| 摘要 |
Pulverulent compounds of outstanding thermal stability and solvent resistance are provided which are based on epoxy resins having more than one 1,2-epoxide group and one or more hydroxyl groups in the resin molecular chain, curing agents and optionally, one or more conventional auxiliaries and additives, wherein the curing agents contain one or more polyisocyanates which are blocked with inert blocking agents and with cyclic amidines of the general formulae I and/or II wherein R is as described herein, at an OH:NCO ratio of from 1 -0.1 to 1:1, the content of cyclic amidine in bound form is from 2 to 9% by mass, based on the epoxy resin employed, and the hardener contains from 0.9 to 0.3 mol of inert blocking agents and from 0.1 to 0.6 mol of cyclic amidines per NCO group, the preparation of these pulverulent compounds and their use as one-component adhesives.
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