Ppg Industries, Inc.

Dennis W Carson

David R Wallace

Robert J Schmitt

Carl A Seneker

Thomas A Van Kuren

Harlan B Johnson

Thomas G Krivak

J Douglas Mansell

Laurence E Jones

Ralph C Gray

Glenn W Luckock

Corrosion inhibiting calcium-containing amorphous precipitated silica is described. The silica is prepared by admixing simultaneously in a reactor aqueous alkali metal silicate, e.g., sodium silicate, acidifying agent, e.g., hydrochloric acid, and a water-soluble source of calcium, e.g., calcium chloride. The product contains from 6 to 9 weight percent calcium (as CaO). The silica product may be incorporated into a coating composition used for corrodible metallic surfaces.

Article having a corrosion inhibiting coating

Corrosion inhibiting pigment

A coating composition contains an organic polyol, a polyepoxide, a polyisocyanate crosslinking agent, and a phenolic resin. The composition is flexible, having an elongation of at least 10 percent when cured. This coating composition is particularly suitable as a primer in preparing substrates with a multilayer coating having good flexibility.

Flexible primer composition

Method of providing a substrate with a flexible multilayer coating

A coating composition contains an organic polyol, a polyepoxide, a blocked polyisocyanate crosslinking agent, and a phenolic resin. The coating composition also can be formulated as a two package coating composition with a free polyisocyanate crosslinking agent. The composition is flexible, having an elongation of at least 10 percent when cured. This coating composition is particularly suitable as a primer in preparing substrates with a multilayer coating having good flexibility.

Flexible primer composition and method of providing a substrate with a

Coating compositions based on stable aqueous dispersions of particles of vinylidene fluoride polymer are prepared by bringing into admixture unstabilized particles of vinylidene fluoride polymer, liquid organic active solvent for the vinylidene fluoride polymer, liquid nonsolvent, which may be liquid organic nonsolvent, water or a combination of liquid organic nonsolvent and water, and, if not present in the liquid nonsolvent, water. The mixing is conducted such that the particles of vinylidene fluoride polymer are wetted by the dispersion vehicle, yet the particles are not substantially solubilized by the active solvent.

Stable aqueous dispersions of particles of vinylidene fluoride polymer

Growing community of inventors

Lower Burrell, PA, United States of America

Dennis W Carson