Whitening agents for cellulosic substrates

Patent metadata

Field	Value
Publication number	US-10155868-B2
Application number	US-201615283460-A
Country	US
Kind code	B2
Filing date	Oct 3, 2016
Priority date	Oct 13, 2015
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

The present application relates to novel whitening agents for cellulosic substrates. The whitening agents are comprised of at least two constituents: at least one chromophore constituent and at least one polymeric constituent. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by the polymeric component comprising at least two repeating glycerol units. This disclosure also relates to laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions that comprise such whitening agents.

First claim

What is claimed is:

1. A whitening agent consisting of a nonionic amphiphilic nitrogen-linked polyglycerol having the structure of Formula I:

wherein each R 5 is independently selected from the group consisting of alkyl, oxyalkyl, oxyaryl, sulfonamidoalkyl, sulfonamidoaryl, amidoalkyl, amidodialkyl, amidoaryl, amidodiaryl, halogen, thioalkyl and thioaryl;
wherein the index a is an integer from about 0 to about 4;
wherein D is an aromatic or heteroaromatic group;
wherein R 1 is selected from the group consisting of H, alkyl, aryl, aryl alkyl and [(CH 2 CH 2 O) x (CH 2 C(OR)HCH 2 O) y (CH 2 CH 2 O) z H], wherein R 2 is [(CH 2 CH 2 O) x (CH 2 C(OR)HCH 2 O) y (CH 2 CH 2 O) z H], wherein each R is independently selected from the group consisting of H, (CH 2 CH 2 O) z′ H, and mixtures thereof; wherein groups indicated by indices x, y and z may be arranged in any order; wherein x=0, wherein 1≤y≤5 and at least one y≥2; and wherein independently each z=0 and each z′=0.

2. A whitening agent according to claim 1 , wherein said nonionic amphiphilic nitrogen-linked polyglycerol dye is an azo dye having the structure of Formula II:

wherein the index a is from 0 to 2; wherein each R is independently selected from the group consisting of H, (CH 2 CH 2 O) z′ H, and mixtures thereof; wherein groups indicated by indices x, y and z may be arranged in any order; wherein x=0, wherein 1≤y≤5 and at least one y≥2; and wherein independently each z=0 and each z′=0.

Assignees

• Milliken & Co

Inventors

• Torres Eduardo
• Miracle Gregory Scot

Classifications

• D21H21/30

  Luminescent or fluorescent substances, e.g. for optical bleaching (D21H21/40 takes precedence) · CPC title

• C09B69/109

  containing other specific dyes · CPC title

• C09B69/10

  Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds · CPC title

• C09B69/00

  Dyes not provided for by a single group of this subclass · CPC title

• C09B67/0046

  Mixtures of two or more azo dyes · CPC title