Dispersions of fluorinated polymers

Details Dispersions of fluorinated polymers Dispersions of fluorinated polymers

C - Chemistry, Metallurgy

08

G

C08G 18/50 (2006.01) C08G 18/08 (2006.01) C08J 3/03 (2006.01) C09D 175/04 (2006.01) D21H 17/53 (2006.01) D21H 17/57 (2006.01) D21H 19/24 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2391668

Use for the paper sizing of aqueous polyurethane dispersions from (per)fluoropolyethers obtainable by reaction among the following compounds: a) (per)fluoropolyether diols having a number average mole- cular weight from 400 to 5,000; b) diisocyanates having formula: OCN-R-NCO (VIa) wherein R is an aliphatic, cycloaliphatic bifunctional radical; or an aromatic bifunctional radical; c) diols containing one carboxylic function and optionally one or both the following components: d) hydrazine and/or aliphatic diamines; e) monofunctional hydroxylic (per)fluoropolyethers having a number average molecular weight in the range 300-1,000.

Utilisation, pour l'encollage du papier, de dispersions aqueuses de polyuréthane obtenues à partir de (per)fluoropolyéthers, lesquels peuvent être générés par réaction entre les composés suivants : a) (per)fluoropolyétherdiols de masse moléculaire moyenne en nombre entre 400 et 5 000; b) diisocyanates de formule OCN-R-NCO (VIa), où R est un radical aliphatique, cycloaliphatique bifonctionnel; ou un radical aromatique bifonctionnel; c) diols comportant au moins une fonction carboxylique et, de manière facultative, un de ces composants ou les deux : d) hydrazine et/ou diamines aliphatiques; e) (per)fluoropolyéthers hydroxyliques monofonctionnels de masse moléculaire moyenne de l'ordre de 300 à 1 000.

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