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Preparation method of weather-resistant water-based adhesive

An adhesive and weather resistance technology, applied in the direction of monocarboxylate copolymer adhesives, adhesive types, polymer adhesive additives, etc., can solve the problem of low free formaldehyde content, low bonding strength, heat It can improve the water resistance and environmental protection performance, improve the bonding strength and water resistance, and improve the bonding strength.

Active Publication Date: 2015-07-08
JIANGSU HEISONGLIN ADHESIVE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current polyvinyl acetate synthetic emulsion has poor water resistance, heat resistance, and weather resistance. It is prone to whitening and cracking when soaked in water and moisture, and the heat intensity decreases. Especially in outdoor decoration and bonding of kitchens, toilets, and bathrooms, there are many customer complaints.
For this reason, various manufacturers have added toxic crosslinking agent isocyanate to polyvinyl acetate synthetic emulsion to improve the water resistance of the emulsion. Little do they know that isocyanate is harmful to the human body and can cause cancer.
Moreover, if this method is used, it must be used and prepared immediately, and the prepared glue must be used up within 1 hour, otherwise it will be cured and scrapped, which will pollute the environment and waste resources.
Therefore, the existing polyvinyl acetate synthetic emulsion cannot adapt to the needs of industrialized large-scale production, seriously restricting its own development
At present, many manufacturers use other formulas to prepare adhesives. For example, the patent of Chinese Patent No. 201210038155.5 discloses a kind of adhesive, which is made of formaldehyde solution, urea, polyvinyl alcohol, melamine and sodium hydroxide. Although the process is simple and easy Industrialized production is realized, and the free formaldehyde content is also low, but there is still a small amount of formaldehyde volatile matter, which cannot meet the current environmental protection requirements; Chinese patent No. 200810058298.6 discloses an environmentally friendly adhesive, which is composed of compound emulsifier Tween T-80 and water, composed of taxi mother liquor, acrylic acid, water, thickener, surfactant, tackifier, modifier, initiator, plasticizer, preservative, no pollution, no detoxification, but low bonding strength , the curing speed is slow, and the application is subject to certain restrictions

Method used

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  • Preparation method of weather-resistant water-based adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh each component according to the following weight ratio:

[0039] Deionized water 40%

[0040] Sodium acetate 0.01%

[0041] Disodium hydrogen phosphate dodecahydrate 0.05%

[0042] Protective colloidal polyvinyl alcohol RS-2117 5%

[0043] Tartaric acid 0.3%

[0044] Crosslinking agent FeSO 4 0.003%

[0045] Vinyl acetate 52.972%

[0046] Crosslinking monomer styrene 0.005%

[0047] Hydrogen peroxide 0.1%

[0048] Antifungal agent, bactericidal preservative, Huake -983 0.05%

[0049] Water-based defoamer Defom W-052 0.01%

[0050] Film-forming aid 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate 1.5%;

[0051] (2) The weighed crosslinking agent FeSO 4 Mixed with deionized water to form a crosslinking agent FeSO with a mass concentration of 1% 4 Solution, ready to use;

[0052] (3) Add and prepare FeSO in the reactor 4 The remaining deionized water after the solution is turned on and stirred to add all the sodium acetate, disodium hydrogen phosphate ...

Embodiment 2

[0057] (1) Weigh each component according to the following weight ratio:

[0058] Deionized water 52.638%

[0059] Sodium acetate 0.02%

[0060] Disodium hydrogen phosphate dodecahydrate 0.15%

[0061] Protective colloidal polyvinyl alcohol RS-2117 3%

[0062] Tartaric acid 0.3%

[0063] Crosslinking agent FeSO 4 0.005%

[0064] Vinyl acetate 40%

[0065] Crosslinking monomer styrene 0.007%

[0066] Hydrogen peroxide 0.2%

[0067] Antifungal agent, bactericidal preservative Promex CHS4 0.15%

[0068] Water-based defoamer DEFOMEX 2063 0.03%

[0069] Diethylene glycol dibenzoate 3.5%;

[0070] (2) The weighed crosslinking agent FeSO 4 Mixed with deionized water to form a crosslinking agent FeSO with a mass concentration of 1% 4 Solution, ready to use;

[0071] (3) Add and prepare FeSO in the reactor 4 The remaining deionized water after the solution is turned on and stirred to add all the sodium acetate, disodium hydrogen phosphate dodecahydrate, protective colloidal...

Embodiment 3

[0076] (1) Weigh each component according to the following weight ratio:

[0077] Deionized water 55%

[0078] Sodium acetate 0.01%

[0079] Disodium hydrogen phosphate dodecahydrate 0.05%

[0080] Protective colloidal polyvinyl alcohol RS-2117 3%

[0081] Tartaric acid 0.15%

[0082] Crosslinking agent FeSO 4 0.003%

[0083] Vinyl acetate 40.122%

[0084] Crosslinking monomer styrene 0.005%

[0085] Hydrogen peroxide 0.1%

[0086] Antifungal agent, germicide and preservative Promex CHS4 0.05%

[0087] Water-based defoamer DEFOMEX 2063 0.01%

[0088] Diethylene glycol dibenzoate 1.5%;

[0089] (2) The weighed crosslinking agent FeSO 4 Mixed with deionized water to form a crosslinking agent FeSO with a mass concentration of 1% 4 Solution, ready to use;

[0090] (3) Add and prepare FeSO in the reactor 4 The remaining deionized water after the solution is turned on and stirred to add all the sodium acetate, disodium hydrogen phosphate dodecahydrate, protective colloid...

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Abstract

The invention discloses a preparation method of a weather-resistant water-based adhesive, which mainly comprises the following steps: weighing components in percentage by weight, and adding sodium acetate, disodium hydrogen phosphate dodecahydrate, a protective colloid and a defoaming agent into deionized water to obtain a protective colloid solution; adding part of vinyl acetate and crosslinking monomer into the protective colloid solution, adding all crosslinking agent solution, and adding part of oxydol and tartaric acid to obtain a seed emulsion; and dropwisely adding part of vinyl acetate and oxydol into the seed emulsion, adding the rest of tartaric acid, dropwisely adding the rest of vinyl acetate and oxydol, carrying out curing reaction, adding a film-forming assistant, and adding a mold preventive to obtain the weather-resistant water-based adhesive. The weather-resistant water-based adhesive has the advantages of high bonding strength, excellent heat resistance and excellent water resistance, is convenient to use, enhances the work efficiency and lowers the cost.

Description

Technical field [0001] The invention relates to an adhesive, in particular to a method for preparing a weather-resistant water-based adhesive. Background technique [0002] Polyvinyl acetate synthetic emulsion has the advantages of high bonding strength, fast curing speed, convenient use, low price, non-toxic and non-polluting, and has been widely used in wood processing, furniture manufacturing, construction decoration, and paper processing since the 20th century. , Book binding, fabric processing, handicraft manufacturing and many other industries. However, the current polyvinyl acetate synthetic emulsion has poor water resistance, heat resistance, and weather resistance. It is easy to whiten and crack when immersed in water, damp, and its heating strength is reduced. Especially in outdoor decoration and the bonding of kitchens, toilets, and bathrooms, there are many customer complaints. . For this reason, various manufacturers have added toxic cross-linking agent isocyanate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J131/04C09J11/04C09J11/06C09J11/08C08F218/08C08F212/08C08F4/40C08F2/22
Inventor 刘鹏凯王向阳
Owner JIANGSU HEISONGLIN ADHESIVE FACTORY