| abstract |
PURPOSE: Rubber compositions having excellent adhesiveness at low and high temperatures, made by incorporating specified liquid diene rubbers into natural or synthetic rubbers. n CONSTITUTION: A reaction product obtained by the addition reaction of a liquid diene rubber having 3 or more hydroxyl groups in a molecule with a viscosity- average molecular weight of 10,000W100,000 and maleic anhydride (derivative) at 100W250°C for 1W20hr is amidated with an amino alcohol (e.g. ethanolamine) at room temperature W130°C, followed by dehydrating at 150W220°C to obtain a liquid diene rubber having 3 or more hydroxyl groups in a molecule, with a molecular weight of 10,000W150,000. 3W45pts.wt. obtained rubber and about 5pts.wt. filler (e.g. kaolin) are incorporated into 100pts.wt. natural or synthetic rubber (e.g. isoprene rubber). n COPYRIGHT: (C)1985,JPO&Japio |