Crosslinking agents for textile printing fixing agents

The present invention relates to a method for textile printing with aqueous dispersions in which an organic fixing agent is crosslinked with a blocked polyisocyanate having (i) an average molecular weight of about 800 to about 25,000, (ii) a content of blocked isocyanate groups, calculated as free NCO and based on non-blocked polyisocyanate, corresponding to an NCO content of about 5 to about 20% by weight, (iii) an ionic group content of about 1 to about 75 milliequivalents per 100 g of blocked polyisocyanate, and (iv) a content of polyalkylene oxide units of about 1 to about 20% by weight, based on blocked polyisocyanate, said blocked polyisocyanate being obtained by the reaction of (a) organic polyisocyanates, (b) isocyanate-reactive compounds containing (potential) ionic groups, (c) polyalkylene ether alcohols, (d) NCO blocking agents, and (e) optionally, isocyanate-reactive compounds that are different from components (b), (c), and (d).

Water-dispersible blocked isocyanates, method of manufacture, and use thereof

The invention relates to a blocked polyisocyanate having an NCO functionality of from 2.2 to 4.5 and an average molecular weight of 800 to 25,000 and containing (1) blocked isocyanate groups corresponding to an NCO content of 5 to 20 wt. % calculated as free NCO, relative to unblocked polyisocyanate, (2) 1 to 75 meq of ionic groups per 100 g of blocked polyisocyanate, and (3) 3 to 40 wt. % of polyalkylene oxide units relative to the blocked polyisocyanate prepared by the reaction of (a) organic polyisocyanates, (b) NCO-reactive compounds containing ionic or potentially ionic groups, (c) polyalkylene ethers, (d) NCO-blocking agents, and (d) optionally, other NCO-reactive compounds different from components (b), (c) and (d), wherein said process is carried out by either (A) reacting components (a), (b), (c) and, optionally, (e) to form an unblocked polyisocyanate intermediate and then reacting the intermediate with NCO-blocking agent (d) other than an alkali metal bisulfite to form the blocked polyisocyanate, or (B) reacting components (a), (c) and, optionally, (e) with an alkali-metal bisulfite to form the blocked polyisocyanate.

Treatment of polyamide fibres

Ketene dimers of the general formula ##STR1## wherein R 1 and R 2 independently of one another denote an alkyl or alkenyl radical each of which has at least 8 C atoms, a cycloalkyl radical having at least 6 C atoms or an aryl or aralkyl radical are used for the treatment of wool and synthetic polyamide fibres.

Dispersions of copolymers containing perfluoroalkyl groups

Aqueous dispersions of copolymers and graft copolymers of ethylenically unsaturated perfluoroalkyl monomers having at least 6 C atoms in the perfluorinated chain and ethylenically unsaturated monomers containing no perfluoroalkyl groups, which additionally contain certain ester compounds which cannot be used as comono-mers, are outstandingly suitable for finishing textile materials, leather and the like. Excellent oleophobic and hydrophobic effects are obtained.

CARRIER FOR DYING HYDROPHOBIC FIBER MATERIALS.

Carrier for dyeing hydrophobic fibre materials

Verfahren zum Nachbleichen gefärbter Rohcellulose