Rare earth-preserving fries with a high glass transition temperature and their use for the production of emails with improved heat resistance.

摘要

The present invention is directed to an alkali borosilicate frit which is capable of being applied to a metal substrate by the dry powder electrostatic process at a transfer efficiency of at least 70%, has a glass transition temperature of 525 DEG C and contains, based on the total weight of the frit: TABLE wherein the total weight of CoO plus NiO is at least 1. The present invention is also directed to enamels for self-cleaning ovens containing these frits.