Hydrophilic emulsifiers based on polyisobutylene

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 10/10 (2006.01) B01F 17/00 (2006.01) B01F 17/52 (2006.01) C08F 8/00 (2006.01) C08G 81/02 (2006.01) C09D 5/08 (2006.01) C09D 123/26 (2006.01) C11D 3/37 (2006.01) C23F 11/173 (2006.01)

Patent

CA 2461914

The invention relates to ampiphilic compounds and mixtures thereof, methods for production and use thereof in oil-in-water emulsions. The compounds are made up of a lipophilic and a hydrophilic part. Both parts are linked together by means of a linker derived from succinic acid. The lipophilic part is formed from a polyisobutylene group with a number-average molecular weight Mn of 300 to 10000. The hydrophilic part is characterised in preferably having two polyethylene glycol chains which can be produced by reaction of OH, -N(H)- and/or -NH2 with ethylene oxide. A globular non-linear structure for the hydrophilic part is thus achieved, such that the hydrophilic character of said compounds predominates and makes the same particularly suitable for oil-in- water emulsions. The invention further relates to preparations for the treatment of metal surfaces, in particular for corrosion protection, comprising at least one said compound, at least one solvent which can dissolve, disperse or emulsify said compound(s) and optionally further components. Furthermore, a method for treatment of metal surfaces by bringing the metal surface into contact with said preparation and coated metal surfaces are disclosed.

L'invention concerne des composés amphiphiles et leurs mélanges ainsi que leurs procédés de préparation et leur utilisation dans des émulsions de type aqueux. Ces composés sont constitués d'une partie lipophile et d'une partie hydrophile. Ces deux parties sont liées par une liaison dérivée de l'acide succinique. La partie lipophile est formée par un groupe polyisobutylène ayant un poids moléculaire moyen M¿n? de 300 à 10000. La partie hydrophile est caractérisée en ce que l'on obtient au moins deux chaînes de polyéthylèneglycol en faisant réagir OH, -N(H)- et/ou -NH¿2? avec de l'oxyde d'éthylène. On obtient ainsi une partie hydrophile de structure globulaire non linéaire globulaire de telle manière que le caractère hydrophile des composés selon l'invention est prédominant et que ces composés sont particulièrement adaptés aux émulsions de type aqueux. L'invention concerne également des préparations de traitement de surfaces métalliques destinées notamment à la protection contre la corrosion et contenant au moins un composé selon l'invention, au moins un solvant capable de dissoudre, disperser et mettre en suspension ou émulsionner le/les composé(s) selon l'invention et éventuellement d'autres composés. L'invention concerne un procédé de traitement de surfaces métalliques consistant à mettre la préparation selon l'invention en contact avec ces surfaces métalliques. Enfin, l'invention concerne des surfaces métalliques revêtues.

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