Organic polymers containing polyethylene or polystyrene polysiloxane diblock copolymers as melt processing aids
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United States of America Patent
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Dec 18, 2001
Grant Date -
N/A
app pub date -
Nov 17, 1999
filing date -
Nov 25, 1998
priority date (Note) -
Expired
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Abstract
The present invention provides organic polymers and compounds containing such polymers which have enhanced melt processing characteristics. A composition of the present invention includes at least one organic polymer and from 0.1 percent by weight to 5 percent by weight of a diblock copolymer of polystyrene and a polysiloxane or polyethylene and a polysiloxane. The overall weight average molecular weight of the diblock copolymer ranges from 500 to 50,000. The polysiloxane content of the block copolymer is from 20 to 90 percent by weight. The organic polymer incorporating the above-described melt processing aid can be incorporated into a compound of the organic polymer and another polymer and/or an oil and/or a filler material. Preferably, the composition includes two different organic polymers, especially including a block copolymer.
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