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Phenolate lignin tackiness agent and preparing method of phenolate lignin tackiness agent

A technology of phenolic lignin and adhesives, applied in the field of natural polymers, can solve the problems of inconvenient production and application of lignin-modified phenolic resin adhesives, affecting the application and popularization of lignin-modified phenolic resin adhesives, and slow curing reaction rate, etc. Achieve the effect of convenient construction, good storage stability and good fluidity

Inactive Publication Date: 2014-08-27
方红霞 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lignin-modified phenolic resin adhesive modified by these methods still has some problems, such as: poor storage stability, high viscosity, slow curing reaction rate, greatly reduced mechanical properties, especially the serious reduction in boiling water resistance, etc., and lignin The addition amount of the lignin-modified phenolic resin adhesive is low (less than 50%), because of the constraints of these factors, it brings inconvenience to the actual production and application of the lignin-modified phenolic resin adhesive, and affects the application and promotion of the lignin-modified phenolic resin adhesive.

Method used

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  • Phenolate lignin tackiness agent and preparing method of phenolate lignin tackiness agent
  • Phenolate lignin tackiness agent and preparing method of phenolate lignin tackiness agent
  • Phenolate lignin tackiness agent and preparing method of phenolate lignin tackiness agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 200.0g of phenol into a 2500mL five-neck flask equipped with polytetrafluoroethylene stirring, spherical condenser, and tantalum alloy temperature sensor, raise the temperature to 60-65°C, and add 100.0g of sulfonated bamboo pulp alkali lignin, 6.0 g trifluoropropionic acid, 24.0 g of sulfuric acid of 9 mol / L, 50.0 g of sulfonated bamboo pulp alkali lignin, heat preservation reaction for 10 minutes, heat up to 80-85 °C, add 75.0 g of sulfonated bamboo pulp alkali lignin, heat preservation reaction for 5 minutes, Then add 75.0g of sulfonated bamboo pulp alkali lignin, raise the temperature to 105-115°C, keep the temperature for 30 minutes, cool down rapidly to below 45°C, add 193.3g of lye (58.0g of sodium hydroxide dissolved in 135.3g of water), water 125.0g, keep warm at 35-55°C for 10min, add 300.0g of formaldehyde and 12.0g of acetaldehyde, slowly heat up to 90°C, add 132.0g of formaldehyde, 5.4g of acetaldehyde, keep warm at 90°C for 10min, then add formaldehyde ...

Embodiment 2

[0038] Add 125.0g of phenol to a 2500mL five-necked flask equipped with polytetrafluoroethylene stirring, a spherical condenser, and a tantalum alloy temperature sensor, raise the temperature to 75-80°C, and add 70.0g of sodium lignosulfonate and 9.0g of sodium lignosulfonate in sequence. Trifluoropropionic acid, 27.0g of 12mol / L sulfuric acid, 15.0g concentrated hydrochloric acid, 90.0g sodium lignosulfonate, keep warm for 15 minutes, heat up to 85-90°C, add 90.0g sodium lignosulfonate, keep warm for 10 minutes, Then add 70.0g sodium lignosulfonate, heat preservation reaction for 5min, then add 55.0g sodium lignosulfonate, heat up to 115~120℃, heat preservation reaction for 45min, rapidly cool to below 45℃, add lye 283.0g (85.0g Potassium hydroxide (dissolved in 198.0g of water), 125.0g of water, keep warm at 35-55°C for 20min, add 280.0g of formaldehyde, slowly heat up to 92°C, add 123.5g of formaldehyde, keep warm at 90°C for 15min, then add 70.0g of formaldehyde, heat pres...

Embodiment 3

[0042] Add 225.0g of phenol into a 2500mL five-necked flask equipped with polytetrafluoroethylene stirring, a spherical condenser, and a tantalum alloy temperature sensor, raise the temperature to 60-70°C, and add 100.0g of sodium lignosulfonate and 5.0g of sodium lignosulfonate in sequence. Trifluoropropionic acid, 20.0g concentrated hydrochloric acid, 60.0g sodium lignosulfonate, keep warm for 5min, heat up to 85~90℃, add 60.0g sodium lignosulfonate, keep warm for 10min, then add 55.0g lignosulfonate Sodium, heat up to 110-115°C, keep warm for 25 minutes, quickly cool down to below 45°C, add 213.0g of lye (64.0g sodium hydroxide dissolved in 149.0g of water), 125.0g of water, keep warm at 35-55°C After 15 minutes, add 330.0g of formaldehyde, slowly heat up to 85°C, add 145.0g of formaldehyde, keep it at 90°C for 30 minutes, then add 82.5g of formaldehyde, keep it at 90°C for 15 minutes, then add 104.5g of formaldehyde, slowly heat up to 90°C Insulation reaction, at intervals...

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Abstract

The invention discloses a phenolate lignin tackiness agent and a preparing method of the phenolate lignin tackiness agent. Under the normal pressure, phenol serves as a phenolate reagent, lignin and master and slave acid catalysts are added at a certain temperature at four to five times in sequence, the temperature is rose to 100 DEG C-130 DEG C, heat preservation reaction is carried out, cooling is carried out, basic catalysts are added, after the heat preservation reaction is carried out for a certain time, aldehydes materials are added at four times, heat preservation reaction is carried out at 80 DEG C-95 DEG C until the viscosity meets the requirement, water is added to adjust the solid content, and meanwhile rapid cooling is carried to enable the temperature to be lower than 50 DEG C, discharging is carried out, and then the phenolate lignin tackiness agent is obtained. Compared with a traditional phenolate lignin tackiness agent, the prepared phenolate lignin tackiness agent has the advantages that the replacement amount of the lignin to the phenol is as high as 50%-80%, and the cost can be reduced by about 40%. The phenolate lignin tackiness agent prepared with the method is safe, environmentally friendly, good in mobility and good in storage stability. Bamboo / wood plywood manufactured with the phenolate lignin tackiness agent has the good mechanics performance and the good hydrolytic resistance.

Description

technical field [0001] The invention belongs to the field of natural polymers, and in particular relates to a phenolized lignin adhesive and a preparation method thereof. Background technique [0002] Lignin is one of the three main components of plants (cellulose, lignin and hemicellulose), and in nature, it is the second most abundant natural polymer substance after cellulose, and lignin is a natural The only non-petroleum source that provides a near-infinite supply of renewable aromatic-based compounds. Lignin is mainly derived from the waste liquid of industrial paper pulping, which has the advantages of cheap, renewable and environmentally friendly. It is generally believed that lignin is a complex compound composed of aromatic ring structural units, and there are many functional groups in its structure, such as hydroxyl, methoxy, carbonyl, carboxyl, methyl and other functional groups, and their presence in the log lignin structure And the distribution is related to t...

Claims

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Application Information

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IPC IPC(8): C09J161/14C08G8/28C08H7/00
Inventor 方红霞吴强林晏秀男王永垒崔朋吴沁然韩信
Owner 方红霞
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