Fluorochemical polyurethanes, providing good laundry air-dry performance
AssigneeMinnesota Mining and Manufacturing Company
InventorsFrans A. Audenaert, Kathy E.M.L.A. Allewaert, Gert Hooftman, Makoto Nagase, Hugo R. Lens
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Abstract
The present invention relates to fluorochemical polyurethane compounds of the formula (I) according to claim 1, a method for their preparation and to compositions comprising that fluorochemical polyurethane compound. The compound and the composition comprising that compound are suitable to impart durable oil- and water-repellency and good laundry air-dry performance to substrates, such as fibers, woven or non-woven fabrics, carpets, leather and paper.
Claims61
A fluorochemical composition derived from the reaction of the following compounds:
- (a) at least one fluorochemical oligomer represented by the formula:
- M.sup.f.sub.m M.sup.h.sub.l -TH
- wherein:
- M.sup.f is an organic residue derived from a fluorochemical monomer and such residues may be the same or different,
- M.sup.h is an organic residue derived from a fluorine-free monomer and such residues may be the same or different,
- m is a number from 2 to 40, inclusive,
- l is a number from 0 to 20, inclusive,
- T is an organic linking group obtained by removing a hydrogen atom from a chain transfer agent that contains only two functional groups selected from the group consisting of hydroxy, amino and mercapto functional groups;
- (b) At least one isocyanate represented by the formula:
- A(NCO).sub.x
- wherein:
- A is an organic, di-, tri- or tetravalent residue;
- and
- X is a number from 2 to 4, inclusive;
- (c) at least one bifunctional, active hydrogen compound represented by the formula:
- HX-B-XH
- wherein:
- B is a divalent organic residue, and
- X is O, NH or S;
- and
- (d) at least one isocyanate masking agent.
Dependencies are inferred from the claim text.