News Details
Epoxy resin coating is used at room temperature crosslinking agent
2017-9-3 17:00:25
Epoxy resin coating is used at room temperature crosslinking agent
Through a series of modifications, such as the sealing end, the addition and the salt of the epoxy resin at room temperature crosslinking agent, it was made from the emulsified waterborne epoxy resin at room temperature crosslinking agent. A water-based epoxy resin coating was obtained after mixing with a liquid epoxy resin with low relative molecular mass.
Different end capping agent on the crosslinking agent was studied and the influence of the performance of the emulsion with epoxy resin as coating effect the performance of the coating, and through the observation of the got behind in membrane process, this paper expounds the waterborne epoxy resin crosslinking mechanism of crosslinking agent at room temperature. The emulsion particle size obtained is less than 2 mu m; Coating hardness BBB 017; Adhesion 1; The film has good transparency, water resistance and chemical resistance.
Epoxy resin coatings with high adhesion, excellent chemical resistance, high hardness, good wear resistance, solvent resistance, alkali resistance and salt fog resistance is good wait for a characteristic, has been widely used in industry. Traditional solvent-based epoxy coatings are harmful to the environment and human body.
With the increasing of environmental protection requirements, the waterborne of epoxy coatings is an inevitable trend. Foreign Shell company has developed a lot of water based epoxy system, and has entered the commercial production stage. Domestic research on waterborne epoxy resin system, mainly focused on the modification of epoxy resin by chemical or physical modification, makes for a hydrophilic lipophilicity of epoxy resin or epoxy resin emulsion, so as to achieve the purpose of waterborne epoxy resin.
And this paper is to use the epoxy crosslinking agent at room temperature more ethylene polyamine were modified, with functions of emulsification and moderate reactivity of water-borne epoxy crosslinking agent, able to low relative molecular mass of liquid epoxy resin emulsion and pay the couplet membrane directly.
This article through to room temperature crosslinking agent triethylene tetramine modified, first of all, with a single epoxy compound to stop end of triethylene tetramine, make primary amine hydrogen secondary amine hydrogen, and reduce the activity at the same time improve the compatibility with epoxy resin; With the addition of bisphenol A epoxy resin, the compatibility with epoxy resin was further improved, and the activity of polyamide crosslinking agent was reduced and the application period was prolonged.
Chinese name: Diethyl toluene diamine(DETDA)Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Polyamine crosslinking agent itself is water soluble, hydrophilic drop after addition, using acetic acid salt, appropriate to improve the hydrophilicity and make modification of polyamine crosslinking agent has good water oil balance.
Due to the synthesis of epoxy crosslinking agent chain segment of both hydrophilic amino, and hydrophilic epoxy group, make it has the function of emulsifying agent can directly form the waterborne epoxy emulsion emulsified epoxy resin without the need for additional emulsifier, which was a kind of crosslinking functional and emulsification function of self - emulsified waterborne epoxy crosslinking agent, studied the different end capping agent on the properties of the emulsified waterborne epoxy crosslinking agent and film-forming mechanism.
Without solvent, non-toxic environmental protection, ecological products currently in decorating a project, often to the water environment of kitchen and toilet waterproof processing, some family is decorated after find the smell in the toilet and kitchen is bigger, this kind of situation is mainly due to waterproof coating.
Waterproof coating materials are usually made from coal tar, and the volatile oil has a pungent smell. As a result of the coke gas molecular weight is large, easily in the air does not flow within the indoor environment of deposition, the contamination is not easy to remove, some people under the helpless, had to decorate good toilet all demolition, waterproof processing again.
Another defect of this kind of waterproof coating is to use organic solvent as diluent, organic solvent such as toluene, heavy benzol more toxic substances, low-dose inhaled for long oil and gas and coke benzene can cause respiratory disease and dizziness, nausea, so as to cause cancer, etc. Large doses of inhalation even endanger life.
In order to prevent damage to the environment and water, to ensure the safety of the production and the construction personnel health, pay zone water coating does not use the suspected cancer-causing mo card, do not contain solvents, tar, asphalt, also does not contain formaldehyde, halogenated hydrocarbon, and toxic heavy metals, according to GB / 5193.3 94 evaluation belongs to the non-toxic products.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian