Primer and adhesive compositions based on chlorinated...

C - Chemistry – Metallurgy – 09 – J

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C09J 123/28 (2006.01) C08L 61/06 (2006.01) C09J 161/06 (2006.01) C08L 23/28 (2006.01)

Patent

CA 2179633

Adhesive compositions based on chlorinated polyolefins having chlorine contents greater than about 60 percent and molecular weights greater than about 500. The adhesive compositions contain the chlorinated polyolefin and a phenolic resin. The chlorinated polyolefins are advantageous in that they can be prepared in an environmentally acceptable manner and can be utilized as a substitute for the traditional chlorinated natural rubber materials utilized in adhesive compositions without compromising adhesive performance. Preferred chlorinated polyolefins are prepared by a process involving the dispersion and chlorination of high surface area polyolefinic particles in an aqueous medium.

Compositions adhésives à base de polyoléfines chlorées ayant une teneur en chlore supérieure à environ 60 pour cent et des poids moléculaires supérieurs à environ 500, qui contiennent la polyoléfine chlorée et une résine phénolique. Lesdites polyoléfines chlorées sont avantageuses en cela qu'elles peuvent être préparées sans danger pour l'environnement et peuvent être utilisées pour remplacer les matériaux en caoutchouc naturel chloré traditionnels utilisés dans les compositions adhésives, sans compromettre les propriétés adhésives. Les polyoléfines chlorées préférées sont préparées selon un procédé comprenant la dispersion et la chloration de particules polyoléfiniques à aire de surface élevée dans un milieu aqueux.

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