摘要
考察了不同甲醛捕捉剂对三聚氰胺甲醛树脂中游离甲醛的捕捉效果,并探讨了合成工艺对树脂中游离甲醛的影响。结果表明:尿素对甲醛的捕捉能力虽高,但改性后树脂的溶解性变差;聚乙烯醇400和双氧水的捕捉能力较差;二乙醇胺对于甲醛的捕捉能力较好,达22.47%,且不会影响固体树脂的溶解性;当n(二乙醇胺)∶n(游离甲醛)>2∶1时,树脂中游离甲醛含量降低不再明显。树脂中游离甲醛含量随n(甲醛)∶n(三聚氰胺)比增加而增大。羟甲基化过程中加入尿素,可有效降低树脂中游离甲醛的含量,且随尿素用量的增加,游离甲醛含量降低;当n(三聚氰胺)∶n(甲醛)∶n(尿素)∶n(磺酸基)为1∶4∶1∶2,二乙醇胺为甲醛捕捉剂时,树脂中游离甲醛含量为0.22%,固体树脂溶解度好。
Effects of various formaldehyde capturing agents and mine formaldehyde resins were investigated. The results show that, id resin decreases . The capturing ability of polyvinyl alcohol 400 synthesis technology on the free formaldehyde emission of mela- the urea＇ s capturing ability is best, while the solubility of soland H2O2 are poor. The diethanolamine＇ s capturing ability is better and the capture ration can get 22.47%, the dried resin has good solubility. The free formaldehyde emission changes little when n （diethanolamine） ： n （ free formaldehyde） 〉 2 ： 1 and increases with the increase of n （formaldehyde） ： n （melamine）. The free formaldehyde emission can be decrease by the addition of urea during methylolated process and decreases with the increase of urea dosage. The free formaldehyde emission of resin is 0. 22% when n（melamine） ：n（formaldehyde） ：n（urea） ：n（ --SO3Na） = 1 ：4：1：2 and diethanolamine as capturing agent, the solid resin has a good solubility.
出处
《中国皮革》
CAS
北大核心
2013年第17期51-54,共4页
China Leather
关键词
三聚氰胺甲醛树脂
游离甲醛
二乙醇胺
melamine formaldehyde resin
free formaldehyde emission
diethanolamine
