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:
Nov. 23, 1976
Filed:
Dec. 09, 1974
Applicant:
Inventors:
Keith John Pickard, Widnes, EN;
Alan Smith, Tarvin, EN;
Assignee:
Laporte Industries Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C09K / ; D21F / ;
U.S. Cl.
CPC ...
536 30 ; 81156 ; 8181 ; 8189 ; 162158 ; 252182 ; 260 / ; 2603 / ; 536 31 ;
Abstract
The present invention provides compositions for treating cellulosic materials, and in particular for sizing paper or waterproofing textiles with a reactive agent. The reactive agent is a cyclic imide substituted by an aliphatic hydrophobic group and N-substituted by an electron-withdrawing group. Preferably, the composition contains a non-aromatic cyclic imide N-substituted by a long chain acyl group, e.g. N-stearoyl-4-cyclohexene-1,2-dicarboximide. Aqueous emulsions of the imides preferably contain a retention aid such as acrylamides and may be used particularly suitably to size aqueous paper pulp even under mildly alkaline conditions.