Non-isocyanate polyurethane elastomers and compositions comprising such elastomers
AssigneeGrant Industries, Inc.
InventorsAndrew Bernard MAHON, Michael Joseph ISAACMAN, Steven ISAACMAN
Life of this patent
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Abstract
The present disclosure relates to gel compositions of, or containing, a non-isocyanate polyurethane (NIPU) elastomer formed from the reaction of a polycarbonate, where carbonate groups may be cyclic or non-cyclic, and a polyamine, where amines are either primary or secondary, in an optional topically acceptable carrier fluid. The gelled compositions may further contain a personal or healthcare active. The actives may be incorporated into the gel via either a pre or post load method.
Claims25
A gel composition comprising a non-isocyanate polyurethane (NIPU) elastomer being a reaction product of:
- A) a polycarbonate or a mixture of polycarbonates comprising two or more carbonate functional groups;
- B) a polyamine or mixture of polyamines comprising two or more amine functional groups, where the amine functional groups are either primary or secondary;
- C) an NIPU reaction catalyst;
- and
- D) a topically acceptable carrier fluid, wherein the topically acceptable carrier fluid is a reaction solvent at a concentration of between 50% (w/w) and 99.9% (w/w) of the gel composition;
- and
- wherein particles of the non-isocyanate polyurethane (NIPU) elastomer are dispersed in the topically acceptable carrier fluid.
A non-isocyanate polyurethane (NIPU) elastomer comprising a reaction product of:
- a polycarbonate reactant comprising two or more carbonate functional groups;
- a polyamine reactant comprising two or more primary or secondary amines;
- and
- a NIPU catalyst.
A method of making a non-isocyanate polyurethane (NIPU) elastomer comprising:
- i) mixing a polycarbonate reactant and a polyamine reactant, wherein the polycarbonate comprises two or more carbonate functional groups and the polyamine comprises two or more primary or secondary amines;
- and
- ii) adding a topically acceptable carrier fluid, wherein the topically acceptable carrier fluid is a reaction solvent to form a polymer gel mixture with a polymer concentration of about 80% (w/w);
- iii) adding a NIPU reaction catalyst;
- and
- iv) heating the reaction mixture from 25° C. to 100° C. to form the NIPU elastomer;
- wherein particles of the NIPU elastomer are dispersed in the topically acceptable carrier fluid.
Dependencies are inferred from the claim text.