Polyurea elastomer systems with improved adhesion to substrates

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 75/04 (2006.01) C04B 41/52 (2006.01) C08G 18/12 (2006.01) C08G 18/32 (2006.01) C08G 18/36 (2006.01) C08G 18/50 (2006.01) C08G 18/62 (2006.01) C08G 18/66 (2006.01) C08G 18/72 (2006.01) C08L 75/02 (2006.01) C09D 175/02 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2291816

Polyurea elastomer systems have improved adhesion to a substrate with the use of a primer that is applied first. The primer is composed of hydrophobic, primary hydroxyl-containing compound, for example, castor oil, and an isocyanate. It is not necessary to wait for the primer to cure prior to applying of the polyurea elastomer system. The primer system is particularly useful on wet substrates, where the primer penetrates the substrate prior to polyurea elastomer spraying. Regardless of whether the substrate is dry or wet, adhesion is improved.

Systèmes élastomères de polyurée qui présentent une adhérence améliorée sur un substrat grâce à l'utilisation d'un apprêt qui est appliqué en premier. Ledit apprêt est constitué d'un composé hydrophobe contenant de l'hydroxyle primaire, par exemple de l'huile de ricin, et un isocyanate. Il n'est pas nécessaire d'attendre que l'apprêt soit polymérisé pour appliquer le système élastomère de polyurée. Ledit apprêt est particulièrement utile sur des substrats humides étant donné qu'il pénètre dans le substrat avant la pulvérisation d'élastomère de polyurée. L'adhérence s'en trouve améliorée, que le substrat soit humide ou sec.

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