12 results about "Thiuram disulfide" patented technology

The invention relates to the technical field of sealing elements, in particular to rubber, a preparation method of the rubber, a fully-coated rubber O-shaped ring and a preparation method and application of the fully-coated rubber O-shaped ring. The rubber provided by the invention is prepared from the following raw materials in parts by mass: 100 parts of ethylene propylene diene monomer, 30-50 parts of a reinforcing agent, 5-10 parts of a plasticizer, 1-2 parts of an antioxidant, 1-2 parts of a stabilizer, 0.8-1.2 parts of a vulcanizing agent, 0.5-1 part of an accelerant, 3-5 parts of zinc oxide, 1-1.5 parts of stearic acid, 3-6 parts of a special modification additive, 2-5 parts of a preservative and 3-5 parts of a phosphate flame retardant, the content of vinyl in the ethylene propylene diene monomer is 55 wt%-65 wt%; the vulcanizing agent comprises a bis (dithiourea) vulcanizing agent and / or zinc diethyl dithiocarbamate; the accelerant comprises tetramethyl thiuram disulfide and / or N-cyclohexyl-2-benzothiazole sulfonamide, and the accelerant comprises tetramethyl thiuram disulfide and / or N-cyclohexyl-2-benzothiazole sulfonamide. The rubber has excellent corrosion resistance against special liquid oxidants (e.g., HAP).

The phenylenediamine-based antioxidant is used as a substitute for 6PPD, while improving scorch resistance and heat aging resistance. [Solution] The rubber composition according to the embodiment comprises a rubber component, a phenylenediamine-based antioxidant represented by the following formula (1), and a thiuram disulfide-based vulcanization accelerator. In formula (1), R 1 and R 2 Each of these independently represents a hydrocarbon group having 6 or more carbon atoms, however, R 1 and R 2 Except when it is a combination of a phenyl group and a 1,3-dimethylbutyl group. [Formula 1] JPEG2026103949000010.jpg42129

The invention relates to the technical field of polymer foam materials, in particular to a rubber-based composite foam material for a middle layer of a shoe sole and a preparation method of the rubber-based composite foam material for the middle layer of the shoe sole. Adding a foaming agent, sulfur, an accelerant N-cyclohexyl-2-benzothiazole sulfenamide and tetrabenzylthiuram disulfide, and carrying out secondary internal mixing to obtain a uniformly mixed styrene butadiene rubber / natural rubber-based rubber compound; putting the rubber compound into an open mill, and discharging bubbles; and finally, carrying out high-temperature curing foaming on the rolled rubber compound by using a plate vulcanizer. The rubber-based composite foam material obtained by the invention has the characteristics of simple process, light weight, uniform foam holes, high elasticity and high tensile strength, and is suitable for middle-layer materials of soles.

A process for preparing a clustered epoxy silicone with the following steps: (a) conduct a hydrosilylation reaction between the following reactants in the presence of a platinum-based hydrosilylation catalyst to form a SiH-functional siloxane intermediate: (i) an alkenyl functional siloxane with 2 or more silicon-bound alkenyl groups per molecule; and (ii) a cyclic SiH-functional siloxane with 4 or more SiH groups per molecule; (b) add thiuram disulfide at a concentration at least twice that of platinum from step (a); (c) strip unreacted SiH-functional siloxane at a temperature at or below 120 °C to obtain a stripped reaction product of SiH-functional siloxane intermediate and inhibited platinum; (d) optionally, combining the stripped reaction product with a non-platinum hydrosilylation catalyst and an alkenyl-functional epoxide; and (e) heat to 80-120 °C to facilitate a hydrosilylation reaction between the SiH-functional siloxane intermediate and the alkenyl-functional epoxide to produce a clustered epoxy silicone.

Disclosed is a method comprising combining the following components to form a platinum (II) dithiocarbamate complex in a solvent: (i) a platinum (0) complex; (ii) tetrahydrocarbyl thiuram disulfide; and (iii) a solvent. The method may also include separating the platinum (II) dithiocarbamate complex from a solvent to separate the platinum (II) dithiocarbamate complex. The method can also include preparing a curable silicone composition by combining the platinum (II) dithiocarbamate complex with a vinyl functional silicone and a silyl hydride functional silicone to form a curable composition.

The invention relates to the field of advanced packaging semiconductor driving chips, and discloses a gold etching solution, application thereof and a method for electroplating gold-silver alloy on an etched wafer. The gold etching liquid comprises a complexing agent, an oxidizing agent, an aluminum protective agent and a solvent; wherein the complexing agent comprises a main complexing agent and an auxiliary complexing agent; the main complexing agent is selected from thiourea and / or thiourea derivatives; the auxiliary complexing agent is selected from at least one of butyl xanthate, isoamyl xanthate, thionocarbamate and diethyl phosphonate; the weight ratio of the complexing agent to the oxidizing agent to the aluminum protective agent to the solvent is 1: (0.2-1.5): (0.2-1.5): (20-30). The gold etching liquid has mild oxidability, can selectively etch a PVD gold seed layer, avoids etching a gold-silver alloy bump, does not cause serious deformation of the gold-silver alloy bump, avoids damage of etching to an aluminum circuit in a wafer, and is mild in etching condition and adjustable in gold etching rate.

