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Powdery phenolic resin for diamond grinding block and preparation method thereof

A phenolic resin and diamond technology, applied in the field of phenolic resin, can solve the problems of poor water resistance and low grinding efficiency, and achieve the effects of improved water resistance, high grinding efficiency and excellent grinding performance

Inactive Publication Date: 2017-05-17
ZHUHAI BONDRIGHT SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor water resistance and low grinding efficiency of the powder thermoplastic phenolic resin used to prepare diamond grinding blocks, most manufacturers of diamond grinding blocks use imported modified powder phenolic resins, which urgently need to meet the technical requirements of high-performance diamond grinding blocks. modified phenolic resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Follow the steps below to prepare powdered phenolic resin:

[0025] 1. Add 200 parts of phenol and 58 parts of formaldehyde into the reaction kettle with agitator, condenser and temperature measuring device, stir for 26 minutes, add 0.4 parts of hydrochloric acid into the reaction kettle, stir, heat up to boiling, and keep the boiling temperature Under reaction 24min;

[0026] 2. Add 0.8 parts of oxalic acid and react for 90 minutes while maintaining boiling temperature;

[0027] 3. Dehydration under reduced pressure until the vacuum degree is 0.08MPa. When the temperature of the dehydrated material reaches 170°C, stop dehydration, lower the temperature to 140°C, add 10 parts of ethylene bisstearamide, stir for 15 minutes, and then add 0.3 parts of silane coupling Agent A-187, after 40 minutes, open the bottom valve, discharge, and cool;

[0028] 4. Crush the phenolic resin cooled to room temperature into blocks with a diameter of 10-20mm, then add urotropine accordin...

Embodiment 2

[0030] Follow the steps below to prepare powdered phenolic resin:

[0031] 1. Add 200 parts of phenol and 47 parts of formaldehyde into the reaction kettle with agitator, condenser and temperature measuring device, stir for 20 minutes, add 0.2 parts of hydrochloric acid into the reaction kettle, stir, heat up to boiling, and keep the boiling temperature Under reaction 17min;

[0032] 2. Add 0.3 parts of oxalic acid and react for 60 minutes at boiling temperature;

[0033] 3. Dehydration under reduced pressure until the vacuum degree is 0.09MPa. When the temperature of the dehydrated material reaches 160°C, stop dehydration, lower the temperature to 120°C, add 8 parts of ethylene bisstearamide, stir for 20 minutes, and then add 0.1 part of silane coupling Agent A-187, after 50 minutes, open the bottom valve, discharge, and cool;

[0034] 4. Crush the phenolic resin cooled to room temperature into blocks with a diameter of 10-20 mm, then add urotropine according to 8% of the m...

Embodiment 3

[0036] Follow the steps below to prepare powdered phenolic resin:

[0037] 1. Add 200 parts of phenol and 68 parts of formaldehyde into the reaction kettle with agitator, condenser and temperature measuring device, stir for 28 minutes, add 0.6 parts of hydrochloric acid into the reaction kettle, stir, heat up to boiling, and keep the boiling temperature Reaction for 30min;

[0038] 2. Add 1.1 parts of silicic acid and react for 120 minutes while maintaining the boiling temperature;

[0039] 3. Dehydration under reduced pressure until the vacuum degree is 0.07MPa. When the temperature of the dehydrated material reaches 180°C, stop dehydration, lower the temperature to 150°C, add 12 parts of ethylene bisstearamide, stir for 10 minutes, and then add 0.5 part of silane coupling Agent A-187, after 30 minutes, open the bottom valve, discharge, and cool;

[0040] 4. Crush the phenolic resin cooled to room temperature into blocks with a diameter of 10-20mm, then add urotropine accor...

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PUM

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Abstract

The invention belongs to the field of phenolic resins, and discloses a powdery phenolic resin for a diamond grinding block. The powdery phenolic resin comprises the following components in parts by weight: 200 parts of phenol, 45-70 parts of formaldehyde, 0.3-1.8 parts of acid catalyst, 8-12 parts of internal lubricant and 0.1-0.5 part of silane coupling agent, wherein the acid catalyst comprises 0.1-0.6 part of strong acid catalyst and 0.2-1.2 parts of weak acid catalyst. The invention also discloses a preparation method of the powdery phenolic resin. The durability of a diamond grinding block prepared from the modified powdery phenolic resin is increased by 15-25%, the grinding efficiency is enhanced by 10-20%, the service life is prolonged, the grindability is excellent, and the water resistance is greatly improved; and the surface roughness value of a workpiece ground by the diamond grinding block is lower.

Description

technical field [0001] The invention belongs to the field of phenolic resins, in particular to a powdered phenolic resin for diamond grinding blocks and a preparation method thereof. Background technique [0002] Phenolic resins are widely used in superabrasives. Grinding blocks made of diamond abrasives have excellent grinding performance, and have been widely used in various aspects of grinding technology, and have become ultra-precision grinding, high-efficiency grinding, grinding of difficult-to-machine materials, high-precision forming grinding automation and other technical basis. [0003] At present, it is common for domestic grinding blocks to fall off quickly, the abrasive itself is consumed quickly, and slipping occurs during grinding, making it difficult to meet the surface roughness requirements. [0004] The technology of using powdered thermoplastic phenolic resin to make diamond grinding blocks has also matured. However, due to the poor water resistance and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10C08L61/10C08K5/20C08K5/5435C08J3/12
CPCC08G8/10C08J3/12C08J2361/06C08K5/20C08K5/5435C08L61/06
Inventor 李凯王扎根李画
Owner ZHUHAI BONDRIGHT SYNTHETIC MATERIAL
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