| 摘要 |
PURPOSE:To improve the flexibility of an ink layer, the heat resistance of an image, abrasion resistance and resistance to chemicals by employing methyl methacrylate-acrylonitrile-alkanolamin modification glycidyl methacrylate as a colorant and an ink layer on a substrate. CONSTITUTION:For material becoming the main component of an ink layer, a copolymer represented by formula I that shows a pat of methyl metacrylate acrylonitrile alkanol-glycidyl methacrylate is modified with alkanolamin. Here, R1 represents alkyl possessing a linear or ramified chain of 1-4 carbon atoms, and R2 represents alkyl possessing a linear or ramified chain which has 1 t-4 carbon atoms and are replaced with a hydroxyl group. With respect to the composition ratio of the comonomers, l:m:m:x is a wt.%, practically 20-80%:10-50%:1-40%:1-50%. Their preferable average molecular weight is 3,000 to 200,000, and their molecular weight in numerical average is 1,500 to 100,000 in a value on polystyrene conversion. Preparing copolymer is carried out by a known method at two stages. |
