公开(公告)号：US5194649A

公开(公告)日：1993-03-16

申请号：US825906

申请日：1992-01-27

申请人： Tadashi Okawa

发明人： Tadashi Okawa

IPC分类号： C07F7/18 ,  C07F7/08 ,  C07F7/12

CPC分类号： C07F7/0858 ,  C07F7/0896 ,  C07F7/12

摘要： This invention relates to an organopentasiloxane with the following formula ##STR1## wherein A is the hydrogen atom or an aliphatically unsaturated monovalent hydrocarbon group, R is the same or different monovalent hydrocarbon group, and n is an integer with a value of 2 to 4, which carries silicon-bonded hydrogen or a silicon-bonded, aliphatically unsaturated monovalent hydrocarbon group at one molecular chain terminal and silicon-bonded organoxy group(s) at the other terminal.

公开(公告)号：US5169909A

公开(公告)日：1992-12-08

申请号：US826344

申请日：1992-01-27

申请人： Tadashi Okawa

发明人： Tadashi Okawa

IPC分类号： C08G77/06 ,  C08G77/04 ,  C08G77/12 ,  C08G77/22 ,  C08G77/38

CPC分类号： C08G77/045 ,  C08G77/12

摘要： A method for the preparation of an organopolysiloxane which contains in each molecule at least one phenyl group and at least one silicon-bonded hydrogen atom is disclosed, said method comprising reacting (I) an organopolysiloxane having a molecular weight not exceeding 100,000 and containing in each molecule at least one phenyl group and at least one alkoxy group with (II) 1,1,3,3-tetramethyldisiloxane, wherein the reaction is carried out in the presence of an aqueous hydrochloric acid solution, this aqueous solution preferably further comprising an alcohol.

摘要翻译： 公开了一种在每个分子中含有至少一个苯基和至少一个与硅键合的氢原子的有机聚硅氧烷的制备方法，所述方法包括使（I）分子量不超过100,000的有机聚硅氧烷和 分子至少一个苯基和至少一个烷氧基与（II）1,1,3,3-四甲基二硅氧烷，其中反应在盐酸水溶液的存在下进行，该水溶液优选还包含醇 。

公开(公告)号：US5053473A

公开(公告)日：1991-10-01

申请号：US187123

申请日：1988-04-28

申请人： Toshio Suzuki ,  Tadashi Okawa

发明人： Toshio Suzuki ,  Tadashi Okawa

IPC分类号： C08G77/22 ,  C08G77/38 ,  C08G77/385 ,  C09K19/40

CPC分类号： C08G77/38 ,  C09K19/408

摘要： The present invention relates to a method for the production of liquid-crystalline organopolysiloxane which provides for the facile introduction of a mesogenic group without the use of a hydrosilylation reaction.

公开(公告)号：US4924020A

公开(公告)日：1990-05-08

申请号：US269804

申请日：1988-11-10

申请人： Tadashi Okawa ,  Toshio Suzuki

发明人： Tadashi Okawa ,  Toshio Suzuki

IPC分类号： C08G77/14 ,  C08G77/22 ,  C08G77/38 ,  C08G77/382

CPC分类号： C08G77/38

摘要： There is disclosed a novel phthalic acid ester-modified organopolysiloxane having the general formula ##STR1## where in R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is a group R.sup.1 or a group with the formula ##STR2## with the proviso that at least one of the groups R.sup.2 in each molecule is the group with the formula ##STR3## in which R.sup.3 is an alkyl group, R.sup.4 is an alkylene group, and m is a positive integer.The organosiloxane is useful as a co-reactant in the preparation of organic resins such as polyesters, polyamides and polyimides.

公开(公告)号：US4876373A

公开(公告)日：1989-10-24

申请号：US242237

申请日：1988-08-31

申请人： Tadashi Okawa ,  Toshio Suzuki

发明人： Tadashi Okawa ,  Toshio Suzuki

IPC分类号： C08G77/06 ,  C08G77/08 ,  C08G77/12 ,  C08G77/14 ,  C08G77/16 ,  C08G77/20 ,  C08G77/22

CPC分类号： C08G77/20 ,  C08G77/08

摘要： Polymerizing cyclic trisiloxanes using as the polymerization initiator an alkali metal salt of an organosilane or organopolysiloxane having a terminal alkenyl group, followed by termination of the reaction, produces an organopolysiloxane having an alkenyl group on one end. These organopolysiloxanes are useful for making copolymers and as additives to siloxane elastomers.

