Abstract: A method of increasing the pressure-resistant strength and impart strength of a glass container, which comprises treating the surface of the glass container with a silane coupling agent, applying a coating material comprising a reactive compound having at least two (meth)acryloyl groups in the molecule to the treated glass container, and subjecting it to irradiation of an activated energy ray to cure the coating material applied; and a method of increasing the pressure-resistant strength and impact strength of a glass container, which comprises applying a coating material comprising a silane coupling agent and a reactive compound having at least two (meth)acryloyl groups in the molecule to the surface of the glass article, and then subjecting the coated glass container to irradiation of an activated energy ray to cure the coating.

Abstract: A method of increasing the pressure-resistant strength and impact strength of a glass container, which comprises treating the surface of the glass container with a silane coupling agent, applying a coating material comprising a reactive compound having at least two (meth)acryloyl groups in the molecule to the treated glass container, and subjecting it to irradiation of an activated energy ray to cure the coating material applied; and a method of increasing the pressure-resistant strength and impact strength of a glass container, which comprises applying a coating material comprising a silane coupling agent and a reactive compound having at least two (meth)acryloyl groups in the molecule to the surface of the glass article, and then subjecting the coated glass container to irradiation of an activated energy ray to cure the coating.

Abstract: 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.

Abstract: A light-sensitive composition for use in making a light-sensitive layer of, for instance, a presensitized plate from which a lithographic printing plate is to be prepared, which comprises a fluorine-containing surfactant and is characterized in that the fluorine-containing surfactant is a copolymer of (i) an acrylate or methacrylate having a fluoroaliphatic group, Rf, which has 3 to 20 carbon atoms and at least 40% by weight of fluorine atoms and at least three terminal carbon atoms of which are fully fluorinated; and (ii) a poly(oxyalkylene) (meth)acrylate and that Rf group-containing (meth)acrylate monomer unit is present in the copolymer in an amount of from 25 to 70% by weight based on the total weight of the copolymer. The composition provides a light-sensitive layer of a uniform thickness and it provides a lithographic printing plate having acceptable and excellent properties.

Abstract: 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.

Abstract: 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.

Abstract: A powdery fire-extinguishing agent containing a powder as main ingredient and a powder as adjuvant, both or one of said powders being treated with an organofluorine compound which has a fluoroalkyl group containing 3 to 20 carbon atoms, which has a major transition temperature of 20.degree. C. or higher and a fluorine content of 5% by weight or more, which is insoluble in water and insoluble or sparingly soluble in a combustible liquid, and which has oil repellency; and a process for preparation thereof.