Phosphazene-containing amine as curing agent for phthalonitrile-

Details Phosphazene-containing amine as curing agent for phthalonitrile- Phosphazene-containing amine as curing agent for phthalonitrile-

1991-03-15

1993-05-04

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528128, 528167, 528169, 528183, 528185, 528188, 528362, 528399, C08G 8300

Patent

active

052083187

ABSTRACT:
Phosphazene-containing amines having at least one amine or substituted amine moiety reactive with nitrile groups of the phthalonitrile monomers or oligomeric resins are useful curing agents for phthalonitriles. Typically, the phosphazene-containing amines useful as curing agents in the present invention have the formula: ##STR1## wherein each of X.sub.1-6 is a hydrogen, an unsubstituted amine group, or an amine group substituted with C.sub.1 -C.sub.12 alkyl groups or aromatic groups, at least one of X.sub.1-6 includes an amine group, and each of R'.sub.1-6 is an alkyl, aromatic, or alkyl-substituted aromatic moiety, or a linear polymer of the phosphazene-based amine monomer. The curing agents enhance the speed of cure and also add flame retardancy to the cured polymers.

REFERENCES:
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patent: 4226801 (1980-10-01), Keller et al.
patent: 4234712 (1980-11-01), Keller et al.
patent: 4238601 (1980-12-01), Keller et al.
patent: 4408035 (1983-10-01), Keller et al.
patent: 5003039 (1991-03-01), Keller et al.
Bis-, Tris-, and Tetrakis-Maleimidophenoxy-Triphenoxycyclotriphosphazene Resins for Fire- and Heat-Resistant Applications, Kumar et al., J of Polymer Science, vol. 21, pp. 3155-3167, 1983.
Fire- and Heat-Resistant Laminating Resins Based on Maleimido-Substituted Aromatic Cyclotriphosphazenes, Kumar et al., Macromolecules, vol. 16, No. 8, 1983.
A Study of Solution Polymerization of Polyphosphazenes, Mujumdar et al., Macormolecules 1990, vol. 23, pp. 14-20.

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