Overbased pvc stabilizer

Details Overbased pvc stabilizer Overbased pvc stabilizer

C - Chemistry, Metallurgy

08

K

C08K 13/02 (2006.01) C08K 3/26 (2006.01) C08K 3/34 (2006.01) C08K 5/098 (2006.01) C08K 5/3492 (2006.01)

Patent

CA 2224398

PVC stabilizers containing an overbased mixture of salts, such as magnesium and zinc salts, of unsubstituted and/or alkyl-substituted benzoic acid and optionally one or more fatty aliphatic acids, which contain a carbonate and/or silicate stabilizer, and which preferably also contain one or more polyols containing 2 to 10 hydroxyl groups, exhibit significant and unexpected reduction in the tendency to volatilize and form "fog" upon exposure of the formulation to moderately elevated temperatures, without loss of other desirable stabilization properties.

L'invention se rapporte à des stabilisateurs de PVC contenant un mélange surbasique de sels tels que par exemple, des sels de magnesium et de zinc, d'acide benzoïque non substitué et/ou à substitution alkyle et, éventuellement, un ou plusieurs acides aliphatiques gras, qui contiennent un stabilisateur au carbonate et/ou au silicate et qui, de préférence, contiennent un ou plusieurs polyols dont le nombre de groupes hydroxyle est compris entre 2 et 10. L'ensemble offre une réduction appréciable et inattendue en ce qui concerne la tendance à la volatilisation et la formation de brouillard lors d'une exposition à des températures modérément élevées, sans disparition par ailleurs des autres propriétés de stabilisation souhaitables.

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