Photodegradation-resistant electrodepositable primer composition

Details Photodegradation-resistant electrodepositable primer composition Photodegradation-resistant electrodepositable primer composition

1993-06-23

1995-02-14

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041814, 4274071, 427409, C25D 1310

Patent

active

053892194

ABSTRACT:
Electrodepositable primer compositions comprising an aqueous dispersion of an ionic epoxy-based resin, a hindered amine light stabilizer and an antioxidant mixture which comprises a phenolic antioxidant and a sulfur-containing antioxidant. The primer compositions find particular use under topcoats which are permeable to UV radiation which, in the absence of the hindered amine and antioxidant mixture, causes delamination of the topcoat from the primer coat.

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