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Phenolic resin for abrasive paper, preparation method of phenolic resin and compound gluefor abrasive paper

A technology of phenolic resin and sandpaper, which is used in manufacturing tools, metal processing equipment, abrasives, etc., can solve the problems of high cost, increased cost, poor sandpaper performance, etc., and achieves moderate adhesive viscosity, grinding performance and high tensile strength. , the effect of light discoloration

Pending Publication Date: 2020-06-05
浙江自立高分子化工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two commonly used improvement methods for light-colored sandpaper. One is to increase the specific gravity of the pigment or add a brightener, but this method will increase the cost; the other is to reduce the curing temperature, but this method will result in long process time and high cost. The degree is low, the performance of the obtained sandpaper is poor

Method used

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  • Phenolic resin for abrasive paper, preparation method of phenolic resin and compound gluefor abrasive paper
  • Phenolic resin for abrasive paper, preparation method of phenolic resin and compound gluefor abrasive paper
  • Phenolic resin for abrasive paper, preparation method of phenolic resin and compound gluefor abrasive paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the reactor (for example equipped with stirrer, thermometer, vacuum gauge and heating and cooling device), add 600g phenol, 920g concentration is 37% formalin aqueous solution, after starting to stir, add 9g sodium carbonate, be warming up to 90 ℃, After constant temperature reaction for 2 hours, system A was obtained;

[0038] In system A, add 100g of m-cresol and keep it warm at 95°C for 2 hours to obtain system B;

[0039] The temperature of system B was lowered to 65° C., 60 g of urea was added, and vacuum distillation and dehydration was carried out to the preset viscosity (1400 mPa·s) to obtain the first component.

[0040] Add 100g of p-toluenesulfonic acid into the reaction kettle, add 40g of water and stir to dissolve, then add 110g of ethanol and stir evenly to obtain the second component.

[0041] Get 6g of the second component and add 100g of the first component, stir and mix to obtain the phenolic resin for sandpaper of this example.

[0042] During th...

Embodiment 2

[0045] In a reaction kettle (such as equipped with a stirrer, a thermometer, a vacuum gauge and a heating and cooling device), add 600g of phenol, 950g of a 37% formaldehyde solution, start stirring, add 9g of sodium hydroxide, and heat up to 90°C , after constant temperature reaction for 2 hours, system A was obtained;

[0046] In system A, add 100g of p-cresol and keep it warm at 95°C for 2 hours to obtain system B;

[0047] Cool the system B to 65°C, add 60g of melamine, carry out vacuum distillation and dehydration to the preset viscosity (1400Pa·s), and obtain the first component.

[0048] Add 100g of phenolsulfonic acid into the reaction kettle, add 40g of water and stir to dissolve, then add 110g of ethanol and stir evenly to obtain the second component.

[0049] Get 8g of the second component and add 100g of the first component, stir and mix to obtain the phenolic resin for sandpaper of this example.

[0050] The viscosity of the first component product obtained in t...

Embodiment 3

[0052] In the reactor (for example equipped with stirrer, thermometer, vacuum gauge and heating, cooling device), add 600g phenol, 800g concentration is the paraformaldehyde aqueous solution of 95%, after starting to stir, add 9g potassium hydroxide, be heated up to After 2 hours of constant temperature reaction at 90°C, system A was obtained;

[0053] In system A, add 100g of xylenol and keep it warm at 95°C for 2 hours to obtain system B;

[0054] Cool the system B to 65°C, add 60g of benzomelamine, carry out vacuum distillation and dehydration to the preset viscosity (1400mPa·s), and obtain the first component.

[0055] Add 100g of methanesulfonic acid into the reaction kettle, add 40g of water and stir to dissolve, then add 110g of ethanol and stir evenly to obtain the second component.

[0056] Get 6g of the second component and add 100g of the first component, stir and mix to obtain the phenolic resin for sandpaper of this example.

[0057] The viscosity of the first c...

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Abstract

The invention provides a phenolic resin for abrasive paper, a preparation method of the phenolic resin and a compound glue for the abrasive paper. The phenolic resin comprises a first component and asecond component, the preparation method of the first component comprises the following steps: reacting phenol with an aldehyde in a nitrogen atmosphere at 80-90 DEG C for 1-3 hours under the action of an inorganic base catalyst to obtain a system A; adding a phenol into the system A, and reacting at 80-100 DEG C for 1-2 hours to obtain a system B; adjusting the temperature of the system B to 60-70 DEG C, adding an amino compound, and dehydrating to a preset viscosity to obtain the first component; the preparation method of the second component comprises the following steps: dissolving an organic acid in water and ethanol to obtain the second component; wherein the mass ratio of the first component to the second component is 1: (0.01-0.1). The phenolic resin is light in discoloration in the storage process, and the obtained abrasive paper is higher in abrasive resistance.

Description

technical field [0001] The present application relates to the field of resin adhesives, in particular to a phenolic resin for sandpaper, a preparation method thereof, and a compound glue for sandpaper. Background technique [0002] The application of phenolic resin is very extensive. It is used as a binder in the coated abrasive industry and can be used in various abrasive cloths, sandpaper, and abrasive belts. Because the color of phenolic resin will become darker after curing, the application of phenolic resin is limited. When making light-colored and bright-colored coated products, conventional phenolic resin cannot meet the requirements, which requires research on the modification of phenolic resin. Make it lighter in color after curing. [0003] Ordinary resin will turn yellow to brown when exposed to ultraviolet light; blue pigment is added to ordinary resin, and it will turn green to black when exposed to ultraviolet light. There are two commonly used improvement me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G14/08C08G14/10C08G14/09B24D3/28B24D3/34
CPCC08G14/08C08G14/10C08G14/06B24D3/285B24D3/344B24D3/346
Inventor 王继满李波王富成樊华锋
Owner 浙江自立高分子化工材料有限公司
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