EP1287066A1 - Flammwidrige intumeszierende mischungen - Google Patents
Flammwidrige intumeszierende mischungenInfo
- Publication number
- EP1287066A1 EP1287066A1 EP01951480A EP01951480A EP1287066A1 EP 1287066 A1 EP1287066 A1 EP 1287066A1 EP 01951480 A EP01951480 A EP 01951480A EP 01951480 A EP01951480 A EP 01951480A EP 1287066 A1 EP1287066 A1 EP 1287066A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixture according
- polymer
- mixtures
- weight
- flame
- 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- Withdrawn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
- 239000000203 mixture Substances 0.000 title claims abstract description 76
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 30
- 239000010439 graphite Substances 0.000 claims abstract description 30
- 229920000642 polymer Polymers 0.000 claims abstract description 26
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 11
- 239000000178 monomer Substances 0.000 claims abstract description 11
- 239000012764 mineral filler Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000005977 Ethylene Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000002378 acidificating effect Effects 0.000 claims abstract description 6
- 239000003063 flame retardant Substances 0.000 claims description 15
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 6
- 238000005253 cladding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims 6
- 229910001853 inorganic hydroxide Inorganic materials 0.000 claims 1
- 229910052809 inorganic oxide Inorganic materials 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 18
- 229920003346 Levapren® Polymers 0.000 description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 229920002943 EPDM rubber Polymers 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000005060 rubber Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- XMNDMAQKWSQVOV-UHFFFAOYSA-N (2-methylphenyl) diphenyl phosphate Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C=CC=CC=1)OC1=CC=CC=C1 XMNDMAQKWSQVOV-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 235000021355 Stearic acid Nutrition 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 4
- 239000008117 stearic acid Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000007706 flame test Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical class [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 241001441571 Hiodontidae Species 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003110 anti-inflammatory effect Effects 0.000 description 1
- 229940058905 antimony compound for treatment of leishmaniasis and trypanosomiasis Drugs 0.000 description 1
- 150000001463 antimony compounds Chemical class 0.000 description 1
- RPJGYLSSECYURW-UHFFFAOYSA-K antimony(3+);tribromide Chemical compound Br[Sb](Br)Br RPJGYLSSECYURW-UHFFFAOYSA-K 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000005043 ethylene-methyl acrylate Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical class [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 235000012254 magnesium hydroxide Nutrition 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000010198 maturation time Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010060 peroxide vulcanization Methods 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
- 238000010059 sulfur vulcanization Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to mixtures containing
- a polymer which can be prepared from ethylene, vinyl acetate and optionally further monomers with a vinyl acetate content in the range from 40 to 85% by weight,
- Flame-retardant intumescent mixtures are to be understood as foaming, flame-retardant mixtures, that is to say mixtures which foam to a certain extent under the action of fire and have flame-retardant properties.
- Such mixtures can be used, for example, in building joints and cable breakthroughs, cavities, holes, transitions and connections between building walls or fire protection components such as cladding to prevent the fire, fire gases and smoke from being transmitted in the event of a fire.
- Components made from such mixtures therefore serve as preventive fire protection.
- the expansion behavior of such compounds in the event of a fire can also contribute in particular to maintaining the shape or function of, for example, ceiling cladding and wall cladding, because the components are pressed together by inflating profiles and sealing pieces.
- Such mixtures must have other properties, e.g. Water resistance. Therefore, conventional flame retardants such as water-soluble polyphosphates are mostly undesirable. The extent of foaming must remain unchanged even over very long storage times.
- JP-B-95068362 It is known from JP-B-95068362 to use expandable graphite as a flame-retardant component in mixtures of vulcanized acrylate rubber.
- JP-B2-95103948 describes expandable graphite acrylate rubber vulcanizates for the manufacture of flame-retardant hoses.
- JP-A-10036572 describes expandable graphite rubber mixtures based on polychloroprene with a maximum of 30 phr (per hundred rubber) expandable graphite and thus to a small proportion of this filler.
