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    • 104. 发明授权
    • Triblock polyarylene polyether with polysiloxane segment and
impact-improved blends thereof
    • 具有聚硅氧烷链段的三嵌段聚亚芳基聚醚和其冲击改进的共混物
    • US4871816A
    • 1989-10-03
    • US111317
    • 1987-10-22
    • Virgil PercecPaul P. NicholasDana Garcia
    • Virgil PercecPaul P. NicholasDana Garcia
    • C08F299/00C08G65/40C08G65/48C08G81/00C08L71/00
    • C08G81/00C08F299/00C08G65/40C08G65/4012C08G65/48C08L71/00C08L2205/05
    • Polyarylene polyethers ("PAPE") with vinyl chain ends may be crosslinked to form networks with excellent physical and chemical properties except they tend to be brittle. In particular, a polysulfone ("PSU" made from bisphenol A and dichlorodiphenyl sulfone) with vinylbenzyl chain ends ("di-VB-PSU") is too brittle for many applications where impact resistance is essential. This brittleness is combatted by inserting a thermally stable rubbery poly(dimethylsiloxane) ("PDMS") segment having a number average molecular weight in the range from about 600 to about 5000 connected to di-VB-PSU segments by hydrosilylation in the presence of a Pt catalyst, to form a thermoplastic linear predominantly triblock oligomer with vinylbenzyl chain ends which are thermally crosslinkable. When crosslinked, the network formed has improved impact resistance and toughness, with only a little loss in the upper glass transition temperature if the relative lengths of the PDMS and PAPE are such as to provide the desired degree of phase microincompatibility sufficient to improve toughness. The triblock may be blended with a polymer with which the triblock may be crosslinked upon curing. If the VB-PSU-PDMS-PSU-VB triblock is blended with di-VB-PSU the polyblend may be crosslinked to provide improved toughness.
    • 具有乙烯基链末端的聚亚芳基聚醚(“PAPE”)可以交联以形成具有优异物理和化学性质的网络,除非它们易于脆化。 具体地说,具有乙烯基苄基链端(“di-VB-PSU”)的聚砜(“双酚A和二氯二苯基砜制备的”PSU“)对于耐冲击性至关重要的许多应用来说太脆了。 通过在存在下存在下通过氢化硅烷化插入数均分子量在约600至约5000的数均分子量的热稳定的橡胶状聚(二甲基硅氧烷)(“PDMS”)链段,来抵抗这种脆性。 Pt催化剂,以形成热塑性线性主要是三嵌段低聚物,其具有可热交联的乙烯基苄基链端。 当交联时,所形成的网络具有改进的抗冲击性和韧性,如果PDMS和PAPE的相对长度能够提供足以提高韧性的所需程度的相微相容性,则在上玻璃化转变温度中仅有一点损失。 三嵌段可以与固化时三嵌段可以交联的聚合物共混。 如果将VB-PSU-PDMS-PSU-VB三嵌段与二-VP-PSU混合,则可将该共混物交联以提供改善的韧性。
    • 108. 发明授权
    • Bonding structure for timepieces
    • 钟表的结合结构
    • US4763312A
    • 1988-08-09
    • US132247
    • 1987-12-14
    • Ikuo TokunagaShigemi Sasaki
    • Ikuo TokunagaShigemi Sasaki
    • G04B39/02C03C27/04C08F2/50C08F290/00C08F299/00C08F299/06G04B37/22G04B37/00
    • G04B37/22C08F299/065
    • A bonding structure of a timepiece case such as the glass, bezel, case band, pipe, core and case back. Seams bonded with the bonding agent are both durable and waterproof. The bonding agent includes relative to:(A) 100 parts by weight urethane (met) acrylate having more than one acryloyl group and/or methacryloyl group per molecule;(B) 30 to 200 parts by weight (meta) acrylate having more than one hydroxyl group per molecule;(C) 30 to 200 parts by weight isobornyl (meta) acrylate;(D) 30 to 200 parts by weight pre-tacky resin of the petroleum series and coal series and/or the rosin ester series which are soluble in (meta) acrylate monomer;(E) 5 to 50 parts by weight acrylic acid and/or methacrylic acid; and(F) 0.5 to 15 parts by weight photopolymerization initiator of benzoin or benzyldimethylketal or the like.
    • 钟表盒的接合结构,例如玻璃,表圈,表带,管,芯和表壳背。 与粘合剂粘合的接缝既耐用又防水。 粘合剂包括:(A)每分子具有多于一个丙烯酰基和/或甲基丙烯酰基的100重量份氨基甲酸酯(met)丙烯酸酯; (B)每分子具有多于一个羟基的30〜200重量份(甲基)丙烯酸酯; (C)30〜200重量份(甲基)丙烯酸异冰片酯; (D)30〜200重量份石油系预粘性树脂和可溶于(甲基)丙烯酸酯单体的煤系和/或松香酯系列; (E)5〜50重量份丙烯酸和/或甲基丙烯酸; 和(F)0.5〜15重量份的苯偶姻或苄基二甲基缩酮的光聚合引发剂等。