Oligoaziridines: ring opening with hydrobromic acid
摘要:
Ring opening in aziridine tri- and tetramers with HBr leads to the stable hydrobromides of corresponding N-1-(beta-bromoethyl)ethyleneamines; an initial mixture of linear and branched tetraethyleneimine isomers yielded only a linear bromo derivative.
Process for crosslinking a nonwoven web using a dual crosslinking system
申请人:AIR PRODUCTS POLYMERS, L.P.
公开号:EP1199405A1
公开(公告)日:2002-04-24
This invention relates to a dual crosslinkable polymer/crosslinking system particularly suited for use in preparing high quality nonwoven products. The polymeric binders incorporate at least two different but reactive functionalities, i.e., hydroxy and carboxyl, and which are capable of reacting with two other multifunctional reactants, i.e., polyaldehydes and aziridines, each of which reacts with at least one of the functionalities present in the polymer. This selection of reactive functionality coupled with the selection of crosslinking agents permits ambient temperature cure.
High performance synthetic nonwovens using polymers having dual crosslinkable functionality
申请人:——
公开号:US20020187270A1
公开(公告)日:2002-12-12
A process for forming a synthetic based nonwoven web bonded with a crosslinkable polymer wherein an aqueous polymeric emulsion containing a crosslinkable polymer is applied to the synthetic based nonwoven web, the water removed, and the crosslinkable polymer crosslinked. The crosslinkable polymer incorporates acetoacetate functionality and carboxylic acid functionality; wherein crosslinking is achieved by the reaction of the acetoacetate with an effective amount of a polyaldehyde and the reaction of the carboxylic acid with an effective amount of a polyaziridine compound.
Removable, water-whitening resistant pressure sensitive adhesive (PSA) comprising a crosslinked aqueous emulsion polymer comprising (a) at least one hydrophobic monomer; (b) at least about 2 wt. % of at least one hydrophilic monomer; and (c) at least about 5 wt. % of at least one partially hydrophilic monomer; wherein the crosslinked aqueous emulsion polymer is crosslinked with an effective amount of at least one polyfunctional aziridine crosslinker, and the wt. % of monomers (a), (b), and (c) are based on the total weight of monomers (a), (b), and (c).