JP5042449B2 - Flame retardant filter foam and method for producing the same - Google Patents
Flame retardant filter foam and method for producing the same Download PDFInfo
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- JP5042449B2 JP5042449B2 JP2004266542A JP2004266542A JP5042449B2 JP 5042449 B2 JP5042449 B2 JP 5042449B2 JP 2004266542 A JP2004266542 A JP 2004266542A JP 2004266542 A JP2004266542 A JP 2004266542A JP 5042449 B2 JP5042449 B2 JP 5042449B2
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- flame retardant
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- polyol
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- 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 title claims description 70
- 239000003063 flame retardant Substances 0.000 title claims description 69
- 239000006260 foam Substances 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 42
- 239000011496 polyurethane foam Substances 0.000 claims description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 36
- 229910002804 graphite Inorganic materials 0.000 claims description 36
- 239000010439 graphite Substances 0.000 claims description 36
- 229920005862 polyol Polymers 0.000 claims description 30
- 150000003077 polyols Chemical class 0.000 claims description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 25
- 229910052698 phosphorus Inorganic materials 0.000 claims description 24
- 239000011574 phosphorus Substances 0.000 claims description 24
- 230000035699 permeability Effects 0.000 claims description 18
- 239000005056 polyisocyanate Substances 0.000 claims description 16
- 229920001228 polyisocyanate Polymers 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 12
- 239000003381 stabilizer Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 11
- -1 ether polyols Chemical class 0.000 description 10
- 210000004027 cell Anatomy 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000005187 foaming Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 229910021382 natural graphite Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 239000012974 tin catalyst Substances 0.000 description 2
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- KYVBNYUBXIEUFW-UHFFFAOYSA-N 1,1,3,3-tetramethylguanidine Chemical compound CN(C)C(=N)N(C)C KYVBNYUBXIEUFW-UHFFFAOYSA-N 0.000 description 1
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 1
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 1
- FFMMKRBFLYKSMC-UHFFFAOYSA-N 9-hydroxy-8,10-dioxa-9lambda5-phosphatetracyclo[15.3.1.02,7.011,16]henicosa-1(21),2,4,6,11,13,15,17,19-nonaene 9-oxide Chemical compound C12=CC=CC=C2OP(O)(=O)OC2=CC=CC=C2C2=CC=CC1=C2 FFMMKRBFLYKSMC-UHFFFAOYSA-N 0.000 description 1
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- CEDDGDWODCGBFQ-UHFFFAOYSA-N carbamimidoylazanium;hydron;phosphate Chemical compound NC(N)=N.OP(O)(O)=O CEDDGDWODCGBFQ-UHFFFAOYSA-N 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- ZSFDBVJMDCMTBM-UHFFFAOYSA-N ethane-1,2-diamine;phosphoric acid Chemical compound NCCN.OP(O)(O)=O ZSFDBVJMDCMTBM-UHFFFAOYSA-N 0.000 description 1
- 239000004872 foam stabilizing agent Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- OOCYPIXCHKROMD-UHFFFAOYSA-M phenyl(propanoyloxy)mercury Chemical compound CCC(=O)O[Hg]C1=CC=CC=C1 OOCYPIXCHKROMD-UHFFFAOYSA-M 0.000 description 1
- XFZRQAZGUOTJCS-UHFFFAOYSA-N phosphoric acid;1,3,5-triazine-2,4,6-triamine Chemical compound OP(O)(O)=O.NC1=NC(N)=NC(N)=N1 XFZRQAZGUOTJCS-UHFFFAOYSA-N 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 235000011835 quiches Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Description
本発明は、難燃性フィルターフォームとその製造方法に関する。 The present invention relates to a flame retardant filter foam and a method for producing the same .
除膜した軟質ポリウレタンフォームは、除膜によって形成された三次元網状骨格構造による優れた通気性と濾過性を併せ持つことから、家電関係や自動車関係あるいは鉄道関係など、種々の分野においてフィルター材として使用されている。 The flexible polyurethane foam that has undergone film removal has excellent air permeability and filterability due to the three-dimensional network structure formed by film removal, so it can be used as a filter material in various fields such as home appliances, automobiles, and railways. Has been.
また、近年、一般用途、産業資材にかかわらず、用いる素材自体に対して高難燃化が要求されるようになり、除膜した軟質ポリウレタンフォームからなるフィルター材についても高い難燃性が求められている。例えば自動車関係ではFMVSS302、家電関係ではUL−94にてHBF、HF−2、HF−1のように高い難燃性の仕様がある。 In recent years, high flame resistance has been demanded for the materials themselves, regardless of general use or industrial materials, and high flame retardancy is also required for filter materials made of flexible polyurethane foam with film removal. ing. For example, FMVSS302 for automobiles and UL-94 for household appliances have high flame retardant specifications such as HBF, HF-2, and HF-1.
