Ageing-resistant rubber composition and processing method therefor and use thereof

{
  "publication_number": "US11993703B2",
  "country": "US",
  "kind": "B2",
  "title": "Ageing-resistant rubber composition and processing method therefor and use thereof",
  "abstract": "Disclosed are an aging-resistant rubber composition and methods for processing and use thereof. The rubber composition includes a rubber matrix and compounding components. In parts by weight, every 100 parts of rubber matrix comprise 50-99 parts of a halogenated butyl rubber, 0-50 parts of a highly branched polyethylene P1, and 0-50 parts of P2 obtained by the polarization modification of said highly branched polyethylene P1. The sum of P1 and P2 in parts by weight is 1-50 parts; and the compounding components comprise a vulcanization system.",
  "claims": [
    "1. A rubber composition, comprising a rubber matrix and compounding components, wherein, in parts by weight, every 100 parts of said rubber matrix comprise 50-99 parts of a halogenated butyl rubber, 0-50 parts of a highly branched polyethylene P1, and 0-50 parts of P2 obtained by the polarization modification of said highly branched polyethylene P1, and the sum of P1 and P2 in parts by weight is 1-50 parts; and said compounding components comprise a vulcanization system.",
    "2. The rubber composition according to claim 1, wherein, the branching degree of said P1 is 60-130 branches/1000 carbon atoms.",
    "3. The rubber composition according to claim 2, wherein the branching degree of the P1 is 72-112 branches/1000 carbon atoms.",
    "4. The rubber composition according to claim 1, wherein, the polar monomer used for preparing said P2 comprises at least one of maleic anhydride (MAH), methacrylic acid (MA), acrylic acid (AA), itaconic acid (IA), fumaric acid (FA), isocyanate, glycidyl methacrylate (GMA), methyl methacrylate (MMA), dibutyl fumarate (DBF), β-hydroxyethyl methacrylate (HEMA), dibutyl maleate (DBM), diethyl maleate (DEM), elemental halogen, a halogen-containing compound, a sulfur-containing compound, vinyltrimethoxysilane (VTMS), vinyltriethoxysilane (VTES), 3-methacryloxypropyltrimethoxysilane (VMMS), styrene (St), α-methylstyrene (α-MSt), and acrylonitrile (AN).",
    "5. The rubber composition according to claim 4, wherein, said P2 is a halogen-containing branched polyethylene with a polar group which comprises at least one of a chlorine group, a bromine group, a chlorosulfonyl group, and a bromosulfonyl group.",
    "6. The rubber composition according to claim 5, wherein, the mass percentage of halogen in said halogen-containing branched polyethylene is 0.2-50%, and said halogen-containing branched polyethylene comprises at least one of chlorinated branched polyethylene, brominated branched polyethylene, and chlorosulfonated branched polyethylene.",
    "7. The rubber composition according to claim 6, wherein, the mass percentage of chlorine in said chlorinated branched polyethylene or said chlorosulfonated branched polyethylene is 0.5-45.5%, and the mass percentage of bromine in said brominated branched polyethylene is 0.8-4%.",
    "8. The rubber composition according to claim 1, wherein, based on 100 parts by weight of said rubber matrix, said rubber composition further comprises up to 30 parts of an ethylene propylene diene monomer rubber.",
    "9. The rubber composition according to claim 1, wherein, said vulcanization system is selected from at least one of a peroxide vulcanization system, a sulfur vulcanization system, a thiourea vulcanization system, a metal oxide vulcanization system, and a radiation vulcanization sensitization system.",
    "10. The rubber composition according to claim 9, wherein, said vulcanization system is a peroxide vulcanization system, and based on 100 weight parts of said rubber matrix, the usage amount of peroxides is 1-10 weight parts, and a peroxide crosslinking agent is at least one of di-tert-butyl peroxide, dicumyl peroxide, tert-butyl cumyl peroxide, 1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, 2,5-dimethyl-2,5-di(tert-butylperoxy)-3-hexyne, bis(tert-butylperoxyisopropyl)benzene, 2,5-dimethyl-2,5-bis(benzoylperoxy)hexane, tert-butyl peroxybenzoate, and tert-butylperoxy-2-ethylhexyl carbonate.",
    "11. The rubber composition according to claim 10, wherein, said peroxide vulcanization system further comprises 0.2-20 parts by weight of an auxiliary crosslinking agent, and said auxiliary crosslinking agent comprises at least one of triallyl cyanurate, triallyl isocyanurate, ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, triallyl trimellitate, trimethylolpropane trimethacrylate, N,N′-m-phenylene bismaleimide, N,N′-bis(furfurylidene) acetone, 1,2-polybutadiene, an unsaturated carboxylic acid metal salt, and sulfur.",
    "12. The rubber composition according to claim 1, wherein, based on 100 parts by weight of said rubber matrix, said compounding components further comprise 10-200 parts of a reinforcing filler, 0-80 parts of a plasticizer, 3-30 parts of a metal oxide, 0-3 parts of stearic acid, 0-15 parts of a surface modifier, 0-6 parts of a stabilizer, 0-15 parts of a tackifier, 0-20 parts of an adhesive, 0-150 parts of a flame-retardant agent, 0-20 parts of a foaming agent, and 0-40 parts of an air-blocking agent.",
    "13. A conveyor belt, comprising a covering rubber layer for working surface, a covering rubber layer for non-working surface, and a tensile layer provided between said covering rubber layer for working surface and said covering rubber layer for non-working surface, wherein, the rubber used for at least one of said covering rubber layer for working surface and said covering rubber layer for non-working surface comprises said rubber composition according to claim 1.",
    "14. A tire, comprising an inner liner, wherein, the rubber used in said inner liner comprises said rubber composition according to claim 1."