- the use of halogen-containing components is no longer desirable today.
- JP-A-09176579 describes mixtures with EVA (10-50% VA) or m-PE with phosphorus and expanded graphite and mineral filler for adhesive tapes around pipes through wall openings. Red phosphorus is always used. However, processing red phosphorus is difficult. In addition, red phosphorus may continue to react even after processing.
- the object on which this invention was based was to find a phosphorus-free, in particular red phosphorus-free, mixture which passed the required fire protection tests and had sufficient expansion behavior, waterproof and allows simple shaping, for example via extrusion, calendering, press molding, etc.
- the moldings that can be produced should have sufficient dimensional stability, but should still be deformable to a certain extent in order to
- a further task was therefore the provision of non-vulcanized mixtures which have sufficient dimensional stability and which can still be deformed to a certain extent by the user.
- a polymer which can be prepared from ethylene, vinyl acetate and, if appropriate, further monomers with a vinyl acetate content in the range from 40 to 85% by weight,
- Ethylene-vinyl acetate copolymers are preferably used as polymer a).
- the polymers a) can be prepared by conventional methods, such as, for example, by radical copolymerization in solution, emulsion or mass.
- the copolymerized vinyl acetate content should advantageously be in the range from 50 to 85% by weight, mixtures of these polymers with different vinyl acetate contents also being able to be used.
- ethylene-vinyl acetate polymers which may optionally contain further co-monomers
- ethylene-methyl acrylate polymers which may also contain further co-monomers can also be used.
- an ethylene-vinyl acetate copolymer or an ethylene-methyl acrylate copolymer should advantageously be used.
- the highest flame retardancy is achieved with particularly high levels of polar comonomer.
- Possible additional comonomers which may be present are, in particular, vinyl esters of higher carboxylic acids and also longer-chain (meth) acrylates, the content of these monomers in the polymer, as a rule, the higher the more nonpolar, organic groups in the polymer in order to ensure the desired flame resistance are included. CO is also mentioned as a monomer unit.
- the glass transition temperature of the terpolymers thus available must be taken into account. If this is at room temperature or above room temperature, mixtures made with them are usually brittle at the typical operating temperatures and are therefore problematic in use.
- the flexibility of moldings from the mixtures according to the invention can of course also be influenced by adding plasticizing additives mentioned below.
- expandable graphites which are formed by sulfation or nitration of graphite, can advantageously be used as expandable graphite b).
- These expandable graphites are known to the person skilled in the art and can be used to achieve flame retardancy in sealants, coatings and in general in thermoplastics. Typical is e.g. an application with polyurethanes (see brochure short delivery program flame retardants, fire protection articles from Nordmarm and Rassmann from January 2000).
- Expandable graphites are layered graphites that are reacted with sulfuric acid or nitric acid or generally strong acids under oxidizing conditions. Water-soluble salts are formed in the graphite layer lattice. The reaction with sulfuric acid and H 2 O 2 is typical. These reaction products are then usually washed acid-free with water, the amount of remaining acid should be measured below 1 mg / g as KOH.
- Neutral expanded graphites are obtained by an additional neutralization (eg with sodium hydroxide solution or ammonia), this material also being washed again in order to remove adhering neutralizing agent. Neutral types have a pH of at least 6.
- expanded graphite for fire protection is based on 1. the ability to expand when exposed to heat. This expansion can be up to over 200 ml per g and creates a large surface area. Oxidation quickly removes oxygen from the immediate surroundings, thereby extinguishing fire. 2. Expandable graphite does not generate a flame during oxidation and extinguishes immediately when the flame is removed. The expansion in the event of a fire closes joints and breakthroughs and thereby prevents the fire from spreading. In principle, the person skilled in the art is aware of the criteria according to which expanded graphites must be selected in order to determine the expandability and the start of the expansion. In this context, the particle size and the type of
- Intercalates which can mostly be sulfuric acid or nitric acid or less often acetic acid.
