Patent GB-816072-A (GB)
Title: Electric conductors coated with modified alkyd resin compositions
IPC: H01B3/42
Filed: 1956-07-25
Abstract: A composition for coating electrical conductors comprises (1) a condensation product of one or more polyhydric alcohols at least one of which is at least trihydric with terephthalic or isophthalic acid or a lower alkyl ester thereof (and if desired a minor proportion of a saturated or unsaturated aliphatic or cycloaliphatic dibasic acid or ester thereof) and (2) from 0.001-3 per cent of titanium added as an alkanol amine titanate; an N-organic salt of an alkanol amine titanate; a compound of formula Ti(OR)4 in which R is a monovalent hydrocarbon radical, an hydroxylated monovalent hydrocarbon radical or an acyl radical of formula -CO.R1, in which R1 is an aliphatic hydrocarbon radical or an hydroxylated aliphatic hydrocarbon radical; or an organic solvent-soluble partial condensate of one of said titanium compounds.  The condensation product may be modified by a fatty acid (or glyceride thereof) and/or an organosilicon compound of formula <FORM:0816072/IV (a)/1> in which R11 is a monovalent hydrocarbon radical, X is a halogen atom, an alkoxy radical, a silicon-bonded hydroxyl radical, an hydroxylated monovalent hydrocarbon radical or a radical of the general formula ZOOCB-, in which Z is hydrogen or a lower alkyl radical and B is a divalent hydrocarbon radical, n has an average value of 1-3 and m has an average value of 0.01-3.  The Specification contains lists of suitable reactants. The titanium compound may be cold blended with the alkyd resin or cooked in at any stage of its manufacture or after the resin has been formed.  The organosilicon compound can similarly be reacted with the alkyd at any stage in its manufacture or after the resin has been formed or it may first be reacted with the polyhydric alcohol and the product reacted with the acid.  The alkyd or modified alkyd may be prepared by polycondensation in presence of isophorone, butyl carbitol acetate, a mixture of isophorone and toluene or a mixture of isophorone, creyslic acid and dimethyl formamide as solvent and magnesium acetate as catalyst.  The alkyd resin may also be modified with phenol-aldehyde resins, polyvinyl acetal resins or epoxy resins.  In examples, wire-enamels comprise a solution in the solvents specified above (with or without alkylated phenols) of (1)-(4) An organo-silicon-modified alkyd prepared from glycerine, ethylene glycol, triethanolamine, dimethyl terephthalate and a partially hydrolysed phenylmethyldimethoxysilane and (1) tetrabutyl titanate, (2) tetraoctyl titanate, (3) a titanate having two octylene glycol units and two butoxy groups, or (4) an orthotitanate having alkylated phenoxy groups; (5), (7), (13) and (14) an alkyd prepared from glycerine, ethylene glycol and dimethyl terephthalate and (5) triethanolamine titanate; (7) a compound of formula <FORM:0816072/IV (a)/2> (13) a triethanolamine-N-stearate titanate or (14) a lactyl butyl titanate; (6) an organo-silicon modified alkyd prepared from glycerine, ethylene glycol, dimethyl terephthalate and phenylmethyldimethoxysilane and a triethanolamine titanate; (8) an alkyd from glycerine and isophthalic acid and tetrabutyl titanate; (9) an alkyd from pentaerythritol, terephthalic acid and linseed oil fatty acid and tetrabutyl titanate; (10) an organo-silicon modified alkyd from glycerine, dimethyl terephthalate and hydroxypropylphenylsiloxane and tetrabutyl titanate; (11) an organo-silicon modified alkyd from glycerine, dimethyl terephthalate and <FORM:0816072/IV (a)/3> and tetrabutyl titanate; (12) An organo-silicon modified alkyd from glycerine, terephthalic acid, linseed oil fatty acid and phenyltriethoxy-silane and tetrabutyl titanate; (15) an organo-silicon modified alkyd from glycerine, terephthalic acid, linseed oil fatty acid and a siloxane copolymer of phenylmethylsiloxane, monophenylsiloxane and monomethylsiloxane plus tetrabutyl titanate.  Specification 715,231 is referred to.