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Hydrogenated isoprene/styrene block coupling polymer optical cable ointment gelling agent, preparation method thereof and application thereof in optical cable ointment

A technology for hydrogenating isoprene and styrene blocks, which is applied in optics, light guides, optical components, etc., can solve the problems of high molecular weight and affecting the dropping point of copolymers, achieve excellent performance, improve dropping point and dynamic viscosity Effect

Pending Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this patent uses a special mixed solvent composed of non-polar alkanes and toluene, which can effectively reduce or eliminate the content of small molecule polystyrene in two-block or multi-block hydrogenated styrene / isoprene copolymers , but adding styrene in one section, and its molecular weight is large, may cause a part of the styrene to be unreacted, and the unreacted part of styrene and the second section of isoprene are randomly copolymerized, which will affect the application of the copolymer in optical fiber and cable filling. drop point when ointment

Method used

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  • Hydrogenated isoprene/styrene block coupling polymer optical cable ointment gelling agent, preparation method thereof and application thereof in optical cable ointment
  • Hydrogenated isoprene/styrene block coupling polymer optical cable ointment gelling agent, preparation method thereof and application thereof in optical cable ointment

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preparation example Construction

[0059] The preparation method of filling ointment for optical fiber and optical cable: Add 16g of diblock hydrogenated styrene-isoprene and 184g of second base oil into a 500mL beaker, heat and stir in a heating mantle, and control the temperature at 100-120°C until it becomes a uniform viscous ointment.

[0060] The dropping point of optical cable filling ointment shall be measured according to GB 4929-85 standard.

[0061] 300% tensile strength, tensile strength at break, elongation at break, permanent deformation test standard: measured according to GB / T528-92 standard;

[0062] Hardness test standard: measured according to GB / T531-99 standard;

Embodiment 1

[0064] Using the lithium-based initiator anionic polymerization process, add 3000ml cyclohexane to a 5-liter polymerization kettle purified by nitrogen, and add tetrahydrofuran in an amount of 100mg / kg solvent, raise the temperature of the solvent system to 50°C, and add The calculated amount of n-butyllithium is 2.4mmol, and the initiation reaction is carried out by adding 210g pentadiene in one stage, the reaction polymerization temperature is controlled at 50-110°C, and after stirring for 30-60 minutes, styrene will be prepared according to the design (styrene is pentadiene The weight ratio of alkene is 3 / 7) into the active polymer, during which the reaction temperature is controlled at 55-85°C, the reaction is stirred for 30-60min, and about 5ml of ethanol is added to terminate. After the polymerization, the polymer is pressed into 5 liters In the hydrogenation kettle, control the temperature at 50-100°C, add 68mmg methyl benzoate to the hydrogenation kettle, stir for 5-20m...

Embodiment 2

[0071] Adopt lithium series initiator anionic polymerization process, compare with embodiment 1, according to design molecular weight, n-butyllithium add-on is 3.3mmol. The difference is that after the second-stage polymerization reaction is completed, the copolymer is coupled with dichlorodimethylsilane, the addition amount is 1.9mmol, and the coupling temperature is controlled between 50-75°C. The coupling reaction time is about 15-30min. After complete, then add 5ml ethanol to terminate, then according to the hydrogenation process control of embodiment 1, polymer glue liquid is carried out hydrogenation reaction, obtain hydrogenated copolymer, add the antioxidant based on the weight of polymer 0.6% in reaction mixture , and stir for 5 minutes. Finally the product is added to a mixture of steam and water, the solvent is evaporated and the polymer is isolated as a solid suspended in water. The solid is separated, squeezed with a squeeze dehydrator, and devolatilized in a dry...

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Abstract

The invention belongs to the field of filling ointment for optical cables, and particularly discloses a hydrogenated isoprene / styrene block coupled polymer optical cable ointment gelling agent which is a coupled polymer of a multi-hydrogenated polymer arm with a structural formula of (EIS)nM. The invention also provides a preparation method of the coupled polymer, an application of the coupled polymer in filling ink, and an optical cable ointment containing the gelling agent. The invention innovatively provides the coupled polymer with a brand-new form, hydrogenated polymer arms of the coupling polymer are two-block polymer arms of hydrogenated polyisoprene block polystyrene blocks, and the polystyrene blocks are connected to a coupling center (M). The research finds that the polymer with the special structure can show excellent mechanical property and dropping point and has excellent performance when being used as the optical cable ointment gelling agent.

Description

Technical field: [0001] The invention relates to a hydrogenated isoprene / styrene block coupling polymer, a preparation method and application thereof, and belongs to the field of filling ointment for optical cables. Background technique: [0002] With the continuous maturity of communication electric (optical) cable technology, the research on optical cable materials has gradually attracted people's attention, and ointment, as an important part of optical cable materials, plays a role in sealing, moisture-proof, waterproof, buffering, and protection in optical cables. Function, the quality of the ointment directly affects the transmission performance and use performance of the optical cable. The ointment is used as an optical cable protection filling paste, which has thixotropic properties. It is a kind of gelling agent. The gelling agent is divided into inorganic and organic. The agent is mainly composed of fatty acid salts, etc. This material has disadvantages such as poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/04C08F8/04G02B6/44
CPCC08F8/04G02B6/4483C08F297/044
Inventor 黎春荣梁红文杨帆龙锦
Owner CHINA PETROLEUM & CHEM CORP
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