Abstract: Anti-reflective coatings formed from new polymers and having high etch rates are provided. Broadly, the coatings are formed from a polymer binder and a light attenuating compound. The polymer binder has halogen atoms bonded thereto, preferably to functional groups on the polymer binder rather than to the polymer backbone. Preferred polymer binders comprise acrylic polymers while it is preferred that the halogenated functional groups of the polymer binders be dihalogenated, and more preferably trihalogenated, with chlorine, fluorine, or bromine atoms.

Abstract: Anti-reflective coatings formed from new polymers and having high etch rates are provided. Broadly, the coatings are formed from a polymer binder and a light attenuating compound. The polymer binder has halogen atoms bonded thereto, preferably to functional groups on the polymer binder rather than to the polymer backbone. Preferred polymer binders comprise acrylic polymers while it is preferred that the halogenated functional groups of the polymer binders be dihalogenated, and more preferably trihalogenated, with chlorine, fluorine, or bromine atoms.

Abstract: A dry-charged lead acid battery 10 is formed by removing the electrolyte through a aperture 13a, and then sealing the aperture 13a with a sealing plug with valve 20 having a rubber valve (check valve) provided therein. Since the formation process in the battery container is employed, the required number of production steps and the cost can be reduced as compared with the conventional dry-charged lead acid battery. Further, since a check valve for preventing the entrance of the external air and opening at a predetermined pressure to allow the leakage of the gas in the battery container to the exterior is used to keep the battery container airtight, the self-discharge of the battery during the storage period between the filling of the electrolyte and the beginning of the use of the battery can be prevented, making it possible to inhibit defective airtightness due to damage of battery container by the production of gas in the battery.