G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 5/128 (2006.01) C08G 18/61 (2006.01) C08G 18/71 (2006.01)
Patent
CA 2274541
A retroreflective article (10) has retroreflective elements (12) partially embedded in a binder layer (14) that contains a solid polyurethane. The polyurethane includes soft segments, hard segments, silicon moieties, and urethane moieties. The specific chemical identities and relative amounts of the segments and moieties are sufficient to impart desired high elongation and low modulus to the polymer. The inventive retroreflective article is capable of demonstrating extraordinary laundering durability under industrial wash conditions and tumble and tunnel drying.
Cette invention concerne un article rétroréfléchissant (10) comportant des éléments rétroréfléchissants (12) partiellement noyés dans une couche de liant (14) qui contient un polyuréthanne solide. Ledit polyuréthanne comprend des segments souples, des segments durs, des fractions de silicone et des fractions d'uréthanne. Les identités chimiques spécifiques et les quantités relatives des segments et des fractions sont suffisantes pour conférer au polymère les caractéristiques souhaitées d'allongement élevé et de faible module. Ledit article rétroréfléchissant est susceptible de s'avérer extraordinairement résistant au lavage dans des conditions de lavage industrielles et de séchage en séchoir-tunnel ou en sécheuse à culbutage.
Minnesota Mining And Manufacturing Company
Smart & Biggar
The Minnesota Mining & Manufacturing Company
LandOfFree
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