Ionic liquid flame retardants
The present invention relates to the use of ionic liquids as flame retardants. The compounds of the invention may be used as flame retardants in various materials without causing damage to the environment and or health of humans or animals. Ionic liquid flame retardants maybe applied alone or in combination with traditional flame retardants. Ionic liquid flame retardants can be applied to finish textile, plastic, leather, paper, rubber or as wild fire flame retardants.
1. A flame retardant or flame resistant material, wherein said flame retardant or flame resistant material comprises 80 to 99.9% by weight a base material, and wherein said flame retardant or flame resistant material further comprises 0.01 to about 20% by weight of a flame retardant composition that is homogenously dispersed within said flame retardant or flame resistant material, wherein said flame retardant composition comprises an ionic liquid having the formula:
wherein A is P; and wherein
each R 1 , R 2 , R 3 and R 4 is independently selected from the group consisting of (C 1 -C 5 )alkyl, and C 6 -C 7 aryl;
X − is (R 9 ) 2 PO 4 − , and wherein R 9 is selected from the group consisting of (C 1 -C 5 )alkyl and C 6 -C 7 aryl;
wherein the base material is acrylate polymer,
wherein the presence of said ionic liquid renders said flame retardant or flame resistant material flame retardant or flame resistant compared to the same base material in the absence of said ionic liquid;
wherein the flame retardant or flame resistant material has UL94 flammability rating of at least V2.
2. The flame retardant or flame resistant material of claim 1 , wherein the ionic liquid having the formula 19:
3. A method for increasing flame retardant or flame resistant in a base material, said method comprising: providing an ionic liquid in said base material to obtain a flame retardant or flame resistant material comprising from about 0.01 to about 20% by weight of the ionic liquid, wherein the presence of said ionic liquid renders said flame retardant or flame resistant material flame retardant or flame resistance compared to the same base material in the absence of said ionic liquid;
wherein the ionic liquid having the formula:
wherein A is N or P; and wherein
each R 1 , R 2 , R 3 and R 4 is independently selected from the group consisting of (C 1 -C 5 )alkyl and C 6 -C 7 aryl;
X − is (R 9 ) 2 PO 4 − , R 9 SO 3 − , or R 9 SO 4 − , and wherein R 9 is selected from the group consisting of (C 1 -C 5 )alkyl and C 6 -C 7 aryl;
wherein the base material is polymer selected from the group consisting of phenolics, polycarbonates, polyurethanes polyesters, polyethylene, polypropylene, polyacrylate, ethylene-vinyl acetate copolymers, polyamides, epoxy resins, polyvinylchloride resin, and polymethylmethacrylate,
wherein the flame retardant or flame resistant material has UL94 flammability rating of at least V2.
4. The method of claim 3 further comprising adding traditional non-halogenated flame retardant to said flame retardant or flame resistant material, wherein said traditional non-halogenated flame retardant is selected from the group consisting of a mineral flame retardant, a phosphorus based flame retardant, a nitrogen based flame retardant, a silicon based flame retardants and nanometric particles, and combinations thereof.
5. The method of claim 3 , wherein the ionic liquid having the formula 19 or 20:
6. The method of claim 3 , wherein the ionic liquid having the formula 19:
7. The method of claim 3 , wherein the base material is acrylate polymer.