Ionically cross-linkable polyphosphazene: poly(bis(carboxylatoph

Details Ionically cross-linkable polyphosphazene: poly(bis(carboxylatoph Ionically cross-linkable polyphosphazene: poly(bis(carboxylatoph

1990-01-19

1991-10-01

Shah, Mukund J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524606, 524608, 558157, 528271, 528168, 528169, C08G 7904

Patent

active

050534513

ABSTRACT:
Hexachlorocyclotriphosphazene and poly(dichlorophosphazene) react with the sodium salt of ethyl p-hydroxybenzoate to give small molecule cyclic and high polymeric phosphazenes with aryloxy ester side groups; reaction of these compounds with potassium tert-butoxide brings about complete hydrolysis of the ester groups to yielding aqueous media-soluble, carboxylic acid bearing cyclic and high polymeric phosphazenes; the carboxylic acid bearing high polymer formed ionic cross-links when treated in aqueous media with salts of di- or trivalent cations yield hydrogels and membranes. The cross-linked gels were stable in neutral or strongly acidic aqueous media, but the cross-linking process was reversed in basic aqueous solutions of excess monovalent cations.

REFERENCES:
patent: 4387208 (1983-06-01), Allcock et al.
Allcock, H. R., Chem. Eng. News 63:22 (1985).
Allcock, H. R. et al., Macromolecules, vol. 13, No. 6, pp. 1325-1329 (1988).

Affiliated with

Also associated with

Rating

Ionically cross-linkable polyphosphazene: poly(bis(carboxylatoph does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ionically cross-linkable polyphosphazene: poly(bis(carboxylatoph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionically cross-linkable polyphosphazene: poly(bis(carboxylatoph will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1755490