Isotactic propylene copolymer fibers, their preparation and use
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-036/00
C08F-136/00
C08F-210/00
C08F-220/10
C08F-220/68
출원번호
US-0289138
(2002-11-05)
발명자
/ 주소
Stevens, James C.
Vanderlende, Daniel D.
Ethiopia, Samuel
출원인 / 주소
Dow Global Technologies Inc.
대리인 / 주소
Whyte Hirschboeck Dudek SC
인용정보
피인용 횟수 :
41인용 특허 :
113
초록▼
Fibers comprising a propylene homopolymer or a copolymer of propylene and at least one of ethylene and one or more unsaturated comonomers exhibit desirable properties. The homopolymers are characterized as having 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peak
Fibers comprising a propylene homopolymer or a copolymer of propylene and at least one of ethylene and one or more unsaturated comonomers exhibit desirable properties. The homopolymers are characterized as having 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity. The copolymers are characterized as (A) comprising at least about 60 weight percent (wt %) of units derived from propylene, and (B) having at least one of the following properties: (i) 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content of the copolymer is at least about 3 wt %, (iii) a skewness index, Six, greater than about ?1.20, (iv) a DSC curve with a Tme that remains essentially the same and a Tmax that decreases as the amount of comonomer in the copolymer is increased, and (v) an X-ray diffraction pattern that reports more gamma-form crystals than a comparable copolymer prepared with a Ziegler-Natta (Z-N) catalyst.
대표청구항▼
1. A fiber comprising a copolymer of propylene, ethylene and, optionally, one or more unsaturated comonomers, the copolymer characterized as (A) comprising at least about 60 wt % of units derived from propylene, about 0.1-35 wt % of units derived from ethylene, and 0 to about 35 wt % of units derive
1. A fiber comprising a copolymer of propylene, ethylene and, optionally, one or more unsaturated comonomers, the copolymer characterized as (A) comprising at least about 60 wt % of units derived from propylene, about 0.1-35 wt % of units derived from ethylene, and 0 to about 35 wt % of units derived from one or more unsaturated comonomers, with the proviso that the combined weight percent of units derived from ethylene and the unsaturated comonomer does not exceed about 40 wt %, and (B) having at least one of the following properties: (i) 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content of the copolymer is at least about 3 wt %, (iii) a skewness index, Six, greater than about ?1.20, and (iv) a DSC curve with a Tme that remains essentially the same and a Tmax that decreases as the amount of comonomer in the copolymer is increased.2. The fiber of claim 1 in which the copolymer has at least the 13C NMR peaks and B-value properties of (i) and (ii), respectively.3. The fiber of claim 1 blended with other forms of fiber.4. The fiber of claim 1 blended with cotton fibers.5. The fiber of claim 1 blended with polyester fibers.6. A fabric comprising the fiber of claim 1.7. The fabric of claim 6 which is woven.8. The fabric of claim 6 which is nonwoven.9. Carpet, synthetic hair, a feminine hygiene product, a diaper, athletic sportswear, apparel, upholstery, bandages and sterilizable medical apparel and instrument wraps comprising the fiber of claim 1.10. The fiber of claim 1 in which the copolymer is further characterized by an X-ray diffraction pattern that reports more gamma-form crystals than a comparable copolymer prepared with a Ziegler-Natta catalyst.
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이 특허에 인용된 특허 (113)
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