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    • 24. 发明授权
    • Polycarbonate with epoxidized block copolymer
    • 聚碳酸酯树脂组合物
    • US6111016A
    • 2000-08-29
    • US116816
    • 1998-07-17
    • Masahiro KatayamaMasaaki ItoYoshihiro Otsuka
    • Masahiro KatayamaMasaaki ItoYoshihiro Otsuka
    • C08L69/00C08L101/00C08L53/02
    • C08L69/00C08L101/00
    • A thermoplastic resin composition can be obtained by adding about 0.1 to 20 parts by weight of a diene-series block copolymer (2) to 100 parts by weight of a resin composition containing a polycarbonate-series resin (1) as a basic component of which the proportion of terminal hydroxy groups relative to the whole of the terminals is 1 mole % or above (about 5 to 40 mole %). The polycarbonate-series resin base may further comprise a thermoplastic resin composition (3) such as a rubber-modified styrenic resin. The block copolymer component (2) includes an epoxy-modified block copolymer, etc. When added an organophosphorus compound as a flame retardant (4), or a fluorine-containing resin as a flame-retartant auxiliary (5), a halogen-free flame-retardant thermoplastic resin composition can be obtained. A thermoplastic resin with an improved flowability and impact strength can be obtained by modifying a polymer blend of the polycarbonate-series resin and the styrenic-series resin in quality.
    • 通过向100重量份的作为其基本成分的聚碳酸酯系树脂(1)的树脂组合物100重量份中加入约0.1〜20重量份的二烯系嵌段共聚物(2),可以得到热塑性树脂组合物, 末端羟基相对于整个末端的比例为1摩尔%以上(约5〜40摩尔%)。 聚碳酸酯系树脂基材还可以含有热塑性树脂组合物(3),例如橡胶改性苯乙烯树脂。 嵌段共聚物组分(2)包括环氧改性的嵌段共聚物等。当加入作为阻燃剂的有机磷化合物(4)或作为阻燃助剂(5)的含氟树脂时,不含卤素 可以得到阻燃热塑性树脂组合物。 通过改性聚碳酸酯系树脂和苯乙烯系树脂的聚合物共混物的质量,可以获得具有改善的流动性和冲击强度的热塑性树脂。
    • 27. 发明授权
    • Alumina ceramic body
    • 氧化铝陶瓷体
    • US4735926A
    • 1988-04-05
    • US839579
    • 1986-03-14
    • Minato AndoMasaaki ItoFumio Mizuno
    • Minato AndoMasaaki ItoFumio Mizuno
    • C04B35/111H01B3/12H01P7/10C04B35/46
    • C04B35/111
    • A dielectric alumina ceramic body having a constant dielectric loss tangent tan .delta. is obtained by sintering a composition consisting essentially of:100 parts by weight of a ternary formulation consisting of 92.4 to 98.7 mol % Al.sub.2 O.sub.3, at least 0.5 mol % CaO, and 1.3 to 7.6 mol % TiO.sub.2 ; andat least one selected from the group consisting of Cr.sub.2 O.sub.3 and NiO subject to the relation of: ##EQU1## where x is the weight part of Cr.sub.2 O.sub.3 per 100 parts by weight of said formulation,y is the weight part of NiO per 100 parts by weight of said formulation, andz is the mol % of Al.sub.2 O.sub.3 in the formulation,provided that x.gtoreq.0 and y.gtoreq.0, except x=y=0.
    • 具有恒定介电损耗角正切tanδ的电介质氧化铝陶瓷体通过烧结基本上由以下组成的组合物获得:100重量份的由92.4至98.7mol%的Al 2 O 3,至少0.5mol%的CaO和1.3至 7.6mol%TiO 2; 和选自Cr 2 O 3和NiO中的至少一种,其关系如下:< IMAGE>其中x是每100重量份所述制剂的Cr 2 O 3的重量份,y是NiO每100重量份的重量份 所述制剂的重量,z是制剂中Al 2 O 3的摩尔%,条件是除了x = y = 0,x> = = 0且y> / = 0。