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. 24, 1990
Filed:
Aug. 26, 1988
Tadayuki Ohmae, Chiba, JP;
Kentaro Mashita, Chiba, JP;
Noboru Yamaguchi, Chiba, JP;
Kouichiro Asao, Chiba, JP;
Norio Kondo, Osaka, JP;
Tadashi Sakurai, Chiba, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
An aqueous dispersion of a cationic polymer is disclosed, which is obtained by reacting an ethylene copolymer comprising from 40 to 80% by weight of ethylene and from 20 to 60% by weight of at least one aminoalkyl acrylamide comonomer represented by formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2 and R.sub.3 each represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; and n represents an integer of from 2 to 4, and having a melt index, as measured in accordance with JIS K-6760, of from 10 to 1,000 g/10 min with hydrochloric acid in water to form a quaternary salt and subsequently reacting the resulting quaternary salt with an epihalohydrin compound through addition reaction. The aqueous dispersion provides a coating film having an improved electrical conductivity or produces effects to simultaneously improve degree of sizing and wet strength of paper.