3M Innovative Properties Company

Kathy E M L A Allewaert

Pierre J Vander Elst

Rudolf J Dams

Frans A Audenaert

The invention provides a method of treating of a substrate by contacting the substrate with a fluorochemical composition that comprises a condensation product of a di- or tri-isocyanate and at least one polyether, the polyether being obtained as the reaction product of a fluorochemical substituted epoxide. Substrates treated in accordance with the invention have good stain release properties, particularly to oil stains or tea stains, so stains can be more easily removed from the treated substrate in a laundering procedure.

Fluorochemical composition containing a condensation product of a fluorochemical polyether and a poly-isocyanate to impart stain release properties to a substrate

A fluorochemical composition is described comprising a polymer derived from a fluorochemical urethane (meth)acrylate monomer. The fluorochemical composition is useful for imparting stain release properties to a substrate.

Fluorochemical composition comprising a polymer derived from a fluorochemical urethane (meth)acrylate monomer for imparting stain release properties to a substrate

The present invention provides a method for preparing a fluorochemical composition comprising a urethane by reacting: (A) fluorochemical oligomer of the formula (I): M,M,&mdash;Q,&mdash;T,wherein M,M,represents a fluorochemical oligomer comprising m units derived from fluorinated monomer and n units derived from fluorine-free monomer and wherein the fluorinated monomers and fluorine-free monomers may be the same or different; m is a value of about 2 to 40; n is a value of about 0 to 20; T,is an &mdash;OH or &mdash;NH,moiety; Q,and T,together represent an organic residue obtained by removing a hydrogen atom from a chain transfer agent that is functionalized with T,; (B) monofunctional compound capable of reacting with an isocyanate and comprising a poly(oxyalkylene) group; (C) isocyanate blocking agent or a fluorine-free oligomer; and (D) isocyanate-reactive compound other than said fluorochemical oligomer, said isocyanate blocking agent, said fluorine-free oligomer and said monofunctional compound; with (E) diisocyanate or a triisocyanate, wherein 33% to 67% of the number of isocyanate groups are reacted with the fluorochemical oligomer according to the formula (I), 33% to 67% of the number of isocyanate groups are reacted with said monofunctional compound, 0 to 33% of the number of isocyanate groups are reacted with an isocyanate blocking agent or a fluorine-free oligomer and 0 to 10% of the number of isocyanate groups are reacted with said isocyanate-reactive compound.

Fluorochemical composition comprising a urethane having a fluorochemical oligomer and a hydrophilic segment to impart stain release properties to a substrate

The present invention provides a method for preparing a fluorochemical composition comprising polyurethane by reacting: (A) fluorochemical oligomer of formula (I): M,M,&mdash;Q,&mdash;T,wherein: M,M,represents flurochemical oligomer comprising m units derived from fluorinated monomer and n units derived from fluorine-free monomer and wherein the fluorinated monomers and fluorine-free monomers may be the same or different; m represents a value of 2 to 40; n represents a value of 0 to 20; T,is &mdash;OH or &mdash;NH,; Q,and T,together represent an organic residue obtained by removing a hydrogen atom from a chain transfer agent that is functionalized with T,; and (B) difunctional compound capable of reacting with an isocyanate and comprising a poly(oxyalkylene) group having 18 to 280 oxyalkylene moieties with (C) diisocyanate or triisocyanate. Substrates treated with the fluorochemical composition prepared according to the method described above, have good stain release properties in particular for oily stains and water based stains such as wine, tea and coffee.

Fluorochemical composition comprising a polyurethane having a fluorochemical oligomer and a hydrophilic segment to impart stain release properties to a substrate

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Haacht, Belgium

Kathy E M L A Allewaert