摘要:
The present invention relates to cyclic organosilicon compounds which are viscous liquids at room temperature and have a high surface tension. The present invention also relates to methods of making the cyclic organosilicon compounds which easily produce these compounds in good yields.
摘要:
The introduction of release coating-forming silicone compositions that yield cured release coatings that exhibit excellent release properties against tacky substances and do not impair the residual adhesion of tacky substances.Silicone composition for the formation of cured release coatings, that characteristically comprises(A) 100 weight parts of a cured coating-forming silicone composition into which there is admixed(B) 0.5 to 500 weight parts organosilicon polymer with the following average unit formula ##STR1## wherein R represents C.sub.1 to C.sub.10 monovalent hydrocarbon groups that are free of aliphatic unsaturation; R.sup.1 represents organic groups selected from the group consisting essentially of C.sub.2 to C.sub.20 alkylene groups and organic groups with the formulas --R.sup.3 (OR.sup.3).sub.y -- and --R.sup.3 --(R.sub.2 SiO).sub.z R.sub.2 Si--R.sup.3 -- (R is defined as above, R.sup.3 denotes C.sub.2 to C.sub.20 alkylene groups, which may be the same or different, y is an integer with a value of 1 or more, and z is zero or an integer with a value of 1 or more); R.sup.2 represents groups selected from the group consisting essentially of C.sub.1 to C.sub.10 monovalent hydrocarbon groups, the hydrogen atom, C.sub.1 to C.sub.10 alkoxy groups, and the hydroxyl group; n=3 to 20; x=1 to 13; and n.gtoreq.x.
摘要翻译:引入形成脱胶涂层的脱模涂层硅氧烷组合物,其产生对粘性物质具有优异的剥离性能并且不损害粘性物质的残留粘附性的固化脱模涂层。 用于形成固化剥离涂层的硅氧烷组合物,其特征在于包含(A)100重量份固化的涂覆形成硅氧烷组合物,其中混合(B)0.5至500重量份的具有以下平均单元式的有机硅聚合物其中R表示不含脂族不饱和度的C1至C10单价烃基; R1表示选自基本上由C2〜C20亚烷基组成的组的有机基团和具有式-R3(OR3)y-和-R3-(R2SiO)zR2Si-R3-的有机基团(R定义如上,R3表示C2 至20个亚烷基,其可以相同或不同,y为1以上的整数,z为0或为1以上的整数)。 R2表示选自基本上由C1至C10单价烃基,氢原子,C1至C10烷氧基和羟基组成的组的基团; n = 3〜20; x = 1〜13; 和n> / = x。
摘要:
A method for manufacturing, with high yield and without accompanying depolymerization, an organosilicon polymer with double-ended functionality which contains a bond between a silicon atom and a hydrogen atom or an alkenyl group at both ends of the molecular chain. The organosilicon polymer with double-ended functionality is expressed by the general formula:R.sup.3 R.sup.1.sub.2 SiO(R.sup.1.sub.2 SiO).sub.p R.sup.1.sub.2 Si {R.sup.4 R.sup.1.sub.2 SiO(R.sup.1.sub.2 SiO).sub.m SiR.sup.1 .sub.2 }.sub.n R.sup.3.wherein R.sup.1 is a C.sub.1-10 monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond, R.sup.2 is a C.sub.2-10 alkenyl group, R.sup.3 in the same molecule is either only a hydrogen atom or only a C.sub.2-10 alkenyl group, R.sup.4 is a C.sub.2-10 alkylene group, m is an integer equal to or greater than 0, n is a positive integer and p is an integer equal to or greater than 0. This method is an addition polymerization of a diorganosiloxane expressed by the general formulaR.sup.3 R.sup.1.sub.2 SiO(R.sup.1.sub.2 SiO).sub.m SiR.sup.1.sub.2 Hand a diorganosiloxane expressed by the general formula:R.sup.3 R.sup.1.sub.2 SiO(R.sup.1.sub.2 SiO).sub.p SiR.sup.1.sub.2 R.sup.3in the presence of a catalyst for producing a hydrosilylation.
摘要:
A curable composition suitable for treating substrates in order to render them oil repellent, water repellent and stain resistant, said composition comprising:(A) a fluorine-containing organosilicon compound having the general formula ##STR1## wherein R.sup.1 denotes a monovalent hydrocarbon group, excluding alkenyl groups, R.sup.2 denotes a divalent organic group, a is 2 or 3, and m is an integer having a value of 4 to 12, or a partial hydrolysis and condensation product thereof, and(B) a catalytic quantity of a condensation-reaction catalyst.
