丁酰基 30-35%:
外观Appearance 粉末
红外光谱鉴别Infrared spectrometry Conforms
水分Water ≤3.00 %(by Karl Fischer)
粘度Viscosity 0.06 - 0.14 (sec.)
丁醛基butyryl content: 30.0 - 35.0 %
乙酰基acetyl content: 16.0 - 19.0 %
羟基hydroxyl content: 1.0 - 1.6 % (typically)
游离酸Free Acidity, ppm ≤300
分子量Molecular Weight 12,000
(为汽车底色漆而设计。能抗冲击和清漆中溶剂的咬底)
丁酰基 35-39%:
外观Appearance 白色纤维状固体
红外光谱鉴别Infrared spectrometry Conforms
干燥损失Loss on drying <3 %
粘度Viscosity 17 - 28 (sec.)
丁醛基butyryl content: 35.0 – 39.0%
乙酰基acetyl content: 12.0 – 15.0%
羟基hydroxyl content: 1.4 – 2.2% (typically)
游离酸Free Acidity, ppm ≤300
分子量Molecular Weight 70000
(粘度最高,流变改性最大。在汽车涂料中用作一种拼用纤维素树脂)
丁酰基 44-48% :
外观Appearance 白色纤维状固体
红外光谱鉴别Infrared spectrometry Conforms
水分Water ≤3.00 %(by Karl Fischer)
粘度Viscosity 0.16 - 0.40 (sec.)
丁醛基butyryl content: 44 - 50%(约46%)
乙酰基acetyl content: 2-4%
羟基hydroxyl content: 4.0 – 5.0% (typically)
游离酸Free Acidity, ppm ≤300
(可溶于醇类溶剂,具有极佳的相容性和颜料润湿性。高羟基含量提供高交联密度)
丁酰基 50-54% :
外观Appearance 白色纤维状固体
红外光谱鉴别Infrared spectrometry Conforms
干燥损失Loss on drying <3 %
粘度Viscosity 0.16- 0.25 (sec.)
丁醛基butyryl content: 50-52%
乙酰基acetyl content: 2-4%
羟基hydroxyl content: 1.4 – 2.4% (typically)
游离酸Free Acidity, ppm ≤300
分子量Molecular Weight 30000
(相容性极好,粘度低。适用于高固体分涂料,热固型涂料。在紫外线固化涂料中可用作改性剂)
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