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:
Dec. 06, 1983
Filed:
May. 26, 1981
Applicant:
Inventor:
John B Rose, Letchworth, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
525534 ; 528125 ; 528126 ; 528128 ;
Abstract
A polyaryletherketone polymer which is a hydrophilic sulphonated polymer derived by controllably sulphonating a copolymer having the repeat unit of formula ##STR1## together with the repeat unit of formula ##STR2## at least 70% (preferably substantially all) of the units A being sulphonated after sulphonation and substantially all the units B remaining non-sulphonated after sulphonation. The sulphonation may be effected using 98% w/w concentrated sulphuric acid at an elevated temperature.