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. 07, 1981
Filed:
Jun. 05, 1979
Applicant:
Inventor:
Wolfgang Sliwka, Weinheim, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
252316 ; 282 275 ; 427340 ; 428307 ; 428914 ;
Abstract
A process for hardening microcapsules having walls of synthetic polymers containing groups reactive toward aldehyde groups, wherein hardening is effected by means of a methylolmelamine or an ether thereof at a slightly acidic to slightly alkaline pH. Very impermeable microcapsules are obtained, which are suitable for the manufacture of colorless no-carbon papers.