Impact modifier compositions for rigid PVC compositions of hydrocarbon rubbers and chlorinated polyethylene
AssigneeDuPont Dow Elastomers L.L.C.
InventorNobuhiro Hata
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Abstract
The present invention is specifically directed to improved polyvinyl chloride compositions having excellent impact strength. In particular, the impact resistant composition comprises a vinyl chloride polymer and 2-8 parts of an impact modifier composition comprising at least one ethylene/alpha-olefin copolymer and at least one chlorinated olefin polymer per 100 parts of the vinyl chloride polymer. Preferably the impact modifier composition comprises less than 1 part of the ethylene/alpha-olefin copolymer and the ratio of said copolymer to the total modifier composition is less than 25%.
Claims6
1) A impact modifier composition for vinyl chloride polymers comprising 2-8 parts per 100 parts vinyl chloride polymer of:
- a) at least one ethylene/alpha-olefin copolymer and
- b) at least one chlorinated polyolefin
- wherein said impact modifier composition contains less than 1 part ethylene/alpha olefin copolymer and the ratio of ethylene/alpha olefin copolymer to the total impact modifier compostion is less than 25%.
Dependencies are inferred from the claim text.