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
7 Cites 31 Cited by

AI-Extracted 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...
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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.

Application Domain

Aldehyde/ketone condensation polymer adhesives

Technology Topic

Environmentally friendlyPhenols +6

Image

  • 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(9)
  • Comparison scheme(3)

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. Acetaldehyde 3.0g, keep at 94℃ for 40min, then add 93.0g formaldehyde and 3.6g acetaldehyde, slowly increase the temperature to 90℃ and keep the reaction, every 3~5min, measure its viscosity by inverted bubble method. After the viscosity reaches the requirement, stop heating, and add 450.0g of water, while rapidly cooling to below 50°C, and discharging to obtain the phenolic lignin adhesive.
[0031] Use the above-mentioned phenolic lignin adhesive, dilute the adhesive with water to a solid content of 26-28%, use the dipping process to sizing bamboo plywood, under the hot pressing conditions of 140-150℃, 15-20MPa, 1.5min/mm The preparation of bamboo plywood is carried out under.
[0032] The properties of the above-mentioned adhesives and plywood are shown in Table 1.

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, incubate at 90°C for 30min, then add 87.3g of formaldehyde, slowly increase the temperature to 94°C for incubation reaction, and measure its viscosity by inverted bubble method at intervals of 3 to 5 minutes. Stop heating when the inverted bubble viscosity meets the requirements. Add 350.0g of water, while rapidly cooling to below 50°C, and discharge the material to obtain a phenolic lignin adhesive.
[0039] Use the above-mentioned phenolic lignin adhesive, dilute the adhesive with water to a solid content of 28-30%, use the dipping process to sizing bamboo plywood, under the hot pressing conditions of 140-150℃, 15-20MPa, 1.5min/mm The preparation of bamboo plywood is carried out under.
[0040] The properties of the above-mentioned adhesives and plywood are shown in Table 1.

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 to 90℃ Insulation reaction, every 3~5min, measure its viscosity by inverted bubble method, when the inverted bubble viscosity reaches the requirement, stop heating, and add 400.0g of water, while rapidly cooling to below 50℃, discharge, then phenolic lignin is obtained adhesive.
[0043] Use the above-mentioned phenolic lignin adhesive, dilute the adhesive with water to a solid content of 25-28%, use the dipping process to sizing bamboo plywood, under the hot pressing conditions of 140-150℃, 15-20MPa, 1.5min/mm The preparation of bamboo plywood is carried out under.
[0044] The properties of the above-mentioned adhesives and plywood are shown in Table 1.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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