High molecular weight stereoregular head-tail...

Details High molecular weight stereoregular head-tail... High molecular weight stereoregular head-tail...

2008-01-01

2008-01-01

Zemel, Irina S (Department: 1711)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S351000, C528S336000, C525S540000, C525S928000, C527S312000

Reexamination Certificate

active

07314906

ABSTRACT:
A method of producing high molecular weight stereoregular head, tail-poly(alkylene D-glucaramides) is described. Amidoamino acids are esterified in cold alcohol and then polymerized in a protic solvent to form steroregular prepolymers. The prepolymers are then further polymerized by dissolving them in a solvent to form larger, purer postpolymers. Compositions of matter prepared using the subject method are also described.

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patent: 5473035 (1995-12-01), Kiely et al.
patent: 5478374 (1995-12-01), Kiely
L. Chen and D.E. Kiely,“Synthesis of Stereoregular Head-Tail Hydroxylated Nylons Derived from D-Glucose”, J. Org. Chemistry, 61, (1996) p. 5847, Birmingham, AL, USA.
F.W. Billmeyer, Jr., “Molecular Weight and Molecular-Weight Distribution”,Textbook of Polymer Science, 3rd ed., p. 274, Wiley-Interscience (1984), New York, NY, USA.
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K. Hashimoto, M. Okada, Naomi Honjou, Ring-opening polyaddition of D-glucaro-1,4:6,3-dilactone with p-zylylenediamine, Macromol. Chem. Rapid Commun., 11, p. 393, (1990), JP.
K. Hashimoto, S. Wilbullucksanakul, M. Matsuura and M. Okada, J. Polym. Sci., Polym. Chem. Ed., 31, 3141 (1993) JP.

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