US EPA

1589223 

Journal Article 

Biolatex Binders for Paper and Paperboard Applications 

Bloembergen, S; Vanegdom, E; Wildi, R; Mclennan, IJ; Lee, DI; Klass, CP; Van Leeuwen, J 

2010 

Yes 

Journal of Pulp & Paper Science
ISSN: 0826-6220 

36 

3-4 

151-161 

WOS:000291715500013 

Biopolymer nanoparticles form latex dispersions that
consist of crosslinked water-swollen starch nanoparticles. The biobased latex emulsion provides
an alternative binder system to petrochemical-based binders used by coated paper and paperboard
manufacturers. The biolatex binders consist of a re-engineered starch biopolymer that is unique
because its discrete particles are not water soluble, but form a colloid dispersion in water The
swelling characteristics of a typical SB latex and biolatex colloids were studied and compared.
The crosslinked structure and the role of water as a fugitive plasticizer for the biolatex
nanoparticles explain the unique performance both in terms of coater mutability and optical
properties of the coated paper Novel titanium dioxide-biolatex conjugate compositions were
produced by incorporating titanium dioxide particles into the reactive extrusion process used to
prepare biopolymer nanoparticles. Increased whiteness and brightness were observed for paper
coatings containing the titanium dioxide-biolatex conjugate compositions. Nanoparticle tracking
analysis provided evidence for conjugate formation. The spacing created between TiO(2) particles
of biobased nanoparticle-TiO(2) conjugates is believed to be responsible for the enhanced
whiteness and brightness performance.