Polymers from ethylenically unsaturated monomers, cross-linked by a substituted divinylazobenzene are useful as pharmaceutical compositions for the delivery of medicaments. The polymers are degraded by the enzymes of the upper gastrointestinal tract or are transferred intact past the upper gastrointestinal tract, to deliver the medicament to the large intestine. In particular, the polymers contain divinylazobenzene compounds of the formulae ##STR1## wherein R1 and R2 are independently selected from the group consisting of H, (except that R1 and R2 are not both H), Cl, Br, I, NO2, NH2, RO, ArO, COOH or salts thereof, COOR, COOAr, CHO, COR, SO3 H or salts thereof, R or Ar and wherein R is alkyl of up to 18 carbon atoms and Ar is mono- or bicyclic aryl of up to 15 carbon atoms.

Document Type


Primary Class


Secondary Class

514/5.9; 514/10.3; 514/11.6; 514/54; 514/56; 514/150; 514/151; 514/568; 514/772; 514/778; 514/960; 514/961; 514/962; 514/963; 514/964; 534/573; 534/843; 534/DIG.3

Application Number


Filing Date

August 1988

Patent Number



Medical College of Ohio; Bowling Green State University

Publication Date


Patent Country





The University of Toledo


University of Toledo Libraries

Digital Publisher

Digital Initiatives


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Rights Statement

Rights Statement

No Copyright - United States. URI: http://rightsstatements.org/vocab/NoC-US/1.0/
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