摘要:
A silicone rubber emulsion composition comprising (A) 100 parts diorganopolysiloxane having at least two silicon-bonded alkenyl groups, (E) 0 to 60 parts reinforcing silica filler, (B) 10 to 250 parts water containing a smectite clay, (C) 0.1 to 15 parts emulsifier, and (D) a cross-linking agent (e.g., an organohydrogenpolysiloxane) in an amount sufficient for cross-linking component (A) and a catalyst (e.g., a platinum-type catalyst). A method for preparing the aforementioned emulsion composition comprising mixing components (A) and (E) with other components in a high-speed stirrer-equipped mixer. A method of manufacturing a silicone rubber comprising either heating and dehydrating the aforementioned emulsion composition.
摘要:
A silicone rubber emulsion composition comprising (A) 100 parts diorganopolysiloxane having at least two silicon-bonded alkenyl groups, (E) 0 to 60 parts reinforcing silica filler, (B) 10 to 250 parts water containing a smectite clay, (C) 0.1 to 15 parts emulsifier, and (D) a cross-linking agent (e.g., an organohydrogenpolysiloxane) in an amount sufficient for cross-linking component (A) and a catalyst (e.g., a platinum-type catalyst). A method for preparing the aforementioned emulsion composition comprising mixing components (A) and (E) with other components in a high-speed stirrer-equipped mixer. A method of manufacturing a silicone rubber comprising either heating and dehydrating the aforementioned emulsion composition.
摘要:
The present invention provides carbon fiber paper consisting of an organic high-molecular compound as a binder and carbon fibers, characterized in that the carbon fibers contain thin fibers with an average diameter smaller than 5 μm and an average fiber length of 3 to 10 mm; a porous carbon electrode substrate for a fuel cell having a thickness of 0.05 to 0.5 mm and a bulk density of 0.3 to 0.8 g/cm3, also having a bending strength of 10 MPa or higher and a deflection of 1.5 mm or more at the time of bending, measured by a three-point bending test in conditions of using a sample width of 1 cm, a strain rate of 10 mm/min, and a distance between supporting points of 2 cm; and a method of producing a porous carbon electrode substrate for a fuel cell by impregnating the carbon fiber paper with a thermosetting resin, curing the thermosetting resin by heating and pressing treatment, and then carbonizing the paper. The electrode substrate of the present invention is excellent in flexibility and bending strength and able to be rolled on a roll and thus has high productivity, and the carbon fiber paper of the present invention is suitable for producing the electrode substrate.
摘要翻译:本发明提供由作为粘合剂的有机高分子化合物和碳纤维组成的碳纤维纸,其特征在于,所述碳纤维含有平均直径小于5μm,平均纤维长度为3〜10mm的细纤维; 具有厚度为0.05〜0.5mm,体积密度为0.3〜0.8g / cm 3的燃料电池用多孔碳电极基板,其弯曲强度为10MPa以上,偏转 在使用1cm的样品宽度,10mm / min的应变速度和2cm的支撑点之间的距离的条件下,通过三点弯曲试验测定弯曲时的1.5mm以上的1.5mm以上。 以及通过用热固性树脂浸渍碳纤维纸来制造用于燃料电池的多孔碳电极基板的方法,通过加热和压制处理固化热固性树脂,然后碳化碳纸。 本发明的电极基板的柔软性和弯曲强度优异,能够在辊上滚动,因此具有高生产率,本发明的碳纤维纸适用于制造电极基板。
摘要:
Method and apparatus for cutting high viscosity liquid material, said apparatus comprising a cylinder divided into upper and lower tanks by a partition with a central discharge opening, a moveable and elevatable liquid supply pipe with a distal end positioned opposite the discharge opening, the liquid supply pipe being mounted so that it can be raised until its distal end contacts the partition around the discharge opening, and then lowered until there is no contact, means for raising and lowering the liquid supply pipe, the upper tank having peripheral injection ports for injecting a low viscosity liquid into the upper tank, means for feeding high viscosity liquid material into the lower tank and flowing it into the upper tank, means for feeding low viscosity liquid into the liquid supply pipe and for feeding low viscosity liquid into the peripheral injection ports, the high viscosity liquid material flowing from the lower tank into the upper tank when the liquid supply pipe is lowered, the high viscosity liquid material being pushed upwardly into the upper tank by the low viscosity liquid when the liquid supply pipe is raised, whereby the high viscosity liquid material being pushed upwardly in the upper tank is cut into blocks by the low viscosity liquid being injected into the upper tank.
摘要:
A silicone rubber particulate composition useful as an additive for cosmetics, rubbers, resins and paints is disclosed, said composition comprising:(A) a silicone rubber particulate having an average particle size of 0.1 to 1,000 .mu.m;(B) a water-absorptive resin particulate having a water-free average particle size of 0.1 to 1,000 .mu.m; and(C) water,wherein said component (B) is present at a level of 0.01 to 5 weight percent measured on a water-free basis relative to component (A) and said water is present at a level of 10 to 10,000 weight parts for each 100 weight parts of component (B).
摘要:
A method for manufacturing of a silicone rubber base composition in a mass-like form, comprises:(A) preparing a freely flowable powdered silicone rubber composition comprising(a) a cross-linkable polydiorganosiloxane with a viscosity of at least 1.times.10.sup.5 mPa.s at 25.degree. C. and(b) an inorganic filler, and(B) continuously kneading and massing the powdered silicone rubber composition in a multiple-stage siding shear-type single-screw extruder.This method provides for continuous preparation of a silicone rubber base compound without the use of a dual-screw mixer-extruder having a large length to diameter ratio, without abrasive wear of screws and cylinders with such inorganic fillers as diatomaceous earth power, quartz or a similar large-grain and hard powders, without blackening of the mixed silicone rubber composition, and without production problems associated with the use of large quantities of fumed silica, sedimentary silica, or a similar reinforcing silica.
摘要:
Curable fluororubber compositions exhibit excellent processability on roll mills and can be molded without sticking to or staining the mold surfaces when the composition contains from 0.1 to 30 weight parts per 100 weight parts of fluororubber of a finely divided cured silicone material in the form of a rubber, gel or resin. An epoxy-substituted alkoxysilane or a partial hydrolysis product thereof is present as an ingredient of the curable composition when it is desired to cohesively bond the cured fluororubber to a metal or plastic substrate.
摘要:
The present invention provides a method for producing silicone rubber moldings composed of a uniform, smooth and hard exterior layer and a relatively soft interior portion. In accordance with this method the surfaces of the mold cavity are coated with an organohydrogenpolysiloxane containing at least two silicon-bonded hydrogen atoms before the curable organosiloxane used to form the interior portion of the molding is injected into the mold cavity and cured.
摘要:
Cohesive bonding between silicone rubber compositions and plastics is achieved using primer compositions comprising a solution of at least one member of a specified class of organotitanate esters in an organic liquid. Cohesive bonding of silicone rubber compositions to both plastic and metals is achieved by including at least one member from either of two specified classes of organosilicon compounds in the primer composition together with the organotitanate ester.
摘要:
A mixture of an alkoxy containing silicon compound, a hydroperoxide, and organic solvent is a primer composition useful for bonding heat curing silicone rubber, especially fluorosilicone rubber, to a substrate.