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Acid-salt-alkali combined modified soya glue adhesive and method of producing the same

A soybean adhesive and modification technology, which is applied in the preparation of adhesives, animal glue or gelatin, and the types of adhesives, can solve the problems of high cost, pollution and low proportion, and achieve low cost, strong operability, and high technology. simple effect

Inactive Publication Date: 2011-08-10
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent (CN 1793270) discloses "a powder bioadhesive based on soybean protein isolate", the raw material used in it is soybean protein isolate, and the cost is higher than that of defatted soybean flour
It can be seen from the examples of the patent that the proportion of bean flour in the modified bean gum is low (<10%), and the content of aldehyde crosslinking agent is very high (greater than that of bean flour), so the modified bean gum contains aldehydes and phenols. and other toxic substances will still pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 40 parts of water into the reaction kettle with a temperature-controllable stirrer, start the stirrer, control the temperature at 30°C, slowly add 10 parts of defatted soybean flour, stir for 35 minutes, and make it evenly mixed; add 1.6 parts of concentrated hydrochloric acid and react for 2 minutes; Add 4.0 parts of 0.005 g / mL magnesium chloride aqueous solution, and react for 35 minutes; then add 4.0 parts of 30% sodium hydroxide solution by weight, continue stirring for 20 minutes, and discharge.

Embodiment 2

[0038] Add 30 parts of water into the reaction kettle with a temperature-controllable stirrer, start the stirrer, control the temperature at 35°C, slowly add 8 parts of defatted soybean flour, stir for 45 minutes, and make it evenly mixed; add 2.0 parts of concentrated hydrochloric acid and react for 5 minutes; Add 2.2 parts of 0.002 g / mL ferric chloride aqueous solution, and react for 25 minutes; then add 10.0 parts of 20% sodium hydroxide solution by weight, continue stirring for 15 minutes, and discharge.

Embodiment 3

[0040] Add 60 parts of water into the reaction kettle with a temperature-controllable stirrer, start the stirrer, control the temperature at 20°C, slowly add 16 parts of defatted soybean flour, stir for 50 minutes, and make it evenly mixed; add 1.2 parts of concentrated nitric acid, and react for 3 minutes; Add 2.0 parts of 0.02 g / mL barium chloride aqueous solution, heat up to 35°C, and react for 20 minutes; then add 3.0 parts of 40% potassium hydroxide solution by weight, continue stirring for 30 minutes, and discharge.

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Abstract

The invention provides a soybean adhesive modified by acid, alkali and salt jointly as well as a preparation method thereof; the soybean adhesive comprises materials as follows: degreased pulse flour, water, acid, metal chloride(salt) and alkali; the preparation technique thereof is as follows: the degreased pulse flour is uniformly mixed with the water and the acid is added under certain temperature; then the metal chloride(salt) is added for reaction for a period of time; and finally the alkali is added for reaction for a period of time to obtain the adhesive. The water-proof glue intensityof the soybean adhesive prepared by the method is equal to that of Lauxite glue; the glue intensity of poplar veneer check bars prepared by the soybean adhesive is equal to or larger than 0.7MPa after being dipped in hot water of 63 DEG C plus or minus 3 DEG C for 3h, and does not crack after being boiled for 12 hours by boiled water; moreover, the material cost is low; the preparation technique is simple; and the soybean adhesive is innocuous and environment-friendly. The soybean adhesive is suitable to producing various wood processed products. The adhesive can be prepared into powder agents after being dried by spraying or freezing.

Description

technical field [0001] The invention belongs to the technical field of preparation of wood adhesives, and more specifically relates to a soybean adhesive modified by combination of acid and alkali and a preparation method thereof. Background technique [0002] With the development of the economy and the progress of human civilization, protecting the environment, saving energy, and coexisting harmoniously with nature have become the main theme of the development of science and technology. However, the adhesives produced all over the world still use petrochemical products as the main raw materials, especially formaldehyde-based adhesives still occupy a dominant position, seriously polluting the environment and endangering people's health. Therefore, it is urgent to develop an environmentally friendly adhesive that is pollution-free from production to application and has no discharge of "three wastes". Soybean adhesive is gradually becoming a research hotspot for scientists be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J189/00
Inventor 林巧佳陈奶荣
Owner FUJIAN AGRI & FORESTRY UNIV
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