Bleaching and dyeing; fluid treatment and chemical modification – Cleaning or laundering – Removing formation impurities from artifical fiber
Patent
1997-07-16
1998-12-22
Fries, Kery
Bleaching and dyeing; fluid treatment and chemical modification
Cleaning or laundering
Removing formation impurities from artifical fiber
510299, 510300, 510302, 510305, 510306, 510309, 510320, 510471, 510473, 510517, C11D 3386, C11D 322, C11D 3395
Patent
active
058512357
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 application of PCT IUS96/00646 filed Feb. 6, 1996 and claims foreign priority from United Kingdom 9502914.6 filed Feb. 15, 1995.
FIELD OF THE INVENTION
The present invention relates to detergent composition comprising amylase enzymes and nonionic polysaccharide ethers providing improved stain removal.
BACKGROUND TO THE INVENTION
Amylase enzymes may be incorporated into detergent compositions to improve the removal of starch based stains such as chocolate, barbecue sauce and mustard is well known in the art, for example JP57028197, PCT/US93/06302 and PCT/US93/06877. In addition, EPO application no.: 94870041.4 (state of the art according to Article 54(3), EPC) discloses detergent compositions comprising percarbonate and from 0.1% to 0.6% of amylase at specific ratios to provide improved stain removal. EPO application no.: 94302880.3 (state of the art according to Article 54(3), EPC) discloses detergent compositions comprising from 0.05% to 1.5% of amylase, a polymeric dye transfer inhibitor and a dispersing agent. EPO application no.: 94302878.7 (state of the art according to Article 54(3), EPC) discloses detergent compositions comprising from 0.1% to 0.5% of specific fungal amylase enzymes.
Generally, the starch-based stain removal performance of amylase enzymes is directly related to their concentration in the detergent composition, so that an increase in the amount of amylase enzyme increases the stain removal performance. It has however been observed that under stressed conditions, such as the use of short washing machine cycles, or at low temperatures or in the presence of highly stained substrates, the optimum performance of the amylase enzyme is achieved at a certain level. Increasing the level of amylase enzyme beyond this amount does not result in increased stain removal performance benefits, particularly in the presence of bleach agents, especially percarbonate and at high pH levels.
It has now been found that the starch stain removal performance of an amylase enzyme can be unexpectedly improved under stressed conditions by its use in combination with a nonionic polysaccharide ether.
A further advantage of the present invention is that the starch-based stain removal benefits are observed after the completion of only one wash cycle. This is in contrast to the soil release and/or anti redeposition benefits associated with nonionic polysaccharide ethers which require multicycle application in order for these benefits to be observed.
The use of nonionic polysaccharide ethers as soil release agents have been described in the art. For example U.S. Pat. No. 4,136,038 discloses fabric conditioning compositions containing nonionic cellulose ethers having a molecular weight of 3000 to 10000 and ds of 1.8 to 2.7 as soil release agents. The compositions optionally comprise from 0.05% to 2% of detergency enzymes selected from protease, lipase, amylase and mixtures thereof. The combination of amylase and nonionic cellulose ether is not disclosed or exemplified.
EPO 495 257 discloses a compact detergent composition comprising high activity cellulase. Anti-redeposition agents including anionic and nonionic cellulose derivatives, in particular methyl cellulose, carboxymethylcellulose (CMC) and hydroxyethyl cellulose are disclosed but their dp and ds values are not disclosed. Other enzymes including amylase are disclosed, but the level of amylase is not disclosed or exemplified.
EPO 320 296 discloses fabric softening additives for detergent compositions comprising a water soluble nonionic ethyl hydroxyethyl cellulose having an HLB of 3.3 to 3.8, a dp of 50 to 1200 and a ds of 1.9 to 2.9. Enzymes including amylase are disclosed, but the amount is not disclosed or exemplified.
EPO 213 730 discloses detergent compositions with fabric softening properties comprising a nonionic substituted cellulose ether derivative, having a ds of from 1.9 to 2.9 and dp of 50 to 1200 and an HLB of 3.1 to 3.8 as an anti redeposition agent. Enzymes such as amylase are mentioned, but not the amount. The com
REFERENCES:
patent: 4000093 (1976-12-01), Nicol et al.
patent: 4100094 (1978-07-01), Burns et al.
patent: 4174305 (1979-11-01), Burns et al.
patent: 4532067 (1985-07-01), Padron
patent: 5009800 (1991-04-01), Foster
patent: 5160641 (1992-11-01), Foster
patent: 5691295 (1997-11-01), Maurer et al.
patent: 5707950 (1998-01-01), Kasturi et al.
Baillely Gerard Marcel
Guedira Nour-Eddine
Hall Robin Gibson
Bolam B. M.
Echler, Sr. R. S.
Fries Kery
The Procter & Gamble & Company
Zerby K. W.
LandOfFree
Detergent composition comprising an amylase enzyme and a nonioni does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Detergent composition comprising an amylase enzyme and a nonioni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detergent composition comprising an amylase enzyme and a nonioni will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2041462