Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1993-12-22
1995-07-18
Marquis, Malvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525415, 528361, C08G 6308
Patent
active
054342414
ABSTRACT:
This specification provides a biodegradable poly(lactic acid) of a star-shaped structure having a high molecular weight of more than 30,000 with excellent tensile strength and a process for its preparation which comprises direct polycondensation of lactic acid using polyhydroxyl compound having at least four hydroxyl groups.
REFERENCES:
patent: 4273920 (1981-06-01), Nevin
patent: 5225521 (1993-07-01), Spinu
Macromolecules, vol. 5, No. 4, Jul.-Aug. 1972, J. E. L. Roovers, et al., "Preparation and Characterization of Four-Branched Star Polystyrene", pp. 384-388.
Ahn Kwang D.
Han Yang K.
Kim Jeong B.
Kim Soo H.
Kim Young H.
Dodson Shelley A.
Korea Institute of Science and Technology
Marquis Malvyn I.
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