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A kind of normal temperature curing bio-oil starch adhesive for wood and preparation method thereof

A starch adhesive, room temperature curing technology, applied in the directions of adhesives, adhesive additives, graft polymer adhesives, etc., can solve the problems of high cost, less research on the room temperature curing of starch adhesives, etc., to improve Water resistance, good room temperature curing effect, the effect of reducing the number of hydroxyl groups

Active Publication Date: 2017-11-28
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, many starch adhesive modification methods mainly focus on improving the water resistance, bonding strength and storage stability of starch adhesives, while there are few studies on the normal temperature curing of starch adhesives.
At the same time, a large number of additives are added in the preparation process of starch adhesive, which leads to the problem of high cost of starch adhesive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A kind of preparation method that the present invention proposes wood solidifies bio-oil starch adhesive at room temperature, comprises the following steps:

[0028] The first step: After completely mixing 80-100 parts of bio-oil and 160-200 parts of absolute ethanol, add it to the bio-oil esterification reactor, add 8-10 parts of catalyst, and heat it in a constant temperature water bath at 50-60°C After 4-5 hours, cool down and discharge to obtain a bio-oil esterification product; then mix with 10-20 parts of vinyl acetate and 5-15 parts of butyl acrylate to obtain a grafted monomer mixture.

[0029] Step 2: Prepare 100 parts of starch with 140-160 parts of 0.3-0.5mol / L hydrochloric acid to form a starch emulsion with a mass fraction of 40%, pour it into the adhesive reaction kettle, and heat up to 50 within 10-15min. -55°C, and keep the temperature until the third step, add 2-4 parts of oxidizing agent, carry out acid hydrolysis and oxidative denaturation for 30-50 m...

Embodiment 1

[0033]The mass parts of each raw material component in the present embodiment are as follows: 120 parts of bio-oil, 160 parts of absolute ethanol, 8 parts of 732 strong acidic cation exchange resin catalyst, 100 parts of cornstarch, 140 parts of hydrochloric acid, 2 parts of ammonium persulfate oxidant, 12 parts 1 part of sodium alkyl sulfonate emulsifier, 10 parts of 1750 polyvinyl alcohol stabilizer, 0.3 parts of ammonium persulfate initiator, 10 parts of vinyl acetate, 15 parts of butyl acrylate.

[0034] The preparation method of the normal temperature curing bio-oil starch adhesive for wood of the present embodiment may further comprise the steps:

[0035] The first step: After completely mixing 80 parts of bio-oil and 160 parts of absolute ethanol, add it to the bio-oil esterification reactor, add 8 parts of catalyst, heat in a constant temperature water bath at 60°C for 4 hours, cool down and discharge to obtain bio-oil Oil esterification product; mixed with 10 parts of...

Embodiment 2

[0040] The mass parts of each raw material component in this embodiment are as follows: 120 parts of bio-oil, 180 parts of absolute ethanol, 9 parts of NKC-9 strongly acidic cation exchange resin catalyst, 100 parts of tapioca starch, 150 parts of hydrochloric acid, 3 parts of oxidizing agent, 2 parts of emulsifier , 20 parts of stabilizer, 0.5 parts of initiator, 15 parts of vinyl acetate, 10 parts of butyl acrylate.

[0041] The preparation method of the normal temperature curing bio-oil starch adhesive for wood of the present embodiment may further comprise the steps:

[0042] The first step: After completely mixing 90 parts of bio-oil and 180 parts of absolute ethanol, add it to the bio-oil esterification reactor, add 9 parts of NKC-9 strong acid cation exchange resin, and heat it in a constant temperature water bath at 55°C for 5 hours, the temperature was lowered and discharged to obtain the esterification product of bio-oil; and then mixed with 15 parts of vinyl acetate...

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Abstract

The invention discloses a normal-temperature-cured bio-oil starch adhesive for wood and a preparation method thereof, belonging to the technical field of adhesive preparation. The method adopts strong acidic cation exchange resin to catalyze the esterification reaction of bio-oil to obtain starch graft copolymerization Reactive monomers; modified starch by acidolysis oxidation, graft copolymerization and compounding to form the backbone of the main adhesive agent; by adding bio-oil, modify the chemical groups on the main agent skeleton of the adhesive, and at the same time act as fillers, anti-corrosion Agents and other additives, prepared into bio-oil starch adhesives. The starch adhesive has the advantages of normal temperature curing, environmental protection, low cost, good cohesiveness, strong water resistance and excellent storage stability.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, in particular to a method for preparing a normal-temperature-cured bio-oil starch adhesive for wood. Background technique [0002] Today, with the depletion of petroleum resources and the increasing awareness of environmental protection, it has become a trend to use cheap and easily available renewable natural polymer resources as the main raw material, adopt green new technology, and develop high-performance environmentally friendly adhesives. Starch adhesive has a wide range of raw materials, low price, non-toxic and harmless, and is environmentally friendly. It is considered to be one of the most potential adhesives and is widely used in non-structural glulam fields such as interior and home decoration. [0003] However, compared with synthetic resin adhesives, starch adhesives have disadvantages such as poor water resistance, poor storage stability, and low bonding strength, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/02C09J11/06C08F251/00C08F218/08C08F220/18C08B31/18
Inventor 常建民虞宇翔李婷婷任学勇姚思旭姚娟
Owner BEIJING FORESTRY UNIVERSITY
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