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.
摘要:
A curable fluorosilicone resin composition is disclosed, which composition comprises(A) 100 parts by weight of a fluorosilicone resin obtained by cohydrolyzing a mixture of(a) 50 to 95 mole percent of a perfluoroalkyl-containing organosilane having the formula R--CH.sub.2 CH.sub.2 SiX.sub.3,(b) 5 to 50 mole percent of an epoxy-containing organosilane having the formula Z.sub.w SiX.sub.4-w and, optionally,(c) up to 50 mole percent of an organosilane having the formula R.sup.1.sub.n SiX.sub.4-n, wherein R is a perfluoroalkyl group containing 4 to 15 carbon atoms, X is a hydrolyzable group, Z is an epoxy-containing monovalent organic group, R.sup.1 is hydrogen or a monovalent hydrocabon group containing 1 to 15 carbon atoms, w is 1, 2 or 3 and n is 0, 1, 2 or 3; and(B) 1 to 50 parts by weight of a crosslinking agent selected from the group consisting of(i) an amino group-containing organosilicon compound that contains at least 2 nitrogen-bonded active hydrogens in each molecule and(ii) a fluorine compound that contains at least 2 carboxyl groups and at least 2 fluorine atoms in each molecule. When cured, the composition provides a film that is both highly water repellent and highly oil repellent.
摘要:
The present invention relates to a method for removing a silicone resin coating from a substrate comprising contacting the silicone resin coating with an aqueous alkali solution, wherein the silicone resin in the coating is a solid silicone resin having the formula (HR.sub.2 SiO.sub.1/2).sub.n (SiO.sub.4/2).sub.m, wherein R is an alkyl group, m is a number greater than 0, n is a number greater than 0, and n/m is greater than 0.2.
摘要:
Alpha, omega-dihydroxyperfluoroalkylethylmethylpolysiloxanes are prepared by reacting zinc oxide with a perfluoroalkylethylmethyldichlorosilane in an organic solvent, followed by the addition of water and protic acid with stirring to the resulting reaction mixture to generate the silanol group at the molecular chain terminals of the resultant polysiloxane. The advantage of the present method is the negligible yield of the corresponding cyclic polyorganosiloxanes.
摘要:
A fuel control system for an engine has a fuel injector which injects fuel into an intake passage communicating with a combustion chamber. The quantity of a direct delivery part of fuel injected from the fuel injector which is directly fed to the combustion chamber is estimated, the quantity of a drawn part of fuel which has been on a wall surface of the intake passage and is vaporized and fed to the combustion chamber together with the direct delivery part is estimated, and the quantity of fuel to be injected from the fuel injection means is dcetermined on the basis of the estimated quantities of the direct delivery part and the drawn part so that the sum of them provides a desired quantity of fuel to be fed to the combustion chamber. The estimated quantity of at least one of the direct delivery part and the drawn part is increased as a factor which governs the degree of evaporation of the fuel on the wall surface changes in such a direction as to promote evaporation of the fuel on the wall surface.
摘要:
A seat configuration member and a vehicle seat employing the seat configuration member are provided that are capable of covering reclining mechanism components and maintaining a high quality external appearance of the vehicle seat, and are moreover capable of achieving a reduction in the number of components. A lower side coupling and fixing portion disposed on a seat width direction outer side of a seat back board that is made from resin is integrally formed with an attachment portion that is L-shaped in plain view. A side airbag device is attached to a horizontal wall portion of the attachment portion. A seatback pad and a cover are mounted to the seat back board configured as described above, and the seat back board is assembled to side frames of a seatback frame.
摘要:
Disclosed is a method for suppressing the growth of a target cell, which is not limited in the type of a target cell and the type of a protein to be expressed in the target cell and needs not any preparatory experiment for determining a codon to be contained in a protein to be expressed in a target cell. Specifically disclosed is a method for suppressing the growth of a target cell, which comprises the steps of: incorporating DNA containing a region encoding a protein into the target cell, and allowing a protein encoded by the DNA to be expressed in the target cell into which the DNA has been incorporated. The region contained in the DNA comprises a tri-nucleotide sequence. The tri-nucleotide sequence is selected from codons that define at least some amino acid species constituting the protein, and is complementary to at least some codons that are used in the target cell at a frequency of 0.2 or less.