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US 2011/0253152 A1Published application
Polypropylene Based Fibers and Nonwovens
AssigneeExxonMobil Chemical Patents Inc.
InventorsChon Yie LIN, Bryan Robert Chapman, Chia Yung Cheng, William Michael Ferry, Michael Brian Kelly, Bruce Robert Lundmark, Wen Li
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Abstract
The present invention relates to fibers and nonwovens made from plasticized polyolefin compositions comprising a polyolefin, a non-functionalized hydrocarbon plasticizer and a slip agent.
Claims30
-103. (canceled)
A fiber comprising a condrapable polyolefin composition comprising:
- i. 40 to 99.99 wt % of blend of a polypropylene homopolymer and a copolymer, wherein the copolymer has:
- (a) 75-95 wt % of propylene-derived units;
- (b) 5-25 wt % of ethylene-derived units;
- (c) a melting temperature (Tm) of 25° C. to 110° C.;
- (c) a heat of fusion between 1.0 to 50.0 J/g;
- and
- (d) an mm triad tacticity of 75% or greater;
- wherein the wt % is based upon the weight of the copolymer and the NFP, and
- ii. functionalized slip agent;
- and
- iii. a non-functionalized plasticizer (NFP), wherein the NFP is selected from polyalphaolefins comprising oligomers or polymers of C5 to C14 olefins, gas-to-liquid hydrocarbon, Group III mineral oils, or a combination thereof, having (1) a VI of 120 or more, (2) a flash point greater than 200° C., (3) a pour point of −20° C. or less, (4) a specific gravity of less than 0.86,
- wherein ethylene homopolymers and copolymers having a weight average molecular weight of from 500 to 10,000 are substantially absent from the composition.
9 more elements
Dependencies are inferred from the claim text.