Features of general-purpose wetting agent for water-based coatings PM-WET 100

PM-WET 100 is a 100% active non-ionic surfactant with good wetting and slurry flow properties for aqueous coating systems.

1, It can improve the color mixing of latex coatings, especially for pre-dispersion color paste.
2, Same performance as alkyl phenol polyoxyethylene ether (such as Hyonic PE-100).

Coordinating agent Coordinating agent is an important part of AT RP polymerization initiation system, which has the function of stabilizing transition metal and increasing the solubility of catalyst. The earliest used complexing agent is bipyridine, and the initiation system composed of it, alkyl halide and copper halide is a heterogeneous system. The amount is large, the initiation efficiency is not high, and the molecular weight distribution of the product is also wide. Using oil-soluble long-chain alkyl-substituted bipyridine or 2-pyridine aldimine as a complexing agent instead of bipyridine, the homogeneous reaction of AT RP polymerization has been achieved.

The AT RP polymerization of monomers such as methyl methacrylate and methyl methacrylate greatly improves the catalytic activity and selectivity of the copper halide catalyst. Substituted bipyridines in homogeneous systems are expensive, and the polymerization rate is much slower than that of heterogeneous systems. This problem can be solved by using cheap polyamines (such as N, N, N’, N”, N^ pentamethyldiethylene Triamine), imines (such as 2-pyridinecarboxaldehyde n-propylamine), amino ether compounds [such as bis(dimethylaminoethyl) ether], etc. instead of expensive bipyridine to solve the problem, these alternatives low viscosity wax emulsion The addition effect is equivalent to that of substituted bipyridine.

The advantage of the AT RP initiation system is that it can be used for the polymerization of a variety of monomers, with a wide range of applications, short reaction time, polymer molecular weight between 10,000 and 100,000, and the resulting molecular weight distribution is very narrow, generally 1.15 Between ~1.5, the lowest can reach 1.03. Therefore, the AT RP initiator system is a very promising initiator for living radical polymerization.