  ],
  "description_excerpt": "The present invention relates to the technical field of rubber, and particularly relates to a heat aging-resistant rubber composition and a processing method therefor and use thereof.\n\nButyl rubber is obtained by copolymerizing isobutylene with a small amount of isoprene, which has a series of excellent properties, such as good air tightness, good weather resistance, good shock absorption, and chemical corrosion resistance. Halogenated butyl rubber is obtained by the modification of the butyl rubber via halogenation. Because of having more vulcanization ways and a better comprehensive performance than the butyl rubber, the halogenated butyl rubber is the mainstream product of butyl rubber in the current market, which is widely used in various applications, such as tire inner-liners, rubber hoses, conveyor belts, medical products, and shock absorption products, but it also has certain limitations. Due to the presence of a small amount of double bond structures in the molecular structure of the halogenated butyl rubber, its heat aging resistance is usually inferior to that of the rubbers with a fully saturated backbone, such as ethylene propylene rubber or ethylene propylene diene monomer rubber, which limits its applications to some extent. In the prior art, the butyl rubbers are usually used in combination with ethylene propylene rubbers to improve its heat aging resistance. However, because the copolymerizing materials contain a third monomer with a bifunctional group, the resultant ethylene propylene diene monomer rubber has a weaker heat aging resistance than that of the ethylene propylene rubber.",
  "cpc": [
    "C08L 23/286",
    "B29D 2030/0682",
    "B29D 29/06",
    "B29D 30/0681",
    "B60C 1/0008",
    "B65G 15/32",
    "C08K 2003/2217",
    "C08K 2003/222",
    "C08K 2003/2296",
    "C08K 3/06",
    "C08K 3/22",
    "C08K 5/0025",
    "C08K 5/14",
    "C08K 5/405",
    "C08L 15/02",
    "C08L 2201/02",
    "C08L 2201/08",
    "C08L 2205/025",
    "C08L 2205/035",
    "C08L 2207/07",
    "C08L 23/06",
    "C08L 23/16",
    "C08L 23/22",
    "C08L 23/283",
    "C08L 23/32",
    "C08L 23/34",
    "C08L 23/36"
  ],
  "ipc": [
    "B60C 1/00",
    "B65G 15/32",
    "C08K 3/06",
    "C08K 3/22",
    "C08K 5/00",
    "C08K 5/14",
    "C08K 5/405",
    "C08L 23/06",
    "C08L 23/16",
    "C08L 23/22",
    "C08L 23/28",
    "C08L 23/34"
  ],
  "assignees": [
    "Zhejiang University ZJU",
    "Hangzhou Xinglu Technology Co Ltd"
  ],
  "inventors": [
    "Tao Xu",
    "Zhi Sheng FU",
    "An Yang WU"
  ],
  "filing_date": "2019-06-25",
  "publication_date": "2024-05-28",
  "grant_date": "2024-05-28",
  "priority_date": "2018-07-13",
  "application_number": "US-201917259926-A",
  "family_id": "69143219",
  "cited_by_count": 0,
  "citations": [
    "DE214623C",
    "CN1114934A",
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    "US8076416B2",
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    "CN106220934A"
  ]
}