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Thursday, 19 September 2019
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Raw materials & technologies, Raw materials, Coatings additives

Paper presents developments in polyurethane cationomers

Thursday, 5 July 2012

Cationomers are polymers that bear net positive charge on sites located on the main structural backbone, pendant from it or at chain termini. Read here more about the novel developments and fields of applications of cationic polyurethane dispersions (PUDs).

Paper presents developments and uses of cationic polyurethane dispersions / Source: Fotolia

Paper presents developments and uses of cationic polyurethane dispersions / Source: Fotolia

The European Coatings Conference "Polyurethanes for high performance coatings” takes place on 25-26 September 2012 in Berlin, Germany. Robert Lomax from Baxenden, a Chemtura Company, outlines in his presentation the development and uses of cationic polyurethane dispersions. These products can bind to negatively-charged surfaces and vice versa. Consequently, they are useful for coating substrates with isolectric points at pH < 4-5, including glass, hair, wool, silk, leather, and certain papers. They also have an ability to tie-down diffusing species such as anionic dyestuffs and other molecules. This enables them to be used in e.g. receptive coatings for ink-jet printing and conversely, as barrier layers in stain-blocking applications.

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