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Preparation method of high-performance resin adhesive for rock wool sizing

A high-performance, adhesive technology, applied in the direction of adhesives, adhesive types, aldehyde/ketone condensation polymer adhesives, etc., can solve the problems of poor water dilution, high content of free phenol and formaldehyde, short storage period, etc. To achieve the effect of increasing water dilution

Active Publication Date: 2014-02-05
HEBEI SANKAISHENFA SCI & TECH CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-performance resin adhesive suitable for producing rock wool boards and rock wool products and its preparation method to solve the problems of poor water dilution, short storage period, and high content of free phenol and formaldehyde in the prior art. defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 141 grams of phenol in a 1000 milliliter four-neck flask equipped with a stirrer, a thermometer, and a condenser, and heat to melt it. After the phenol was dissolved, 12 g of concentrated sulfuric acid (98%) was added under stirring, and the temperature was raised to 100°C for sulfonation for 1.0 h.

[0025] After the sulfonation reaction is completed, lower the temperature to 55°C, add 10% sodium hydroxide solution (ionic membrane liquid alkali) for neutralization, and control the pH value of the reaction solution at 8-9. At this temperature, 182.4 grams of formaldehyde with a concentration of 37% was added dropwise with a peristaltic pump for 1.0 hours.

[0026] After the dropwise addition of formaldehyde, the temperature was raised to 65°C, and the reaction was kept for 1.5 hours.

[0027] The temperature was raised to 75°C, 7.1 g of carbohydrazide was added, and the reaction was kept for 1.0 h.

[0028] Raise the temperature to 80°C, add 0.9 g of polyvinyl alc...

Embodiment 2

[0031] Add 141 grams of phenol in a 1000 milliliter four-neck flask equipped with a stirrer, a thermometer, and a condenser, and heat to melt it. After the phenol was dissolved, 14.8 g of concentrated sulfuric acid (98%) was added under stirring, and the temperature was raised to 110°C for sulfonation for 1.5 h.

[0032] After the sulfonation reaction is completed, lower the temperature to 65°C, add 10% sodium hydroxide solution (ionic membrane liquid alkali) for neutralization, and control the pH value of the reaction solution at 8-9. At this temperature, 243.2 grams of formaldehyde with a concentration of 37% was added dropwise with a peristaltic pump for 1.5 hours.

[0033] After the dropwise addition of formaldehyde, the temperature was raised to 75°C, and the reaction was kept for 2.0 hours.

[0034] The temperature was raised to 80°C, 11.3 g of carbohydrazide was added, and the reaction was kept for 1.5 hours.

[0035] The temperature was raised to 85°C, 1.7 g of polyv...

Embodiment 3

[0038] Add 141 grams of phenol in a 1000 milliliter four-necked flask equipped with a stirrer, a thermometer, and a condenser, and heat to melt it. After the phenol was dissolved, 13.4 g of concentrated sulfuric acid (98%) was added under stirring, and the temperature was raised to 105°C for sulfonation for 1.5 h.

[0039] After the sulfonation reaction is completed, lower the temperature to 60°C, add 10% sodium hydroxide solution (ionic membrane liquid alkali) for neutralization, and control the pH value of the reaction solution at 8-9. At this temperature, 212.8 grams of formaldehyde with a concentration of 37% was dripped with a peristaltic pump for 1.5 hours.

[0040] After the dropwise addition of formaldehyde, the temperature was raised to 70°C, and the reaction was kept for 2.0 hours.

[0041]The temperature was raised to 80°C, 9.2 g of carbohydrazide was added, and the reaction was kept for 1.5 h.

[0042] The temperature was raised to 85°C, 1.3 g of polyvinyl alcoho...

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PUM

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Abstract

The invention provides a preparation method of a high-performance resin adhesive for rock wool sizing, and relates to the field of resins. The high-performance resin adhesive is prepared from the following raw materials: phenol, concentrated sulfuric acid, formaldehyde, carbohydrazide, polyvinyl alcohol, liquid alkali and the like. The synthesis process of the high-performance resin adhesive comprises the following four reaction phases: in the first reaction phase, performing a sulfonation reaction on partial phenol and concentrated sulfuric acid at 100 DEG C to 110 DEG C so as to generate p-hydroxybenzenesulfonic acid; in the second reaction phase, condensing the majority of phenol remaining in the first reaction phase and p-hydroxybenzenesulfonic acid generated by the first reaction phase with formaldehyde under an alkali condition so as to generate a phenol formaldehyde resin adhesive; in the third reaction phase, adding carbohydrazide to be condensed with incompletely-reacted phenol, intermediates and formaldehyde so as to generate a phenol-carbohydrazide-formaldehyde resin adhesive; in the last reaction phase, adding polyvinyl alcohol to react with residual formaldehyde so as to generate a polyvinyl formal adhesive. The high-performance resin adhesive is long in storage life, high in water dilutability and low in free phenol and formaldehyde content, thereby being suitable for the fields of rock wool sizing and the like.

Description

technical field [0001] The invention relates to the technical field of resins, in particular to a method for preparing a high-performance adhesive for rock wool sizing. Background technique [0002] In recent years, my country's construction industry has developed rapidly, and rock wool boards and rock wool products have been rapidly popularized and applied as Class A non-combustible fireproof insulation materials. Rock wool board is made of basalt, gabbro, dolomite and other natural rocks that are melted at high temperature in a cupola, and the molten fluid enters a four-roller centrifuge and is thrown into rock wool fiber filaments to form fiber filaments that are sprayed with adhesives, dustproof agents, Admixtures such as water-repellent agent are laminated to a certain thickness, and then pressed into a curing furnace for solidification, cooling, and cutting. [0003] In the process of preparing rock wool boards and rock wool products, in order to bond the rock wool fi...

Claims

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Application Information

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IPC IPC(8): C09J161/00C09J129/14C08G16/02C08F16/06C08F8/28
Inventor 马国栋靳通收谢红王文彬骆志超李雪玲陈占虎
Owner HEBEI SANKAISHENFA SCI & TECH CORP LTD
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