Industry dynamic

What are the factors of abnormal curing of silicone potting adhesive?

2021-02-24
Silicone potting adhesive can effectively protect electronic equipment products, waterproof, moisture-proof, dust-proof, insulation, thermal conductivity, corrosion prevention, and other functions. Silicone potting adhesive curing in two ways: room temperature curing and heating curing. If the phenomenon of silicone potting adhesive is not cured, what factors will cause it?
1. Proportioning problem
Human factors or measurement tool error caused by the wrong proportion of glue, the more A component and B component glue proportion is about the larger the need to pay attention to the accuracy of the weighing and the accuracy of the electronic scale, such as A: B = 10:1 products, B component control weight should be more accurate.
2, The curing temperature
Curing temperature drop is also a factor that causes the curing speed of silicone potting adhesive slowdown, more affected is the impact on the time of receipt or into the next process, especially for users without heating conditions need to do a good job of avoiding the winter cooling causes curing slow down, pay attention to good receipt time or control the time to do the next process.
3, Poisoning

Some factors make the catalyst poisoning when using the environment, such as organic compounds containing phosphorus, sulfur, nitrogen, or the use of polyurethane, epoxy resin, unsaturated polyester, condensation type room temperature vulcanization silicone rubber, and other products at the same time with the addition of silicone, will lead to a decrease in the catalyst catalytic activity, in serious cases, direct failure, can not be cured is still a liquid state, so choose to use silicone potting adhesive products first of all their products can not Contain the above material components.