Abstract
AbstractCopolyamides based on ε‐caprolactam and AH salt were prepared by copolymerization of various combinations of ε‐caprolactam and AH salt in the presence of a cationic resin. In terms of adhesivity towards metals they have proved their superiority over nylon 6, nylon 6, 6, and the copolyamides of ε‐caprolactam and AH salt, prepared in presence of water. Adhesive property of the copolyamide was found to be increased with increasing proportion of AH salt in the combinations. ε‐Caprolactam (1 part) and AH salt (5 parts) in presence of a cationic resin (0.55%) were copolymerized to give a best performing copolyamide: yield 93%, mp 232°C, relative viscosity 2.42, and shear tensile strength 620 kg/in.2
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