About: Curing Adhesives of Urea-Formaldehyde Type with Collagen Hydrolysates of Chrome-.Tanned Leather Waste.     Goto   Sponge   NotDistinct   Permalink

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Description
  • Condensatrion of dimethylol-urea ( DMU) mixed with urea (U) and collagen hydrolysate (H) obtained through enzymatic hydrolysis of chrome- tanned leather waste wihtout added curing agents in the solid phase was studied through DSC and TG techniques in tempoerature interval up to 220oC. Among techniques used TG proved to be more useful.While the DMU + U mixture produced methylene- oxide ( -CH2-O-CH2- ) and methylene ( -CH2-) bridges at a ratio approx. 1:1, urea substituted for collagen hydrolysate increased the proportion of more stable methylene bridges to metylene-oxide bridges to a ration of approx. 2:1. methylene oxide bridges are considered to be the main potential sources of formaldehyde emissions from cured urea- formaldehyde type adhesives and thus the use of collagen hydrolysate in preparation of urea-formaldehyde type is a suitable way how to make such adhesives more environmental friendly.
  • Condensatrion of dimethylol-urea ( DMU) mixed with urea (U) and collagen hydrolysate (H) obtained through enzymatic hydrolysis of chrome- tanned leather waste wihtout added curing agents in the solid phase was studied through DSC and TG techniques in tempoerature interval up to 220oC. Among techniques used TG proved to be more useful.While the DMU + U mixture produced methylene- oxide ( -CH2-O-CH2- ) and methylene ( -CH2-) bridges at a ratio approx. 1:1, urea substituted for collagen hydrolysate increased the proportion of more stable methylene bridges to metylene-oxide bridges to a ration of approx. 2:1. methylene oxide bridges are considered to be the main potential sources of formaldehyde emissions from cured urea- formaldehyde type adhesives and thus the use of collagen hydrolysate in preparation of urea-formaldehyde type is a suitable way how to make such adhesives more environmental friendly. (en)
  • Kondensace dimethylol močoviny ( DMU) ve směsi s močovinou ( U) a kolagenním hydrolysátem v tuhé fázi ,bez přídavku kyselého tužidla byla studována DSC a TG technikou v teplotním intervalu do 220oC. Z obou technik se použití TG ukázalo výhodnější.Zatím co směs DMU+U vede k vzniku methylen oxidových ( -CH2-O-CH2-) a methylenových ( -CH2-) můstků přibližně v poměru 1:1, nahrazení močoviny ve směsi kolagenním hydrolysátem chromočiněného usňového odpadu posunuje tento pomnr k hodnotě cca 2:1 ve prospěch stabilnějších methylenových můstků. Methylen-oxidové můstky jsou považovány za hlavní zdroj emisí formaldehydu vytvrzenými močovino- formaldehydovými adhesivy a přídavek kolagenního hydrolysátu může tedy značně vylepšit ekologické aspekty takových adhesiv. (cs)
Title
  • Curing Adhesives of Urea-Formaldehyde Type with Collagen Hydrolysates of Chrome-.Tanned Leather Waste.
  • Curing Adhesives of Urea-Formaldehyde Type with Collagen Hydrolysates of Chrome-.Tanned Leather Waste. (en)
  • Vytvrzování močovino- formaldehydových adhesiv hydrolysáty chromočiněného usňového odpadu (cs)
skos:prefLabel
  • Curing Adhesives of Urea-Formaldehyde Type with Collagen Hydrolysates of Chrome-.Tanned Leather Waste.
  • Curing Adhesives of Urea-Formaldehyde Type with Collagen Hydrolysates of Chrome-.Tanned Leather Waste. (en)
  • Vytvrzování močovino- formaldehydových adhesiv hydrolysáty chromočiněného usňového odpadu (cs)
skos:notation
  • RIV/70883521:28110/04:63502579!RIV/2005/MSM/281105/N
http://linked.open.../vavai/riv/strany
  • 205-219
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM 265200014)
http://linked.open...iv/cisloPeriodika
  • 75
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 559100
http://linked.open...ai/riv/idVysledku
  • RIV/70883521:28110/04:63502579
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Amino-resins; curing; formaldehyde emission; hydrolysaets of chromed leather waste (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • HU - Maďarsko
http://linked.open...ontrolniKodProRIV
  • [F7BFC57B8150]
http://linked.open...i/riv/nazevZdroje
  • Journal of Thermal Analysis and Calorimetry
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Kolomazník, Karel
  • Langmaier, Ferdinand
  • Mládek, Milan
  • Šívarová, Jarmila
http://linked.open...n/vavai/riv/zamer
issn
  • 1418-2874
number of pages
http://localhost/t...ganizacniJednotka
  • 28110
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