Abstract:
Thermoplastically processible moulding compounds consisting essentially of (1) at least one cellulose ester of an aliphatic carboxylic acid (2) an incompatible ethylene/vinyl ester copolymer containing 30 to 75% by weight of vinyl esters and (3) optionally, a compatible ethylene/vinyl ester copolymer containing 75.1 to 98% by weight of vinyl ester.
Abstract:
Compositions for flameproofing plastics without the release of toxic products during use in which compositions consist of a pulverulent mixture containing from 50 to 95% by weight of red phosphorous and from 5 to 50% by weight of polymers having unsaturated malenoid, fumaroid or allyl bonds.
Abstract:
Inorganic photochromic crystalline particles which are particularly useful in ophthalmic quality plastic host materials are formed for instance utilizing a silver halide crystal whose dimensions lie generally in the range between 30 Angstroms and 10,000 Angstroms. The surface of the silver halide crystal is coated with an inorganic material in an effective thickness to render the coating resistant to diffusion from within and to protect the crystal from interaction with host material. The stabilized coated particles can be introduced by known schemes into plastic host materials in order to form photochromic plastic articles useful in the preparation of films, sheets, filters for cameras, wall panels and ophthalmic lenses and other optical devices.
Abstract:
SEMIPERMEABLE MEMBRANES FOR USE IN REVERSE OSMOSIS OR ULTRAFILTRATION ARE PREPARED BY CAST MOLDING A CAST MOLDING SOLUTION COMPRISING CELLULOSE ACETATE, A SWELLING AGENT AND A COMPOSITE SOLVENT COMPRISING ACETONE AS A FIRST COMPONENT AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF 1,4-DIOXANE, 1,3-DIOXOLANE, DIMETHYL FORMAMIDE AND 2-METHOXYETHYL ACETATE AS A SECOND COMPONENT. THE SOLUTION IS CAST MOLDED AT AMBIENT TEMPERATURE.
Abstract:
This instant invention relates to a filter paper suitable for use at an elevated temperature using an adhesive composition comprising a heat curable water-based polyvinyl acetate thermosetting resin adhesives comprising, in addition to the resins noted, water-soluble methyl cellulose in an amount sufficient to form a non-elastic continuous film on the adhesive surface when exposed to curing temperatures.