Imide-containing polymers made by bulk polymerization

Details Imide-containing polymers made by bulk polymerization Imide-containing polymers made by bulk polymerization

1998-10-29

2000-05-23

Hampton-Hightower, P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 10, 528 26, 528125, 528128, 528172, 528173, 528179, 528185, 528188, 528220, 528229, 528310, 528322, 528350, 528353, C08G 7310

Patent

active

060667109

ABSTRACT:
Disclosed is a method of making an imide-containing polymer by bulk or melt polymerizing monomers. A mixture is formed of (1) a cyclic compound that contains an anhydride group and a second group which is an anhydride, a carboxylic acid, or an ester and (2) a diamine in an amount stoichiometric .+-.5 mole % of stoichiometric with the amount of cyclic compound. An end capper may also be included in the mixture to control the molecular weight but no solvent is used. A polyimidesiloxane can be made by using a siloxane-containing diamine. The mixture is heated to a temperature above the T.sub.g or T.sub.m of the polymer but below its degradation temperature.

REFERENCES:
patent: 4983690 (1991-01-01), Cameron et al.
patent: 4996101 (1991-02-01), Landis et al.
patent: 5025089 (1991-06-01), Vora et al.
patent: 5026822 (1991-06-01), Vora
An article by Imai et al., titled "Successful Synthesis of a 1:1 Salt Monomer Derived from Bis (4-aminophenyl) Ether and Pyromellitic Acid for Direct Polymerization to an Aromatic Polyimide" in J. Polym--Sci Part A: Polym. Chem. vol. 36 (1998).

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