Spray coated polyurea applications are increasing, owing to ease of application, adhesive properties, rapid cure time and excellent mechanical properties, in niche areas compared to traditional coatings. Researchers from India investigated the effects of cross-linking on spray-coated polyurea. For this purpose, a long chain trifunctional amine was used from 0 to 3.5 mol % as a co-reactant in the resin blend. It was shown that cross-linking spray coated polyurea coating showed tensile strength ∼ 7.4 ± 0.7 MPa and elongation of 121 ± 3.7% and cross-linking led to an improvement in these characteristic properties till maxima at 2.2 mol%. However, glass transition temperatures of coatings increased since chemical cross-linking led to the restraining of the segmental motions.

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Journal reference:Progress in Organic Coatings

Provided by: © 2018 Elsevier B.V.

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