Abstract: The present invention provides a visible laser-curable photosensitive composition wherein a photocuring resin having photosensitive group which is crosslinkable or polymerizable upon light exposure, is mixed with a photopolymerization inititor system consisting of a coumarin type pigment of particular structure and a titanocene compound. This composition has an unexpectedly high sensitivity to visible laser.

Abstract: The present invention provides a visible laser-curable resist composition which contains at least one radical-protecting compound selected from a phosphorous acid ester compound and an aromatic compound having N,N-dimethylamino group bonded to the carbon atom forming the aromatic ring and which is free from the hindrance of curing caused by deactivation of radical by oxygen and has excellent curability, and a process for formation of a resist pattern using the above composition.

Abstract: The present invention provides a visible laser-curable photosensitive composition wherein a photocuring resin having photosensitive group which is crosslinkable or polymerizable upon light exposure, is mixed with a photopolymerization inititor system consisting of a coumarin type pigment of particular structure and a titanocene compound. This composition has an unexpectedly high sensitivity to visible laser.

Abstract: A positive type anionic electrodeposition photoresist composition comprising, as a main component, a dispersion obtained by neutralizing, with a base, a mixture comprising:(A) an acrylic resin containing carboxyl group(s) and hydroxyl group(s),(B) a vinylphenol resin containing a hydroxystyrene unit in an amount of at least 25% by weight based on the resin, and(C) an ester between a polyhydroxybenzophenone and 1,2-naphthoquinone diazide sulfonic acid or benzoquinone diazide sulfonic acid, and dispersing the resulting neutralization product in water.This composition is superior in running stability during electrodeposition and is useful for formation of highly reliable resist pattern or conductor pattern.

Abstract: The present invention provides a process for producing a high-density printed wiring board with plated throughholes, at high productivity and reliability by a direct drawing method.

Abstract: An electromagnetic wave reflection-preventing material having a structure formed by successively laminating (A) an electromagnetic have reflecting metallic material layer, if needed, (B) a substrate layer, (C) a resin layer containing a powder of at least one selected from ferrite, carbon, metal powder and an electrically conductive metallic oxide, and, if needed, a good dielectric material, if needed, (D) a supporting film layer, and (E) a pattern coating layer prepared in the form of a geometrical pattern, containing a metal powder and having a volume resistivity of 10.sup.-3 to 10.sup.10 .OMEGA..multidot.

Abstract: An electromagnetic wave reflection-preventing material having a structure formed by successively laminating (A) an electromagnetic wave reflecting material layer, if needed, (B) a supporting layer, (C) a resin layer, if needed, (D) a supporting layer, and (E) a metallic pattern layer prepared by arranging at least one of a pattern unit comprising a geometrical pattern formed by use of a continuous metallic band, or comprising a multi-figured structure formed by combining a plurality of band-shaped metallic figures so as not to contact with each other; and an electromagnetic wave reflection-preventing method by use of the electromagnetic wave reflection-preventing material.

Abstract: An electromagnetic wave reflection-preventing material having a structure formed by a process which comprises successively laminating (A) a pattern layer formed in the form of a geometrical pattern having a volume resistivity of 10.sup.3 .OMEGA. .

Abstract: An electromagnetic wave absorber comprising at least one of a unit film as a multilayered film comprising a resin layer (A) optionally containing a pigment and a layer (B) applied onto the resin layer (A), selected from a group consisting of a metal layer, an alloy layer and a partly oxidized layer of the metal layer or the alloy layer, and having a film thickness of 1 nm to 50 nm.

Abstract: The invention provides a film-formable, chelate-forming resin having, per 1000 g of the resin, about 0.2 to about 3.5 moles of chelate-forming group represented by the formula [1], [2], [3] or [4]: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each represents a hydrogen atom, a halogen atom, a nitro group, a nitroso group, a cyano group, a hydrocarbon group having up to 18 carbon atoms, or an alkoxyalkyl group having up to 12 carbon atoms, and a process for preparing the resin.The invention also provides a metal surface treating composition and a corrosion preventive coating composition both containing the above chelate-forming resin, and a chelate-forming resin composition comprising the resin and a crosslinking agent.

