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专利名称：Polyisocyanates, a process for their
preparation and their use in stoving lacquers
发明人：Reinhard Halpaap,Wilhelm Dunwald,Holger
Casselmann,Hans Schlegel
申请号：US07/5878申请日：19900921公开号：US05071938A公开日：19911210
摘要：This invention relates to polyisocyanates containing
(i) 0.5 to 15% by weight of structural units incorporated by urea groups andcorresponding to the formula ##STR1## (ii) 5 to 20% by weight of isocyanate groups(calculated as NCO) reversibly blocked with monofunctional blocking agents forisocyanate groups and
(iii) 0 to 30% by weight of chemically incorporated urethane groups (calculated as NH--CO--O) other than urethane groups present in blocked isocyanate groups.
The invention also relates to a process for the preparation of these polyisocyanatesand to their use in combination with organic polyhydroxyl compounds as stovingcompositions or for the preparation of stoving compositions for heat resistantsubstrates, in particular wire.
申请人：BAYER AKTIENGESELLSCHAFT
代理人：Joseph C. Gil,Thomas W. Roy
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