| 摘要 |
<p>An epoxy resin mixture of compounds of the formula wherein Alk represents a defined alkylene group, Ar represents a defined axylene group, each Z independently of the other represents hydrogen or the group derived from the reaction of a hytroxyl group with a monolsocyanate) and 50-500 % of all Zs represent the group . This ~mixture is suitable for the manufacture of flexible moulded articles having a high tear growth resistance. Also disclosed are 5(3)-hydroxypyrazoles having the formula: (I) or (II) wherein: R = H: alkyl with 1-7 carbon atoms, optionally substituted with halogen atoms, CN, and carboalkoxygroups, phenyl optionally substituted; benzyl; alkenyl: or alkynyl: X = halogen: -SR: -OR: -N(R)2; or , where Y is equal to or different from each other, and = H C1-C3 alkyl; halogen, -SR; or -OR; or -N(R)2; and provided further that when in formula I, X = halogen or -N(R)2, the R group, bound to the pyrazolic nitrogen, is different from phenyl.</p> |
