GB2400370A - Process for producing formulations of graphitised cold moulded flexible polyurethane foam - Google Patents
Process for producing formulations of graphitised cold moulded flexible polyurethane foam Download PDFInfo
- Publication number
- GB2400370A GB2400370A GB0308284A GB0308284A GB2400370A GB 2400370 A GB2400370 A GB 2400370A GB 0308284 A GB0308284 A GB 0308284A GB 0308284 A GB0308284 A GB 0308284A GB 2400370 A GB2400370 A GB 2400370A
- Authority
- GB
- United Kingdom
- Prior art keywords
- graphitised
- fire
- flexible polyurethane
- nco
- isocyanate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0008—Foam properties flexible
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
In order to overcome the difficulties imposed by the requirements of the international market (KVNS 66041 standard) regarding the performance of foams in conditions of fire, toxicity or opacity, two formulations were developed, in which a special expanding graphite was deployed (it is capable of expanding 250-fold compared with its initial volume), which is obtained by adding to polyol-polyether, which improves not only its performance in conditions of fire but also gives a sufficiently impressive reduction in the amount of smoke produced, also its toxicity. Its use is especially favoured when filling out railway carriages, in particular seats.
Description
DESCRIPTION
PROCESS FOR PRODUCING FORMULATIONS OF GRAPHITISED, COLD-MOULDED
FLEXIBLE POLYURETHANE FOAM
SCOPE OF THE INVENTION
This invention is concerned with a process for producing formulations of graphitised, cold- moulded, flexible polyurethane foam which meets the standards STM-C-708 (SNCF), BS 6853: 1999/BS 476 parts 6 & 7, also the KVNS 6604D specification, displaying an index limit of oxygen (ILO) 2 28.
Use of these formulations of graphitised foam is especially favoured when fitting out railway carriages, in particular seats.
DETAILED DESCRIPTION OF THE INVENTION
This invention is concerned with a process for producing formulations of graphitised, cold- moulded flexible polyurethane foam.
In order to overcome the difficulties imposed by the requirements of the international market (KVNS 66041 standard) regarding the performance of foams in conditions of fire, toxicity or opacity, two formulations were developed, in which a special expanding graphite was deployed (it Is capable of expanding 250- fold compared with its initial volume), which is produced by adding to polyol-polyether.
This foam includes in its formulation an additive of expandable graphite, whose purity level approaches 99%, which acts as a fire barrier and which, when combined with fire-retardants, enables it to achieve greater efficiency of performance in conditions of smoke and/or fire.
Expandable graphite is based on flakes of natural graphite with added acids, with a particulate size of min. 80% > 0.3mm. This graphite is added to Activated Polyol (a polyol to À c e e e e which catalysts, stabilizers, reticulates, etc. had been previously added), which maintain their stability by continuous stirring in order to prevent sedimentation.
The graphite's action is enhanced by deploying a compound of phosphorous in the formulation.
The graphitised flexible polyurethane foam is the result of two principal reactions, namely: a poly-addition reaction between the polyol-polyether and the poly-isocyanate: OH-R-OH-+OCN-R'-NCO + GRAPHITE LOAD- - C - N R'- N - C - OR - 0 polyol di-isocyanate I H H O n
POLYURETHANE
and the poly-condensation reaction between the water and the poly-diisocyanate: 2HOH + OCN - R - NCO H2N - R - NH2 + 2 C02 (water) Dl-ISOCYANATE DIAMINE CARBON DIOXIDE + 2 (OCN - R- NCO) OCN - R - IN - ICl - IN - R - A- ICl - IN - R - NCO
H O H H O H
(di-iscoyanate polyurea) The load of expandable graphite of a specific type, also the phosphorous compound had been previously added to the polyol.
The quantity of graphite to be used varies between 25 and 40 parts by weight (p.p.).
Among the fire-retardants used, as well as the phosphorous compound already mentioned, brominated compounds may also be used.
À: t. l: eee: re t :. :. e: À.. : Foams produced by the process according to the invention enable tests for performance in smoke and/or fire according to the standards ASTM - C - 708 (SNCF), BS 6853/BS 476 and AFNOR X 10 - 702 -1, parts 2 and 5, to be passed, corresponding to NBS ASTM E662 and NF (20- 902/1990).
PREFERRED EMBODIMENTS ACCORDING TO THE INVENTION
In the light of tests earned out, the quantity of graphite to be used should not be less than 30 p.p. so as to satisfy the international market in the railways sector. The process for producing formulations of foam according to the invention is illustrated in Fig. 1.
