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    • 4. 发明公开
    • LIQUID CRYSTALLINE POLYURETHANE ELASTOMER AND METHOD FOR PRODUCING SAME
    • 佛罗里达州维多利亚州维多利亚州
    • EP3085717A4
    • 2016-12-21
    • EP14872013
    • 2014-08-22
    • TOYO TIRE & RUBBER CO
    • HIDAKA YUKI
    • C08G18/65C08G18/10C08G18/32C08G18/48C08G18/76
    • C08G18/10C08G18/3206C08G18/3215C08G18/4812C08G18/4825C08G18/4829C08G18/7621C09K19/3885
    • The purpose of the present invention is to provide a liquid crystalline polyurethane elastomer having a low liquid crystal-developing temperature and can exhibit rubbery elasticity when a liquid crystal is developed therein, and a method for producing the liquid crystalline polyurethane elastomer. The liquid crystalline polyurethane elastomer according to the present invention is characterized by being produced by reacting at least an isocyanate component, a high-molecular-weight polyol component and a mesogenic diol represented by general Formula (1) with one another, and is also characterized by having a crosslinking site that is introduced by a tri-functional or higher isocyanate in the isocyanate component and/or a high-molecular-weight polyol having a number average molecular weight of 400 or more and less than 7000 and having three or more hydroxy groups, in the high-molecular-weight polyol component, wherein the melting point of a mesogenic unit does not exist in a temperature range lying between the glass transition temperature (Tg) and the (liquid crystal phase)-to-(isotropic phase) transition temperature (Ti) of the polyurethane elastomer, and a liquid crystal is developed at a temperature between the Tg and the Ti. (In the Formula, X represents an alkylene group having 3 to 20 carbon atoms; and Y represents a single bond, -N=N-, -CO-, -CO-O- or -CH=N-.)
    • 本发明的目的是提供一种具有低液晶显影温度的液晶聚氨酯弹性体,并且当液晶在其中显影时具有橡胶弹性,以及制备该液晶聚氨酯弹性体的方法。 根据本发明的液晶聚氨酯弹性体的特征在于通过至少使异氰酸酯组分,高分子量多元醇组分和由通式(1)表示的介晶二醇彼此反应而产生,并且还被表征 通过在异氰酸酯组分中具有由三官能以上异氰酸酯引入的交联部位和/或数均分子量为400以上且小于7000的具有3个以上羟基的高分子量多元醇 在高分子量多元醇成分中,介晶单元的熔点在玻璃化转变温度(Tg)和(液晶相)至(各向同性相)之间的温度范围内不存在, 聚氨酯弹性体的转变温度(Ti)和液晶在Tg和Ti之间的温度下显影。 (式中,X表示碳原子数3〜20的亚烷基,Y表示单键,-N = N-,-CO-,-CO-O-或-CH = N-)