Dyeable polyolefin compositions and dyeing polyolefin compositions
OwnerParesh J. Sheth, Roger R. Kolminventors
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Abstract
Disperse dyeable compositions of ethylene alkylacrylate grafted onto polyolefin (isotactic polypropylene) are provided. A process for disperse dyeing polyolefin (isotactic polypropylene) shaped into articles such as fibers is provided. This process comprises (1) extruding the polyolefin with about 2 to 30 percent by weight of a thermoplastic copolymer of ethylene and alkylacrylates having one or four carbons in the alkyl group into fibers, and (2) exposing the fibers to a disperse dye bath containing a disperse dye.
Claims33
A process for dyeing fibers based on a polypropylene comprising:
- (a). forming into a fiber a composition of about 98 to 85 percent by weight of a polypropylene and a selected amount of an ethylene copolymer comprising about 70 to 80 percent by weight ethylene and about 30 to 18 percent by weight of an alkyl acrylate wherein the alkyl has one to four carbon atoms, the amount of ethylene copolymer in the composition selected to provide said alkyl acrylate in an amount between 0.2-2.0% by weight and to provide said ethylene in an amount less than 10% by weight of the sum of the polypropylene and ethylene copolymer;
- (b). exposing the fiber to a disperse dye.
A process for dyeing fibers based on polypropylene comprising:
- (a) combining polypropylene with a selected amount of an ethylene copolymer of about 70 to 80 percent by weight ethylene and about 30 to 18 percent by weight of an alkyl acrylate wherein the alkyl group has one to four carbon atoms, to form a composition, said alkyl acrylate comprising less than 2.0% of the composition;
- (b) extruding the composition into fibers;
- (c). exposing the fibers to a disperse dye bath containing a disperse dye.
A colored polyolefin fiber comprising:
- (a) about 98 to 85 percent by weight of a polypropylene;
- (b) a selected amount of an ethylene copolymer comprising about 70 to 80 percent by weight ethylene and about 30 to 18% by weight of an alkyl acrylate wherein the alkyl acrylate has one to four carbon atoms, sufficient to provide alkyl acrylate in an amount between 0.2%-2.0% by weight, wherein at least a portion of said copolymer is grafted onto said polypropylene;
- and
- (c) an effective amount of a disperse dye diffused therein sufficient to produce a colored fiber.
A polyolefin fiber comprising;
- about 98 to 85 percent by weight of a polypropylene;
- a selected amount of an ethylene copolymer incorporated into the polypropylene to form an alloy said ethylene copolymer comprising about 70 to 85 percent by weight ethylene and about 30 to 18 percent by weight of an alkyl acrylate wherein the alkyl acrylate has one to four carbon atoms, said alkyl acrylate component present in an amount between 0.2-2.0% by weight;
- and an effective amount of a disperse dye diffused through the alloy sufficient to produce a colored composition.
A colored polypropylene fiber comprising:
- (a) about 98 to 85 percent by weight of polypropylene;
- (b) a selected amount of an ethylene copolymer incorporated into the polypropylene, the ethylene copolymer comprising about 70 to 80 percent by weight ethylene and about 24 to 18 percent by weight of methyl acrylate, said methyl acrylate present in an amount between 0.2-2.0% by weight;
- (c) and an effective amount of a disperse dye diffused into the polypropylene to produce a colored fiber.
Dependencies are inferred from the claim text.