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    • 4. 发明申请
    • HEAT-EXPANDABLE REMOVABLE ACRYLIC PRESSURE-SENSITIVE ADHESIVE TAPE OR SHEET
    • 耐热可剥离丙烯酸压敏胶带或薄片
    • US20100215947A1
    • 2010-08-26
    • US12734236
    • 2008-10-14
    • Eiji YamanakaKunio NagasakiAkira HiraoTooru Nakashima
    • Eiji YamanakaKunio NagasakiAkira HiraoTooru Nakashima
    • C09J7/02C09J133/08B32B5/16B32B5/00
    • C09J4/00C09J7/26C09J7/385C09J133/08C09J2205/11C09J2433/00Y10T428/25Y10T428/269Y10T428/2809Y10T428/2891
    • Disclosed is a heat-expandable/peelable acrylic pressure-sensitive adhesive tape or sheet which maintains a high adhesion force but the bonded part can be easily separated/debonded regardless of whether the surface of the adherend is uneven. The heat-expandable/peelable acrylic pressure-sensitive adhesive tape or sheet includes a viscoelastic body containing both bubbles and microparticles, and on at least one side thereof, a pressure-sensitive adhesive layer containing a blowing agent. The heat-expandable/peelable acrylic pressure-sensitive adhesive tape or sheet preferably contains bubbles in an amount of 3 to 30 percent by volume based on the total volume of the viscoelastic body. The viscoelastic body containing both bubbles and microparticles is preferably a layer prepared by polymerization of a polymerizable composition containing a vinyl monomer mixture containing at least one alkyl(meth)acrylate whose alkyl moiety having 2 to 18 carbon atoms as a main component, or partially polymerized prepolymer of the monomer mixture; a photoinitiator; microparticles; a multifunctional (meth)acrylate; and bubbles.
    • 公开了一种保持高粘合力的热可膨胀/可剥离的丙烯酸类压敏粘合带或片材,但是不管被粘物的表面是不均匀的,接合部分可以容易地分离/脱粘。 热膨胀性剥离性丙烯酸类粘合带或片材包括含有气泡和微粒的粘弹性体,至少在其一面上含有发泡剂的粘合剂层。 热膨胀性剥离性丙烯酸类粘合带或片材优选含有相对于粘弹性体的总体积为3〜30体积%的气泡。 含有气泡和微粒的粘弹性体优选是通过聚合包含含有至少一种具有2至18个碳原子的烷基部分(甲基)丙烯酸烷基酯作为主要成分的乙烯基单体混合物的聚合性组合物而制备的层,或部分聚合的 单体混合物的预聚物; 光引发剂; 微粒; 多官能(甲基)丙烯酸酯; 和气泡。
    • 7. 发明申请
    • PRESSURE-SENSITIVE ADHESIVE TAPE OR SHEET
    • 压敏胶带或薄片
    • US20120121900A1
    • 2012-05-17
    • US13295463
    • 2011-11-14
    • Masahito NIWATooru Nakashima
    • Masahito NIWATooru Nakashima
    • C09J7/02
    • C09J7/26C08K7/00C08K7/28C09J7/385C09J2201/606C09J2205/102C09J2205/106C09J2205/11C09J2433/00Y10T428/2891
    • The present invention relates to a pressure-sensitive adhesive tape or sheet comprising: a viscoelastic layer containing bubbles and/or fine particles; and a pressure-sensitive adhesive layer formed on at least one side of the viscoelastic layer and formed from a pressure-sensitive adhesive composition comprising a monomer mixture comprising the following (a1), (a2) and (a3) or partially polymerized product thereof, and thermal-expandable fine particles: (a1) alkyl (meth)acrylate monomer having 4 to 12 carbon atoms in its alkyl moiety and having a glass transition temperature when formed into a homopolymer of lower than 0° C.; (a2) monomer having at least one nitrogen atom and one ethylenically unsaturated bond in its molecule; and (a3) monomer having one ethylenically unsaturated bond in its molecule and having a glass transition temperature when formed into a homopolymer of 0° C. or higher (excluding (a2) above).
    • 本发明涉及一种压敏粘合带或片,其包含:含有气泡和/或细颗粒的粘弹性层; 以及形成在所述粘弹性层的至少一侧上并由包含以下(a1),(a2)和(a3)或其部分聚合产物的单体混合物的压敏粘合剂组合物形成的压敏粘合剂层, 和热膨胀性微粒:(a1)在其烷基部分具有4〜12个碳原子的(甲基)丙烯酸烷基酯单体,并且在形成低于0℃的均聚物时具有玻璃化转变温度; (a2)在其分子中具有至少一个氮原子和一个烯属不饱和键的单体; 和(a3)在其分子中具有一个烯属不饱和键的单体,并且当形成为0℃或更高(不包括(a2))的均聚物时具有玻璃化转变温度。