64 results about "Antiozonant" patented technology

Compositions are disclosed which comprise mixtures of at least one compound selected from silicone elastomers, bis-, tri- or higher polymaleimides and/or bis-, tri- or higher polycitraconimides, and at least one compound selected from p-phenylene-diamine based antiozonants, sulfur compounds capable of accelerating sulfur vulcanization of polymers capable of being crosslinked by sulfur and polysulfide polymers which when compounded into polymers curable by free radical initiators in the presence of free radical initiators permit substantially tack free surface cure of the polymers by decomposition of the free radical initiator in the presence of molecular oxygen. Compositions containing the above ingredients and at least one free radical initiator, curable compositions containing the combination and processes for making and using the compositions are also disclosed.

There is provided a predominantly open-cell polyurethane foam obtained from a predominantly open-cell polyurethane foam-forming reaction medium which comprises:

• • a) at least one polyol;
  • b) at least one polyisocyanate;
  • c) at least one catalyst;
  • d) water;
  • e) a predominantly open-cell polyurethane foam-forming amount of at least one surfactant which is a balanced, substantially linear polyether-polysiloxane ABA′ block copolymer; and,
  • f) optionally, at least one additional component selected from the group consisting of other polymer and/or copolymer, chain extender, crosslinker, non-aqueous blowing agent, filler, reinforcement, pigment, tint, dye, colorant, flame retardant, antioxidant, antiozonant, UV stabilizer, anti-static agent, biocide and biostat.

The invention relates to the field of rubber, particularly an environment-friendly corrosion-resistant epichlorohydrin rubber which is composed of the following components in parts by weight: 50-80 parts of epichlorohydrin rubber, 10-15 parts of silicon dioxide, 20-30 parts of quick-extrusion carbon black, 1-5 parts of anti-aging agent, 0-5 parts of antiozonant, 0.5-1.5 parts of vulcanizing agent, 0.5-1.5 parts of stearic acid, 2-5 parts of magnesium oxide and 1-3 parts of calcium carbonate. By using microcrystalline wax, which has the advantages of high melting point, low migration rate and small and uniform crystals, as the anti-aging agent, the film formed by the wax, which has the advantages of high binding firmness with rubber, favorable flexibility and favorable shielding property, can have an anti-aging action, and can also generate an isolating layer on the rubber surface to perform the demolding function and reduce the contact between the epichlorohydrin rubber and the metal mold, thereby decelerating the metal corrosion and resisting metal corrosion without adding any other component; and the lead-free vulcanizing agent PDM conforms to the requirement for environment friendliness.

A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; and, (c) at least one thiuram disulfide accelerator, it being provided that diphenyl guanidine is substantially absent in the rubber composition. The compositions may also include suitable amounts of other ingredients such as carbon black, coupling agents, antiozonants, antioxidants, etc.

Radical initiated reactions of phenylenediamines with alkylated aromatic amines produce an antioxidant mixture containing cross reaction products of the phenylenediamines and alkylated aromatic amines which are useful, for example, as antioxidants, stabilizers, and antiozonants for lubricants, electronic chemicals, rubbers, urethanes and other polymer resins, crop protection, pharmaceuticals, dyes and toners

Compositions comprising substituted phenylenediamine and substituted triazine compounds, including tris-(N-alkyl-p-phenylenediamino)-1,3,5-triazines. The compositions are liquid and do not sinter during storage or transportation. The compositions are used as antiozonants for elastomer articles, including rubber articles.

The invention relates to the field of rubber, and particularly relates to nitrile butadiene rubber which consists of the following components in parts by weight: 50-80 parts of nitrile butadiene rubber, 0.5-1.0 part of stearic acid, 2-3 parts of zinc oxide, 3-8 parts of diethyl phthalate, 1-3 parts of polyethylene wax, 0.5-1.5 parts of accelerant, 3-5 parts of alkyl ether adipate, 2-5 parts of calcium silicate, 1-3 parts of antiozonant, 0-3 parts of anti-aging agent and 20-30 parts of carbon black. The nitrile butadiene rubber provided by the invention has the beneficial effects that the anti-ozone property of nitrile butadiene rubber is effectively improved due to addition of polyethylene wax and antiozonant and the heat resistance and hardness of nitrile butadiene rubber are effectively improved due to addition of the filler agents including diethyl phthalate and calcium silicate,.

Liquid antiozonant mixtures obtained from the process comprising simultaneously reacting at least one unsubstituted and/or substituted paraphenylenediamine compound with a carbonyl compound mixture comprising acetone and at least one other carbonyl compound selected from the group consisting of ketones containing from 4 to about 12 carbon atoms, aldehydes containing from 1 to about 12 carbon atoms and mixtures thereof in the presence of a reductive alkylation catalyst is provided. Rubber compositions containing the liquid antiozonant mixtures is also provided.

