ApplicationNo. 05/877456 filed on 02/13/1978
US Classes:528/272, From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof528/480TREATING POLYMER CONTAINING MATERIAL OR TREATING A SOLID POLYMER OR A RESINIFIABLE INTERMEDIATE CONDENSATION PRODUCT
ExaminersPrimary: Phynes, Lucille M.
Attorney, Agent or Firm
International ClassesC08G 63/00 (20060101)
C08G 63/80 (20060101)
C08G 63/78 (20060101)
AbstractThe invention relates to a process for preparing catalyst-free high molecular weight polyester resin by preparing a low polymer having an intrinsic viscosity of from about 0.1 to 0.4 said low polymer being essentially free of catalyst and polymerizing the low polymer under solid state polymerization conditions to form high molecular weight polyester.