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Preparation method of polyurethane modified emulsion polymerized styrene-butadiene rubber

A technology for emulsion polystyrene butadiene rubber and polyurethane modification, which is applied in the field of preparation of functionalized polyurethane copolymerized modified styrene butadiene rubber

Active Publication Date: 2020-04-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Up to now, functionalized polyurethane has been directly introduced into the polymerization process to realize the copolymerization of functionalized polyurethane with butadiene and styrene, combining styrene-butadiene rubber and polyurethane from the molecular level, and the vulcanization system of styrene-butadiene rubber is used in the vulcanization process. The research that can vulcanize the material to improve wear resistance, tensile strength and tear strength has not been reported

Method used

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  • Preparation method of polyurethane modified emulsion polymerized styrene-butadiene rubber
  • Preparation method of polyurethane modified emulsion polymerized styrene-butadiene rubber
  • Preparation method of polyurethane modified emulsion polymerized styrene-butadiene rubber

Examples

Experimental program
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Effect test

Embodiment 1

[0045] (1) Polyurethane Modified Emulsion Polystyrene Butadiene Rubber Latex Synthesis

[0046] The prepared disproportionated abietic acid potassium soap, fatty acid potassium soap, diffusing agent (alkyl naphthalene sulfonic acid formaldehyde condensate), potassium chloride, EDTA sodium salt, ferrous sulfate, carved white block, tertiary dodecyl mercaptan, Styrene (30wt%), sodium dithionite, functionalized polyurethane-1 (10wt%) and soft water are injected in the polymerization kettle, wherein, disproportionated abietic acid potassium soap 3.3wt%, fatty acid potassium soap 1.5wt%, replace with nitrogen, pump After vacuum evacuation, butadiene (70 wt%) was added. Start the polymerization kettle stirrer to 300r / min, when the kettle temperature is cooled to 6°C, add dicumyl hydroperoxide (0.06wt%) solution. The temperature of the polymerization reaction was kept constant, and when the conversion rate reached 60-72%, isopropylhydroxylamine was added. The amounts of various add...

Embodiment 2

[0060] (1) Polyurethane Modified Emulsion Polystyrene Butadiene Rubber Latex Synthesis

[0061] The prepared disproportionated abietic acid potassium soap, fatty acid potassium soap, diffusing agent (alkyl naphthalene sulfonic acid formaldehyde condensate), potassium chloride, EDTA sodium salt, ferrous sulfate, carved white block, tertiary dodecyl mercaptan, Styrene (35wt%), sodium dithionite, functionalized polyurethane-2 (14wt%) and soft water are injected in the polymerization kettle, wherein, disproportionated abietic acid potassium soap 4wt%, fatty acid potassium soap 0.5wt%, replace with nitrogen, vacuumize After deoxygenation, butadiene (65 wt %) was added. Start the polymerization kettle stirrer to 200r / min, when the kettle temperature is cooled to 6°C, add dicumyl hydroperoxide (0.07wt%) solution. The temperature of the polymerization reaction was kept constant, and when the conversion rate reached 60-72%, isopropylhydroxylamine was added. The amounts of other vario...

Embodiment 3

[0071] (1) Polyurethane Modified Emulsion Polystyrene Butadiene Rubber Latex Synthesis

[0072] The prepared disproportionated abietic acid potassium soap, fatty acid potassium soap, diffusing agent (alkyl naphthalene sulfonate formaldehyde condensate), potassium chloride, EDTA sodium salt, ferrous sulfate, carved white block, tertiary dodecyl mercaptan, Styrene (40wt%), sodium dithionite, functionalized polyurethane-3 (10wt%) and soft water are injected in the polymerization kettle, wherein, disproportionated abietic acid potassium soap 2.4wt%, fatty acid potassium soap 2.4wt%, replace with nitrogen, vacuum After deoxygenation, butadiene (60 wt %) monomer was added. Start the polymerization kettle stirrer to 250r / min, when the kettle temperature is cooled to 6°C, add hydrogen peroxide to Alkanes (0.06wt%) solution. The temperature of the polymerization reaction was kept constant, and when the conversion rate reached 60-72%, isopropylhydroxylamine was added. The amounts of...

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Abstract

The invention provides a preparation method of a polyurethane modified emulsion polymerized styrene-butadiene rubber, and belongs to the field of chemical technology application. The preparation method comprises: injecting a prepared emulsifier, a dispersing agent, an electrolyte activation phase solution, a regulator, styrene, functionalized polyurethane and soft water into a polymerization kettle, replacing with nitrogen, vacuumizing to discharge oxygen, adding butadiene, starting stirring, controlling the polymerization reaction temperature at 5-10 DEG C, adding an initiator solution, adding a terminating agent when the conversion rate reaches 60-72%, discharging, carrying out condensation, washing, and drying to obtain a sample. Compared with the method of the prior art, the method ofthe invention has the following characteristics that polyurethane molecules are directly introduced in a polymerization process to improve the wear resistance, the tensile strength and the tearing strength of a butadiene styrene rubber, so that a tread rubber material with excellent performance is provided for tire enterprises.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyurethane modified latex polystyrene butadiene rubber, be specifically related to a kind of preparation method of functionalized polyurethane copolymerization modified polystyrene butadiene rubber. Background technique [0002] Emulsion-polymerized styrene-butadiene rubber is a copolymerized rubber in which styrene and butadiene are polymerized by free radicals in an emulsion system, and is usually referred to as emulsion-polymerized styrene-butadiene rubber. Emulsion polystyrene butadiene rubber is one of the most demanded general-purpose synthetic rubber varieties. Its physical and mechanical properties, processing properties and product performance are all close to natural rubber, and it is the backbone product of the rubber industry. Widely used in tires and tire products, footwear, hoses, tapes, auto parts, wires and cables and other industrial rubber products. [0003] In 2017, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/08C08L75/04C08L93/04C08K13/02C08K3/04C08K3/22C08K5/09
CPCC08K2003/2296C08L9/08C08L2205/035C08L75/04C08L93/04C08K13/02C08K3/04C08K3/22C08K5/09
Inventor 燕鹏华李波龚光碧王永峰张华强胡育林梁滔翟云芳邵卫赵志超王奇魏绪玲徐典宏
Owner PETROCHINA CO LTD