Abstract: A bathtub is provided of the walk-in type, wherein the bathtub includes an internal dam element that allows a user to segment the bathtub into a first and second compartment and operably utilize the bathtub as a sit-down tub or as a standing shower. An entry door provides access into the bathtub without requiring users to lift their legs during entry, while the dam element allows the user to fill the first compartment of the tub and prepare it for use before entering the bathtub interior. The second compartment remains empty as the first compartment fills with water, whereafter the user can enter the empty second compartment and remove the dam element after closing the entry door. The bathtub further comprises a first and second drain for independently draining the first and second compartments and allowing the user to exit the tub while the first compartment is still draining.

Abstract: A bathtub is provided of the walk-in type, wherein the bathtub includes an at least one internal dam element that allows a user to segment the bathtub into a two or more compartments and operably utilize the bathtub as a sit-down tub or as a standing shower. An entry door provides access into the bathtub without requiring users to lift their legs during entry, while the dam elements allow the user to fill the sectioned compartments of the tub and prepare it for use before entering the bathtub interior. Certain compartments may remain empty as the other compartments fill with water, whereafter the user can enter the empty the empty compartment and remove a dam element after closing the entry door. The bathtub further may also comprise a first and second drain for independently draining the compartments.

Abstract: A bathtub is provided of the walk-in type, wherein the bathtub includes an at least one internal dam element that allows a user to segment the bathtub into a two or more compartments and operably utilize the bathtub as a sit-down tub or as a standing shower. An entry door provides access into the bathtub without requiring users to lift their legs during entry, while the dam elements allow the user to fill the sectioned compartments of the tub and prepare it for use before entering the bathtub interior. Certain compartments may remain empty as the other compartments fill with water, whereafter the user can enter the empty the empty compartment and remove a dam element after closing the entry door. The bathtub further may also comprise a first and second drain for independently draining the compartments.

Abstract: A bathtub is provided of the walk-in type, wherein the bathtub includes an internal dam element that allows a user to segment the bathtub into a first and second compartment and operably utilize the bathtub as a sit-down tub or as a standing shower. An entry door provides access into the bathtub without requiring users to lift their legs during entry, while the dam element allows the user to fill the first compartment of the tub and prepare it for use before entering the bathtub interior. The second compartment remains empty as the first compartment fills with water, whereafter the user can enter the empty second compartment and remove the dam element after closing the entry door. The bathtub further comprises a first and second drain for independently draining the first and second compartments and allowing the user to exit the tub while the first compartment is still draining.

Abstract: There is disclosed a method for providing an improved abrasion resistant coating on solid substrates such as plastic articles and solid articles prepared thereby having on the surface such abrasion resistant coating. A solid substrate is coated with an organosilanol-type coating liquid comprising organosilanol molecules, or a precursor thereof or a partial condensation product thereof. At least 90 mole percent of said organosilanol molecules are trifunctional silanol molecules of the formula RSi(OH).sub.3, R being a hydrocarbon radical, and at least 50 mole percent of said trisilanols being an alkyl trisilanols of 1-3 carbon atoms or phenyl trisilanol. Preferably, at least 70 mole percent of the trisilanol is methyltrisilanol. After the coating is cured by a conventional means, it is post-treated by an electron beam irradiation to afford an abrasion resistance far superior to that obtained from organosilanol coating liquids without electron beam irradiation post-treatment.

Abstract: There is disclosed a method for providing an improved abrasion resistant coating on solid substrates such as plastic articles and solid articles prepared thereby having on the surface such abrasion resistant coating. A solid substrate is coated with an organosilanol-type coating liquid comprising organosilanol molecules or a partial condensation product thereof. At least 90 mole percent of said organosilanol molecules are trifunctional silanol molecules of the formula RSi(OH).sub.3, R being a hydrocarbon radical, and at least 50 mole percent of said trisilanols being an alkyl trisilanols of 1-3 carbon atoms or phenyl trisilanol. Preferably, at least 70 mole percent of the trisilanol is methyltrisilanol. After the coating is cured by a conventional means, it is post-treated by a glow discharge to afford an abrasion resistance far superior to those obtained from organosilanol coating liquids without glow discharge post-treatment.

Abstract: There is disclosed a method for providing an improved abrasion resistant coating on solid substrates such as plastic articles and solid articles prepared thereby having on the surface such abrasion resistant coating. A solid substrate is coated with an organosiloxane coating liquid, the coating is cured, and subsequently post-treated by a glow discharge to afford an abrasion resistance far superior to that obtained from organosiloxane coating liquids without glow discharge post-treatment. The organosiloxane coating liquid comprises and organosilonal and/or a partial condensation product thereof.There is also disclosed a mirrored solid substrate such as a plastic having an improved abrasion resistance which has a glow discharge treated organosiloxane coating layer and a mirror layer deposited thereon by a vapor deposition method.

Abstract: Dyeing of plastic articles, particularly sunglass lenses is conducted by use of a dye bath composition comprising a dye and a mixed solvent. At least about 70 weight % of the mixed solvent consists of glycerol and ethylene glycol whose relative ratio is in the range of from 95:5 to 20:80. The dyeing method and the dye bath composition are very advantageous for manufacturing sunglass lenses having high optical and aesthetic quality, particularly for dyeing hard-coated polarized lenses.

Abstract: Removal of haze from plastic articles made of cellulose acetate butyrate, such as light polarizing sunglass lenses made of cellulose acetate butyrate and polyvinyl alcohol, is accomplished by immersing said plastic articles in a substantially water-free bath composition at least 70 weight percent of which comprises an active solvent and a carrier solvent, the former being methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, or any mixture thereof, and the latter being ethylene glycol, glycerol, tricresyl phosphate, butyl phthalate, or any mixture thereof. Preferred values of the relative proportions of the active solvent and the carrier solvent are in the range of 90-5 and 10-95 weight percent, respectively, and more preferably, 80-10 and 20-90 weight percent, respectively.

Abstract: Dyeing of plastic articles, particularly sunglass lenses is conducted by use of a dye bath composition comprising a dye and a mixed solvent. At least about 70 weight % of the mixed solvent consists of glycerol and ethylene glycol whose relative ratio is in the range of from 95:5 to 20:80. The dyeing method and the dye bath composition are very advantageous for manufacturing sunglass lenses having high optical and aesthetic quality, particularly for dyeing hard-coated polarized lenses.