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Bioerodible polymers for solid controlled release pharmaceutical compositions

  • US 5,461,140 A
  • Filed: 11/15/1993
  • Issued: 10/24/1995
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Fees
First Claim
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1. A method for preparing a bioerodible polymer comprising:

  • reacting a monomeric ortho ester having the general formula ##STR11## wherein R is hydrogen or alkyl of 1 to 10 carbon atoms and R'"'"' is lower alkyl with a triol having the general formula ##STR12## wherein n is 1 to 5 carbon atoms, to form a rigid, bioerodible ortho ester polymer containing mer units of the structure ##STR13##

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