Water transfer coating crosslinking agent

Water transfer coating crosslinking agent, waterborne coating experiment of raw materials

Polyester glycol, polycarbonate glycol, polyethylene tetrahydrofuran ether glycol, high temperature resistant polyester glycol, toluene diisocyanate (TDI), different fluorine ketone diisocyanate (IPDI), HDI, H12MDI, DMPA, 1, 4 butanediol, diethylene glycol, TMP, acetone, T9, triethylamine, ethylenediamine, fluorine ketone diamine, inorganic silicon modified resin, flow ping agent, defoaming agent, wetting agent, etc.

Analysis of experimental instruments and equipment, reagents

Three flask, condenser pipe, thermometer, power electric mixer, distillation, distillation head, circulating water vacuum pump, a beaker, etc. Thermostatic drum wind drying oven, analytical balance, 50% ethanol solution, etc

In a blender, condenser pipe, the three of the thermometer in the flask to join quantitative polyester glycol, polycarbonate glycol, polyethylene tetrahydrofuran ether glycol, high temperature resistant polyester glycol, and a mixture of arbitrary two 1 hour, 120 ℃, dehydration, cooling into quantitative isocyanate and TMP, 90 ℃ heat for 2 hours.

Cool to join DMPA, each small molecule alcohol, a small amount of acetone, 80 ℃ heat preservation for 1 hour. Cool to join the T9, acetone, NMP, 60 ℃ heat for 2 hours, measuring the - NCO content reach the specified value, cooling, and amine neutralization, water strong stirring, and then use different fluoride, ketone diamine or ethylene diamine extender chain, add inorganic silicon modified resin (homemade), heat removal solvent, silicone modified waterborne polyurethane resin.

The determination of - NCO content. This experiment test with n-butyl amine method -- the content of NCO measurement steps are: accurate weighing about 3 grams of sample in a clean in the conical flask, add 20 ml anhydrous toluene, to dissolve the sample, use pipette to join 10 ml 2 n-butyl amine - toluene solution, shaking the bottle inside the liquid mixing, room temperature placed 20-30 min, add 40-50 ml isopropyl alcohol or ethanol, add a few drops of bromocresol green as indicator, with 0.5 mol/L HCl standard solution titration, change from blue to yellow when the solution to the finish line, and the blank test.

Its computation formula is: W - NCO = 42/1000 (where V0 - V1) * C * m x 100%

Type: where V0, V1 - blank titration and the volume of the sample consumption of hydrochloric acid standard solution titration, ml

C -- -- -- -- -- -- -- -- -- -- the concentration of a solution of hydrochloric acid, mol/L

M -- -- -- -- -- -- -- -- -- -- sample weight, g

42 -- -- -- -- -- -- -- -- -- the molar mass of NCO group, g/mol (note)

The emulsion into the teflon plate made of box (6 cm * 6 cm * 1 cm) placed within 60 ℃ electric drum wind drying oven, take out after 12 hours, 1 hour at room temperature to cool naturally.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine packing： 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).


High temperature resistance test

(1) take the above preparation of coating (2 cm * 2 cm) 2 block, overlapping shape into the oven, pressure above 1 kg weight, 120 ℃ for 30 min, take place with natural cooling at room temperature, observe whether the adhesion.

(2) the preparation of products with silver cardboard, cutting into 10 cm by 10 cm square, stack back down on 5 kg weight on keep within 70 ℃ oven for 12 hours, take out, see if stick together, or the coating will be lost.

(3) the resin coated by vacuum aluminum plating paper, dry, cut into 8 cm x 20 cm size, jinan lincom heat sealing device testing.

Peel test: will paint coated onto PET film, drying, with 3 m tape pull, test strip.

The types of glycol impact on the performance of the product. Actual test using different polyester glycol (ether) and on the ratio of the number of adjustment, found in polycarbonate by alcohol and high temperature resistant polyester glycol 6-4 ratio of reaction resin was prepared by temperature tolerance and stripping the closest requirements, other single dibasic alcohol to make product temperature resistance and easy peeling performance cannot achieve unity, some difficult stripping, some temperature resistance is poor.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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