Abstract: A water hardenable cement composition comprising a fluorine-free calcium alumino silicate glass in particulate form in which the individual particulates have a particle size of less than 100 microns consisting essentially of 25-35% silica, 27-35% calcium oxide, 25-40% alumina, up to 4% of an alkali metal oxide, up to 5% of titania, the total amount of alkali metal oxide and titania being 0.5-9%, wherein the ratio of calcium oxide to silica is 0.7:1 to 1:0-7, together with a polycarboxylic acid.

Abstract: Cements for medical or industrial purposes contain watersoluble borate or phosphate glasses including multivalent ions e.g. zinc, aluminium or calcium and a poly (carboxylic acid) such as polyacrylic acid. As the glass dissolves ions or other reactive species crosslink the polymer.

Abstract: The present invention provides a process for making a water vapor permeable pressure sensitive adhesive material which comprises forming on a surface which is poorly wettable (or non-wettable) by water, a continuous coating of an aqueous emulsion based pressure sensitive adhesive having dispersed therein a water immiscible organic liquid which is more volatile than water and which does not break the emulsion; leaving the coating at room temperature until pores develop and reach a size such that the material when dried will have a water vapor permeability of from 2000 to 10,000 units as hereinafter defined; drying the coating at a higher temperature and transferring the adhesive mass to a water vapor permeable backing material. The pressure sensitive adhesive material finds use in the medical and surgical fields and especially in first-aid dressings and tapes.

Abstract: A non-woven fabric is produced by stretching the film with on one surface a regular pattern of raised areas such as spaced hexagonal bosses and on the other surface a plurality of parallel grooves. Stretching is carried out in the groove direction. Preferably the polymer is a mixture of incompatible polymers so that on stretching a fibrous structure is formed. The film can be produced by melt-embossing. The stretched non-woven fabric may be coated with various adhesives to provide a tape useful in a medical context.

Abstract: A novel calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine (preferably 4-7%) can be associated with a poly(carboxylic acid) e.g. as an intimate mixture of glass and acid to constitute a composition curable on contact with water and useful, for example, as a loading on a splinting bandage. Such a bandage preferably has a ratio of set time to gel time from 4:1 to 8:1 with a minimum gel time of 60 seconds.

Abstract: A casting or splinting material in powder form is a mixture of particles of (a) a water-soluble cross-linkable polymer containing carboxylic acid groups, such as polyacrylic acid and (b) zinc oxide and/or one or more zinc salts, this latter material being at least partly coated to reduce its surface reactivity with an organic acid e.g. an aliphatic fatty acid containing from 6 to 20 carbon atoms per molecule. Such material, that can for example be provided as a loading on a Leno gauze, can be made up as a slurry in a volatile organic liquid for coating purposes.

Abstract: A novel calcium fluoroaluminosilicate glass consisting essentially of from 25 to 35% by weight of silicon calculated as silica, from 30 to 40% by weight of aluminum calculated as alumina, from 20 to 35% by weight calcium, calculated as calcium oxide, and up to 9% by weight fluorine (preferably 4-7%) can be associated with a poly(carboxylic acid) e.g. as an intimate mixture of glass and acid to constitute a composition curable on contact with water and useful, for example, as a loading on a splinting bandage. Such a bandage preferably has a ratio of set time to gel time from 4:1 to 8:1 with a minimum gel time of 60 seconds.