Phosphorus-containing flame retardant for thermoplastic polymers
A flame retarded thermoplastic polymer composition comprising a thermoplastic polymer and a metal salt of phosphinic acid possessing a desired degree of volatility.
1. A flame retardant thermoplastic nylon composition comprising a thermoplastic nylon polymer and an effective flame retardant amount of an aluminum salt of diisobutylphosphinic acid, wherein said aluminum salt begins to volatilize at about 300° C. as measured by thermogravimetric analysis at a linear heating rate of 10° C./minute in an inert atmosphere.
2. The composition of claim 1 wherein the nylon is glass-filled nylon.
3. The composition of claim 1 wherein the aluminum salt begins to volatilize at about 300° C., and substantially ceases volatilization at about 500° C.
4. The composition of claim 1 , wherein, the aluminum salt begins to volatilize at about 300° C., and substantially ceases volatilization at about 400° C.
5. The composition of claim 1 wherein said aluminum salt of diisobutylphosphinic acid is present in an amount of from about 3 to about 30 percent by weight of the total composition.
6. The composition of claim 1 wherein said aluminum salt of diisobutylphosphinic acid is present in an amount of from about 3 to about 30 percent by weight of the total composition.
7. The composition of claim 5 wherein the aluminum salt of diisobutylphosphinic acid is present in an amount of from about 5 to about 20 percent by weight of the total composition.
8. The composition of claim 6 wherein the aluminum salt of diisobutylphosphinic acid is present in an amount of from about 5 to about 20 percent by weight of the total composition.
9. A flame retardant thermoplastic nylon composition comprising a thermoplastic nylon polymer and an effective flame retardant amount of aluminum diisobutylphosphinate.
10. A flame retardant thermoplastic nylon composition consisting essentially of a thermoplastic nylon polymer and an effective flame retardant amount of an aluminum salt of diisobutylphosphinic acid, wherein said aluminum salt begins to volatilize at about 300° C. as measured by thermogravimetric analysis at a linear heating rate of 10° C./minute in an inert atmosphere.
11. The composition of claim 10 wherein the thermoplastic nylon is glass-filled.
12. The composition of claim 10 wherein the aluminum salt begins to volatilize at about 300° C., and substantially ceases volatilization at about 500° C.
13. The composition of claim 10 , wherein, the aluminum salt begins to volatilize at about 300° C., and substantially ceases volatilization at about 400° C.