CN113354881A - Rubber composition for conveyor belt and conveyor belt - Google Patents
Rubber composition for conveyor belt and conveyor belt Download PDFInfo
- Publication number
- CN113354881A CN113354881A CN202110069775.4A CN202110069775A CN113354881A CN 113354881 A CN113354881 A CN 113354881A CN 202110069775 A CN202110069775 A CN 202110069775A CN 113354881 A CN113354881 A CN 113354881A
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- China
- Prior art keywords
- rubber
- conveyor belt
- mass
- parts
- flame retardant
- Prior art date
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- Granted
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 119
- 239000005060 rubber Substances 0.000 title claims abstract description 119
- 239000000203 mixture Substances 0.000 title claims abstract description 79
- 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 abstract description 46
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003063 flame retardant Substances 0.000 claims abstract description 34
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 34
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 32
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 32
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims abstract description 21
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052794 bromium Inorganic materials 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
- 229910052717 sulfur Inorganic materials 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 16
- 239000011593 sulfur Substances 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 125000001931 aliphatic group Chemical group 0.000 claims description 6
- 150000002898 organic sulfur compounds Chemical group 0.000 claims description 6
- 230000032683 aging Effects 0.000 abstract description 32
- 230000000694 effects Effects 0.000 description 24
- 238000012360 testing method Methods 0.000 description 18
- 239000010410 layer Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 125000004434 sulfur atom Chemical group 0.000 description 8
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical class CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 8
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical group C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- 244000043261 Hevea brasiliensis Species 0.000 description 6
- 229920000459 Nitrile rubber Polymers 0.000 description 6
- 229920003052 natural elastomer Polymers 0.000 description 6
- 229920001194 natural rubber Polymers 0.000 description 6
- 229960002447 thiram Drugs 0.000 description 6
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 description 5
- HLBZWYXLQJQBKU-UHFFFAOYSA-N 4-(morpholin-4-yldisulfanyl)morpholine Chemical compound C1COCCN1SSN1CCOCC1 HLBZWYXLQJQBKU-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- -1 tetrabromophthalate Chemical compound 0.000 description 5
- 238000004073 vulcanization Methods 0.000 description 5
- CPGFMWPQXUXQRX-UHFFFAOYSA-N 3-amino-3-(4-fluorophenyl)propanoic acid Chemical compound OC(=O)CC(N)C1=CC=C(F)C=C1 CPGFMWPQXUXQRX-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229920005549 butyl rubber Polymers 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000011162 core material Substances 0.000 description 4
- PGAXJQVAHDTGBB-UHFFFAOYSA-N dibutylcarbamothioylsulfanyl n,n-dibutylcarbamodithioate Chemical compound CCCCN(CCCC)C(=S)SSC(=S)N(CCCC)CCCC PGAXJQVAHDTGBB-UHFFFAOYSA-N 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 238000003878 thermal aging Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 description 3
- 125000001741 organic sulfur group Chemical group 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- FAXWFCTVSHEODL-UHFFFAOYSA-N 2,4-dibromophenol Chemical compound OC1=CC=C(Br)C=C1Br FAXWFCTVSHEODL-UHFFFAOYSA-N 0.000 description 2
- SSIZLKDLDKIHEV-UHFFFAOYSA-N 2,6-dibromophenol Chemical compound OC1=C(Br)C=CC=C1Br SSIZLKDLDKIHEV-UHFFFAOYSA-N 0.000 description 2
- TXLINXBIWJYFNR-UHFFFAOYSA-N 4-phenylpyridine-2-carbonitrile Chemical compound C1=NC(C#N)=CC(C=2C=CC=CC=2)=C1 TXLINXBIWJYFNR-UHFFFAOYSA-N 0.000 description 2
- 239000004709 Chlorinated polyethylene Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000012792 core layer Substances 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 125000005677 ethinylene group Chemical group [*:2]C#C[*:1] 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229920003049 isoprene rubber Polymers 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229920006295 polythiol Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- GRKDVZMVHOLESV-UHFFFAOYSA-N (2,3,4,5,6-pentabromophenyl)methyl prop-2-enoate Chemical compound BrC1=C(Br)C(Br)=C(COC(=O)C=C)C(Br)=C1Br GRKDVZMVHOLESV-UHFFFAOYSA-N 0.000 description 1
- GRPTWLLWXYXFLX-UHFFFAOYSA-N 1,1,2,2,3,3-hexabromocyclodecane Chemical compound BrC1(Br)CCCCCCCC(Br)(Br)C1(Br)Br GRPTWLLWXYXFLX-UHFFFAOYSA-N 0.000 description 1
- ORYGKUIDIMIRNN-UHFFFAOYSA-N 1,2,3,4-tetrabromo-5-(2,3,4,5-tetrabromophenoxy)benzene Chemical compound BrC1=C(Br)C(Br)=CC(OC=2C(=C(Br)C(Br)=C(Br)C=2)Br)=C1Br ORYGKUIDIMIRNN-UHFFFAOYSA-N 0.000 description 1
- VIHUMJGEWQPWOT-UHFFFAOYSA-N 1,2,3-tribromo-4-(3-bromophenoxy)benzene Chemical compound BrC1=CC=CC(OC=2C(=C(Br)C(Br)=CC=2)Br)=C1 VIHUMJGEWQPWOT-UHFFFAOYSA-N 0.000 description 1
