Superficial Use of Cationic or Amphoteric Polymers on Semifinished Leather Products
申请人:Wolf Gerhard
公开号:US20070266501A1
公开(公告)日:2007-11-22
A process for the treatment of leather comprises the following process steps: (a) Application of at least one cationic or amphoteric aqueous treatment composition to leather by roll coating and/or roll application and/or spray application, and subsequently (b) treatment of the leather with an anionic leather treatment composition in a drum.
Epichlorohydrin Amine Polymers Used for Treating the Surface of Leather
申请人:Wolf Gerhard
公开号:US20090094758A1
公开(公告)日:2009-04-16
An epichlorohydrinamine polymer has a ratio of amine units to epichlorohydrin units of from 0.8:1.2 to 1.0:1.0, dimethylaminopropylamine and benzylamine preferably being used as amine and/or ammonium units. The novel epichlorohydrinamine polymer is used, for example, for the surface treatment of semifinished leather products and textile materials.
US7728072B2
申请人:——
公开号:US7728072B2
公开(公告)日:2010-06-01
Steric effect in alkylation reactions by<i>N</i>-alkyl-<i>N</i>-nitrosoureas: a kinetic approach
作者:J. A. Manso、M. T. Pérez-Prior、M. P. García-Santos、E. Calle、J. Casado
DOI:10.1002/poc.1402
日期:2008.11
by five N-alkyl-N-nitrosoureas (methyl-, ethyl-, propyl-, butyl-, and allylnitrosourea) were investigated in 7:3 (v/v) water/dioxane medium in the 5.0–6.5 pH range. Decomposition of alkylnitrosoureas (ANU) gives rise to alkyldiazoniumions that yield NBP-R adducts directly or through carbocations in certain instances. The NBP alkylation rate constants by these species were determined. The following sequence