Title:
NOVEL HIGH MELTING POINT CRYSTALLINE POLYAMIDE
Document Type and Number:
Japanese Patent JP2534220
Kind Code:
B2
Abstract:
PURPOSE: To provide the titled novel polyamide having a high melting enthalpy, a high melting point and high crystallinity useful for molded articles, extrusion molded articles and so on, which comprises terephthalic acid, naphthalene-2,6- dicarboxylic acid and an aliphatic diamine.
CONSTITUTION: A glass reactor equipped with an anchor type stirrer is purged with nitrogen, into which are introduced terephthalic acid, naphthalene-2,6- dicarboxylic acid and hexamethylenediamine or the like, which are heated up to 360°C in a heating bath to bring about a melt polycondensation reaction for 20 minutes and subsequently the reaction is stopped to obtain the aimed copolyamide having high crystallinity over the whole composition range, a melting enthalpy ΔH of 3.5 cal/g or more and a melting point of TM of 270°C or above comprising 1-99 mol.% of a unit of formula I [wherein R is a carbon chain of the formula (CH2)n, wherein n is 4-20; AR1 is the residue from the condensation of terephthalic acid and/or diester thereof] and 99-1 mol.% of a unit of formula II (wherein AR2 is the residue from the condensation of naphthalene-2,6-dicarboxylic acid and/or diester thereof).
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Inventors:
JANNMARUKU SAAJU
Application Number:
JP16604393A
Publication Date:
September 11, 1996
Filing Date:
June 11, 1993
Export Citation:
Assignee:
ATOCHEM ELF SA
International Classes:
C08G69/26; C08G69/28; C08K3/00; C08K5/00; C08L77/00; C08L77/06; (IPC1-7): C08G69/26; C08G69/28; C08K3/00; C08K5/00; C08L77/06
Domestic Patent References:
| JP6028423A | ||||
| JP3143922A | ||||
| JP61195123A | ||||
| JP5332838B2 |
Attorney, Agent or Firm:
Takashi Koshiba