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. 29, 1980
Filed:
Mar. 21, 1978
Applicant:
Inventors:
Shigehiko Yoshioka, Akashi, JP;
Kaoru Okada, Kobe, JP;
Assignee:
Seiko Kagaku Kogyo Co., Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 / ; 1621 / ; 1621 / ; 526202 ; 526203 ; 526273 ; 526292 ; 526312 ;
Abstract
A neutral sizing agent of emulsion type to be added to paper pulp for facilitating the disaggregation and recovery of waste paper in making paper including paper board, said sizing agent being produced, for example, by dispersing in an aqueous emulsifying dispersion medium a polymerizable hydrophobic monomer such as styrene or 2-ethylhexyl methacrylate by using as an emulsifying dispersing agent a copolymer having units of one or more monomers given by the formula ##STR1## or ##STR2## wherein R is H or CH.sub.3,