Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-10-01
1998-06-02
Krass, Frederick
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523415, 525528, 528 45, 528 73, 427386, 204500, 204501, 204502, 204504, 204505, 204506, C08L 6300, C08L 6302
Patent
active
057601070
ABSTRACT:
An electrodepositable composition is provided comprising:
(A) a non-gelled cationic resin which is derived from a polyepoxide and which contains in the resin molecule cationic salt groups and active hydrogen groups selected from aliphatic hydroxyl and primary and secondary amino; and present as a separate component
(B) a fully capped polyisocyanate curing agent containing substantially no free isocyanate groups. The electrodepositable composition contains from about 0.02 to 1.0 milliequivalents phenolic hydroxyl groups per gram of resin solids, and from about 0.1 to 2.0 milliequivalents beta-hydroxy ester groups per gram of resin solids. The composition provides excellent corrosion resistance when electrodeposited over steel substrates, and does not require lead in the formulation nor the use of a conventional chrome rinse for the steel substrate pretreatment before electrodeposition.
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Eswarakrishnan V.
Faucher Philippe
Karabin Richard F.
Kollah Raphael O.
McCollum Gregory J.
Krass Frederick
PPG Industries Inc.
Stachel Kenneth J.
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