Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Solid – shaped macroscopic article or structure
Reexamination Certificate
2001-10-26
2003-07-01
Douyon, Lorna M. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Solid, shaped macroscopic article or structure
C510S298000, C510S473000, C510S475000
Reexamination Certificate
active
06586386
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to detergent compositions in the form of tablets for use in fabric washing, and, more particularly, to a composite disintegration blend of defined amounts of a water-soluble salt, a cellulosic material and crosslinked polyvinylpyrrolidone, having a disintegration rate of at least 100 g/min.
2. Description of the Prior Art
Such tablets have the advantage that they do not require the user to measure out a volume of powder or liquid. Instead one or several tablets provide an appropriate quantity of composition for washing a single load in a washing machine or possibly by hand. They are thus easier for the consumer to handle and dispense.
Detergent compositions in tablet form have been described in a number of documents and are sold commercially.
Such tablets generally are made by compressing or compacting a quantity of detergent composition in particulate form. It is desirable that tablets should have adequate mechanical strength when dry before use, yet disintegrate and disperse/dissolve quickly when added to wash water. There is difficulty in achieving both properties simultaneously. As more pressure is used when a tablet is compacted, so the tablet density and strength rise, but there is also a reduction in the speed of disintegration/dissolution when the tablet comes into contact with wash water at the time of use. Organic detergent serves as a binder, but a typical quantity of such detergent can also retard disintegration and dissolution of a tablet.
The prior art has described the numerous difficulties in providing suitable tablets of detergent compositions, including EPA 466485; WO 00/32741; EPA 711827; EPA 838519; WO 99/36493; WO 98/55583; GB 911204; U.S. Pat. No. 3,953,350; JP 60-015500A; EP-A-711827; WO 96/28530; EP 1070741; and EP 1036839.
REFERENCES:
patent: 6329334 (2001-12-01), Bertleff et al.
patent: 2002/0068688 (2002-06-01), Callaghan et al.
patent: 2002/0160930 (2002-10-01), Emmerson et al.
patent: 10002008 (2001-07-01), None
patent: 10002010 (2001-07-01), None
patent: 10005017 (2001-08-01), None
patent: 0170791 (1986-12-01), None
patent: 0522766 (1993-01-01), None
Patel Purvita
Srinivas Bala
Davis William J.
Douyon Lorna M.
ISP Investments Inc.
Katz Walter
Maue Marilyn J.
LandOfFree
Tablet of compacted particulate cleaning composition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tablet of compacted particulate cleaning composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tablet of compacted particulate cleaning composition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3091564