- DEIGXXQKDWULML-UHFFFAOYSA-N 1,2,5,6,9,10-hexabromocyclododecane Chemical compound BrC1CCC(Br)C(Br)CCC(Br)C(Br)CCC1Br DEIGXXQKDWULML-UHFFFAOYSA-N 0.000 description 1
- YATIGPZCMOYEGE-UHFFFAOYSA-N 1,3,5-tribromo-2-[2-(2,4,6-tribromophenoxy)ethoxy]benzene Chemical compound BrC1=CC(Br)=CC(Br)=C1OCCOC1=C(Br)C=C(Br)C=C1Br YATIGPZCMOYEGE-UHFFFAOYSA-N 0.000 description 1
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical group CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- BDFBPPCACYFGFA-UHFFFAOYSA-N 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine Chemical compound BrC1=CC(Br)=CC(Br)=C1OC1=NC(OC=2C(=CC(Br)=CC=2Br)Br)=NC(OC=2C(=CC(Br)=CC=2Br)Br)=N1 BDFBPPCACYFGFA-UHFFFAOYSA-N 0.000 description 1
- DYIZJUDNMOIZQO-UHFFFAOYSA-N 4,5,6,7-tetrabromo-2-[2-(4,5,6,7-tetrabromo-1,3-dioxoisoindol-2-yl)ethyl]isoindole-1,3-dione Chemical compound O=C1C(C(=C(Br)C(Br)=C2Br)Br)=C2C(=O)N1CCN1C(=O)C2=C(Br)C(Br)=C(Br)C(Br)=C2C1=O DYIZJUDNMOIZQO-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000006237 Intermediate SAF Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 229920013585 Nipol® SBR Polymers 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- QHWKHLYUUZGSCW-UHFFFAOYSA-N Tetrabromophthalic anhydride Chemical compound BrC1=C(Br)C(Br)=C2C(=O)OC(=O)C2=C1Br QHWKHLYUUZGSCW-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920001276 ammonium polyphosphate Polymers 0.000 description 1
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 125000001246 bromo group Chemical group Br* 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 125000005678 ethenylene group Chemical group [H]C([*:1])=C([H])[*:2] 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 229920005555 halobutyl Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- CAYGQBVSOZLICD-UHFFFAOYSA-N hexabromobenzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1Br CAYGQBVSOZLICD-UHFFFAOYSA-N 0.000 description 1
- 125000004836 hexamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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)
- Belt Conveyors (AREA)
Abstract
The invention provides a rubber composition capable of forming a conveyor belt with excellent flame retardance and heat aging resistance, and a conveyor belt. The rubber composition for a conveyor belt of the present invention comprises: a rubber component containing butadiene rubber and styrene-butadiene rubber; antimony trioxide; and a bromine-based flame retardant, wherein the content of antimony trioxide is 1 to 10 parts by mass per 100 parts by mass of the rubber component, and the content of the bromine-based flame retardant is 5 to 40 parts by mass per 100 parts by mass of the rubber component.
Description
Technical Field
The present invention relates to a rubber composition for a conveyor belt and a conveyor belt.
Background
Conventionally, in iron works, chemical plants, and the like, belt conveyors are used to continuously convey conveyed materials such as raw materials. A belt conveyor is generally a device that transports a conveyed object by moving or rotating a belt (conveyor belt) by a driving device such as a roller.
As a rubber composition used for forming a covering rubber layer in such a conveyor belt, for example, patent document 1 discloses a rubber composition containing a rubber component such as butadiene rubber, styrene-butadiene rubber, and chloroprene rubber, and further containing a flame retardant or a flame retardant aid such as antimony trioxide, aluminum hydroxide, and chlorinated paraffin.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-200990
Disclosure of Invention
Problems to be solved by the invention
In recent years, from the viewpoint of improvement in plant operation rate and the like, further improvement in performance has been demanded for conveyor belts, and for example, conveyor belts excellent in heat aging resistance (which are less likely to deteriorate in tensile properties even when exposed to a high-temperature environment) and flame retardancy have been demanded.
The present inventors have evaluated a rubber composition containing butadiene rubber and styrene-butadiene rubber as rubber components and containing antimony trioxide and chlorinated paraffin as a flame retardant or a flame-retardant aid, with reference to patent document 1, and have found that although flame retardancy is good, heat aging resistance may be insufficient.
Accordingly, the present invention has an object to provide a rubber composition capable of forming a conveyor belt excellent in flame retardancy and heat aging resistance. Further, the present invention has an object to provide a conveyor belt excellent in flame retardancy and heat aging resistance.
Means for solving the problems
The present inventors have conducted intensive studies on the above-mentioned problems, and as a result, have found that a conveyor belt excellent in flame retardancy and heat aging resistance can be obtained by using a rubber composition in which a predetermined amount of antimony trioxide and a bromine-based flame retardant is added to a rubber component containing butadiene rubber and styrene-butadiene rubber, and have completed the present invention.
That is, the present inventors have found that the above problems can be solved by the following configuration.
