Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-03-13
1993-08-10
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525415, 528357, C08G 6384, C08G 6391
Patent
active
052350312
ABSTRACT:
A process for polymerizing lactide and up to 20 mole percent of another lactone in the absence of solvent at 100.degree. to 220.degree. C. using an yttrium or lanthanide series rare earth metal catalyst.
REFERENCES:
patent: 3169945 (1965-02-01), Hostettler et al.
patent: 4289873 (1981-09-01), Kubo et al.
patent: 4357462 (1982-11-01), Kubo et al.
patent: 5028667 (1991-07-01), McLain et al.
Polymer Preprints, Japan (English Edition) vol. 40, 5-11, pp. E830 and E831.
Kidorui 1991, 18, 152-153 (Abstract).
Drysdale Neville E.
Ford Thomas M.
McLain Stephan J.
Dodson Shelley A.
E. I. Du Pont de Nemours and Company
Kight III John
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