Appeal No. 2003-0819
Application No. 09/872,928
R2 is hydrogen or C1-C6alkyl,
R3 is hydrogen,
R4 is hydrogen, C1-C6alkyl or a radical of the formula
IIIa
O
O
R9
H
R2 R10
R11
R7
R16 C R17
R8
(IIIa)
R5 is hydrogen,
R7, R8, R9 and R10 independently of one another are
hydrogen, C1-C4alkyl or C1-C4alkoxy,
R11 is hydrogen, C1-C4alkyl or C1-C4alkoxy, C2-
R 20R 21
O C C O R 23
C8alkanoyloxy or H R 22 , with the
proviso that at least two of the radicals R7, R8, R9,
R10 and R11 are hydrogen;
R16 and R17, together with the C atom to which they are
attached, form an unsubstituted or mono- to tri-C1-
C4alkyl-substituted cyclohexylidene ring,
R20, R21 and R22 are hydrogen, and
R23 is C2-C18alkanoyl, and
c) at least one additive selected from the group
consisting of organic phosphates or phosphonites.
25. A process for reducing the discoloration of
heat-cured powder coating compositions comprising
epoxy resins, polyester-hydroxyalkylamides, polyester-
glycolurils, epoxy-polyester resins, polyester-
triglycidyl isocyanurates, hydroxy-functional
polyester-blocked polyisocyanates, hydroxy-functional
polyester-uretdiones, acrylate resins with hardener or
a mixture of such resins, which comprises
incorporating into or applying to these compositions
before curing
3
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007