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Adhesive for starch-modified polyvinyl alcohol environment-friendly construction and preparation method thereof

A kind of polyvinyl alcohol, starch modification technology

Active Publication Date: 2015-12-02
东莞市山力高分子材料科研有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyvinyl alcohol (PVA) has the advantages of good water solubility, non-toxicity, and low cost, so it is widely used as an adhesive for construction. Adhesive, which greatly limits the scope of application due to its poor water resistance
[0003] At present, chemical modification methods are generally used to improve the water resistance of PVA. Commonly used modification methods include formaldehyde and toluene diisocyanate (TDI). restricted
[0004] In addition, there are certain problems in the modification of PVA with polyvinyl acetate, acrylic emulsion, silica sol, etc., which are currently being tried. For example, the modification process is complicated, the operability is poor, the introduction of raw materials has many varieties, and the cost is high. limit

Method used

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  • Adhesive for starch-modified polyvinyl alcohol environment-friendly construction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The components and parts by weight of the starch-modified polyvinyl alcohol adhesive are: 100 parts of polyvinyl alcohol; 300 parts; 30 parts of corn starch; 3 parts of sodium hydroxide; 8 parts of sodium hypochlorite; 2 parts of borax; 2 parts of sodium sulfite; Potassium persulfate 1 part.

[0018] The preparation method is as follows:

[0019] A. Configuration solution: Add 8 parts of sodium hypochlorite to 18.67 parts of water (dissolved at room temperature), 3 parts of sodium hydroxide to 27 parts of water (dissolved at room temperature), 2 parts of borax to 38 parts of water (dissolved at room temperature), 2 parts of sodium sulfite to 8 parts Water (dissolved at room temperature), 1 part of potassium persulfate plus 19 parts of water (dissolved at 100 ° C), respectively configured to a concentration of 30% sodium hypochlorite solution, 10% Na0H solution, 5% borax solution, 20% sodium sulfite solution, 5% persulfate Potassium sulfate solution is ready for use.

...

Embodiment 2

[0023] The components and parts by weight of the starch-modified polyvinyl alcohol adhesive are: 100 parts of polyvinyl alcohol; 400 parts of water; 35 parts of corn starch; 4 parts of sodium hydroxide; 11 parts of sodium hypochlorite; 4 parts of borax; 2 parts of sodium sulfite ; 1.5 parts of potassium persulfate.

[0024] The preparation method is as follows:

[0025] A. Configuration solution: Add 11 parts of sodium hypochlorite to 25.67 parts of water (dissolved at normal temperature), 4 parts of sodium hydroxide plus 36 parts of water (dissolved at room temperature), 4 parts of borax plus 76 parts of water (dissolved at room temperature), 2 parts of sodium sulfite plus 8 parts Water (dissolved at room temperature), 1.5 parts of potassium persulfate plus 28.5 parts of water (dissolved at 100 ° C), respectively configured to a concentration of 30% sodium hypochlorite solution, 10% Na0H solution, 5% borax solution, 20% sodium sulfite solution, 5% peroxide Potassium sulfate ...

Embodiment 3

[0029] The components and parts by weight of the starch-modified polyvinyl alcohol adhesive are: 100 parts of polyvinyl alcohol; 500 parts of water; 40 parts of corn starch; 6 parts of sodium hydroxide; 15 parts of sodium hypochlorite; 5 parts of borax; 3 parts of sodium sulfite ; Potassium persulfate 2 parts.

[0030] The preparation method is as follows:

[0031] A. Configuration solution: Add 15 parts of sodium hypochlorite to 35 parts of water (dissolved at room temperature), 6 parts of sodium hydroxide to 54 parts of water (dissolved at room temperature), 5 parts of borax to 95 parts of water (dissolved at room temperature), 3 parts of sodium sulfite to 12 parts Water (dissolved at room temperature), 2 parts of potassium persulfate plus 38 parts of water (dissolved at 100°C), respectively configured to a concentration of 30% sodium hypochlorite solution, 10% Na0H solution, 5% borax solution, 20% sodium sulfite solution, 5% persulfate Potassium sulfate solution is ready f...

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Abstract

The invention discloses a starch modified polyvinyl alcohol environment-friendly adhesive for buildings and a preparation method of the adhesive. The adhesive comprises the following components in parts by weight: 100 parts of polyvinyl alcohol, 300-500 parts of water, 30-40 parts of corn starch, 3-6 parts of sodium hydroxide, 8-15 parts of sodium hypochlorite, 2-5 parts of borax, 2-3 parts of sodium sulfite and 1-2 parts of potassium persulfate. The polyvinyl alcohol adhesive is modified with low-price borax and starch simultaneously, the water resistance and bonding strength of the polyvinyl alcohol adhesive are greatly improved, and the adhesive does not contain formaldehyde, does not release irritant gas, does not influence the environmental and body health, belongs to an environment-friendly adhesive and can serve as a waterborne adhesive for buildings or other purposes.

Description

technical field [0001] The invention relates to an adhesive, in particular to an adhesive for construction. Background technique [0002] Polyvinyl alcohol (PVA) has the advantages of good water solubility, non-toxicity, and low cost, so it is widely used as an adhesive for construction. Adhesive, because of its poor water resistance greatly limits the scope of use. [0003] At present, chemical modification methods are generally used to improve the water resistance of PVA. Commonly used modification methods include formaldehyde and toluene diisocyanate (TDI). restricted. [0004] In addition, there are certain problems in the modification of PVA with polyvinyl acetate, acrylic emulsion, silica sol, etc., which are currently being tried. For example, the modification process is complicated, the operability is poor, the introduction of raw materials has many varieties, and the cost is high. limit. Contents of the invention [0005] In order to overcome the deficiencies ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J129/04C09J11/08C09J11/04
Inventor 李彭官燕燕刘晓艳
Owner 东莞市山力高分子材料科研有限公司