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:
Apr. 07, 1981
Filed:
Jun. 05, 1978
Applicant:
Inventors:
Yutaka Taketani, Iwakuni, JP;
Yuzuru Hayashi, Iwakuni, JP;
Takeyuki Kawaguchi, Iwakuni, JP;
Tomoyoshi Ono, Iwakuni, JP;
Ko Mori, Iwakuni, JP;
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; C08J / ; C08L / ;
U.S. Cl.
CPC ...
427245 ; 210490 ; 2105002 ; 210506 ; 260 / ; 521 64 ; 521180 ;
Abstract
A process and composition for producing a permselective composite membrane. The process comprises dissolving a specified imidazolone ring-containing aromatic polymer in an aqueous liquid medium containing a water-miscible amine having a pKa of more than 5.0 in a concentration of at least 5% by weight, coating the polymer solution on a microporous substrate, and drying the coating to form an ultrathin film on the substrate. The permselective composite membrane obtained is especially useful as a reverse osomsis membrane.