# US 2014/0194616 A1 · Flame retardant cellulose acetate

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- Number: US 2014/0194616 A1
- Document ID: US20140194616A1
- Status: Published application
- Kind: A1
- Application number: 13/734,171
- Filed: 2013-01-04
- Published: 2014-07-10
- Earliest claimed: 2013-01-04
- Assignees: International Business Machines Corporation
- Applicants: International Business Machines Corporation
- Inventors: Dylan J. Boday; Joseph Kuczynski
- Web page: https://patentgrep.com/patent/US20140194616A1

## CPC

- C09K 21/14: Macromolecular materials
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

Flame retardant cellulose acetate is prepared comprising cellulose acetate flakes and an organophosphate compound bonded to the cellulose acetate flakes. Accordingly, the bonded phosphate-functional group provides the cellulose acetate flakes with pendant phosphate ester functionality. Numerous phosphate derivatives can be envisaged that will accomplish the intended task.

## Claims

### Claim 1

A flame retardant cellulose acetate, comprising:
cellulose acetate flakes; and
an organophosphate compound bonded to the cellulose acetate flakes.

### Claim 2 (depends on 1)

The flame retardant cellulose acetate of claim 1, wherein the organophosphate compound is selected from the group consisting of alkyl phosphates, aryl phosphates, and combinations thereof.

### Claim 3 (depends on 1)

The flame retardant cellulose acetate of claim 1, wherein the organophosphate compound is selected from the group consisting of substituted butyl phosphates, unsubstituted butyl phosphates, substituted phenyl phosphates, unsubstituted phenyl phosphates and combinations thereof.

### Claim 4 (depends on 1)

The flame retardant cellulose acetate of claim 1, wherein the organophosphate compound is diphenyl phosphoryl chloride.

### Claim 5 (depends on 1)

The flame retardant cellulose acetate of claim 1, wherein the organophosphate compound is diphenylphosphinic chloride.

### Claim 6

A method of making a flame retardant cellulose acetate, comprising the steps of:
providing cellulose acetate flakes; and
reacting the cellulose acetate flakes with an organophosphate compound.

### Claim 7 (depends on 6)

The method of claim 6, wherein the organophosphate compound is selected from the group consisting of alkyl phosphates, aryl phosphates, and combinations thereof.

### Claim 8 (depends on 6)

The method of claim 6, wherein the organophosphate compound is selected from the group consisting of substituted butyl phosphates, unsubstituted butyl phosphates, substituted phenyl phosphates, unsubstituted phenyl phosphates and combinations thereof.

### Claim 9 (depends on 6)

The method of claim 6, wherein the organophosphate compound is diphenyl phosphoryl chloride.

### Claim 10 (depends on 6)

The method of claim 6, wherein the organophosphate compound is diphenylphosphinic chloride.