08L61/14
- CPC
- C08G8/28; C08L61/14
- Inventors
- 杨金平; 薛永顺