Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Reexamination Certificate
2004-10-21
2008-05-13
Sergent, Rabon (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
C564S032000, C564S033000, C564S038000, C252S182200, C252S182210, C528S049000
Reexamination Certificate
active
07371807
ABSTRACT:
The present invention is directed to blocked biuret group-containing polyisocyanate compositions, wherein the blocking agent is of the formula:wherein R1, R2, R3and R4may be the same or different and represent a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl, R5represents 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 formulaswherein each occurrence of R6, R7, and R8may be the same or different and represent a moiety selected from the group consisting of C1-C6-alkyl and C3-C6-cycloalkyl and R9is a moiety selected from the group consisting of hydrogen, C1-C6-alkyl and C3-C6-cycloalkyl.
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Jeffries Michael K.
Martin Kyli
Roesler Richard R.
Shaffer Myron W.
Venham Lanny D.
Bayer MaterialScience LLC
Cheung Noland J.
Gillespie Benjamin
Mrozinski, Jr. John E.
Sergent Rabon
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