Polymers and copolymers originating from the addition of oligome

Details Polymers and copolymers originating from the addition of oligome Polymers and copolymers originating from the addition of oligome

1993-07-23

1997-09-09

Seidleck, James J.

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

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528172, 528173, 528179, 528180, 528181, 528182, 528186, 528187, 528208, 528229, 528340, 528352, 528343, 528342, C08G 7300, C08G 6300

Patent

active

056658559

ABSTRACT:
Disclosed are polymers and copolymers containing at least one repeating unit of the formula ##STR1## in which X is O or NH; R is a single bond or a hydrocarbon chain; R' is a hydrocarbon chain containing one or two carbon atoms, and P is the residue of an oligomer HX--P--XH whose solution viscosity determined in meta-cresol at 30.degree. C. at concentrations of 0.5 g/dl is lower than 0.50 dl/g.sup.-1. Also disclosed is a process for obtaining the polymers and copolymers.

REFERENCES:
patent: 3674741 (1972-07-01), Shunichiro et al.
Journal of Applied Polymer Science, vol. 34, No. 8, Dec., 1987, "Chain Extenders for Polyesters. VI, Properties of the Polyesters Chain-Extended by 2,2'-Bis(4H-3,1-Benzoxazin-4-one)", Inata et al, pp. 2769-2776.

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