摘要
研究了叔丁酚和甲醛在碱催化下合成羟甲基缩合物的反应机理，得出醛酚摩尔比为２．５，ＮａＯＨ浓度为６％，滴加甲醛于６５℃反应４ｈ的合成工艺。此时，制备酚醛浆表观粘度为１２００ＭＰａｓ／２５℃，数均分子量Ｍｎ＝３６５，其主要结构为两个羟甲基酚之间连１个亚甲基桥的缩合物。该缩合物经松香改性后具有较高的溶液粘度和矿油容纳度，是一种性能优异的高级胶印油墨树脂连接料。
Using alkali as catalyst the reaction mechanism of the formation of t butylphenol/formaldehyde condensation products was studied. The optimized synthetic processes at the conditions of phenol/formaldehyde ratio 1∶2.5, NaOH concentration 6 mass%, dropping formaldehyde at 65 ℃, and reaction time 4 h were defined. The resol with the main structure of a methylene bridge between two hydromethyphenol has the properties of the apparent viscosity of 1200 MPa·s (25 ℃), molecular weight n=365. The resol modified with rosin has high dissolve viscosity and mineral oil tolerance, and it can consequently be used as advanced offset ink vehicles.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1996年第5期57-60,共4页
Polymer Materials Science & Engineering
关键词
松香
改性
酚醛树脂
胶印油墨
改性
rosin modified phenolic resin, resol, vehicle, offset ink
