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:
Oct. 19, 1982
Filed:
Feb. 05, 1980
Sueo Machi, Takasaki, JP;
Isao Ishigaki, Meabashi, JP;
Toshimi Okada, Kakogawa, JP;
Shigeaki Washio, Kobe, JP;
Japan Atomic Energy Research Institute, Tokyo, JP;
Taki Chemical Co., Ltd., Kakogawa, JP;
Abstract
A process for the production of water-soluble, substantially solid, cationic polymers comprises the step of irradiating an aqueous solution with ionizing radiation, the aqueous solution comprising at least 50% by weight of one, or two or more of specific type of amino ester or esters optionally being accompanied by acrylamide, and at least 0.1% by weight of a specific type of alcohol as an agent for inhibiting water-insolubility of the resulting polymer. The amino esters have the generic formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2 represents a hydrogen atom or an alkyl group having 1-4 carbon atoms; R.sub.3 and R.sub.4 each represents an alkyl group having 1-4 carbon atoms and x.sup.(-) represents an anion; or from the combination of at least one of said amino esters and acrylamide. The alcohols have the formula ##STR2## wherein X', Y' and Z' each represents a hydrogen atom or a hydroxyl group, providing at least one of said X', Y' and Z' is OH; and L, m and n each represents a natural number; and include isopropyl alcohol, isobutyl alcohol, sec. butyl alcohol, glycerine and propylene glycol.