[1]
A rubber composition for a conveyor belt, comprising:
a rubber component containing butadiene rubber and styrene-butadiene rubber;
antimony trioxide; and
a brominated flame retardant which is a mixture of a brominated flame retardant,
the content of antimony trioxide is 1 to 10 parts by mass per 100 parts by mass of the rubber component,
the content of the bromine-based flame retardant is 5 to 40 parts by mass with respect to 100 parts by mass of the rubber component.
[2]
The rubber composition for a conveyor belt according to item [1], wherein the brominated flame retardant comprises a brominated flame retardant having a melting point of 300 ℃ or higher.
[3]
The rubber composition for a conveyor belt according to [1] or [2], wherein the bromine-based flame retardant is a compound represented by the following formula (1).
In the formula (1) described later, R represents an aliphatic hydrocarbon group which may contain an unsaturated bond.
[4]
The rubber composition for a conveyor belt according to any one of [1] to [3], wherein the rubber component is composed of only the butadiene rubber and the styrene-butadiene rubber,
the content of the butadiene rubber is 25% by mass or less based on the total mass of the rubber component,
the content of the styrene-butadiene rubber is 75% by mass or more based on the total mass of the rubber components.
[5]
The rubber composition for a conveyor belt according to any one of [1] to [4], further comprising a vulcanizing agent.
[6]
The rubber composition for conveyor belts according to [5], wherein the vulcanizing agent is an organic sulfur compound.
[7]
The rubber composition for a conveyor belt according to [5] or [6], wherein the total sulfur content is 0.13 to 0.54 parts by mass per 100 parts by mass of the rubber component.
[8]
The rubber composition for a conveyor belt according to any one of [1] to [8], further comprising silica.
[9]
A conveyor belt produced using the rubber composition for conveyor belts according to any one of [1] to [8 ].
[10]
The conveyor belt according to [9], which comprises a covering rubber formed using the rubber composition for conveyor belts.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, a rubber composition capable of forming a conveyor belt excellent in flame retardancy and heat aging resistance can be provided. Further, according to the present invention, a conveyor belt excellent in flame retardancy and heat aging resistance can also be provided.
Drawings
Fig. 1 is a cross-sectional view of an embodiment of a conveyor belt of the present invention.
Fig. 2 is a cross-sectional view of another embodiment of the conveyor belt of the present invention.
Detailed Description
The present invention will be described in detail below.
In the present specification, a numerical range expressed by "to" used in the present specification means a range including numerical values described before and after "to" as a lower limit value and an upper limit value.
In the present specification, unless otherwise specified, each component may be used alone or in combination of 2 or more kinds of the substances corresponding to the component. When the component contains 2 or more substances, the content of the component means the total content of the 2 or more substances.
In the present specification, the method for producing each component is not particularly limited as long as it is not particularly specified. For example, a conventionally known method can be used.
In the present specification, the more excellent at least 1 of the flame retardancy and the heat aging resistance may be referred to as the more excellent effect of the present invention.
[ rubber composition for conveyor Belt ]
The rubber composition for a conveyor belt of the present invention (hereinafter, also simply referred to as "the present composition") contains: a rubber component containing butadiene rubber and styrene-butadiene rubber; antimony trioxide; and a brominated flame retardant. The content of antimony trioxide is 1 to 10 parts by mass per 100 parts by mass of the rubber component. The content of the bromine-based flame retardant is 5 to 40 parts by mass per 100 parts by mass of the rubber component.
The composition can be used to produce a conveyor belt having excellent flame retardancy and heat aging resistance. The details of the reason for this are not clear, but the reason is presumed to be as follows.
That is, it is presumed that the flame retardancy and the heat aging resistance can be balanced at a high level by blending predetermined amounts of antimony trioxide which can function as a flame retardant aid and a bromine-based flame retardant to a rubber component containing butadiene rubber and styrene-butadiene rubber.
Further, the conveyor belt obtained using the present composition is also excellent in wear resistance.
The components contained in the present composition and components that can be contained in the composition will be described below.
[ rubber component ]
The rubber component in the present composition comprises butadiene rubber and styrene-butadiene rubber. In particular, by including styrene-butadiene rubber, the conveyor belt made using the present composition has a tendency to cure after heat aging. Therefore, the effect of excellent wear resistance after thermal aging is exhibited.
The content of the rubber component is preferably 30 to 60% by mass, and particularly preferably 40 to 55% by mass, based on the total mass of the present composition.
< butadiene rubber >
Butadiene rubber (hereinafter, also referred to as "BR") is a homopolymer of butadiene monomer.
From the viewpoint of further improving the effect of the present invention, the weight average molecular weight of the butadiene rubber is preferably 30 to 100 ten thousand, and more preferably 40 to 80 ten thousand.
The weight average molecular weight (Mw) of the butadiene rubber was measured in terms of standard polystyrene by gel/permeation chromatography (GPC) using tetrahydrofuran as a solvent.
From the viewpoint of further improving the effects of the present invention, and/or further improving the initial wear resistance of the conveyor belt, and also improving the wear resistance after heat aging, the upper limit of the content of the butadiene rubber is preferably 40 mass% or less, more preferably 30 mass% or less, and particularly preferably 20 mass% or less, based on the total mass of the rubber component.
From the viewpoint of further improving the effect of the present invention, the lower limit of the content of the butadiene rubber is preferably 5% by mass or more, more preferably 10% by mass or more, and particularly preferably 15% by mass or more, based on the total mass of the rubber component.
