C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 7/12 (2006.01) A21B 3/00 (2006.01) C09D 5/00 (2006.01) C09D 123/22 (2006.01) F24C 15/00 (2006.01)
Patent
CA 2235478
A mixture of two stabilizers, one including benzene rings bearing hydroxyl substituents and the other containing divalent sulfur atoms, is effective in stabilizing tacky polymers that remain solid up to a temperature of at least 160 ~C, particularly polymers of isobutylene, so that the polymers give long service in the ambient atmosphere as protective layers coated on aluminum substrates and used to line the interiors of paint baking ovens. When accumulated foreign materials accumulate on the coatings, the coating and the accumulated foreign materials can be decomposed to largely volatile products by heating to a temperature substantially higher than the service temperature but not high enough to melt the metal substrate for the coating.
L'invention porte sur un mélange de deux stabilisateurs dont l'un comporte des substituants hydroxyle portant des cycles benzène et l'autre des atomes de soufre divalents s'avérant capables de stabiliser des polymères collants restant solides jusqu'à une température d'au moins 160 ·C, et en particulier des polymères d'isobutylène pouvant ainsi avoir une longue vie utile en atmosphère ambiante comme couche protectrice de substrats d'aluminium et de doublage des parois intérieures de fours de cuisson de peinture. Lorsque des matériaux étrangers s'accumulent sur les revêtements, ces derniers ainsi que le matériau accumulé se décomposent en produits très volatiles à une température sensiblement supérieure à celle de fonctionnement, mais pas élevée au point de faire fondre le substrat métallique du revêtement.
Jarema Chester P.
Stuart Michael A.
Henkel Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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