Technology

Preparation and compatibility of high solid fluorocarbon coatings

  • FANG J J ,
  • ZHANG W L ,
  • XU K ,
  • et al
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  • 1. CNOOC Changzhou EP Coating Co., Ltd., Changzhou,Jiangsu 213012,China;

    2. CNOOC Changzhou Paint & Coatings Industry Research Institute Co., Ltd., Changzhou,Jiangsu 213016,China

Online published: 2024-10-01

Abstract

A high solid fluorocarbon coating was developed by using the high solid fluorocarbon resin as the binder,the weatherproof isocyanates as the curing agent. The effects of different curing agents,different R value(molar ratio of —NCO to —OH), the dosage of curing catalyst,photostabilizers(ultraviolet absorbers and hindered amine photostabilizers)and their dosage on the performance of the fluorocarbon coatings were discussed. The results indicated that the prepared product with nonvolatile content of 82% exhibited excellent weatherability of gloss retention rate up to 80% and color deviation of ΔΕ ≤3 after 3 000 h artificial aging. To ensure excellent compatibility with the intermediate paint,modified polyamide or modified phenakamide with low polar should be used as curing agents for the intermediate paint. The high solid fluorocarbon coating itself exhibited limited recoating
intervals because the intercoating adhesion failure would occur when the recoating intervals exceeded a certain period of time. The formulated high solid fluorocarbon coating meets the practical application needs and development in the field of coating chemistry.

Cite this article

FANG J J , ZHANG W L , XU K , et al . Preparation and compatibility of high solid fluorocarbon coatings[J]. Paint & Coatings Industry, 2024 , 54(10) : 53 -59 . DOI: 10.12020/j.issn.0253-4312.2024-169

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