Description

Photoinitiator 6993

Synonym:UV Cationic Photoinitiator 6993;UVI-6993;UVI-6976 powder; Mixed type triarylsulfonium hexafluoroantimonate salts

CAS NO:71449-78-0

Standard：

UV Absorption Spectrum :

Applications:

1. Photoinitiator 6993: This photoinitiator excels at curing alicyclic epoxy resins such as Sinepoxy CER-421 and Sinepoxy CER-4299. It is perfectly matched to these alicyclic epoxy resins and enables efficient curing processes. In addition, it also has excellent curing effects on vinyl ethers and other cationic curing materials. From a historical perspective, the emergence and application of photoinitiators was a major innovation in material curing technology. In the past, the curing process of many materials was cumbersome and time-consuming, but the advent of photoinitiators greatly shortened this process, improved production efficiency, and promoted the rapid development of related industries.

2. A deeper analysis shows that in the application scenario of transparent coatings, the content of photoinitiator 6993 in the starting formulation is extremely critical. Its content is specified in the range of 1.5-3.0% (by weight). This figure was not set arbitrarily, but was determined through extensive experimentation and practical application. For example, in the early stages of product development, the content of photoinitiator 6993 was increased to 5%, but this was found to have caused an imbalance in some of the coating’s properties, such as an increase in hardness and a significant decrease in toughness, making the coating more prone to cracking when impacted by external forces. Conversely, if the content is too low, for example below 1%, the curing effect is not good, and the desired coating strength and stability requirements cannot be met. Therefore, the content range of 1.5-3.0% is the optimal range obtained after comprehensive consideration of the various performance indicators of the coating, which can ensure that the transparent coating has a good curing effect while maintaining balanced physical properties.

3. Let’s explore a new hypothetical scenario. Suppose that in the future, a special project requires the use of materials with a transparent coating and photoinitiator 6993 curing in an extremely harsh environment, such as deep-sea high pressure, strong corrosion, or high radiation and temperature changes in space. Then, would the existing 1.5 – 3.0% photoinitiator 6993 content range still meet the requirements? This requires further research and adjustment. Perhaps in the deep-sea environment, due to the high pressure and high corrosiveness of the seawater, the content of photoinitiator 6993 needs to be appropriately increased to enhance the curing strength and corrosion resistance of the coating, but at the same time, other performance issues that may be caused by too high a content, such as the previously mentioned decrease in toughness, need to be considered. In the space environment, in the face of high radiation and drastic temperature changes, it may be necessary to develop a new formulation system that can ensure the effective curing of photoinitiator 6993 while adding some special radiation-resistant and temperature-regulating materials that work synergistically with the existing ingredients to meet the requirements for use in the space environment.

Packaging and Shipping:

Packing:25kgs to 200kgs/drum.

Delivery:with in 5-7 working days.

Storage:

Stored in a cool dry place out of direct sunlight.

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