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:
Jan. 06, 1976
Filed:
Jan. 31, 1974
Applicant:
Inventors:
James Axel Bjorklund, Saltsjo-Boo, SW;
Karin Ulla Helmer, Solna, SW;
Assignee:
Kemanord AB, Stockholm, SW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21D / ;
U.S. Cl.
CPC ...
162158 ; 8181 ; 8192 ; 252312 ; 427395 ;
Abstract
The present invention relates to a process for sizing cellulose fibers or cellulose fiber containing materials and a composition for carrying out the process. According to the process the time for developing full sizing effect of ketene dimers and carbamoyl chlorides is reduced by carrying out sizing in the presence of a chloroformate or an isocyanate. The composition for carrying out the process comprises of a paper sizing composition containing the sizing agents mentioned above in combination with a chloroformate or an isocyanate.