| abstract |
The invention provides a silicone tackifier and its preparation method and application. The silicone tackifier has the general formula shown in formula (I); wherein, a+b+c=1, 0≤a<1 , 0≤b<1, 0<c<1; R 1 and R 2 are independently selected from one or more of phenyl, 3-glycidyl etheroxypropyl and methyl; Me is methyl, Vi is vinyl. Compared with the prior art, the silicone tackifier provided by the present invention contains groups such as phenyl, vinyl and epoxy groups, and by controlling the ratio of the above-mentioned different groups, the silicone tackifier has a higher High refractive index and good viscosity-increasing effect, and at the same time, it can have good compatibility with different substrates, so it is suitable for the adhesion of different substrate silica gels, especially suitable for the application of LED high-fold packaging silica gel. Experimental results show that the silicone tackifier provided by the present invention can have a refractive index of more than 1.53 and has an excellent tackifying effect. |