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US 2006/0089481 A1Published application
Blocked biuretized isocyanates
OwnerRichard Roesler, Yuliya Berezkin +7inventors
InventorsRichard Roesler, Yuliya Berezkin, Carol Kinney, Kyli Martin, Myron Shaffer, Poli Yu, Dorota Greszta-Franz, Reinhard Halpaap, Joachim Petzoldt
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Abstract
The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is selected from the group consisting of di-C1-C12-alkyl and/or alkoxyalkyl malonates and acetoacetic acid C1-C12-alkyl and/or alkoxyalkyl esters.
Claims7
A blocked biuret group-containing polyisocyanate composition having a blocked isocyanate functionality of at least 4 prepared by a process comprising
- A) reacting a polyisocyanate adduct which
- a) is prepared from an aliphatic and/or cycloaliphatic diisocyanate
- b) has an isocyanate functionality of at least 2.5 and
- c) which contains isocyanurate groups,
- with a biuretizing agent to incorporate biuret groups into said polyisocyanate, and
- B) reacting the biuret-containing polyisocyanate with a blocking agent selected from the group consisting of di-C1-C12-alkyl and/or alkoxyalkyl malonates and acetoacetic acid C1-C12-alkyl and/or alkoxyalkyl esters.
3 more elements
Dependencies are inferred from the claim text.