Epoxy coating underwater crosslinking agent

Epoxy coating underwater crosslinking agent,Must not soluble in water and by water emulsion, should have certain polarity and viscosity, can in the water wet surface of steel, and quickly crosslinked epoxy resin.

On this basis, we adopt different crosslinking agent, through a large number of experiments, finally selected a modified amine crosslinking agent for underwater epoxy crosslinking agent.

The choice of fillers. Coating can be used underwater construction corrosion and rust paint,

Such as chromate and phosphate, and rust and inert pigment, such as iron oxide red, micaceous iron oxide, iron oxide black, etc. Packing with inert material is given priority to, in older than important, such as heavy stone powder, talcum powder, mica powder, etc. The use of these fillers, not only can reduce cost, also can adjust coating pigment volume concentration (PVC), dry shrinkage, reduce film adhesion.

The choice of additives. Underwater crosslinked coating to good wetting steel surface in water, requires far below the water surface tension coating system, so the test add wetting agent, surface tension is the system is reduced, can be better for the steel surface wetting and penetration cracks. In underwater crosslinked coating selection of wetting agent on the coated surfaces to residual is not out of the water suction coating to enhance internal coating adhesion to substrate.

Coating crosslinked, the water is gradually from inside the coating to coating outside. Due to the coating thicker, crosslinking time is short, paint flow flat need excellent results of flow ping agent, a short time to complete the coating on the surface of the flow. In addition, the antifoaming agent is underwater and indispensable to the crosslinked coating additives.

Epoxy resin and modified amine crosslinking mechanism and crosslinking agent on the water in the air, as are the amino of crosslinking agent and ring opening reaction of epoxy: primary amine react with epoxy group to generate secondary amine, secondary amine reacts with epoxy group production of tertiary amine and tertiary amine epoxy groups and further reaction to produce high polymer.

Application: apply to the pier, offshore oil platforms, pipelines, steel pile of ship collision and river water conservancy equipment underwater corrosion maintenance can be applied, with significant social benefits and economic benefits.




Chinese name: Diethyl toluene diamine(DETDA)

Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine

English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;

CAS No. :68479-98-1

EINECS No. :270 -877-4

Molecular formula: C11H18N2

Molecular Weight: 178.28

Boiling point: 310 ℃

Refractive index: 1.581

Flash Point: > 140 ℃

Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022

Risk Codes: R10; R35

RIDADR: UN 3082

Safety instructions: S2; S26; S39; S61

Packing Group: III

Hazard Class: 6.1


Basic requirements and processing:

1. Surface treatment: metal surface using manual labor manual machine (such as: the shovel and iron brush or electric tools, etc.) out floating rust or sea creatures, if conditions permit may also use water cannons.

2. The concrete surface clean without mud, seaweed, oysters, and so on.

3. The processed must immediately set about coating, otherwise there will be a sea of biofouling rust and return.

Coating: coating or brush

Theory of usage: each dosage 0.6 1 kg / ㎡.

Method:

Part A and part B two after mixing proportion by the regulation, can be blown or brush. Blade coating or brush, using a rubber spatula or hard brush, the extrusion of the surface water out, make the paint adhesion on the surface of steel. Forcibly plastering 3-4 times back and forth, will be subject to shave with uniform. The coating is general plastering 3-4 times back and forth, will be subject to wipe scraping the uniform.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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