# US 5,346,726 A · Maleic anhydride/vinyl or allyl ether polymer stain-resists

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- Number: US 5,346,726 A
- Document ID: US5346726A
- Status: Granted
- Kind: A
- Application number: 07/962,156
- Filed: 1992-10-15
- Granted: 1994-09-13
- Earliest claimed: 1990-12-27
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: Engelbert Pechhold
- Web page: https://patentgrep.com/patent/US5346726A

## CPC

- D06M 15/347: of unsaturated ethers, acetals, hemiacetals, ketones or aldehydes
- D06M 15/263: of unsaturated carboxylic acids; Salts or esters thereof
- D06M 2101/34: Polyamides
- D06M: TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS

## Abstract

A polyamide fibrous substrate having deposited on it an amount of a composition effective to impart stain-resistance comprising a water-soluble or water-dispersible maleic anhydride/allyl ether or vinyl ether polymer or a mixture of said polymers, and processes for preparing the substates. The maleic anhydride polymer is used either in hydrolyzed form.

## Claims

### Claim 1

A process for imparting resistance to staining of a polyamide textile substrate by an acid dye which comprises applying to said substrate an effective amount of an aqueous solution or an aqueous dispersion of a composition comprising a water-soluble or water-dispersible hydrolyzed polymer of maleic anhydride and (a) an allyl ether or (b) a vinyl ether or a mixture of the same having a pH of 3 or less, wherein said polymer contains between about 0.7 and 1.3 polymer units derived from one or more allyl or vinyl ether monomers per polymer unit derived from maleic anhydride, and said ether is represented by the formula:
CH.sub.2 .dbd.CH--(CH.sub.2).sub.k --O--(CH.sub.2).sub.m --(A).sub.n --R
wherein
R is hydrogen or an alkyl radical containing 4 to 8 carbon atoms;
A is a divalent radical --SO.sub.2 R.sup.1 -- or --CONR.sup.1 -- in which R.sup.1 is hydrogen or an alkyl radical containing 1 to 6 carbon atoms;
k is 0 or 1;
m is 0 or 2; and
n is 0 or 1.

### Claim 2 (depends on 1)

The process of claim 1 wherein said polymer contains about one polymer unit derived from maleic anhydride per polymer unit derived from one or more allyl ether monomers or vinyl ether monomers.

### Claim 3 (depends on 1)

The process of claim 1 wherein said ether is n-butyl vinyl ether.

### Claim 4 (depends on 1)

The process of claim 1 wherein at least 95 wt % of said polymers have a number average molecular weight of about 700 to 100,000.

### Claim 5 (depends on 1)

The process of claim 1 wherein at least 95 wt % of said polymers have a number average molecular weight of about 1000 to 50,000.

### Claim 6 (depends on 1)

The process of claim 1 wherein up to 90 weight % of said ether is replaced by one or more alpha-olefins or ethylenically unsaturated aromatic compounds.

### Claim 7 (depends on 6)

The process of claim 6 wherein said alpha-olefin is a 1-alkene containing 4 to 18 carbon atoms.

### Claim 8 (depends on 7)

The process of claim 7 wherein said 1-alkene is isobutylene.

### Claim 9 (depends on 8)

The process of claim 8 wherein said alpha-olefin is a diene containing 4 to 18 carbon atoms.

### Claim 10 (depends on 9)

The process of claim 9 wherein said diene is butadiene.

### Claim 11 (depends on 6)

The process of claim 6 wherein said ethylenically unsaturated aromatic compound is styrene.

### Claim 12 (depends on 1)

The process of claim 1 wherein up to 50 weight % of said ether is replaced by one or more of a C.sub.1 to C.sub.4 alkyl acrylate or methacrylate, vinyl acetate, vinyl chloride, vinylidine chloride, vinyl sulfide, N-vinyl pyrrolidone, acrylonitrile, or acrylamide, or mixtures of the same.

### Claim 13 (depends on 1)

The process of claim 1 wherein up to 75 weight % of said maleic anhydride is replaced by maleimide, N-alkyl(C.sub.1-4) maleimides, N-phenylmaleimide, fumaric acid, itaconic acid, citraconic acid, aconitic acid, crotonic acid, cinnamic acid, alkyl(C.sub.1-18) or cycloalkyl(C.sub.3-8) esters of the foregoing acids or sulfated castor oil.

### Claim 14 (depends on 1)

The process of claim 1 wherein up to 30 weight % of the maleic anhydride is replaced by acrylic or methacrylic acid.