Stable solutions of N-substituted aminopolysiloxanes, their preparation and use

A stable solution comprising:

• at least one lower alcohol;
• at least one stabilizer;
• and
• at least one hydrosalt of an organic acid with a N-substituted aminopolysiloxane of formula (I)
• wherein
• each R is independently benzyl or vinylbenzyl,
• each Y is independently alkoxy, hydroxyl or O1/2,
• A is an organic carboxylic acid,
• a is 0, 1 or 2,
• b is 0 or 1,
• c is greater than or equal to 0.125,
• (a+b) is from 0.125 to 3, and
• x is equal to or greater than 2;
• and
• the at least one hydrosalt of an organic acid with a N-substituted aminopolysiloxane of formula (I) comprises a T structural unit of the formula:
• wherein
• R′ is [Ra-NH(2-a)(CH2)2NH(1-b)Rb—(CH2)3-] or is of formula (II), with the proviso that at least one of the R′ groups is of formula (II):
• wherein
• z≧1,
• a is 0, 1 or 2, and
• b is 0 or 1;
• a % by weight of chloride based on the total weight of the solution is less than 1%, and
• the at least one stabilizer is selected from the group consisting of 3,5-di-tert-butylcatechol, 2,5-di-tert-butylhydroquinone, 4-tert-butylpyrocatechol, 2,4-di-tert-butylphenol, hydroquinone monomethyl ether, 2,6-di-tert-butyl-p-cresol and a mixture thereof.