| Titre : |
Modification of polyurethane finishing agent using collagen hydrolysate from chrome shavings |
| Type de document : |
texte imprimé |
| Auteurs : |
Keyong Tang, Auteur ; Dominick J. Casadonte, Auteur ; Dennis C. Shelly, Auteur ; Wei Li, Auteur ; Xuejing Zheng, Auteur |
| Année de publication : |
2010 |
| Article en page(s) : |
p. 25-31 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cuirs et peaux -- Finition
Hydrolysats de protéines
Perméabilité
Polyuréthanes
Propionique diméthylol, Acide
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Finishing with traditional polyurethane finishing agents often dramatically drecreases the permeability of finished leathers. Continuing attempts have been made in recent years to develop aqueous polyurethanes (PU) finishing agents with better overall balance of properties while retaining characteristic high durability. Research in our industry has also included many studies to optimize use of the collagen available from chrome shavings. Collagen hydrolysate may contain a number of hydrophilic groups such as carboxylic, hydroxylic, amino, imino, and amide. The reactions between these collagen hydrolysate active groups and the urethane reactive groups (-NCO) resulted in the synthesis of new polyurethane finishing agents which offered increased permeability. The optimum collagenhydrolysate modifying condition forthis polyurethane finishing agent was found to be : DMPA, 5 % of the monomers by weight, reaction temperature of 80°C and reaction time of 2.5 hours. When the collagen hydrolysate is in the range of 0.6-0.8 % of IPDI by weight, a range of good properties is achievable. For example, when collagen hydrolysate is 0.6 % of IPDI by weight, the modified polyurethane finishing agent has high strength appropriate for use in basecoat or topcoat finishes. When the collagen hydrolysate is 0.8 % of IPDI by weight, the modified polyurethane finishing agent has good elongation at break and extensibility, indicating a potential aplication in leather sealing finishes. |
| Note de contenu : |
- EXPERIMENTAL : Materials and apparatus - Procedures -
- RESULTS AND DISCUSSION : Factors affecting the modification - Properties of the product - Verification of the modification
- Table 1 : Effect of temperature on reaction
- Table 2 : Effects of DMPA concentration on the reaction
- Table 3 : WVTR of leathers finished by different finishing agents
- Table 4 : WVTR of leathers finished with PU finishing agents modified with different amounts of collagen hydrolysate |
| En ligne : |
https://drive.google.com/file/d/1B2kjPTjBb-Flo2WtH6JzDg8SJHd4BK1K/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8085 |
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CV, N° 1 (01/2010) . - p. 25-31
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Modification of polyurethane finishing agent using collagen hydrolysate from chrome shavings in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CV, N° 1 (01/2010)
