The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2007
Filed:
Jun. 20, 2003
Jing Jin Tsai, Miaoli, TW;
LI Shing Lin, Miaoli, TW;
Huan Ming Chang, Miaoli, TW;
Kuang Hui Fan, Miaoli, TW;
Weng Shing Lin, Miaoli, TW;
Jing Jin Tsai, Miaoli, TW;
Li Shing Lin, Miaoli, TW;
Huan Ming Chang, Miaoli, TW;
Kuang Hui Fan, Miaoli, TW;
Weng Shing Lin, Miaoli, TW;
Chang Chun Petrochemical Co., Ltd., Taipei, TW;
Abstract
The present invention relates to a method for increasing the heat-resistant of ethylene-vinyl alcohol copolymer (EVOH), the method is characterized by using a mixture of acetic acid, magnesium dihydrogen phosphate, and potassium dihydrogen phosphate at a certain ratio as an acid-treating solution in the acid-treating procedure of a process for preparing EVOH. The EVOH produced by the method of the present invention exhibits an excellent heat-resistance and does not become yellowing attributed to the elevated processing temperature. Also, the EVOH generated by the method of the present invention exhibits a uniform heat-resistance since the additives are dispersed evenly in the EVOH.