Copolymers and oil- and water-repellent compositions...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 220/22 (2006.01) D06M 15/248 (2006.01) D06M 15/263 (2006.01) D06M 15/273 (2006.01) D06M 15/277 (2006.01) D06M 15/347 (2006.01)

Patent

CA 2395621

The present invention is directed to a copolymer capable of forming a water- and oil-repellent agent that enables binding to textiles and other materials without the production of formaldehyde. The copolymer according to the present invention comprises a) a fluoroaliphatic radical-containing agent, (b) stearyl (meth)acrylate; (c) a chlorine-containing compound; and (d) a monomer selected from those that contain an anhydride functional group or are capable of forming an anhydride functional group. The present invention further provides a water and oil repellency-imparting composition for fibrous and other substrates, the composition comprising the above copolymer together with a catalyst, such as sodium hypophosphite, for forming anhydrides from the acid- containing monomers in the copolymer. The composition can further optionally comprise other additives such as, for example, poly(acrylic acid); an extender, a softener; an antioxidant; a surfactant; and/or a plasticizer.

L'invention concerne un copolymère capable de former un agent hydrophobe et oléophobe pouvant se lier à des matières textiles et autres matières sans production de formaldéhyde. Conformément à l'invention, le copolymère est caractérisé en ce qu'il comprend a) un agent contenant un radical fluoroaliphatique, (b) un stéaryl(méth)acrylate ; (c) un composé contenant du chlore ; et (d) un monomère choisi dans le groupe de ceux contenant un groupe fonctionnel anhydride ou capable de former un groupe fonctionnel anhydride. L'invention concerne en outre une composition conférant à des substrats fibreux et autres substrats un caractère oléophobe et hydrophobe, caractérisée en ce qu'elle comprend le copolymère précité, conjointement avec un catalyseur, tel que l'hypophosphite de sodium, pour la formation d'anhydrides à partir des monomères à teneur en acide dans le copolymère. La composition peut également renfermer, facultativement, d'autres additifs tels que, par exemple, un acide poly(acrylique) ; un diluant ; un adoucissant ; un agent tensio-actif ; et/ou un plastifiant.

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