< styrene butadiene rubber >
Styrene-butadiene rubber (hereinafter, also referred to as "SBR") can be produced using, for example, a styrene monomer (or a derivative thereof) and a butadiene monomer. The styrene-butadiene rubber may be produced by using other monomers (e.g., isoprene and acrylonitrile) in addition to the styrene monomer and the butadiene monomer.
The method for producing styrene-butadiene rubber (polymerization method) is not particularly limited, and examples thereof include solution polymerization and emulsion polymerization.
For the reason that the effect of the present invention is more excellent, the styrene-butadiene rubber preferably contains 20 to 50% by mass of styrene monomer units, and particularly preferably 35 to 50% by mass of styrene monomer units.
For the reason that the effect of the present invention is more excellent, the content of the butadiene monomer unit in the styrene-butadiene rubber is preferably 20 to 80% by mass, and particularly preferably 50 to 65% by mass.
In view of further improving the effect of the present invention, the weight average molecular weight of the styrene-butadiene rubber is preferably 20 to 100 ten thousand, and more preferably 30 to 80 ten thousand.
The weight average molecular weight (Mw) of styrene-butadiene rubber can be measured by the same method as that for the butadiene rubber.
From the viewpoint of further improving the effect of the present invention, the upper limit of the styrene-butadiene rubber content is preferably 95% by mass or less, more preferably 90% by mass or less, and particularly preferably 85% by mass or less, based on the total mass of the rubber component.
The lower limit of the styrene-butadiene rubber content is preferably 60 mass% or more, more preferably 70 mass% or more, and particularly preferably 80 mass% or more with respect to the total mass of the rubber component, in view of further improving the initial wear resistance and also improving the wear resistance after heat aging.
< other rubber component >
The rubber component may contain a rubber component (other rubber component) other than butadiene rubber and styrene-butadiene rubber within a range not impairing the object of the present invention. Examples of the other rubber component include Natural Rubber (NR), Isoprene Rubber (IR), acrylonitrile-butadiene copolymer rubber (NBR), butyl rubber (IIR), halogenated butyl rubber (Br-IIR, Cl-IIR), Chloroprene Rubber (CR), and the like.
The content of the other rubber component is preferably 0 to 25% by mass, more preferably 0 to 20% by mass, based on the total mass of the rubber components.
The rubber component is preferably composed of only butadiene rubber and styrene-butadiene rubber, from the viewpoint of further improving the effects of the present invention and/or improving the wear resistance of the conveyor belt after heat aging. In this case, the content of butadiene is 25% by mass or less (more preferably 20% by mass or less) with respect to the total mass of the rubber component, and the content of styrene-butadiene rubber is preferably 75% by mass or more (more preferably 80% by mass or more) with respect to the total mass of the rubber component.
[ antimony trioxide ]
Antimony trioxide (Sb) contained in the present composition2O3) There is no particular limitation. Antimony trioxide can act as a flame retardant aid for a brominated flame retardant described later.
The content of antimony trioxide is preferably 2.0 to 9.0 parts by mass, more preferably 3.0 to 7.0 parts by mass, and particularly preferably 5.0 to 7.0 parts by mass, from the viewpoint of further improving the effect of the present invention, with respect to 100 parts by mass of the rubber component.
[ bromine-based flame retardant ]
The brominated flame retardant contained in the composition is a flame retardant containing bromine atoms.
Specific examples of the bromine-based flame retardant include compounds represented by the following formula (1), decabromodiphenyl ether, tetradecobromo-1, 4-diphenoxybenzene, octabromodiphenyl ether, tetrabromodiphenyl ether, tetrabromophthalic anhydride, tetrabromophthalate, 1, 2-bis (2,4, 6-tribromophenoxy) ethane, 2,4, 6-tris (2,4, 6-tribromophenoxy) -1,3, 5-triazine, 2, 4-dibromophenol and its polymer, 2, 6-dibromophenol and its polymer, brominated polystyrene and its polymer, ethylenebistetrabromophthalimide, hexabromocyclododecane, hexabromocyclodecane, hexabromobenzene, and pentabromobenzylacrylate and its polymer. Among them, from the viewpoint of further improving the effect of the present invention, preferred are compounds represented by the following formula (1), decabromodiphenyl ether, and tetradecbromo-1, 4-diphenoxybenzene, and particularly preferred are compounds represented by the following formula (1).
From the viewpoint of further improving the effect of the present invention, the bromine-based flame retardant preferably contains a bromine-based flame retardant having a melting point of 300 ℃ or higher, and particularly preferably has a melting point of 300 ℃ or higher.
The melting point of the brominated flame retardant is particularly preferably 310 ℃ or higher from the viewpoint of further improving the effect of the present invention.
Specific examples of the bromine-based flame retardant having a melting point of 300 ℃ or higher include decabromodiphenyl ether (melting point 305 ℃ C.), tetradecylbromine-1, 4-diphenoxybenzene (melting point 380 ℃ C.), and bis (pentabromophenyl) ethane (melting point 350 ℃ C.) among the compounds represented by the following formula (1).
The melting point of the brominated flame retardant is a temperature at an endothermic peak caused by melting measured by a Differential Scanning Calorimetry (DSC) method.
