Constructional material
AssigneeBayer Aktiengesellschaft
InventorsWulf von Bonin, Ulrich von Gizycki, Kuno Wagner, Dietmar Schapel
Life of this patent
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Abstract
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.
Claims17
A synthetic resin based substitute for plaster of paris medical bandaging or splinting material enclosed in a moisture-free and moisture impervious package comprising
- (a) a flexible fiberglass substrate coated or impregnated with
- (b) a reactive one-component system which is based on an aromatic polyisocyanate which:
- (1) is free of oxycarbonyl isocyanate groups, urethane groups, urea groups, biuret groups and allophanate groups;
- (2) contains less than about 1% by weight of volatile components which can be removed at 12 Torr and 20.degree. C. in one hour;
- (3) renders said impregnated or coated flexible fiberglass substrate into a 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;
- and
- (4) contains a sufficient amount of a catalyst for the reaction of isocyanate groups with water to give it a hardening time suitable for a substitute for plaster of paris medical bandaging or splinting materials,
- said impregnated or coated fiberglass substrate remaining formable in storage.
A flexible, workable medical bandaging or splinting material enclosed in a moisture-free, moisture-impervious package which is stable in storage and which forms a rigid self-supporting structure free of extensive foaming upon reaction with water comprising a flexible substrate impregnated or coated with a reactive one-component system containing no oxycarbonyl isocyanate groups comprising a polyisocyanate.
A flexible, workable medical bandaging or splinting material enclosed in a moisture-free, moisture-impervious package is stable in storage and which forms a rigid self-supporting structure free of extensive foaming upon reaction with water comprising a flexible substrate impregnated or coated with a reactive one-component system containing no oxycarbonyl comprising a polyisocyanate with aromatically bound isocyanate groups.
A flexible, workable medical bandaging or splinting material enclosed in a moisture-free, moisture-impervious package which is stable in storage and which forms a rigid self-supporting structure of comparable mechanical strength to plaster of paris materials free of extensive foaming after forming into a planar or hollow configuration by reaction with water comprising a flexible substrate impregnated or coated with a reactive one-component system comprising a polyisocyanate free of oxycarbonyl isocyanate groups and containing sufficient catalyst for the reaction of isocyanate groups with water to give it a hardening time suitable for a substitute for plaster of paris medical bandaging or splinting materials.
A flexible, workable medical bandaging or splinting material enclosed in a moisture-free and moisture impervious package which remains formable in storage and which forms a rigid self-supporting structure of comparable mechanical strength to plaster of paris materials free of extensive foaming after forming by reaction with water comprising a flexible fiberglass substrate impregnated or coated with a reactive one-component system comprising a polyisocyanate free of oxycarbonyl isocyanate groups and containing sufficient catalyst for the reaction of isocyanate groups with water to give it a hardening time suitable for a substitute for plaster of paris medical bandaging or splinting materials.
Dependencies are inferred from the claim text.