Bio-oil starch adhesive used for artificial board and preparation method

A starch adhesive and bio-oil technology, applied in adhesives, grafted polymer adhesives, oil/fat/wax adhesives, etc., can solve problems such as formaldehyde pollution, achieve high activity, reduce costs, and process stability Good results

Active Publication Date: 2015-01-21
BEIJING FORESTRY UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to propose a bio-oil starch adhesive for wood-based panels and a preparation method thereof, to prepare a bio-oil starch adhesive with environmental protection, low cost, good bonding performance, low viscosity and long pot life. A new type of starch-based adhesive for wood-based panels with a long and simple preparation process can replace the urea-formaldehyde resin widely used in the field of wood-based panels, and completely solve the serious formaldehyde pollution problem of wood-based panels.

Method used

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  • Bio-oil starch adhesive used for artificial board and preparation method
  • Bio-oil starch adhesive used for artificial board and preparation method

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preparation example Construction

[0022] The preparation method of above-mentioned bio-oil starch adhesive that the present invention proposes comprises the following steps:

[0023] The first step: Take 150 parts of 0.4-0.6mol / L hydrochloric acid into the reaction vessel, then add 80-120 parts of starch to prepare starch emulsion; within 10 minutes, raise the temperature to 50-65°C and keep the temperature until the third step, add 0.8- 2.4 parts of an oxidizing agent with a mass fraction of 10% were reacted for 30-60 minutes to obtain a primary modified starch emulsion.

[0024] Step 2: Add 10-30 parts of polyvinyl alcohol solution with a mass fraction of 8% to the primary modified starch emulsion, neutralize part of the hydrochloric acid with a 10% mass fraction of sodium hydroxide solution, and adjust the pH value to 4-5.5 within 15 minutes; 60 minutes Add 10-30 parts of acrylamide in five batches (each batch is 1 / 5 of the total amount), and then react for 30-60 minutes; then add 0.2-0.6 parts of oxidant, ...

Embodiment 1

[0028]The mass parts of each raw material component in this embodiment are as follows: 80 parts of corn starch, 150 parts of hydrochloric acid, 1 part of ammonium persulfate oxidizing agent, 10 parts of polyvinyl alcohol stabilizer, 10 parts of acrylamide, 20 parts of bio-oil, glyoxal curing agent 10 parts, 5 parts of MDI curing agent, 20 parts of flour filler;

[0029] The preparation method of bio-oil starch adhesive comprises the following steps:

[0030] Step 1: Add 150 parts of 0.4mol / L hydrochloric acid into the reaction vessel, then add 80 parts of cornstarch to make starch emulsion; raise the temperature to 50°C within 10 minutes and keep the temperature until the third step, add 0.8 parts of 10% ammonium persulfate solution, and react for 30 minutes to obtain a modified starch emulsion.

[0031] Step 2: Add 10 parts of 8% 1750-type polyvinyl alcohol solution to the primary modified starch emulsion, neutralize part of the hydrochloric acid with 10% sodium hydroxide so...

Embodiment 2

[0035] The mass parts of each raw material component in this embodiment are as follows: 100 parts of tapioca starch, 150 parts of hydrochloric acid, 2 parts of potassium persulfate oxidizing agent, 20 parts of polyvinyl alcohol stabilizer, 20 parts of acrylamide, 30 parts of bio-oil, glutaraldehyde curing agent 20 parts, 10 parts of PMDI curing agent, 30 parts of light calcium carbonate filler;

[0036] The preparation method of bio-oil starch adhesive comprises the following steps:

[0037] Step 1: Add 150 parts of 0.5mol / L hydrochloric acid to the reaction vessel, then add 100 parts of tapioca starch to make starch emulsion; within 10 minutes, raise the temperature to 55°C and keep the temperature until the third step, add 1.6 parts of 10% cassava starch Potassium persulfate solution was reacted for 45 minutes to obtain a primary modified starch emulsion.

[0038] Step 2: Add 20 parts of 8% 1788 polyvinyl alcohol solution to the primary modified starch emulsion, neutralize ...

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Abstract

The invention relates to a bio-oil starch adhesive used for an artificial board, which belongs to the artificial board adhesive technical field. In a preparation method of the adhesive, a composite denaturation method is employed for performing denaturation treatment on starch, hydrochloric acid and an oxidizing agent are added for acidolysis and oxidation denaturation on the starch, the starch molecular weight is reduced, the reaction activity is enhanced; a stabilizing agent is added, an acrylamide grafting monomer is employed to form a basic frame structure of an main agent of the adhesive; the bio-oil is added, the acid and an aldehyde substance in the bio-oil is used for modifying a chemical group in the frame structure to obtain the main agent of the adhesive; and a curing agent composed of dialdehyde and isocyanate as well as a filler are added to prepare the bio-oil starch adhesive. The bio-oil starch adhesive used for artificial board has the characteristics of green environmental protection, low cost, good glued joint performance, low viscosity, long working life and simple preparation technology, and can replace urea resin widely used in the current artificial board field and thoroughly solve the severe formaldehyde pollution problem of the artificial board product.

Description

technical field [0001] The invention belongs to the technical field of wood-based panel adhesives, in particular to a preparation method of a bio-oil starch adhesive for wood-based panels. technical background [0002] Urea-formaldehyde resin is the main type of glue used in wood-based panels in China, accounting for more than 90% of the glue used in wood-based panels. In recent years, with the enhancement of people's awareness of environmental protection and the improvement of national environmental protection regulations, the relatively serious formaldehyde pollution caused by urea-formaldehyde resins has made green and environmentally friendly biomass adhesives a research hotspot. Starch-based adhesives are cheap, the main raw materials are renewable, and are environmentally friendly. They have been industrially applied in the bonding of paper materials (such as corrugated boards, wallpapers, paper tubes, etc.), and have the potential to replace urea-formaldehyde resin ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/02C09J191/00C09J11/06C08F251/00C08B31/18
Inventor 常建民张继宗张琪王大张冯绍园许守强
Owner BEIJING FORESTRY UNIVERSITY
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