Constructional material

Claim 2

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.

Claim 3

The flexible, workable bandaging or medical splinting material of claim 1 wherein the substrate is a foamed plastic sheet.

Claim 4

The flexible workable bandaging or medical splinting material of claim 1 wherein the substrate is a woven or non-woven fabric of organic or inorganic fibers.

Claim 5

The flexible, workable bandaging or medical splinting material of claim 1 wherein the substrate is a knitted fabric of organic or inorganic fibers.

Claim 6

The flexible, workable bandaging or medical spliting material of claim 1 wherein the reactive one-component system 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.

Claim 7

The flexible, workable bandaging or medical splinting material of claim 1 wherein the rective one-component system has a viscosity of from about 3,000 to 50,000 cP at 20° C.

Claim 8

The bandaging or medical splinting material of claim 1 wherein the reaction product is of an aromatic polyisocyanate with a polyester, polyether, polycarbonate, or low molecular weight polyhydroxyl compound.

Claim 9

The bandaging or medical splinting material of claim 7 wherein the polyisocyanate is selected from the group consisting of diphenylmethane-2,4'-diisocyanate, diphenylmethane-4,4'-diisocyanate, polyphenyl-polymethylene polyisocyanates of the type obtained by aniline-formaldehyde condensation followed by phosgenation and the reaction partner is a polyether with at least two hydroxyl groups.

Claim 10

A process for producing a flexible, workable bandaging or medical splinting material which is stable is 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 impregnating or coating a flexible substrate under moisture free conditions 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, diphenylmethane-4,4'-diisocyanate, mixtures of diaphenylmethane-2,4'-and -4,4'-diisocyanate naphthylene-1,5-diisocyanate, triphenylmethane-4,4',4"-triisocyanate polyphenyl-polymethylene polyisocyanates obtained by aniline-formaldehyde condensation followed by phosgenation, with compounds which contain at least two hydrogen atoms that are rective with isocyanates selected from the group consisting of polyesters, polyethers, polythioethers, polyacetals, polycarbonates, polyurethanes, polyureas, polyester amides low molecular weight polyhydroxyl compounds and water and subsequently packaging said flexible treated substrate in an air-tight and moisture-free container.

Claim 11

A process for producing a flexible, workable bandaging or medical splinting material which is stable is 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 impregnating or coating a flexible substrate under moisture free conditions 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, diphenylmethane-4,4'-diisocyanate, mixtures of diaphenylmethane-2,4'-and -4,4'-diisocyanate naphthylene-1,5-diisocyanate, triphenylmethane-4,4',4"-triisocyanate polyphenyl-polymethylene polyisocyanates obtained by aniline-formaldehyde condensation followed by phosgenation, with compounds which contain at least two hydrogen atoms that are rective with isocyanates selected from the group consisting of polyesters, polyethers, polythioethers, polyacetals, polycarbonates, polyurethanes, polyureas, polyester amides low molecular weight polyhydroxyl compounds and water and subsequently packaging said flexible treated substrate in an air-tight and moisture-free container.

Claim 12

A flexible, workable medical splinting or bandaging material enclosed in a moisture-free and moisture-impervious package which is stable in storage and which forms a cross-linked rigid self-supporting planar or hollow structure free of extensive foaming after forming upon exposure to sufficient moisture comprising a flexible substrate impregnated or coated with a reactive one-component system selected from the group consisting of (a) organic compounds with molecular weights no greater than about 10,000 and containing SiOR-groups, where R is a C 1 -C 18 alkyl, a C 4 -C 14 cyclo- alkyl or a phenyl group, which hydrolyze upon exposure to atmospheric moisture and (b) the free isocyanate group bearing reaction products of polyisocyanates selected from the group consisting of phenylene-1,3-diisocyanate, phenylene-1,4diisocyanate, 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-diiisocyanate, 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.

Claim 13

A flexible, workable medical splinting or bandaging material enclosed in a moisture-free and moisture-impervious package which is stable in storage and which forms a cross-linked rigid self-supporting planar or hollow structure free of extensive foaming after forming upon exposure to sufficient moisture comprising a flexible substrate impregnated or coated with a reactive one-component system selected from the group consisting of (a) organic compounds with molecular weights no greater than about 10,000 and containing SiOR-groups, where R is a C 1 -C 18 alkyl, a C 4 -C 14 cyclo- alkyl or a phenyl group, which hydrolyze upon exposure to atmospheric moisture and (b) the free isocyanate group bearing reaction products of polyisocyanates selected from the group consisting of phenylene-1,3-diisocyanate, phenylene-1,4diisocyanate, 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-diiisocyanate, 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.

