| 摘要 |
A method of regulating the coagulation characteristics of a binding agent aqueous dispersion which comprises adding thereto a compound of the formula <IMAGE> in which R is an unsubstituted or hydroxy substituted alkyl or alkenyl radical, A is -O-CH2-CH2- or -O-CH2-CHOH-CH2-, p is zero or 1, X is <IMAGE> wherein r is an integer and both Rx's are hydrogen or one is a methyl or an ethyl radical and the other is a hydrogen atom, Y and Z are, independently, R-(A)p-, as defined above, or a group as represented by but independent of X, m is zero or an integer 1 to 5, and n is an integer 2 to 6, the compound containing at least one group of the type represented by X, and being in free base, acid addition salt or quaternary ammonium salt form. Such modified binder dispersions are advantageous for the production of non-woven fabrics. The presence of such a compound in a non-woven fibrous web also reduces the migration of a dye, which may also have been incorporated in the web, during the heating stage of the process. |
