Polyester film and methods for making same

A polyester and film technology, applied in the field of polyester film and its manufacture, can solve the problems of no production, low maximum molecular weight, etc.

Inactive Publication Date: 2001-06-06
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the highest reported molecular weights are still relatively low, ranging from 400 to 10,000, and a polyester containing 1,4:3,6-dianhydrosorbitan was not actually produced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0075] The molecular weight of a polymer can be estimated from the inherent viscosity (I.V.). Inherent viscosity is determined in a 1% (w / v) solution of the polymer in o-chlorophenol at 25°C. The dosage unit of the catalyst is ppm, which is the ratio of the metal weight to the weight of dimethyl terephthalate or terephthalic acid (depending on which monomer is used).

[0076] A) Polymerization

[0077] The following polymer reactants were charged to the reactor: dimethyl terephthalate (78.02 kg), isosorbide (15.42 kg) and ethylene glycol (49.90 kg), which corresponded to a molar ratio of 1:0.26:2.00. The reactor is a Hastelloy B polymerization reactor with a maximum capacity of 50 gallons, and a Hastelloy B water-cooled reflux tower with a radius of 6" is installed on it. The reflux tower is equipped with a stainless steel ring. The reactor is also equipped with There is a stainless steel ribbon stirrer, a water-cooled condensing device and a bypass. Add catalysts, including...

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PUM

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Abstract

A polyester film made from a polymer having ethylene glycol moieties, isosorbide moieties and terephthalnoyl moieties, and the method of making the film is described. The polyester film is used to form articles such as films, lacquers, labels, capacitors, insulators, and the like, and has an inherent viscosity of at least 0.35 dL/g when measured as a 1 % (weight/volume) solution of the polyester in o-chlorophenol at a temperature of 25 DEG C.

Description

field of invention [0001] This invention relates to a film formed from certain polyesters, methods of making the polyester and the film, and articles made from the film. More particularly, the present invention relates to films formed from polyesters containing isosorbide, terephthaloyl and ethylene glycol, methods of making the films and articles made from the films. Background of the invention [0002] Polymer films are used in a variety of applications such as packaging, especially food packaging, adhesive tapes, insulators, capacitors, photographic developers, x-ray developers and as sheeting. For some of the above uses, the heat resistance of the film is an important factor. Therefore, it is expected to have a higher melting point and glass transition temperature (Tg), thereby having better heat resistance and more stable electrical properties. It is further desirable for these films to have good tensile strength and high elongation at break. [0003] In an attempt t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199C08G63/672C08G63/80C08J5/18
CPCY10T428/29C08G63/672C08J2367/02C08G63/80Y10T428/31786C08J5/18
Inventor G·克哈纳里安L·F·查邦尼奥C·基钦斯S·S·沈
Owner EI DU PONT DE NEMOURS & CO
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