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    • 164. 发明申请
    • SILICONE-ACRYLIC COPOLYMER
    • 硅酮丙烯酸共聚物
    • US20140128539A1
    • 2014-05-08
    • US14155452
    • 2014-01-15
    • HENKEL US IP LLC
    • Yuxia Liu
    • C08G77/38C09J183/00C09K3/10C09D183/00
    • C08G77/38C08F283/12C08F299/08C08G77/20C09D183/00C09D183/04C09J183/00C09J183/04C09K3/1018C08F220/10
    • A novel silicone-acrylic copolymer which comprises a covalently bonded silicone polymer with an acrylic polymer through the —Si—O—Si— linkage is described. The silicone-acrylic copolymer is a reaction product of (a) a silicone polymer, (bi) a mixture of acrylic monomers wherein at least one acrylic monomer comprises a silane (meth)acrylic monomer and/or a siloxane (meth)acrylic macromer with a radical initiator to form an acrylic prepolymer or (bii) an acrylic polymer which comprises a silane or a siloxane functional group; and (c) a scrambling catalyst, wherein the ratio of the silicone polymer (a) and the mixture of acrylic monomers (bi) or polymer (bii) is from 50:1 to 1:50. The silicone-acrylic copolymer is useful as an adhesive, sealant, coating, and the like.
    • 描述了通过-Si-O-Si-键包含共价键合的硅氧烷聚合物与丙烯酸聚合物的新的有机硅 - 丙烯酸共聚物。 硅氧烷 - 丙烯酸共聚物是(a)硅氧烷聚合物,(bi)丙烯酸单体的混合物的反应产物,其中至少一种丙烯酸类单体包含硅烷(甲基)丙烯酸单体和/或硅氧烷(甲基)丙烯酸大分子单体与 形成丙烯酸类预聚物的自由基引发剂或(bii)包含硅烷或硅氧烷官能团的丙烯酸类聚合物; 和(c)加扰催化剂,其中硅氧烷聚合物(a)和丙烯酸类单体(bi)或聚合物(bii)的混合物的比例为50:1至1:50。 有机硅丙烯酸共聚物可用作粘合剂,密封剂,涂料等。
    • 169. 发明申请
    • EPDM COMPOSITION
    • EPDM组合物
    • US20130251507A1
    • 2013-09-26
    • US13991259
    • 2011-11-29
    • Takuya YamanakaMasahiro SuzukiTakayuki KatoTakahiro HoshidaMasato TakamatsuShuichi Yasuda
    • Takuya YamanakaMasahiro SuzukiTakayuki KatoTakahiro HoshidaMasato TakamatsuShuichi Yasuda
    • C09K3/10F04B15/00
    • C09K3/1006C08L23/16C08L91/00C09K3/10C09K2200/0642F04B15/00
    • Disclosed is an EPDM composition for molding sealing materials, containing a plasticizer; the plasticizer being a paraffinic oil or naphthenic oil in which the absolute value of the difference between its SP value (solubility parameter; determined by Small's formula) and the SP value of EPDM is 0.3 (cal/cm3)1/2 or less; and the composition being free of an ether ester plasticizer. The EPDM composition for molding sealing materials has the following excellent effects. Because a paraffinic oil or naphthenic oil that is compatible with EPDM and has an absolute value of the difference between its SP value and the SP value of EPDM of 0.3 (cal/cm3)1/2 or less is used as the plasticizer, a peroxide crosslinked product of the EPDM composition does not form defects that cause the starting point of blisters even when it is subjected to extraction by being brought into contact with HFO-1234yf. Accordingly, the peroxide crosslinked product, when used as a sealing material, particularly a compressor sealing material, exhibits excellent blister resistance to a hydrofluoroolefin refrigerant, such as HFO-1234yf.
    • 公开了一种用于模塑包含增塑剂的密封材料的EPDM组合物; 增塑剂是其SP值(溶解度参数;由Small公式测定)与EPDM的SP值之差的绝对值为0.3(cal / cm 3)1/2以下的石蜡油或环烷油; 并且该组合物不含醚酯增塑剂。 用于模制密封材料的EPDM组合物具有以下优异的效果。 由于使用与EPDM相容并且其SP值与EPDM的SP值的绝对值为0.3(cal / cm 3)1/2以下的石蜡油或环烷油作为增塑剂,因此使用过氧化物 EPDM组合物的交联产物即使在通过与HFO-1234yf接触进行萃取时也不会形成引起起泡点的缺陷。 因此,当用作密封材料的过氧化物交联产物,特别是压缩机密封材料时,对HFO-1234yf等氢氟烯烃制冷剂具有优异的耐起泡性。