Low density polyethylene modified with silicone materials
AssigneeDow Corning Corporation
InventorsDale Earl Hauenstein, Caibao Qian, David Joseph Romenesko
Life of this patent
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Abstract
There is disclosed a polyolefin composition which can be extruded at relatively high rates to provide extrudate having improved hydrophobicity, said composition comprising (A) 100 parts by weight of a polythylene resin; and (B) 1 to 5 parts by weight of an interactive diorganopolysiloxane process aid, said diorganopolysiloxane having a number average molecular weight of at least 10,000. In particularly preferred embodiments, an interactive diorganopolysiloxane in combination with a low density polyethylene is used as a process aid for linear low density polyethylene.
Claims22
A composition comprising:
- (A) 100 parts by weight of a low density polyethylene resin;
- and
- (B) 1 to 5 parts by weight of an interactive diorganopolysiloxane having a number average molecular weight of at least 40,000 wherein said interactive diorganopolysiloxane has at least one pendant or terminal interactive group selected from the group consisting of hydroxyl groups, amine groups, and vinyl groups.
A composition comprising:
- (A) 100 parts by weight of a linear low density polyethylene resin;
- (B) 1 to 5 parts by weight of an interactive diorganopolysiloxane having a number average molecular weight of at least 10,000 wherein said interactive diorganopolysiloxane has at least one pendant or terminal interactive group selected from the group consisting of hydroxyl groups, amine groups, and vinyl groups;
- and
- (C) 0.01 to 100 parts by weight of a low density polyethylene.
In a method of processing a polyethylene resin in which a process aid is added to the polyethylene resin to facilitate processing thereof, the improvement comprising adding as the process aid 1 to 5 parts by weight of an interactive diorganopolysiloxane having a number average molecular weight of at least 40,000, wherein said interactive diorganopolysiloxane has at least one pendant or terminal interactive group selected from the group consisting of hydroxyl groups, amine groups, and vinyl groups, and processing the resin through a metal die, whereby the resulting polyethylene resin exhibits an improved degree of hydrophobicity relative to the unmodified polyethylene resin.
In a method of processing a thermoplastic resin in which a process aid is added to the thermoplastic resin, the improvement comprising adding a process aid which is a uniform blend of
- (i) an interactive diorganopolysiloxane having a number average molecular weight of at least 40,000 wherein said interactive diorganopolysiloxane has at least one pendant or terminal interactive group selected from the group consisting of hydroxyl groups, amine groups, and vinyl groups,;
- and
- (ii) a linear low density polyethylene to
- (iii) a linear low density polyethylene resin, whereby the resulting processed polyethylene resin is processed through a metal die, and the processed resin exhibits improved hydrophobicity relative to the unmodified thermoplastic resin, and said processed resin has a total of 1 to 5 parts by weight of the interactive diorganopolysiloxane.
Dependencies are inferred from the claim text.