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Thermoplastic phenol formaldehyde resin for ultrathin resin grinding tools and preparation method thereof

A phenolic resin and ultra-thin sheet technology, which is used in the preparation of phenolic resin and the field of thermoplastic phenolic resin for ultra-thin sheet resin abrasive tools, can solve the problem of low molecular weight dispersion coefficient, rapid deterioration of abrasive tool performance, and impact on the quality of resin abrasive tools. and other problems, to achieve the effect of good high temperature fluidity, improved grinding efficiency, and reduced performance attenuation

Active Publication Date: 2014-04-23
ZHUHAI BONDRIGHT SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermoplastic phenolic resin used to prepare resin abrasives has a low molecular weight dispersion coefficient and poor fluidity at high temperatures, which has a great impact on the quality of the prepared resin abrasives, resulting in low grinding efficiency. The performance of the abrasive tool decays quickly, and the service life of the abrasive tool is greatly shortened

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The thermoplastic phenolic resin for ultra-thin resin abrasive tools of the present invention is calculated in parts by mass, and includes the following components: 200 parts of phenol, 35 parts of formaldehyde, 0.1 part of strong acid catalyst, and 0.1 part of weak acid catalyst; In the first stage, 100 parts of phenol, 20 parts of formaldehyde, and 0.1 part of strong acid catalyst were added; in the second stage, 100 parts of phenol, 15 parts of formaldehyde, and 0.1 part of weak acid catalyst were added. The strong acid catalyst is hydrochloric acid, and the weak acid catalyst is oxalic acid.

[0017] Preparation:

[0018] (1) Measure phenol and formaldehyde separately, add them into the reaction kettle with agitator, condenser and temperature measuring device, stir for 20-30 minutes, and slowly add 20%-40% of the strong acid catalyst diluted 1:1 into the reaction kettle During the process, stir and heat up to boiling. Under the condition of maintaining the boiling ...

Embodiment 2

[0023] In the present embodiment, the thermoplastic phenolic resin for ultra-thin sheet resin abrasive tools of the present invention is calculated in parts by mass, and includes the following components: 200 parts of phenol, 50 parts of formaldehyde, 0.5 parts of strong acid catalyst, and 1 part of weak acid catalyst; When adding resin, it is added in two stages. In the first stage, 100 parts of phenol, 25 parts of formaldehyde, and 0.5 parts of strong acid catalyst are added; in the second stage, 100 parts of phenol, 25 parts of formaldehyde, and 1 part of weak acid catalyst are added. The strong acid catalyst is sulfuric acid, and the weak acid catalyst is oxalic acid.

[0024] Preparation method: In this example, the preparation method is the same as that in Example 1.

Embodiment 3

[0026] In the present embodiment, the thermoplastic phenolic resin for the ultra-thin sheet resin abrasive tool of the present invention is calculated in parts by mass, and includes the following components: 200 parts of phenol, 65 parts of formaldehyde, 1 part of strong acid catalyst, and 1.8 parts of weak acid catalyst; When adding resin, it is added in two stages. In the first stage, 100 parts of phenol, 35 parts of formaldehyde, and 1 part of strong acid catalyst are added; in the second stage, 100 parts of phenol, 30 parts of formaldehyde, and 1.8 parts of weak acid catalyst are added. The strong acid catalyst is sulfuric acid, and the weak acid catalyst is oxalic acid.

[0027] Preparation method: In this example, the preparation method is the same as that in Example 1.

[0028] The powder phenolic resin prepared by the present invention can replace the ordinary 2123 phenolic resin, and the ultra-thin sheet resin abrasive tool made without changing the manufacturing proc...

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PUM

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Abstract

The invention provides a thermoplastic phenol formaldehyde resin for ultrathin resin grinding tools with high molecular weight dispersion coefficient and favorable high temperature fluidity and a preparation method thereof. The phenol formaldehyde resin comprises 200 parts of phenol, 35-65 parts of formaldehyde, 0.1-1.0 part of strong acid catalyst and 0.1-1.8 part of weak acid catalyst. The preparation method comprises the following steps: in the first stage, the 100 parts of phenol, 20-35 parts of formaldehyde and 0.1-1.0 part of strong acid catalyst are added; and in the second stage, the 100 parts of phenol, 15-30 parts of formaldehyde and 0.1-1.8 parts of weak acid are added. The thermoplastic phenol formaldehyde resin prepared by sectional polycondensation reaction has higher molecular weight dispersion coefficient and favorable high temperature fluidity; the resin grinding tool manufacturing hardening curve is set more easily; and the grinding wheel prepared from the powder phenol formaldehyde resin has lower property attenuation, and is beneficial to prolonging the service life. The method is applicable to the field of manufacturing of resins.

Description

technical field [0001] The invention relates to a phenolic resin, in particular to a thermoplastic phenolic resin for ultra-thin resin abrasive tools and a preparation method of the phenolic resin. Background technique [0002] Phenolic resins are widely used in various industries. In the field of abrasive tools, the technology of using thermoplastic phenolic resin to make resin abrasive tools has also matured. However, the thermoplastic phenolic resin used to prepare resin abrasives has a low molecular weight dispersion coefficient and poor fluidity at high temperatures, which has a great impact on the quality of the prepared resin abrasives, resulting in low grinding efficiency. The performance of the abrasive tool decays quickly, and the service life of the abrasive tool is greatly shortened. For this reason, need to design a kind of new grinding tool, to overcome above-mentioned defect. Contents of the invention [0003] The technical problem to be solved by the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
Inventor 李凯王扎根李画
Owner ZHUHAI BONDRIGHT SYNTHETIC MATERIAL
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