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Light-color phenol aralkyl resin and preparation method thereof

A technology of phenol aralkyl and aralkyl, which is applied in the field of light-colored phenol aralkyl resin and its preparation, and can solve problems such as limiting the application of phenol aralkyl resin

Active Publication Date: 2013-03-06
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the phenol aralkyl resins described in the above method are all obtained under the action of high temperature and Freidel-Craft reagent, and phenol is easily oxidized under the conditions of Freidel-Craft reagent and high temperature, so that the obtained phenol aralkyl resin The resin shows dark colors such as brown, reddish brown, brown black, etc., which limits the application of phenol aralkyl resins in fields with strict requirements on appearance

Method used

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  • Light-color phenol aralkyl resin and preparation method thereof
  • Light-color phenol aralkyl resin and preparation method thereof
  • Light-color phenol aralkyl resin and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a kind of preparation method of light color phenol aralkyl resin, comprises the following steps:

[0037] A Friedel-Crafts reaction occurs between phenol and an aralkyl compound under the action of an acidic catalyst to obtain an intermediate product, and the aralkyl compound has a structure of formula (III) or formula (IV):

[0038]

[0039] R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16 are independently hydrogen, methyl or ethyl;

[0040] A reducing agent is added to the intermediate product, and a light-colored phenol aralkyl resin is obtained after an oxidation-reduction reaction occurs.

[0041]The present invention uses phenol and aralkyl compounds as raw materials, and Friedel-Crafts Reaction (Freidel-Crafts Reaction) occurs under the action of an acidic catalyst to generate intermediate products. Since the Friedel-Crafts reaction needs to be carried ou...

Embodiment 1

[0056] Mix 100g of phenol, 100g of p-xylylene dimethyl ether and 3g of dilute sulfuric acid with a mass concentration of 20%, replace with nitrogen 3 times, raise the temperature to 120°C for 3 hours under the protection of nitrogen, and then add 1.1g of 48% Neutralize the sodium hydroxide solution, then add 0.2g sodium borohydride, react at 80°C for 40 minutes, wash the obtained product with water, and distill under reduced pressure until the free phenol content is ≤0.1%, to obtain a colorless, transparent phenol aralkyl resin.

[0057] The Gardner color, softening point and free phenol content of the phenol aralkyl resin were measured, and the results are shown in Table 1. Table 1 shows the performance parameters of the phenol aralkyl resin provided by the examples and comparative examples of the present invention.

Embodiment 2

[0065] Mix 100g of phenol, 100g of biphenyl dimethyl dimethyl ether and 2g of p-toluenesulfonic acid with a mass concentration of 20%, replace with nitrogen three times, raise the temperature to 140°C for 4 hours under the protection of nitrogen, and then add 0.2g of Neutralize with 48% sodium hydroxide solution, then add 1.3g sodium dithionite, react at 60°C for 70 minutes, wash the obtained product with water, and distill under reduced pressure until the free phenol content is ≤0.1%, to obtain colorless, transparent phenol Aralkyl resins.

[0066] The Gardner color, softening point and free phenol content of the phenol aralkyl resin were measured, and the results are shown in Table 1. Table 1 shows the performance parameters of the phenol aralkyl resin provided by the examples and comparative examples of the present invention.

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Abstract

The invention provides light-color phenol aralkyl resin. The light phenol aralkyl resin has a structure shown in a formula (I) or a formula (II), and the Gardner chromaticity of the light-color phenol aralkyl resin is less than 3. The invention further provides a method for preparing the light-color phenol aralkyl resin. The method comprises the following steps of: undergoing a Friedel-Crafts reaction on phenol and an aralkyl compound under the action of an acid catalyst to obtain an intermediate product, wherein the aralkyl compound has a structure shown in a formula (III) or a formula (IV); and adding a reducing agent into the intermediate product and undergoing a redox reaction to obtain the light-color phenol aralkyl resin. The Garnder chromaticity of the light-color phenol aralkyl resin provided by the invention is less than 3, and the resin is a colorless to light yellow transparent solid. The phenol aralkyl resin provided by the invention has a light color, and is suitable for products which have strict requirements on appearances.

Description

technical field [0001] The invention belongs to the technical field of phenol aralkyl resins, in particular to a light-colored phenol aralkyl resin and a preparation method thereof. Background technique [0002] Phenol aralkyl resin is a kind of resin obtained by Freidel-Craft reaction (Freidel-Craft) with aralkyl ether or aralkyl alcohol and phenol as raw materials, which has excellent heat resistance , flame retardant, moisture resistance and electrical insulation, widely used in aviation, electronics, machinery, petrochemical and other fields. [0003] Since the Xylok resin was prepared by the British Midland Silicones company in the 1960s, phenol aralkyl resins have been widely used in the preparation of various composite materials. Composite materials based on phenol aralkyl resins have excellent moisture absorption resistance and heat resistance. Resistance, corrosion resistance, radiation resistance and high-frequency dielectric properties, it has good application pr...

Claims

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Application Information

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IPC IPC(8): C08G61/02
Inventor 唐一林李枝芳刘耀张淑娇
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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