Compositions for use with chlorinated polymers
AssigneeRhone-Poulenc Chimie
InventorsLouis Carette, Gerard Velleret
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Abstract
A novel composition for use in chlorinated polymers comprising: a) dawsonite, hydrotalcite or a mixture thereof, b) a (.gamma.-hydroxyalkyl)polyorganosiloxane oil, c) an organic zinc compound, and d) an organic calcium, magnesium, barium or lanthanide compound, or a mixture thereof is disclosed, The presence of the polyorganosiloxane oil enables the content of epoxidized oils to be decreased while preserving the thermal stability of the polymer composition. The impact strength of shaped articles prepared from polymers containing compositions of the present invention is also enhanced.
Claims22
A composition comprising:
- a) dawsonite, hydrotalcite, or a mixture thereof,
- b) a (.gamma.-hydroxyalkyl)polyorganosiloxane oil of general formula (I) ##STR3## wherein, R, which may be the same or different, represent a methyl or phenyl radical, with at least 60 mol% of R being methyl radicals,
- R' represents a linear or branched alkylene radical having 2 to 6 carbon atoms,
- p represents an average number from 1 to 30, and
- q represents an average number from 1 to 100,
- c) an organic zinc compound, and
- d) an organic calcium, magnesium, barium or lanthanide compound, or a mixture thereof.
A stabilized composition comprising:
- a) a chlorinated polymer,
- b) dawsonite, hydrotalite or a mixture thereof,
- c) a (.gamma.-hydroxylalkyl)polyorganosiloxane oil of general formula (I) ##STR4## wherein, R, which may be the same or different, represent a methyl or phenyl radical, with at least 60 mol% of R being methyl radicals,
- R' represents a linear or branched alkylene radical having 2 to 6 carbon atoms,
- p represents an average number from 1 to 30, and
- q represents an average number from 1 to 100,
- d) an organic zinc compound, and
- e) an organic calcium, magnesium, barium or lanthanide compound, or a mixture thereof.
Dependencies are inferred from the claim text.