Dual-cure dental resins and adhesives with increased cure and color stability and low color

摘要

Various embodiments of the present invention generally relate to a light-cure and dual-cure resin that have low color and is color stable over conventional light, self and dual-cured resins. Additionally, the light-cure resin has enhanced degree of cure over conventional light-cure resins. Finally, due to the low color and enhanced color stability of the dual-cure resins, their inherent property of having lower shrinkage stress as compared to light-cure resins can now be utilized in various dental applications and other resin applications.

主权项

1. A hardenable composition comprising a light-curable component and a self-curable component, wherein said light-curable component comprises:
an onium compound, a photosensitizer, and a resin system comprising a free radically active functional group and having no cationically active functional group, wherein said light-curable component is not miscible in water, and said self-curable component comprises a reducing agent and an oxidizing agent, wherein the reducing agent is selected from the group consisting of a urea reducing agent and a thiourea reducing agent, wherein the hardenable composition is formed by free radical polymerization of the resin system, and wherein the hardenable composition has an initial b* color value of less than 20 and a ΔE of less than 10, wherein ΔE represents the color change of the composition upon curing and is calculated using the equation ΔE=[(ΔL*)2+(Δa*)2+(Δb*)2]1/2, and L* represents the lightness variable of the composition's color and a* and b* represent the chromatic characteristics of the composition's color in the CIE color system.