Intumescent flame retarded polyurethane compositions

Details Intumescent flame retarded polyurethane compositions Intumescent flame retarded polyurethane compositions

1985-01-22

1985-09-17

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

521 85, 521107, 521165, 521906, 521907, 524100, 524120, 524377, 524590, C09K 328

Patent

active

045421706

ABSTRACT:
This invention relates to flame retarding compositions comprising a pentate salt selected from melammonium pentate and the pentate salt of ammelide, and a nitrogen-containing phosphate selected from amine phosphates, ammonium phosphates, and ammonium polyphosphates in amount of 25 to 95 volume % phosphate to 75 to 5 volume % pentate salt which produce unexpected results in thermoplastic polyurethane compositions in terms of oxygen index, and UL-94 rating. This invention also pertains to polyurethane compositions containing a thermoplastic polyurethane resin and a flame retarding combination of a pentate salt and a phosphate, defined above, in amount of 10 to 35 volume % of the two flame retarding components based on the total volume of the resin plus the two flame retarding componets. An aryl phosphate can also be included to enhance the flame retarding properties of thermoplastic polyurethanes. Such polyurethane compositions are intumescent, drip retardant, and are halogen-free.

REFERENCES:
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patent: 4253972 (1981-03-01), Fleenor, Jr.
patent: 4336182 (1982-06-01), Landoni et al.
patent: 4336184 (1982-06-01), Halpern
patent: 4338245 (1982-07-01), Halpern
patent: 4338246 (1982-07-01), Halpern
patent: 4342682 (1982-08-01), Halpern et al.
patent: 4363906 (1982-12-01), Cecchetti et al.
patent: 4404291 (1983-09-01), Kiefer et al.

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