From the viewpoint of further improving the effect of the present invention, the bromine-based flame retardant is preferably a compound represented by the following formula (1).
In formula (1), R represents an aliphatic hydrocarbon group that may contain an unsaturated bond.
The aliphatic hydrocarbon group may be linear, branched, cyclic, or a combination thereof. An appropriate embodiment is a linear one.
The number of carbon atoms of the aliphatic hydrocarbon group is not particularly limited. Can be, for example, 1 to 10. The number of carbon atoms is preferably 2 to 8.
The aliphatic hydrocarbon group may be saturated or unsaturated. Examples of the unsaturated bond include a vinyl group, an ethenylene group, an ethynylene group, and an ethynylene group.
Examples of the hydrocarbon group include a methylene group, an ethylene group, a 1, 3-propylene group, a 1, 2-propylene group, a butylene group, a pentylene group, a hexylene group, a heptylene group, and an octylene group.
Examples of the compound represented by the formula (1) include bis (pentabromophenyl) ethane.
The compound represented by formula (1) is preferably bis (pentabromophenyl) ethane from the viewpoint of excellent flame retardancy.
The content of the bromine-based flame retardant is preferably 10 to 30 parts by mass, and particularly preferably 15 to 30 parts by mass, from the viewpoint of further improving the effect of the present invention, with respect to 100 parts by mass of the rubber component.
[ vulcanizing agent ]
The present composition preferably contains a vulcanizing agent from the viewpoint of further improving the effect of the present invention.
Specific examples of the vulcanizing agent include sulfur and an organic sulfur compound, and the organic sulfur compound is preferable in terms of further excellent effects of the present invention.
Specific examples of the organic sulfur compound include thiuram compounds such as tetramethylthiuram disulfide (TMTD), tetraethylthiuram disulfide (TETD), tetrabutylthiuram disulfide (TBTD), dipentamethylenethiuram tetrasulfide (DPTT), 4 '-dithiomorpholine and polymeric polysulfides, and 4, 4' -dithiomorpholine is preferable because the effect of the present invention is more excellent.
From the viewpoint of further improving the effect of the present invention, the vulcanizing agent is preferably used in such a manner that the total sulfur content in the present composition is 0.13 to 0.54 parts by mass, more preferably 0.19 to 0.46 parts by mass, and particularly preferably 0.22 to 0.42 parts by mass, per 100 parts by mass of the rubber component.
The total sulfur amount here means the total mass of sulfur atoms in the vulcanizing agent contained in the present composition.
The method of calculating the total sulfur amount will be described by taking, as an example, a case where the vulcanizing agent contained in the present composition is only 4, 4' -dithiomorpholine. 4, 4' -Dithiomorpholine contains 64g of sulfur atoms in 1 mole (molecular weight 236.35 g). Here, when the present composition contains 1 part by mass of 4, 4' -dithiomorpholine per 100 parts by mass of the rubber component, the total sulfur amount per 100 parts by mass of the rubber component is about 0.27 part by mass, which is 1 × 64/236.35.
In the case of using thiuram compounds such as tetramethylthiuram disulfide (TMTD), tetraethylthiuram disulfide (TETD), tetrabutylthiuram disulfide (TBTD), dipentamethylenethiuram tetrasulfide (DPTT), the total sulfur amount is a value of "active sulfur amount" calculated from the following formula (S1) because of the difference in bond cleavage positions when sulfur atoms are released.
An active sulfur amount (sum of sulfur atom amounts of-1 sulfur atom constituting polythioether in 1 molecule of the organic sulfur-containing compound)/(molecular weight of the organic sulfur-containing compound) · (S1)
Specifically, in the case where TMTD is used as the organic sulfur-containing compound, since the sum of the sulfur atom amounts of-1 sulfur atoms constituting the polythioether in 1 molecule is 32 and the molecular weight is 240.43, when the present composition contains 1 part by mass of TMTD with respect to 100 parts by mass of the rubber component, the total sulfur amount with respect to 100 parts by mass of the rubber component is about 0.13 part by mass, 1 × 32/240.43.
[ silica ]
The present composition preferably contains silica. This can suppress sticking of the conveyor belt, and therefore, the operability of the conveyor belt is improved. Further, silica and a bromine-based flame retardant act synergistically, and therefore the effect of the present invention is more exhibited.
The silica is not particularly limited, and any conventionally known silica can be used. Specific examples of the silica include wet silica, dry silica, fumed silica, diatomaceous earth and the like.
In view of further improving the effect of the present invention, the content of silica is preferably 1 to 30 parts by mass, more preferably 5 to 25 parts by mass, and particularly preferably 5 to 20 parts by mass, per 100 parts by mass of the rubber component.
From the viewpoint of further improving the effect of the present invention, the mass ratio of the content of silica to the content of the bromine-based flame retardant (the content of silica/the content of bromine-based flame retardant) is preferably 0.10 to 2.50, more preferably 0.11 to 2.0, still more preferably 0.11 to 1.6, and particularly preferably 0.11 to 1.11.
