5results about "Dental impression compositions" patented technology

This invention provides a dental silicone rubber impression composition, a material kit, and a method for preparing the same. The impression composition includes a reinforcing filler with a nanometer-sized particle size, and the particle size distribution of the reinforcing filler satisfies D[4,3]-D[3,2]=A, where A is 0~200nm. The above-mentioned solution provided by this invention ensures that the dental silicone rubber impression material has lower roughness while maintaining its mechanical properties. It also avoids the agglomeration of reinforcing particles within the silicone rubber matrix, which could affect the overall flowability of the impression material, and improves processing difficulty. Furthermore, the impression material exhibits a faster curing speed.

One aspect of the present invention includes, in antibacterial polymer particles, a crosslinked copolymer having a structural unit derived from a monofunctional monomer having an antibacterial group, and a structural unit derived from a polyfunctional monomer. A water absorption capacity of the antibacterial polymer particles is 3 g / g or more.

The present invention is related to a curable composition for dental impression comprising: a curable base composition and a surfactant system comprising a first surfactant, which is at least one compound having formula (I) and a fluorotelomer having formula (II), which works synergistically with the fluorotelomer so as to permit the composition to surprisingly have a lower contact angle; these results are reached with relatively low concentrations of biodegradable surfactants.

The application belongs to the technical field of impression materials, and discloses a transparent silicone rubber material for dental impression, and a preparation method and application thereof.The transparent silicone rubber material comprises a base material and a catalyst; the base material comprises the following components: vinyl-terminated polydimethylsiloxane, phenylmethyl silicone oil, nano-silicon dioxide, methyl triethoxysilane and polyether modified polysiloxane; and the catalyst comprises the following components: hydrogen-containing silicone oil, platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane, 1-ethynyl-1-cyclohexanol and cerium oxide.The obtained transparent silicone rubber material has excellent transparency, the light transmittance of which is greater than 90%, the elastic modulus of which can reach 1.41 MPa, the compression rate at room temperature of which is as low as 1.81%, the curing time of which is moderate, the clinical operation time is ensured, the curing time is shortened to a certain extent, and the biological safety meets the standards.

This invention relates to the field of polymer materials technology, and more particularly to an antibacterial photocurable resin composition, its preparation method, and its application. The antibacterial photocurable resin composition provided by this invention comprises the following raw materials in parts by weight: 35-65 parts of polyurethane copolymer, 30-60 parts of reactive diluent monomer, 0.1-2.0 parts of AIE functional polymer, and 1-6 parts of photoinitiator; the AIE functional polymer contains polymerizable groups; the raw materials for preparing the polyurethane copolymer include isocyanate and diol, the diol including cashew nut glycol, with cashew nut glycol accounting for 20-80% of the molar percentage of the diol. The antibacterial photocurable resin composition provided by this invention possesses both excellent mechanical properties and high curing efficiency, and has a long-lasting, safe, and highly efficient phototriggered endogenous antibacterial function.