CAR—2型丙烯酸树脂复鞣剂的应用研究

APPLICATION STUDY OF THE CAR-2 ACRYLIC RESIN RETANNING AGENT

本文根据CAR—2型丙烯酸树脂复鞣剂的结构与性能,对其应用条件与范围,鞣革性能以及与其它复鞣材料的配伍等进行了研究。实验结果表明,CAR—2型丙烯酸树脂中含有大量羧基,它们能与铬鞣革中的铬盐结合而具有下列优点:1)能牢固地填充于皮革内,使皮革丰满柔软,粒面细致平整且能保持铬鞣革的耐光性,弹性和强度;2)具有非常好的选择填充作用,能缩小皮革部位差,提高出裁率:3)与其它复鞣材料配伍能解决皮革的松面问题;4)具有漂白和匀染作用。此外,用于铬鞣革的预鞣能使废铬液中的三氧化二铬含量由3—5克/升下降到0.1—0.3克/升。

Based on the structure and prperties of CAR-2 acrylic vesin retanning agent, this paper has discussed its application condition and limits. The compatibilities of CAR-2 retanning agent with other retanning agents are also presented here. The research results indicate that CAR-2 acrylic resin retanning agent contains mang carboxyl group, in its structure, which can combine chromium salt in the tanned leather, The combination between carboxyl of CAR-2 retanning agent and chrometan introduces some merits: (a) fix the retanning agent firmly inside the leather and fill it; impart leather fullness, softness, and a smooth fine grain; preserve the lightfast, elasticity, and strength of chrome-tanned leather, (b) Show an excelleutly selective filling effect so that it can improve the evenness of the leather and increase its utilization rate, (C) Overcome the loose grain problem of leather by applying CAR-2 retanning agent with other retanning agents, (d) give a bleaching and level dyeing effects. Moreover, it can lessen the Cr_2O_3 content of used chrome-Liquor from3-5g/l to 0.1～0.5g/l when CAR-2 retanning agents is used as a pretanning agent in chrome tannage.