Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1997-11-10
1999-07-13
Cameron, Erma
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 82, 528 83, C08C 1828
Patent
active
059228245
ABSTRACT:
A polyurethane prepared from a functionalized polyol has superior hydrolytic stability and dispersive capacity which makes it useful as a binder for magnetic particles in a magnetic recording medium. The functionalized polyol may be one of the group consisting of a polyesterdiol, a polyetherdiol, a polycaprolactone diol and a polycarbonate diol, each of which which incorporates a functional group having the formula: ##STR1## wherein M is a methylene group or nitrogen, R and R.sup.1 are the same or different alkylene groups having from 1 to 7 carbon atoms, R.sup.2 is an alkylene group having from 1 to 7 carbon atoms, and R.sup.3 and R.sup.4 are the same or different alkyl groups having from 1 to 7 carbon atoms, and X is an anion of a Br.o slashed.nsted acid in an amount such that the polyurethane contains from about 8 to about 32 gram moles of the functional group per 1.times.10.sup.6 grams of the polyurethane. The polyurethane may be made by heating a mixture of a Br.o slashed.nsted acid salt of a carboxylic acid terminated aminoester, a stoichiometric excess of a glycol, and a dicarboxylic acid to make a functionalized polyesterdiol and curing a mixture of said polyesterdiol and a diisocyanate.
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Cameron Erma
Didrick Robert M.
Morton International Inc.
White Gerald K.
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