摘要:
A cleaning composition which comprises dimethylcyclooctadienes is disclosed. There is further disclosed a method of cleaning printed circuit boards or printed wiring boards, which comprises: contacting the board with a composition comprising dimethylcyclooctadienes and 2-20% by weight of a surfactant; rinsing the board with water; and drying the board.
摘要:
A cleaning composition which comprises dimethylcyclooctadienes is disclosed. There is further disclosed a method of cleaning printed circuit boards or printed wiring boards, which comprises: contacting the board with a composition comprising dimethylcyclooctadienes and 2-20% by weight of a surfactant; rinsing the board with water; and drying the board.
摘要:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
摘要:
In a method for preparing an adduct of (A) a butadiene lower polymer or butadiene lower copolymer and (B) a .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound, said method is characterized in that said (A) and (B) are caused to react in the presence of one or more compounds selected from (C) p-phenylenediamine derivatives, catechol derivatives, pyrogallol derivatives, N-nitrosamines, quinoline derivatives and naphthol derivatives, thus serious increase of the viscosity of said adduct in the addition reaction can be prevented.
摘要:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
摘要:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
摘要:
A die machine for manufacturing a laminated iron core includes a first working row for punching out iron core pieces from a steel sheet material and a second working row for punching out electrically insulating sheet pieces from an electrically insulating synthetic resin sheet material. Each iron core piece includes a spindle hole and a plurality of slot holes for receiving coil windings. Each electrically insulating sheet includes a spindle hole and a plurality of slot holes which have a substantially similar configuration to, but are smaller than, the slot holes of the iron core pieces. The die machine includes a stacking die mold for selectively receiving the iron core pieces and the electrically insulating sheet pieces such that successive stacks of iron core pieces are sandwiched between electrically insulating sheet pieces.
摘要:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha., .beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
摘要:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.
摘要:
There is disclosed a water-soluble coating composition having excellent properties including corrosion resistance, adhesion, impact resistance and so on. The coating composition comprises an adduct of a butadiene lower polymer or copolymer and .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid compound resulting from the special addition reaction, a hydrophilic solvent and a neutralizer.