Method for reducing water uptake in silyl terminated sulfopoly(e

Details Method for reducing water uptake in silyl terminated sulfopoly(e Method for reducing water uptake in silyl terminated sulfopoly(e

1997-09-25

1999-07-27

Niland, Patrick D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524539, 524588, 524589, 524591, 524839, 524840, 528 28, C08J 300, C08K 320, C08L 7500, C08L 8300

Patent

active

059291605

ABSTRACT:
A method of decreasing the water uptake in a sulfopoly(ester-urethane) by preparing said sulfopoly(ester-urethane) from a chain extended sulfopolyester polyol which itself has been prepared in a two-step method, said sulfopoly(ester-urethane) comprising in its backbone at least one non-terminal arylene or alkylene group comprising a pendant sulfonic acid group or salt thereof, said sulfonic acid group or salt thereof having the formula ##STR1## wherein R is a trivalent aliphatic or aromatic group and M is a cation, said sulfonic acid group or salt thereof being bonded directly through said aliphatic or aromatic group to ester groups, the polymer of said sulfo(polyester-urethane) being terminated by at least one hydrolyzable silyl group,
said two-step method for preparing said chain extended sulfopolyester polyol comprising the steps of:

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