Effects of Shell Thickness of Thermally Expandable Microspheres on the Application of Underbody Coating for Vehicles

Jin-Wook Park; Sang-Jin Lee; Sang-Hoon Ji; Hae-Na You; Ji-Hoo Kim; Kwang-Ji Ryu

doi:10.20944/preprints201906.0284.v1

Preprint Article Version 1 This version is not peer-reviewed

Version 1 : Received: 26 June 2019 / Approved: 27 June 2019 / Online: 27 June 2019 (07:52:13 CEST)

This research was conducted to manufacture thermally expandable microspheres (TEMs) for vehicles’ underbody coating and to apply them on an industrial scale. TEMs heat resistance was studied depending on the ratios of a cross-linking agent and an initiator. This research focused on the content of a cross-linking agent and how it affected the results. The TEMs’ outer shell was thickened to solve the problem of the foam expansion ratio’s reduction that occurred due to the shrinkage after the maximum expansion (Tmax) was reached. After foaming, the cross-sectional thickness and surface of the sample with thickened outer shell were observed. The TEMs with the thickened shell showed the least shrinkage, which indicated excellent shrinkage stability, even after prolonged exposure to heat.

TEM; underbody coating; UBC; FIB; thermally expandable microspheres

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Effects of Shell Thickness of Thermally Expandable Microspheres on the Application of Underbody Coating for Vehicles

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