Method for making overbased pvc stabilizer

Details Method for making overbased pvc stabilizer Method for making overbased pvc stabilizer

C - Chemistry, Metallurgy

08

K

C08K 5/098 (2006.01) C08L 27/06 (2006.01)

Patent

CA 2224202

An overbased mixture of aliphatic and aromatic carboxylate salts useful in making low-fogging thermal stabilizers for PVC is made by reacting zinc oxide with fatty acid and such as stearic acid, then adding aromatic acids, and then adding and reacting one or both of magnesium oxide and calcium oxide, under controlled heating conditions to maintain fluidity while minimizing side reactions, and then conditioning the reaction product to remove volatiles.

L'invention se rapporte à un mélange surbasique de sels de carboxylates aliphatiques et aromatiques utile dans la fabrication de stabilisateurs thermiques à faible effet de brouillard pour PVC, que l'on obtient en faisant réagir de l'oxyde de zinc avec un acide gras, tel que l'acide stéerique, et en ajoutant ensuite des acides aromatiques, puis en ajoutant et en faisant réagir de l'oxyde de magnésium et/ou de l'oxyde de calcium, dans des conditions de chauffage régulées pour maintenir la fluidité tout en réduisant au minimum les réactions secondaires, et enfin en conditionnant le produit de réaction dans le but d'éliminer les éléments volatils.

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