摘要:
The adhesive bonding of a silicone rubber to a metal surface can be very much improved by the use of the inventive primer composition, in particular, with respect to the heat resistance and anti-oil resistance of the adhesion. The inventive primer composition comprises (a) a substantially linear diorganopolysiloxane of gum-like consistency free from aliphatic unsaturation, (b) an organopolysiloxane with the organic group/silicon atom molar ratio of 1.9 to 2.3 and having a limited amount of vinyl groups directly bonded to the silicon atoms and a viscosity of 5 to 10,000 centistokes at 25.degree. C., (c) an organopolysiloxane resin with the molar ratio of organic groups/silicon atoms of 0.5 to 1.7, (d) an organosilane compound such as vinyl trimethoxysilane or vinyl tris(2-methoxyethoxy) silane, (e) a finely divided silica filler, (f) an organic peroxide and (g) a curing agent for silicone resins, all in limited weight proportions.
摘要:
A transparent, electrically conductive laminated structure composed of(A) a transparent solid substrate,(B) a thin layer of an oxide of titanium being contacted with the said substrate (A),(c) a thin layer of an electrically conductive metal being contacted with the said layer (B),(d) a thin layer of an oxide of titanium being contacted with the said layer (C), and(E) optionally, a transparent top layer being contacted with the said layer (D)characterized in that(i) the said substrate (A) is a film-forming synthetic resin layer and(ii) the said layer (B) is a layer of an oxide of titanium derived from a layer of an organic titanium compound and contains organic residual moieties of the said organic titanium compound;And a process for the production of the same.
摘要:
The invention provides a novel elastomer composition capable of giving vulcanized rubber products with superior solvent resistance, oil resistance, heat resistance and other properties. The composition is formulated with a polymer blend of an ethylene-propylene copolymeric elastomer and a specific organopolysiloxane having certain amount of mercapto-substituted organic groups bonded to the silicon atoms as the base component admixed with a filler and a crosslinking agent or a vulcanizing agent.
摘要:
The organopolysiloxane compositions comprising (a) a linear diorganopolysiloxane having a block structure composed of alternately linked two kinds of blocks of dimethylsiloxane units on one hand and of dimethylsiloxane units and methylvinylsiloxane units on the other hand, (b) a silica filler, (c) a methylhydrogenpolysiloxane as a crosslinking agent, and (d) a platinum catalyst for accelerating crosslinking by addition reaction. Cured silicone rubber elastomers obtained from the composition have very excellent mechanical properties, especially tear strength.
摘要:
A conductive powder having an organic silicon polymer layer on the surface of each particle and a metal layer enclosing the silicon polymer layer possesses a stronger bond between the particle base and the metal even at elevated temperature and exhibits a high and stable conductivity and heat resistance.
摘要:
A curable silicone composition based on an organopolysiloxane having a cyclotrisiloxane structure quickly cures by brief heating or ultraviolet exposure. It further contains an acid, acid generator, base or base generator or an oniom salt photo-initiator as a curing agent. The cured product has release property from adhesive substance which remains unchanged with the lapse of time and good mold release properties, and thus provides a lightly releasable cured film. The composition is widely used as adhesive tape backing agents, mold release agents, protective coating agents, water and oil repellent agents, and paint base.
摘要:
A semiconductor laser device of low operating current and low noise for the 780 nm band to be used as the light source for an optical disc and its fabrication method. The device comprises: a certain conduction type Ga.sub.1-Y1 Al.sub.Y1 As first light guide layer, a Ga.sub.1-Y2 Al.sub.Y2 As second light guide layer of said certain conduction type, or an In.sub.0.5 Ga.sub.0.5 P or an In.sub.0.5 (GaAl).sub.0.5 P or an InGaAsP second light guide layer, successively formed one upon another at least in one side of the principal plane of an active layer; an opposite conduction type Ga.sub.1-Z Al.sub.Z As current blocking layer formed on the second light guide layer and provided with a stripe-like window; and a Ga.sub.1-Y3 Al.sub.Y3 As cladding layer of the same conduction type a said light guide layers formed on said stripe-like window, wherein relations of Z>Y3>Y2 and Y1>Y2 are established among Y1, Y2 Y3 and Z that define the AlAs mole-fractions.