Maureen B. NUNN,Katherine Sue RICE,Debra A. KLINE,Ian A. TOMLINSON
申请号：
MX2017002078
公开号：
MX368370B
申请日:
2015.08.19
申请国别(地区):
MX
年份:
2019
代理人:
摘要：
A method for forming a dispersible nonwoven substrate in an aqueous medium comprising, consisting of, or consisting essentially of contacting a fibrous substrate with an aqueous nonwoven binder comprising an emulsion polymer having a polydispersity index of at least 10, a weight average molecular weight of less than 1,000,000 and from 8 weight percent to 22 weight percent acid monomer, based on the weight of the emulsion polymer, is disclosed. The aqueous nonwoven binder can be prepared by a method comprising the steps of: a) emulsion polymerizing at least one mono-ethylenically unsaturated monomer and at least one acid monomer in an aqueous solution using an initiator wherein the initiator is present in the aqueous solution in an amount in the range of from 0.5 weight percent to 1.5 weight percent, based on the total weight of the monomers, to form the emulsion polymer； and b) neutralizing the emulsion polymer with a neutralizer selected from the group consisting of an amine having a pKb of 4 to 7, an alkali hydroxide, and combinations thereof to form the aqueous nonwoven binder. The dispersible nonwoven substrates can be used to produce dispersible wipes, such as baby wipes, personal care wipes, cleaning wipes, or any other wet nonwoven containing lotion having a pH of below 5 or 6.La presente invención se relaciona con un método para formar un sustrato no tejido dispersable en un medio acuoso que comprende, que consiste de, o que consiste esencialmente de poner en contacto un sustrato fibroso no tejido con un aglomerante acuoso que comprende un polímero en emulsión que tiene un índice de polidispersidad de por lo menos 10, un peso molecular promedio ponderal menor de 1,000,000 y de 8 por ciento en peso a 22 por ciento en peso de monómero ácido, basado en el peso del polímero en emulsión. El aglomerante no tejido acuoso puede prepararse por un método que comprende las etapas de: a) polimerizar en emulsión por lo menos un monómero mono-etilénicamente insaturado y p
