# US 5,349,038 A · Stainblockers for nylon fibers

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- Number: US 5,349,038 A
- Document ID: US5349038A
- Status: Granted
- Kind: A
- Application number: 08/136,187
- Filed: 1993-10-15
- Granted: 1994-09-20
- Earliest claimed: 1992-06-01
- Assignees: Monsanto Company
- Inventors: Le Moyne W. Plischke; Rupert J. Snooks, Jr.
- Web page: https://patentgrep.com/patent/US5349038A

## CPC

- C08G 8/28: Chemically modified polycondensates
- C08G 8/08: of formaldehyde, e.g. of formaldehyde formed in situ
- D06M 15/412: {sulfonated}
- Y10T 428/23986: With coating, impregnation, or bond
- Y10T 428/23993: Composition of pile or adhesive
- Y10T 428/2969: Polyamide, polyimide or polyester
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Oligomeric condensation products including repeat units of the formula: ##STR1## wherein M.sup.+ is a monovalent metal cation; and wherein a=1 or 2 and R is C(R.sub.f).sub.3, or wherein a=O, 1 or 2 and R is ##STR2## wherein each R.sub.f group is independently selected from the group consisting of Fluorine (F) or a perfluoroalkyl group; and b=0, 1 or 2; and a+b=0, 1 or 2; with the proviso that a+b=1 or 2 for at least about half of said repeat units. The products are useful as stainblockers in nylon carpets.

## Claims

### Claim 1

An oligomer comprising at least 10 mole %, based on the total number of moles of aryl hydroxide units of said oligomer, repeat units of the formula ##STR9## wherein M.sup.+ is a monovalent metal cation; and wherein a=1 or 2 and R is C(R.sub.f).sub.3, with each R.sub.f group being independently selected from the group consisting of Fluorine or a perfluoroalkyl group; or wherein a=0, 1 or 2 and R is ##STR10## wherein each R.sub.f group is independently selected from the group consisting of Fluorine (F) or a perfluoroalkyl group;
b=0, 1 or 2; and
a+b=0, 1 or 2; with the proviso that
a+b=1 or 2 for at least about half of said repeat units in said oligomer.

### Claim 2 (depends on 1)

A stainblocker comprising the oligomer of claim 1.

### Claim 3 (depends on 1)

A nylon carpet fiber including a coating applied thereto, said coating comprising about 0.1% to about 1.0%, based on the weight of said fiber, of the oligomer of claim 1.

### Claim 4

An oligomer comprising at least 10 mole %, based on the total number of moles of aryl hydroxide units in said oligomer, repeat units of the formula: ##STR11## wherein M.sup.+ is a monovalent metal cation, and a=0, 1 or 2; b=0, 1 or 2; and a+b=0, 1 or 2; with the proviso that a+b=1 or 2 for at least about half of the subject units in the oligomer.

### Claim 5 (depends on 4)

The oligomer of claim 4 wherein a+b=1 for about 45% to 55% of said repeat units; a+b=2 for up to 12% of said repeat units; and a+b=0 for about 35% to 40% of said repeat units, based on the total number of said repeat units in said oligomer.

### Claim 6 (depends on 4)

The oligomer of claim 4 further including repeat units of the formula ##STR12## wherein c=0, 1 or 2; d=0, 1 or 2; and c+d=0, 1 or 2.

### Claim 7 (depends on 4)

The oligomer of claim 4 wherein a+b=0 for about 38% of said repeat units; a+b=1 for about 50% of said repeat units; and a+b=2 for about 12% of said repeat units, based on the total number of said repeat units in said oligomer.