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Preparation method of soybean protein-based two-component adhesive for wood

A technology of wood adhesive and soybean protein, which is applied in the direction of carboxyl rubber adhesive, adhesive, asphalt material adhesive, etc., can solve the problems of low cohesive force, inability to adapt to modern large-scale industrial production, poor water resistance, etc., to achieve Enhanced adhesion, reduced water absorption, and high conjunctiva strength

Inactive Publication Date: 2019-07-05
常州五荣化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem to be solved by the present invention: Aiming at the problems that the soybean protein adhesives in the existing market have low cohesive force, poor water resistance and cannot adapt to modern large-scale industrial production, a soybean protein-based two-component wood is provided Adhesive preparation method

Method used

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  • Preparation method of soybean protein-based two-component adhesive for wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Knead the pretreated steel wire and cable fiber to obtain a high-strength weather-resistant ship cable. The preparation steps of the pretreatment steel wire are: evenly coating the surface of the steel wire with urotropine, and drying naturally to obtain the pretreatment steel wire. The cable fiber is mixed evenly with sodium lauryl sulfate, 40% sodium hydroxide solution and 40% calcium hydroxide according to the mass ratio of 1:2:2 to obtain the mixed modification solution; according to the mass ratio of 1 : 5 mix soybean protein powder and deionized water, stir in the water bath for 20min at a water bath temperature of 50°C and at a stirring speed of 200r / min to obtain a mixed solution, add the mixed modifying solution to the mixed solution at a mass ratio of 1:10 , and continue stirring in a water bath for 1 hour to obtain the base liquid; in parts by weight, weigh 20 parts of the base liquid, 1 part of acrylic acid, 1 part of carboxymethyl cellulose, and 1 part of N...

Embodiment 2

[0033] According to the mass ratio of 1:2:2, the sodium lauryl sulfate, the mass fraction of 40% sodium hydroxide solution and the mass fraction of 40% calcium hydroxide are mixed evenly to obtain the mixed modified solution; according to the mass ratio of 1:5 Mix soybean protein powder and deionized water, and stir in a water bath at a temperature of 55°C and a stirring speed of 250r / min for 25 minutes to obtain a mixed solution. Add a mixed modifying solution to the mixed solution at a mass ratio of 1:10, and continue Stir in a water bath for 1.5 hours to obtain the base liquid; in parts by weight, weigh 25 parts of the base liquid, 5 parts of acrylic acid, 3 parts of carboxymethyl cellulose, 2 parts of N,N'-methylenebisacrylamide, 0.6 parts of ammonium persulfate, 3 parts of urea, 0.2 parts of 2-mercaptoethanol, 2 parts of acetone, 7 parts of absolute ethanol, 40 parts of deionized water, gelatinize the base liquid at a temperature of 55°C for 7 minutes to obtain a paste Fo...

Embodiment 3

[0035] According to the mass ratio of 1:2:2, the sodium lauryl sulfate, the mass fraction of 40% sodium hydroxide solution and the mass fraction of 40% calcium hydroxide are mixed evenly to obtain the mixed modified solution; according to the mass ratio of 1:5 Mix soybean protein powder and deionized water, stir in a water bath at a temperature of 60°C and a stirring speed of 300r / min for 30 minutes to obtain a mixed solution, add a mixed modifying solution to the mixed solution at a mass ratio of 1:10, and continue Stir in a water bath for 2 hours to obtain the base liquid; in parts by weight, weigh 30 parts of the base liquid, 10 parts of acrylic acid, 5 parts of carboxymethyl cellulose, 3 parts of N,N'-methylenebisacrylamide, 0.7 1 part of ammonium persulfate, 5 parts of urea, 0.3 part of 2-mercaptoethanol, 3 parts of acetone, 10 parts of absolute ethanol, 50 parts of deionized water, and gelatinize the base liquid at 60°C for 10 minutes to obtain gelatinization Liquid A, a...

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Abstract

The invention relates to a preparation method of a soybean protein-based two-component adhesive for wood, and belongs to the technical field of adhesives. According to the method provided by the invention, after soybean protein is subjected to alkali modification, the modified soybean protein is grafted with carboxymethyl cellulose and acrylic acid to be used as a main agent of the adhesive, and the main agent, asphalt and an carboxylated styrene-butadiene emulsion are used to prepare the adhesive; the prepared adhesive has good water resistance and cohesiveness, the carboxylated styrene-butadiene emulsion has a very strong water-reducing effect, higher adhesion stress and film strength, and the carboxylated styrene-butadiene emulsion can reduce large pores in the adhesive and refine the pore structure, so that the water absorption rate of the adhesive is greatly reduced, and the water saturation strength is greatly improved; and the acrylic acid is grafted on the modified soybean protein, when the soybean protein-based two-component adhesive for the wood is cured, a hydrophobic film with hydrophobicity is formed, so that external moisture can be effectively isolated, the purpose of water resistance is achieved, and the adhesion stress is also enhanced.

Description

technical field [0001] The invention relates to a preparation method of a soybean protein-based two-component wood adhesive, which belongs to the technical field of adhesives. Background technique [0002] Plywood (Plywood), a kind of wood-based panel, commonly used plywood has three-plywood, five-plywood and seven-plywood and so on. Compared with other board materials, plywood has less difference in mechanical properties. Plywood can also improve the utilization rate of wood, which is an effective way to save wood. Plywood is a furniture material and is also used for aircraft, ships, trains, automobiles, construction and packing boxes. [0003] Chemical classification of wood adhesives. Adhesives widely used in the production of plywood include uric acid resin adhesive (UF), aldehyde resin adhesive (PF), isocyanate adhesive (MDI) and melamine modified uric acid resin adhesive (MUF). etc., and its raw materials mainly come from fossil resources. In recent years, with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/00C09J195/00C09J113/02C09J101/28
CPCC08L2205/035C09J151/00C08L95/00C08L13/02C08L1/286
Inventor 林正脉
Owner 常州五荣化工有限公司
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