The invention relates to a latex that may be utilized as a binder for nonwoven
applications to form a permeable sublayer of personal hygiene articles. The latex
is prepared by a process including the steps of (1) polymerizing a monomer mixture
comprising styrene, itaconic acid, surfactant and water soluble free radical initiator
to form a seed; (2) sequentially adding equal increments of a monomer mixture of
styrene, butadiene and acrylic acid to the seed under emulsion polymerization conditions
to form a styrene-butadiene-acrylic acid copolymer; and then (3) neutralizing the
styrene-butadiene-acrylic acid copolymer to a pH of about 4.5 to 7 to form the latex.