Method for preparing polyesters having intrachain free acid...

Details Method for preparing polyesters having intrachain free acid... Method for preparing polyesters having intrachain free acid...

2006-08-22

2006-08-22

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S271000, C528S274000, C528S354000

Reexamination Certificate

active

07094862

ABSTRACT:
The invention relates to a method for preparing polyesters A containing several mid-chain free acid functions by ring-opening polymerisation in the presence of a chain initiator: the benzyl diester of the tartaric acid, the phenyl radical of which is optionally substituted. A: aliphatic based on cyclic esters such as lactides and glycolides.

REFERENCES:
patent: 6111033 (2000-08-01), Loughman et al.
patent: 6867181 (2005-03-01), Shalaby et al.
patent: 0035990 (2000-06-01), None
Canessa, et al, “Racemic . . . Dependence”, Polymer Bulletin, vol. 6, 1982, pp. 515-519.
Kuramoto et al, Carboxyl-Containing . . . Polyurethanes, Journal of Applied Polymer Science, vol. 29, 977-983 (1984).

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