Investigation of ISP polymers for use on a dye scavenging substrate
Publication Date: 2009-Aug-03
The IP.com Prior Art Database
International Specialty Products: OWNER [+2]
Mixtures of Viviprint 131 / Dow Corning Z-6040 gave improved dye scavenging efficacy.
A dye scavenging substrate can comprise an absorbent substrate impregnated with a dye scavenging compound. This substrate is placed in the washing machine during a wash cycle to adsorb any fugitive dye that may be present due to colour runs from coloured fabrics in the washing load. The system binds the fugitive dye onto the sheet which then becomes coloured itself; thus demonstrating visually to the consumer that it has the desired function. We have tested Viviprint 131 and the cross-linking agent Dow Corning Z-6040 as a system for use in a dye scavenging substrate.
The following were found:
The best method was to pre-mix the polymer and the crosslinker just prior to use in the washing cycle.
DTI test results both visually and instrumentally demonstrated that the best result was observed with a mixture of Viviprint 131 plus Dow Corning Z-6040.
Viviprint 131 / Dow Corning Z-6040 mixture prevents dye deposition onto cotton swatches.
A distinct effect on the colour catching efficacy was observed with addition of crosslinker at rate 1 : 6,86 Viviprint 131 : Z-6040 .
The sheets prepared by ISP are effective in binding dye with Viviprint 131 / Dow Corning Z-6040.
Copolymer of Vinyl Pyrrolidone & DiMethylAminoPropylMethAcrylamide (VP/DMAPMA):
Viviprint 131 is a pseudo-cationic polymer which is substantive to negatively charged surfaces and is compatible with nonionic, cationic and amphoteric surfactants. It forms transparent, flexible glossy films and cross-linkable to give water resistance
Dow Corning Z-6040 does not require hazard labelling at any use concentration in laundry detergents.
Preparation of Sheets:
Several methods were tried for application of the prepared solution to the sheets. These methods were:
a) Dipping the sheet in the polymer solution, immersing in crosslinker solution and then drying.
b) Dipping the sheet in the polymer solution, spraying the crosslinker solution onto the sheet and then drying.
c) Preparing a mixture of polymer and crosslinker solutions just prior to using and immersing the sheet into this sol...