Toray Industries, Inc.

Tadao Tsutsumi

Hiroshi Ohshita

Masanobu Morikawa

Toshikazu Aoyama

Yoshiyuki Komuro

Nobuo Kato

Eizo Gotah

Kazumi Nagai

Takeshi Tomishima

Method for continuous polycondensation of higher aliphatic .omega.-amino

A process for producing flame retardant polyamide molding resin containing melamine cyanurate which is formed from melamine and cyanuric acid in the molten polyamide and which has a fine crystallite size of less than 250 A. The polyamide molding resin produced by this process provides shaped articles having excellent mechanical properties as well as flame retardant properties without blooming.

Process for producing flame retardant polyamide molding resin containing

A flame retardant polyamide molding resin containing melamine cyanurate is formed from melamine and cyanuric acid in the molten polyamide and has a fine crystallite size of less than 250 A. The polyamide molding resin provides shaped articles having excellent mechanical properties as well as flame retarding properties without blooming.

Flame retardant polyamide molding resin containing melamine cyanurate

Flame-retarding polyamide composition having excellent mechanical and flame retardant properties is disclosed. The composition comprises polyamide, about 3 to 40% by weight of melamine on the basis of the polyamide, and about 0.5 to 20% by weight on the basis of the polyamide and about 2 to 75% by weight on the basis of melamine of a compound represented by a compound selected from the group consisting of the following formulas (I) and (II) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are the same or different radicals selected from the group consisting of hydrogen, alkyl, alicyclic and aromatic radicals having from 1 to 10 carbon atoms, and from such radicals having a substituent selected from the group consisting of --OH, --COOR' and --CONH.sub.2, wherein R' is aliphatic alkyl group having from 1 to 5 carbon atoms.

Flame-retarding polyamide composition

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Nagoya, Japan

Tadao Tsutsumi