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Phenolic resin compound for wet-curtain paper, preparation method of phenolic resin compound and preparation method of wet-curtain paper

A technology of phenolic resin and composition, which is applied in the direction of inorganic compound addition, papermaking, paper, etc., can solve the problems of wet curtain paper, such as large influence on water absorption and water retention performance of base paper, poor water absorption and water retention performance, and slow water absorption speed, etc. Achieve good water solubility, enhance water absorption and water retention, and reduce impact

Active Publication Date: 2014-01-15
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used thermosetting phenolic resins are generally obtained from phenol and formaldehyde as raw materials, reacted under basic catalysts, pH values ​​of 8 to 10, and constant temperature conditions of 70°C to 90°C. Although they have good stiffness and water resistance, they are Its water absorption performance and water retention performance are relatively poor, so that the water absorption performance and water retention performance of the obtained wet curtain paper are greatly affected by the base paper, not only the water absorption speed is slow, the water absorption is small, and the water retention performance is poor

Method used

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  • Phenolic resin compound for wet-curtain paper, preparation method of phenolic resin compound and preparation method of wet-curtain paper
  • Phenolic resin compound for wet-curtain paper, preparation method of phenolic resin compound and preparation method of wet-curtain paper
  • Phenolic resin compound for wet-curtain paper, preparation method of phenolic resin compound and preparation method of wet-curtain paper

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preparation example Construction

[0031] The present invention also provides a preparation method of the phenolic resin composition for wet curtain paper, comprising:

[0032] Phenol and formaldehyde undergo polycondensation reaction under the action of a basic catalyst to obtain an intermediate product;

[0033] Adding a hydroxyl-containing water-soluble compound and / or a desiccant to the intermediate product, and continuing the reaction to obtain a phenolic resin composition.

[0034] In the invention, phenol and formaldehyde are firstly added with a basic catalyst to carry out polycondensation reaction, and then a water-soluble compound containing a hydroxyl group and / or a desiccant are added to continue the reaction to obtain a phenolic resin composition.

[0035] In the present invention, firstly, phenol and formaldehyde are mixed, and then a basic catalyst is added to carry out polycondensation reaction. In the present invention, the formaldehyde is preferably an aqueous formaldehyde solution, and the m...

Embodiment 1

[0068] Add 940g of phenol (10mol) and 2432g of formaldehyde solution with a mass concentration of 37% into the reactor for mixing, add 37.6g of a mass concentration of 96% sodium hydroxide solution, heat up to 80°C at a constant temperature, and continue to add 282g of glycerol for constant temperature reaction When the viscosity is 60-70cp / 25°C, quickly cool down to below 40°C to obtain a phenolic resin liquid;

[0069] Mix the phenolic resin solution and water evenly at a mass ratio of 1:3 to obtain a resin solution; immerse the base paper in the resin solution, dry the resin-impregnated paper at 60°C for 10 minutes, and continue drying at 130°C Drying at low temperature for 20 minutes, and then constant temperature and humidity for 3 hours at 25°C and 50% humidity to obtain wet curtain paper;

[0070] Measure the water absorption of the wet curtain paper according to the method described above, the results are shown in Table 1, and Table 1 is the water absorption test resul...

Embodiment 2

[0074] Add 940g of phenol (10mol) and 2432g of formaldehyde solution with a mass concentration of 37% into the reactor for mixing, add 37.6g of a mass concentration of 96% sodium hydroxide solution, heat up to a constant temperature of 80°C, and continue to add 141g of anhydrous calcium chloride React at a constant temperature until the viscosity is 60-70cp / 25°C, and quickly cool down to below 40°C to obtain a phenolic resin solution;

[0075] Mix the phenolic resin solution and water evenly at a mass ratio of 1:3 to obtain a resin solution; immerse the base paper in the resin solution, dry the resin-impregnated paper at 60°C for 10 minutes, and continue drying at 130°C Drying at low temperature for 20 minutes, and then constant temperature and humidity for 3 hours at 25°C and 50% humidity to obtain wet curtain paper;

[0076] Measure the water absorption of the wet curtain paper according to the method described above, the results are shown in Table 1, and Table 1 is the wate...

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Abstract

The invention provides a phenolic resin compound for wet-curtain paper. The phenolic resin compound comprises thermosetting phenolic resin, a water-soluble compound containing hydroxyl and / or a drying agent. The invention also provides a preparation method of the phenolic resin compound for the wet-curtain paper, comprising the steps that phenol and formaldehyde are subjected to condensation polymerization due to the action of basic catalysts, so that an intermediate product is obtained; and the water-soluble compound containing hydroxyl and / or the drying agent are / is added in the intermediate product, and the reaction is conducted continuously, so that the phenolic resin compound is obtained. The invention also provides a preparation method of the wet-curtain paper. After being proved by an experiment, compared with the existing conventional thermosetting phenolic resin, the wet-curtain paper prepared by the phenolic resin compound provided by the invention has the advantages that the water absorbing capacity is increased to more than 300% from more than 200%, the water absorbing speed is reduced to be less than 15s from more than 20s, and the water loss is reduced to be less than 180g from more than 250g.

Description

technical field [0001] The invention belongs to the technical field of phenolic resins, and in particular relates to a phenolic resin composition for wet curtain paper, a preparation method thereof and a preparation method of wet curtain paper. Background technique [0002] Wet curtain paper, also known as water curtain paper, is a product made of base paper dipped in glue and formed into a honeycomb structure. Wet curtain paper has the characteristics of water absorption, water resistance, fast diffusion speed, long-lasting performance, ventilation and breathability, and corrosion resistance. It is widely used in cooling systems, humidification systems, and filtration systems. [0003] In the process of processing base paper into wet curtain paper, the base paper needs to be impregnated in phenolic resin solution and then cured at high temperature. Using the characteristics of high stiffness and strong water resistance after curing of phenolic resin, the performance of wet ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/10C08L71/08C08L29/04C08K5/053C08K3/16C08K3/30C08G8/10D21H17/66D21H17/48
Inventor 张宝印隗骁健李枝芳
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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