US4542170A Expired / Lapsed US ⏱️ 0.0 years remaining

Intumescent flame retarded polyurethane compositions

Assignee: Noveon IP Holdings Corp

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Filing: 1985-01-22

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Granted: 1985-09-17

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Expires: 2005-01-22

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Abstract

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.

Inventors

👤 Dale R. Hall
👤 Robert L. Jackson

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-27 20:26

CPC Classifications

C; C09; C09K; C09K21/00; C09K21/02; C09K21/04; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3878; C08G18/3889; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/5205; Y; Y10; Y10S; Y10S521/00; Y10S521/906; Y10S521/907

Claims Analysis

Total Claims: 27

Claim 1

Independent Claim 37 words

An intumescent composition adapted to render thermoplastic polyurethane compositions flame retardant comprising a pentate salt of an amino-s-triazine, or a mixture thereof, and a nitrogen-containing phosphate selected from amine phosphates, ammonium phosphates, ammonium polyphosphates, and mixtures thereof.

Claim 2

Dependent Claim 37 words

Claim 3

Dependent Claim 35 words

Composition of claim 1 wherein said flame retardants are present in the composition in amount of 10 to 99 volume % of said nitrogen-containing phosphate to 90 to 1 volume % of said pentate salt.

Claim 4

Dependent Claim 35 words

Composition of claim 1 wherein said flame retardants are present in the composition in amount of 25 to 95 volume % of said nitrogen-containing phosphate to 75 to 5 volume % of said pentate salt.

Claim 5

Dependent Claim 47 words

Composition of claim 3 wherein said pentate salt is selected from melammonium pentate, the pentate salt of ammelide, and mixtures thereof; and said nitrogen-containing phosphate is selected from ammonium polyphosphates of the formula (NH 4 ) n+2 P n O 3n+1 wherein n is greater than 2.

Claim 6

Dependent Claim 28 words

Composition of claim 4 including up to about 50 volume % of an aryl phosphate, based on the combined volumes of said pentate salt and said nitrogen-containing phosphate.

Claim 7

Dependent Claim 30 words

Composition of claim 4 wherein said nitrogen-containing phosphate is selected from ammonium polyphosphates of the formula (NH 4 ) n+2 P N O 3n+1 where n is greater than 50.

Claim 8

Dependent Claim 29 words

Composition of claim 6 wherein n is between 400 and 800, said pentate salt and said nitrogen-containing phosphate have an average particle size of less than about 30 microns.

Claim 9

Dependent Claim 23 words

Composition of claim 7 wherein said pentate salt and said nitrogen-containing phosphate have an averge particle size of about 10 microns or less.

Claim 10

Dependent Claim 22 words

Composition of claim 6 wherein said pentate salt and said nitrogen-containing phosphate have an average particle size of 10 microns or less.

Claim 11

Dependent Claim 56 words

Composition of claim 5 wherein said aryl phosphate is a mixture of isopropylphenyl and phenyl phosphates and amount thereof is 10 to 30 volume %; said pentate salt is melammonium pentate; said nitrogen-containing phosphate is ammonium polyphosphate; and said pentate salt and said nitrogen-containing phosphate have an average particle size of about 10 microns or less.

Claim 12

Dependent Claim 33 words

Flame retardant polyurethane composition comprising a thermoplastic polyurethane, a pentate salt of an amine-s-triazine or a mixture thereof, and a nitrogen-containing phosphate selected from amine phosphates, ammonium phosphates, ammonium polyphosphates, and mixtures thereof.

Claim 13

Dependent Claim 33 words

Claim 14

Dependent Claim 28 words

Composition of claim 11 wherein said pentate salt and said nitrogen-containing phosphate are present in an amount sufficient to render said composition intumescent and drip retardant on combustion.

Claim 15

Dependent Claim 69 words

Composition of claim 11 wherein said nitrogen-containing phosphate is present in amount of 10 to 99 volume % and said pentate is present in amount of 90 to 1 volume %, the total of said pentate salt and said nitrogen-containing phosphate in said composition being in the range of 5 to 50 volume %, based on the total volume of said polyurethane, said pentate salt, and said nitrogen-containing phosphate.

