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Water-soluble non-formaldehyde wood adhesive and method for preparing same

A wood adhesive, water-soluble technology, applied in the direction of adhesives, wood processing appliances, wood veneer bonding, etc. The effect of high strength, fast strength building, and simple preparation method

Inactive Publication Date: 2012-09-05
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a water-soluble formaldehyde-free wood adhesive to solve the problem that most of the current adhesives contain formaldehyde, but the initial viscosity and bonding strength of low-aldehyde adhesives are not ideal.

Method used

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  • Water-soluble non-formaldehyde wood adhesive and method for preparing same

Examples

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Effect test

Embodiment 1

[0021] Example 1 Preparation of water-soluble formaldehyde-free wood adhesive

[0022] Utilize the present invention to prepare water-soluble formaldehyde-free wood adhesive, first weigh raw materials according to the following parts by weight: starch 300, distilled water 860, acrylamide 80, glutaraldehyde 35, p-toluenesulfonic acid 1, azobisisobutyronitrile 30 .

[0023] All raw materials used in the present invention can be purchased commercially.

[0024] Mix the above raw materials evenly to obtain the prepared adhesive mother liquor, which is added into a three-necked flask. Heat in an oil bath, control the temperature at 80°C, stir mechanically, and react for 2 hours to obtain a water-soluble formaldehyde-free wood adhesive.

Embodiment 2

[0025] Embodiment 2 prepares water-soluble formaldehyde-free wood adhesive

[0026] Using the present invention to prepare water-soluble formaldehyde-free wood adhesive, firstly weigh the raw materials according to the following parts by weight: starch 300, distilled water 860, acrylamide 70, glutaraldehyde 35, p-toluenesulfonic acid 1, cerium ammonium nitrate 30.

[0027] Mix the above raw materials evenly to obtain the prepared adhesive mother liquor, which is added into a three-necked flask. Heat in an oil bath, control the temperature at 80°C, stir mechanically, and react for 1 hour to obtain a water-soluble formaldehyde-free wood adhesive.

Embodiment 3

[0028] Example 3 Preparation of water-soluble formaldehyde-free wood adhesive

[0029] Using the present invention to prepare water-soluble formaldehyde-free wood adhesive, firstly weigh the raw materials according to the following parts by weight: starch 400, distilled water 860, acrylamide 60, glutaraldehyde 35, p-toluenesulfonic acid 1, ammonium persulfate 30.

[0030] Mix the above raw materials evenly to obtain the prepared adhesive mother liquor, which is added into a three-necked flask. Heat in an oil bath, control the temperature at 60°C, stir mechanically, and react for 2 hours to obtain a water-soluble formaldehyde-free wood adhesive.

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Abstract

The invention provides a water-soluble non-formaldehyde wood adhesive which is prepared from raw materials according to weight by part as follows: 200-600 parts of starch, 500-1000 parts of distilled water, 20-400 parts of water-soluble olefin grafting monomer, 10-200 parts of cross-linking agent, 1-2 parts of para-toluenesulfonic acid, and 10-70 parts of polymerization reaction catalyst. The invention also discloses a method for preparing the adhesive, specifically comprising the following steps of: weighing all of the raw materials according to the proportions, mixing the raw materials together evenly, and in the mechanical stirring state, causing the mixture to continuously react for 1-2 h at 60-80 DEG C, thereby obtaining the water-soluble non-formaldehyde wood adhesive. The adhesive disclosed by the invention is a water-soluble adhesive free of formaldehyde; the water-soluble olefin monomer is used for grafting, and the bonding of wood materials can be achieved through grafting and cross-linking on the surface of wood powder; the bonding strength is high; the bonding can be strengthened through microwaves or heating; the preparation method is simple; the adhesive has excellent properties such as good storage stability and quick strength building; and the adhesive can be widely applied to the fields of wood joining, artificial plate and the like.

Description

technical field [0001] The invention relates to an adhesive, in particular to a water-soluble formaldehyde-free wood adhesive and a preparation method thereof. Background technique [0002] Traditional adhesives mainly include urea-formaldehyde glue (CN1621477; CN1718661; CN101565594), emulsion glue (CN1415684) and the like. [0003] Urea-formaldehyde glue has the advantages of cheap price, fast curing speed, no color, good mixing with water, and convenient use. It is widely used in the manufacture of wood-based panels. However, the presence of residual formaldehyde in urea-formaldehyde glued panels made by traditional techniques and formulas The problem of exceeding the standard is the long-term release of free formaldehyde. Formaldehyde is recognized as a potential carcinogen in the world. With the strengthening of people's awareness of environmental protection, the development of low-formaldehyde or formaldehyde-free adhesives has become one of the main development direc...

Claims

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Application Information

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IPC IPC(8): C09J151/02C08F251/00B27D1/04
Inventor 段久芳李建章
Owner BEIJING FORESTRY UNIVERSITY
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