Whitening agents for cellulosic substrates

US10526566B2 · kind B2 · utility

Assignee

• The Procter & Gamble Company · US

Inventors

• Eugene Steven Sadlowski · Cincinnati, US
• Mark Robert Sivik · Lancaster, US
• Michael David Cummings · Sharonville, US
• Donna D'Angelo Morrall · Columbus, US
• Kevin Lee Kott · Cincinnati, US
• Keith Homer Baker · Cincinnati, US
• Brian Joseph Loughnane · Sharonville, US
• Michael A. Valenti · Greenville, US
• Laurent D. Keiken · Greenville, US
• Xiayong Michael Hong · Greer, US
• Eduardo Torres · San Diego, US
• Dominick J. Valenti · Moore, US
• Patrick D. Moore · Spartanburg, US
• Leonard J. Starks · Duncan, US

Key dates

• Filing date: Mar 4, 2014
• Grant date: Jan 7, 2020
• Expiry date: Mar 4, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/38645
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to novel whitening agents for cellulosic substrates. The whitening agents are comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by having a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPa0.5. This invention 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.