除膜した軟質ポリウレタンフォームに難燃性を付与する方法としては、ウレタンフォームの配合原料に難燃剤を添加して発泡後に除膜する方法と、除膜した軟質ポリウレタンフォームに後処理を施す方法がある。ウレタンフォームの配合原料に難燃剤を添加する方法としては、(1)ハロゲン系難燃剤あるいはリン系難燃剤の単独添加、(2)ハロゲン系難燃剤とリン系難燃剤の併用添加、(3)三酸化アンチモンとハロゲン系難燃剤の併用添加、(4)水酸化アルミニウムの添加がある。また、除膜した軟質ポリウレタンフォームに後処理を施す方法としては、(5)水酸化アルミニウムを含浸等でフォームの骨格に付着させる方法が挙げられる。 As a method for imparting flame retardancy to the film-removed flexible polyurethane foam, there are a method in which a flame retardant is added to the blended raw material of urethane foam and the film is removed after foaming, and a method in which the film-removed flexible polyurethane foam is post-treated. is there. As a method for adding a flame retardant to a raw material for urethane foam, (1) a halogen flame retardant or a phosphorus flame retardant is added alone, (2) a halogen flame retardant and a phosphorus flame retardant are added together, (3) There are combined addition of antimony trioxide and halogen flame retardant, and (4) addition of aluminum hydroxide. Moreover, as a method of post-processing the film-removed flexible polyurethane foam, (5) a method of attaching aluminum hydroxide to the foam skeleton by impregnation or the like can be mentioned.
しかし、前記(1)〜(4)の場合、すなわち難燃剤を配合原料に添加して発泡させた後に除膜する場合や、除膜後のフォームに(5)の後処理を行う場合には、次の問題を生じることが判明した。すなわち、(1)〜(3)の場合、除膜後の軟質ポリウレタンフォームは、三次元網状骨格構造からなって通気性が高いため、燃焼時に外部空気がフォーム内に供給され易くなって難燃性が低下し、添加した難燃剤では十分な難燃性を得るのが難しくなる。また(4)の場合、求められる高難燃性の基準を満たすためには水酸化アルミニウムを大量に添加しなければならないことから、良好に発泡できなくなってフォームを得るのが難しくなる。また(5)の場合には、軟質ポリウレタンフォームの除膜後に、後工程による含浸処理等が必要となるため、製造作業が面倒となるのみならず、水酸化アルミニウムが含浸付着することによりフィルターフォームが重くなる問題がある。
本発明は前記の点に鑑みなされたものであり、難燃性、軽量性及び通気性に優れ、しかも製造作業が容易な難燃性フィルターフォームを提供する。 The present invention has been made in view of the above points, and provides a flame retardant filter foam that is excellent in flame retardancy, light weight, and air permeability and that can be easily manufactured.
請求項1の発明は、ポリオールとポリイソシアネートの反応により得られた軟質ポリウレタンフォームを除膜した軟質ポリウレタンフォームに膨張黒鉛が含まれてなる難燃性フィルターフォームであって、前記除膜した軟質ポリウレタンフォームにリン系難燃剤と整泡剤が含まれ、前記除膜した軟質ポリウレタンフォームに含まれる前記膨張黒鉛の量が、前記ポリオール100重量部当たり18〜55重量部であり、前記リン系難燃剤の量が、前記ポリオール100重量部当たり23重量部以下であり、かつ、前記除膜した軟質ポリウレタンフォームに含まれる膨張黒鉛と前記リン系難燃剤の重量比が、膨張黒鉛:リン系難燃剤=5:1〜1:1であり、前記整泡剤がシリコーン化合物からなり、前記難燃性フィルターフォームの密度が8〜40kg/m3、通気度が50L/min以上であることを特徴とする難燃性フィルターフォームに係る。 The invention of claim 1 is a flame-retardant filter foam comprising a soft polyurethane foam obtained by removing a soft polyurethane foam obtained by a reaction between a polyol and a polyisocyanate and containing expanded graphite, wherein the film-free soft polyurethane A phosphorus flame retardant and a foam stabilizer are contained in the foam, and the amount of the expanded graphite contained in the removed flexible polyurethane foam is 18 to 55 parts by weight per 100 parts by weight of the polyol, and the phosphorus flame retardant The weight ratio of expanded graphite and phosphorus-based flame retardant contained in the film-removed flexible polyurethane foam is not more than 23 parts by weight per 100 parts by weight of the polyol, and the weight ratio of expanded graphite: phosphorous flame retardant = 5: 1 to 1: 1, wherein the foam stabilizer is a silicone compound, the density of the flame retardant filter form 8 0 kg / m 3, air permeability according to the flame-retardant filter form, characterized in that at 50L / min or more.
