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Formula III 

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Formula IV depicts an amino-functional polymer com› prising a PEI backbone wherein the backbone nitrogens are modified by substitution (i.e. by -(CH$_{2}$ CH$_{2}$ OhH or methyl), quaternized, oxidized to N-oxides or combinations thereof. The resulting polymer has the formula 

Polysciences, with a MW 2000, and 80% hydroxyethylated poly(ethyleneimine) from Aldrich. 

A typical amount of amino-functional polymer to be employed in the composition of the invention is preferably up to 90% by weight, preferably from 0.01 % to 50% active 

Formula IV 

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In the above examples, not all nitrogens of a unit class comprise the same modification. The present invention allows the formulator to have a portion of the secondary amine nitrogens ethoxylated while having other secondary amine nitrogens oxidized to N-oxides. This also applies to the primary amine nitrogens, in that the formulator may choose to modify all or a portion of the primary amine nitrogens with one or more substituents prior to oxidation or quaternization. Any possible combination of R’ groups can be substituted on the primary and secondary amine nitrogens, except for the restrictions described herein above. 

Commercially available amino-functional polymer suit- able for use herein are poly(ethyleneimine) with a MW 1200, hydroxyethylated poly(ethyleneimine) from 

by weight, more preferably from 0.1 % to 20% by weight and most preferably from 0.5% to 15% by weight of the com- position. 

Crystal Growth Inhibitor 

A crystal growth inhibitor (CGI) is an essential compo› nent of the invention. By "crystal growth inhibitor", it is meant a compound that reduces the rate of formation of inorganic microcrystals, thereby reducing the size and/or the amount of such micro-crystals at the fabric surface. 

The suitable CGI for use herein can be defined by the following test procedure, so called crystal growth inhibition test measurement. 

Crystal Growth Inhibition Test Measurement 

The ability for a compound to inhibit crystal growth can be assessed by evaluating the impact in vitro on the growth rate of inorganic micro-crystals. For this purpose, a system 

