Mixtures of polypropylene and liquid saturated diorganopolysiloxanes
AssigneeBayer Aktiengesellschaft
InventorsUlrich Grigo, Leo Morbitzer, Klaus-Peter Arlt, Rudolf Binsack, Josef Merten
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Abstract
A homogeneous, thermoplastic mixture comprising (A) from 85 to 99.5% by weight of isotactic polypropylene; and (B) from 15 to 0.5% by weight of a liquid, saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 cSt at 20.degree. C. The elastic properties of moulded articles produced from the polypropylene/diorganopolysiloxane mixtures of the present invention are substantially improved by the addition of small quantities of diorganopolysiloxane while their dimensional stability under heat and their rigidity are largely preserved.
Claims7
A homogeneous thermoplastic mixture comprising
- (A) from 85 to 99.5% by weight of isotactic polypropylene having an isotactic portion of more than 90% by weight and a melt index of from 0.1 to 20 g/10 min at 230.degree. C. under a load of 5 kg;
- and
- (B) from 15 to 0.5% by weight of a liquid, saturated diorganopolysiloxane having a viscosity of from 30,000 to 80,000 cSt at 20.degree. C.
Dependencies are inferred from the claim text.