請求項2の発明は、ポリオールとポリイソシアネートと膨張黒鉛を含む配合原料を混合撹拌して前記ポリオールとポリソシアネートの反応により得た軟質ポリウレタンフォームに対し除膜処理を行う難燃性フィルターフォームの製造方法であって、前記配合原料にはリン系難燃剤とシリコーン化合物からなる整泡剤とを含み、前記膨張黒鉛の量が、前記ポリオール100重量部当たり18〜55重量部であり、前記リン系難燃剤の量が、前記ポリオール100重量部当たり23重量部以下であり、かつ、前記膨張黒鉛と前記リン系難燃剤の重量比が、膨張黒鉛:リン系難燃剤=5:1〜1:1であり、前記難燃性フィルターフォームの密度が8〜40kg/mAccording to a second aspect of the present invention, there is provided a flame retardant filter foam in which a blended raw material containing a polyol, a polyisocyanate, and expanded graphite is mixed and stirred to remove a film from a flexible polyurethane foam obtained by the reaction between the polyol and the polysocyanate. In the production method, the blended raw material contains a phosphorus flame retardant and a foam stabilizer made of a silicone compound, and the amount of the expanded graphite is 18 to 55 parts by weight per 100 parts by weight of the polyol. The amount of the flame retardant is 23 parts by weight or less per 100 parts by weight of the polyol, and the weight ratio of the expanded graphite to the phosphorus flame retardant is expanded graphite: phosphorous flame retardant = 5: 1 to 1: 1 and the density of the flame retardant filter foam is 8 to 40 kg / m 33 、通気度が50L/min以上であることを特徴とする難燃性フィルターフォームの製造方法に係る。Further, the present invention relates to a method for producing a flame retardant filter foam, wherein the air permeability is 50 L / min or more.
請求項1の難燃性フィルターフォームによれば、燃焼時に膨張黒鉛が膨張して除膜後のセルが塞がれるため、外部の空気からフォーム内が遮断され、高い難燃性を発揮することができる。しかも、水酸化アルミニウムを大量に含有させる場合と比べて重量増加が少なく、軽量であり、さらに含浸のための後処理が不要なため製造作業が容易である。 According to the flame retardant filter foam of claim 1, since the expanded graphite expands during combustion and the cell after film removal is blocked, the inside of the foam is blocked from outside air and exhibits high flame retardancy. Can do. In addition, the weight increase is small compared to the case where a large amount of aluminum hydroxide is contained, the weight is light, and the post-treatment for impregnation is unnecessary, so that the manufacturing operation is easy.
請求項1の難燃性フィルターフォームによれば、膨張黒鉛の他にリン系難燃剤が含まれているため、難燃性が一層向上する。 According to the flame retardant filter foam of the first aspect, since the phosphorus-based flame retardant is contained in addition to the expanded graphite, the flame retardancy is further improved.
請求項1の難燃性フィルターフォームによれば、フィルターフォームの密度が8〜40kg/m3からなるため、軽量であり、また、通気度が50L/min以上からなるため、通気性に優れ、その優れた通気性により濾過抵抗が低下し、濾過性能が向上する。 According to the flame retardant filter foam of claim 1, since the density of the filter foam is 8 to 40 kg / m 3 , the filter foam is lightweight, and since the air permeability is 50 L / min or more, the air permeability is excellent. The excellent air permeability reduces the filtration resistance and improves the filtration performance.
以下本発明の実施形態について説明する。本発明の難燃性フィルターフォームは、除膜した軟質ポリウレタンフォームに膨張黒鉛が含まれたものからなる。前記難燃性フィルターフォームの密度(JIS K 6400準拠)は、8〜40kg/m3が好ましく、より好ましくは12〜50kg/m3である。密度が8kg/m3より低い場合は、セル骨格の密度が小さくなりすぎて燃焼性が高くなる。それに対して、密度が40kg/m3より高い場合には、軽量性が損なわれるようになる。また前記難燃性フィルターフォームの通気度(ASTM D 3574テストD準拠)は、50L/min以上が好ましい。通気度が50L/minよりも低い場合には、濾過抵抗が大きくなりすぎて濾過効率が悪くなる。なお、通気度の上限値は限定されないが、特に好ましい上限値は280L/minである。 Embodiments of the present invention will be described below. The flame-retardant filter foam of the present invention comprises a film-extracted soft polyurethane foam containing expanded graphite. Density of the flame retardant filter form (JIS K 6400-compliant) is preferably 8~40kg / m 3, more preferably from 12~50kg / m 3. When the density is lower than 8 kg / m 3 , the density of the cell skeleton becomes too small and the combustibility becomes high. On the other hand, when the density is higher than 40 kg / m 3 , the lightness is impaired. Further, the air permeability (according to ASTM D 3574 test D) of the flame retardant filter foam is preferably 50 L / min or more. When the air permeability is lower than 50 L / min, the filtration resistance becomes too large and the filtration efficiency is deteriorated. The upper limit value of the air permeability is not limited, but a particularly preferable upper limit value is 280 L / min.
