Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-01-16
1998-01-20
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510320, 510321, 510340, 510341, 510350, 510351, 510352, 510356, 510357, 510445, 510475, 510507, C11D 337, C11D 312
Patent
active
057101183
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a composition and a process for inhibiting dye transfer between fabrics during washing. More in particular, the present invention relates to detergent compositions comprising N-vinylimidazole N-vinylpyrrolidone copolymers having low average molecular weight
BACKGROUND OF THE INVENTION
One of the most persistent and troublesome problems arising during modern fabric laundering operations is the tendency of some colored fabrics to release dye into the laundering solutions. The dye is then transferred onto other fabrics being washed therewith.
One way of overcoming this problem would be to complex or adsorb the fugitive dyes washed out of dyed fabrics before they have the opportunity to become attached to other articles in the wash.
Polymers have been used within detergent compositions to inhibit dye transfer.
One type of such polymers are N-vinylimidazole homo- and copolymers. Examples of said polymers are described in DE 2 814 287-A relates to detergent compositions comprising 0.1 to 10 wt % water-soluble or water-dispersible N-vinyl imidazole homo- or copolymer in combination with anionic and/or nonionic surfactants and other detergent ingredients. EP 372 291 relates to a process for washing discolouration-sensitive textiles. The wash liquor contains anionic
onionic surfactants and watersoluble polymers e.g. (co)polymers N-vinylimidazole, N-vinyloxazolidone or N-vinylpyrrolidone. EP 327 927 describes a granular detergent additive comprising water-soluble polymeric compounds based on N-vinylpyrrolidone and/or N-vinylimidazole and/or N-vinyloxazolidone and cationic compounds. DE 4027832-A assigned to Henkel discloses electrolyte-free liquid detergent compositions comprising zeolite A, nonionic surfactants and dye transfer inhibiting polymers. The dye transfer inhibiting polymers are homo- and copolymers selected from N-vinylpyrrolidone and/or N-vinylimidazole and/or N-vinyloxazolidone.
These prior art documents describe N-vinyl imidazole copolymers as dye transfer inhibiting polymers having a molecular weight range from 10,000 to 1,000,000. The preferred N-vinylimidazole copolymers that are described have a molecular weight from 20,000 to 200,000.
Unfortunately, the overall detergency performance of detergent compositions formulated with said N-vinylimidazole copolymers are affected by the presence of said polymers. As a consequence, the detergent formulator is faced with a difficult task of providing detergent compositions which have an excellent overall detergent performance.
It has now been found that a selected group of N-vinylimidazole copolymers are very efficient in eliminating transfer of solubilized or suspended dyes while not adversely affecting the overall detergency performance of the detergent composition formulated therewith.
This finding allows to formulate detergent compositions which exhibit excellent cleaning and dye transfer inhibiting properties.
According to another embodiment of this invention a process is also provided for laundering operations involving colored fabrics.
SUMMARY OF THE INVENTION
The present invention relates to detergent compositions comprising a polymer selected from N-vinylimidazole N-vinylpyrrolidone copolymers characterized in that said polymer has an average molecular weight range from 5,000 to 50,000.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to detergent compositions comprising a polymer selected from N-vinylimidazole N-vinylpyrrolidone copolymers characterized in that said polymer has an average molecular weight range from 5,000 to 50,000 more preferably from 8,000 to 30,000, most preferably from 10,000 to 20,000.
It has been surprisingly found that an excellent overall detergency performance of detergent compositions comprising said copolymers can be obtained by selecting a specific average molecular weight range from 5,000 to 50,000; more preferably from 8,000 to 30,000; most preferably from 10,000 to 20,000. The average molecular weight range was determined by light s
REFERENCES:
patent: 5443750 (1995-08-01), Convents et al.
patent: 5451341 (1995-09-01), White
patent: 5466802 (1995-11-01), Panandiker et al.
patent: 5500154 (1996-03-01), Bacon et al.
English translation of DE 28 14 287 (Waldhoff et al.) Oct. 1979.
English translation of EP 0 327 927 Aug. 1989.
English translation of EP 0 372 291 Jun. 1990.
English translation of DE 40 27 832 Mar. 1992.
Busch Alfred
Convents Andre Christian
Leeuwen Petrus Johannes
Hertzog Ardith
Patel K. K.
Rasser J. C.
The Procter & Gamble & Company
Zerby K. W.
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