Production of polyamide of high degree of polymerization

Abstract

Abstract PURPOSE:To obtain a polyamide of a high degree of polymerization easily and rapidly, by increasing the MW of an amino group-terminated polyamide by reacting it with a bislactone compound. CONSTITUTION:An amino group-terminated polyamide is reacted by heating with at least either of the bislactones of formulas I and II to increase the MW of the polyamide. In the formulae, D is a tetravalent organic group which makes each of the ring structures five- or six-membered, R1 is H, or a monovalent organic group, R2 is a monovalent organic group, R3 is a bivalent organic group which makes each of the ring structures five- or six-membered, R4 is a bivalent organic group and all of said organic groups are those unreactive with the polyamide. The polyamide used is thermosetting preferably, thermoplastic having a m.p.<=350 deg.C.

Inventors

• 👤 Hiroo Inada
• 👤 稲田　博夫
• 👤 Shigeyoshi Hara
• 👤 原　重義

Bibliographic Details