Unsaturated spiro orthocarbonate expanding monomer as well as synthesis method and application thereof

Abstract

The invention provides an unsaturated spiro orthocarbonate expanding monomer. The synthesis method of the unsaturated spiro orthocarbonate expanding monomer comprises the steps of (1) weighing 6, 8-dihydroxy-1-nonene, di-n-butyltin oxide and toluene, adding into a reaction container, stirring, and reacting at the temperature of 150+ / -2 DEG C; (2) cooling the reaction liquid in the reaction container to room temperature, dropwise adding carbon disulfide into the reaction liquid, heating the reaction liquid to the temperature of 110+ / -2 DEG C, and continuing the reaction; and (3) cooling the reaction liquid to room temperature, removing toluene in the reaction liquid, washing, recrystallizing, and drying in vacuum to obtain the unsaturated spiro orthocarbonate expansion monomer. The unsaturated spiro orthocarbonate expanding monomer can be used as an anti-curing shrinkage component of an organic silicon resin packaging material. The unsaturated spiro orthocarbonate expanding monomer synthesized by the invention not only can expand through ring-opening polymerization, but also can react with an alkene monomer, acrylic resin or vinyl hydrogen-containing silicon resin, so that the shrinkage rate of the resin can be reduced.

Description

technical field [0001] The invention relates to an expansion monomer, in particular to a synthesis method of an unsaturated spiro ring orthocarbonate expansion monomer and the application of the unsaturated spiro ring orthocarbonate expansion monomer in the preparation of silicone resin encapsulation materials. Background technique [0002] Thermosetting resins will inevitably shrink in volume during the curing process, resulting in shrinkage stress and becoming a potential destructive factor, which will lead to a sharp drop in material strength, or even cracking of the material; or lead to deterioration of the performance of electronic or optical components, parameters Drift; or cause the glued interface to be more susceptible to environmental factors such as water and acid. The causes of curing shrinkage include the overflow of solvent molecules, the elimination of small molecules, and the effect of Van der Waals force between monomer molecules into covalent bond after cur...

AI Technical Summary

Problems solved by technology

[0004] However, the general spiro ring orthocarbonate expansion monomer, because it does not contain other active functional groups, cannot react with vinyl monomers, silicone resins, etc., so its shrinkage reduction effect in other thermosetting resin systems is obviously not as good as that of ring ring Oxygen resin, which limits the further widespread application of expanded monomers

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