[article]
| Titre : |
Synthesis and application of a polymer auxiliary with silicone |
| Type de document : |
texte imprimé |
| Auteurs : |
Lu Tao, Auteur ; Luo Jianxun, Auteur ; Feng Yanjuan, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 215-220 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
acrylique, Acide L'acide acrylique ou acide acroléïque ou acide prop-2-énoïque est un composé organique de formule brute C3H4O2 et de formule semi-développée CH2=CHCOOH. C'est un acide carboxylique et un alcène vinylique, et se présente comme un liquide incolore à l'odeur âcre.
L'acide acrylique et ses esters, les acrylates, sont utilisés dans la fabrication de matières plastiques, dans les peintures acryliques et dans divers autres polyacryliques qui ont de multiples usages.
Cuirs et peaux de moutons
Douceur (toucher)
Epaississement
Formulation (Génie chimique)
Méthacrylique, AcideL'histoire de l'acide méthacrylique commence en 1865, année où il est synthétisé pour la première fois à partir du méthacrylate d'éthyle.
L'acide méthacrylique est très réactif avec les groupes carboxyles, vinyles et esters.
Polyvinylsiloxane
Retannage
Tannage synthétique
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
In order to reduce the apparent density of the finished leather and the amount of fatliquor used during leathermaking, a polymer auxiliary with silicone has been synthesised by radical co-polymerisation of acrylic acid, methacrylic acid and polyvinyl silicone oil etc. The polymers were applied in the re-tanning process of sheepskin. Comparing the viscosity and applied properties of the polymer auxiliary with silicone, the mol ratio of acrylic acid, methacrylic acid used was confirmed to be 0.5:0.2, the consumption of polyvinyl silicone oil, ammonium persulfate, the reactive temperature and time were 5%, 1.5%, 80-85°C, 120-180 minutes, respectively. Infrared spectroscopy shows that the structure of the polymer auxiliary contains -Si-O- bond. The thickening increase and softness of the treated leather are 23.1%, 6.0 and the consumption of fatliquoring agent after re-tanning can be reduced to 4~8% when the optimum consumption of the polymer auxiliary is 8~10%, the retreated leather is fine grained, soft, hydrophobic and the apparent density is 0.457g/cm3. |
| Note de contenu : |
- EXPERIMENTAL PROCEDURES : Materials - Preparation of the polymer auxiliary with silicon - Application of series of the copolymers and the selection of the synthetic recipe - Molecular weight of the polymer auxiliary with silicone and its structure determination - Application and determination of the optimum amount of the polymer auxiliary with silicone on shaved sheepskin wet-blue - Application of the polymer auxiliary with silicone matched with other fatliquors on shaved sheepskin wet-blue
- RESULTS AND DISCUSSION : Analysis of the optimised formulation of the copolymer - Analysis of the molecular weight and the structure of the optimised formulation of the copolymer and its characteristics - Results of application shaved sheepskin wet-blue of the polymer auxiliary with silicone - Results of application of the polymer auxiliary
with silicone matched with other fatliquors on shaved sheepskin wet-blue
- Table 1 : Parameters of orthogonal experiment
- Table 2 : Formulation of copolymer reaction with acrylic acid, methylacrylic acid, polyvinyl silicone oil
- Table 3 : The process of re-tanning and fatliquoring of the shaved sheepskin wet-blue based on the polymer auxiliary with silicone
- Table 4 : Results of L9(34) copolymer reaction and application
- Table 5 : Relationship between the bands and the relevant groups of
the polymer auxiliary with silicone
- Table 6 : Relation between the softness, apparent density of treated leather and the consumption of polymer auxiliary with silicone |
| En ligne : |
https://drive.google.com/file/d/1pNkVE1xleX3xY_Zl9GsZAUCHpILajT4q/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40240 |
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 107, N° 6 (11-12/2023) . - p. 215-220
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