Solid thermosetting phenolic resin with core-shell structure and preparation method thereof

A technology of phenolic resin and core-shell structure, applied in the field of phenolic resin, can solve the problems of needing to be crushed, easy to soften and agglomerate, and achieve the effect of preventing softening and adhesion

Active Publication Date: 2021-01-19
ZHEJIANG HANGMO SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a solid thermosetting phenolic resin, which solves the problems that the existing solid thermosetting phenolic resin needs to be pulverized and is easy to soften and agglomerate

Method used

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  • Solid thermosetting phenolic resin with core-shell structure and preparation method thereof
  • Solid thermosetting phenolic resin with core-shell structure and preparation method thereof
  • Solid thermosetting phenolic resin with core-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 100g of hydroxymethylcellulose and 600g of water into the reaction kettle, and the temperature is raised to 90°C. After the hydroxymethylcellulose is completely dissolved, put in KH550 that accounts for 60% of the weight of hydroxymethylcellulose and stir evenly. Under the condition of 90°C, after reacting for 1 hour, the obtained product was discharged and then cooled to obtain a colloidal solution a.

[0029] Measure 600g of hot melted phenol into the reactor with a special pump, then add 775g of formaldehyde solution (34%) and 10g of ammonia solution, (in no particular order of feeding) raise the temperature to 70°C-75°C for reaction, when the system solution appears When a white liquid appears, add 60 g of the modified colloidal solution a, continue to react for 4 hours, then discharge the material, remove moisture by filtration after cooling, and freeze-dry to obtain a solid thermosetting phenolic resin.

Embodiment 2

[0031] Measure 600g of hot melted phenol into the reactor with a special pump, then add 775g of formaldehyde solution (34%) and 10g of ammonia solution, (in no particular order of feeding) raise the temperature to 70°C-75°C for reaction, when the system solution appears When a white liquid appears, add 120 g of modified protective colloid solution, continue to react for 4 hours, then discharge, remove moisture by filtration after cooling, and freeze-dry to obtain a solid thermosetting phenolic resin.

Embodiment 3

[0033] Put 100g of hydroxymethylcellulose and 600g of water into the reaction kettle, and the temperature is raised to 90°C. After the hydroxymethylcellulose is completely dissolved, add KH550 that accounts for 80% of the weight of hydroxymethylcellulose and stir evenly. Under the condition of 90° C., after reacting for 1 hour, the prepared product was discharged and then cooled to obtain a protective colloid solution b.

[0034] Measure 600g of hot melted phenol into the reactor with a special pump, then add 775g of formaldehyde solution (34%) and 10g of ammonia solution, (in no particular order of feeding) raise the temperature to 70°C-75°C for reaction, when the system solution appears When a white liquid appears, add 60 g of the modified protective colloid solution b, continue to react for 4 hours, then discharge the material, remove moisture by filtration after cooling, and freeze-dry to obtain a solid thermosetting phenolic resin.

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Abstract

The invention discloses solid thermosetting phenolic resin in a core-shell structure and a preparation method of the solid thermosetting phenolic resin. The solid thermosetting phenolic resin is granular and comprises thermosetting phenolic resin solid particles as a core, and hydrosol as a shell, wherein the external surface of the core is wrapped with the hydrosol. The preparation method comprises the steps of: (1) preparing a colloidal solution, (2) mixing formaldehyde, phenol and a basic catalyst for a temperature reaction, and (3) when reaction liquid is white, feeding the colloidal solution, continuing to stir for reaction, and after the reaction is finished, performing post-treatment to form the solid thermosetting phenolic resin. The thermoset phenolic resin is granular, is not required to be crushed before use, and is wrapped with the hydrosol for protection, and adhesion can be avoided.

Description

technical field [0001] The invention relates to a phenolic resin, in particular to a solid thermosetting phenolic resin with a core-shell structure and a preparation method thereof. Background technique [0002] Phenol and formaldehyde produce phenolic resin through polycondensation reaction under the action of acidic or basic catalyst. Under the action of an acidic catalyst, a linear thermoplastic resin will be produced when phenol is in excess; under the action of a basic catalyst, a body-shaped thermosetting resin will be produced when formaldehyde is in excess. [0003] Thermosetting phenolic resin is usually liquid, such as CN103965422 provides a kind of preparation method of thermosetting phenolic resin, it will heat and melt phenol in advance, then adds formaldehyde, and drips catalyzer; The product is distilled under reduced pressure until no condensed water flows out; finally, it is cooled to a certain temperature, and then an ethanol solvent is added to obtain a t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28C08G8/10C08J3/12C08L61/14
CPCC08G8/10C08G8/28C08J3/126C08J2361/14
Inventor 王松松苏勋赵昕雅陈利孟付良熊意杨磊叶煜霞
Owner ZHEJIANG HANGMO SYNTHETIC MATERIAL
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