Rohm and Haas Company

Richard E Zdanowski

Thomas W Hutton

Joseph M Owens

John J Miller

John D Guerin

David R Gehman

Frank Thomas Sanderson

This invention is directed to floor polish vehicle compositions which yield floor polishes displaying improved durability. These floor polish vehicle compositions comprise a water insoluble emulsion copolymer containing acid functional monomer residues, transition metal ionic crosslinker, and a basic salt of an alkaline metal.

Floor polish composition having improved durability

Novel polyacrylic hot melt adhesives prepared by blending a polymer having a Tg of -85.degree. to 0.degree. C. with a polymer having a Tg of 20.degree. to 150.degree. C. are disclosed.

Method of utilizing polyacrylic hot-melt adhesives

This invention relates to a latex of internally plasticized polymer particles, low in viscosity although high in hydrophilic components and film forming at temperatures below the calculated Tg of the polymer. The polymer may be prepared by a multistage emulsion polymerization process. The first stage is highly water-swellable or water-soluble. The principal second or later stage is less hydrophilic and of higher Tg than the first stage and is polymerized in the emulsion in the presence of the first stage.

Internally plasticized polymer latex

In manufacturing industrial products such as automobiles, it is known to adhere rigid solid objects such as emblems, the manufacturer's name, body trim, and so forth to the automobile body by means of a relatively thick sheet of resilient foamed plastic such as polyurethane, for example, 30 one thousands of an inch (30 mils) in thickness, coated on each face with a pressure sensitive adhesive. This provides a cushioning effect to take care of the wide variations in the uniformity of the emblems and further provides a cushion so that when the emblem is struck a blow it does not pop off as would be the case with a thin adhesive layer absent the foam layer. The present invention, by providing a permanently pressure sensitive adhesive composition as a thick, backing-free sheet with the resilience of a soft rubber and certain critical characteristics as to the physical nature of the adhesive, makes it possible to completely eliminate the foam sheet and yet have a thick cushioning material which will permanently adhere the rigid body to the automobile or other surface. Specifically, the adhesive when cured retains its pressure sensitive characteristics, has the resiliency of a soft rubber, a thickness of 8 mils, and certain other critical physical characteristics relating to tensile strength, glass transition temperature, and elongation.

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Fort Washington, PA, United States of America

Richard E Zdanowski