Patent GB-854381-A (GB)
Title: Treating hydrophobic textile materials
IPC: D06M15/579
Filed: 1957-03-25
Abstract: A water-soluble basic linear polyamide made from a dicarboxylic acid and a polyamine containing 2 primary amino groups and at least one secondary or tertiary amino group having repetitive groups of the formula <FORM:0854381/IV(a)/1> where R is hydrogen or an alkyl or aralkyl group, R1 is a covalent bond or a substituted or unsubstituted aliphatic, aromatic or alkyl aromatic radical, K is an integer from 1 to 4 and n is an integer from 2 to 8 is reacted whilst impregnated in a hydrophobic textile material with a diester alkylating agent capable of cross-linking and insolubilising said polyamide to form a quaternary ammonium compound containing groups having the formula:  <FORM:0854381/IV(a)/2> where R11 is a substituted or unsubstituted aliphatic or alkyl aromatic radical and A is an anion.  Specified dicarboxylic acids are adipic, succinic, dimeric fatty, terephthalic, diglycollic, sebacic, oxalic, azelaic and dodecenyl succinic acid. Amines specified are N-methyl-N, bis-(3-aminopropyl) amine, imino-bis-propylamine, diethylene triamine, triethylene tetramine and dipropylene triamine.  Diester alkylating agents specified are xylylene dichloride, dimethyl xylylene dichloride, epichlorohydrin, glycerol dichlorohydrin and polyethylene glycol dihalides.  The examples describe the production of polyamides from: (1) dimethyl adipate and N-methyl-N,-bis (3-aminopropyl) amine, the product being esterified with benzyl chloride or xylylene dichloride, (2) dimethyl terephthalate and N-methyl-N-bis-(3-aminopropyl) amine, (3) adipic and diethylene triamine, (5) dodecenyl succinic anhydride and diethylene triamine, (6) dimethyl sebacate and diethylene triamine, (7) azelaic acid and diethylene triamine and (8) dimethyl adipate and bis (3-aminopropyl) amine, whilst in Examples (9) to (12):-(9) nylon taffeta fabric is impregnated with a solution in isopropyl alcohol of the unesterified product of Example 1 and dimethyl xylylene dichloride and the resin cured, (10) "Dacron" (Registered Trade Mark) taffeta fabric is impregnated with a solution in water of the unesterified product of Example 1 and I(CH2CH2O)12CH2CH2I and the resin cured, (11) nylon taffeta fabric is impregnated with an emulsion of the product of Example (6), dichlorodimethyl xylylene, xylene and a reaction product of ethylene oxide and nonyl phenol and the resin cured and (12) Dacron taffeta fabric is impregnated with a solution in water of the product of example 3 and I(CH2CH2O)12CH2CH2I an the resin cured.ALSO:A process for imparting a durable finish to hydrophobic textile materials comprises impregnating the materials with (a) a solution of a water-soluble linear basic polyamide made from a dicarboxylic acid and a polyamine containing 2 primary amino groups and at least one secondary or tertiary amino group, and having repetitive groups of the structure:  <FORM:0854381/IV (c)/1> where R is hydrogen or an alkyl or aralkyl group, R1 is a covalent bond or a substituted or unsubstituted aliphatic, aromatic or alkyl aromatic radical, K is an integer from 1 to 4 and n is an integer from 2 to 8, and (b) a diester alkylating agent capable of cross-linking and insolubilising the polyamide; the impregnated material is then dried and cured to form an antistatic finish consisting of a cross-linked water insoluble polyamido polyquaternary ammonium compound containing groups having the formula:  <FORM:0854381/IV (c)/2> where R11 is a substituted or unsubstituted aliphatic or alkyl aromatic radical and A is an anion.  Specified synthetic hydrophobic fibres are nylon, polyacrylonitrile, polyesters, cellulose triacetate and acrylonitrile-vinyl chloride copolymers. Examples 9 to 12 describe the application of the process to nylon and polyester fabrics.