Blocked polyisocyanates

Details Blocked polyisocyanates Blocked polyisocyanates

2006-08-08

2006-08-08

Sergent, Rabon (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C252S182200, C252S182210, C427S385500, C524S839000, C524S840000, C528S045000, C528S049000, C564S032000, C564S047000, C564S057000, C564S058000, C564S061000

Reexamination Certificate

active

07087676

ABSTRACT:
Blocked polyisocyanates and one-component stoving systems containing these blocked polyisocyanates, and the preparation thereof and their use for the preparation of lacquers, paints, adhesives and elastomers, wherein blocked polyisocyanates are prepared by reacting polyisocyanates with secondary amines corresponding to the formulawhereinR1—R4can be identical or different and denote hydrogen, C1–C6-alkyl or cycloalkyl,R5denotes C1–C10-alkyl, C3–C10-cycloalkyl,y denotes a number from 2 to 8, andB representswherein R6–R8can be identical or different and independently of one another denote C1–6-alkyl and/or C3–C6-cycloalkyl, R9denotes hydrogen or C1–6-alkyl or C3–C6-cycloalkyl.

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