[ optional ingredients ]
The composition may further contain, in addition to the above components, additives such as carbon black, zinc white (zinc oxide), stearic acid, wax, processing aids, process oils, liquid polymers, vulcanization accelerators, antioxidants, flame retardants other than the above (for example, chlorinated paraffin, chlorinated polyethylene, ammonium polyphosphate, aluminum hydroxide, magnesium hydroxide), softeners, and the like, within a range not to impair the object of the present invention. The content of these additives may be appropriately determined within a range not impairing the object of the present invention.
[ method for preparing rubber composition for conveyor Belt ]
The method for producing the composition is not particularly limited, and specific examples thereof include a method of kneading the above components using a known apparatus (for example, a banbury mixer, a kneader, a roll, etc.). When the present composition contains a vulcanizing agent, it is preferable that components other than the vulcanizing agent are first mixed at a high temperature (preferably 100 to 160 ℃), cooled, and then mixed with the vulcanizing agent.
The composition may be vulcanized or crosslinked under conventionally known vulcanization or crosslinking conditions.
[ conveyor belt ]
Next, a conveyor belt according to the present invention will be described.
The conveyor belt of the present invention is a conveyor belt produced using the present composition. The shape and manufacturing method are the same as those of a known conveyor belt.
There is no particular limitation on which constituent member in the conveyor belt of the present invention the present composition is applied. So long as all or a part of the rubber constituting the conveyor belt of the present invention is formed of the present composition.
The present composition is one of preferable embodiments in that the conveyor belt of the present invention has a covering rubber formed using the present composition, from the viewpoint of excellent flame retardancy and heat aging resistance.
Specific configurations of the conveyor belt of the present invention include, for example, the configurations described below. In addition, the conveyor belt of the present invention is not limited to the attached drawings.
A conveyor belt 1 according to an embodiment of the present invention will be described with reference to fig. 1.
Fig. 1 is a cross-sectional view of an embodiment of a conveyor belt of the present invention. As shown in fig. 1, a conveyor belt 1 according to embodiment 1 of the present invention is a conveyor belt 4 in which a fabric layer 1 is covered with a coating rubber (adhesive rubber) 2 to form a core layer, and the outer periphery thereof is covered with a covering rubber 3. The covering rubber 3 is preferably formed of the present composition.
The conveyor belt 4 shown in fig. 1 has the fabric layer 1 as a core material, and the number of laminated fabric layers 1, the thickness of the covering rubber 3, the belt width, and the like can be appropriately determined depending on the purpose of use.
Examples of the cloth layer include canvas made of a woven fabric of synthetic fibers such as nylon, vinylon, and polyester.
Thickness T of the coating rubber 31、T2In general, the thickness may be about 1.5 to 20 mm.
The coating rubber 2 may be a coating rubber used for a known conveyor belt, and may be a rubber composition containing, for example, Natural Rubber (NR), acrylonitrile butadiene rubber (NBR), Styrene Butadiene Rubber (SBR), Butadiene Rubber (BR), or the like as a rubber component.
Next, embodiment 2 of the conveyor belt of the present invention will be described with reference to fig. 2.
Fig. 2 is a cross-sectional view of another embodiment of the conveyor belt of the present invention.
As shown in fig. 2, the 2 nd embodiment of the conveyor belt according to the present invention is a conveyor belt 8 in which a steel cord 5 is covered with a cushion rubber (adhesive rubber) 6 to form a core layer, and the outer periphery thereof is covered with a covering rubber 7. The covering rubber 7 is preferably formed of the present composition.
The conveyor belt 8 may be configured such that about 50 to 230 steel cords 5 having a diameter of about 2.0 to 9.5mm, each of which is formed by twisting a plurality of strands having a diameter of about 0.2 to 0.4mm, are arranged side by side to form a core material. Generally, the total thickness T of the conveyor belt 8 may be about 10 to 50 mm.
The cushion rubber 6 may be, for example, an adhesive rubber capable of adhering to a galvanized steel cord, which is used for a known steel conveyor belt, and specifically, a rubber composition containing, as a rubber component, Natural Rubber (NR), acrylonitrile butadiene rubber (NBR), Styrene Butadiene Rubber (SBR), Butadiene Rubber (BR), or the like.
The conveyor belt of the present invention can be easily manufactured by, for example, interposing a fabric layer or a steel cord as a core material between unvulcanized rubber sheets molded from the present composition and vulcanizing the unvulcanized rubber sheets by heating and pressing according to a conventional method. The vulcanization is usually carried out at about 120 to 180 ℃ and about 0.1 to 4.9MPa for about 10 to 90 minutes.
The conveyor belt of the present invention is excellent in flame retardancy and heat aging resistance and also excellent in abrasion resistance, because the present composition is used.
Examples
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
[ production of composition ]
Each composition was produced by using the components shown in table 1 below in the composition (parts by mass) shown in the table and mixing them in a banbury mixer.
[ evaluation test ]
[ thermal aging resistance ]
The evaluation of the heat aging resistance was performed based on the elongation at break (EB, unit%) before and after the heat aging treatment using the test sample obtained using the rubber composition.
Specifically, each of the compositions was vulcanized for 45 minutes under a pressure of 3.0MPa in a press molding machine at 160 ℃ to prepare a vulcanized sheet having a thickness of 2 mm. From the sheet, a dumbbell test piece of JIS3 was punched out to obtain a test specimen.
