Retroreflective article containing a polyether polyurethane...

Details Retroreflective article containing a polyether polyurethane... Retroreflective article containing a polyether polyurethane...

G - Physics

02

B

G02B 5/128 (2006.01)

Patent

CA 2204516

A retroreflective article (10) includes retroreflective elements (12) partially embedded in a binder layer (14) that comprises a polyurethane polymer. The polyurethane polymer is a reaction product of (i) a polyether polyol having a number average molecular weight of at least 2,000 and (ii) a polyisocyanate. A retroreflective article that employs a binder layer of this kind demonstrates extraordinary laundering durability under harsh wash conditions.

Un article rétroréflecteur (10) comprend des articles rétroréflecteurs (12) partiellement enfoncés dans une couche de fixation (14) qui est constituée d'un polymère polyuréthane. Le polymère polyuréthane est le produit de réaction (i) d'un polyéther polyol ayant un poids moléculaire moyen d'au moins 2000 et (ii) d'un polyisocyanate. Un article rétroréflecteur qui utilise une couche de fixation de ce type a une excellente résistance au lavage, même dans des conditions de lavage particulièrement agressives.

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