Claim 14

The enclosed medical splinting or bandaging material of claim 10 wherein the rective one-component system is based on organic compounds with SiOR-groups.

Claim 15

The enclosed medical splinting or bandaging material of claim 10 wherein the reactive one-component system is free isocyanate group bearing rection product.

Claim 16

The medical packaging or splinting material of claim 10 or claim 11 or claim 12 in which the impregnated substrate has the property of not substantially changing in flexibility and workability for at least four weeks in the absence of moisture.

Claim 17

A flexible, workable bandaging or medical splinting 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 containing no oxycarbonyl isocyanate groups comprising the free isocyanate group bearing reaction product of a polyisocyanate with a compound which contains at least two hydrogen atoms that are reactive with isocyanate groups.

Claim 18

A flexible, workable bandaging or medical splinting 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 containing no oxycarbonyl isocyanate groups comprising the free isocyanate group bearing reaction product of a polyisocyanate with a compound which contains at least two hydrogen atoms that are reactive with isocyanate groups.

Claim 19

The bandaging or medical splinting material of claim 14 wherein the reactive one-component system is a free isocyanate group bearing reaction product of polyisocyanates selected from the group consisting of hexahydrotolylene-2,6-disocyanate, perhydrodiphenyl-methane -2,4'-diisocyanate perhydrodiphenylmethane-4,4'-diisocyanate diphenyl-methane-2,4'-diisocyanate, diphenylmethane-4,4'-diisocyanate, mixtures of diphenylmethane-2,4'diisocyanate, tolylene-2,4-diisocyanate tolylene-2,6-diisocyanate, hexamethylene-1,6-diisocyanate, polyphenyl-polymethylene polyisocyanates obtained by aniline-formaldehyde condensation followed by phosgenation with compounds containing at least two hydrogen atoms that are reactive with isocyanates selected from the group consisting of polyesters, polyethers, polycarbonates,low moleculr weight polyhydroxyl compounds and water.

Claim 20

The bandaging or medical splinting material of claim 15 wherein the reaction product is of polyisocyanates selected from the group consisting of diphenylmethane-2,4'-diisocyante, diphenylmethane-4,4'-diisocyanate, polyphenyl-polymethylene polyisocyanates obtained by aniline-formaldehyde condensation followed by phosgenation and hexamethylene-1,6-diisocyanate with water or polyethers.

Claim 21

A flexible, workable bandaging or splinting material which is storage stable in the absence of moisture and which cures to form a cross-linked rigid structure free of extensive foaming in the presence of atmospheric moisture comprising a flexible substrate impregnated or coated with a free isocyanate group bearing reaction product of a polyisocyanate and a compound which contains at least two hydrogen atoms that are reactive with isocyanate groups, said reaction product containing a catalyst for the reaction of isocyanates with moisture in an amount sufficient to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials and being free of oxycarbonyl isocyanate groups.

Claim 22

A flexible, workable bandaging or splinting material which is storage stable in the absence of moisture and which cures to form a cross-linked rigid structure free of extensive foaming in the presence of atmospheric moisture comprising a flexible substrate impregnated or coated with a free isocyanate group bearing reaction product of a polyisocyanate and a compound which contains at least two hydrogen atoms that are reactive with isocyanate groups, said reaction product containing a catalyst for the reaction of isocyanates with moisture in an amount sufficient to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials and being free of oxycarbonyl isocyanate groups.

Claim 23

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.

Claim 24

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.

Claim 25

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.

Claim 26

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.

Claim 27

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 C 1 -C 18 alkyl, a C 4 -C 14 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.

Claim 28

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 C 1 -C 18 alkyl, a C 4 -C 14 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.

Claim 29

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: (a) a polyisocyanate based on the phosgenation product of an aniline formaldehyde condensation; and (b) a polyether containing at least two hydroxyl groups; which contains a sufficient amount of a catalyst for the reaction of isocyanate groups with moisture to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials, said reaction product being so formulated that: (c) it contains less than about 1% by weight of volatile components which can be removed at 12 Torr and 20° C. in one hour; (d) said impregnated or coated flexible substrate remains formable in the absence of moisture; and (e) it will render said impregnated or coated flexible substrate into a cross-linked rigid self-supporting structure of comparable mechanical strength to plaster of paris materials free of extensive foaming by reaction with water after forming into a planar or hollow configuration.

Claim 30

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: (a) a polyisocyanate based on the phosgenation product of an aniline formaldehyde condensation; and (b) a polyether containing at least two hydroxyl groups; which contains a sufficient amount of a catalyst for the reaction of isocyanate groups with moisture to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials, said reaction product being so formulated that: (c) it contains less than about 1% by weight of volatile components which can be removed at 12 Torr and 20° C. in one hour; (d) said impregnated or coated flexible substrate remains formable in the absence of moisture; and (e) it will render said impregnated or coated flexible substrate into a cross-linked rigid self-supporting structure of comparable mechanical strength to plaster of paris materials free of extensive foaming by reaction with water after forming into a planar or hollow configuration.

