Carmine colorants

Patent metadata

Field	Value
Publication number	US-10184024-B2
Application number	US-201313920164-A
Country	US
Kind code	B2
Filing date	Jun 18, 2013
Priority date	Jun 18, 2013
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

The present disclosure provides a modified carmine which can comprise polymers, such as, polyesters, or conjugating molecules, such as, polycarboxylic acids.

First claim

We claim:

1. A compound comprising:
a polymer having a backbone; and
a modified carmine;
wherein the modified carmine comprises at least one carmine moiety and at least one conjugating molecule; and
wherein the modified carmine is (a) an integral part of the polymer backbone; or (b) wherein the modified carmine is covalently attached to a reaction site on the polymer.

2. The compound of claim 1 ,
wherein the carmine moiety and the conjugating molecule are provided in a ratio of carmine moiety:conjugating molecule of from 2:1 to 100:1.

3. The compound of claim 1 ,
the carmine moiety and the conjugating molecule are provided in a ratio of carmine moiety:conjugating molecule of from 1:2 to 1:100.

4. The compound of claim 1 , wherein the polymer is a polyester.

5. The compound of claim 1 , wherein the polymer is a biodegradable polyester.

6. The compound of claim 1 , wherein the modified carmine comprises plural conjugating molecules and plural carmine moieties that form an aggregate or network.

7. The compound of claim 1 , wherein the modified carmine is a conjugate of carmine moiety and a conjugating molecule wherein said conjugating molecule comprises a polycarboxylic acid.

8. The compound of claim 1 , wherein the modified carmine is a conjugate of carmine moiety and a conjugating molecule wherein said conjugating molecule comprises succinic acid.

9. The compound of claim 1 , wherein the modified carmine is a conjugate of carmine moiety and a conjugating molecule wherein said conjugating molecule comprises azelaic acid.

10. The compound of claim 1 , wherein the modified carmine is a conjugate of carmine moiety and a conjugating molecule wherein said conjugating molecule comprises a carboxylic acid.

11. The compound of claim 1 , wherein the modified carmine is a conjugate of carmine and a conjugating molecule comprising plural molecules of a polycarboxylic acid.

12. The compound of claim 11 , wherein said polycarboxylic acid comprises succinic acid.

13. The compound of claim 11 , wherein said polycarboxylic acid comprises azelaic acid.

14. The compound of claim 1 , wherein the modified carmine is a conjugate of carmine moiety and a conjugating molecule comprising plural molecules of a carboxylic acid.

15. The compound of claim 1 , wherein the polymer is a polyester comprising one or more of succinic acid, azelaic acid and isosorbide.

16. The compound of claim 1 , wherein the modified carmine is orange when in a medium of about pH 3,
wherein the modified carmine is red when in a medium of about pH 5.5, or
wherein the modified carmine is purple when in a medium of about pH 7.

Assignees

• Xerox Corp

Inventors

• Farrugia Valerie M
• Birau Maria
• Iftime Gabriel

Classifications

• C08G63/668 Primary

  derived from polycarboxylic acids and polyhydroxy compounds · CPC title

• C08G63/68

  Polyesters containing atoms other than carbon, hydrogen and oxygen (C08G63/64 takes precedence) · CPC title

• C09B69/109

  containing other specific dyes · CPC title

• C09B1/02

  Hydroxy-anthraquinones; Ethers or esters thereof {(C09B1/007 takes precedence)} · CPC title

• C09B61/00 Primary

  Dyes of natural origin prepared from natural sources {, e.g. vegetable sources} · CPC title