Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the wordpress-seo domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/html/wp-includes/functions.php on line 6260 Aminoplast Resin Photochromic Coating From PPG - Coatings World

What are you searching for?

Sign in
Patents

Aminoplast Resin Photochromic Coating From PPG

Author Image

By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

Aminoplast Resin Photochromic Coating From PPG
l Patent No. U.S. 6,506,488 B1
PPG Industries has obtained a patent for an article comprising, in combination, a substrate and a cured photochromic aminoplast resin coating on at least one surface of the substrate, the coating being prepared by combining components comprising molecules having at least 2 hydroxyl groups per molecule; aminoplast component comprising molecules having at least two reactive groups per molecule; and a photochromic amount of photochromic component.
This is provided that the components are combined without reacting the components before combining, the cured coating being substantially free of cosmetic defects, the components being used in such proportions to produce a photochromic aminoplast resin coating having a Fischer microhardness of at least 45 to 180 Newtons per mm2 as measured with a Fischerscope H-100 using a 100 milli Newton load, 30 load steps and 0.5 second pauses and exhibiting a ∆OD of at least 0.15 after 30 seconds and at least 0.47 after eight minutes, and a bleach rate of not more than 180 seconds—all as measured in the 85° F photochromic performance test.

Add us as a preferred source on Google

Get the latest Coatings World news, insights and analysis in your Google Search and AI experiences.

Add Coatings World as a preferred source on Google (opens in a new tab)

Keep Up With Our Content. Subscribe To Coatings World Newsletters