Stock material or miscellaneous articles – Web or sheet containing structurally defined element or...
Patent
1996-06-20
1997-11-18
Acquah, Samuel A.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
528272, 525437, 525446, 525450, 428221, 428364, B32B 0000, C08F 2000
Patent
active
056885865
ABSTRACT:
The invention provides poly(ethylene oxalate) containing recurring units represented by the following formula (1): ##STR1## in a proportion of at least 60 basal mol %, wherein (a) the solution viscosity (.eta..sub.inh) is at least 0.25 dl/g as measured at 30.degree. C. and a polymer concentration of 0.40 g/dl in a 4:1 (by weight) mixed solvent of m-chlorophenol and 1,2,4-trichloro-benzene,
REFERENCES:
patent: 3197445 (1965-07-01), Cline
A. Alksnis, Dz. Deme et al., Synthesis of Oligoesters and Polyesters From Oxalic Acid and Ethylene Glycol, J. Polymer Science Polymer Chemistry Ed. vol. 15, pp. 1855-1862 (1977).
Zaikov, The Mechanism of Chemical Degradation of Polymers: Part 1--Quantitative Prediction of Hydrolytic Stability of Polyesters Polymer Degration and stability 9 (1984), pp. 41-50 JIS R 7222.
Carothers et al., Studies on Polymerization and Ring Formation. V. Glycol Esters of Oxalic Acid. Aug. 5, 1930. pp. 3292-3300.
Japanese Industrial Standard Physical Testing Methods for High Purity Graphite Material, Sep. 7, 1985 (English Translation.).
Kawakami Yukichika
Shiiki Zenya
Acquah Samuel A.
Kureha Kagaku Kogyo K.K.
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