Process for producing flyback transformer
AssigneeHitachi Chemical Company, Ltd.
InventorsMitsuo Obara, Akira Kageyama, Isao Uchigasaki
Life of this patent
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Abstract
Flyback transformers having good adhesiveness, crack resistance, arc resistance, without producing corona discharge can be produced by insulation treating flyback transformers with a low-shrinkage resin composition comprising (a) an unsaturated polyester produced by reacting partially esterified dicyclopentadiene carboxylic acid, which has been obtained by reacting dicyclopentadiene or hydroxylated dicyclopentadiene, and maleic acid or anhydride, with one or more polyhydric alcohols, (b) a monomer having a vinyl group and (c) a low-shrinkage agent.
Claims7
A process for producing a flyback transformer which comprises insulatin treating the flyback transformer with a low-shrinkage resin composition comprising:
- (a) a polyester produced by an addition-condensation reaction of a partially esterified dicyclopentadiene carboxylic acid obtained by reacting one of the following reactant groups (1) to (3) at 150.degree. C. or lower:
- (1) dicyclopentadiene and maleic acid,
- (2) dicyclopentadiene, maleic acid and water, or
- (3) hydroxylated dicyclopentadiene and maleic anhydride,
- with one or more polyhydric alcohols,
- (b) a monomer having one or more vinyl groups, and
- (c) a low-shrinkage agent.
A flyback transformer insulation treated with a low-shrinkage resin composition comprising:
- (a) a polyester produced by an addition-condensation reaction of a partially esterified dicyclopentadiene carboxylic acid obtained by reacting one of the following reactant groups (1) to (3) at 150.degree. C. or lower;
- (1) dicyclopentadiene and maleic acid,
- (2) dicyclopentadiene, maleic acid and water, or
- (3) hydroxylated dicyclopentadiene and maleic anhydride,
- with one or more polyhydric alcohols,
- (b) a monomer having one or more vinyl groups, and
- (c) a low-shrinkage agent.
Dependencies are inferred from the claim text.