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:
Mar. 22, 1988
Filed:
Dec. 03, 1986
Applicant:
Inventors:
Shigeji Obayashi, Akashi, JP;
Morio Nakamura, Kakogawa, JP;
Takushi Yamamoto, Himeji, JP;
Hitoshi Tanaka, Himeji, JP;
Yuji Sakamoto, Himeji, JP;
Yasuhiro Shimada, Himeji, JP;
Assignee:
Seitetsu Kagaku Co., Ltd., Hyogo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08K / ;
U.S. Cl.
CPC ...
528490 ; 524 37 ; 524 42 ; 524 43 ; 524 44 ; 524493 ; 524503 ; 524504 ; 528499 ; 528501 ; 528503 ;
Abstract
A water-absorbent resin having an appropriate particle size and a narrow particle size distribution can be obtained by adding a powdered inorganic material in a proportion of 0.000005-0.2 part by weight to 1 part by weight of a water-absorbent resin containing therein a carboxylate as a component of the polymer with agitation in an inert solvent in the presence of 0.1-5.0 parts by weight of water and 0.005-0.2 part by weight of a surfactant and then removing water and the inert solvent by distillation.