초록 ▼

The present invention relates to a constructional material which is stable in storage and which is kept under moisture-free conditions and which comprises a substrate and a reactive one-component system which hardens on exposure to air by reaction with moisture. The present invention also relates to

The present invention relates to a constructional material which is stable in storage and which is kept under moisture-free conditions and which comprises a substrate and a reactive one-component system which hardens on exposure to air by reaction with moisture. The present invention also relates to a process for the production of a constructional material which is stable in storage.

대표청구항 ▼

A flexible, workable bandaging or medical material which is stable in storage when kept under moisture-free conditions and which forms a cross-linked rigid self-supporting structure free of extensive foaming upon exposure to sufficient moisture comprising a flexible substrate impregnated or coated w

A flexible, workable bandaging or medical material which is stable in storage when kept under moisture-free conditions and which forms a cross-linked rigid self-supporting structure free of extensive foaming upon exposure to sufficient moisture comprising a flexible substrate impregnated or coated with a reactive one-component system consisting essentially of the free isocyanate group bearing reaction products of polyisocyanates selected from the group consisting of phenylene-1,3-diisocyanate, phenylene-1,4-diisocyanate, mixtures of phenylene-1,3- and -1,4-diisocyanate, tolylene-2,4-diisocyanate, tolylene-2,6-diisocyanate, mixtures of tolylene-2,4- and -2,6-diisocyanate, diphenylmethane-2,4′-diisocyanate, diphenyl- methane-4,4′-diisocyanate, mixtures of diphenylmethane-2,4′- and -4,4′-diisocyanate, naphthylene-1,5-diisocyanate, triphenylmethane-4,4′,4″-triisocyanate, polyphenyl-poly- methylene polyisocyanates obtained by aniline-formaldehyde condensation followed by phosgenation, with compounds which contain at least two hydrogen atoms that are reactive with isocyanates selected from the group consisting of polyesters, polyethers, polythioethers, polyacetals, polycarbonates, polyurethanes, polyureas, polyester amides, low molecular weight polyhydroxyl compounds and water. A medical splinting or bandaging material comprising a flexible, workable substrate impregnated or coated with a reactive system consisting essentially of the free isocyanate group bearing reaction product of an aromatic polyisocyanate and a compound which contains at least two hydrogen atoms that are reactive with isocyanate groups, said reaction product being so formulated that: (a) it is free of oxycarbonyl isocyanate groups; (b) it has a viscosity below 50,000 cP at 20°C.; (c) it contains less than about 1% by weight of volatile components which can be removed by evaporation at 12 Torr and 20°C. in one hour; (d) said impregnated or coated flexible substrate remains stable and flexible in the absence of moisture; (e) it will render said impregnated or coated flexible substrate into a cross-linked rigid self-supporting structure free of extensive foaming after forming into a planar or hollw configuration by reaction with water. A process of forming a planar or hollow cross-linked rigid, self-supporting medical splint or bandage comprising; (a) impregnating or coating a flexible substrate with a free isocyanate group bearing reaction product of an aromatic polyisocyanate with a compound which contains at least two free hydrogen atoms that are reactive with isocyanate groups, said reaction product being storage stable in the absence of moisture, being free pf oxycarbonyl groups; containing less than about 1% by weight of volatile components which can be removed by evaporation at 12 Torr and 20°C. in one hour; and having a viscosity below 50,000 cP at 20°C.; (b) shaping said impregnated or coated flexible substrate to the desired configuration about the portion of the body to be supported or immobilized; and (c) reacting said free isocyanate groups with water to yield said cross-linked rigid structure free of extensive foaming. A process of forming a planar or hollow cross-linked, rigid self-supporting medical splint or bandage comprising: (a) impregnating or coating a flexible substrate with organic compounds with molecular weights no greater than about 10,000 and containing SiOR-groups, where R is a C1-C18 alkyl, a C4-C14 cycloalkyl or a phanyl group, which hydrolyze upon exposure to atomspheric moisture, said compounds being storage stable in the absence of moisture; (b) shaping said impregnated or coated flexible substrate to the desired configuration about the portion of the body to be supported or immobilized; and (c) reacting said organic compounds with water to yield said cross-linked rigid structure.