Products containing polymer chains, the preparation and use ther

Details Products containing polymer chains, the preparation and use ther Products containing polymer chains, the preparation and use ther

1982-02-02

1983-12-06

Schofer, Joseph L.

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...

524565, 524571, 524577, 524580, 5253289, 5253291, 5253293, 5253306, 5253331, 5253332, 5253333, 5253337, 525343, 525360, 525370, 525409, 525474, 525475, C08K 501

Patent

active

044194820

ABSTRACT:
The invention relates to a process for preparing products containing polymer chains in which a linear prepolymer or polymer contains at least one free acid group at each chain and is reacted with an alkoxide of a metal having a valence of more than 2, such as zirconium, titanium or cerium, possibly in the presence of a non polar solvent, the alkoxide of the metal having a valence of more than 2 being used in such a quantity that the alkoxide functions are in excess with respect to the stoichiometric amount of the acid functions carried by said linear prepolymer or polymer, the reaction mixture being stirred in the presence of humidity until a product is obtained wherein the hydrogen atoms of the free acid end groups of the prepolymer or polymer are substituted by an atom of the metal (M) which is itself linked to another atom of said metal by M-O-M linkages. The invention relates also to the products containing a prepolymer or polymer .alpha.,.omega.-diacid in which the hydrogen atoms of the free acid end groups of the prepolymer or polymer are substituted by an atom of the metal (M) which is itself linked to another atom of said metal by M-O-M linkages, said products being in the form of homogeneous gels in a non polar solvent such as toluene.

REFERENCES:
patent: 4005247 (1977-01-01), Graham
patent: 4185051 (1980-01-01), McKenna, Jr. et al.
patent: 4292231 (1981-09-01), Gabriel et al.

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