2results about How to "Low polymerization shrinkage" patented technology

The application discloses a low-shrinkage antibacterial denture base resin composite material and a preparation method thereof, relates to the field of preparation of the low-shrinkage antibacterial denture base resin composite material, and comprises a methyl methacrylate resin matrix, grafted modified nano silicon dioxide, a chitosan zinc composite antibacterial powder and a crosslinking modified additive. The low-shrinkage antibacterial denture base resin composite material and the preparation method thereof have the advantages that the process steps are progressive and mutually complementary, the modification of the powder provides a structural basis for low shrinkage and long-acting antibacterial properties, the gradient curing and locking of the modified powder lock the functional characteristics, the post-processing technology further stabilizes the comprehensive performance of the material, the problems that the antibacterial performance, the low-shrinkage performance and the mechanical performance cannot be considered simultaneously in the traditional technology are solved, and through the synergistic process of powder fine pretreatment, step-by-step homogeneous mixing, gradient segmented prepolymerization curing and constant-temperature aging post-processing, remarkable technical progress and practical effects are achieved.

This invention relates to a multifunctional bioactive dental bulk filling composite resin and its preparation method. The composite resin comprises an organic resin matrix and an inorganic filler; the organic resin matrix comprises polymerizable resin monomers and a photoinitiator system, the polymerizable resin monomers comprising dimethacrylate monomers and E-POSS; the inorganic filler comprises nMgO and sSiO2 with a silanized surface. The preparation method includes the following steps: preparing nMgO powder using a sol-gel method combined with a gradient calcination process; preparing submicron-sized sSiO2 using the Stöber method and subjecting it to surface silanization treatment to obtain silanized sSiO2; mixing the polymerizable resin monomers, E-POSS, and the photoinitiator system, stirring in the dark until a homogeneous resin matrix is ​​formed; adding the obtained nMgO and silanized sSiO2 to the resin matrix in a specific ratio and mixing and dispersing evenly to obtain an uncured paste-like composite resin.