Fluorosilicone coating crosslinking agent

Fluorosilicone coating crosslinking agent

Coating performance detection. The coating is applied on the board of the maleplate, the performance test data of the coating after 7 d.
Join) (hereinafter referred to as the silicon monomer vinyl siloxane monomers were increased resistance to impact and hardness data, after the original resistance to impact of single-component fluorine resin coating could not through 20 cm, and the impact after joining silicon monomer by up to 40 cm, can easily prove the effect of crosslinking.

Fluorine and silicon and fluorine silicone resin - 1-2 of the coating hardness and the original one-component pencil hardness is same, fluorine resin coating is HB, seems to be unreasonable, but fluorine silicone - 2 join a small amount of water, and the hardness is improved, the reason is that the crosslinking silicone monomer in the polymer.

The crosslinking mechanism of the silicon monomer in the polymer. S I (OE t) 3 is generated by water - Si (OH) 3, and it is easy to lose water to form S i-o, making linear macromolecules into a network.

The addition of silicon monomer, the resistance of impact and hardness is improved, and the characteristics of silicone resin are shown. The increase of hardness indicates that the coating has some degree of cross-linking. Add a certain amount of silicon monomer, the performance of the resin film is improved, all improved transparency and gloss, shows that the addition of silicon monomer, reduce the crystallinity of the resin.

However, when the silicon monomer is added, the luster decreases, which is due to the addition of too much silicon monomer to the uniformity of the resin. The hardness of the coating was improved after the fluorine resin-2 plus water, and the mechanism of the hydroxyloxane and water was validated by the process.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Raw material ：

TDA industrial, Sichuan production

Ethylene (Et) polymer grade, Shanghai production

TEA industrial imports

A reagent grade additives


Introducing single-component fluorine resin polymerization system vinyl siloxane monomer, the polymer can be cross-linked at normal temperature, the preliminary test results show that the coating of some performance (such as impact resistance and transparency, hardness and water resistance and solvent resistance, etc.) have some improve. The work will continue to be studied further.

The uncrosslinked gel appears at 3100 cm-1, and the absorption peak of the membrane is very weak.

This is due to the cross-linking reaction of the amide group in diacetone acrylamide. And crosslinked film after 1650 cm - 1 does not appear before the crosslinking of absorption peak, this is because of the crosslinking reaction generated C = N structure, it shows that polymer of ketone carbonyl with hydrazine in the dehydration reaction of hydrazone, confirmed the DAAM and ADH crosslinking reaction. The amount of compound emulsifier is 2 per cent, m (co-630) : m (co-436) : m (SDS) = 1:0.8:0.2, DAAM dosage is 2 per cent.

Shell monomer to join after the average particle size of latex particles by nuclear 75 nm layer increases to the final 155 nm, and ultimately the latex particle size distribution (PDI = 0.015) than nuclear layer of colloidal particle size distribution (PDI = 0.066) is small, this is because as the shell to join in the process of the emulsion, pearl shell monomer droplets continue to enter inside nuclear emulsion grains with no reaction of the colloidal particles in all the double bond of addition reaction, shell monomer on the surface of latex particle nuclear layer continue reaction, nuclear layer latex particles increase, eventually generates more uniform particle size of latex particles.

Polymer appeared two clear glass transition temperature, 23.4 ℃ and 52 ℃ respectively, the Tg with nuclear layer of polymer particles design theory for 48 ℃, shell polymer Tg theory for 21 ℃. It is shown that the polymer of acrylate polymer with hard core soft shell is obtained through the formation of seed emulsion polymerization. It also shows that the reason for the increase in the size of the emulsion is due to the fact that the monomer in the shell is polymerized on the nuclear layer. The influence of different processes on the structure of latex grain was investigated by using conventional emulsion polymerization process.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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