Crosslinking agents for textile printing fixing agents
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United States of America Patent
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Mar 4, 1997
Grant Date -
N/A
app pub date -
Sep 8, 1995
filing date -
Sep 20, 1994
priority date (Note) -
Expired
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Abstract
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).
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