# US 5,349,016 A · Fibers of graft copolymers having a propylene polymer material backbone

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- Number: US 5,349,016 A
- Document ID: US5349016A
- Status: Granted
- Kind: A
- Application number: 07/737,952
- Filed: 1991-07-30
- Granted: 1994-09-20
- Earliest claimed: 1991-07-30
- Assignees: Himont Incorporated
- Inventors: Anthony J. DeNicola, Jr.; Rosemary C. Sams
- Web page: https://patentgrep.com/patent/US5349016A

## CPC

- D01F 6/30: comprising olefins as the major constituent
- D01F 6/46: of polyolefins
- Y10T 428/2913: Rod, strand, filament or fiber
- Y10T 428/2915: including textile, cloth or fabric
- 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

Disclosed are fibers comprising a graft copolymer consisting of a propylene polymer material backbone having graft polymerized thereto an ethylenically unsaturated monomer(s) or a blend of at least two of said graft copolymers.

## Claims

### Claim 1

A fiber consisting essentially of a graft copolymer consisting of a propylene polymer material backbone having graft polymerized thereto 20 to 85 parts per hundred part propylene polymer material of at least one ethylenically unsaturated monomer or a blend of at least two of said graft copolymers, wherein either the backbone or monomer(s) or both are different.

### Claim 2 (depends on 1)

The fiber of claim 1, wherein the propylene polymer material backbone is selected from the group consisting of a homopolymer of propylene, a random copolymer of propylene and an alpha-olefin selected from ethylene and C.sub.4 -C.sub.10 alpha-olefins, and a random terpolymer of propylene with two alpha-olefins selected from ethylene and C.sub.4 -C.sub.8 alpha-olefins.

### Claim 3 (depends on 1)

The fiber of claim 1, wherein the ethylenically unsaturated monomer is selected from the group consisting of an aromatic vinyl compound, an acrylic compound and mixtures thereof.

### Claim 4 (depends on 3)

The fiber of claim 3, wherein the vinyl compound is selected from the group consisting of styrene, a C.sub.1 -C.sub.4 linear or branched alkyl or alkoxy ring substituted styrene, mixtures thereof, and mixtures of styrene or said alkyl or alkoxy ring substituted styrene with 5 to 40% of alpha-methylstyrene or alpha-methylstyrene derivatives.

### Claim 5 (depends on 3)

The fiber of claim 3, wherein the acrylic compound is selected from the group consisting of n-butyl acrylate, methyl methacrylate, butyl methacrylate, acrylic acid, methacrylic acid, acrylonitrile and methacrylonitrile.

### Claim 6 (depends on 3)

The fiber of claim 3, wherein said monomers are selected from the group consisting of styrene, methyl methacrylate, a combination of styrene and methyl methacrylate and a combination of styrene and methacrylic acid.

### Claim 7 (depends on 1)

The fiber of claim 1, wherein the monomer is present in an amount of from 20 to 55 pph.

### Claim 8 (depends on 7)

The fiber of claim 7, wherein the graft copolymer is styrene on a polypropylene backbone.

### Claim 9 (depends on 7)

The fiber of claim 7, wherein the graft copolymer is methyl methacrylate on a polypropylene backbone.

### Claim 10 (depends on 7)

The fiber of claim 7, wherein the graft copolymer is styrene and alpha-methylstyrene on a ethylene-propylene random copolymer backbone.

### Claim 11 (depends on 7)

The fiber of claim 7, wherein the graft copolymer is styrene and methyl methacrylate on a polypropylene backbone.

### Claim 12 (depends on 7)

The fiber of claim 7, wherein the graft copolymer is styrene and methacrylic acid on a polypropylene backbone.

### Claim 13 (depends on 1)

The fiber of claim 1, wherein said graft copolymer has been visbroken.

### Claim 14 (depends on 1)

The fiber of claim 1, wherein said graft copolymer is blended with up to 80 pph of a propylene polymer material selected from the group consisting of (i) a homopolymer of propylene, (ii) a random copolymer of propylene and an alpha-olefin selected from the group consisting of ethylene and C.sub.4 -C.sub.10 alpha-olefins and (iii) a random terpolymer of propylene with two alpha-olefins selected from the group consisting of ethylene and C.sub.4 -C.sub.8 alpha-olefins.

### Claim 15 (depends on 1)

The fiber of claim 1, wherein the blend of said graft copolymers comprises two graft copolymers having different ethylenically unsaturated monomers on the backbone.

### Claim 16 (depends on 15)

The fiber of claim 15, wherein the blend of said graft copolymer comprises (a) a graft copolymer of methyl methacrylate on a polypropylene backbone and (b) a graft copolymer of styrene on a polypropylene backbone.

### Claim 17 (depends on 1)

A carpet having a face yarn prepared from the fibers of claim 1.

### Claim 18 (depends on 14)

A carpet having a face yarn prepared from the fibers of claim 14.

### Claim 19 (depends on 1)

A material selected from the group consisting of yarn, woven textile, non-woven textile and geotextile prepared from the fibers of claim 1.

### Claim 20 (depends on 14)

A material selected from the group consisting of yarn, woven textile, non-woven textile and geotextile prepared from the fibers of claim 14.