Using the obtained test sample (before heat aging treatment), the temperature was measured at room temperature in accordance with JIS K6251: 2017A tensile test was conducted at a tensile rate of 500 mm/min, and the elongation at break (EB, unit%) was measured. The results are shown in the column "initial EB" in table 1.
The test sample (before heat aging) was left at 125 ℃ for 168 hours and heat aged to obtain a test sample after heat aging. Using the obtained test sample (after heat aging treatment), a tensile test was performed under the same conditions as the test sample before heat aging treatment, and the elongation at break (EB, unit%) was measured. The results are shown in the column "EB after thermal aging" in Table 1.
Based on the values of "initial EB" and "EB after heat aging" obtained in this way, the change rate (%) of elongation at break before and after heat aging treatment was calculated by the following formula. When the change rate was-45% or more, the heat aging resistance was evaluated to be excellent. In addition, the thermal aging resistance is more satisfactory as the value of the rate of change is closer to 0% regardless of whether the value is positive or negative. The results are shown in the column "change rate" in table 1.
The rate of change in elongation at break (%) before and after heat aging treatment was 100 × { (EB after heat aging) - (initial EB) }/(initial EB)
[ flame retardancy ]
Using each composition, according to JIS K6324: 2013 (flame retardant コンベヤベルト -grade test and test method) "7.2.1 item cloth layer conveyor rubber was used to prepare a sample (the sample had a size of 200mm long side and 25mm short side) for the test sample. In each test sample (flame retardant conveyor belt), the composition described above formed a covering rubber and the fabric layer formed a core material.
Based on JIS K6324: 2013 flame resistance コンベヤベルト -grade and the sample for test were evaluated for flame resistance (flame disappearance time in seconds) by the method (flame resistance belt-grade and test method) of the test test. When the flame disappearance time was less than 60 seconds, the flame retardancy was evaluated to be excellent. The results are shown in table 1.
[ abrasion resistance ]
The composition was vulcanized for 30 minutes at a pressing temperature of 150 ℃ under a pressure of 3.0MPa using a press molding machine to prepare a test specimen having a diameter of 16mm and a thickness of 6 mm.
According to JIS K6264-2: 2005, abrasion test of a test sample was carried out at room temperature using a DIN abrasion tester (method A (no sample rotation)), and the amount of abrasion [ mm ] was measured3]. If the abrasion loss is 250mm3The following was evaluated as excellent in abrasion resistance. The results are shown in table 1.
[ Table 1]
The details of each component in table 1 are as follows.
SBR: styrene-butadiene rubber (trade name "Nipol SBR 1502" (manufactured by Nippon ゼオン Co., Ltd.), Mw50 ten thousand
BR: butadiene rubber, trade name "Nipol BR 1220" (manufactured by Japan ゼオン Co., Ltd.), Mw50 ten thousand
ISAF grade carbon black: trade name "ショウブラック N220" (manufactured by キャボットジャパン Co., Ltd.)
Silicon dioxide: trade name "ニップシール AQ" (manufactured by DONG ソー. シリカ)
Zinc oxide: trade name "acidified yellow type 3 mutant" manufactured by Zhenzi chemical industry Co., Ltd
Stearic acid: trade name "ステアリン acid 50S" (manufactured by Qianye fatty acid Co., Ltd.)
An anti-aging agent: trade name "オゾノン 6C" (manufactured by Seiko chemical Co., Ltd.)
Chlorinated paraffin: flame retardant, trade name "エンパラ 70S" (manufactured by Meizizhisu ファインテクノ Co., Ltd.)
Brominated flame retardants: bis (pentabromophenyl) ethane, trade name "SAYTEX 8010" (manufactured by ALBEMARLE CORPORATION), melting point 350 deg.C
Antimony trioxide: trade name "PATOX-M" (manufactured by Japan concentrate Co., Ltd.)
Chlorinated polyethylene: flame retardant, trade name "エラスレン 301" (manufactured by Showa Denko K.K.)
Aromatic oil: softener, trade name "A-OMIX" (manufactured by Sango oil chemical Co., Ltd.)
TS: vulcanization accelerator, trade name "サンセラー TS" (manufactured by Sanxin chemical industries Co., Ltd.)
CZ: vulcanization accelerator, trade name "ノクセラー CZ-G" (manufactured by Dai Xinxing chemical Co., Ltd.)
Sulfur: vulcanizing agent, trade name "Fine Sulfur" (manufactured by Mitsui chemical industries, Ltd.), Sulfur content 100% by mass
4, 4' -dithiomorpholine: vulcanizing agent, trade name "バルノック R" (manufactured by Dainiji chemical industries Co., Ltd.), Sulfur content 27% by mass
In table 1, "total sulfur amount" means the total mass of sulfur atoms in the vulcanizing agent contained in the composition.
As shown in table 1, it was confirmed that if a rubber composition in which 1 to 10 parts by mass of antimony trioxide and 5 to 40 parts by mass of a bromine-based flame retardant were added to 100 parts by mass of a rubber component including butadiene rubber and styrene-butadiene rubber, a conveyor belt having excellent flame retardancy and heat aging resistance could be obtained (examples). In addition, the rubber compositions of the examples exhibited excellent abrasion resistance.
Further, from the comparison of example 1 with example 5 and the comparison of example 9 with example 11, it can be confirmed that if an organic sulfur compound is used as a vulcanizing agent (example 1 and example 11), a conveyor belt more excellent in flame retardancy and heat aging resistance can be obtained.
