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Liquid phenolic resin with high solid content and special for resin grinding tool and preparation method thereof

A technology of liquid phenolic resin and high solid content, which is applied in the new formulation of thermosetting liquid phenolic resin and its preparation field, which can solve the problems of low solid content of phenolic resin, easy deformation of resin abrasives, poor stability, etc. Effect of mixing, stable product quality and good particle shape

Inactive Publication Date: 2018-04-24
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 particularity of its application in the manufacture of resin abrasive tools and the lack of production technology, some phenolic resins on the market still have some defects, such as low solid content of phenolic resin and poor stability. Easy deformation, high scrap rate, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The special liquid phenolic resin for high solid content resin abrasive tools is calculated in parts by weight, and it includes the following components: 100 parts of phenol; 94 parts of formaldehyde; 5 parts of composite alkali metal oxide; 2 parts of formaldehyde scavenger; 1.5 parts of basic catalyst 0.3 part of lactic acid; the concentration of the formaldehyde is 37%; the molar ratio of the phenol and formaldehyde is 1:1.1~2.0; the composite alkali metal oxide is divalent magnesium zinc salt. The basic catalyst is selected from one of divalent barium salt, carbonate, calcium hydroxide or sodium hydroxide.

[0027] Weigh each raw material according to the above-mentioned ratio of parts by mass, and prepare according to the following steps:

[0028] (1) Weigh phenol and formaldehyde in proportion and add them to the reaction kettle;

[0029] (2) Add a basic catalyst to the reactor;

[0030] (3) Heating, so that the material in the reactor is heated slowly at a unif...

Embodiment 2

[0037] The difference between this embodiment and the embodiment is that the composition ratio of the special liquid phenolic resin for high solid content resin abrasive tools is different, specifically as follows: calculated in parts by weight, it includes the following components: 100 parts of phenol; 120 parts of formaldehyde 10 parts of composite alkali metal oxides; 5 parts of formaldehyde scavenger; 2.0 parts of basic catalyst; 1.0 part of lactic acid; the concentration of said formaldehyde is 37%; The composite alkali metal oxide is divalent magnesium zinc salt. The basic catalyst is selected from one of divalent barium salt, carbonate, calcium hydroxide or sodium hydroxide.

[0038] Various raw materials were weighed according to the above weight ratio, and the liquid phenolic resin was prepared with the process steps described in Example 1.

Embodiment 3

[0040] The difference between this embodiment and the above two embodiments is that: the composition ratio of the special liquid phenolic resin for high solid content resin abrasive tools is different, as follows: calculated by weight, it includes the following components: 100 parts of phenol; 165 parts of formaldehyde; 15 parts of composite alkali metal oxides; 8 parts of formaldehyde scavenger; 2.8 parts of basic catalyst; 1.8 parts of lactic acid; the concentration of said formaldehyde is 37%; 2.0; the composite alkali metal oxide is divalent magnesium zinc salt. The basic catalyst is selected from one of divalent barium salt, carbonate, calcium hydroxide or sodium hydroxide.

[0041] Various raw materials were weighed according to the above-mentioned proportions in parts by weight, and prepared with the same process steps as described in Example 1.

[0042] The liquid phenolic resin prepared by the inventive method has the following characteristics:

[0043] 1. With high...

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PUM

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Abstract

The invention aims at providing liquid phenolic resin with a high solid content and special for resin grinding tools and a preparation method thereof. The liquid phenolic resin is appropriate in molarratio, high in solid content and stable in technical index, and the resin grinding tools made of the liquid phenolic resin have excellent performance. The phenolic resin is prepared from, by mass, 100 parts of phenol, 94-170 parts of formaldehyde, 5-15 parts of composite alkali metal oxides, 1-10 parts of formaldehyde catching agent, 1.2-3.0 parts of basic catalysts and 0.1-2 parts of lactic acid, wherein the concentration of formaldehyde is 37%. The preparation method of the phenolic resin includes the following steps of adding phenol and formaldehyde; adding the basic catalysts; conductingheating by three steps, and then conducting vacuum dewatering; introducing icy water for fast cooling, adding composite alkali metal oxides, and then conducting depressurization and dewatering; addinga formaldehyde catching agent and lactic acid, and conducting stirring; detecting corresponding technical indexes, and if the indexes reach standards, obtaining a product. The liquid phenolic resin with the high solid content and special for the resin grinding tools and the preparation method thereof are applied to the field of phenolic resin.

Description

technical field [0001] The invention relates to a new formula of thermosetting liquid phenolic resin and its preparation process, in particular to a water-soluble liquid phenolic resin synthesized twice at low temperature and rapidly lowered in temperature and a preparation method of the phenolic resin. Background technique [0002] Phenolic resins are widely used in the manufacture of resin abrasive tools, especially resin chip / grinding wheels. However, due to the particularity of its application in the manufacture of resin abrasive tools and the lack of production technology, some phenolic resins on the market still have some defects, such as low solid content of phenolic resin and poor stability. Easy deformation, high scrap rate and other issues. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a special liquid phenolic resin with high solid content resin abrasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
CPCC08G8/10
Inventor 李凯王扎根林文业李保乡李画魏朝
Owner ZHUHAI BONDRIGHT SYNTHETIC MATERIAL
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