前記除膜した軟質ポリウレタンフォームは、軟質ポリウレタンフォームのセル膜(気泡膜)が公知の除膜処理により除去されたものである。除膜処理としては、熱、オゾン、アルカリ等による後処理を挙げることができる。除膜処理によって、軟質ポリウレタンフォームはセル膜のほとんどが除去され、三次元網状骨格構造になる。 The film-removed flexible polyurethane foam is obtained by removing a cell film (bubble film) of the flexible polyurethane foam by a known film removal treatment. Examples of the film removal treatment include post-treatment with heat, ozone, alkali and the like. By the film removal treatment, most of the cell membrane is removed from the flexible polyurethane foam to form a three-dimensional network skeleton structure.
除膜される前の軟質ポリウレタンフォームは、ポリオールとポリイソシアネートとの反応により得られる軟質ポチウレタンフォームからなり、前記軟質ポリウレタンフォームに膨張黒鉛と、好ましくはリン系難燃剤が含有されている。 The flexible polyurethane foam before film removal is made of a soft polyurethane foam obtained by a reaction between a polyol and a polyisocyanate, and the soft polyurethane foam contains expanded graphite and preferably a phosphorus-based flame retardant.
ポリオールとしては、軟質ポリウレタンフォーム用として知られているエーテル系ポリオールまたはエステル系ポリオールを単独で、または複数混合して用いることができる。 As the polyol, ether-based polyols or ester-based polyols known for flexible polyurethane foams can be used alone or in combination.
エーテル系ポリオールとしては、エチレングリコール、ジエチレングリコール、プロピレングリコール、ジプロピレングリコール、ブチレングリコール、ネオペンチルグリコール、グリセリン、ペンタエリスリトール、トリメチロールプロパン、ソルビトール、シュークロース等の多価アルコールにエチレンオキサイド、プロピレンオキサイド等のアルキレンオキサイドを付加したポリエーテルポリオールを挙げることができる。 Examples of ether polyols include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, neopentyl glycol, glycerin, pentaerythritol, trimethylolpropane, sorbitol, sucrose, and other polyhydric alcohols such as ethylene oxide and propylene oxide. The polyether polyol which added the alkylene oxide of this can be mentioned.
エステル系ポリオールとしては、マロン酸、コハク酸、アジピン酸等の脂肪族カルボン酸やフタル酸等の芳香族カルボン酸と、エチレングリコール、ジエチレングリコール、プロピレングリコール等の脂肪族グリコール等とから重縮合して得られたポリエステルポリオールを使用することもできる。その他、ポリエーテルポリオール中でエチレン性不飽和化合物を重合させて得られるポリマーポリオールも使用することができる。 As ester polyols, polycondensation of aliphatic carboxylic acids such as malonic acid, succinic acid and adipic acid, and aromatic carboxylic acids such as phthalic acid, and aliphatic glycols such as ethylene glycol, diethylene glycol and propylene glycol, etc. The obtained polyester polyol can also be used. In addition, a polymer polyol obtained by polymerizing an ethylenically unsaturated compound in a polyether polyol can also be used.
ポリイソシアネートとしては、イソシアネート基を2以上有する脂肪族系または芳香族系ポリイソシアネート、それらの混合物、およびそれらを変性して得られる変性ポリイソシアネートを使用することができる。 As the polyisocyanate, aliphatic or aromatic polyisocyanates having two or more isocyanate groups, mixtures thereof, and modified polyisocyanates obtained by modifying them can be used.
脂肪族系ポリイソシアネートとしては、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、ジシクロヘキサメタンジイソシアネート等が挙げられる。芳香族ポリイソシアネートとしては、トルエンジイソシアネート、ジフェニルメタンジイソシアネート、ナフタレンジイソシアネート、キシリレンジイソシアネート、ポリメリックポリイソシアネート(クルードMDI)等が挙げられる。その他プレポリマーも使用することができる。 Examples of the aliphatic polyisocyanate include hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexamethane diisocyanate. Examples of the aromatic polyisocyanate include toluene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate, xylylene diisocyanate, polymeric polyisocyanate (crude MDI), and the like. Other prepolymers can also be used.
