2) polyvinyl formal
聚乙烯醇缩甲醛
1.
The polyvinyl formal was prepared via acetalation from polyvinyl alcohol and formaldehyde in water-solution under the condition of pH value was 1.
5~2的条件下,以聚乙烯醇和甲醛为原料,在水溶液中发生缩醛反应制备聚乙烯醇缩甲醛胶,然后向胶中添加适量的尿素和分散助剂PAAM/COB,经调配得到新型水溶性聚乙烯醇缩甲醛涂料。
2.
In accordance with the princiole that in acid media the condensation reaction of hydroxylaldehyde is inversible, a way is given for the regeneration of the gel formed in the process of preparing polyvinyl formal.
根据在酸性介质中羟醛缩合反应是可逆的原理,对聚乙烯醇缩甲醛的制备过程中出现的凝胶进行再生处理,减少了原料浪费。
3) polyvinyl formaldehyde
聚乙烯醇缩甲醛
1.
This paper introduced how to make a fast-drying emulsion adhesive based on polyvinyl formaldehyde.
介绍了一种以改性的聚乙烯醇缩甲醛为基料的强力快干型抗冻乳白胶。
4) poly(vinyl formal)
聚乙烯醇缩甲醛
1.
The nonionic poly(vinyl formal) hydrogels with different porosities were synthesized by adding pore-forming agents, their swelling/deswelling behaviors and mechanical properties were measured in order to evaluate the effects of porosity.
通过成孔剂法制备不同孔隙率的聚乙烯醇缩甲醛凝胶(PVFM),其具有对含水量变化快速响应的特性,研究其在吸水、脱水过程中孔隙率对体积、质量、力学性能变化的影响。
5) polyvinyl acetal
聚乙烯醇缩乙醛
1.
A kind of highly effective formaldehyde inhibitor,polyvinyl acetal was prepared from acetic acid,ethylene and acetaldehyde.
采用醋酸乙烯酯和乙醛为原料,合成了高效甲醛阻聚剂———聚乙烯醇缩乙醛。
6) polyvinyl formal fiber
聚乙烯醇缩甲醛化纤维
补充资料：聚乙烯醇缩甲乙醛
分子式：
CAS号：
性质：聚乙烯醇与甲醛和乙醛作用而成的高分子化合物。白色到黄色的块状或纤维状物质。溶于高沸点的有机溶剂。能形成电性能和机械强度极高的涂膜，但因结构中存在羟基，涂膜对水很敏感。主要用于与酚醛树脂配合制成漆包线漆。涂膜的柔软性、坚韧性、耐磨性优良，耐热性也好。
CAS号：
性质：聚乙烯醇与甲醛和乙醛作用而成的高分子化合物。白色到黄色的块状或纤维状物质。溶于高沸点的有机溶剂。能形成电性能和机械强度极高的涂膜，但因结构中存在羟基，涂膜对水很敏感。主要用于与酚醛树脂配合制成漆包线漆。涂膜的柔软性、坚韧性、耐磨性优良，耐热性也好。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条