Back to results
US 5,672,646 AGranted
Stabilizing composition for chlorine-containing polymer comprising .beta.-diketones
AssigneeRhone-Poulenc Chimie
InventorsMichel Allas, Serge Chassaing, Michel Gay, Gilles Mur
Life of this patent
Estimating the term…
Abstract
The present invention relates to a stabilizing composition for a chlorine-containing polymer (PVC), characterized in that it comprises the unpurified crude product resulting from the reaction of an ester with a ketone in the presence of an alkaline agent, this crude product comprising at least 10 % by weight of .beta.-diketone and being in the form of a powder.
Claims15
A chlorine containing polymer including a stabilizing composition wherein the stabilizing composition comprises:
- (i) the crude product resulting from the condensation reaction of an ester with a ketone in the presence of a alkaline agent, wherein the said crude product comprises between 10 and 95 percent by weight of .beta.-diketones and between 90 and 5% by weight of by-products from the condensation reaction, and wherein said crude product is in the form of a powder;
- and
- (ii) an effective quantity of a supplementary additive.
The composition according to claim wherein R.sub.1 and R.sub.3, which may be identical or different, denote:
- a linear or branched aralkyl or alkenyl radical containing up to 24 carbon atoms,
- an aralkyl radical containing 7 to 10 carbon atoms,
- an aryl or cycloaliphatic radical containing fewer than 14 carbon atoms, R4 denotes an alkyl radical containing from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.