Coating crosslinking agent for low temperature epoxy resin

Coating crosslinking agent for low temperature epoxy resin,The low temperature construction of epoxy coating in winter is slow, especially for the polyamide variety. And our country is vast, many areas winter - the summer temperature is very poor. Especially when season alternation is often a product using normal in a region, and in another region will appear problem, and even had to adjust and change the formula.

For epoxy floor coating, use common polyamide crosslinking agent, the crosslinking slowly under 5 ℃, and seriously affect the construction speed, a lot of inconvenience to the construction.

Is worth pointing out, on the market some less than 5 ℃ in dry environment still has good performance of epoxy floor coating products, more is to use high molecular weight epoxy resin and isocyanate crosslinking agent made of polyurethane epoxy floor paint.

Floor coating, for example, a goods, a group b points can be used alone and drying, a mixed in point b can also use and dry, in fact, the coating product strictly should belong to pu floor coating.

It is parched because of the high molecular weight of epoxy resin, which is dried by the solvent. The dehumidification of the ethyl group is the solvent volatilization, and the other is the exchange of isocyanic acid in response to moisture in the air. Armor points b mixed drying was partly due to solvent evaporation, on the other hand is due to the first division of hydroxyl groups in epoxy resin and the hydrated isocyanate and crosslinking reaction.

The nx-2040 crosslinking agent is a type of epoxy modified amine crosslinking agent. This type of epoxy modified amine crosslinking agent is often encountered in the work of epoxy coating construction construction condition, construction substrate for coating and the influence of the season and the influence of temperature change on the paint two problems.

The characteristics of the modified amine crosslinking agent is under the condition of low temperature can make fast crosslinked epoxy coating system and achieve a high degree of crosslinking, 40% to 50% higher than polyamide crosslinking agent. The final performance of the coating can also be very high.




Chinese name: Diethyl toluene diamine(DETDA)

Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.

Density 1.022

Viscosity (20 ℃) ??mPa·ss290±10

Pour Point ℃-9

Boiling point of310°C

Flash Point°C161.1°C


In practical applications, the use of modified amine crosslinking agent in 50 ℃ and 0 ℃ can make normal crosslinked coating system, table dry in a few hours and into the next process. However, the polyamide crosslinking agent will not be able to meet the next construction requirement under the same temperature for more than 10 hours or even in 1-2 days.

Epoxy resin consists of a rigid epoxy resin with a benzene ring and a malleable epoxy resin containing the polyether chain. Described the crosslinking agent for single hydroxyalkyl replacing m-phenylene diamine, quality content is 15-30% of epoxy resin, epoxy resin in the toughness of epoxy resin and rigid polyether epoxy resin quality for 4:5 ~ 2:1.

Rigidity is epoxy resin containing benzene ring glycidyl ether epoxy resin, flexible epoxy resin is polyether glycidyl ether epoxy resin, epoxy resin to provide rigidity strength, flexible epoxy resin toughness; Crosslinking agent for single hydroxyalkyl replacing m-phenylene diamine, epoxy resin adhesive has excellent toughness at low temperature, can be used at 100 ℃ to liquid helium temperature.

With low viscosity, can be used as sealant, especially suitable for tiny slot sealing. It can be used to transfer molding matrix resin, make composite materials, have high strength and good low temperature performance.

Present well at low temperatures, chemical sand control agent for oilfield casing deformation Wells sand control effect is not ideal, on the basis of resin sand control mechanism, for consolidation of core compressive strength index, through the resin, the dosage of crosslinking agent, the dosage of coupling agent experiment under a low temperature is developed with high bonding strength of epoxy resin sand control agent, crosslinking time, temperature and investigates and chemical media's influence on the compressive strength of consolidated core.

The experimental results show that the epoxy resin sand control system, the optimal formula is as follows (based on quartz sand quality) : 4% + resin crosslinking agent 0.4% + 0.2% coupling agent. According to the formula in the crosslinking reactions in 60 ℃ water bath for 24 h for consolidation of core of high compressive strength (8.5 ~ 16.8 MPa), good permeability (14.1 mu m2 or), to oil, water, salt, acid, weak alkali medium has good tolerance and good temperature resistance. The reaction of the NH in crosslinking agent - NH - and epoxy in epoxy resin is the main mechanism of the crosslinking reaction.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

Diethyl toluene diamine(DETDA)  http://www.yaruichem.com