Claim 31

The medical splinting or bandaging material of claim 21 wherein the polyisocyanate is a mixture of polyphenylpolymethylene polyisocyanates and the 2,2', 2,4' and 4,44' isomers of diphenyl methane diisocyanate obtained from the distillation residue of the phosgenation.

Claim 32

The medical splinting or bandaging material of claim 21 wherein the polyisocyanate is the diphenyl methane diisocyanate distillation product of the phosgenation which has been partially carbodiimidized.

Claim 33

The medical splinting or bandaging material of claim 22 or claim 23 wherein the polyether contains between 2 and 4 hydroxyl groups.

Claim 34

A flexible workable medical splinting or bandaging material enclosed in a moisture-free and moisture impervious package which is stable in storage and which forms a cross-linked rigid self-supporting planar or hollow structure of mechanical strength comparable to plaster of paris materials free of extensive foaming after forming 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 product of: (a) a polyisocyanate based on the phosgenation product of an aniline formaldehyde condensation; and (b) a polyether containing at least two hydroxyl groups; said reaction product being so formulated that: (c) it contains less than about 1% by weight of volatile compounds which can be removed at 12 Torr and 20° C. in one hour; said impregnated or coated flexible substrate remains formable in the absence of moisture; and (e) it contains sufficient catalyst for the reaction of isocyanate groups with moisture to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials.

Claim 35

A flexible workable medical splinting or bandaging material enclosed in a moisture-free and moisture impervious package which is stable in storage and which forms a cross-linked rigid self-supporting planar or hollow structure of mechanical strength comparable to plaster of paris materials free of extensive foaming after forming 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 product of: (a) a polyisocyanate based on the phosgenation product of an aniline formaldehyde condensation; and (b) a polyether containing at least two hydroxyl groups; said reaction product being so formulated that: (c) it contains less than about 1% by weight of volatile compounds which can be removed at 12 Torr and 20° C. in one hour; said impregnated or coated flexible substrate remains formable in the absence of moisture; and (e) it contains sufficient catalyst for the reaction of isocyanate groups with moisture to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials.

Claim 36

The enclosed medical splinting or bandaging material of claim 25 wherein the polyisocyanate is a mixture of polyphenyl-polymethylene polyisocyanates and the 2,2', 2,4' and 4,4' isomers of diphenyl methane diisocyanate obtained from the distillation residue of the phosgenation.

Claim 37

The enclosed medical splinting or bandaging material of claim 25 wherein the polyisocyanate is the diphenyl methane diisocyanate distillation product of the phosgenation which has been partially carbodiimidized.

Claim 38

The enclosed medical splinting or bandaging material of claim 26 or claim 27 wherein the polyether contains between 2 to 4 hydroxyl groups.

Claim 39

A flexible, workable medical splinting or bandaging material enclosed in a moisture-free and moisture-impervious package which is stable in storage and which forms a cross-linked rigid self-supporting planar or hollow structure of comparable mechanical strength to plaster of paris materials free of extensive foaming after forming 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 product of: (a) an aromatic polyisocyanate; and (b) a polyhydroxyl compound containing at least two hydroxyl groups; said reaction product being so formulated that (c) it contains less than about 1% by weight of volatile compounds which can be removed at 12 Torr and 20° C. in one hour; (d) said impregnated or coated flexible substrate remains formable in the absence of moisture; and (e) it contains sufficient catalyst for the reaction of isocyanate groups with moisture to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials.

Claim 40

A flexible, workable medical splinting or bandaging material enclosed in a moisture-free and moisture-impervious package which is stable in storage and which forms a cross-linked rigid self-supporting planar or hollow structure of comparable mechanical strength to plaster of paris materials free of extensive foaming after forming 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 product of: (a) an aromatic polyisocyanate; and (b) a polyhydroxyl compound containing at least two hydroxyl groups; said reaction product being so formulated that (c) it contains less than about 1% by weight of volatile compounds which can be removed at 12 Torr and 20° C. in one hour; (d) said impregnated or coated flexible substrate remains formable in the absence of moisture; and (e) it contains sufficient catalyst for the reaction of isocyanate groups with moisture to give it a hardening time suitable for a substitute for plaster of paris splinting or bandaging materials.

Claim 41

The enclosed medical splinting or bandaging material of claim 29 wherein the polyhydroxyl compound contains between 2 and 4hydroxyl groups.