【作者】 王国伟；

【导师】 单志华；

【作者基本信息】 四川大学 ， 皮革化学与工程， 2002， 硕士

【摘要】 本文以2，2’—双（p—羟苯基）丙烷，即双酚A，通过甲醛、焦亚硫酸钠进行缩合、磺甲基化、中和等工艺，合成了一种新的制革专用鞣剂，希望能为制革行业提供一种高品质的鞣剂。 本论文运用UV、IR、粘度表征、水溶性及耐酸性等方法和指标对磺甲基化反应的机理进行分析发现：磺甲基化反应分两步进行。以产品粘度、溶解性、耐紫外光性、界面张力、电导率为考察指标，运用4因素、3水平正交实验方法确定了双酚A磺甲基化的合成工艺参数，即磺甲基化缩合反应在80—85℃左右，磺化剂用量25％，促进剂用量10％，酚醛比例较高时能得到综合性能较好的合成鞣剂产品。 对合成鞣剂纯化分离产物，运用UV、IR、C—NMR、GPC、元素分析等对产品的组成结构、分子量大小及分布进行了表征，结果表明：缩合物产品主要有两个组分，分别是双酚A的二聚体和四聚体，分子量在724—1500之间，分子中的C：H：N：S：O的比例为35：40：2：2：11，并提出了缩合物主要组分的分子结构式。 最后将合成鞣剂产品应用于制革过程，应用实验发现：成革的白度、耐光性能优异，适合于浅色革的生产。成革柔软丰满、增厚明显、具有选择填充功能，可以减少成革部位差，与铬结合能力强，此合成鞣剂能与Fe盐进行结合鞣鞣制，并确定Fe²⁺—合成鞣剂结合鞣制备浅色革的工艺。更多还原

【Abstract】 This paper reveaIs a new synthetic tanning agent for leather making.The product is obtained by condens ing, sulfomethylat ing and neutral izi nga mixture of bipheno1 A, formaldehyde and sodium metabisu1fite.The mechani sm of sulfomethy1ation is analyzed by UV----spectra,IR----spectra and viscosity, solubi 1i ty etc., the results show that thesulfomethylation of biphenol A can be divided into two parts, which isdifferent from the previous reports. Using orthogona1 experiment, theoptimal sulfomethy1ation recipe is determined by viscosity, solubi l ity,stabil ity in acid, surface tensi le and conductance, it is found out thatwhen the su1fomethylation was carried out at 80--85C, with 25% sodiummetabi sul fi te, l0% catalyzer, hi gher rat io of biphenol A to forma1 dehyde,the desirab1e product can be obtained. The compos it ion, molecu1ar weightof the su1fomethy1ated product is determined by GPC, e1ement ana1ysisetc. - The condensates are characteri zed by UV------spectra, IR------spectra and"C----NMR. The results show that the mo1ecular weight vary from 724 to 1500,the ratio of e1ement C:H:N:S:0 equa1s to 35:40:2:2: l1, then we get themo1ecular formula of the main components of the sulfomethy1ated product.The application experiment shows that it is a useful agent for 1eatherllmaking, with excellent lightfastness, which is suitable for producing light leather, good filling ability, nice grain. The resultant leather is very plump and soft. The product has strong affinity with chromium. The product can be applied for combination tannage with Fe2*, and decide the light color leather technology with Fe2* and the sulfomethylated products.更多还原