The B. F. Goodrich Company

John V Standish

William J Kroenke

Anthony M Mazany

Marvin H Lehr

The cohesion, creep resistance and yield strength of pigmented chlorinated polyvinyl chloride resin, polyvinyl chloride resin, or blends thereof is improved by coating the pigment with an amino silane coupling agent prior to blending the resin and the pigment.

Pigmented vinyl chloride polymer or blend thereof having improved

Corrosion of ferrous metal and aluminum surfaces, in particular, is inhibited by a layer of an organic-metallic complex of a polyamine with a (i) metal oxide, or (ii) metallate ion, or (iii) water-soluble metallate salt, in aqueous systems having a pH greater than about 7. The polyamine contains at least four (4) amine groups, two of which are secondary amine groups. The effect of the N atoms stretched over the length of the polyamine produces a 'caging effect'0 which immobilizes the oxide, or metallate ions, thus forming the protective layer. The organic-metallic complex deposited on the metal's surface forms the 'amine-metallic' layer which may be either an 'amine-metal oxide complex' which is a coordination complex, or, an 'amine-metallate complex'. The amine-metallate complex may be either an ionic complex of 'amine.metallate ions', or, a mixture of the polyamine and metallate salt which mixture is not a complex, but in solution, behaves like one, and is therefore referred to as an admixture complex of an 'amine+metallate salt'. The organic-metallic complex may be present in a concentration from about 10 ppm to about 5% by wt in neutral or basic aqueous solution. In the lower range of this conc. up to about 2000 ppm, the complex is useful in aqueous process streams; in the higher range, from 2000 ppm to 5%, for a rinse for phosphated metal parts, in lieu of a conventional chromate rinse.

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Cleveland, OH, United States of America

John V Standish