| 摘要 |
PURPOSE:To adjust refractive index between the main agent and bride agent which form a bonding agent in order to prevent generation sparcle and improve picture quality by using unsaturated ester as the bride agent of bonding agent which is used for bonding a non-reflective transparent plate to the face plate portion. CONSTITUTION:The bonding agent 3' used for bonding the non-reflective transparent plate 4 to the face plate of CRT contains unsaturated polyester main chain (refractive index: 1.50) as the main agent, stylene (refractive index: 1.54) as the bridge agent and unsaturated ester which has double coupling within the molecules (refractive index: 1.45). Thereby, polymerization of only the discrete stylene is prevented, production of polystylene (refractive index: 1.55 or more) is interfared and stylene and unsaturated ester are polymerized. As a result, the refractive index of this polymer becomes about 1.504 and it is adjusted to a value near to the refractive index of 1.50 of the unsaturated polyester main chain. Therefore, difference of refractive indices within the bonding agent 3' can be eliminated, generation of sparcle generated by difference of refractive indices can be prevented and high quality picture can be obtained. |
