Silicone rubber is a linear structure of molecular reinforcement after vulcanization cross-linked into a three-dimensional structure, containing trace hydroxyl end, anti-aging performance is not good enough, white carbon black reinforcement of light transmittance is poor, silicone resin reinforcement of light transmittance is better; Mechanical properties are generally better than silicone resin; Elasticity, softness, good heat and weather resistance, small internal stress, the shortcoming is that the space between the molecular chains is large, air permeability, oxygen permeability, moisture permeability is large. Adhesive strength of general temperature -50-200 range.


Silicone is a three-dimensional structure of molecular crosslinking into a larger three-dimensional structure, containing a small amount of hydroxyl terminal, anti-aging than silicone rubber is much better. Hardness, good light permeability, air permeability, moisture permeability, oxygen permeability, mechanical properties are generally worse than silicone rubber.


Silicone resin has outstanding weather resistance, is any kind of organic resin, even in the ultraviolet strong irradiation, silicone resin also resistance to yellowing.
 
At present, most of the LED photoelectric market is widely used in the methyl organic silica gel, phenyl organic silica gel due to high cost, only used in the field of high requirements.