Abstract: The invention provides a method for forming a pattern coating, the method including the steps of:applying to a substrate a radiation curable composition containing a resin (a) which contains, per kilogram of said resin (a) about 1.5 to about 4.5 moles of a polyermizable unsaturated group, about 0.4 to about 2.5 moles of a carboxyl group and 0.2 to about 3.5 moles of a thioether group, the resin having a number average molecular weight of about 500 to about 50,000; selectively irradiating a portion of the applied coating with actinic rays; and subjecting the coating to development with an alkali aqueous solution.

Abstract: A corrosion preventive resin having in the molecule at least one chelate forming group selected from among groups represented by the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are each a hydrogen atom or alkyl having 1 to 8 carbon atoms, and groups represented by teh general formula ##STR2## wherein R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are the same or different and are each a hydrogen atom, alkyl having 1 to 8 carbon atoms or a group forming a bivalent o-phenylene group along with two carbon atoms attached thereto. A photopolymerizable composition which includes (a) a resin having in the molecule at least one mole of polymerizable double bond per 1000 g of the resin and having per molecule at least one chelate forming group selected from among the groups represented by formula (II) and formula (III), and (b) a photopolymerization initiator is also disclosed.

Abstract: This invention provides:(A) an anti-icing composition comprising a silicone resin which is at least one condensate selected from the group consisting of:(i) a condensate of an alkoxydimethylsiloxane compound represented by the formula ##STR1## wherein R.sub.1 l is a methyl group or an ethyl group, A is an oxygen atom, an ethylene group or a 1,3-propylene group, a is an integer of 5 to 150, b and e are different or the same and each represent an integer of 1 to 3, c is an integer of 3-b and d is an integer of 3-e,(ii) a condensate of the compound of the formula (I) and an alkoxysilane compound represented by the formula(R.sub.3)h--Si--(OR.sub.2)j (II)wherein R.sub.2 is a methyl group or an ethyl group, R.sub.

Abstract: A water-repellant film-forming composition comprisinga mixture of(a) a (co)polymer of 5 to 100% by weight of a specific fluoroalkyl group-containing (meth)acrylic monomer and 0 to 95% by weight of an unsaturated monomer co-polymerizable with the fluoroalkyl group-containing (meth)acrylic monomer, and(b) a copolymer of 0.1 to 75% by weight of a specific silicon-containing polymerizable unsaturated monomer and 25 to 99.9% by weight of an unsaturated monomer copolymerizalbe with the silicon-containing polymerizable unsaturated monomer, andfine silica particles having an average particle diameter of not more than 5 micrometers, in specified amounts.

Abstract: According to one of the two aspects of the present invention, a metal surface treatment liquid having pH of less than 6 and containing oxytitanic ion and/or peroxytitanic ion therein is provided. The second aspect of the present invention is to provide a rust preventive paint, in which oxytitanic ion and/or peroxytitanic ion is(are) contained.

Abstract: An inorganic film forming composition used for forming noncombustible coating films which have good adhesiveness and various other excellent properties. The composition comprises: colloidal silica dispersion, water-soluble organic amines, powdery aluminium compounds and powdery glasses and further may comprise water-soluble amino acids, thiourea, urea and water soluble salts of transition metals such as Cr, Mo, W, Fe, Co, Mn, V, etc. for forming a vehicle.

Abstract: Inorganic anticorrosive coating material which forms excellent coating film having several good properties of hardness, water resistance, anticorrosiveness, drying property and so forth. The coating material is prepared by the steps of: mixing an aqueous solution of water soluble silicate and one member or a mixture of vanadium and vanadium compounds; causing thus obtained mixture to react at the room temperature or by heating to form an aqueous solution of modified water soluble silicate; and dispersing anticorrosive metallic powder into said aqueous solution of modified water soluble silicate.