C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
C12P 13/00 (2006.01) C08G 73/02 (2006.01) D21H 17/56 (2006.01) D21H 21/20 (2006.01) C12N 9/14 (2006.01) C12N 9/52 (2006.01) C12N 9/54 (2006.01)
Patent
CA 2398630
Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes that treat resins. A composition containing a polyamine-epihalohydrin resin with a solids content of at least 15 wt% treated with at least one enzymatic agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a gelation storage stable reduced CPD-forming resin so that the composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 24 hours at 50°C, and a pH of about 1.0 releases less than about 250 ppm dry basis of CPD for wet strength polyamine-epihalohydrin resin and less than about 100 ppm dry basis of CPD for creping polyamine-epihalohydrin resin. A process for treating polyamine-epihalohydrin resin, to reduce the level of the nitrogen-free organohalogen compound by adding at least one microorganism, or at least one enzyme isolated from the at least one microorganism to an aqueous composition containing a solids content of at least 15 wt%, under conditions to dehalogenate the nitrogen-free organohalogen compound so as to reduce a level of the nitrogen-free organohalogen compound while leaving the polyamine-epihalohydrin resin substantially intact. A process for rendering a polyamine-epihalohydrin resin storage stable by treating the resin of less than 15 wt% with at least one enzymatic agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a gelation storage stable reduced CPD-forming resin that when stored for 24 hours at 50°C, and a pH of about 1.0 releases less than about 250 ppm dry basis while simultaneously treating the polyamine-epihalohydrin resin by contacting with at least one microorganism, or at least one enzyme isolated from the at least one microorganism, in an amount, and at a pH and temperature effective to dehalogenate residual quantities of organically bound halogen. A paper product containing the storage stable polyamine-epihalohydrin resin, when corrected for adding at about a 1 wt% addition level of the resin, contains less than about 250 ppb of CPD.
L'invention concerne des procédés visant à rendre une résine polyamine-épihalohydrine stable au stockage, y compris des procédés de préparation d'une résine stable au stockage et/ou des procédés de traitement de résines ; une composition contenant une résine polyamine-épihalohydrine, qui présente une teneur en solides d'au moins 15 % en poids et est traitée à l'aide d'au moins un agent enzymatique ; un procédé de traitement de résine polyamine-épihalohydrine en vue de réduire la quantité d'un composé organohalogéné exempt d'azote, par l'ajout d'au moins un micro-organisme ou d'au moins une enzyme isolée à partir du micro-organisme à une composition aqueuse contenant une teneur en solides d'au moins 15 % en poids, dans des conditions permettant de déshalogéner le composé organohalogéné exempt d'azote afin de réduire la quantité composé organohalogéné exempt d'azote en laissant sensiblement intacte la résine polyamine-épihalohydrine ; un procédé visant à rendre une résine polyamine-épihalohydrine stable au stockage ; un produit de papier contenant la résine polyamine-épihalohydrine stable au stockage, et qui, après modification par l'ajout d'environ 1 % en poids de résine d'addition, contient moins de 250 ppb environ de CPD (3-chloropropanediol).
Berri Massimo
Busink Ronald
Riehle Richard J.
Stevels Wim
Hercules Incorporated
Moffat & Co.
LandOfFree
Reduced byproduct high solids polyamine-epihalohydrin... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reduced byproduct high solids polyamine-epihalohydrin..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduced byproduct high solids polyamine-epihalohydrin... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1454026