- acidic expandable graphites there are still residues of acids
- alkaline expandable graphites there are residues of bases, e.g. Sodium hydroxide solution included.
- the mineral fillers can be freely selected, with energy-consuming fillers such as aluminum hydroxides, magnesium hydroxides or calcium carbonate making additional contributions to flame retardancy.
- energy-consuming fillers such as aluminum hydroxides, magnesium hydroxides or calcium carbonate making additional contributions to flame retardancy.
- talc, silicas, silicates, carbonates and sulfates can also be used. Mixtures of the fillers mentioned can of course be used.
- Typical additives are processing aids, such as stearic acid, waxes, glide waxes, oils, and release agents or flame retardant additives are used, such as organophosphate, Ammom 'umpolyphosphate, antimony bromide, etc., halogen-containing flame retardants are less preferred. Water-soluble additives are less preferred for reasons of water resistance.
- non-neutralized expandable graphites are used together with ethylene-vinyl acetate copolymers, partial hydrolysis can occur with the formation of acetic acid.
- basic oxides and carbonates or other acid scavengers can advantageously be added.
- Non-polar, essentially saturated elastomers such as EPM, EPDM, butyl rubber, hydrogenated or partially hydrogenated SBR rubbers are also suitable as additives, but advantageously up to a maximum of half the amount of a).
- An advantage of the mixtures is that they allow a relatively wide variation in the amounts of expandable graphite and especially other mineral fillers, which are energy-consuming when exposed to fire. In this way, particularly high amounts of components b) and c) can be achieved.
- component b) can surprisingly be used in an amount in the range from 50 to 200 parts by weight and component c) in an amount in the range from 50 to 500 parts by weight, in each case based on 100 parts by weight a), without the sacrifice good properties, especially mechanical and processing properties. This means that high fire behavior requirements can be met.
- Mixture can be influenced favorably, since mineral fillers are usually relatively cheap.
- the polymers a) used additionally probably have the function of an effective binder, which allows large amounts of filler, including
- Another object of the invention is a process for the preparation of the mixtures according to the invention by the individual components in any order in a conventional mixing unit, such as an internal mixer
- roller, a screw or a kneader mixes. It may be advantageous to cool during the mixing process to prevent the mixture from becoming too hot.
- the polymers a) according to the invention allow the preparation of a mixture without the use of excessive shear forces which could adversely affect the structure of the expanded graphite.
- Another object of the invention is the use of the mixture for
- the moldings can be produced by continuous processes, since the mixtures have a sufficiently wide processing window in the processing processes. This means that premature foaming during molding can be avoided.
- Extrusion, optionally multi-layer extrusion and calendering are preferred processing methods.
- the shaped bodies mentioned are a further subject of the invention. It may be necessary to vulcanize the mixtures according to the invention to produce the moldings. This is done in a manner known to those skilled in the art and is e.g. in "Vulkanisation & Vulkanisationsakusstoff (W. Hofmann, Leverkusen 1965, pp. 85ff, 225 ff). The vulcanization system must be selected according to the type of polymer a).
- Another object of the invention are flame-retardant, intumescent mixtures containing a mixture according to the invention.
- Levapren® 700 HV ethylene-vinyl acetate copolymer with 70% by weight
- Vinyl acetate from Bayer AG powdered with silica as granules, Mooney ML 1 + 4, 100 ° C 27 ME, MFI according to DIN 53735 (190 ° C, 2.16 kp) of approx. 2.5 g / 10 min.
- 2.Levapren® 800 HV ethylene-vinyl acetate copolymer with 80% by weight vinyl acetate from Bayer AG, powdered with silica as granules, Mooney ML 1 + 4, 100 ° C 26 ME, MFI according to DIN 53735 (190 ° C, 2.16 kp) of approx.3.0 g / 10 min.
- Apyral® B 120 aluminum hydroxide from United Aluminum Works
- Buna® EP G 6170 EPDM rubber from Bayer AG with an ethylene content of approx. 70%, an ENB content of approx. 1.5% and one
- Enerthene® 1849-1 plasticizer based on mineral oil from BP, aliphatic
- Disflamol® DPK plasticizer from Bayer AG based on diphenyl cresyl phosphate 9.