An ultraviolet light-triggered hydrosilylation-curable composition contains: (a) a resin-linear polysiloxane containing on average at least 2 alkenyl groups per molecule and an average of less than 1.0 mole-percent SiOZ per moles of Si atoms; (b) a crosslinker containing an average of at least two SiH groups per molecule; (c) an ultraviolet light triggerable platinum catalyst; (d) greater than zero mass parts of platinum that is not part of the ultraviolet light triggerable platinum catalyst per million mass parts resin-linear polysiloxane; and (e) thiuram disulfide; where the concentration of crosslinker is sufficient to achieve a molar ratio of SiH to alkenyl groups from the resin-linear polysiloxane that is in a range of 0.25 to 2.0.

A process for preparing a liquid silicone composition comprising a linear organopolysiloxane includes the steps of: (a) combining (A) a polyorganohydrogensiloxane having an average of one or more SiH groups per molecule, (B) a specific alkenyl-functional compound having an average of one or more alkenyl groups, and (C) a platinum (0) complex catalyst together to form a reaction mixture; provided that, if (A) contains more than one SiH group, (B) contains one alkenyl group; (b) reacting the reaction mixture obtained from step (a) under conditions such that at least part of (A) and at least part of (B) react to form the linear organopolysiloxane; and (c) upon conversion of greater than 95%of the SiH groups of (A), combining the reaction mixture obtained from step (b) with a thiuram disulfide compound at a specific molar equivalent ratio to obtain the liquid silicone composition.

The present invention discloses a dicaprolactam thiuram disulfide, a preparation method, and an application thereof. Caprolactam and carbon disulfide are reacted in a solvent to generate caprolactam dithiocarbamic acid, and a hydrogen peroxide solution is subsequently added dropwise to obtain dicaprolactam thiuram disulfide. The present invention has a simple production process, is easy to operate, has low cost, and is environmentally friendly. The obtained dicaprolactam thiuram disulfide has high purity, a high melting point, a white appearance, and exhibits good rapid vulcanization performance. It also does not suffer from the toxicity issues of common thiuram accelerators. Therefore, it is an environmentally friendly rubber vulcanization accelerator that supplements the variety of rubber vulcanization accelerators in the domestic market.

The application relates to the field of advanced packaging semiconductor driving chips, and discloses a gold etching solution, application of the gold etching solution and a method for etching a wafer electroplated gold-silver alloy. The gold etching solution comprises a complexing agent, an oxidizing agent, an aluminum protective agent and a solvent; wherein the complexing agent comprises a main complexing agent and an auxiliary complexing agent; the main complexing agent is selected from thiourea and / or a thiourea derivative; the auxiliary complexing agent is selected from at least one of butyl xanthate, isoamyl xanthate, thiuram disulfide and diethyl phosphonate; and the weight ratio of the complexing agent: the oxidizing agent: the aluminum protective agent: the solvent is 1:(0.2-1.5):(0.2-1.5):(20-30). The gold etching solution has mild oxidizing property, can selectively etch a PVD gold seed layer, avoids etching the gold-silver alloy bump itself, does not cause the gold-silver alloy bump to appear serious deformation, avoids damage to aluminum lines in the wafer caused by etching, and has mild etching conditions and adjustable gold etching rate.

The invention discloses a low-temperature vulcanization accelerator for a rubber product and a preparation method of the low-temperature vulcanization accelerator. The low-temperature vulcanization accelerator comprises ethylene-propylene-diene monomer, EVA (Ethylene-Vinyl Acetate), a processing technology aid, 2-mercaptobenzothiazole zinc salt, a sulfenamide accelerator, a tetrabenzylthiuram disulfide accelerator and an accelerator BG. Through the mode, according to the low-temperature vulcanization accelerator for the rubber product and the preparation method of the low-temperature vulcanization accelerator, the production characteristics of various accelerators are fully considered, and the various accelerators are combined and used according to corresponding proportions, so that the advantages of the various accelerators are fully exerted, and the acceleration efficiency under a relatively low temperature condition is effectively improved; the promotion effect is greatly improved, the production cost is reduced, proper processing parameters are adjusted according to the proportion, the production efficiency is improved, the production quality is improved, and environmental protection is achieved.

The invention discloses a TPE / rubber double-color master batch preparation method based on a dynamic vulcanization technology, and belongs to the technical field of high polymer material processing. The preparation method of the TPE / rubber double-color master batch based on the dynamic vulcanization technology comprises the following steps: 1, adding polypropylene, a composite synergist, calcium carbonate and a modified antioxidant into a main feeding port of a double-screw extruder, melting and mixing, adding ethylene propylene diene monomer which is uniformly mixed with paraffin oil and a coloring agent through a side feeding machine, mixing, and carrying out extrusion molding to obtain a master batch; a blend is obtained; 2, sulfur, tetramethyl thiuram disulfide and a silane coupling agent KH-550 are added into the blend through a downstream side feeding port, a dynamic vulcanization reaction is conducted, after the reaction is finished, extrusion, water cooling, grain-sized dicing and drying are conducted, and the TPE / rubber double-color master batch is obtained. The TPE / rubber double-color master batch prepared by the method has excellent mechanical properties, toughness and oxidation resistance.