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Aliphatic petroleum-based resins, method to control their softening point and molecular weight and hot melt pressure sentitive adhesive containing same
Aliphatic petroleum-based resins, method to control their softening point and molecular weight and hot melt pressure sentitive adhesive containing same
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机译:脂肪族石油基树脂,控制其软化点和分子量的方法以及含有该树脂的热熔压力敏感型粘合剂
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摘要
The invention provides a petroleum-based aliphatic resin havinga) a Ring and Ball (R&B) softening point in the range of 75 to 110°C,b) a weight average molecular weight (Mw) of 1000 to 2600 Dalton, a z-average molecular weight (Mz) from 1900 to 5000 Dalton and an Mw/Mn below 2.0,c) a level of aromatic protons below 1.5 % with respect to the total protons determined by 1H-NMR, andd) a mixed methylcyclohexane aniline cloud point (MMAP) of 90°C or less.;The resins according to the invention are characterized by a high amount of cyclic structures.;Further disclosed is a method of independently controlling the R&B softening point and the molecular weight of an aliphatic resin composition during its preparation by polymerization of a petroleum-based feed, the method being characterized in that the amount of cyclic structures in the resins is increased.
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