A kind of polyconjugated diene/sbs composite rubber particle and its preparation method and the application of composite rubber particle in modified asphalt

A technology of polyconjugated diene and composite rubber, which is applied to the field of modified asphalt in the field of composite rubber particles composed of SBS rubber, which can solve the problems of unreported

Active Publication Date: 2020-10-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the relevant literature and products of rubber composite thermoplastic elastomers (SBS) such as polyisoprene (IR), random or block polyisoprene-butadiene (IBR), and such composite materials are synthesized by anionic polymerization. The relevant research on modified asphalt has not been reported

Method used

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  • A kind of polyconjugated diene/sbs composite rubber particle and its preparation method and the application of composite rubber particle in modified asphalt
  • A kind of polyconjugated diene/sbs composite rubber particle and its preparation method and the application of composite rubber particle in modified asphalt
  • A kind of polyconjugated diene/sbs composite rubber particle and its preparation method and the application of composite rubber particle in modified asphalt

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Experimental program
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Effect test

Embodiment 1

[0059] Add 3500mL of anhydrous cyclohexane and 0.04mL of anisole into a 5-liter polymerization kettle, stir and when the temperature rises to 50-60°C, add 50g of styrene, and then add 7.5mL of 0.66mol / L sec-butyllithium with a syringe Initiate styrene, react for 20min to 25min, then inject 483mL (300g) of butadiene into the second stage of reaction with nitrogen pressure, control the temperature below 95°C and react for 25min to 30min, then add 50g of styrene for the third stage After 20 minutes to 25 minutes of polymerization reaction, the SBS glue with a mass concentration of 12.8wt% cyclohexane solution was obtained, and Mn=86000 and MFR=8.43g / 10min were measured.

Embodiment 2

[0061] Add 3500 mL of anhydrous cyclohexane in a 5-liter polymerization kettle, then add 0.03 mL of divinylbenzene and 0.04 mL of anisole with a syringe, and simultaneously inject 485 mL of butadiene monomer into the polymerization kettle with nitrogen pressure, Add 6.5mL of 0.66mol / L sec-butyllithium into the polymerization kettle with a syringe at a temperature of 50-60°C, keep the polymerization temperature <90°C, and obtain a mass concentration of 9.90wt% polybutadiene cyclohexane after the polymerization time is 30min solution. The average Mn of polybutadiene (BDR) is 235000, the 1,4-addition content is 94.7%, the raw rubber Tg=-98.6°C, the Mooney viscosity is ML=66.4, and the raw rubber strength is 0.41MPa.

Embodiment 3

[0063] Add 3500mL of anhydrous cyclohexane into a 5-liter polymerization kettle, then add 0.06mL of divinylbenzene and 0.05mL of anisole with a syringe, and simultaneously inject 440mL of isoprene monomer into the polymerization kettle with nitrogen pressure Add 4.5mL of 0.66mol / L sec-butyllithium into the polymerization kettle with a syringe at a temperature of 50-60°C, keep the polymerization temperature <90°C, and obtain a mass concentration of 9.8wt% polyisoprene rings after the polymerization time is 35min. Hexane solution. The average Mn of polyisoprene (IDR) was measured to be 364000, the 1,4-addition content was 88.3%, the raw rubber Tg=-61.3°C, the Mooney viscosity was ML=68.4, and the raw rubber strength was 0.84MPa.

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Abstract

The invention discloses a polyconjugated diene / SBS composite rubber particle and a preparation method thereof and application of the composite rubber particle in modified asphalt. The preparation method of the polyconjugated diene / SBS composite rubber particle comprises the following steps: uniformly mixing a polyconjugated dieneglue solution and a SBS glue solution, and carrying out coagulation, expansion drying and granulation to obtain the composite rubber particle. The composite rubber particle will not cold-flow and is non-sticky at room temperature, shows good autohension under the action of rubber oil, is used for modified asphalt materials, and shows low low-temperature performance, excellent processability and good physical properties. In addition, the preparation method of the composite rubber particle is simple, cost is low, process conditions are mature, especially there is no dust pollution, and the method is beneficial to industrial production.

Description

technical field [0001] The invention relates to a polyconjugated diene / SBS composite rubber particle and its preparation method and the application of the composite rubber particle in modified asphalt, in particular to the preparation of polyconjugated diene rubber and SBS rubber by anionic polymerization, and more to polyconjugated diene rubber and SBS rubber. The application of composite rubber particles composed of conjugated diene rubber and SBS rubber in modified asphalt materials belongs to the technical field of modified asphalt preparation. Background technique [0002] The rubber used for self-adhesive modified asphalt waterproofing membranes is usually styrene-butadiene rubber elastomers such as SBS and powdered styrene-butadiene rubber (PSBR). PSBR is usually produced by mechanical pulverization. The pulverization method is to pass block rubber through a fixed knife or The crushing machine of the flying knife is crushed to a suitable particle size, and then sieved...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/02C08L9/00C08L95/00C08L91/00C08F297/04C08F236/10C08F2/38
CPCC08F236/10C08F297/046C08L9/00C08L53/02C08L95/00C08L2205/035C08L91/00C08F2/38
Inventor 张建国佘振银贺卉昌蒋文英许安军
Owner CHINA PETROLEUM & CHEM CORP
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