摘要:
A process for preparing a through-hole printed circuit board having at least one through-hole, involves the steps of: (a) applying an acid-soluble cationic electrodeposit photoresist by electrodeposition all over on a surface of a board covered by an electrically conductive metal layer including the through-hole, while setting the board as a cathode; (b) heating the board passed through the step (a) to a tempeature of 50°C to 120°C; (c) exposing the acid-soluble cationic electrodeposit photoresist to light through a photo-mask having a pattern complementary to a pattern of a circuit to be formed, thereby to cure the photoresist, and then developing with a developer to remove only an uncured portion of the photoresist; (d) applying an alkali-soluble anionic electrodeposit etching resist by electrodeposition on a surface of a portion of the electrically conductive metal layer uncoated with the cured photoresist, while setting the board passed through the step (c) as an anode; (e) heating the board passed through the step (d) to a tempeature of 50 to 120°C; (f) removing a coating of the cured acid-soluble cationic electrodeposit photoresist with an aqueous acid solution; (g) etching a portion of the electrically conductive metal layer exposed by the step (f); and (h) removing the remaining alkali-soluble anionic electrodeposit etching resist with an aqueous alkali solution.
摘要:
1. A resin composition for forming a durable protection coating contains (A) an alkali-soluble resin which is a polymer of a conjugated diene and has a monoamidated succinic acid group represented by the following formula (I) of: wherein R¹ and R² each stand for a hydrogen atom, a halogen atom or an organic residue having 1 to 3 carbon atoms; and R³ stands for an organic residue having 1 to 16 carbon atoms; (B) a pre-polymer having a photosensitive ethylenic double bond; and (C) a photo polymerization initiator. The mixing ratio by weight of the alkali-soluble resin (A) to the pre-polymer (B) ranges from 1:4 to 4:1. A process for preparing the durable protection coating contains applying the resin composition on a substrate, and exposing the resin composition to ultraviolet ray through a circuit pattern mask to cure the resin composition followed by development and after-curing to form the protection coating.
摘要:
The present invention relates to a process for producing butadiene oligomer adducts of (A) a butadiene oligomer or co-oligomer prepared from a monomer, selected from conjugated diolefins and vinyl-substituted aromatic compounds, and butadiene with (B) an ethylene-α, β-dicarboxyl compound, characterized by heating (A) said butadiene oligomer or co-oligomer with (B) said compound at a temperature of 120 - 220°C in the presence of 0.005 - 5% by weight of trimethylhydroquinone based on an amount of (A).
摘要:
A random copolymer comprises recurring units each having the formula of; wherein R¹ to R¹⁰ stand for a hydrogen atom or an alkyl group with or without R⁵ being bonded to R⁶ or R¹⁰ via an alkylene group having 1 to 3 carbon atoms. The random copolymer contains 50 to 90 mol % of ethylene. The random copolymer has an intrinsic viscosity [η] of 0.3 to 10 dl/g measured in decalin at 30°C.
摘要:
The present invention provides a high-density fuel oil which is suitable for rockets and jet engines and which mainly comprises a tetracyclo (7.3.1. 0 2,7 . 1 7,11 ) tetradecane deriva- t i ve represented by the general formula: wherein each of m and n is 0,1 or 2, and the sum of m and n is 2 or less.
摘要:
A method for preparing a substrate having a light-shielding layer involves forming a photosensitive coating film on a transparent electrically conductive layer formed on a transparent substrate, exposing the photosensitive coating film via a mask exhibiting light transmitting properties, removing and developing the coating film for exposing the transparent electrically conductive layer and electrodepositing a dark-hued coating on the exposed transparent electrically conductive layer for forming the light-shielding layer, and heating the light-shielding layer. The substrate having the light-shielding layer has a volume resistivity of 1 × 10² ohm·cm or higher and may be used for a counterelectrode substrate for a TFT array substrate incorporated in a liquid crystal display device.
摘要:
A process for producing oxazolone derivatives, usable as important starting materials for medicines and pesticides, of the following general formula (III) by reacting a compound of the general formula (I) with a compound of the general formula (II) in the presence of an aliphatic tertiary amine: wherein Ar represents an aromatic hydrocarbon residue, R¹ , R², R³ and R⁴ each represent a hydrogen atom, a halogen atom or an organic residue, R⁵ represents a hydrocarbon residue and X represents a halogen atom.
摘要:
A traction drive fluid comprising as a base stock at least one hydrocarbon selected from the group consisting of compounds of the following general formulae (I) to (V) wherein R 1 , R 2 and R 3 , independently from each other, represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 , independently from each other, represent a hydrogen atom or a methyl group.
摘要:
The present invention provides a high-density fuel oil which is suitable for rockets and jet engines and which mainly comprises a tetracyclo (7.3.1. 0 2,7 . 1 7,11 ) tetradecane deriva- t i ve represented by the general formula: wherein each of m and n is 0,1 or 2, and the sum of m and n is 2 or less.