脲醛树脂的合成及其性能研究
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摘要
以尿素和甲醛为原料合成脲醛树脂,探究了不同合成条件对产物性能的影响。结果表明:采用碱-酸-碱合成工艺,尿素分两次加入的合成方法,原料尿素与甲醛的摩尔比为1:2.65,原料的pH值为7.7,改性剂三聚氰胺,95℃下反应2h。合成的脲醛树脂的游离醛含量为4.96%,固体含量高达46.56%。
Investigate the method of inhibiting free formaldehyde in the process of urea-formaldehyde resin synthesis and dsicuss the optimization of synthesis process and the effects of different modifiers.Results show that the alkali-acid-alkali synthesis process,the synthetic method in which urea is added in two batches,raw material mole ratio of urea and formaldehyde is 1:2.65,the raw material of formaldehyde pH value of 7.7,melamine modifying agent,reaction 2 h under 95 ℃.The content of free aldehydes in the synthetic resin was 4.96% and the solid content was up to 46.56%.
Investigate the method of inhibiting free formaldehyde in the process of urea-formaldehyde resin synthesis and dsicuss the optimization of synthesis process and the effects of different modifiers.Results show that the alkali-acid-alkali synthesis process,the synthetic method in which urea is added in two batches,raw material mole ratio of urea and formaldehyde is 1:2.65,the raw material of formaldehyde pH value of 7.7,melamine modifying agent,reaction 2 h under 95 ℃.The content of free aldehydes in the synthetic resin was 4.96% and the solid content was up to 46.56%.
引文
[1]王博,张彦华,谭海彦,顾继友.三聚氰胺改性脲醛树脂的研究进展[J].化工新型材料,2018,46(2):234-237+241.
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[3]赵厚宽,王鹏,谢星鹏,叶哲孜,谢益民.脲醛树脂合成过程中游离甲醛的抑制[J].生物质化学工程,2017,51(1):20-26.
[4]甘文玲,高振忠.三聚氰胺改性脲醛树脂胶粘剂研究进展[J].中国胶粘剂,2016,25(6):52-56.
[5]王淑敏,时君友.超低甲醛释放脲醛树脂制备与固化结构表征[J].林产工业,2015,42(11):36-38.
[2]文美玲,朱丽滨,张彦华,谭海彦,顾继友.三聚氰胺共聚改性脲醛树脂固化性能研究[J].中国胶粘剂,2015,24(2):20-24.
[3]赵厚宽,王鹏,谢星鹏,叶哲孜,谢益民.脲醛树脂合成过程中游离甲醛的抑制[J].生物质化学工程,2017,51(1):20-26.
[4]甘文玲,高振忠.三聚氰胺改性脲醛树脂胶粘剂研究进展[J].中国胶粘剂,2016,25(6):52-56.
[5]王淑敏,时君友.超低甲醛释放脲醛树脂制备与固化结构表征[J].林产工业,2015,42(11):36-38.