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Method for manufacturing glass fiber net cover by using environment-friendly phenolic resin

A technology of glass fiber mesh and phenolic resin is applied in the field of making glass fiber mesh cover with environmentally friendly phenolic resin, which can solve the problems of employee health injury, high safety risk, and environmental pollution.

Pending Publication Date: 2020-09-01
绵阳中研磨具有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above description, the main disadvantages of using alcohol-soluble phenolic resin for the production of net covers are: ① Higher safety risks, ② High energy consumption, ③ Large environmental pollution, ④ High cost, ⑤ Some damage to the health of employees

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of environment-friendly type phenolic resin, comprises the steps:

[0035] (1) Mix 38% phenol and 57% formaldehyde aqueous solution by mass percentage, and stir at 20-40° C. for 5-20 minutes;

[0036] (2) Adding mass percentage is 3% water, 2% sodium hydroxide, is heated up to 70-90 ℃ and reacts for 60-140 minutes;

[0037](3) Keep the reaction temperature at 70-90°C and adjust the viscosity to 70cp.s, then cool and discharge to obtain an environment-friendly phenolic resin.

[0038] The prepared environment-friendly phenolic resin has a solid content of 54% and a water solubility ratio (25° C.) of 2.2 times.

[0039] The mass concentration of the selected raw materials: the mass concentration of the formaldehyde aqueous solution is 37%; the mass concentration of the phenol is 98%; the mass concentration of the sodium hydroxide is 98%.

Embodiment 2

[0041] A kind of preparation method of environment-friendly type phenolic resin, comprises the steps:

[0042] (1) Mix 48% phenol and 43% formaldehyde aqueous solution by mass percentage, and stir at 20-40° C. for 5-20 minutes;

[0043] (2) Adding 4% water and 5% sodium hydroxide by mass percentage, raising the temperature to 70-90° C. and reacting for 60-140 minutes;

[0044] (3) Keep the reaction temperature at 70-90°C and adjust the viscosity to 120cp.s, then cool and discharge to obtain an environment-friendly phenolic resin.

[0045] The prepared environment-friendly phenolic resin has a solid content of 60% and a water solubility ratio (25° C.) of 2.7 times.

[0046] The mass concentration of the selected raw materials: the mass concentration of the formaldehyde aqueous solution is 37%; the mass concentration of the phenol is 98%; the mass concentration of the sodium hydroxide is 98%.

Embodiment 3

[0048] A kind of preparation method of environment-friendly type phenolic resin, comprises the steps:

[0049] (1) Mix 39% phenol and 44% formaldehyde aqueous solution by mass percentage, and stir at 20-40° C. for 5-20 minutes;

[0050] (2) Adding 10% water, 2% sodium hydroxide and 5% potassium hydroxide by mass percentage, raising the temperature to 70-90° C. for 60-140 minutes;

[0051] (3) Keep the reaction temperature at 70-90°C and adjust the viscosity to 60cp.s, then cool and discharge to obtain an environment-friendly phenolic resin.

[0052] The solid content of the produced environment-friendly phenolic resin is 53%, and the water solubility ratio (25° C.) is 3.2 times.

[0053] The mass concentration of selected raw materials: the mass concentration of the formaldehyde aqueous solution is 44%; the mass concentration of the phenol is 98%; the mass concentration of the sodium hydroxide is 98%; the mass concentration of potassium hydroxide is 95%.

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Abstract

The invention provides a manufacturing method for manufacturing a glass fiber net cover by using environment-friendly phenolic resin. The environment-friendly phenolic resin is prepared from the following raw materials in percentage by mass: 38-48% of phenol; 43-57% of a formaldehyde aqueous solution; 1-10% of water; and 1-7% of a basic catalyst. The preparation method comprises the following steps of: mixing the phenol and formaldehyde aqueous solution in the corresponding percentages by mass, and stirring an obtained mixture for 5-20 minutes at 20-40 DEG C; adding the water and the basic catalyst in the corresponding percentages by mass, heating an obtained mixture to 70-90 DEG C to react for 60-140 minutes; and keeping temperature at 70-90 DEG C, adjusting viscosity to be 60-140 cp.s, performing cooling and discharging so as to obtain the environment-friendly phenolic resin. The environment-friendly phenolic resin is compounded into dipping glue for manufacturing the net cover. Thepreparation method of the environment-friendly phenolic resin is mild in condition and free of pollution. The environment-friendly phenolic resin can be used for producing the net cover without beingdiluted, curing temperature and time are reduced, the volatilization of organic matters is reduced, and production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of glass fiber mesh covers, in particular to a method for making glass fiber mesh covers with environment-friendly phenolic resin. Background technique [0002] At present, the synthetic resin used in the glass fiber mesh cover is basically alcohol-soluble (thermoplastic) phenolic resin. Amine, paraformaldehyde, etc., the current commonly used curing agent is hexamethylenetetramine. The impregnation glue used to prepare the glass fiber mesh cover is mainly composed of solid phenolic resin, liquid phenolic resin, alcohol solvent, hexamethylenetetramine, pigment, etc. The curing amount of the impregnation solution is 59±8%, of which the alcohol solvent The function is to dissolve the solid phenolic resin, adjust the viscosity of the impregnation solution, and increase the permeability of the impregnation solution and the glass fiber cloth. The resin used in the production of glass fiber mesh cover is thermop...

Claims

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Application Information

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IPC IPC(8): C08G8/10C08L61/10C08K7/00C08K7/14B29C70/46
CPCC08G8/10C08K7/00C08K7/14B29C70/46C08L61/06
Inventor 谢果刘琪叶应松
Owner 绵阳中研磨具有限责任公司
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