Melt-spun synthetic fiber and process for producing the fiber

Details Melt-spun synthetic fiber and process for producing the fiber Melt-spun synthetic fiber and process for producing the fiber

2008-01-08

2008-01-08

Gray, Jill (Department: 1774)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

C428S375000, C428S391000, C428S394000, C264S211100

Reexamination Certificate

active

07316843

ABSTRACT:
A melt-spun synthetic fiber and process for producing the fiber are described, the fiber including a fiber-forming synthetic polymer and a siloxane-based polyamide with a repeating unit having the formula (I)wherein n is a number in the range of 1-500 inclusive and specifics the number of repeating units of the siloxane-based polyamide, DP is the average degree of polymerization of the siloxane component of the siloxane-based polyamide and is in the range of 1-700 inclusive, X is selected from the group consisting of linear or branched alkylene chains having 1-30 carbon atoms, Y is selected from the group consisting of linear or branched alkylene chains having 1-40 carbon atoms, and each of the R1-R4groups is independently selected from the group consisting of methyl groups, ethyl groups, propyl groups, isopropyl groups, siloxane chains, phenyl groups, and phenyl groups that have been substituted with 1-3 members selected from the group consisting of methyl groups and ethyl groups.

REFERENCES:
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patent: 4052493 (1977-10-01), Etchells
patent: 4091022 (1978-05-01), Etchells
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patent: 5397807 (1995-03-01), Hitchcock et al.
patent: 6362288 (2002-03-01), Brewer et al.
patent: 48053024 (1973-07-01), None
patent: 50111394 (1975-09-01), None
patent: WO 2004/037106 (2004-05-01), None
patent: WO 2004/037926 (2004-05-01), None
JP 73038341 B, 1973, Japan, Toyo Spinning Co.

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