# US 5,925,442 A · Plexifilament and nonwoven made of alternating ethylene/carbon monoxide copolymer

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,925,442 A
- Document ID: US5925442A
- Status: Granted
- Kind: A
- Application number: 08/931,016
- Filed: 1997-09-15
- Granted: 1999-07-20
- Earliest claimed: 1996-03-08
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: Hyunkook Shin
- Web page: https://patentgrep.com/patent/US5925442A

## CPC

- C08J 9/142: {Compounds containing oxygen but no halogen atom}
- C08J 9/143: {Halogen containing compounds}
- D01D 5/11: Flash-spinning
- D01F 6/30: comprising olefins as the major constituent
- C08J 2373/02: Polyanhydrides
- Y10T 428/24826: Spot bonds connect components
- Y10T 428/2913: Rod, strand, filament or fiber
- Y10T 442/608: Including strand or fiber material which is of specific structural definition
- Y10T 442/681: Spun-bonded nonwoven fabric
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Olefin/carbon monoxide alternating polymers are flash-spun to form plexifilamentary products, pulp products, and foam products from alcohol or halogenated hydrocarbon solvents having 1 to 3 carbon atoms.

## Claims

### Claim 1

A plexifilament consisting essentially of an alternating copolymer of ethylene and carbon monoxide or an alternating copolymer having alternating polymerized units of carbon monoxide and at least two different monomer units one of which is ethylene, and the remainder are selected from the group consisting of propylene, butene, pentene, hexene, heptene, octene, nonene, decene, dodecene, styrene, methyl acrylate, methyl methacrylate, vinyl acetate, undecenoic acid, undecenol, 6-chlorohexene, N-vinylpyrrolidone, and diesters of vinylphosphonic acid in which a majority of the monomer units are ethylene units.

### Claim 2 (depends on 1)

Non-woven fabric made from the plexifilament of claim 1.