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:
Aug. 16, 1977
Filed:
Apr. 01, 1976
Applicant:
Inventors:
Ichiro Terada, Kamakura, JA;
Tadashi Yamada, Tokyo, JA;
Michio Nishi, Tokyo, JA;
Mitsuo Uchida, Tokyo, JA;
Naomasa Sugiyama, Yokohama, JA;
Mamoru Kaneko, Yokohama, JA;
Nobuhiko Takeda, Kawasaki, JA;
Assignees:
Mitsubishi Chemical Industries Limited, Tokyo, JA;
Yoshino Gypsum Co., Ltd., Tokyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106111 ; 106116 ; 260 / ; 260 / ;
Abstract
A water repellent gypsum composition comprising a gypsum, and a paraffin emulsion prepared by emulsifying (a) paraffin hydrocarbon having a melting point of 40.degree.-80.degree. C and (b) an oxidized paraffin having an acid value of 10-70 at a ratio of from 97:3 to 50:50 by weight, respectively, in the presence of a water soluble alkali compound. Optionally, a polymer emulsion or solution may be added.