1. Onium salts cationic photoinitiators were new highly efficient photoinitiators in UV curing applications. They played important roles in UV-curing industry.

2. Nanometer tungsten nitride powders were synthesized as amm onium metatungstate by means of spray drying, calcination, milling and nitration in pure ammonia.

3. This paper discussed study on the development physical and chemical properties, crop safety, and application prospect of fosamine amm onium in China.

4. Ion pairs with different structure of either dye anion or onium cation have different properties.

5. The room temperature modulus and high temperature modulus of cured samples with low content of onium salt initiator have little change before and after the addition of co-initiator.

6. UV-curable acrylated epoxy prepolymer resin used for bamboo and wood was modified by reacting E-44 epoxy with acrylic in the presence of onium.

7. Epoxides, episulphides and ethylene imines also polymerize via similar cyclic onium ion mechanisms.