Wet retroreflective pavement marking articles

Details Wet retroreflective pavement marking articles Wet retroreflective pavement marking articles

1996-11-26

1998-07-07

Phan, James

Optical: systems and elements

Signal reflector

Including a curved refracting surface

359539, 359540, 404 12, 404 14, G02B 5128

Patent

active

057777918

ABSTRACT:
Retroreflective articles, for example in the form of pavement markers or retroreflective elements, exhibit both wet and dry retroreflectivity by using a plurality of Type A microspheres and a plurality of Type B microspheres partially embedded in a binder layer containing specular pigments. The Type A and Type B microspheres have different average indices of refraction.

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U.S. Ser. application No. 08/503,532, filed Jul. 18, 1995.
ASTMD ASTND 4061-94, "Standard Test Method for Retroreflectance of Horizontal Coatings", Apr. 1994, pp. 461-467.

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