The phenomenon of gelation refers to the thickening or agglomeration of resin or coating at a specified temperature and time.

The main reasons for resin or coating gelatinization are as follows:

1. Beyond the shelf life, UV resin has a shelf life of no more than six months under good storage conditions. But it's best to use it up within three months.

2. UV resin should be stored in plastic drums or metal drums coated with plastic. Metal ions can lower the activation energy of double bonds in UV resins, leading to polymerization reactions and resin gelation. So if the plating layer inside the plastic plating bucket is damaged, the exposed metal layer will cause resin gelation.

3. Low storage temperatures (below 0 ℃) can cause the precipitation of polymerization inhibitors in the paint film, leading to resin self aggregation and resin gelation.

4. During the storage of UV resin, direct sunlight should be strictly avoided. Otherwise, it is easy to cause resin gelation.

5. If the barrels are too full and there is not enough oxygen to inhibit polymerization, it can cause resin to gelatinize.

Precautions for gelatinization:

1. Resin without diluted monomers has a high viscosity, and some users may mistakenly believe that the resin has already gelatinized. In fact, heating it can easily detect whether the resin has gelatinized. Resin without gelatinization will have good fluidity after heating.

2. The issue of using UV resin, the testing methods and indicators for UV coating coatings are the same as other coatings, and may vary depending on the specific application. UV coatings may encounter various problems during application. The gelation during storage is closely related to the UV resin itself, and other problems can be solved by adjusting the UV coating formula. Due to the fact that UV coatings are composed of various components and are also affected by the distance and duration of light exposure, their coating performance is the result of a combination of various factors. The same formula and instant replacement of the same resin can change the performance of the coating due to differences in resin from various manufacturers, requiring adjustments to the formula. However, as long as the resin does not gel or gel in the prepared coating, the performance of the coating can be adjusted through the blending method.

3. There are many reasons for UV coating gelation, not only related to the resin, but also to whether it is caused by improper storage. Due to the addition of photosensitizers, UV coatings require stricter storage conditions than UV resins. They should be able to be stored in a dark place to avoid exposure to light. Additionally, the quality of photosensitizers used is poor, and even if stored in a dark place, they will slowly decompose and cause the cured coating to gelatinize.

4. The quality of monomers is also an important factor affecting storage stability.