The Investigation and Properties of Solvent-free single pack vulcanization Polyurethane-Acrylate copolymers

• Main Authors: Wen-Mao Wong, 翁文懋
• Other Authors: Da-Kong Lee
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/93250343452654708957

碩士 === 國立宜蘭大學 === 化學工程與材料工程學系碩士班 === 102 === Reducing the volatile organic conpound (VOC) is one of the most important environmental protection topics for adhesive industry for the last few decades. In this research we introduce hydrazine group to polyurethane dispersions and ketone group to polyacrylate dispersions to form solvent free single pack vulcanization polyurethane-acrylate copolymers with hydrazone structure were investigated. Three series of polyurethane-acrylate copolymers were studied in this research. Series 1: Polyacrylates with various MMA: BA ratios of 0:10; 2:8; 4:6; 6:4; 8:2 and 10:0 wt/wt.The best adhesive strength composition was found to be MMA: BA = 2:8 which was adopted as the basic formular for the following study. Series 2: Hydrazine group concentration in polyurethane: ketone group concentration in polyacrylate= 1:0.25; 1:0.5; 1:0.75; 1:1 and 1:1.25 eq./eq.. The polyurethane-acrylate copolymers with hydrazine: ketone = 1:1 has the best shear adhesive strength, which was chosen as the basic formula for the further research. Series 3: The effects of hydrazine chemical structure and content on the properties of polyurethane-acrylate copolymers were investigated. Polyurethane dispersions were based on m-TMXDI: PCDL-5652: DMBA: TEA: mixed chain extender = 3: 1: 1: 1: 0.8. The mixed chain extender in this study used were(HYD; CDH; ADH) : EDA = 0:10; 2:8; 4:6; 6:4; 8:2 and 10:0; thus PUD has the hydrazine group content of 0.1; 0.2; 0.3; 0.4 and 0.5 meq./g respectively. Polyacrylate dispersions were based on MMA: BA = 2:8 with a DAAM content varied from 0.1; 0.2; 0.3; 0.4 and 0.5 meq./g. Polyurethane and polyacrylate dispersions were blend with a hydrazine:ketone = 1:1 to form the solvent free single pack vulcanization polyurethane-acrylate copolymers. From the study the following results can be revealed: 1. The environmental friendly solvent free single pack vulcanization polyurethane-acrylate copolymers can be prepared by m-TMXDI. 2. From shear adhesive strength test MMA: BA = 2:8 displars the best shear adhesive strength. 3. The best shear sdhesive strength was discovered on hydrazine: ketone = 1:1. 4. TC0.1-M2D0.1 base on CDH with hydrazine content of 0.1 meq./g display the best adhesive strength of 43.9 kPa which is superior than the correnponding HYD and ADH based polyurethane-acrylate copolymers.