Tertiary amine polyamidoamine-epihalohydrin polymers

C - Chemistry – Metallurgy – 08 – G

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C08G 73/02 (2006.01) C08G 69/48 (2006.01)

Patent

CA 2330915

A process for preparing a tertiary amine polyamidoamine-epihalohydrin polymer having a low level of epihalohydrin byproducts. In this process a tertiary amine polyamidoamine prepolymer is reacted with an epihalohydrin; the molar ratio, of epihalohydrin to tertiary amine groups in the polyamidoamine prepolymer, is less than 1.0 to 1Ø The reaction is further conducted at a pH of from about 7.5 to less than about 9.0, in the presence of a nonhalide acid, and at a temperature of not more than about 35 °C.

L'invention concerne un procédé de préparation de prépolymère d'épihalohydrine-polyamidoamine à amine tertiaire, à faible teneur en sous-produits d'épihalohydrine. Dans ledit procédé, on fait réagir un prépolymère de polyamidoamine à amine tertiaire avec une épihalohydrine; le rapport molaire entre l'épihalohydrine et les groupes d'amine tertiaire du prépolymère de polyamidoamine, est inférieur à 1,0 pour 1,0. On conduit la réaction à un pH d'environ 7,5 à moins de 9,0, en présence d'un acide non-haloïde, et à une température d'au plus environ 35 DEG C.

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