From the comparison of examples 1 to 13, it was confirmed that if the content ratio of silica to the bromine-based flame retardant is in the range of 0.25 to 1.11 (examples 1 to 5, 7 to 9, and 11 to 13), a conveyor belt having more excellent flame retardancy can be obtained.
On the other hand, as shown in table 1, it was confirmed that when the content of at least one of the antimony oxide and the bromine-based flame retardant is outside the above range with respect to 100 parts by mass of the rubber component including the butadiene rubber and the styrene-butadiene rubber (comparative examples 1 to 4), at least one of the flame retardancy and the heat aging resistance of the conveyor belt is poor.
Description of the symbols
1: cloth layer
2: coated rubber
3. 7: covering rubber
4. 8: conveying belt
5: steel cord
6: and (3) buffer rubber.
Claims (10)
1. A rubber composition for a conveyor belt, comprising:
a rubber component comprising butadiene rubber and styrene-butadiene rubber;
antimony trioxide; and
a brominated flame retardant which is a mixture of a brominated flame retardant,
the content of antimony trioxide is 1 to 10 parts by mass relative to 100 parts by mass of the rubber component,
the content of the bromine-based flame retardant is 5 to 40 parts by mass with respect to 100 parts by mass of the rubber component.
2. The rubber composition for a conveyor belt according to claim 1, wherein the brominated flame retardant comprises a brominated flame retardant having a melting point of 300 ℃ or higher.
3. The rubber composition for a conveyor belt according to claim 1 or 2, wherein the brominated flame retardant is a compound represented by the following formula (1),
in formula (1), R represents an aliphatic hydrocarbon group that may contain an unsaturated bond.
4. The rubber composition for a conveyor belt according to any one of claims 1 to 3, wherein the rubber component is composed of only the butadiene rubber and the styrene-butadiene rubber,
the butadiene rubber is contained in an amount of 25% by mass or less based on the total mass of the rubber component,
the styrene-butadiene rubber is contained in an amount of 75 mass% or more with respect to the total mass of the rubber component.
5. The rubber composition for a conveyor belt according to any one of claims 1 to 4, further comprising a vulcanizing agent.
6. The rubber composition for a conveyor belt according to claim 5, wherein the vulcanizing agent is an organic sulfur compound.
7. The rubber composition for a conveyor belt according to claim 5 or 6, wherein the total sulfur content is 0.13 to 0.54 parts by mass per 100 parts by mass of the rubber component.
8. The rubber composition for a conveyor belt according to any one of claims 1 to 7, further comprising silica.
9. A conveyor belt produced using the rubber composition for conveyor belts according to any one of claims 1 to 8.
10. The conveyor belt according to claim 9, having a covering rubber formed using the rubber composition for conveyor belts.
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Citations (5)
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|---|---|---|---|---|
| CN104017257A (en) * | 2014-06-05 | 2014-09-03 | 张家港市华申工业橡塑制品有限公司 | Composition for flame-retardant conveying belt and flame-retardant conveying belt |
| CN105102526A (en) * | 2013-04-15 | 2015-11-25 | 横滨橡胶株式会社 | Rubber composition for conveyor belt, and conveyor belt |
| JP2017052605A (en) * | 2015-09-09 | 2017-03-16 | 横浜ゴム株式会社 | Conveyor belt rubber composition, and conveyor belt |
| JP2017200990A (en) * | 2016-04-28 | 2017-11-09 | バンドー化学株式会社 | Rubber composition for cover rubber, and conveyer belt |
| CN108659285A (en) * | 2018-05-07 | 2018-10-16 | 江苏凯嘉橡胶科技股份有限公司 | A kind of coal mine low smoke and low halogen conveyer belt coating rubber and its preparation process |
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| JP2009249459A (en) | 2008-04-03 | 2009-10-29 | Yokohama Rubber Co Ltd:The | Rubber composition, rubber composition for conveyor belt, and conveyor belt |
| JP7025858B2 (en) | 2016-08-08 | 2022-02-25 | バンドー化学株式会社 | Rubber composition for cover rubber and conveyor belt |
| JP6583518B1 (en) | 2018-11-28 | 2019-10-02 | 横浜ゴム株式会社 | Rubber composition for conveyor belt and conveyor belt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105102526A (en) * | 2013-04-15 | 2015-11-25 | 横滨橡胶株式会社 | Rubber composition for conveyor belt, and conveyor belt |
| CN104017257A (en) * | 2014-06-05 | 2014-09-03 | 张家港市华申工业橡塑制品有限公司 | Composition for flame-retardant conveying belt and flame-retardant conveying belt |
| JP2017052605A (en) * | 2015-09-09 | 2017-03-16 | 横浜ゴム株式会社 | Conveyor belt rubber composition, and conveyor belt |
| JP2017200990A (en) * | 2016-04-28 | 2017-11-09 | バンドー化学株式会社 | Rubber composition for cover rubber, and conveyer belt |
| CN108659285A (en) * | 2018-05-07 | 2018-10-16 | 江苏凯嘉橡胶科技股份有限公司 | A kind of coal mine low smoke and low halogen conveyer belt coating rubber and its preparation process |
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