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Melamine modified resin and preparation method and application thereof

A technology of melamine and modified resin, which is applied in the direction of textiles and papermaking, paper, non-fiber pulp addition, etc. It can solve the problems of poor fluidity, poor stain resistance and scratch resistance, and poor high temperature resistance of melamine-formaldehyde resin, etc. problems, to achieve smooth and dense curing, good scratch resistance, and good fluidity

Inactive Publication Date: 2017-09-19
东莞市贝辉装饰材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, ordinary melamine-formaldehyde resin has poor high-temperature resistance, and the melamine-impregnated paper produced after impregnation and drying has poor fluidity and cannot form a smooth and dense cured layer when pressed and pasted at a higher temperature. Pinholes are easy to appear on the surface of the board, and the resistance to stains and scratches is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of melamine modified resin, its preparation method comprises the steps:

[0022] Add 10 parts by weight of formaldehyde solution to the reaction kettle, adjust the pH to 8.1 with 26 wt% NaOH solution, add 0.05 parts by weight of BH-333, then add 9 parts by weight of melamine, heat up to 87.5 °C, and keep warm until the water solubility ratio is 3.0 , turn on the cooling water, cool down to 45°C and release the glue to get the melamine modified resin;

[0023] Among them, the above-mentioned formaldehyde solution is 37% industrial formaldehyde, and BH-333 is purchased from Dongguan Youke Decoration Materials Co., Ltd., which is synthesized from small molecular substances such as organic silicon, organic fluorine, polyurethanes, and alcohols.

Embodiment 2

[0025] A kind of melamine modified resin, its preparation method comprises the steps:

[0026] Add 10 parts by weight of formaldehyde solution to the reaction kettle, adjust the pH to 8..2 with 27wt% NaOH solution, add 0.06 parts by weight of BH-333, then add 10 parts by weight of melamine, heat up to 90°C, and keep warm until the water dissolves When the multiple is 3.0, turn on the cooling water, cool down to 45°C and release the glue to obtain the melamine modified resin;

[0027] Among them, the above-mentioned formaldehyde solution is 37% industrial formaldehyde, and BH-333 is purchased from Dongguan Youke Decoration Materials Co., Ltd., which is synthesized from small molecular substances such as organic silicon, organic fluorine, polyurethanes, and alcohols.

Embodiment 3

[0029] A kind of melamine modified resin, its preparation method comprises the steps:

[0030] Add 10 parts by weight of formaldehyde solution to the reaction kettle, adjust the pH to 8.4 with 29 wt% NaOH solution, add 0.07 parts by weight of modifier, and then add 10 parts by weight of melamine, heat up to 91 ° C, and keep warm until the water solubility ratio is 3.0 , turn on the cooling water, cool down to 45°C and release the glue to obtain the melamine modified resin.

[0031] Among them, the above-mentioned formaldehyde solution is 37% industrial formaldehyde, and BH-333 is purchased from Dongguan Youke Decoration Materials Co., Ltd., which is synthesized from small molecular substances such as organic silicon, organic fluorine, polyurethanes, and alcohols.

[0032] The melamine-modified resins prepared in the above examples 1-3 are all applied to the preparation of impregnated paper by the second impregnation method, that is, after the first impregnation, the first dryi...

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PUM

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Abstract

The invention discloses melamine modified resin and a preparation method and application thereof. The preparation method includes: adding, by weight, 10 parts of formaldehyde solution, using 25-33wt% NaOH solution to adjust pH to 8.0-8.5, adding, by weight, 0.045-0.08 parts of modifying agent and then 8.5-11 parts of melamine, increasing temperature to 87-93 DEG C, holding the temperature for reaction until water soluble multiple is 3.0, using cooling water to cool to 45 DEG C, and discharging glue. The modifying agent is utilized to modify melamine resin and reacts with amino and hydroxyl in the melamine resin at high temperature, so that high-temperature-resistant silicon-fluorine bonds are contained on a main chain of the modified resin; more branched chains with chemical groups capable of being in reaction at 120-130 DEG C are connected on the main chain of the melamine modified resin, melamine impregnated paper has good flowing performance when being pressed for use at high temperature, a smooth and compact cured layer can be formed after curing, and curing degree is high.

Description

technical field [0001] The invention relates to a melamine resin, in particular to a melamine modified resin and its preparation method and application. Background technique [0002] At present, wood impregnation resins at home and abroad are mainly urea-formaldehyde resins, followed by phenolic resins and melamine-formaldehyde resins. [0003] Urea-formaldehyde resin has the advantages of abundant raw materials, simple production, convenient use, low cost and high adhesive strength, and is widely used, but it has disadvantages such as poor water resistance, poor stability, poor durability, and unfavorable storage and transportation. [0004] Phenolic resin is composed of a large number of benzene rings, which can be cross-linked into a bulk structure, has greater rigidity and excellent heat resistance, but has defects such as high cost, dark adhesive layer, high curing temperature and long curing time. [0005] The heat resistance, water resistance, abrasion resistance, ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/40C08G12/32D21H17/51D21H21/14
CPCC08G12/40C08G12/32D21H17/51D21H21/14
Inventor 彭峻胡锡咏朱亚香
Owner 东莞市贝辉装饰材料有限公司