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Weather-resistant water-based adhesive and preparation method thereof

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 bonding strength, low free formaldehyde content, heat It can improve the bonding strength and water resistance, improve the water resistance and environmental protection performance, and increase the density.

Active Publication Date: 2014-05-07
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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  • Weather-resistant water-based adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Weigh each component according to the following weight ratio:

[0040] Deionized water 40%

[0041] Sodium acetate 0.01%

[0042] Disodium hydrogen phosphate dodecahydrate 0.05%

[0043] Protective colloid polyvinyl alcohol RS-2117 5%

[0044] Tartaric acid 0.3%

[0045] Cross-linking agent FeSO 4 0.003%

[0046] Vinyl acetate 52.972%

[0047] Cross-linking monomer styrene 0.005%

[0048] Hydrogen peroxide 0.1%

[0049] Antifungal agent Bactericidal preservative Huake-983 0.05%

[0050] Defoamer water-based defoamer Defom W-052 0.01%

[0051] Coalescent 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate 1.5%;

[0052] (2) The weighed cross-linking agent FeSO 4Prepare the cross-linking agent FeSO with a mass concentration of 1% with deionized water 4 solution, ready to use;

[0053] (3) Add and prepare FeSO in the reactor 4 For the remaining deionized water after the solution, start stirring and add all sodium acetate, disodi...

Embodiment 2

[0058] (1) Weigh each component according to the following weight ratio:

[0059] Deionized water 52.638%

[0060] Sodium acetate 0.02%

[0061] Disodium hydrogen phosphate dodecahydrate 0.15%

[0062] Protective colloid polyvinyl alcohol RS-2117 3%

[0063] Tartaric acid 0.3%

[0064] Cross-linking agent FeSO 4 0.005%

[0065] Vinyl acetate 40%

[0066] Cross-linking monomer styrene 0.007%

[0067] Hydrogen peroxide 0.2%

[0068] Antifungal agent Bactericidal preservative Promex CHS4 0.15%

[0069] Defoamer water-based defoamer DEFOMEX 2063 0.03%

[0070] Coalescing agent diethylene glycol dibenzoate 3.5%;

[0071] (2) The weighed cross-linking agent FeSO 4 Prepare the cross-linking agent FeSO with a mass concentration of 1% with deionized water 4 solution, ready to use;

[0072] (3) Add and prepare FeSO in the reactor 4 For the remaining deionized water after the solution, turn on the machine and stir to add all the sodium acetate...

Embodiment 3

[0077] (1) Weigh each component according to the following weight ratio:

[0078] Deionized water 55%

[0079] Sodium acetate 0.01%

[0080] Disodium hydrogen phosphate dodecahydrate 0.05%

[0081] Protective colloid polyvinyl alcohol RS-2117 3%

[0082] Tartaric acid 0.15%

[0083] Cross-linking agent FeSO 4 0.003%

[0084] Vinyl acetate 40.122%

[0085] Cross-linking monomer styrene 0.005%

[0086] Hydrogen peroxide 0.1%

[0087] Antifungal agent Bactericidal preservative Promex CHS4 0.05%

[0088] Defoamer water-based defoamer DEFOMEX 2063 0.01%

[0089] Coalescing agent diethylene glycol dibenzoate 1.5%;

[0090] (2) The weighed cross-linking agent FeSO 4 Prepare the cross-linking agent FeSO with a mass concentration of 1% with deionized water 4 solution, ready to use;

[0091] (3) Add and prepare FeSO in the reactor 4 For the remaining deionized water after the solution, turn on the machine and stir to add all the sodium acetat...

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Abstract

The invention discloses a weather-resistant water-based adhesive and a preparation method thereof. The weather-resistant water-based adhesive is prepared from deionized water, sodium acetate, disodium hydrogen phosphate dodecahydrate, a protective colloid, tartaric acid, a crosslinking agent, vinyl acetate, crosslinking monomer, oxydol, a mold preventive, a defoaming agent and a film-forming assistant. The preparation method comprises the following steps: adding the sodium acetate, disodium hydrogen phosphate dodecahydrate, protective colloid and defoaming agent into the deionized water to obtain a protective colloid solution; adding part of the vinyl acetate and crosslinking monomer into the protective colloid solution, adding all the crosslinking agent solution, and adding part of the oxydol and tartaric acid to obtain a seed emulsion; and dropwisely adding part of the 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 the film-forming assistant, and adding the 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 weather-resistant water-based adhesive and a preparation method thereof. Background technique [0002] Polyvinyl acetate synthetic emulsion has been widely used in wood processing, furniture manufacturing, architectural decoration, and paper processing since the 20th century due to its advantages such as high bonding strength, fast curing speed, convenient use, low price, non-toxic and non-polluting. , 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 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 add toxic cross-linking ...

Claims

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Application Information

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