US EPA

3859448 

Journal Article 

Modified and functionalized maleimide copolymers for paper coatings 

Ahokas, Mia; Wilen, CE 

2011 

1 

Polymer Bulletin
ISSN: 0170-0839
EISSN: 1436-2449 

66 

4 

491-501 

10.1007/s00289-010-0289-7 

WOS:000287513100004 

New functional aqueous dispersions of poly(styrene-co-maleimide) (SMI) and poly(octadecene-co-maleimide) (OMI) have been prepared by grafting different functional additives into the copolymers side chains to explore the possibility of tailoring the properties of these auxiliary pigments for applications in paper coating formulations. Modifications were carried out by reacting the corresponding maleic anhydride (MA) copolymer with ammonia and small amounts of various functional primary amines such as 4-amino-2,2,6,6,-tetramethylpiperidine (TAD), L(+)-aspartic acid (ASP), 2,2,2-trifluoroethylamine (TFEA) and 2,2, 3,3,4,4,4-heptafluorobutylamine (HFBA) to investigate opportunities to fine-tune weathering stability (TAD), adhesion properties (ASP) or hydrophobicity (TFEA, HFBA) of the coated paper board. The thermal imidazation reaction of MA groups was carried out at 155 degrees C for 6 h in organic solvent-free process using high shear forces. The obtained functional nanoparticles varied in size from 50 to 217 nm and exhibited high glass transition temperatures (T(g)) ranging from 150 to 180 degrees C. Paper board coating trials are also reported in this article. 

Polyimides; Pigments; Paper coating; Surface modification