Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2006-03-07
2006-03-07
Niland, Patrick D. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C523S400000, C524S599000, C524S600000, C524S606000, C524S612000, C524S590000, C524S840000, C525S408000, C525S418000, C525S419000, C525S450000, C525S452000
Reexamination Certificate
active
07008995
ABSTRACT:
Carboxy resins of low equivalent weight per carboxyl group are synthesized by reacting a compound having two or more isocyanate groups with a compound having one hydroxyl group and two or more carboxyl groups. In a preferred embodiment, the compound having isocyanate groups is an isocyanurate derivative of a diisocyanate. The compound having isocyanate groups and the compound having one hydroxyl group and two or more carboxyl groups are reacted under conditions where reaction of carboxyl groups with isocyanate is substantially avoided. In another aspect of the invention, coating compositions are provided that contain in addition to the carboxy resin, a second component having a number of functional groups that are reactive with the carboxyl groups on the carboxy resin.
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BASF Corporation, et al., International Search Report PCT/US 02/24162, Jul. 23, 2002.
English Abstract for WO 91/18071 on front page of the International Publication.
BASF Corporation
Niland Patrick D.
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