New polyester-containing compositions

摘要

Compositions comprise (A) a major portion of a linear polyester derived from an aromatic carboxylic acid or an ester-forming derivative thereof and an aliphatic or cycloaliphatic diol and (B) a minor portion of a mixture of (1) a linear polyamide or copolyamide and (ii) not more than an equal weight of a linear copolyamide of which 5-35% consists of units of the formula in which A and B are CO or NH and M is an alkali metal. The dicarboxylic acid or ester may be of formula R1OCO(CH2)mAr(CH2)nCOOR2 in which R1, R2 are H or alkyl of 1-10 carbon atoms and m, n are integers from 0 to 4. Polyethyleneterephthalat is specified as a polyester. Polyamide (i) may be polycaprolactam, polyhexamethylene adipamide or a copolymer derived from hexamethylenediamine adipate and hexamethylene diamine sebacate or caprolactam. Copolyamide (ii) may constitute 10-45% of (B). It may be derived from hexamethylene diamine m-(sodium or potassium sulpho) isophthalate and hexamethylene diamine adipate or isophthalate. The products may be made into yarns, fibres or films and may be dyed.ALSO:A polyester composition of improved dyeability comprises (A) a major portion of a linear polyester derived from an aromatic dicarboxylic acid or an ester-forming derivative thereof and an aliphatic or cycloaliphatic diol and (B) a minor portion of a mixture of (i) a linear polyamide or copolyamide and (ii) not more than an equal weight of a linear copolyamide of which 5-35% consists of units of the formula:- in which A and B are CO or NH and M is an alkali metal. The dicarboxylic acid may be of formula: HOCO-(CH2)m Ar(CH2)n COOH in which m and n = 0-4. The polyamide (i) may be polycaprolactam, polyhexamethylene adipamide or a copolymer derived from hexamethylene diamine, adipic acid and sebacic acid or caprolactam. The copolyamide may constitute 10-45% of (B) and may be derived from the Na or K salts of the sulphonic acid with hexamethylene adipamide or isophthalamide. The products have an affinity for acidic, basic, metallic and dispersed dyes. In examples such compositions are dyed with Basacryl Basic Blue(1), Basacryl Blue(2, 3), Cibalane Blue(3), Acilane Blue(3) and Latyl Blue (4).