There are three main phenomena of "yellowing" in the color of alcohol based porcelain white silicone adhesive:
1. The main reason for the yellowing of the entire bottle/barrel of porcelain white glue during storage is due to quality issues with titanium complexes.
2. During storage, the bottom of the rubber bottle or the surface of the large barrel may turn yellow, mainly due to the poor sealing of silicone adhesive, which leads to peeling. The solution is to control the moisture content of the base material, the amount of crosslinking agent added, and the sealing of the rubber bottle or barrel packaging to solve the problem of adhesive peeling. As long as the adhesive does not peel, this phenomenon will not occur.
3. The surface of silicone adhesive turns yellow after construction. This phenomenon is mainly caused by the addition of aminosilane (such as KH550/792) in the production of silicone adhesive and the decomposition of amino groups under sunlight.