Wire coating composition and process for producing the same
AssigneeBASF Lacke & Farben, AC
InventorsMichael Schink, Geoff Rix, John Kirwin
Life of this patent
Estimating the term…
Abstract
The present invention provides wire-coating compositions comprising polyhydric alcohols which are esterified with naphthalenedicarboxylic acid and/or esterifiable derivatives thereof, optionally in a mixture with further dicarboxylic acids and/or their dicarboxylic acid derivatives, catalysts, organic solvents and additives, and optionally imido-containing and/or imido-forming starting materials. The wire-coating compositions of the invention are stable on storage, have good adhesion, especially to copper wires and have desireable thermal pressure and thermal shock. The compositions also have a high solids content at a viscosity which is favorable for processing.
Claims12
A wire-coating composition, comprising 0.5 to 5.0% by weight, based on the overall weight of the wire-coating composition of a phenolic resin and
- a) from 15 to 65% by weight, based on the overall weight of the wire-coating composition, of one or more polyester resins comprising the reaction product of one or more polyhydric alcohols and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof,
- b) from 15 to 60% by weight, based on the overall weight of the wire-coating composition, of one or more polyesterimides comprising the reaction product of one or more polyhydric alcohols and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof, or
- c) from 18 to 40% by weight, based on the overall weight of the wire-coating composition, of one or more hydroxyl-containing polyesters comprising the reaction product of one or more polyhydric alcohols and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof, and one or more isocyanate components whose free isocyanate groups are completely blocked.
A wire-coating composition, comprising
- a) from 15 to 65% by weight, based on the overall weight of the wire-coating composition, of one or more polyester resins comprising the reaction product of a mixture of diols and triols, wherein at least one triol is tris(2-hydroxyethyl)isocyanurate, and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof,
- b) from 15 to 60% by weight, based on the overall weight of the wire-coating composition, of one or more polyesterimides comprising the reaction product of a mixture of diols and triols wherein at least one triol is tris(2-hydroxyethyl)isocyanurate, and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof, or
- c) from 18 to 40% by weight, based on the overall weight of the wire-coating composition, of one or more hydroxyl-containing polyesters comprising the reaction product of a mixture of diols and triols wherein at least one triol is tris(2-hydroxyethyl)isocyanurate, and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof, and one or more isocyanate components whose free isocyanate groups are completely blocked.
A wire-coating composition, comprising 0.5 to 5.0% by weight, based on the overall weight of the wire-coating composition of a phenolic resin and
- a) from 15 to 65% by weight, based on the overall weight of die wire-coating composition, of one or more polyester resins comprising the reaction product of a mixture of diols and triols, wherein at least one triol is tris(2-hydroxyethyl)isocyanurate, and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof,
- b) from 15 to 60% by weight, based on the overall weight of the wire-coating composition, of one or more polyesterimides comprising the reaction product of a mixture of diols and triols wherein at least one triol is tris(2-hydroxyethyl)isocyanurate, and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof, or
- c) from 18 to 40% by weight, based on the overall weight of the wire-coating composition, of one or more hydroxyl-containing polyesters comprising the reaction product of a mixture of diols and triols wherein at least one triol is tris(2-hydroxyethyl)isocyanurate, and at least one acid component comprising an acid or acid derivative selected from the group consisting of naphthalenedicarboxylic acid, esterifiable derivatives thereof, and mixtures thereof, and one or more isocyanate components whose free isocyanate groups are completely blocked.
Dependencies are inferred from the claim text.