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Long carbon chain nylon modified phenolic resin and preparation method thereof

A technology of phenolic resin and long carbon chain, which is applied in the field of long carbon chain nylon modified phenolic resin and its preparation, which can solve the problems of reduced wettability of modified resin, reduced operation safety, and consumption of solvents, etc., to stabilize the quality of phenolic resin , Avoid the effect of low devolatilization temperature and easy gelation

Active Publication Date: 2012-10-10
浙江嘉民新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will lead to problems such as high energy consumption, solvent consumption, reduced operational safety, and increased post-processing procedures during the blending process.
[0009] In short, there are some disadvantages in modifying phenolic resin with ordinary nylon. For example, ordinary nylon, especially nylon-6 and nylon-66, has strong water absorption, high melting temperature, and consumes solvent. The viscosity of the modified phenolic resin is relatively high. These not only lead to high energy consumption, high cost, and reduced operational safety in the melt blending process, but also lead to reduced wettability of the modified resin to the filler, and reduced electrical properties of the composite material.

Method used

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  • Long carbon chain nylon modified phenolic resin and preparation method thereof
  • Long carbon chain nylon modified phenolic resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Put 400g of phenol, 40g of nylon-1212 and 3g of oxalic acid into a 2L reactor, start stirring, and heat to 100°C. At this time, nylon-1212 will gradually dissolve in the phenol to form a homogeneous solution. Then, slowly add metered aqueous formaldehyde solution (37% mass fraction) dropwise with a constant pressure dropping funnel (the molar ratio of phenol to formaldehyde is 1:0.8), keep the temperature in the reactor at 94-100°C, and the dropping time is 20 -30 minutes. The reaction was continued at reflux temperature for about half an hour, and the system would reach the cloudy point of phase transition, thereby turning into a milky white turbid liquid. Finally, the reaction was continued at reflux temperature for 2 hours. Then, connect the vacuum exhaust pipe, under constant stirring, decompression devolatilization for two hours, the vacuum degree is 0-0.1MPa, then, the temperature of the system will slowly rise to 150 ℃, and continue the decompression devolatiliza...

Embodiment 2

[0026] Add 400g of phenol, 80g of nylon-1212 and 3g of oxalic acid into a 2L reactor, stir continuously, and heat to 100°C. At this time, nylon-1212 will gradually dissolve in the phenol to form a homogeneous solution. Then, slowly add metered aqueous formaldehyde solution (37% by mass) dropwise with a constant pressure dropping funnel (the molar ratio of phenol to formaldehyde is 1:0.8), the reaction temperature is 94-100°C, and the dropwise addition takes 20-30 minutes . As the reaction proceeds, the system will pass through the phase transition cloud point and become a milky white turbid liquid, and finally, continue to react at reflux temperature for 2 hours. Then, connect the vacuum pumping tube, stir constantly, decompress and devolatilize for 2 hours, the vacuum degree is 0-0.1MPa, the temperature will slowly rise to 150°C, continue to decompress and devolatilize for 1 hour, and finally discharge the material while it is hot, Nylon-1212 modified phenolic resin was obta...

Embodiment 3

[0028] Put 400g of phenol, 40g of nylon-11 and 3g of oxalic acid into a 2L reactor, stir continuously, and heat to 100°C. At this time, nylon-11 will gradually dissolve in the phenol to form a homogeneous solution. Then, slowly add metered aqueous formaldehyde solution (37% by mass) dropwise with a constant pressure dropping funnel (the molar ratio of phenol to formaldehyde is 1:0.8), keep the temperature at 94-100°C, and add dropwise for 20-30 minutes . Then, the reaction was continued for half an hour at the reflux temperature, and the system would pass through the phase change cloud point and become a milky white cloudy liquid for 2 hours. Then, connect the vacuum pumping tube, and keep stirring, devolatilize under reduced pressure for two hours, the initial vacuum degree is 0-0.1MPa, the temperature will slowly rise to 150°C, and continue to devolatilize for 1 hour, finally, release while hot Material, get nylon-11 modified phenolic resin.

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Abstract

The invention discloses long carbon chain nylon modified phenolic resin and a preparation method thereof. The method comprises the following steps of: mixing long carbon chain nylon, phenol and an acid catalyst, heating to dissolve the long carbon chain nylon, dripping aqueous solution of formaldehyde with stirring, controlling the reaction temperature to be 94-102DEG C, reacting for 2 to 5 hoursafter the dripping is finished, purifying and drying, wherein the total number of carbon atoms in two carbon chains connected by an amido bond in the long carbon chain nylon is not less than 16. The method has the advantages of improving toughness of modified phenolic resin, reducing water absorbability of the modified phenolic resin, saving energy, reducing consumption, along with mild reaction conditions, narrow molecular weight distribution and moderate viscosity of the modified phenolic resin, no special requirement on production equipment and the like, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a thermosetting resin and a modification method thereof, in particular to a long carbon chain nylon modified phenolic resin and a preparation method thereof. Background technique [0002] Phenolic resin is the first artificially synthesized polymer in a complete sense. With its excellent heat resistance, flame retardancy, mechanical strength, and low production cost, it is widely used in the manufacture of composite materials, wood adhesives, coatings, Friction materials, foam insulation materials and ablative friction materials are widely used. [0003] However, after the phenolic resin is cured, due to its high degree of crosslinking and high rigidity of the chain segment, the molded product is easy to crack and has poor toughness, which limits its application in some fields. Therefore, improving the toughness of phenolic resin and its composite materials through appropriate methods is an important problem to be solved in in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/10C08L77/00C08L77/02C08L61/10
Inventor 沈培林万金涛沈培良周大鹏万胜兵邹沈斌陈建国俞立琼
Owner 浙江嘉民新材料有限公司
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