Unlock instant, AI-driven research and patent intelligence for your innovation.

Soybean protein adhesive and preparation method thereof

A soybean protein and adhesive technology, applied in the field of wood adhesives, can solve problems such as poor water resistance, low bonding strength, and failure to meet technical index requirements, and achieve the effects of simple process, low cost, and elimination of the influence of formaldehyde

Inactive Publication Date: 2010-08-18
WUHAN DIYUAN ADHESIVE
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, soybean protein adhesives, which were previously replaced by formaldehyde-based adhesives due to their low bonding strength and poor water resistance, have received renewed attention.
However, low bonding strength and poor water resistance are still the main problems to be solved. The existing soybean protein adhesives cannot meet the technical index requirements of urea-formaldehyde resin in the national standard GB / T14732-2006

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Soybean protein adhesive and preparation method thereof
  • Soybean protein adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 1500 parts of water to a stirring reactor with temperature control, start stirring, and control the temperature at 30°C, slowly add 100 parts of defatted soybean protein powder (45% protein content, 82% dispersion index), and stir for 30 minutes Make it evenly distributed. Then add 12 parts of sodium hydroxide lye with a hydroxide ion concentration of 2 mol / L, react for 20 minutes, stop stirring, and stand still for 30 minutes. Use a horizontal centrifuge (speed ≥ 4000 rpm) to separate the supernatant, discard the precipitate (the precipitate can be used as feed), put the supernatant into the reaction kettle, heat to 40°C, and add hydrogen ions under stirring The concentration is 25 parts of 2mol / L hydrochloric acid solution to make the precipitation complete, stop stirring, and stand still for 1 hour. The precipitate was then separated with a horizontal centrifuge and the supernatant was discarded. Put the precipitate in a reaction kettle, add 150 parts of water,...

Embodiment 2

[0030] Add 1,000 parts of water to a stirred reactor with temperature control, start stirring, and control the temperature at 40°C, slowly add 100 parts of defatted soybean protein powder (50% protein content, 85% dispersion index), and stir for 30 minutes Make it evenly distributed. Add 15 parts of potassium hydroxide with a hydroxide ion concentration of 2 mol / L, react for 40 minutes, stop stirring, and stand still for 30 minutes. Use a horizontal centrifuge (speed ≥ 4000 rpm) to separate the supernatant, discard the precipitate (the precipitate can be used as feed), put the supernatant into the reaction kettle, heat to 40°C, and add hydrogen ions under stirring The concentration is 30 parts of 1mol / L sulfuric acid solution to make the precipitation complete, stop stirring, and stand still for 1 hour. The precipitate was then separated with a horizontal centrifuge and the supernatant was discarded. Put the precipitate in a reaction kettle, add 150 parts of water, control t...

Embodiment 3

[0032] Add 1500 parts of water to a stirring reactor with temperature control, start stirring, and control the temperature at 30°C, slowly add 100 parts of defatted soybean protein powder (45% protein content, 82% dispersion index), and stir for 30 minutes Make it evenly distributed. Then add hydroxide ion concentration and be 12 parts of mixed lyes of 2mol / L sodium hydroxide and potassium hydroxide, react for 20 minutes, stop stirring, stand still for 30 minutes. Use a horizontal centrifuge (speed ≥ 4000 rpm) to separate the supernatant, discard the precipitate (the precipitate can be used as feed), put the supernatant into the reaction kettle, heat to 40°C, and add hydrogen ions under stirring The concentration is 25 parts of 2mol / L phosphoric acid solution to make the precipitation complete, stop stirring, and stand still for 1 hour. The precipitate was then separated with a horizontal centrifuge and the supernatant was discarded. Put the precipitate in a reaction kettle,...

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
Login to View More

PUM

PropertyMeasurementUnit
dispersityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a soybean protein adhesive prepared from the raw materials comprising the following components in parts by weight: 100 parts of defatted soybean flour, 1000-1500 parts of water, 30-35 parts of aqueous alkali, 25-30 parts of acid solutions and 3-6 parts of anion surfactants. The soybean protein adhesive is prepared by using the method comprising the following steps of: uniformly mixing the defatted soybean flour and the water and purifying the mixture into isolated protein through the process of alkali dissolution and acid precipitation; then carrying out combined modification on the isolated protein by using alkali and the anion surfactants; and adding preservatives. In the method, the alkali and the anion surfactants are used for combined modification, the main raw material is the defatted soybean flour which has wide source and low cost, thus, the modified soybean protein adhesive has the characteristics of no toxicity and environmental protection. Meanwhile, because the proper preservatives are added in the adhesive, the soybean protein adhesive can be preserved for 15-20 days at room temperature. The preparation method has the advantages of simple process, environmental protection and suitability for industrial production.

Description

technical field [0001] The invention belongs to the field of wood adhesives, specifically a soybean protein adhesive, and also relates to a preparation method of the adhesive. Background technique [0002] Wood adhesive is one of the main raw materials in the wood industry, which determines the quality and price of wood processed products. At present, formaldehyde-based adhesives still dominate the wood adhesives. However, the formaldehyde volatilized from formaldehyde-based adhesives pollutes the environment and endangers health. Long-term inhalation of a small amount of formaldehyde can cause chronic poisoning, mucosal hyperemia, skin irritation, allergic dermatitis, nail keratosis and fragility, nail bed fingertip pain, general headache, fatigue, poor appetite, palpitations, insomnia, weight loss and Autonomic disorders and other symptoms. And the raw materials of many formaldehyde-based adhesives also depend on petrochemical products, which seriously restricts the dev...

Claims

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/00
Inventor 范建华
Owner WUHAN DIYUAN ADHESIVE