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    • 39. 发明授权
    • Retroreflective articles having tackified acrylic adhesives for adhesion to curved low surface energy substrates
    • 具有增粘的丙烯酸粘合剂用于粘附到弯曲的低表面能基底的回射制品
    • US06677030B2
    • 2004-01-13
    • US09826989
    • 2001-04-05
    • Bimal V. ThakkarAlbert I. Everaerts
    • Bimal V. ThakkarAlbert I. Everaerts
    • B32B300
    • B32B7/12B32B27/08G02B5/124G02B5/128Y10T156/1031Y10T428/24355Y10T428/24628Y10T428/28Y10T428/2852Y10T428/2878Y10T428/2891Y10T428/31692
    • An article comprising (a) a curved substrate having a surface energy below about 38 dynes/cm2; (b) flexible retroreflective sheeting; and (c) a crosslinked pressure-sensitive adhesive adhering the sheeting to the curved substrate. The adhesive contains sufficient polar monomer and tackifier, and is sufficiently crosslinked, to (i) have a glass transition temperature less than −15° C., (ii) permit the sheeting to remain firmly bonded to a low density polyethylene barrel without buckling when cooled from 49° C. to −1° C., and (iii) provide an adhesive bond to the barrel that exhibits increased energy absorption when tested for impact resistance at 0° C. according to ASTM D4272. The adhesive can be manufactured by partially polymerizing some of the ingredients in a pouch using UV radiation, dispersing the pouch and its contents in the other ingredients using an extruder, extrusion coating the adhesive and then UV crosslinking the coating.
    • 一种制品,其包含(a)具有低于约38达因/厘米2的表面能的弯曲基底; (b)灵活的反光片; 和(c)将片材粘合到弯曲基底上的交联压敏粘合剂。 粘合剂含有足够的极性单体和增粘剂,并且被充分交联,以(i)具有低于-15℃的玻璃化转变温度,(ii)允许片材保持牢固地粘合到低密度聚乙烯桶上而没有屈曲,当 从49℃冷却至-1℃,和(iii)根据ASTM D4272,在0℃下测试耐冲击性时,提供与筒体的粘合剂粘合剂,其表现出增加的能量吸收。 粘合剂可以通过使用紫外线辐射部分地聚合袋中的一些成分来制造,使用挤出机将袋和其内容物分散在其它成分中,挤出涂覆粘合剂,然后UV涂布。