摘要:
A curing composition comprising (1) a fluorine-containing curing monomer containing a fluorinated alkyl group having not less than 6 carbon atoms, (2) a fluorine-containing curing monomer containing a fluorinated alkyl group having not more than 5 carbon atoms, and (3) a polyfunctional curing monomer, the weight ratio of said fluorine-containing curing monomer (1) to said fluorine-containing curing monomer (2) ranging from 75/25 to 99/1. The composition is coated on an optical fiber base and cured by active energy rays to provide a core/clad optical fiber excellent in transparency, mechanical strength, environmental resistance, and optical characteristics.
摘要:
The present invention provides a curable composition for use in optical fiber cladding comprising 48.8.about.92.9 wt % of 2-(perfluorooctyl) ethyl acrylate (I), 1.3.about.23.8 wt % of 2,2,3,3-tetrafluoroproprylacrylate (II), 5.0.about.30.0 wt % of trimethylolpropane triacrylate (III), and 0.1.about.5.0 wt % of photopolymerization initiator (IV), wherein the weight ratio [(I)/(II)] of monomer (I) and monomer (II) is within a range of from 75/25 to 98/2, and an optical fiber having cladding formed by the hardening of this curable composition and a core comprising quartz.
摘要:
A curing composition comprising (1) a fluorine-containing curing monomer containing a fluorinated alkyl group having not less than 6 carbon atoms, (2) a fluorine-containing curing monomer containing a fluorinated alkyl group having not more than 5 carbon atoms, and (3) a polyfunctional curing monomer, the weight ratio of said fluorine-containing curing monomer (1) to said fluorine-containing curing monomer (2) ranging from 75/25 to 99/1. The composition is coated on an optical fiber base and cured by active energy rays to provide a core/clad optical fiber excellent in transparency, mechanical strength, environmental resistance, and optical characteristics.
摘要:
A fluorine-containing aminosulfonate of the general formulaR.sub.f -Q.sub.l -N(R.sub.1)-Q.sub.2 -N(R.sub.2)-Q.sub.3 -SO.sub.3 Mwherein R.sub.f represents a perfluorinated aliphatic group having 3 to 16 carbon atoms; Q.sub.1 represents --CH.sub.2 --.sub.h in which h represents an integer of 1 to 6, --CH.sub.2 CH.sub.2 Z--.sub.i in which Z represents --O-- or --S--, and i represents an integer of 1 to 4, ##STR1## or a combination of these; Q.sub.2 and Q.sub.3 are identical or different and each represents --CH.sub.2 --.sub.j in which j represents an integer of 1 to 6, ##STR2## in which R.sub.3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or ##STR3## M represents a hydrogen atom, an alkali metal atom, an alkaline earth methal atom, or --N(H).sub.m (R.sub.4).sub.n in which R.sub.4 represents an alkyl group having 1 to 3 carbon atoms, and m and n represent 0 or an integer of 1 to 4 provided that m+n=4; R.sub.1 represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms; and R.sub.2 represents a hydrogen atom, an alkyl or hydroxyalkyl group having 1 to 4 carbon atoms, --Q.sub.3 SO.sub.3 M in which Q.sub.3 and M are as defined, or --CH.sub.2 --.sub.k COOM in which M is as defined and k represents an integer of 1 to 4.
摘要:
An active energy ray-curable resin composition which gives a cured product having a refractive index of not more than 1.44 comprises (I) a fluorine-containing polymer composed of (A) and at least one of (B) and (C): (A) a fluorine-containing (meth)acrylate, (B) an alpha,beta-ethylenically unsaturated dicarboxylic acid ester and (C) a mono(meth)acrylate and having a fluorine atom content of at least 30% by weight, (II) a fluorine-containing (meth)acrylate, (III) a mono(meth)acrylate and (IV) a polyfunctional monomer containing at least two (meth)acryloyl groups in the molecule. Optical fibers are produced by coating the above composition on a core material and irradiating active energy rays onto the coating to form a cured cladding of the composition.
摘要:
An aqueous foam fire extinguisher comprising (A) a surface-active agent having an anionic hydrophilic group, (B) a cationic water-soluble polymeric substance, and, optionally, (C) a polybasic acid compound.
摘要:
A curing composition for reinforcing an inorganic oxide material or a flawable base is disclosed. The composition comprises a curing compound emulsified and dispersed in water with or without the aid of an emulsifier or a water-soluble high polymer. The composition has excellent preservation stability and is free from the risk of fire or environmental pollution. The process for reinforcing an inorganic oxide material or a flawable base using the composition is also disclosed.
摘要:
An active energy ray-curable resin composition which gives a cured product having a refractive index of not more than 1.44 comprises (I) a fluorine-containing polymer composed of (A) and at least one of (B) and (C): (A) a fluorine-containing (meth)acrylate, (B) an alpha,beta-ethylenically unsaturated dicarboxylic acid ester and (C) a mono(meth)acrylate and having a fluorine atom content of at least 30% by weight, (II) a fluorine-containing (meth)acrylate, (III) a mono(meth)acrylate and (IV) a polyfunctional monomer containing at least two (meth)acryloyl groups in the molecule. Optical fibers are produced by coating the above composition on a core material and irradiating active energy rays onto the coating to form a cured cladding of the composition.
摘要:
A semiconductor integrated circuit device includes: a protected circuit protected against electro-static discharge applied from outside the device; an SCR protection circuit having an anode terminal connected to a power line, a cathode terminal connected to a ground line and a trigger terminal; and a trigger circuit connected to the trigger terminal and including an RC circuit connected between the power line and the ground line.
摘要:
A semiconductor integrated circuit device includes: a protected circuit protected against electro-static discharge applied from outside the device; an SCR protection circuit having an anode terminal connected to a power line, a cathode terminal connected to a ground line and a trigger terminal; and a trigger circuit connected to the trigger terminal and including an RC circuit connected between the power line and the ground line.