Soil release polymers and laundry detergent compositions containing them

Patent metadata

Field	Value
Publication number	US-11739286-B2
Application number	US-201816755980-A
Country	US
Kind code	B2
Filing date	Nov 15, 2018
Priority date	Nov 17, 2017
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The invention provides a polymer providing soil release properties (also termed a “soil release polymer” or SRP) when incorporated in a laundry detergent composition, the polymer comprising a capped polyoxyalkylene end block connected to a polyester segment; the polyester segment comprising alternating —B1-A-B2— and —R— units; in which B1 and B2 are each independently selected from —OC(O)— and —C(O)O— groups; A is a 2,5-furanylene ring and R is a divalent alkylene radical. The polymer provides good compatibility, stability and cleaning performance when incorporated into a laundry detergent composition, preferably a liquid laundry detergent composition, comprising one or more detersive surfactants.

First claim

The invention claimed is:

1. A laundry detergent composition comprising:
at least one detersive surfactant; and
a soil release polymer comprising:
a capped polyoxyalkylene end block connected to a polyester segment;
wherein the polyester segment comprises alternating —B 1 -A-B 2 — and —R— units, B 1 and B 2 are each independently selected from —OC(O)— and —C(O)O— groups, A is a 2,5-furanylene ring, and R is a divalent alkylene radical.

2. The composition according to claim 1 , wherein the amount of polymer is from 0.1 to 10% by weight based on the total weight of the composition.

3. The composition according to claim 2 , wherein the composition is in the form of a liquid,
wherein at least one detersive surfactant is selected from the group consisting of non-soap anionic surfactants, nonionic surfactants and mixtures thereof, and wherein the amount of detersive surfactant is from 3 to 60% by weight based on the total weight of the composition.

4. The composition according to claim 1 , further comprising from 0.5 to 6% by weight based on the total weight of the composition of one or more anti-redeposition polymers selected from alkoxylated polyethyleneimines.

5. A method of laundering fabric using a composition, the method comprising:
diluting a dose of the composition to obtain a wash liquor; and
washing fabrics with the wash liquor so formed, wherein the composition comprises:
at least one detersive surfactant; and
a soil release polymer comprising:
a capped polyoxyalkylene end block connected to a polyester segment;

wherein the polyester segment comprises alternating —B 1 -A-B 2 — and —R— units, B 1 and B 2 are each independently selected from —OC(O)— and —C(O)O— groups, A is a 2,5-furanylene ring, and R is a divalent alkylene radical.

Assignees

• Conopeo Inc
• Conopco Inc

Inventors

• Green Andrew David
• Parry Alyn James
• Rogers Susanne Henning

Classifications

• C11D2111/12

  Soft surfaces, e.g. textile · CPC title

• C11D3/0036 Primary

  Soil deposition preventing compositions; Antiredeposition agents · CPC title

• C11D3/3715 Primary

  Polyesters or polycarbonates · CPC title

• C11D3/3723

  Polyamines or polyalkyleneimines · CPC title

• C11D11/0017

  Chemistry & Metallurgy · mapped topic