摘要:
A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.
摘要:
The present invention relates to a surface contour measuring tracer permitting a probe element to move in the directions of X-, Y- and Z-axes. A support structure includes a base supporting thereon an X-slider and a Y-slider which are movable in the directions of X- and Y-axes, respectively. A Z-slider is supported on the X-slider so to be movable in the direction of a Z-axis. Supported on the Z-slider is a probe element, the movements of which in the directions of X-, Y- and Z-axes are permitted by the movements of the X-, Y- and Z-sliders. The X- and Y-sliders are normally held at neutral positions by a wire spring extending in the direction of the Z-axis, and the Z-slider is permitted to move in the direction of the Z-axis against the action of a coil spring and normally held at a neutral position.
摘要:
A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.
摘要:
An air induction control device for an internal combustion engine is composed of an air passage for communicating upstream and downstream sides of a throttle valve in an intake passageway when opened, a valve member movably disposed in the air passage to open the air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway, and a diaphragm member mechanically connectable to the valve member so as to open the air passage in response to vacuum prevailing in the intake passageway downstream of the throttle valve, thereby effectively controlling air induction to the engine, even when the throttle valve is closed during normal engine deceleration and at sudden engine deceleration or during operation of engine accessories at idle throttle state.
摘要:
An olefin polymerization catalyst comprising a solid catalyst (I) and an organometallic compound (II), wherein said solid catalyst (I) is obtainable by reacting an organomagnesium compound (a) soluble in hydrocarbon solvent and represented by the following formula:MgR.sup.1.sub.p R.sup.2.sub.q X.sub.r(in the formula, R.sup.1 and R.sup.2, identical or different, represent a secondary or tertiary alkyl group having 4-6 carbon atoms, X represents a negative group containing O, N or S atom, p and q represent a number of 0-2, r represents a number of 0-1, and p, q and r satisfy: p+q+r=2) with a compound of titanium or vanadium having at least one halogen atom (b), has a high activity, is uniform, has a high density, is suitable for continuous polymerization of olefins, and enables to omit the catalyst removal step after the polymerization reaction.An olefin polymerization catalyst obtainable by replacing the solid catalyst (I) with a solid type catalyst (I') obtainable by further reacting solid catalyst (I) with compound (b) or with an organic or inorganic compound of aluminum, silicon, tin or antimony (c), and catalysts obtainable by adding a halogenated hydrocarbon (III) to the above-mentioned olefin polymerization catalysts give polyolefins having a broad molecular weight distribution.
摘要:
A catalyst useful for polymerizing olefins, capable of providing an extremely high catalyst efficiency, excellent grain size and high bulk density of polymer; production of polymer having various molecular weight distributions from a broader range to a narrower range and controlling of die swell of formed polymer, by using a mechanical grinding and contacting means. Said catalyst shows a high activity and higher stereoregularity in the polymerization of polypropylene when it is used together with an electron donor compound.Said catalyst comprises a solid catalyst component (A) and an organometallic compound (B), said catalyst component (A) is obtained by reacting a specified organomagnesium component (i) with a specified chlorosilane compound (ii) and reacting and/or grinding-contacting the solid obtained by the reaction of (i) and (ii) with a titanium and/or vanadium compound containing at least one halogen atom.The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein .alpha. is a number of 0 or greater than 0; .beta.>0; p, q, r and s are each a number of 0 or greater; p+q+r+s=m.alpha.+2.beta. wherein m is the valency of M; M is a metal element of the 1st to the 3rd group of the Periodical Table; R.sup.1 and R.sup.2 are the same or different hydrocarbon radicals having 1 to 20 carbon atoms; X and Y are the same or different radicals selected from the group consisting of halogen, OR.sup.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 and SR.sup.9 wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each hydrogen atom or a hydrocarbon radical having 1 to 20 carbon atoms and R.sup.9 is a hydrocarbon radical having 1 to 20 carbon atoms, and chlorosilane is of the formulaH.sub.a SiCl.sub.b R.sub.4-(a+b)wherein a and b are each a number greater than 0, having the relationships a.ltoreq.2 and a+b.ltoreq.4 wherein R is a hydrocarbon radical having 1 to 20 carbon atoms.
