C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 9/02 (2006.01) G02B 1/10 (2006.01) G02B 5/23 (2006.01) G03C 1/685 (2006.01)
Patent
CA 2355128
Described are articles having an aminoplast resin photochromic coating prepared from an aminoplast resin, component(s) having hydroxyl functional groups and photochromic substances. The coatings exhibit a Fischer microhardness of from 45 to 180 Newtons per mm2 and desirable photochromic properties, i.e., the formation of darker activated colors and faster rates of photochromic activation and fade when irradiated with ultraviolet light. Also described are photochromic aminoplast resin articles.
L'invention concerne des articles à revêtement photochromique en résine aminoplaste. Ce type de revêtement est établi à partir d'une résine aminoplaste, d'un ou plusieurs composants ayant des groupes fonctionnels hydroxyle et de substances photochromiques. Il offre une microdureté de Fischer comprise entre 45 et 180 Newtons par mm<2> et les propriétés photochromiques souhaitées, à savoir: formation de couleurs activées plus sombres et taux plus rapides d'activation photochromique et d'affaiblissement photochromique en cas d'illumination par les rayons ultraviolets. L'invention concerne également des articles photochromiques en résine aminoplaste.
Conklin Jeanine A.
O'dwyer James B.
Stewart Kevin J.
Swarup Shanti
Welch Cletus N.
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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