Process for improving shelf stability of liquid overbased...

C - Chemistry – Metallurgy – 07 – C

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C07C 51/41 (2006.01) C08K 3/26 (2006.01) C08K 5/098 (2006.01)

Patent

CA 2300199

Shelf stable liquid overbased calcium carboxylates are prepared by reacting a calcium base with a monocarboxylic acid, and carbonating in the presence of a promoter mixture with a phenol and an alcohol under controlled temperature conditions, to produce shelf stable liquids. Mixed metal stabilizer compositions are prepared by blending the stable liquid calcium carboxylate with a metal carboxylate of zinc, cadmium or tin. The mixed metal carboxylates are also shelf stable and are used for stabilizing halogen-containing polymers to provide heat stability, clarity and improved plate out properties.

L'invention concerne des carboxylates de calcium hyperbasiques liquides longue conservation que l'on prépare en faisant réagir une base de calcium avec un acide monocarboxylique, et en carbonatant le produit obtenu en présence d'un mélange promoteur avec un phénol et un alcool, dans des conditions de température régulées, afin de produire des liquides longue conservation. Des compositions de stabilisants métalliques mélangées sont préparées par mélange du carboxylate de calcium liquide stable avec un carboxylate métallique de zinc, de cadmium ou d'étain. Les carboxylates métalliques mélangés sont également des produits longue conservation, qui sont utilisés pour stabiliser les polymères halogénés en vue de l'obtention d'une stabilité thermique, d'une limpidité et de propriétés de dépôt améliorées.

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