Patent EP0051347A2 successfully refreshed from Google Patents.
EP0051347A2
Expired / Lapsed
EP
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Intumescent flexible polyurethane foam and process of manufacture thereof
Assignee: G F C Foam Corp
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Filing: 1981-04-22
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Granted: —
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Expires: 2001-04-22
Abstract
Abstract Flexible resilient flame-retardant and intumescent polyurethane foam is prepared from a reaction mixture comprising a polyether polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a flame-retardant and hydrated alumina; the amount of flame-retardant is 30 to 160 parts by weight/100 parts of the polyol. Preferably, the mixture also comprises a low-viscosity linear polyester. In a preferred embodiment, the hydrated alumina is predispersed in a mixture comprising the flame-retardant and a low-viscosity linear polyester; in another preferred embodiment a char former and/or a fugitive viscosity modifier is/are included.
Inventors
- 👤 Herman Stone
- 👤 Peter Daniel Pauly
- 👤 Michael P. Pcolinsky Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08J9/0014; C08K; C08K5/00; C08K5/0008; C08K5/0066; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/0058; C08G2110/0066; C08G2110/0083; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
116 words
A process of manufacture of a flexible resilient flame-retardant and intumescent polyurethane foam from a reaction mixture comprising (a) at least one polyether polyol, (b) at least one organic polyisocyanate, (c) at least one flame-retardant, (d) at least one blowing agent, (e) at least one surfactant and (f) at least one catalyst, characterised in that the amount of flame-retardant (c) is 30 to 160 parts by weight, per 100 parts by weight of polyether polyol (a), and that the reaction mixture also comprises, per 100 parts by weight of polyether polyol (a), 0 to 100 parts by weight of (g) a low-viscosity linear polyester polyol and 200 to 400 parts by weight of (h) hydrated alumina.
Claim 2
Dependent Claim
116 words
A process of manufacture of a flexible resilient flame-retardant and intumescent polyurethane foam from a reaction mixture comprising (a) at least one polyether polyol, (b) at least one organic polyisocyanate, (c) at least one flame-retardant, (d) at least one blowing agent, (e) at least one surfactant and (f) at least one catalyst, characterised in that the amount of flame-retardant (c) is 30 to 160 parts by weight, per 100 parts by weight of polyether polyol (a), and that the reaction mixture also comprises, per 100 parts by weight of polyether polyol (a), 0 to 100 parts by weight of (g) a low-viscosity linear polyester polyol and 200 to 400 parts by weight of (h) hydrated alumina.
Claim 3
Dependent Claim
41 words
A process according to claim 1, wherein the hydrated alumina (h), the or each flame-retardant (c) and the low-viscosity linear polyester polyol (g) are first blended into a uniform dispersion before being combined with the other components of the reaction mixture.
Claim 4
Dependent Claim
129 words
A process according to claim 1 or 2, wherein the reaction mixture also comprises (j) at least one char former selected from low molecular weight aldehydes, aldehyde generators, partially or completely etherified urea/ formaldehyde condensates, melamine and melamine derivatives having the formula: wherein A, B, D, E, F and G are the same or different and each represents a hydrogen atom or a methylol or R O C H - group, in which R is an alkyl group containing 1 to 4 carbon atoms, with the proviso that at least one of A, B, D, E, F and G is a methylol or ROCH 2 - group. 4. A process according to claims 2 and 3, wherein the uniform dispersion also comprises at least one of the char formers.
Claim 5
Dependent Claim
31 words
A process according to claim 3 or 4, wherein the amount of char former (j) is 5 to 30 parts by weight, per 100 parts by weight of polyether polyol (a).
Claim 6
Dependent Claim
29 words
A process according to claim 5, wherein the amount of char former (j) is 10 to 25 parts by weight, per 100 parts by weight of polyether polyol (a).
Claim 7
Dependent Claim
18 words
A process according to any of claims 3 to 6, wherein the char former (j) comprises hexa(methoxy methyl)melamine.
Claim 8
Dependent Claim
17 words
A process according to any of claims 3 to 7, wherein the char former (j) comprises hexamethylenetetramine.
Claim 9
Dependent Claim
21 words
A process according to any of claims 3 to 8, wherein the uniform dispersion also comprises a low-boiling fugitive halogenated hydrocarbon.
Claim 10
Dependent Claim
29 words
A process according to claim 9, wherein the amount of halogenated hydrocarbon is 2 to 20 parts by weight, per 100 parts by weight of polyether polyol (a) .
Claim 11
Dependent Claim
15 words
A process according to claim 9 or 10, wherein the halogenated hydrocarbon comprises methylene chloride.
Claim 12
Dependent Claim
15 words
A process according to claim 9, 10 or 11, wherein the halogenated hydrocarbon comprises trichloromonofluoromethane.
Claim 13
Dependent Claim
18 words
A process according to any preceding claim, wherein the polyether polyol (a) comprises a dispersion of a polyhydrazodicarbonamide.
Claim 14
Dependent Claim
19 words
A process according to any preceding claim, wherein the polyether polyol (a) has been modified with acrylonitrile and/or styrene.
Claim 15
Dependent Claim
28 words
A process according to any preceding claim, wherein the organic polyisocyanate (b) is a mixture of 2,4-tolylene diisocyanate and 2,6 tolylene diisocyanate in a weight ratio of 80/20.
Claim 16
Dependent Claim
14 words
A process according to any preceding claim, wherein the flame-retardant (c) comprises tris(1,3-dichloropropyl) phosphate.
Claim 17
Dependent Claim
14 words
A process according to any preceding claim, wherein the flame-retardant (c) comprises tris(2-chloroethyl) phosphate.
Claim 18
Dependent Claim
14 words
A process according to any preceding claim, wherein the flame-retardant (c) comprises tetrakis(2-chloroethyl)ethylene diphosphate.
Claim 19
Dependent Claim
17 words
A process according to any preceding claim, wherein the flame-retardant (c) comprises tetrakis(2-chloroethyl)ethylene diphosphate and decabromodiphenyl oxide.
Claim 20
Dependent Claim
30 words
A process according to any preceding claim, wherein the amount of flame retardant (c) is 50 to 145 parts by weight, per 100 parts by weight of polyether polyol (a).
Claim 21
Dependent Claim
32 words
A process according to any preceding claim, wherein the amount of low-viscosity linear polyester polyol (g) is 35 to 80 parts by weight, per 100 parts by weight of polyether polyol (a).
Claim 22
Dependent Claim
30 words
A process according to any preceding claim, wherein the amount of hydrated alumina (h) is 230 to 350 parts by weight, per 100 parts by weight of polyether polyol (a).
Claim 23
Dependent Claim
19 words
A flexible resilient flame-retardant and intumescent polyurethane foam product, when made by a process according to any preceding claim.
References Cited (Backward Citations)
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