Browse Prior Art Database

Coating System

IP.com Disclosure Number: IPCOM000079729D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Geist, T: AUTHOR [+2]

Abstract

Coating systems utilizing a binder of preformed polyesterurethane resin and a polyfunctional isocyanate hardening agent show erratic characteristics. For example, viscosity prior to addition of the hardener, and abrasion and scarring resistance after coating and curing, are not always predictable. Viscosity can be stabilized and lowered, and abrasion and scarring resistance can be increased, by selecting for use in the binder only polyesterurethane resins having low-acid numbers in a range of about 0.5 to 0.0, with a range of 0.1 to 0.0 preferred.

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Coating System

Coating systems utilizing a binder of preformed polyesterurethane resin and a polyfunctional isocyanate hardening agent show erratic characteristics. For example, viscosity prior to addition of the hardener, and abrasion and scarring resistance after coating and curing, are not always predictable. Viscosity can be stabilized and lowered, and abrasion and scarring resistance can be increased, by selecting for use in the binder only polyesterurethane resins having low-acid numbers in a range of about 0.5 to 0.0, with a range of 0.1 to 0.0 preferred.

"Acid number" is defined as the number of milligrams of potassium hydroxide required to neutralize one gram of polymer. Notable examples of polyesterurethane resins useful in these coating systems are taught by U. S. Patent 2,871,218. Coating systems of this type are useful, for example, in the preparation of recording media and other uses and may beneficially include pigments, particles, additives and other polymers.

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