摘要:
A fuel control system causes a fuel injector to interrupt fuel injection during a continuous decrease in engine speed to a lower limit of a hysteresis range for fuel supply/fuel interruption and to resume the interruption of fuel supply after a continuous increase in engine speed beyond an upper limit of the hysteresis range and further causes a compulsory interruption of fuel supply when a transition of the engine from non-deceleration to deceleration while the engine operates at speeds between the lower and upper limits of the hysteresis range.
摘要:
There is disclosed a method for the preparation of an organosilicon polymer having the structure ##STR1## wherein each R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is an alkylene group, R.sup.3 is selected from hydrogen, an alkenyl group or a hydroxyl group, m is zero or greater and n is 1 or more, said method comprising:reacting(A) diorganosiloxane having the general formula ##STR2## (B) an unsaturated aliphatic hydrocarbon having 3 to 10 carbon atoms that contains 2 carbon-carbon double bonds and an unsaturated aliphatic hydrocarbon having 2 to 10 carbon atoms that contains 1 carbon-carbon triple bond, said reaction taking place in the presence of(C) a hydrosilylation-reaction catalyst.
摘要:
A silicone rubber composition having good processability and good molding properties is disclosed, said composition comprising:(A) an organopolysiloxane containing vinyl groups;(B) a fluorine resin powder;(C) an organopolysiloxane containing units having the formulaF(CF.sub.2).sub.a CH.sub.2 CH.sub.2 Si(Me).sub.n O.sub.3-n/2in which a is an integer of at least 4, n is 0, 1 or 2 and Me denotes a methyl radical;(D) a reinforcing silica powder having a surface area of at least 50 m.sup.2 /g; and(E) a sufficient quantity of a curing agent to cure said composition.
摘要:
For an internal combustion engine with a supercharger, a slip of the driven wheel is controlled by reducing torque of the engine, when the extent of the slip becomes large in relation to a road surface. When the running status of the engine exists in a non-supercharging region, the slip is controlled by at least one of operations for reducing the amount of fuel to be supplied to the engine and for retarding the timing of ignition (first slip control). On the other hand, in a supercharging region, the slip is controlled by lowering the pressure to be supercharged (second slip control). In a transient period of time when the running status of the engine is caused to shift from the non-supercharging region to the supercharging region when the first slip control is being conducted in the non-supercharging region, the first slip control is allowed to be continued until the slip is caused to be converged, in place of the second slip control.
摘要:
A curable fluorosilicone resin composition is disclosed, which composition comprises(A) 100 parts by weight of a fluorosilicone resin consisting essentially of F(CF.sub.2)aCH.sub.2 CH.sub.2 SiO.sub.3/2) siloxane units and, optionally, R.sub.b SiO.sub.(4-b)/2 siloxane units, wherein R is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, a is an integer with a value of at least 4 and b is an integer with a value of 0 to 3, with the proviso that when said fluorosilicone resin contains said R.sub.b SiO.sub.(4-b)/2 siloxane units, the ratio of said F(CF.sub.2).sub.a CH.sub.2 CH.sub.2 SiO.sub.3/2 siloxane units to said R.sub.b SiO.sub.(4-b)/2 siloxane units is at least 1;(B) 1 to 90 parts by weight of a component selected from the group consisting of an organosilane and its partial hydrolysis product, said organosilane having the general formula R.sup.1.sub.c SiX.sub.4-c wherein R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms, c is 0, 1, or 2 and X is a hydrolyzable group; and(c) a sufficient amount of a condensation catalyst to accelerate the cure of said fluorosilicone resin composition.
摘要:
The instant invention pertains to novel fluorosilicone polymers that have a very low surface tension, excellent oil resistance, excellent heat resistance, and so forth.The fluorosilicone polymers of the instant invention are fluorosilicone polymers comprised of siloxane unit with the following formula[F(CF.sub.2).sub.a C.sub.2 H.sub.4 ].sub.2 SiO.sub.2/2 (a)where a is an integer with a value of 1 to 10 and fluorosilicone polymers as represented by the following formula{[F(CF.sub.2).sub.a C.sub.2 H.sub.4 ].sub.2 SiO.sub.2/2 }.sub.x (R.sub.2 SiO.sub.2/2).sub.y (c)wherein a is an integer with a value of 1 to 10, x is an integer with a value of at least 2, y is an integer with a value of at least 1, x>y, and R is a monovalent hydrocarbon group.