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 t

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

Example Embodiment

[0029] Example 1

[0030] Add 200.0g of phenol to a 2500mL five-necked flask equipped with PTFE stirring, spherical condenser, and tantalum alloy temperature sensor. The temperature is raised to 60~65℃, and 100.0g of sulfonated bamboo pulp alkali lignin and 6.0 are added in sequence. g trifluoropropionic acid, 9mol / L sulfuric acid 24.0g, 50.0g sulfonated bamboo pulp alkali lignin, heat preservation reaction 10min, heat up to 80~85℃, add 75.0g sulfonated bamboo pulp alkali lignin, heat preservation reaction 5min, Then add 75.0g of sulfonated bamboo pulp alkali lignin, raise the temperature to 105~115℃, keep the temperature for 30min, quickly cool to below 45℃, add 193.3g lye (58.0g sodium hydroxide dissolved in 135.3g water), water 125.0g, incubate at 35~55℃ and react for 10min, add 300.0g formaldehyde and 12.0g acetaldehyde, slowly increase the temperature to 90℃, add 132.0g formaldehyde and 5.4g acetaldehyde, keep the reaction at 90℃ for 10min, then add formaldehyde 75.0 g. Ace...

Example Embodiment

[0037] Example 2

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

Example Embodiment

[0041] Example 3

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

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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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