Ppg Industries Ohio, Inc.

Other

Ppg Industries, Inc.

Andrew R Wolff

Truman F Wilt

David N Walters

Karen D Donnelly

James A Claar

Joseph M Carney

Ali Lange

Savanna J Peake

Sara R Clark

Yasmin Shashova

Compositions and methods of the invention are directed to the removal of solid films, and particularly paint layers, from substrates, and particularly smooth, porous, and/or mineralogically fragile substrates such as sandstone. The compositions include cooked aqueous solutions of starch. The compositions can advantageously remove paints and other unwanted solid films from these and other substrates without damaging the substrate itself.

Removal of paint from porous, smooth, and mineralogically fragile surfaces

Curable compositions containing novel polysiloxanes having various reactive functional groups are disclosed. The curable compositions are useful as both ambient-cured and thermally-cured coating compositions which provide such properties as excellent appearance, mar resistance, acid etch resistance, adhesion, pot life, improved tack time, mar resistance and corrosion resistance.

Curable compositions based on functional polysiloxanes

Functional polysiloxanes and curable coating compositions containing such polysiloxanes are disclosed. The curable compositions are useful in coatings where they provide excellent appearance, pot-life, humidity resistance and improved adhesion to galvanized steel substrates. A method for preparing the functional polysiloxanes is also disclosed.

Acetoacetate functional polysiloxanes

Functional polysiloxanes containing acetoacetate and curable coating compositions containing such polysiloxanes are disclosed. The curable compositions are usefull in coatings where they provide excellent appearance, pot-life, humidity resistance and improved adhesion to galvanized steel substrates. A method for preparing the functional polysiloxanes is also disclosed.

Polysiloxane polyols and curable coating compositions containing such polysiloxane polyols are disclosed. When present as a component in both ambient-cure and thermal-cure coating compositions the polysiloxane polyols provide improved adhesion, pot-life, tack-times, mar resistance, excellent appearance, film hardness and corrosion resistance. A method for preparing such polysiloxane polyols is also disclosed.

Polysiloxane polyols

Compounds represented by the formulae: ##STR1## wherein: (a) each R in the compound is independently 1-phenylethyl, 2-phenylethyl, 2-phenylpropyl, or 1-methyl-1-phenylethyl;

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Lake Villa, IL, United States of America

Andrew R Wolff