Stock material or miscellaneous articles – Composite – Of aldehyde or ketone condensation product
Reexamination Certificate
2006-11-28
2006-11-28
Buttner, David J. (Department: 1712)
Stock material or miscellaneous articles
Composite
Of aldehyde or ketone condensation product
C525S443000, C525S509000, C524S091000, C524S094000, C524S104000, C524S106000, C528S248000, C528S252000
Reexamination Certificate
active
07141308
ABSTRACT:
A crosslinking agent that is an ungelled reaction product of (a) at least one aminoplast resin and (b) at least one aromatic heterocycle containing at least one nitrogen atom wherein the crosslinking agent is essentially free of active hydrogen functional groups and has a glass transition temperature of at least 10° C. is disclosed. Methods for preparing crosslinking agents are also disclosed. Further provided is a curable powder coating composition including a polymer having a glass transition temperature of at least 30° C. containing reactive functional groups and the present crosslinking agent; a multilayer composite coating composition and substrates coated therewith are also disclosed.
REFERENCES:
patent: 3957431 (1976-05-01), Pai et al.
patent: 4127382 (1978-11-01), Perry
patent: 4262033 (1981-04-01), Massy et al.
patent: 5621052 (1997-04-01), Szita et al.
patent: 5665852 (1997-09-01), Singh et al.
patent: 6635724 (2003-10-01), Ambrose et al.
patent: 2003/0033961 (2003-02-01), Ambrose et al.
patent: 0 60 980 (1994-07-01), None
Ambrose Ronald R.
Hu Shengkui
Buttner David J.
Meyers Diane R.
PPG Industries Ohio Inc.
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