膨張黒鉛は、公知のものを使用でき、原料黒鉛に特に制限はないが、天然黒鉛、キッシュ黒鉛、熱分解黒鉛等のように、高度に結晶が発達した黒鉛が好ましいものとして挙げられる。さらには、得られる特性と経済性のバランスを考慮すると、天然黒鉛が好ましい。用いる天然黒鉛として特に制限はなく、SS−3N(住金ケミカル(株)製)、GREP−EG(東ソー(株)製)等の市販品を用いることができる。膨張黒鉛は平均粒径に特に制限はないが、ポリオール等との混合などを考慮すると、+50メッシュ80%以上の粉体が好ましい。 As the expanded graphite, a known one can be used, and the raw material graphite is not particularly limited, but graphite having highly developed crystals such as natural graphite, quiche graphite, and pyrolytic graphite is preferable. Furthermore, natural graphite is preferable in consideration of the balance between the obtained characteristics and the economical efficiency. There is no restriction | limiting in particular as natural graphite to be used, Commercial products, such as SS-3N (made by Sumikin Chemical Co., Ltd.) and GREP-EG (made by Tosoh Corp.), can be used. There is no particular limitation on the average particle diameter of expanded graphite, but considering the mixing with polyol and the like, a powder of +50 mesh 80% or more is preferable.
この発明では、前記膨張黒鉛の量は、ポリオール100重量部当たり、18〜55重量部、特には25〜35重量部の割合で軟質ポリウレタンフォームに含まれるのが好ましい。前記膨張黒鉛が上限の55重量部を超えると、軟質ポリウレタンフォームの発泡時に樹脂の流動性を損ねる傾向があり、一方、下限の18重量部未満の場合、軟質ポリウレタンフォームにおける膨張黒鉛の量が少なくなって、燃焼時に前記除膜後のセルを塞いで外部の空気から遮断する作用が低下し、良好な難燃性が得られなくなる。 In the present invention, the amount of the expanded graphite is preferably contained in the flexible polyurethane foam at a ratio of 18 to 55 parts by weight, particularly 25 to 35 parts by weight, per 100 parts by weight of polyol. If the expanded graphite exceeds the upper limit of 55 parts by weight, the fluidity of the resin tends to be impaired when the flexible polyurethane foam is foamed. On the other hand, if the expanded graphite is less than 18 parts by weight, the amount of expanded graphite in the flexible polyurethane foam is small. Thus, the action of blocking the cell after film removal and blocking from the outside air at the time of combustion is lowered, and good flame retardancy cannot be obtained.
リン系難燃剤は、特に限定されるものではなく、トリフェニルホスフェート、トリクレジルホスフェート、ビス(1,3−フェニレンジフェニル)ホスフェートなどの化合物、リン酸トリアリール、リン酸トリアルキル、リン酸アルキルアリールなどの化合物、赤リン、ポリリン酸アンモニウム、リン酸エステル、リン酸メラミン、ポリリン酸メラミン、リン酸グアニジン及びエチレンジアミンリン酸塩等が挙げられる。ポリオール100重量部当たり23重量部以下が好ましく、また膨張黒鉛:リン系難燃剤の重量比は、5:1〜1:1、特には4:1〜2:1が好ましい。前記膨張黒鉛:リン系難燃剤の重量比5:1よりもリン系難燃剤の比率が低い場合には、リン系難燃剤の添加による難燃効果が得難くなる傾向にあり、また前記膨張黒鉛:リン系難燃剤の重量比1:1よりもリン系難燃剤の比率が高い場合には、このフィルターフォームの燃焼時に膨張黒鉛による難燃効果が低くなる。 The phosphorus-based flame retardant is not particularly limited, and compounds such as triphenyl phosphate, tricresyl phosphate, bis (1,3-phenylenediphenyl) phosphate, triaryl phosphate, trialkyl phosphate, alkyl phosphate Examples include compounds such as aryl, red phosphorus, ammonium polyphosphate, phosphate ester, melamine phosphate, melamine polyphosphate, guanidine phosphate, and ethylenediamine phosphate. It is preferably 23 parts by weight or less per 100 parts by weight of polyol, and the weight ratio of expanded graphite: phosphorous flame retardant is preferably 5: 1 to 1: 1, particularly 4: 1 to 2: 1. When the ratio of the phosphorus-based flame retardant is lower than the weight ratio of the expanded graphite: phosphorus-based flame retardant of 5: 1, the flame-retardant effect due to the addition of the phosphorus-based flame retardant tends to be difficult to obtain. When the ratio of the phosphorus-based flame retardant is higher than the weight ratio of the phosphorus-based flame retardant 1: 1, the flame retardant effect due to the expanded graphite is lowered when the filter foam is burned.
