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B. Król, P. Król

Coating materials obtained from polyurethane cationomers modified with functionalized silsequioxanes

Polimery 2010, No 6, 440


DOI: dx.doi.org/10.14314/polimery.2010.440

Summary

The three-stage synthesis of waterborne polyurethane cationomers on the basis of diphenyl methane-4,4'-diisocyanate (MDI), oligo(oxypropylene glycol) and N-methyldiethanolamine [(N-MDEA) used as an additional hydroxylating and chain-elongating reagent] has been presented. Stable dispersions were obtained after the quaternisation, in a further fourth stage, of the introduced N-alkyl groups with formic acid (HCOOH) and then dispergation in water (Table 5). The cationomers obtained in the third stage of the synthesis of urethane-isocyanate prepolymers were modified chemically with silsequioxanes functionalized with -OH groups (Table 6). The chemical structure of the cationomers and their molecular weights were determined using IR, NMR and GPC chromatography (Figs. 6-13, Tables 7-11). The same methods were also applied in determining the properties of the obtained PHIPOSS [equation (VI), Figs. 1-5, Tables 1-4].


Key words: nanocomposites, polyurethane cationomer, functionalized silsequioxane, chemical structure, molecular weight.


e-mail: pkrol@prz.edu.pl


B. Król, P. Król

Coating materials obtained from polyurethane cationomers modified with functionalized silsequioxanes