High activity acrylate monomer paint crosslinking agent

High activity acrylate monomer paint crosslinking agent

Using hydroxyl ethyl acrylate (HEA) and maleic anhydride (MA) ring opening reaction of half ester AEOEA esters by half AEOEA and glycidyl ester of acrylic (GMA) ring opening reaction of a kind of three functional groups straight-chain AEHMPM highly reactive monomers.

The effects of initiator type, initiator concentration and different light intensity on AEHMPM light polymerization were detected by real-time infrared (rt-ir). The energy storage modulus E 'and glass transition temperature (Tg) were detected by the dynamic mechanical analyzer (DMA).

The results showed that the polymerization rate, double bond conversion rate and the crosslinking density of AEHMPM were better than the commercialized trimethyl-propane triacrylate (TMPTA).

In order to guarantee the oligomer in more than two functional groups, in addition to increase the amount of functional groups, obviously requires narrow molecular weight distribution as far as possible, but not a narrow molecular weight distribution of oligomer make each molecule has the sufficient condition of functional groups of 2 or more, because the general functional groups through copolymerization method is introduced into the polymer.

Due to the competitive rate is different, a monomer in the polymer distribution difference is very big, unless there is a like a radical polymerization copolymerization of zhongheng points (r1 = 1, r2 = 2), but this is very rare, so the evenness of functional group how to distribution of polymerization technology for the preparation of high solid coatings is very important.

Paint in the spraying process or paint film drying, the surface of the white fog. Causes:

The air humidity in the construction environment is too high;

The thinner evaporates too fast;

Low surface temperature;

The compressed air oil water separator fails and the water enters the paint. Solution:

The relative humidity of the construction environment should not exceed 70%;

Using a higher boiling thinner;




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


The substrate temperature should be the same as the paint temperature or slightly higher;

Compressed air must be treated by oil and water separator to ensure no water and oil.

In the process of construction or use, the paint cracks or separates from the bottom coating.

Causes:

The heat and shrinkage of the substrate;

Resin has a large shrinkage in low temperature;

The temperature difference between the substrate and the coating is too large, the upper coating is crosslinked first;

The underlying crosslinking is excessive and the wax is fully surfaced;

The crosslinking agent is too small, the crosslinking is not complete.

Solution:

The shrinkage ratio of the substrate should be smaller than the coating.

A resin that selects small shrinkage;

The temperature of the substrate and coating should be the same or slightly higher;

When the undercoating is slightly sticky, it must be coated with a coating;

The amount of crosslinking agent should not be lower than the recommended amount.

This paper is a summary of relevant problems and practical solutions in the work practice, with a view to helping people engaged in unsaturated polyester coating and coating management and operation.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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