Cyanamide salts of non-lead metals as corrosion inhibitive pigments in mirror back coatings

Patent 4707405 Issued on November 17, 1987. Estimated Expiration Date:

January 2, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3878038

Silver and copper coated articles protected by treatment with mercapto and/or amino substituted thiadiazoles or mercapto substituted triazoles
Patent #: 4357396
Issued on: 11/02/1982
Inventor: Grunewalder , et al.

Gas generating compositions
Patent #: 4386979
Issued on: 06/07/1983
Inventor: Jackson, Jr.

Process for the finishing of fibrous materials: sulfonyl- or carbonyl-cyanamides of dyestuffs
Patent #: 4394129
Issued on: 07/19/1983
Inventor: Springer

Poly(butylene terephthalate) based molding resins Patent #: 4536527
Issued on: 08/20/1985
Inventor: Shearer , et al.

Inventors

Assignee

PPG Industries, Inc.

Application

No. 06/815615 filed on 01/02/1985

US Classes:

428/336, 1 mil or less252/387, Anti-corrosion252/389.1, Component inorganic or organic comprising element other than C,H,O,N,S, and halogen427/402, APPLYING SUPERPOSED DIVERSE COATING OR COATING A COATED BASE427/405, Metal base427/409, Metal base428/433, Alloy or free metal428/457Of metal

Examiners

Primary: Herbert, Thomas J. Jr.

Attorney, Agent or Firm

International Classes

B32B 17/10 (20060101)
B32B 17/06 (20060101)
C03C 17/36 (20060101)
C03C 17/38 (20060101)

Abstract

Compositions of the invention comprise an organic film-forming resin and a cyanamide salt of a non-lead metal. The composition, when applied to a thin metallic film, inhibits degradation of the thin metallic film as compared to the composition without calcium cyanamide. Processes comprising the step of applying a composition of the invention to a thin metallic film and articles comprising a thin metallic film and a layer of a hardened composition of the invention are also disclosed.

Other References

S Pawlikowski et al., Werkstoffe and Korrosion, vol. 10, Jan. 1959, pp. 498-499
Chemisorption and Reactions on Metallic Films 2 (J. Anderson ed. 1971)
Corrosion of Chemically and Vacuum Deposited Silver Films on Glass by Wet Hydrochloric Acid Vapor, 13 Solar Energy Materials 419-432 (Park et al, 1986) at 430