Preparation method of cardanol modified phenolic resin

A technology of phenolic resin and cardanol, applied in the field of preparation of cardanol modified phenolic resin, can solve the problems of poor cold punchability, insufficient heat resistance, etc. cost effect

Active Publication Date: 2012-02-29
HUNAN HENGYUAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing a cardanol-modified phe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: (by weight)

[0015] 8.8 parts of cardanol, 22 parts of phenol, 19.3 parts of formaldehyde, 3.0 parts of 2% sulfuric acid solution, 10 parts of ethanol, 20 parts of toluene, 20 parts of 6101# epoxy resin, 1 part of magnesium hydroxide, aluminum acetylacetonate? share.

[0016] Preparation:

[0017] (1) add the formaldehyde solution of the cardanol of formula quantity, phenol and 3 / 4 formula quantity in reactor, stir;

[0018] (2) add the sulfuric acid of formula quantity, heat up to reflux state reaction 40min, then vacuumize 50min dehydration;

[0019] (3) Cool to 65 ° C, add the remaining formaldehyde solution and then heat up to reflux, keep warm for 2 hours and evacuate until the material is transparent;

[0020] (4) Cool to 65°C, add solvent and epoxy resin and stir for 30 minutes, add aluminum acetylacetonate to adjust the gelling time to 90-120s / 180°C;

[0021] (5) Finally, add functional filler magnesium hydroxide, stir evenly, and pack.

[00...

Embodiment 2

[0023] Embodiment 2: (by weight)

[0024] 7 parts of cardanol, 20 parts of phenol, 18.6 parts of formaldehyde, 2.7 parts of 2% sulfuric acid solution, 15 parts of ethanol, 15 parts of toluene, 22.5 parts of 6101# epoxy resin, 5 parts of magnesium hydroxide, appropriate amount of aluminum acetylacetonate.

[0025] Preparation:

[0026] (1) add the formaldehyde solution of the cardanol of formula quantity, phenol and 3 / 4 formula quantity in reactor, stir;

[0027] (2) add the sulfuric acid of formula quantity, heat up to reflux state reaction 40min, then vacuumize 50min dehydration;

[0028] (3) Cool to 65 ° C, add the remaining formaldehyde solution and then heat up to reflux, keep warm for 2 hours and evacuate until the material is transparent;

[0029] (4) Cool to 65°C, add solvent and epoxy resin and stir for 30 minutes, add aluminum acetylacetonate to adjust the gelling time to 90-120s / 180°C;

[0030] (5) Finally, add functional filler magnesium hydroxide, stir evenly, a...

Embodiment 3

[0032] Embodiment 3 (by weight)

[0033] 6.2 parts of cardanol, 21.4 parts of phenol, 18.0 parts of formaldehyde, 2.4 parts of 2% sulfuric acid solution, 20 parts of ethanol, 10 parts of toluene, 25 parts of 6101# epoxy resin, 2.5 parts of magnesium hydroxide, appropriate amount of aluminum acetylacetonate.

[0034] Preparation:

[0035] (1) add the formaldehyde solution of the cardanol of formula quantity, phenol and 3 / 4 formula quantity in reactor, stir;

[0036] (2) add the sulfuric acid of formula quantity, heat up to reflux state reaction 60min, then vacuumize 50min dehydration;

[0037] (3) Cool to 65 ° C, add the remaining formaldehyde solution and then heat up to reflux, keep warm for 2 hours and evacuate until the material is transparent;

[0038] (4) Cool to 65°C, add solvent and epoxy resin and stir for 30 minutes, add aluminum acetylacetonate to adjust the gelling time to 90-120s / 180°C;

[0039] (5) Finally, add functional filler magnesium hydroxide, stir evenly...

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Abstract

The invention discloses a preparation method of cardanol modified phenolic resin. The method comprises steps that: 16 to 24 parts of phenol by weight, 5 to 9 parts of cardanol by weight and 10 to 14 parts of formaldehyde by weight are well-mixed in a reaction vessel; 2600 to 2700 parts of sulfuric acid by weight are added to the mixture, wherein the weight percentage concentration of sulfuric acid is 2%; the mixture is heated to a reflux state, and is subject to a reaction for 40 to 60min; the mixture is evacuated and the state is maintained for 40 to 50min, such that the mixture is dehydrated; the dehydrated mixture is cooled to a temperature of 65 DEG C; 4.6 to 8.6 parts of formaldehyde by weight is added to the mixture, and the mixture is heated to a reflux state; the temperature of the mixture is maintained for 2 hours, and the mixture is evacuated and dehydrated until transparent; the mixture is cooled to a temperature of 65 DEG C; 13 to 17 parts of toluene by weight, 13 to 17 parts of ethanol by weight and 20 to 25 parts of epoxy 6101# is added to the mixture, wherein the weight percentage concentration of ethanol is 95%; the mixture is stirred for 20 to 40min; aluminum acetylacetonate is added to the mixture for regulating a gel time to 90-120s/180 DEG C; when the gel time reaches 90-120s/180 DEG C, 3 to 7 parts of magnesium hydroxide by weight is added to the mixture; the mixture is well-mixed, and the obtained material is discharged. According to the invention, tung oil is completely replaced by cheap cardanol, and cardanol is subject to a reaction with formaldehyde, such that cardanol modified phenolic resin is synthesized. Therefore, cost is further reduced, and the heat resistance and cold punching performance of the material are improved.

Description

technical field [0001] The invention relates to the technical field of synthetic resin preparation, in particular to a preparation method of cardanol-modified phenolic resin. Background technique [0002] In the manufacture of phenolic paper-based copper-clad laminates, the products made of pure phenolic resins generally have to be modified due to the shortcomings of brittle and hard products, poor punching properties, high water absorption, and low electrical insulation. At present, most of them use tung oil to modify phenolic resin as the main resin of paper-based copper clad laminates. Tung oil is obtained by pressing the fruit of the tung oil tree. In recent years, due to the continuous increase in demand for tung oil, the price has continued to rise, which has brought great cost pressure to the production of copper clad laminate manufacturers. It is important to find cheap materials to replace or partially replace tung oil and reduce production costs for the productio...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08G8/10
Inventor 高禄生
Owner HUNAN HENGYUAN NEW MATERIAL TECH CO LTD
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