Pulverulent compounds, a process for their preparation

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter

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156330, 1563314, B32B 516, B32B 900, B32B 1502, B32B 1702, B32B 1900, B32B 2102

Patent

active

060634979

ABSTRACT:
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 ##STR1## 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.

REFERENCES:
patent: 4003718 (1977-01-01), Gattuso
patent: 4510288 (1985-04-01), Meyer et al.

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