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Starch adhesive for environment-friendly timbers and preparation method thereof

A starch adhesive, an environmentally friendly technology, applied in the field of polymer science, can solve the problems of polluting the environment and endangering public health, and achieves the effects of no formaldehyde release, low cost, and strong water resistance

Inactive Publication Date: 2014-05-14
GUIZHOU LANTU NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, trialdehyde glue releases a large amount of formaldehyde in the process of production and use, which leads to environmental pollution and endangers public health. The negative impact of trialdehyde glue on the environment and human life during use has attracted widespread attention from all over the world.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 of the present invention: environment-friendly starch adhesive for wood, calculated in parts by weight, including 80 parts by weight of oxidized starch emulsion with a mass percentage concentration of 40%, 30 parts of comonomer, 10 parts of polyvinyl alcohol, 0.1 part Urea, 0.3 parts of sodium persulfate, 0.5 parts of sodium bisulfite, 2 parts of bentonite and 0.05 parts of methyl acrylate; the comonomer consists of 10 parts of acrylamide and 20 parts of methyl acrylate.

[0022] The preparation method of environmentally friendly starch adhesive for wood comprises the following steps:

[0023] Step 1) Preparation of oxidized starch emulsion: Add 200 parts of water to 50 parts of cornstarch to form a starch emulsion with a concentration of 40% by mass; control the temperature at 30-50°C, stir with a magnetic stirrer, and add 2.5 parts of sodium hypochlorite, in the reaction process, use 15% sodium hydroxide solution to adjust the pH value of the emulsion to ...

Embodiment 2

[0027] Embodiment 2 of the present invention: environmentally friendly starch adhesive for wood, calculated in parts by weight, including 100 parts by weight of oxidized starch emulsion with a concentration of 35%, 50 parts of comonomers, 15 parts of polyvinyl alcohol, and 0.08 parts Urea, 0.5 parts of ammonium persulfate, 1.3 parts of sodium bisulfite, 10 parts of bentonite and 0.5 parts of methyl acrylate; the comonomer consists of 30 parts of acrylamide and 20 parts of ethyl acrylate.

[0028] The preparation method is the same as in Example 1, and the starches used are 25 parts of cornstarch and 25 parts of tapioca starch.

[0029] The comonomer is composed of acrylamide and acrylate, and the weight ratio of acrylamide to acrylate is 1-4:2-5.

[0030] The inorganic peroxide initiator is one of sodium persulfate, potassium persulfate or ammonium persulfate.

[0031] Described preservative is sodium benzoate.

[0032] The filler is bentonite.

[0033] The acrylate is one ...

Embodiment 3

[0034] Embodiment 3 of the present invention: environmentally friendly starch adhesive for wood, calculated in parts by weight, including 100 parts by weight of oxidized starch emulsion with a mass percentage concentration of 30%, 60 parts of comonomers, 20 parts of polyvinyl alcohol, and 0.25 parts Urea, 0.4 parts of sodium persulfate, 1.2 parts of sodium bisulfite, 15 parts of bentonite and 0.8 parts of methyl acrylate; the comonomer consists of 10 parts of acrylamide and 50 parts of butyl acrylate.

[0035] The preparation method is the same as in Example 1, using 10 parts of wheat starch, 15 parts of potato starch and 25 parts of corn starch.

[0036] The comonomer is composed of acrylamide and acrylate, and the weight ratio of acrylamide to acrylate is 1-4:2-5.

[0037] The inorganic peroxide initiator is one of sodium persulfate, potassium persulfate or ammonium persulfate.

[0038] Described preservative is sodium benzoate.

[0039] The filler is bentonite.

[0040] ...

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PUM

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Abstract

The invention discloses a starch adhesive for environment-friendly timbers and a preparation method thereof. The preparation method comprises the following steps of oxidizing a starch emulsion under the effect of sodium hypochlorite and obtaining oxidized starch through first-step reaction; adding a cross-linking agent into the oxidized starch, enabling the oxidized starch to perform graft copolymerization modification reaction with acrylamide and comonomer of acrylic ester under the effect of the cross-linking agent and obtaining cross-linked oxidized adhesive liquid through second-step reaction; reducing the temperature to be room temperature, then adding a packing and a preservative into the cross-linked oxidized adhesive liquid and finally obtaining the starch adhesive for the environment-friendly timbers. The starch adhesive for the environment-friendly timbers is low in cost and environment-friendly, has the advantages of being good in storage stability and water resisting property, high in bonding strength and the like, can be widely used for timber decoration and bonding of multiple-layer plywoods, shaving boards, artificial boards and other timber adhering products.

Description

technical field [0001] The invention relates to the field of polymer science, in particular to an environment-friendly starch adhesive for wood and a preparation method thereof. Background technique [0002] With the development of social economy and the improvement of people's living standards, the demand for wood materials is also increasing, and the traditional processing methods of wood materials can no longer meet the needs of social and economic development. The most direct and effective way to solve this contradiction is to use the bonding technology to bond, reorganize and compound wood fiber raw materials of different specifications and properties to produce plates, squares and molded products suitable for different use requirements. Wait. These are inseparable from adhesives and bonding technology. For this reason, the position of adhesives and bonding technology in the field of wood processing is even more important. According to data from China Industry Inform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/02C09J129/04C09J11/06C08F251/00C08B31/18
Inventor 吴毅杨再祥石文建雷勇
Owner GUIZHOU LANTU NEW MATERIALS
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