High-transmittance color-changing grinding stone and preparation process thereof

By introducing low-refractive-index methyl methacrylate and a flexible thioether crosslinking network into unsaturated polyester resin, and combining this with a latent catalyst to control the reaction, the problems of high haze, high shrinkage, and residual bubbles in the unsaturated polyester resin grinding system in high-transmittance optoelectronic integration scenarios were solved. This resulted in a grinding material with high transmittance and low shrinkage, protecting the embedded optoelectronic components.

CN122233685APending Publication Date: 2026-06-19WUHAN JINXIU FLOOR CONSTRUCTION ENGINEERING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN JINXIU FLOOR CONSTRUCTION ENGINEERING CO LTD
Filing Date
2026-03-19
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing unsaturated polyester resin grinding systems have problems in high-transmittance optoelectronic integration scenarios, such as high internal haze and poor light transmittance due to the refractive index mismatch between the matrix and aggregate, high curing volume shrinkage rate which can easily lead to stress damage to embedded optoelectronic components, and difficulty in controlling reactivity, resulting in residual air bubbles during thick-layer construction.

Method used

Methyl methacrylate with low refractive index is used to replace styrene as the crosslinking monomer. It is combined with pentaerythritol tetra(3-mercaptopropionate) and unsaturated polyester resin to carry out thiol-ene click chemistry to form a flexible thioether bond crosslinking network. A latent zinc-acetylacetone catalyst is used to control the curing reaction. A balance between a long operating window and rapid curing is achieved through a temperature switching mechanism.

Benefits of technology

The refractive index was homogenized, haze was reduced, and light transmittance was improved. The introduction of flexible sulfide bonds reduced the curing volume shrinkage rate and protected the embedded optoelectronic components. At the same time, the curing reaction time was controlled to avoid bubble residue and ensure the optical and mechanical properties of the material.

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Abstract

This invention relates to the field of building decoration materials technology, and discloses a high-transmittance iridescent terrazzo and its preparation process. The terrazzo is made from isophthalic acid-neopentyl glycol type unsaturated polyester resin, methyl methacrylate, pentaerythritol tetra(3-mercaptopropionate), fumed silica, peroxide initiator, surface-modified high-transmittance aggregate, and a latent zinc-acetylacetone catalyst. By adjusting the methyl methacrylate content, the absolute value of the refractive index difference between the resin matrix and the aggregate is made less than 0.01, achieving high transmittance. Flexible segments are introduced using a thiol-ene click chemistry reaction, reducing curing shrinkage and preventing damage to the embedded LED components. The preparation process employs a latent catalytic system, combined with stepwise vacuum mixing and 60-70℃ thermally triggered curing, resolving the contradiction between residual air bubbles in thick materials and short operating time, and achieving integrated encapsulation of optoelectronic components.
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