摘要:
The present invention is directed to a peroxide curable rubber compound containing a butyl rubber polymer, an olefin polymer of ethylene, at least one alpha-olefin and optionally at least one diene, and a non-polymeric multi-unsaturated peroxide curable compound. The present invention is also directed to a peroxide curable rubber compound containing a butyl polymer, an EPDM rubber polymer and divinylbenzene or di- or tri-(meth)acrylate. Also the present invention is directed to a process for preparing a peroxide curable rubber compound by mixing a butyl rubber polymer, a polymer of ethylene, at least one α-olefin and optionally, at least one diene and non-polymeric multi-unsaturated peroxide curable cure modifier in the presence of a peroxide curing agent.
摘要:
The present invention relates to a shaped article containing at least one peroxide curable compound containing a butyl-like polymer(s) without any conjugated aliphatic diene in its composition, said polymer containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min. The present invention also relates to a sealing material and a medical device containing at least one peroxide-curable compound containing a butyl-like polymer containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min. Further, the present invention relates to a process for producing a butyl-like polymer having no conjugated aliphatic diene in its composition and containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min. In addition, the present invention relates to a process the manufacturing of the inventive compound wherein the elastomeric polymer is mixed with at least one filler and at least one peroxide curing system in a mixing means.
摘要:
The present invention is directed to a peroxide curable rubber compound containing a butyl rubber polymer and an olefin polymer of ethylene and at least one α-olefin. The present invention is also directed to a peroxide curable rubber compound containing a butyl polymer and an EP(D)M rubber polymer.
摘要:
The present invention relates to an elastomeric polymer having repeating units derived from at least one isomonoolefin monomer, at least one multiolefin monomer, at least one diisoalkenylbenzene monomer, and optionally further copolymerizable monomers, wherein the polymer has a Mooney viscosity (ML 1+8@125° C. according to ASTM D1646) of less than 40 units and a Shore A hardness higher than 65 points @ 23° C. (according to ASTM D2240) as well as a curable composition containing the elastomeric polymer and a shaped article manufactured from the curable composition.
摘要:
The present invention relates to a method of improving reversion resistance of a peroxide curable polymer containing at least one polymer having repeating units derived from at least one isomonoolefin monomer and at least one aromatic divinyl monomer by polymerizing the monomers in the presence of at least one m- or p-diisoalkenylbenzene compound.
摘要:
The present invention is directed to a peroxide curable rubber compound containing a butyl rubber polymer, an olefin polymer of ethylene, at least one α-olefin and optionally at least one diene, and a high vinyl polybutadiene polymer. The present invention is also directed to a peroxide curable rubber compound containing a butyl polymer, an EP(D)M rubber polymer, and a 1,2-polybutadiene polymer.
摘要:
The present invention relates to an elastomeric polymer having repeating units derived from at least one isomonoolefin monomer, at least one multiolefin monomer, at least one diisoalkenylbenzene monomer, and optionally further copolymerizable monomers, wherein the polymer has a Mooney viscosity (ML 1+8@125° C. according to ASTM D1646) of less than 40 units and a Shore A hardness higher than 65 points @ 23° C. (according to ASTM D2240) as well as a curable composition containing the elastomeric polymer and a shaped article manufactured from the curable composition.
摘要:
The present invention is directed to a peroxide curable rubber compound containing a butyl rubber polymer and an olefin polymer of ethylene and at least one α-olefin. The present invention is also directed to a peroxide curable rubber compound containing a butyl polymer and an EP(D)M rubber polymer.
摘要:
A process for producing high cis-1,4-polybutadienes wherein there is reduced gel formation is provided which process comprises: polymerizing 1,3-butadiene in a polymerization medium comprising an inert hydrocarbon solvent and water at a temperature of from about -30.degree. C. to about 60.degree. C. in the presence of a catalyst system which is a mixture of (1) a substantially anhydrous divalent cobalt salt, (2) diethyl aluminum chloride or ethyl aluminum sesquichloride and (3) an organo aluminum compound of the formula R.sub.3 Al wherein R is an alkyl group having from 8 to 12 carbon atoms and, optionally triethylaluminum, the molar ratio of chloride in the diethyl aluminum chloride plus (3) being from about 0.7:1 to about 1 and the molar ratio of chloride in the ethyl aluminum sesquichloride plus (3) being from about 0.7:1 to about 1.4:1 and the ratio of the mols of the divalent cobalt salt to the total mols of diethyl aluminum chloride or ethyl aluminum sesquichloride plus (3) being from about 1:15 to about 1:30, the water being employed at a level of from about 0.1 to about 0.8 millimol for every millimol of diethyl aluminum chloride or ethyl aluminum sesquichloride used, to the desired conversion.
摘要:
A polymerization process for preparing a silica-filled butyl rubber polymer. A quaternary onium ion substituted silaceous nanoclay is dispersed in the organic polymerization fluid prior to polymerization of an isoolefin monomer and a multiolefin monomer in the fluid. The resulting silica-filled polymer comprises butyl rubber intercalated with silica from the silaceous nanoclay. The rate of polymerization is substantially unaffected by addition of the nanoclay to the polymerization fluid. The resulting silica-filled polymers exhibit improved impermeability as compared with non-filled polymers.