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    • 9. 发明申请
    • ACRYLIC BLOCK COPOLYMER-BASED ASSEMBLY LAYER FOR FLEXIBLE DISPLAYS
    • 用于柔性显示器的基于丙烯酸嵌段共聚物的组装层
    • WO2016196576A1
    • 2016-12-08
    • PCT/US2016/035193
    • 2016-06-01
    • 3M INNOVATIVE PROPERTIES COMPANY
    • ALOSHYNA EP LESUFFLEUR, MarieEVERAERTS, Albert I.ERDOGAN-HAUG, Belma
    • C09J7/00C09J153/00B32B7/12
    • C09J153/00B32B7/06B32B7/12B32B27/08B32B27/18B32B27/22B32B27/308B32B2270/00B32B2307/412B32B2307/542B32B2307/546B32B2307/548B32B2307/71B32B2307/748B32B2457/20B32B2457/206C09J7/10C09J2203/318C09J2205/114C09J2433/00C09J2453/00
    • The present invention is an assembly layer for a flexible device. The assembly layer is derived from precursors including an acrylic block copolymer including (a) at least two A block polymeric units that are the reaction product of a first monomer composition comprising an alkyl methacrylate, an aralkyl methacrylate, an aryl methacrylate, or a combination thereof, wherein each A block has a Tg of at least 50 °C, and wherein the acrylic block copolymer comprises 5 to 50 weight percent A block, and (b) at least one B block polymeric unit that is the reaction product of a second monomer composition comprising an alkyl (meth)acrylate, a heteroalkyl (meth)acrylate, a vinyl ester, or a combination thereof, wherein the B block has a Tg no greater than 10 °C, and wherein the acrylic block copolymer comprises 50 to 95 weight percent B block. Within a temperature range of between -30 °C to 90 °C, the assembly layer has a shear storage modulus at a frequency of 1 rad/sec that does not exceed 2 MPa, a shear creep compliance (J) of at least about 6x10-6 1/Pa measured at 5 seconds with an applied shear stress between 50 kPa and 500 kPa, and a strain recovery of at least 50% at at least one point of applied shear stress within the range of 5 kPa to 500 kPa within 1 minute after removing the applied shear stress. In preferred embodiments the A block polymeric units are of a polymethyl methacrylate and the B block polymeric units are made of poly-n-butyl acrylate.
    • 本发明是用于柔性装置的装配层。 组合层衍生自包括丙烯酸嵌段共聚物的前体,包括(a)至少两个A嵌段聚合物单元,其是包含甲基丙烯酸烷基酯,甲基丙烯酸芳烷基酯,甲基丙烯酸芳基酯或其组合的第一单体组合物的反应产物 其中每个A嵌段具有至少50℃的Tg,并且其中所述丙烯酸嵌段共聚物包含5至50重量%的A嵌段,和(b)至少一个B嵌段聚合单元,其是第二单体 组合物,其包含(甲基)丙烯酸烷基酯,(甲基)丙烯酸杂烷基酯,乙烯基酯或其组合,其中所述B嵌段的Tg不大于10℃,并且其中所述丙烯酸嵌段共聚物包含50至95重量% 百分比B块。 在-30℃至90℃的温度范围内,组装层的剪切储能模量在1弧度/秒的频率下不超过2MPa,剪切蠕变柔量(J)为至少约6×10 6 在5kPa至500kPa范围内的施加的剪切应力的至少一个点处,在5kPa至500kPa的范围内,在5秒下测量的-6 1 / Pa的应变回复率为50kPa至500kPa,应变恢复至少为50% 去除施加的剪切应力后的分钟。 在优选实施方案中,A嵌段聚合物单元为聚甲基丙烯酸甲酯,B嵌段聚合物单元由聚丙烯酸正丁酯制成。