Patent ID: 6815411
Filing Date: 2004-11-09
Classification: C08F,C08L,C11D,G16C

Abstract:
A method using Correlation I: S=3.246&it;â€ƒ&it;(t&it;â€ƒ&it;#&it;â€ƒ&it;diSi)-1.880&it;â€ƒ&it;(%&it;â€ƒ&it;Si)-0.9066&it;â€ƒ&it;t&it;â€ƒ&it;#&it;EO+17.70(I)wherein t#diSi is the average total number of the Si(CH3)2O units in the molecule; t#EO is the average total number of the ethyleneoxy CH2CH2O units in the molecule; % Si is the weight percent of all siloxane units in the molecule; and the softness index S is at least about 10; to design novel good performing polyalkyleneoxy silicones for use as fabric softening active in an aqueous fabric softening composition for direct application to fabric, and/or for use in fabric softening methods and/or articles of manufacture comprising said fabric softening compositions, said method comprises the following steps:(a) Choose a desired S value, typically at least about 20; (b) Set a desired average molecular weight, MW, being typically from from about 7,500 to about 140,000; (c) Set a desired % EO (weight % of all ethyleneoxy EO units in the molecule), then derive t#EO (the average total number of ethyleneoxy units in the molecule) with t#EO being typically from about 100 to about 1,800; (d) Choose the type of polyalkyleneoxy polysiloxane selected from polycibyleneoxy polysiloxane or polyethyleneoxy/polypropyleneoxy polysiloxane, then set the desired % Si value; (e) Use the desired values for S, t#EO and % Si to calculate t#diSi (the approximated total average number of dimethylsiloxane SiMe2O units in the molecule), using Correlation I, wherein t#diSi is typically about from about 40 to about 530; (f) Calculate % diSi (weight % of total dimethylsiloxane units) and % triSi (weight % of the cerminal tnrnethylsiloxane units); and (g) Calculate t#inkSi (the average number of the polyalkyleneoxy pendant groups).