C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/78 (2006.01) C07C 275/62 (2006.01) C08G 18/80 (2006.01)
Patent
CA 2523840
The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is selected from the group consisting of a blocking agent of the formula: (See formula II) wherein R1, R2, R3 may be identical or different and represent a moiety selected from the group consisting of hydrogen, C1-C4-alkyl and C3-C6- cycloalkyl, R4 represents a moiety selected from the group consisting of C1-C4-alkyl, C6-C10-cycloalkyl or C7-C14-aralkyl, and x represents a number of from 1 to 5 , and a blocking agent of the formula: (See formula III) wherein R1, R2, R3 and R4 may be the same or different and represent a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3- C6-cycloalkyl, R5 represents a moiety selected from the group consisting of C1-C10-alkyl and C3-C10-cycloalkyl, and B is a group according to one of the following structural formulas Image wherein each occurrence of R6, R7, and R8 may be the same or different and represent a moiety selected from the group consisting of C1-C6-alkyl and C3-C6-cycloalkyl and R9 is a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl.
Jeffries Michael K.
Martin Kyli
Roesler Richard R.
Shaffer Myron W.
Venham Lanny D.
Bayer Materialscience Llc
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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