An antiozonant mixture is disclosed wherein said mixture comprises at least two compounds,

(A) at least one of which is of the structure

and

(B) at least one other of which is of the structure

wherein

• • R₁ is a straight chain, branched, or cyclic alkyl group comprising from three to seven carbon atoms, and
  • R₂ is a straight chain, branched, or cyclic alkyl group comprising at least eleven carbon atoms.

The invention relates to an antibacterial environment-friendly rubber. The rubber comprises the following raw materials in parts by weight: 40-55 parts of silicone rubber, 4-7 parts of an antiozonant, 4-7 parts of a nano-silver antibacterial agent, 6-12 parts of vinyl silicone resin, 9-14 parts of boric acid, 2-5 parts of hydroxyl silicone oil, 1-4 parts of a nanometer heat-resistant additive, 2-4 parts of carbon fiber and 1-3 parts of sodium stearate. The rubber disclosed by the invention has the beneficial effects that the rubber material disclosed by the invention has the advantages of excellent antibacterial effect and no harm to the environment and human body.

A process for crosslinking an elastomer composition in the presence of an organic peroxide formulation is disclosed. The organic peroxide formulation may comprise additional compounds chosen from bis-, tri- and higher poly-maleimides, bis-, tri- and higher poly-citraconimides, peroxide-crosslinkable silicone elastomers, p-phenylenediamine based antiozonants, sulfur containing organic compounds which are accelerators for the sulfur curing (crosslinking) of polymers which are curable/crosslinkable by sulfur, and polysulfide polymers. Methods of manufacturing elastomer articles, methods of reducing mold-fouling, elastomer compositions, and elastomer articles made from the elastomer compositions are also disclosed.

The invention belongs to the field of rubber materials, and particularly relates to a flame-retardant composite rubber material capable of resisting high-concentration ozone and a preparation method thereof. The composite rubber material comprises the following raw materials in parts by weight: 70-30 parts of ethylene propylene diene monomer, 30-70 parts of chlorosulfonated polyethylene, 30-60 parts of a reinforcing agent, 25-50 parts of a flame-retardant material, 5-15 parts of paraffin oil, 5-12 parts of an anti-ozone agent, 4-6 parts of zinc oxide and 0.3-1 part of stearic acid. In the preparation process of the flame-retardant composite rubber, the ethylene propylene diene monomer, the chlorosulfonated polyethylene and the magnesium oxide are mixed, then the active agent, the aniseed and the oil material are added step by step, low-temperature mixing is performed, high-temperature conditions are not needed, and the production process is simple, energy-saving and efficient. Throughreasonable formula design and process optimization, the prepared composite rubber material has the characteristics of high-concentration ozone resistance and favorable flame retardancy, and can resistthe ozone concentration of 200ppm on an ozone generator so as to keep intact.

The invention discloses an outer coating layer for a plastic pencil and a preparation method thereof, and relates to the technical field of pencil preparation. The outer coating layer is prepared fromthe following components in parts by weight: 60-80 parts of polyethylene, 10-15 parts of SBS, 2-5 parts of coupler, 20-60 parts of modified modified bentonite, 1-3 parts of an antiaging agent, 1-3 parts of antioxidant, 2-5 parts of color masterbatch, 2-5 parts of an odor removing agent, 2-5 parts of a crosslinking agent, 2-10 parts of mineral oil, 5-15 parts of titanium dioxide, 3-7 parts of zincoxide and 5-15 parts of fatty acid. According to the outer coating layer, the polyethylene and modified bentonite are used as main materials, and are added with additives to prepare a coating film, which coats the outer part of a pen-holder, and the problem that an existing plastic pencil coating layer is over hard or easily broken can be solved.

The invention discloses a long-life sealing ring for large-sized hydraulic equipment. The long-life sealing ring is prepared from the following raw materials in parts by weight: 80-120 parts of nitrile rubber, 100-120 parts of high-wear resistance furnace black, 3-5 parts of a multiwalled carbon nanotube, 0.5-1 parts of insoluble sulfur, 1-3 parts of tetrabenzylthiuramdisulfide, 1-3 parts of N-cyclohexane-2-benzothiazolyl sulfonamide, 5-8 parts of indirect process zinc oxide, 1-2 parts of stearic acid 1-2, 1.5-3 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 1.5-3 parts of a thiourea antiozonant, 5-15 parts of trioctyl trimellitate, 1-2 parts of saturated isoparaffin and 1.5-3 parts of saturated fatty acid ester. The long-life sealing ring has the characteristics of hydraulic oil resistance, high temperature resistance, low temperature resistance, high pressure resistance, wear resistance, ozone resistance and the like; compared with a common sealing ring, the long-life sealingring has the advantages of reliability in the sealing, wide high and low temperature ranges, strong applicability, long life, environmental friendliness and the like.