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.
摘要:
In a vehicle rear seat, slits are respectively formed in side wall portions of retainers provided on a vehicle body side and are respectively open at upper end sides of the side wall portions. Hinge pins respectively provided at lower end sides on side portions of a rear seat back are inserted in the corresponding slits to thereby couple the rear seat back to the vehicle body side via the retainers. Furthermore, in the vehicle rear seat, distal end sides of the hinge pins, that is, portions that protrude outward of the rear seat back, are respectively covered with covers attached to the corresponding retainers.
摘要:
An ultrapure water production facility and a method of monitoring ultrapure water include an ultrapure water production system, a first monitoring unit including a resistivity meter, a second monitoring unit including a dissolved gas concentration meter, a TOC meter, a hydrogen peroxide concentration meter, a silica meter, a boron meter, an evaporation residue meter, and a water temperature meter connected in parallel, and a third monitoring unit including a particle meter. The third monitoring unit is provided in parallel with the first monitoring unit and the first monitoring unit and the second monitoring unit are connected in series.
摘要:
In a seat, in a state in which tilting of a back main frame around a tilting center is locked by a reclining mechanism, a lower end of a back joint link is turnably joined to a vehicle side. Thus, turning of a first link, a back sub frame and the back joint link is locked, and operation of a back link mechanism is locked. Therefore, a supporting rigidity from rear side of a back side portion can be enhanced by the back link mechanism (the back sub frame), and a crew sitting in the seat can be thoroughly retained.