Ductile polyelectrolyte macromolecule-complexed zinc phosphate conversion crystal pre-coatings and topcoatings embodying a laminate

Patent · Wed Dec 31 23:00:00 EST 1986

OSTI ID:866221

Sugama, Toshifumi ^[1]; Kukacka, Lawrence E ^[2]; Carciello, Neal R ^[3]

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1. Mastic Beach, NY
2. Port Jefferson, NY
3. Bellport, NY

This invention relates to a precoat, laminate, and method for ductile coatings on steel and non-ferrous metals which comprises applying a zinc phosphating coating solution modified by a solid polyelectrolyte selected from polyacrylic acid (PAA), polymethacrylic acid (PMA), polyitaconic acid (PIA), and poly-L-glutamic acid. The contacting of the resin with the phosphating solution is made for a period of up to 20 hours at about 80.degree. C. The polyelectrolyte or the precoat is present in about 0.5-5.0% by weight of the total precoat composition and after application, the precoat base is dried for up to 5 hours at about 150.degree. C. to desiccate. Also, a laminate may be formed where polyurethane (PU) is applied as an elastomeric topcoating or polyfuran resin is applied as a glassy topcoating. It has been found that the use of PAA at a molecular weight of about 2.times.10.sup.5 gave improved ductility modulus effect.

• Research Organization: ASSOC UNIVERSITIES INC
• DOE Contract Number: AC02-76CH00016
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4659395
• OSTI ID: 866221
• Country of Publication: United States
• Language: English

Related Subjects

/428/148/
10
150
20
5-5
80
acid
acrylic acid
application
applied
applying
base
coating
coatings
composition
comprises
comprises applying
contacting
conversion
conversion crystal
crystal
degree
desiccate
dried
ductile
ductility
effect
elastomeric
embodying
formed
found
furan resin
glassy
hours
improved
laminate
macromolecule-complexed
metals
methacrylic acid
method
modified
modulus
molecular
molecular weight
non-ferrous
non-ferrous metal
paa
period
phosphate
phosphate conversion
phosphating
pia
pma
poly-l-glutamic
polyacrylic
polyacrylic acid
polyelectrolyte
polyfuran
polyitaconic
polyitaconic acid
polymethacrylic
polyurethane
pre-coatings
precoat
relates
resin
selected
solid
solution
steel
times
topcoating
topcoatings
total
weight
zinc
zinc phosphate