Claim 16

Dependent Claim 66 words

Composition of claim 11 wherein said nitrogen-containing phosphate is present in amount of 25 to 95 volume % and said pentate salt is present in amount of 75 to 5 volume %, the total of said pentate salt and said nitrogen-containing phosphate in said composition being 10 to 35 volume %, based on the total volume of said polyurethane, said pentate salt, and said nitrogen-containing phosphate.

Claim 17

Dependent Claim 57 words

Composition of claim 12 wherein said pentate salt is selected from melammonium pentate, the pentate salt of ammelide, and mixtures thereof; and said nitrogen-containing phosphate is selected from ammonium polyphosphate of the formula (NH 4 ) n+2 P n O 3n+1 wherein molecular weight thereof is high enough so that said polyphosphate has low solubility in water.

Claim 18

Dependent Claim 33 words

Composition of claim 15 including up to about 20 volume % of an aryl phosphate, based on the combined volumes of said polyurethane, said pentate salt, said nitrogen-containing phosphate, and said aryl phosphate.

Claim 19

Dependent Claim 29 words

Composition of claim 13 wherein n is between 400 and 800, said pentate salt and said nitrogen-containing phosphate have an average particle size of less than about 30 microns.

Claim 20

Dependent Claim 31 words

Composition of claim 13 wherein said pentate salt and said nitrogen-containing phosphate have an average particle size of about 10 microns or less and wherein said n is greater than 50.

Claim 21

Dependent Claim 31 words

Composition of claim 18 including 1 to 10 volume % of triaryl phosphate, based on the combined volumes of said polyurethane, said pentate salt, said nitrogen-containing phosphate, and said triaryl phosphate.

Claim 22

Dependent Claim 11 words

Composition of claim 18 wherein said pentate salt is melammonium pentate.

Claim 23

Dependent Claim 27 words

Composition of claim 20 wherein said pentate salt and said nitrogen-containing phosphate are present in an amount sufficient to render said composition intumescent and non-dripping on combustion.

Claim 24

Dependent Claim 46 words

Composition of claim 12 wherein said thermoplastic polyurethane is an elastomer having Tg of less than 0° C. and the relative amount of said pentate salt to said nitrogen-containing phosphate being such that the combination produces unexpected results in terms of oxygen index and UL-94 rating.

Claim 25

Dependent Claim 67 words

Composition of claim 22 wherein said polyurethane elastomer is linear, has Tg in the range of -10° C. to -55° C., and contains alternating hard and soft segments, said composition being halogen-free, having oxygen index of 29 or greater, drip retardant, meets UL94-VO rating, Vicat softening temperature of 75° C. or greater, ultimate tensile strength of 8 MPa or greater, and ultimate elongation of 200% or better.

Claim 26

Dependent Claim 31 words

Composition of claim 23 including 1 to 10 volume % of triary phosphates, based on combined volumes of said polyurethane elastomer, said pentate salt, said nitrogen-containing phosphate, and said triaryl phosphate.

Claim 27

Dependent Claim 117 words

Composition of claim 24 wherein said triary phosphate is a mixture of isopropylphenyl and phenyl phosphates; said pentate salt is melammonium pentate; said nitrogen-containing phosphate is ammonium polyphosphate of the formula (NH 4 ) n+2 P n O 3n+1 where n is greater than 50; said nitrogen-containing phosphate is present in amount of 25 to 95 volume % and said pentate salt is present in amount of 75 to 5 volume %, based on the total volume of said phosphate and said pentate salt, and the total of said phosphate and said pentate salt in said compositions is 10 to 35 volume %, based on the total volume of said polyurethane, said phosphate, and said pentate salt.

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-09-16	1989-03-18	1989-09-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-09-16	1993-03-18	1993-09-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-09-16	1997-03-18	1997-09-17	$7700.00	Window Closed / Lapsed

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