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
Patent
active
057101191
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.
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 prior art documents such as DE 2 814 287-A which 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 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.
It has now been found that the N-vinylimidazole N-vinylpyrrolidone copolymers are very efficient in eliminating transfer of solubilized or suspended dyes while enhancing the detergency performance of specific detergent ingredients 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 in combination with specific detergent ingredients.
DETAILED DESCRIPTION OF THE INVENTION
The present invention comprises as an essential detergent ingredient a polymer selected from the N-vinylimidazole N-vinylpyrrolidone copolymers.
Said N-vinylimidazole N-vinylpyrrolidone have found to enhance the detergency performance of certain detergent ingredients formulated therewith.
The N-vinylimidazole N-vinylpyrrolidone polymers have an average molecular weight range from 5000-1,000,000, preferably from 20 000-200,000.
Highly preferred polymers for use in detergent compositions according to the present invention comprise a polymer selected from N-vinylimidazole N-vinylpyrrolidone copolymers wherein 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
The average molecular weight range was determined by light scattering as described in Barth H. G. and Mays J. W. Chemical Analysis Vol. 113. "Modern Methods of Polymer Characterization. In addition, it has been found that an excellent overall detergency performance of detergent compositions comprising N-vinylimidazole N-vinylpyrrolidone 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 N-vinylimidazole N-vinylpyrrolidone copolymers characterized by havin
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
Hertzog Ardith
Patel K. K.
Rasser J. C.
The Procter & Gamble & Company
Zerby K. W.
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