Usage and dosage of DH-4073 leveling wetting agent

2021-10-01   Pageview:96

Adding amount: 0.5~1% of the total formula, added during the production process or added at the stage of paint mixing.

This product is suitable for solvent-based coatings and inks, water-based coatings and inks, UV systems.

 

 

 

 

 

 

 

 

 

 

 

I nifer ter initiator can be used for styrene (St) and methyl methacrylate (MMA), as well as methyl acrylate (MA), vinyl acetate (VAc), acrylonitrile (AN), methacrylonitrile (MAN) Controllable polymerization, and also successfully used in the molecular design of polymers, using monofunctional, double-functional and multifunctional Inifer ter initiators to synthesize AB-type, ABA-type block copolymers and star polymers .

Alkoxyamines are a type of initiation system developed in recent years. They are produced by the reaction of common initiators and stable oxygen and nitrogen radicals (TEMPO), so oxidised polyethylene wax they can also be called TEM-PO initiation systems. The reaction of azobisisobutyronitrile (A IBN) and TEMPO.

Irreversible termination. “Dead” polymer
TEMPO is the abbreviation of 2, 2, 6, 6-tetramethylpiperidine oxide. It is a free radical scavenger commonly used in organic chemistry. It can neither initiate polymerization nor irreversibly terminate with chain free radicals. This kind of stable free radicals only couples with chain-growth free radicals to form covalent bonds. This covalent bond can decompose to generate free radicals at high temperatures. Therefore, after TEMPO captures chain-growth free radicals, it is not the true death of the active chain. It only temporarily inactivates and interrupts the chain growth reaction. The TEMPO initiation system can be used to obtain polymers with a very narrow molecular weight distribution. The molecular weight distribution index is about 1.2, and the weight-average relative molecular weight of the polymer can reach several thousand to several tens of thousands.
3. Atom transfer radical polymerization initiation system.

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