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Preparation method for formaldehyde-free protein adhesive

An adhesive and protein technology, which is applied in the field of preparation of low-cost and environment-friendly protein adhesives, can solve the problems of poor water resistance, complicated hot pressing process and high cost, and achieves the effects of good reproducibility, superior market prospect and low cost.

Inactive Publication Date: 2010-11-03
青岛生物能源与过程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of formaldehyde-free protein adhesive to solve the problems of poor water resistance, high cost and complicated hot-pressing process of existing protein adhesives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 100g of water to the reaction kettle, slowly add 100g of defatted cottonseed meal while stirring at room temperature, stir for 60min, and make it evenly mixed; add 2g of citric acid, and react for 60min at room temperature; add 100g of polyethyleneimine resin, and react for 60min at room temperature ; Add 0.5g of sodium nitrite and continue to stir for 40 minutes to obtain a formaldehyde-free protein adhesive.

Embodiment 2

[0027] Add 200g of water to the reaction kettle, control the temperature at 30°C, slowly add 100g of wheat gluten powder under stirring, stir for 40min, make it evenly mixed; raise the temperature to 40°C, add 4g of boric acid, react for 40min; add 10g of bisphenol A type Epoxy resin water emulsion, heat up to 35°C for 40 minutes; cool down to room temperature, add 2g of sodium tetraborate, and continue stirring for 20 minutes to obtain a formaldehyde-free protein adhesive.

Embodiment 3

[0029] Add 50g of water and 200g of polyamide epichlorohydrin resin into the reaction kettle, control the temperature at 30°C, slowly add 40g of peanut protein and 50g of soybean meal under stirring, stir for 40min to make it evenly mixed; raise the temperature to 35°C, add 10g of oxalic acid , reacted for 20 minutes; lowered to room temperature, added 0.5 g of sodium nitrite, and continued to stir for 20 minutes to obtain a formaldehyde-free protein adhesive.

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Abstract

The invention discloses a preparation method for a formaldehyde-free protein adhesive, mainly comprising the following steps: 1) adding a protein-containing raw material and water and stirring at room temperature; 2) adding acidity-adjusting agent for reaction at 20-40 DEG C; 3) adding enhancer for reaction at 20-50 DEG C; and 4) adding preservative and stirring at room temperature to obtain the formaldehyde-free protein adhesive. In the invention, the adhesive is prepared based on protein-containing by-products of plants or animals, has the characteristics of low cost, wide source, renewability and the like, does not contain formaldehyde, has no toxicity, is environmental friendly and has superior market prospect. In addition, the existing degreased miscellaneous meal for low value-added product of animal feed, fertilizers and the like can be developed into high value-added products, thus providing a new way for development of environmental-friendly biomass-based wood adhesive and resource utilization of industrial by-products.

Description

technical field [0001] The invention relates to a preparation method of a formaldehyde-free bio-based adhesive, in particular to a preparation method of a low-cost environment-friendly protein adhesive. Background technique [0002] In 2007, my country's wood-based panel output reached 88.39 million m 3 , 8 million tons of adhesives (solid content 100%) are used, and the raw materials are all derived from non-renewable fossil products. With the rising prices of fossil resources and concerns about the shortage of petroleum resources, finding the use of renewable resources to replace fossil products as raw materials for the preparation of adhesives has become a key issue that needs to be solved urgently. At the same time, wood-based panel products are widely used in interior decoration. With the increasing awareness of environmental protection, people pay more and more attention to the amount of formaldehyde released from wood-based panels. [0003] Formaldehyde is a potenti...

Claims

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Application Information

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IPC IPC(8): C09J189/00C09J11/08
Inventor 康宁穆有炳宫瑞英李建忠
Owner 青岛生物能源与过程研究所
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