Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With soil-release – anti-soiling – coating – or nonabrasive...
Patent
1998-11-03
2000-07-11
Gupta, Yogendra
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With soil-release, anti-soiling, coating, or nonabrasive...
510405, 510499, 510504, 510517, 510528, 510302, 510367, 510299, C11D 330, C11D 337, C11D 3395
Patent
active
060873167
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to cotton soil release polymers comprising water soluble and/or dispersible, modified polyamines having functionalized backbone moieties and improved stability toward bleach. The present invention also relates to laundry detergent compositions comprising cotton soil release polymers and to methods for laundering cotton articles.
BACKGROUND OF THE INVENTION
A wide variety of soil release agents for use in domestic and industrial fabric treatment processes such as laundering, fabric drying in hot air clothes dryers, and the like are known in the art. Various soil release agents have been commercialized and are currently used in detergent compositions and fabric softener/antistatic articles and compositions. Such soil release polymers typically comprise an oligomeric or polymeric ester "backbone".
Soil release polymers are generally very effective on polyester or other synthetic fabrics where the grease, oil or similar hydrophobic stains spread out and form a attached film and thereby are not easily removed in an aqueous laundering process. Many soil release polymers have a less dramatic effect on "blended" fabrics, that is on fabrics that comprise a mixture of cotton and synthetic material, and have little or no effect on cotton articles. The reason for the affinity of many soil release agents for synthetic fabric is that the backbone of a polyester soil release polymer typically comprises a mixture of terephthalate residues and ethyleneoxy or propyleneoxy polymeric units; the same or closely analogous to materials that comprise the polyester fibers of synthetic fabric. This similar structure of soil release agents and synthetic fabric produce an intrinsic affinity between these compounds.
Extensive research in this area has yielded significant improvements in the effectiveness of polyester soil release agents yielding materials with enhanced product performance and formulatability. Modifications of the polymer backbone as well as the selection of proper end-capping groups has produced a wide variety of polyester soil release polymers. For example, end-cap modifications, such as the use of sulfoaryl moieties and especially the low cost isethionate-derived end-capping units, have increased the range of solubility and adjunct ingredient compatibility of these polymers without sacrifice of soil release effectiveness. Many polyester soil release polymers can now be formulated into both liquid as well as solid (i.e., granular) detergents.
In contrast to the case of polyester soil release agents, producing an oligomeric or polymeric material that mimics the structure of cotton has not resulted in a cotton soil release polymer. Although cotton and polyester fabric are both comprised of long chain polymeric materials, they are chemically very different. Cotton is comprised of cellulose fibers that consist of anhydroglucose units joined by 1-4 linkages. These glycosidic linkages characterize the cotton cellulose as a polysaccaride whereas polyester soil release polymers are generally a combination of terephthalate and oxyethylene/oxypropylene residues. These differences in composition account for the difference in the fabric properties of cotton versus polyester fabric. Cotton is hydrophilic relative to polyester. Polyester is hydrophobic and attracts oily or greasy dirt and can easily be "dry cleaned". Importantly, the terephthalate and ethyleneoxy/propyleneoxy backbone of polyester fabric does not contain reactive sites, such as the hydroxyl moieties of cotton, that interact with stains in different manner than synthetics. Many cotton stains become "fixed" and can only be resolved by bleaching the fabric.
Until now the development of an effective cotton soil release agent for use in a laundry detergent has been elusive. Attempts by others to apply the paradigm of matching the structure of a soil release polymer with the structure of the fabric, a method successful in the polyester soil release polymer field, has nevertheless yielded marginal results when appl
REFERENCES:
patent: 3897026 (1975-07-01), Kearney
patent: 3912681 (1975-10-01), Dickson
patent: 3948838 (1976-04-01), Hinton et al.
patent: 4235735 (1980-11-01), Marco et al.
patent: 4548744 (1985-10-01), Connor
patent: 4559056 (1985-12-01), Leigh et al.
patent: 4579681 (1986-04-01), Ruppert et al.
patent: 4597898 (1986-07-01), VanderMeer
patent: 4614519 (1986-09-01), Ruppert et al.
patent: 4614611 (1986-09-01), Sprecker
patent: 4877896 (1989-10-01), Maldonado et al.
patent: 4891160 (1990-01-01), VanderMeer
patent: 4976879 (1990-12-01), Maldonado et al.
patent: 5188753 (1993-02-01), Schmidt et al.
patent: 5378468 (1995-01-01), Suffis et al.
patent: 5415807 (1995-05-01), Gosselink
patent: 5565145 (1996-10-01), Watson et al.
patent: 5747440 (1998-05-01), Kellett et al.
Gosselink Eugene Paul
Manohar Sanjeev Krishnadas
Watson Randall Alan
Boyer Charles
Echler, Sr. R. S.
Gupta Yogendra
Rasser J. C.
The Procter & Gamble & Company
LandOfFree
Cotton soil release polymers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cotton soil release polymers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cotton soil release polymers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-542334