Eco-friendly solderable wire enamel

摘要

Described is a polyurethane wire enamel composed of at least one blocked polyisocyanate adduct, blocked with alkylphenols, at least one hydroxy polyester comprising ester and/or imide and/or amide groups, at least one hydrocarbon-based organic solvent, and further auxiliaries and additives.

主权项

1. A polyurethane wire enamel, wherein the enamel is present in cresol-free solution and is composed of:
(A) from 10% to 60% by weight of at least one polyisocyanate adduct blocked with one or more alkylphenols which comprise a mixture of sec-butylphenols, (B) from 4% to 30% by weight of at least one hydroxy polyester optionally comprising at least one of imide groups and amide groups; (C) from 20% to 70% by weight of one or more hydrocarbon-based organic solvents which are composed exclusively of carbon and hydrogen, (D) from 1% to 20% by weight of one or more auxiliaries and additives,the sum of (A)+(B)+(C)+(D) being 100% by weight.