HIGH CHROMA PAINT CONTAINING MULTILAYER INTERFERENCE PLATELETS

摘要

A collection of durable, high chroma, thin film interference platelets (28) are adapted to be added to a liquid medium for producing a predetermined optical response to radiation incident on a surface of a solidified version of the medium. The collection of interference platelets (28) are produced by forming a multilayer interference thin film structure on a flexible web material and separating the multilayer interference thin film structure from the web to provide a collection of interference platelets (28). Interference platelets (28) consist of a metal reflecting layer having first and second surfaces and a multilayer interference thin film structure disposed on at least one of the surfaces of the metal reflecting layer. Layers of the multilayer interference thin film structure lie in parallel planes and have as aspect ratio of at least 2:1, respectively, for surfaces parallel to the planes of layers, and for surfaces perpendicular to the planes of the layers. The interference platelets (28) have a maximum dimension, on any surface, from about 2-200 microns. The high chroma paint (26) can be applied to a susbtrate (21) having a surface (22) coated with a primer layer (23) to improve adhesion between the high chroma paint (26) and the substrate (21). The high chroma paint (26) consists of a polymeric paint vehicle (27) having dispersed therein interference platelets (28).