- Maglite D magnesium oxide from CP Hall Company
- Rhenosorb® CaO from Rheinchemie
- the amounts of the mixture components used were designed for a total of 200 to 300 g.
- the mixture was mixed on a laboratory roller at approx. 20 ° C. by introducing the polymer and first subjecting it to a few roller passes, then the stearic acid, expanded graphite and apyral were added in succession and the mixture after a total mixing time of 15 min. taken off the roller.
- Test specimens were pressed from the mixtures as indicated, two different pressing conditions being selected.
- test specimens were flexible and could be bent without breaking.
- Mixtures 1 a to 1 b show that mixtures of levapren and expandable graphite can also be filled with a flame-retardant filler such as Apyral. Easily processable mixtures are obtained which show a uniform intumescence in the flame test. They are particularly good here
- Mixtures 1 c and 1 d The formation of bubbles between dents in the flame test depends on the pressing conditions.
- the amount of apyral which can advantageously be used is obviously exceeded with 400 phr.
- the amount preferably being 50 phr or more.
- the mixtures were prepared as in Example 1, but the temperature was set to 50 ° C. during the preparation of the mixture.
- Processable mixtures with EPDM can only be obtained with expandable graphite quantities below 70 phr. Acceptable moldings could only be obtained after prolonged pressing, but blistering was then observed in the flame test.
- the mixtures were prepared as in Example 1.
- the feed materials were mixed in on the roller in the order given in the table.
- the rolling temperature was 20 ° C
- the pressing temperatures were 70
- Levapren 800 HV can be used for intumescent mixtures as well as Levapren 700 HV.
- the quality of the plates / test specimens was more homogeneous with Levapren 700 HV.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fireproofing Substances (AREA)
- Finishing Walls (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10024421 | 2000-05-19 | ||
| DE10024421A DE10024421A1 (de) | 2000-05-19 | 2000-05-19 | Flammwidrige intumeszierende Mischungen |
| PCT/EP2001/005144 WO2001088029A1 (de) | 2000-05-19 | 2001-05-07 | Flammwidrige intumeszierende mischungen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1287066A1 true EP1287066A1 (de) | 2003-03-05 |
Family
ID=7642561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01951480A Withdrawn EP1287066A1 (de) | 2000-05-19 | 2001-05-07 | Flammwidrige intumeszierende mischungen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7087670B2 (de) |
| EP (1) | EP1287066A1 (de) |
| JP (1) | JP2003533575A (de) |
| AU (1) | AU2001272395A1 (de) |
| CA (1) | CA2409019A1 (de) |
| DE (1) | DE10024421A1 (de) |
| WO (1) | WO2001088029A1 (de) |
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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2000
- 2000-05-19 DE DE10024421A patent/DE10024421A1/de not_active Withdrawn
-
2001
- 2001-05-07 AU AU2001272395A patent/AU2001272395A1/en not_active Abandoned
- 2001-05-07 US US10/276,866 patent/US7087670B2/en not_active Expired - Fee Related
- 2001-05-07 EP EP01951480A patent/EP1287066A1/de not_active Withdrawn
- 2001-05-07 WO PCT/EP2001/005144 patent/WO2001088029A1/de not_active Ceased
- 2001-05-07 CA CA002409019A patent/CA2409019A1/en not_active Abandoned
- 2001-05-07 JP JP2001585244A patent/JP2003533575A/ja active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| US7087670B2 (en) | 2006-08-08 |
| CA2409019A1 (en) | 2002-11-15 |
| DE10024421A1 (de) | 2001-11-22 |
| JP2003533575A (ja) | 2003-11-11 |
| AU2001272395A1 (en) | 2001-11-26 |
| WO2001088029A1 (de) | 2001-11-22 |
| US20030125447A1 (en) | 2003-07-03 |
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