Method for preparing natural nontoxic adhesive for wood use

An adhesive, a natural technology, applied in the chemical field, can solve the problems of limited application prospects, poisonous and harmful formaldehyde, and achieve the effect of standardized process, low price and easy operation

Inactive Publication Date: 2005-01-05
武汉正轩宇生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former two contain formaldehyde, which is poisonous and harmful to humans; the latter is relatively expensive, and has not yet been solved in terms of water resistance, frost resistance, and anti-aging, which limits its application prospects

Method used

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  • Method for preparing natural nontoxic adhesive for wood use

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Embodiment Construction

[0016] The preparation method of natural nontoxic adhesive for wood involved in the present invention, its specific implementation method is as follows:

[0017] A. The preparation of main ingredients, first take 1000 grams of cornstarch and 1800 grams of water and put them into the container to stir, and emulsify to make the water and oil phase dissolve into a white starch aqueous solution; secondly, oxidize and modify, take 50 grams of sodium hypochlorite as an oxidant and add it to the above container , so that part of the hydroxyl groups on the starch molecules are oxidized to aldehyde groups or carboxylic acids; third, etherification modification, take NaOH (gelatinization) as 50 grams and add starch solution, add chloroacetic acid 50 grams on the basis of alkali gelatinization gram, make it form starch---sodium chloroacetate; Its four, esterification modification, on the basis of above-mentioned reaction, add 80 grams of vinyl acetates, make the hydroxyl on the starch mol...

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Abstract

A natural non-toxic adhesive for wood used as building material or decorative material contains main material which is prepared from corn or cassava starch, water and assistant through emulsifying, oxidizing, etherifying, esterifying and cross-linking, polyvinyl alcohol as intensifer, solution of sodium polyacrylate as stabilizer, assistant and water. Its advantages are no poison and irritation, good water-proof nature, high drying speed and adhesion.

Description

technical field [0001] The invention relates to a method for making natural adhesives from animal and plant materials, in particular to a method for preparing natural non-toxic adhesives for wood. The invention belongs to the technical field of chemistry. Background technique [0002] Since ancient times, there have been countless classic deeds of making natural adhesives from animal and plant materials and using them for sealing, bonding and material protection of building materials. The construction glue used in the ancient Great Wall of China is made of glutinous rice and lime; the Egyptians used natural resin as a sealing and protective material for mummification. Until the 1960s and 1970s, the production of plywood, wooden furniture, musical instruments, arts and crafts, etc. were inseparable from the bonding of natural glue. Such as fish gelatin, bone glue, skin glue and soybean protein glue, etc. are widely used because of their cheap price, read...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J103/02
Inventor 陈彩良郑正炯
Owner 武汉正轩宇生物科技有限公司
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