前記軟質ポリウレタンフォームにおいては、前記ポリオールとポリイソシアネートとの反応に際して発泡反応を良好にするため、整泡剤や触媒が添加され、また発泡反応や硬さ調整のためなどに適量の水が添加される。 In the flexible polyurethane foam, a foam stabilizer and a catalyst are added to improve the foaming reaction in the reaction between the polyol and the polyisocyanate, and an appropriate amount of water is added for the foaming reaction and hardness adjustment. The
整泡剤としては、シリコーン化合物からなるものが好ましい。特にはシリコーン化合物でも、ポリジメチルシロキサン鎖の数(N)が25〜100のものが好ましい。前記シリコーン化合物からなる整泡剤、特にポリジメチルシロキサン鎖の数(N)が25〜100の整泡剤は、整泡効果のみならず難燃助剤としても有効である。ポリジメチルシロキサン鎖の数(N)が25〜100の整泡剤の具体例として、品番:F−650、信越化学工業(株)製、品番:SZ−1136、日本ユニカー(株)製が挙げられる。前記シリコーン化合物からなる整泡剤の量は、前記ポリオール100重量部に対して0.5〜3重量部が好ましい。前記範囲よりも添加量が多いと、発泡後の軟質ポリウレタンフォームはクローズドセル(独立気泡)が多くなって、発泡後の放冷によって除膜処理前にフォームが収縮し、変形するようになる。 As a foam stabilizer, what consists of a silicone compound is preferable. In particular, a silicone compound having a polydimethylsiloxane chain number (N) of 25 to 100 is preferable. The foam stabilizer made of the silicone compound, particularly the foam stabilizer having a polydimethylsiloxane chain number (N) of 25 to 100 is effective not only as a foam regulating effect but also as a flame retardant aid. Specific examples of foam stabilizers having a polydimethylsiloxane chain number (N) of 25 to 100 include product number: F-650, manufactured by Shin-Etsu Chemical Co., Ltd., product number: SZ-1136, manufactured by Nippon Unicar Co., Ltd. It is done. The amount of the foam stabilizer made of the silicone compound is preferably 0.5 to 3 parts by weight with respect to 100 parts by weight of the polyol. When the addition amount is larger than the above range, the foamed flexible polyurethane foam has a large number of closed cells (closed cells), and the foam shrinks and deforms before film removal treatment due to cooling after foaming.
触媒としては、軟質ポリウレタンフォーム用の公知のものが使用される。例えば、トリエチルアミン、トリエチレンジアミン、テトラメチルグアニジン等のアミン触媒や、ジブチルチンジラウレート、スタナスオクトエート等の錫触媒や、フェニル水銀プロピオン酸塩あるいはオクテン酸鉛等の金属触媒(有機金属触媒とも称される。)が挙げられる。 As the catalyst, known ones for flexible polyurethane foams are used. For example, amine catalysts such as triethylamine, triethylenediamine, and tetramethylguanidine, tin catalysts such as dibutyltin dilaurate and stannous octoate, metal catalysts such as phenylmercurypropionate and lead octenoate (also referred to as organometallic catalysts) ).
なお、前記軟質ポリウレタンフォームの製造は、前記の原料を配合し、その配合原料を攪拌機で混合攪拌し、吐出して発泡させる、公知のポリウレタンフォームの製造方法により行われる。また、このようにして製造した軟質ポリウレタンフォームに対して除膜処理を行い、本発明の難燃性フィルターフォームを得る。 In addition, manufacture of the said flexible polyurethane foam is performed by the manufacturing method of the well-known polyurethane foam which mix | blends the said raw material, mixes and stirs the mixing | blending raw material with a stirrer, discharges and foams. Moreover, the film removal process is performed with respect to the flexible polyurethane foam manufactured in this way, and the flame-retardant filter foam of this invention is obtained.
以下実施例及び比較例について説明する。使用した原料は次の通りである。
・ポリオール:分子量3000、OH価56、品番GP3000、三洋化成工業(株)製
・アミン触媒:品番LV−33、中京油脂(株)製
・錫触媒:品番MRH−110、城北化学工業(株)製
・シリコーン化合物からなる整泡剤:品番F−650、信越化学工業(株)製
・膨張黒鉛:粒径が+50メッシュ80%以上、品番SS−3N、住金ケミカル(株)製
・リン系難燃剤:品番CR−504、大八化学工業(株)製
・PVC(ポリ塩化ビニル):品番PVCペースト、新第一塩ビ(株)製
・三酸化アンチモン:品番PATOX、日本精鉱(株)製
・ポリイソシアネート:品番コロネート T−80、日本ポリウレタン工業(株)製
Examples and comparative examples will be described below. The raw materials used are as follows.