摘要翻译： 使用具有末端烯基的有机硅烷或有机聚硅氧烷的碱金属盐作为聚合引发剂聚合环状三硅氧烷，随后终止反应，在一端产生具有烯基的有机聚硅氧烷。 这些有机聚硅氧烷可用于制备共聚物和作为硅氧烷弹性体的添加剂。

公开(公告)号：US4874881A

公开(公告)日：1989-10-17

申请号：US242016

申请日：1988-09-08

申请人： Toshio Suzuki ,  Tadashi Okawa

发明人： Toshio Suzuki ,  Tadashi Okawa

IPC分类号： C08G77/06 ,  C08G77/08 ,  C08G77/20 ,  C08G77/22

CPC分类号： C08G77/20 ,  C08G77/08

摘要： Polydiorganosiloxanes which have a pendant alkenyl radical in the middle of the molecular chain are prepared by a nonequilibrium, living polymerization of cyclic trisiloxanes using an organopolysiloxane alkali metal salt of the formula ##STR1## where M is lithium, sodium, or potassium, which takes place under substantially anhydrous conditions, and the polymerization is terminated with an end-capping reaction to produce a polydiorganosiloxane of the formula ##STR2## where R.sup.1 is an alkenyl radical. These polymers can be used to make graft copolymers and can be made more functional when the ends are capped with functional groups.

公开(公告)号：US4188663A

公开(公告)日：1980-02-12

申请号：US877982

申请日：1978-02-15

申请人： Tadashi Okawa ,  Mitsuyuki Honbu ,  Yasuo Matsuda

发明人： Tadashi Okawa ,  Mitsuyuki Honbu ,  Yasuo Matsuda

IPC分类号： H02H3/24 ,  H02H7/12 ,  H02M5/45 ,  H02M7/515 ,  H02M7/00

CPC分类号： H02M5/4505 ,  H02H3/24 ,  H02H7/12

摘要： A current source inverter having a converter for changing alternating current into direct current, an inverter for changing the d.c. output of the converter into alternating current, and a reactor interposed between the converter and the inverter comprises power failure detecting means for detecting the power failure of the a.c. input of the converter. The power failure detecting means is constructed of square wave generator circuits which generate square waves when voltages in respective polarities of respective phases of the a.c. input exist, an adder which adds the outputs of said square wave generator circuits, and a comparator which compares an output of said adder with a predetermined value and which provides an output when the adder output is below the predetermined value. Both terminals of the reactor of the current source inverter are substantially short-circuited by the output of said power failure detecting means, thereby to prevent occurrence of an overvoltage at the time of the power failure of the a.c. input of the converter.

摘要翻译： 一种电流源逆变器，具有用于将交流电变换成直流电的转换器，用于改变直流电的逆变器。 所述转换器输出为交流电，并且置于所述转换器和所述逆变器之间的电抗器包括用于检测所述变换器与所述逆变器的电源故障的电力故障检测装置。 转换器的输入。 电源故障检测装置由方波发生器电路构成，当电流处于各个相位的相应极性时，产生方波。 输入存在，加法器，其将所述方波发生器电路的输出相加，比较器将所述加法器的输出与预定值进行比较，并且当加法器输出低于预定值时提供输出。 电流源逆变器的电抗器的两端都由所述电源故障检测装置的输出端短路，从而防止在交流电源断电时发生过电压。 转换器的输入。

公开(公告)号：US3993446A

公开(公告)日：1976-11-23

申请号：US521718

申请日：1974-11-07

申请人： Tadashi Okawa

发明人： Tadashi Okawa

IPC分类号： C22C29/06 ,  C22C29/08 ,  B22F3/00

CPC分类号： C22C29/08 ,  C22C29/067

摘要： Cemented carbide material consists essentially of 70 to 90% by weight of tungsten carbide or of a mixture of tungsten and carbide at least one transition metal carbide, the transition metal being one other than tungsten selected from Groups IV to VI of the Periodic Table and 10 to 30% by weight of a binder. The binder contains 20 to 90% by weight of nickel, 10 to 80% by weight of cobalt and 5 to 25% by weight of chromium as the base ingredients thereof. The cemented carbide material has improved resistance to oxidation, to wear and especially to thermal cracking and is therefore suitable for rolls, guide rollers and dies for plastic hot working.

摘要翻译： 硬质合金材料基本上由70-90重量％的碳化钨或钨和碳化物的混合物组成，至少一种过渡金属碳化物，过渡金属是选自元素周期表第Ⅳ至Ⅵ族的钨，另外10个 至30重量％的粘合剂。 粘合剂含有20〜90重量％的镍，10〜80重量％的钴和5〜25重量％的铬作为其基础成分。 硬质合金材料具有改善的耐氧化性，耐磨性，特别是热裂纹性能，因此适用于用于塑料热加工的辊，导辊和模具。