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Preparation method of lignin-modified phenolic resin wood adhesive

A wood adhesive and phenolic resin technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems that are not conducive to industrial production, the resin bonding strength is not high, and increase the production process. , to achieve the effect of realizing resource management, increasing production process and low price

Inactive Publication Date: 2014-10-08
DEHUA TB NEW DECORATION MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above patents, the lignin needs to be modified and reused first, which increases the production process, which is not conducive to industrial production, and the amount of lignin substituted for phenol is not high, and the bonding strength of the prepared resin is not high.

Method used

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  • Preparation method of lignin-modified phenolic resin wood adhesive
  • Preparation method of lignin-modified phenolic resin wood adhesive
  • Preparation method of lignin-modified phenolic resin wood adhesive

Examples

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preparation example Construction

[0026] A kind of preparation method of lignin modified phenolic resin wood adhesive, it comprises the following steps:

[0027] (1) 5-14 mass parts of industrial alkali lignin, 6-12 mass parts of formaldehyde solution and 10-19 mass parts of phenol with a mass concentration of 35-40% are added in the reactor equipped with agitator and condenser tube, and start Stir, turn on the heating and raise the temperature to 80-90°C within 35-45min, keep warm for 15-20min;

[0028] (2) Cool the product reacted in step (1) to below 50°C, add 30-35 parts by mass of formaldehyde solution with a mass concentration of 35-40% and 8-12 parts by mass of alkaline solution, and heat up within 35-45min To 80-90°C, keep warm for 16-24min;

[0029] (3) The product reacted in step (2) is cooled to 65-75° C., adding 3-7 parts by mass of formaldehyde solution and 1-3 parts by mass of epichlorohydrin with a mass concentration of 35-40%, at this temperature Reaction 35-45min;

[0030] (4) Add 10-18 par...

Embodiment 1

[0031] Embodiment 1: a kind of preparation method of lignin modified phenolic resin wood adhesive, it comprises the following steps:

[0032] (1) Add 10 parts by mass of industrial alkali lignin, 9 parts by mass of formaldehyde solution with a mass concentration of 37%, and 15 parts by mass of phenol into a reactor equipped with a stirrer and a condenser, start stirring, turn on heating, and heat up within 40 minutes To 85 ℃, keep warm for 17 minutes;

[0033] (2) Cool the product reacted in step (1) to below 50°C, add 32 parts by mass of formaldehyde solution with a mass concentration of 37% and 10 parts by mass of an alkaline solution, heat up to 85°C within 40 minutes, and keep the temperature for 20 minutes;

[0034] (3) The product reacted in step (2) was cooled to 70° C., 5 parts by mass of formaldehyde solution with a mass concentration of 37% and 2 parts by mass of modifier were added, and reacted at this temperature for 40 minutes;

[0035] (4) Add 14 parts by mass o...

Embodiment 2

[0036] Embodiment 2: a kind of preparation method of lignin modified phenolic resin wood adhesive, it comprises the following steps:

[0037] (1) Add 5 parts by mass of industrial alkali lignin, 6 parts by mass of formaldehyde solution with a mass concentration of 35%, and 19 parts by mass of phenol into a reactor equipped with a stirrer and a condenser, start stirring, turn on heating, and heat up within 35 minutes To 90 ℃, keep warm for 15 minutes;

[0038] (2) Cool the product reacted in step (1) to below 50°C, add 35 parts by mass of formaldehyde solution with a mass concentration of 35% and 8 parts by mass of alkaline solution, heat up to 90°C within 35 minutes, and keep the temperature for 16 minutes;

[0039] (3) Cool the product reacted in step (2) to 65° C., add 3 parts by mass of formaldehyde solution with a mass concentration of 35% and 1 part by mass of a modifier, and react at this temperature for 35 minutes;

[0040] (4) Add 18 parts by mass of alkaline solution...

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Abstract

A preparation method of lignin-modified phenolic resin wood adhesive. The preparation method includes following steps: adding 5-14 parts by mass of industrial alkali lignin, 6-12 parts by mass of a formaldehyde solution with a mass concentration being 35-40%, and 10-19 parts by mass of phenol to a reactor having a stirrer and a condenser pipe, starting a stirring operation, stating a heating operation for increasing a temperature to 80-90 DEG C within 35-45 min, maintaining the temperature and carrying out a reaction for 15-20 min to obtain the lignin-modified phenolic resin wood adhesive.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly lignin-modified phenolic resin wood adhesive, which belongs to the technical field of wood adhesives. Background technique [0002] Lignin is a natural polymer that widely exists in vascular plants. As a renewable biomass resource, it exists in a huge amount in nature, and it is the second most natural polymer material after cellulose. . Lignin has aldehyde groups and phenol structural units, which can be used in the preparation of phenolic resins. As a big paper-making country, my country produces a large amount of paper-making black liquor every year. The main component of black liquor is industrial lignin, and its utilization rate is less than 10%. The rest is discharged into rivers or burned, which pollutes the environment and causes waste of resources. Therefore, the use of industrial lignin instead of phenol to prepare phenolic resin is of great significance in terms of ec...

Claims

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Application Information

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IPC IPC(8): C09J161/14C08G8/28
Inventor 程明娟詹先旭
Owner DEHUA TB NEW DECORATION MATERIAL CO LTD
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