a b value of u2212 7 0 the experimental procedure was substantially the same as in example 1 excepting for replacement of 26 g of maleic anhydride with 30 g of glutaric anhydride to give 997 g of a modified organopolysiloxane compound having a viscosity of 88 000 centistokes and expressed by the structural formula me 3 si u2014 o u2014 u2014 sime 2 u2014 o u2014 440 u2014 u2014 sime c 3 h 6 nhr 73 u2014 o u2014 9 u2014 sime 3 in which me is a methyl group and r 73 is a carboxypropylcarbonyl group of the formula u2014 co u2014 ch 2 ch 2 ch 2 u2014 co u2014 oh the aqueous emulsion of this modified organopolysiloxane compound had storage stability as good as that in example 1 the results of the organoleptic touch feeling test for softness of the first test piece cloth reported by the three panel members were all good the colorimetric yellowing test of the second test piece cloth gave a b value of u2212 6 9 the experimental procedure was substantially the same as in example 1 excepting for replacement of the starting aminoalkyl group containing organopolysiloxane with the same amount of another aminoalkyl group containing organopolysiloxane having a viscosity of 1850 centistokes and expressed by the structural formula me 3 si u2014 o u2014 u2014 sime 2 u2014 o u2014 475 u2014 u2014 sime c 3 h 6 nh 2.