Near-infrared control coating, articles made therefrom, and methods for producing the same
DE602020054157T2Active Publication Date: 2025-07-09PPG INDUSTRIES OHIO INC
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Patent Information
- Application Number
- DE602020054157
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2019-01-07
- Filing Date
- 2020-01-07
- Publication Date
- 2025-07-09
- Estimated Expiration
- 2040-01-07
AI Technical Summary
Technical Problem
Autonomous vehicles face challenges in accurately detecting the size and position of retroreflective substrates due to excessive near-infrared (NIR) electromagnetic radiation reflection, leading to system saturation and inaccurate navigation.
Method used
A coating composition comprising a resin and pigments like zinc oxide, alumina, antimony tin oxide, tungsten oxide, gold nanoparticles, and others, which absorb and/or scatter electromagnetic radiation in the NIR range, reducing NIR retroreflectance while maintaining sufficient visible retroreflectance.
Benefits of technology
The coating effectively reduces NIR retroreflectance by up to 99% while maintaining visible retroreflectance, enabling accurate detection and navigation by autonomous vehicles.
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