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Preparation method of modified phenolic resin adhesive and product of modified phenolic resin adhesive

A phenolic resin glue and modification technology, which is applied in the preparation of modified phenolic resin adhesives and the field of modified phenolic resin adhesives, can solve the problems of high-value utilization of papermaking waste and low utilization rate, and achieve biomass resources Efficient utilization, conducive to large-scale industrial production, and the effect of improving reaction efficiency

Inactive Publication Date: 2019-04-26
SHANGHAI CHANGFA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vast majority of papermaking waste is burned as fuel, and only 1% to 2% of papermaking waste is separated to produce high value-added products. It can be seen that in actual production, the high value utilization rate of papermaking waste is low

Method used

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  • Preparation method of modified phenolic resin adhesive and product of modified phenolic resin adhesive
  • Preparation method of modified phenolic resin adhesive and product of modified phenolic resin adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare the modified phenolic resin adhesive according to the following steps:

[0026] S1: Add 100g of phenol and 30g of sodium hydroxide into the reaction kettle, start stirring to mix the reactants at the bottom of the kettle evenly, raise the temperature of the reaction system to 50°C within 30 minutes, and keep stirring for 30 minutes;

[0027] S2: Drop the first part of formaldehyde 180g into the reaction kettle at an appropriate dropping rate by using a dropping pump, and keep stirring for 30 minutes;

[0028] S3: The temperature of the reaction system is raised to 80°C within 40 minutes, and then the second part of formaldehyde 60g is dropped into the reactor at an appropriate drop rate using a drop pump, and kept stirring for 50 minutes;

[0029] S4: Add 10g of papermaking waste and 50g of deionized water, keep stirring for 90min;

[0030] S5: Use a dripping pump to drop 10 g of the third part of formaldehyde into the reactor at an appropriate dropping rate, a...

Embodiment 2

[0033] Prepare the modified phenolic resin adhesive according to the following steps:

[0034] S1: Add 50g of phenol and 15g of sodium hydroxide into the reaction kettle, start stirring to mix the reactants at the bottom of the kettle evenly, raise the temperature of the reaction system to 50°C within 30 minutes, and keep stirring for 30 minutes;

[0035] S2: Drop the first part of formaldehyde 140g into the reaction kettle at an appropriate dropping rate by using a dropping pump, and keep stirring for 30 minutes;

[0036] S3: The temperature of the reaction system is raised to 80°C within 40 minutes, and then the second part of formaldehyde 50 g is dropped into the reactor at an appropriate drop rate using a drop pump, and kept stirring for 50 minutes;

[0037] S4: Add 100g of papermaking waste and 50g of deionized water, keep stirring for 90min;

[0038] S5: Use a dripping pump to drop 10 g of the third part of formaldehyde into the reactor at an appropriate dropping rate, ...

Embodiment 3

[0041] Prepare the modified phenolic resin adhesive according to the following steps:

[0042] S1: Add 10g of phenol and 1g of sodium hydroxide into the reaction kettle, start stirring to mix the reactants at the bottom of the kettle evenly, raise the temperature of the reaction system to 50°C within 30 minutes, and keep stirring for 30 minutes;

[0043] S2: Drop the first part of formaldehyde 14g into the reaction kettle at an appropriate drop rate by using a drop pump, and keep stirring for 30 minutes;

[0044] S3: The temperature of the reaction system is raised to 80°C within 40 minutes, and then the second part of formaldehyde 4g is dropped into the reactor at an appropriate drop rate using a drop pump, and kept stirring for 50 minutes;

[0045] S4: Add 150g of papermaking waste and 200g of deionized water, keep stirring for 90min;

[0046] S5: Use the dripping pump to drip the third part of formaldehyde 2g into the reaction kettle at an appropriate dropping rate, and ke...

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Abstract

The invention relates to a preparation method of a modified phenolic resin adhesive and a product of the modified phenolic resin adhesive. The preparation method comprises the steps as follows: addingphenol and a catalyst to a reactor, increasing the temperature to 40-50 DEG C, and performing stirring at constant temperature for a first time period; slowly adding first part of formaldehyde, and performing stirring at constant temperature for a second time period; increasing the temperature to 70-100 DEG C, slowly adding second part of formaldehyde, and performing stirring at constant temperature for a third time period; adding papermaking waste and deionized water and performing stirring at constant temperature for a fourth time period; slowly adding third part of formaldehyde and performing stirring at constant temperature for a fifth time period; cooling the reaction system to 25 DEG C, performing stirring at constant temperature for a sixth time period and performing discharging. The used papermaking waste can be directly used without any treatment, reduction of the production cost can be facilitated, and biomass resources can be efficiently utilized. Besides, key indexes of the modified phenolic resin adhesive such as free phenolic aldehyde content and bonding strength conform to the national standard.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a modified phenolic resin adhesive, and also relates to a modified phenolic resin adhesive prepared by the preparation method. Background technique [0002] In 2010, the world's phenolic resin production was about 4.8 million tons, of which phenolic resin adhesives accounted for about 33%. As we all know, China is the largest producer of wood-based panels in the world. In 2011, the output of wood-based panels in China reached 235 million cubic meters, and the consumption of wood adhesives was about 10 million tons, of which phenolic, urea-formaldehyde, and melamine-formaldehyde resins were the main ones. Due to its unique network cross-linked molecular structure, phenolic resin has the advantages of high bonding strength, good water resistance and good weather resistance. However, with the increasing shortage of petroleum resources a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J161/14C08G8/28
CPCC08G8/28C09J161/14
Inventor 施晓旦孙海强赵吉郑璐
Owner SHANGHAI CHANGFA NEW MATERIAL CO LTD
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