SOLVENTLESS PROCESS FOR PRODUCING TETRACARBOXYLIC ACID DIAMINE SALT

Title:

SOLVENTLESS PROCESS FOR PRODUCING TETRACARBOXYLIC ACID DIAMINE SALT

Document Type and Number:

Japanese Patent JP2001098070

Kind Code:

A

Abstract:

To provide a solventless process for easily producing a tetracarboxylic acid diamine salt being a precursor necessary in producing a polyimide resin applicable to heat-resistant films, etc., through a route of a tetracarboxylic acid diamine salt.

This process comprises mixing under heating a tetracarboxylic acid and/or a tetracarboxylic acid monoanhydride capable of forming two imide rings when cyclized with a diamine without the help of any solvents. In a preferable embodiment, the ratio of the acid component to the diamine component is 0.1-10 by mole.

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Inventors:

YASUDA HIROYUKI
YAMAMORI YOSHIYUKI

Application Number:

JP28044499A

Publication Date:

April 10, 2001

Filing Date:

September 30, 1999

Export Citation:

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Assignee:

SUMITOMO BAKELITE CO

International Classes:

C07C65/05; C07C65/32; C07C213/00; C07C217/90; C07C221/00; C07C225/20; C08G73/10; (IPC1-7): C08G73/10; C07C65/05; C07C213/00; C07C217/90; C07C221/00; C07C225/20

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