Method of producing electrically insulating, highly flexible and/or solderable coatings
First Claim
1. A method of producing electrically insulating highly flexible and/or solderable coatings on electrical conductors or fibre materials which comprise(A) coating said conductor or fibre material with a solution comprising:
- (i) isocyanates masked with compounds having reactive hydrogen atoms in the molecule and selected from the group consisting of acid amides having 1 or 2 amide hydrogen atoms, hydroxylamine, reaction products of hydroxylamine with carbonyl compounds, imines having an imine hydrogen atom, and lactams with melting or sublimation points below 25°
C.;
(ii) polyester resins and modified polyester resins selected from the group consisting of imide-modifed polyester resins, amide-modified polyester resins and mixtures thereof, said polyester resins and modified polyester resins having a content of terminal hydroxyl groups of from 1 to 16% by weight and being derived from compounds selected from the group consisting of polyhydric alcohols, aliphatic carboxylic acids, polybasic carboxylic acids having carboxyl groups bonded to an aromatic ring, and amino group containing compounds; and
(iii) solvents having from 1 to 10 carbon atoms, a boiling point of at most 250°
C. and being selected from the group consisting of araliphatic ketones, aliphatic ketones, araliphatic alcohols, aliphatic alcohols, ether oxygen-containing araliphatic alcohols, ether oxygen-containing aliphatic alcohols, aliphatic keto-alcohols, araliphatic keto-alcohols, esterified aliphatic alcohols, and esterified aliphatic alcohols, and(B) heating to a working temperature of above 140°
C.
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Abstract
A method of producing electrically insulating highly flexible and/or solderable coatings on electrical conductors or fibre materials which comprises
(A) coating on said conductor or fibre material with a solution comprising:
(i) isocyanates masked with compounds having reactive hydrogen atoms in the molecule and selected from the group consisting of acid amides having 1 or 2 amide hydrogen atoms, hydroxylamine, reaction products of hydroxylamine with carbonyl compounds, imines having an imine hydrogen atom, and lactams with melting or sublimation points below 25° C.;
(ii) polyester resins and modified polyester resin selected from the group consisting of imide-modified polyester resins, amide-modified polyester resins and mixtures thereof said polyester resins and modified polyester resins having a content of terminal hydroxyl groups of from 1 to 16% by weight and being derived from compounds selected from the group consisting of polyhydric alcohols, aliphatic carboxylic acids, polybasic carboxylic acids having carboxyl groups bonded to an aromatic ring, and amino group containing compounds; and
(iii) solvents having from 1 to 10 carbon atoms, a boiling point of at most 250° C. and being selected from the group consisting of araliphatic ketones; aliphatic ketones, araliphatic alcohols, aliphatic alcohols, ether oxygen containing araliphatic alcohols, ether oxygen-containing aliphatic alcohols, aliphatic keto-alcohols, araliphatic keto-alcohols, esterified aliphatic alcohols, and esterified araliphatic alcohols; and
(B) heating to a working temperature of above 140° C., and solutions for use in this method.
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Citations
10 Claims
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1. A method of producing electrically insulating highly flexible and/or solderable coatings on electrical conductors or fibre materials which comprise
(A) coating said conductor or fibre material with a solution comprising: -
(i) isocyanates masked with compounds having reactive hydrogen atoms in the molecule and selected from the group consisting of acid amides having 1 or 2 amide hydrogen atoms, hydroxylamine, reaction products of hydroxylamine with carbonyl compounds, imines having an imine hydrogen atom, and lactams with melting or sublimation points below 25°
C.;(ii) polyester resins and modified polyester resins selected from the group consisting of imide-modifed polyester resins, amide-modified polyester resins and mixtures thereof, said polyester resins and modified polyester resins having a content of terminal hydroxyl groups of from 1 to 16% by weight and being derived from compounds selected from the group consisting of polyhydric alcohols, aliphatic carboxylic acids, polybasic carboxylic acids having carboxyl groups bonded to an aromatic ring, and amino group containing compounds; and (iii) solvents having from 1 to 10 carbon atoms, a boiling point of at most 250°
C. and being selected from the group consisting of araliphatic ketones, aliphatic ketones, araliphatic alcohols, aliphatic alcohols, ether oxygen-containing araliphatic alcohols, ether oxygen-containing aliphatic alcohols, aliphatic keto-alcohols, araliphatic keto-alcohols, esterified aliphatic alcohols, and esterified aliphatic alcohols, and(B) heating to a working temperature of above 140°
C. - View Dependent Claims (2, 3, 4, 5)
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6. A solution for the production of electrically insulating highly flexible and/or solderable coatings on electric conductors or fibre materials, said solution comprising:
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(i) isocyanates masked with compunds having reactive hydrogen atoms in the molecule and selected from the group consisting of acid amides having 1 to 2 amide hydrogen atoms, hydroxylamine, reaction products of hydroxylamine with carbonyl compounds, imines having an imine hydrogen atom, and lactams with melting or sublimation points below 25°
C.;(ii) polyester resins and modified polyester resins selected from the group consisting of imide-modified polyester resins, amide-modified polyester resins and, mixtures thereof, said polyester resins and modified polyester resins having a content of terminal hydroxyl groups of from 1 to 16% by weight and being derived from compounds selected from the group consisting of polyhydric alcohols, aliphatic carboxylic acids, polybasic carboxylic acids having carboxyl groups bonded to an aromatic ring, and amino group containing compounds; and (iii) solvents having from 1 to 10 carbon atoms, a boiling point of at most 250°
C. and being selected from the group consisting of araliphatic ketones, aliphatic ketones, araliphatic alcohols, aliphatic alcohols, ether oxygen-containing araliphatic alcohols, ether oxygen-containing aliphatic alcohols, araliphatic ketoalcohols, esterified aliphatic alcohols, and esterified araliphatic alcohols. - View Dependent Claims (7, 8, 9, 10)
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Specification