Polyol: molecular weight 3000, OH number 56, product number GP3000, manufactured by Sanyo Chemical Industries, Ltd. Amine catalyst: product number LV-33, manufactured by Chukyo Yushi Co., Ltd. Tin catalyst: product number MRH-110, Johoku Chemical Industry Co., Ltd. -Foam stabilizer made of silicone compound: Part number F-650, manufactured by Shin-Etsu Chemical Co., Ltd.-Expanded graphite: Particle size +50 mesh 80% or more, Part number SS-3N, manufactured by Sumikin Chemical Co., Ltd. Flame retardant: Part number CR-504, manufactured by Daihachi Chemical Industry Co., Ltd., PVC (polyvinyl chloride): Part number PVC paste, manufactured by Shin Daiichi PVC Co., Ltd., Antimony trioxide: Part number PATOX, manufactured by Nippon Seiko Co., Ltd. -Polyisocyanate: Product number Coronate T-80, manufactured by Nippon Polyurethane Industry Co., Ltd.
前記原料を表1の配合で混合し、公知のポリウレタンフォームスラブの製造方法にしたがい軟質ポリウレタンフォームを発泡させた。その際の手順を簡単に述べると、前記ポリオールに、前記ポリイソシアネート以外の原料を表1に示す割合で添加し、ミキサーを使用する公知の撹拌方法で混合して混合物を得た。得られた混合物を注入機のタンクに投入し、また同注入機の他のタンクに前記ポリイソシアネートを投入し、前記混合物とポリイソシアネートを高圧注入機のミキシングチャンバー内で混合、撹拌し、吐出してポリウレタンフォームスラブを得、そのポリウレタンフォームスラブの表皮以外の部分から、所要寸法のフォームを裁断した。このようにして得られたフォームに対し、実施例1〜5、参考例6及び比較例4については除膜処理を施してフィルターフォームとし、一方比較例1〜3及び比較例5については除膜処理を施すことなくフィルターフォームとした。 The said raw material was mixed by the mixing | blending of Table 1, and the flexible polyurethane foam was foamed according to the manufacturing method of the well-known polyurethane foam slab. Briefly describing the procedure, raw materials other than the polyisocyanate were added to the polyol at a ratio shown in Table 1, and mixed by a known stirring method using a mixer to obtain a mixture. The obtained mixture is put into a tank of an injector, and the polyisocyanate is put into another tank of the injector, and the mixture and polyisocyanate are mixed, stirred and discharged in a mixing chamber of a high-pressure injector. A polyurethane foam slab was obtained, and a foam having a required dimension was cut from a portion other than the skin of the polyurethane foam slab. The foams thus obtained were subjected to film removal treatment for Examples 1 to 5, Reference Example 6 and Comparative Example 4 to obtain filter foams, whereas for Comparative Examples 1 to 3 and Comparative Example 5, film removal was performed. A filter foam was obtained without any treatment.
前記のようにして得られた実施例品、参考例品及び比較例品に対して、通気度(ASTM D 3574テストD準拠)及び密度(JIS K 6400準拠)を測定した。さらに、難燃性基準HF−1に合格するか否かを調べた。測定結果は、表1の下部に示す通りである。実施例1〜5及び参考例6については、通気性が良好であると共に軽量であり、しかも難燃性基準HF−1に合格した。一方、除膜処理が行われていない比較例1〜3及び比較例5については、通気度が実施例1〜5及び参考例6と比べて低く、フィルターとして用いる場合、濾過抵抗が高くなって濾過効率が悪くなり、好ましいものではない。さらに、除膜処理されていない比較例1〜3及び比較例5にあっては、ポリウレタンフォームの発泡反応時における発生ガスによって形成される構造的に不安定なセル膜が残存するため、製造的にも構造的にも通気度を安定して管理することが難しく、フィルターとして好ましいものではない。また、膨張黒鉛及びリン系難燃剤に代えてPVCと三酸化アンチモンを含む比較例4、リン系難燃剤を含み膨張黒鉛を含まない比較例5については、難燃性基準HF−1に不合格であり、難燃性に劣っていた。なお、表1の比較例6は、密度18kg/m3のポリウレタンフォームに難燃剤として水酸化アルミニウム他を含浸させた難燃フォーム(品番UN−2、(株)イノアックコーポレーション製)単体からなるもの、比較例7は、密度18kg/m3のポリウレタンフォームに難燃剤として水酸化アルミニウム他を含浸させた難燃フォーム(品番UN−3、(株)イノアックコーポレーション製)単体からなるものであり、他の比較例と同様に比較例6及び7についても通気度、密度、難燃性を測定した。表1に示す測定結果から明らかなように、比較例6及び7は、密度が高く、軽量性に劣っていた。 The air permeability (according to ASTM D 3574 test D) and density (according to JIS K 6400) were measured for the example product, the reference example product and the comparative example product obtained as described above. Furthermore, it was investigated whether it passed the flame retardance standard HF-1. The measurement results are as shown in the lower part of Table 1. In Examples 1 to 5 and Reference Example 6, the air permeability was good and the weight was light, and the flame retardant standard HF-1 was passed. On the other hand, for Comparative Examples 1 to 3 and Comparative Example 5 where the film removal treatment is not performed, the air permeability is lower than those of Examples 1 to 5 and Reference