Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1975-12-18
1978-01-24
Phynes, Lucille M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260 75T, 264288, 264289, C08L 6702
Patent
active
040704173
ABSTRACT:
A transparent polyester film having excellent printability, flexing resistance and pinhole resistance and further excellent interlaminar strength, which is made from a polymer mixture or blend comprising (i) a polyester consisting essentially of a residue of dibasic acids wherein at least 80 % by mol is terephthalic acid and a residue of at least one glycol and (ii) a block copolyester consisting of a crystalline polyester (hard) segment having a high melting point and a soft polymer segment having a low melting point and a number average molecular weight of 400 to 8,000, said soft polymer segment having a low melting point being contained in an amount of 0.5 to 10 % by weight on the basis of the whole weight of the polymer mixture or blend, and said crystalline polyester segment having a melting point of at least 170.degree. C when a polymer is produced by the monomers composing the segment alone and said soft polymer segment having a melting or softening point of 100.degree. C or lower.
REFERENCES:
patent: 3177277 (1965-04-01), Adams et al.
patent: 3256379 (1966-06-01), Heffelfinger
patent: 3701755 (1972-10-01), Sumoto et al.
patent: 3903294 (1975-09-01), Abella
patent: 3915933 (1975-10-01), Kohno et al.
patent: 3917743 (1975-11-01), Schroeder et al.
patent: 3968183 (1976-06-01), Hayashi et al.
Isaka Tsutomu
Matsunami Koichi
Murakami Tetsushi
Nagano Hiroshi
Yamane Yukio
Phynes Lucille M.
Toyobo Co. Ltd.
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