FIG. 1 Name of component Formulation 1 Formulation 2
PP PP
Polyol polyether 100 100 Water 3.0 3.6 Trietanolamine 5.7 5.7 Stabiliser (thermally active) 1.0 1.0 Reticulates 7.5 6.5 Amine catalyst 1.0 0.8 Fire-retardant 10 12 Expandable graphite 30- 40 DBTL 0.020 Polyisocyanate 48 50 References (Fin. 1) - Polyol Polyether available at HUNTSMAN POLYURETHANES.
- Triethanolamine 85% available at BP.
- Polysiloxane in an organic ester by TH GOLDSCHMIDT.
- Polyol polyether with medium functionality from DOW CHEMICALS.
- Triethylene-diamine from AIR PRODUCTS.
- TMCP (anti-blaze) available at ALBRIGHT and WILSON À: ce': À :e:. e: se. : Organo-metallic catalyst from ACIMA CHEMICAL INDUSTRIES Toluene mixture of di-isocyanate 80/20 (TDI) with diphenyl-methane di- isocyanate (MDI) c/43%, from the NCO groups at BAYER The foams produced using the formulations depicted in Fig. 1 were subjected to tests of their performance in fire and their classification for smoke, in accordance with the standards STM 708 and AFNOR -X10 -702 -1 (1995), parts 2 and 5.
The smoke classification refers to its opacity and toxicity.
Lisbon, on behalf of FAURECIA - ASSENTOS DE AUTOMOVEL Lda.
Claims (2)
1. Process for producing a formulation for graphitised, cold-moulded, flexible polyurethane foam characterised by a graphitised foam produced by the poly-addition reaction between the polyol-polyether and the polyisocyanate: OH-R-OH- +OCN-R'-NCO + GRAPHITE LOAD -- C - N - R' - N - C OR - O - r Polyol Di-isocyanate I H H O n
POLYURETHANE
and displays an Index Limit of Oxygen (iLO) = 28%, Speed of the spread of fire: v = 27 mm/see, Classification of fire: Does not spread Smoke classification: Class F2.
2. Process for producing a formulation for graphitised, cold-moulded flexible polyurethane foam characterised by a graphitised foam produced by the poly condensation reaction between water and the poly-di- isocyanate: 2HOH + OCN - R - NCO H2N - R - NH2 + 2 C02 (water) Dl-ISOCYANATE | DIAMINE CARBON DIOXIDE |+ 2 (OCN - R - NCO)
OCN-R-N-C-N-R-N-C-N-R-NCO
1! 1 1 I!
H O H H O H
(di-isocyanate polyurea) and displays an index > 31% and Speed of the spread of fire: : All: f t ct À À À l À À À v = 20 mm/sec.
Classification of fire: Does not spread Classification of smoke: Class F2.
Lisbon, on behalf ofFAURECIA-ASSENTOSDEAOTMOVELLDA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0308284A GB2400370A (en) | 2003-04-10 | 2003-04-10 | Process for producing formulations of graphitised cold moulded flexible polyurethane foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0308284A GB2400370A (en) | 2003-04-10 | 2003-04-10 | Process for producing formulations of graphitised cold moulded flexible polyurethane foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0308284D0 GB0308284D0 (en) | 2003-05-14 |
| GB2400370A true GB2400370A (en) | 2004-10-13 |
Family
ID=9956551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0308284A Withdrawn GB2400370A (en) | 2003-04-10 | 2003-04-10 | Process for producing formulations of graphitised cold moulded flexible polyurethane foam |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2400370A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008155249A1 (en) * | 2007-06-20 | 2008-12-24 | Wacker Chemie Ag | Polyurethane foam containing silicon |
| JP2019178207A (en) * | 2018-03-30 | 2019-10-17 | マツダ株式会社 | Two liquid reaction type urethane resin composition and method for manufacturing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168706A (en) * | 1984-12-20 | 1986-06-25 | Dunlop Ltd | Flexible flame-retardant polyurethane foams |
-
2003
- 2003-04-10 GB GB0308284A patent/GB2400370A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2168706A (en) * | 1984-12-20 | 1986-06-25 | Dunlop Ltd | Flexible flame-retardant polyurethane foams |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008155249A1 (en) * | 2007-06-20 | 2008-12-24 | Wacker Chemie Ag | Polyurethane foam containing silicon |
| CN101679592B (en) * | 2007-06-20 | 2012-06-06 | 瓦克化学股份公司 | Polyurethane foam containing silicon |
| JP2019178207A (en) * | 2018-03-30 | 2019-10-17 | マツダ株式会社 | Two liquid reaction type urethane resin composition and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0308284D0 (en) | 2003-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |