Transformative wavelength conversion medium

摘要

A transformative wavelength conversion medium is provided, comprising: a phosphor; and, a curable liquid component, wherein the curable liquid component, comprises: an aliphatic resin component, wherein the aliphatic resin component has an average of at least two epoxide groups per molecule; and, a curing agent; wherein the curable liquid component contains less than 0.5 wt % of monoepoxide molecules (based on the total weight of the aliphatic resin component); wherein the curable liquid component contains 1 to 90 wt % of polyepoxide molecules containing at least three epoxide groups per molecule (based on the total weight of the aliphatic resin component); and, wherein the curable liquid component is a liquid at 25° C. and atmospheric pressure; wherein the phosphor is dispersed in the curable liquid component.

主权项

1. A transformative wavelength conversion medium, comprising:
a phosphor dispersed in a curable liquid component; wherein the curable liquid component comprises a curing agent and an aliphatic resin component; wherein the aliphatic resin component has an average of at least two epoxide groups per molecule and contains at least 50 wt % of alicyclic diepoxide molecules having at least one alicyclic skeleton per molecule, 20 to 50 wt % of polyepoxide molecules containing at least three epoxide groups per molecule, and less than 0.5 wt % of monoepoxide molecules, all based on the total weight of the aliphatic resin component; wherein the alicyclic diepoxide molecules are selected from the group consisting of diglycidyl ethers of molecules according to formula (I)  and mixtures thereof; wherein each R1 is independently selected from the group consisting of a H, a C1-6 hydrocarbyl group and a C1-6 hydrocarbylene group; wherein each R2 is independently selected from the group consisting of a C1-12 hydrocarbyl group, a C1-12 alkoxy group and a C1-12 oxo organyl group; wherein each q is independently selected from the group consisting of 0 and 1; and, wherein each v is independently selected from the group consisting of 0, 1 and 2; wherein the polyepoxide molecules are selected from the group consisting of triglycidyl ether containing molecules according to formula (A)  triglycidyl ether containing molecules according to formula (B)  and mixtures thereof; and wherein the curable liquid component is a liquid at 25° C. and atmospheric pressure; and the curable liquid component exhibits a yellowness index of less than or equal to 20 when in a cured state.