摘要:
Novel high active catalysts useful for highly stereospecific polymerization of olefin which enables to produce polymer of low content of catalyst residue, and of good grain size having a high stereoregularity can be obtained by a combination of [A] a solid catalyst component obtained by reacting and/or grinding a specified organomagnesium component (i) with a specified chlorosilane compound containing Si-H (ii) to obtain a solid (1) and reacting said solid (1) with a titanium compound containing at least one halogen atom (2) and a carboxylic acid or a derivative thereof (3) and [B] a component consisting of an organometallic compound and a carboxylic acid or a derivative thereof. The organomagnesium component is of the formulaM.sub..alpha. Mg.sub..beta. R.sub.p.sup.1 R.sub.q.sup.2 X.sub.r Y.sub.swherein .alpha. is a number of 0 or greater than 0; .beta.>0, p, q, r, and s are each a number of 0 or greater; p+q+r+s=m.alpha.+2.beta. wherein m is the valency of M; M is a metal element of the 1st to the 3rd group of the Periodic Table; R.sup.1 and R.sup.2 are the same or different hydrocarbon radicals having 1 to 20 carbon atoms; X and Y are the same or different radicals selected from the group consisting of halogen, OR.sup.3, OSiR.sup.4 R.sup.5 R.sup.6, NR.sup.7 R.sup.8 and SR.sup.9 wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are each hydrogen atom or a hydrocarbon radical having 1 to 20 carbon atoms and R.sup.9 is a hydrocarbon radical having 1 to 20 carbon atoms, and chlorosilane is of the formulaH.sub.a SiCl.sub.b R.sub.4-(a+b)wherein a and b are each a number greater than 0, having the relationships a.ltoreq.2 and a+b.ltoreq.4 wherein R is a hydrocarbon radical having 1 to 20 carbon atoms.
摘要翻译:可以通过将[A]通过反应获得的固体催化剂组分与通式(1)所得的固体催化剂组分的组合,得到可用于烯烃的高立体特异性聚合的新型高活性催化剂,其能够生产低含量催化剂残余物和具有高立构规整性的良好晶粒尺寸的聚合物, /或用指定的含有Si-H(ⅱ)的氯代硅烷化合物研磨指定的有机镁组分(ⅰ),得到固体(1),并使所述固体(1)与含有至少一个卤素原子(2)和 羧酸或其衍生物(3)和[B]由有机金属化合物和羧酸或其衍生物组成的组分。 有机镁组分的分子式为MαMgβRp1Rq2XrYs,其中α为0或大于0; β> 0,P,Q,R和S是每个0或更大的数目; P + Q + R + S = Mα+ 2β,其中M是M的值; M是周期表第1至第3组的金属元素; R1和R2是相同或不同的具有1至20个碳原子的烃基; X和Y是选自卤素,OR 3,OSiR 4 R 5 R 6,NR 7 R 8和SR 9中相同或不同的基团,其中R 3,R 4,R 5,R 6,R 7和R 8各自为氢原子或具有1至20个碳原子的烃基 并且R 9是具有1至20个碳原子的烃基,并且氯代硅烷具有式HaSiClbR 4 - (a + b)。其中A和B在每个大于0的数字之间,具有相关性A = 2和A + B R是具有1至20个碳原子的烃基。
摘要:
A novel process for polymerizng ethylene or a mixture of ethylene and another olefin is provided. In this process a novel catalyst having a very high activity per solid component of catalyst is used. Said catalyst is prepared by reacting a specific hydrocarbon-soluble organoaluminum-magnesium complex containing alkoxy, aryloxy, siloxy or siloxane groups, with one or more kinds of a titanium or vanadium compound having at least one halogen atom, and subsequently reacting the thus obtained hydrocarbon-insoluble reaction product (A) with a specified organoaluminum compound (B).
摘要:
The present invention provides a brine composition for a frozen food which does not raise the freezing temperature even if the ethanol concentration is low, and is therefore able to suppress tissue breakdown caused by the growth of water ice crystals in the tissues (cells) of foods, and a method for producing a frozen food. The brine composition for a frozen food contains 30 to 70% by weight of ethyl alcohol, 0.5 to 10.0% by weight of erythritol, and water. It is preferable that the concentration of the ethyl alcohol is 35 to 60% by weight, the concentration of the erythritol is 0.8 to 5.0% by weight, and the rest is water.