一种高性能PVC涂层剂的制备
Preparation of a High-Performance PVC Coating Agent
摘要:
本文对PVC涂层所用固化剂(TDI三聚体)的合成工艺进行了系统研究，探讨了催化剂及用量、反应溶剂等因素对聚合反应及固化剂性能的影响，同时对PVC糊树脂的配方组分作了改性，并通过与自制TDI三聚体固化剂的复配优化，制备出了一种性能优异的PVC涂层剂，该涂层剂的初期与终期剥离强度分别达到了3.75 kN/m和3.89 kN/m，且在8 h操作时间里，涂层剂粘度的变化率仅为21.4%。
Abstract:
In this paper, the synthesis process of curing agent (TDI Trimer) for PVC coating was studied sys-tematically. The influences of catalyst and its dosage, reaction solvent and other factors on the polymerization reaction and the performance of curing agent were discussed. At the same time, the formulation of PVC paste resin was modified. A kind of PVC coating agent with excellent perfor-mance was prepared by compounding and optimizing with self-made TDI Trimer curing agent. The initial and final peel strength of the coating agent reached 3.75 kN/m and 3.89 kN/m respectively, and the change rate of the viscosity of the coating agent was only 21.4% in the 8 h operation time.
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