Example 6, and when used as a filter, the filtration resistance is increased. Filtration efficiency deteriorates and is not preferable. Furthermore, in Comparative Examples 1 to 3 and Comparative Example 5 that have not been subjected to film removal treatment, the structurally unstable cell film formed by the gas generated during the foaming reaction of the polyurethane foam remains. In addition, it is difficult to stably control the air permeability structurally, which is not preferable as a filter. In addition, Comparative Example 4 containing PVC and antimony trioxide instead of expanded graphite and phosphorus-based flame retardant, and Comparative Example 5 including phosphorus-based flame retardant and not containing expanded graphite fail flammability standard HF-1. It was inferior in flame retardancy. Comparative Example 6 in Table 1 is composed of a flame retardant foam (Part No. UN-2, manufactured by Inoac Corporation), which is made by impregnating a polyurethane foam having a density of 18 kg / m 3 with aluminum hydroxide or the like as a flame retardant. Comparative Example 7 is composed of a flame retardant foam (part number UN-3, manufactured by Inoac Corporation), which is made by impregnating a polyurethane foam having a density of 18 kg / m 3 with aluminum hydroxide or the like as a flame retardant. As in the comparative example, the air permeability, density, and flame retardancy were also measured for comparative examples 6 and 7. As is apparent from the measurement results shown in Table 1, Comparative Examples 6 and 7 were high in density and inferior in lightness.
Claims (2)
前記除膜した軟質ポリウレタンフォームにリン系難燃剤と整泡剤が含まれ、
前記除膜した軟質ポリウレタンフォームに含まれる前記膨張黒鉛の量が、前記ポリオール100重量部当たり18〜55重量部であり、前記リン系難燃剤の量が、前記ポリオール100重量部当たり23重量部以下であり、かつ、前記除膜した軟質ポリウレタンフォームに含まれる膨張黒鉛と前記リン系難燃剤の重量比が、膨張黒鉛:リン系難燃剤=5:1〜1:1であり、
前記整泡剤がシリコーン化合物からなり、
前記難燃性フィルターフォームの密度が8〜40kg/m3、通気度が50L/min以上であることを特徴とする難燃性フィルターフォーム。 A flame retardant filter foam comprising expanded graphite contained in a soft polyurethane foam obtained by removing a flexible polyurethane foam obtained by a reaction between a polyol and a polyisocyanate ,
A phosphorus-based flame retardant and a foam stabilizer are included in the film-free flexible polyurethane foam,
The amount of the expanded graphite contained in the film-removed flexible polyurethane foam is 18 to 55 parts by weight per 100 parts by weight of the polyol, and the amount of the phosphorus flame retardant is 23 parts by weight or less per 100 parts by weight of the polyol. And the weight ratio of expanded graphite contained in the film-removed flexible polyurethane foam to the phosphorus flame retardant is expanded graphite: phosphorous flame retardant = 5: 1 to 1: 1.
The foam stabilizer comprises a silicone compound ;
A flame retardant filter foam, wherein the flame retardant filter foam has a density of 8 to 40 kg / m 3 and an air permeability of 50 L / min or more.
前記配合原料にはリン系難燃剤とシリコーン化合物からなる整泡剤とを含み、 The blending material includes a phosphorus flame retardant and a foam stabilizer made of a silicone compound,
前記膨張黒鉛の量が、前記ポリオール100重量部当たり18〜55重量部であり、前記リン系難燃剤の量が、前記ポリオール100重量部当たり23重量部以下であり、かつ、前記膨張黒鉛と前記リン系難燃剤の重量比が、膨張黒鉛:リン系難燃剤=5:1〜1:1であり、 The amount of the expanded graphite is 18 to 55 parts by weight per 100 parts by weight of the polyol, the amount of the phosphorus flame retardant is 23 parts by weight or less per 100 parts by weight of the polyol, and the expanded graphite and the The weight ratio of the phosphorus flame retardant is expanded graphite: phosphorus flame retardant = 5: 1 to 1: 1,
前記難燃性フィルターフォームの密度が8〜40kg/m The density of the flame retardant filter foam is 8 to 40 kg / m. 33 、通気度が50L/min以上であることを特徴とする難燃性フィルターフォームの製造方法。A method for producing a flame-retardant filter foam, wherein the air permeability is 50 L / min or more.
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