Polymerization process and product

Details Polymerization process and product Polymerization process and product

1979-09-12

1981-06-16

Nielsen, Earl A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528354, 528356, 424 19, 424 20, 424 32, 424 78, 1283355, C08G 6306, C08G 6304

Patent

active

042739209

ABSTRACT:
Lactic-glycolic copolymers having molecular weights of about 6000 to about 35000 are prepared by condensation of lactic acid and glycolic acid in the presence of readily removable strong acid ion-exchange resins.

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patent: 3535419 (1970-10-01), Siegrist
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patent: 3887699 (1975-06-01), Yolles
patent: 3991766 (1976-11-01), Schmitt et al.
patent: 4011312 (1977-03-01), Reuter et al.
patent: 4144317 (1979-03-01), Higuchi et al.
"Slow-Release Bolus", p. 11, Oklahoma Farmer-Stockman, Feb. 1979.

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