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Method for synthesizing star amphiphilic rubber

A hybrid arm and rubber technology, used in the fields of rubber synthesis and polymer compound synthesis, can solve the problems of cold flow and processing performance, difficult coupling, and the influence of adding methods, etc., to achieve good wet skid resistance, good cold resistance and Abrasion resistance, effect of low rolling resistance

Inactive Publication Date: 2007-10-31
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conversion rate and polymerization temperature in the first tank are difficult to control, and the steric hindrance at the end of the active species is large, which makes it difficult to couple. In the later stage of polymerization, it is difficult to couple due to the increase of the viscosity of the glue, the polymerization temperature and the way of adding the coupling agent. etc. will also affect the coupling efficiency, and will also greatly affect the intrinsic viscosity of the obtained polymer, so it has a greater impact on cold flow and processability

Method used

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  • Method for synthesizing star amphiphilic rubber
  • Method for synthesizing star amphiphilic rubber
  • Method for synthesizing star amphiphilic rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Feeding tubes, absorption bottles, etc. are treated according to the method of anion polymerization to remove impurities, and they are used under nitrogen protection for standby. The 2L polymerization kettle was evacuated and filled with nitrogen repeatedly three times to maintain the nitrogen atmosphere. Add 700 ml of isoprene cyclohexane solution (concentration: 10 g isoprene / 100 ml hexane) into the absorption bottle, add 0.875 mmol of tetrahydrofuran to adjust the structure, shake well, add 0.875 mmol of n-butyllithium to initiate , Add the solution to the reactor and polymerize at 70°C.

[0033] After polymerization for 1 hour, 0.35 mmol of divinylbenzene was added to the kettle for coupling after monomer conversion was complete.

[0034] After 1.5 hours, 700 ml of cyclohexane solution (concentration of 10 g monomer / 100 ml hexane) with 50 / 50 mass ratio of butadiene / styrene containing 0.4375 mmol of tetramethylethylene diammonium was added to the reactor Polymeriza...

example 2

[0038] Feeding tubes, absorption bottles, etc. are treated according to the method of anion polymerization to remove impurities, and they are used under nitrogen protection for standby. The 2L polymerization kettle was evacuated and filled with nitrogen repeatedly three times to maintain the nitrogen atmosphere. Add 700ml of cyclohexane solution of isoprene to the absorption bottle (concentration is 10g isoprene / 100ml cyclohexane, hexane mixture), add 0.875 mmol of tetrahydrofuran to adjust the structure, shake well, add 0.875 mmol Initiated by n-butyllithium, the solution was added to the reactor and polymerized at 90°C.

[0039] After polymerization for 2 hours, 0.44 mmol of divinylbenzene was added to the kettle for coupling after monomer conversion was complete.

[0040] After 1 hour, 700ml of a cyclohexane solution (concentration of 10g monomer / 100ml cyclohexane and hexane mixture) with a mass ratio of butadiene / styrene containing 35 mmoles of tetrahydrofuran was added t...

example 3

[0044] Feeding tubes, absorption bottles, etc. are treated according to the method of anion polymerization to remove impurities, and they are used under nitrogen protection for standby. The 2L polymerization kettle was evacuated and filled with nitrogen repeatedly three times to maintain the nitrogen atmosphere. Add 700ml of isoprene cyclohexane solution (concentration: 10g isoprene / 100ml cyclohexane) into the absorption bottle, add 0.875 mmol of tetrahydrofuran to adjust the structure, shake well, add 0.875 mmol of n-butyllithium Initiate, add the solution to the reactor and polymerize at 50°C.

[0045] After polymerization for 1.5 hours, 0.66 millimoles of divinylbenzene was added to the kettle for coupling after the conversion of the monomers was complete.

[0046] After 0.5 hour, the butadiene / styrene mass ratio that will contain 0.088 mmol sodium lauryl sulfate, 0.088 mmol pentamethyldivinyl triamine is the cyclohexyl solution (concentration is 10g) of 75 / 25 Monomer / 100...

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Abstract

The invention discloses a synthetic method of star type mixed arm rubber in rubber synthetic domain, which is characterized by the following: synthesizing mixed arm polymer with different structure modifier, different monomer proportion and different component structure. This product possesses better cold endurance, abradability and better wet skid resistance, which method is simple and easy to operation.

Description

technical field [0001] The invention relates to the field of polymer compound synthesis, in particular to the field of rubber synthesis. Background technique [0002] The current energy and environmental issues are two important issues facing mankind. In the rubber industry, reducing the rolling resistance of automotive tires has become an important performance requirement. With the rapid development of the automobile industry, the requirements for many other important properties of tires are also higher and more comprehensive, such as wet skid resistance (safety), wear resistance (durability) and so on. Studies have shown that there are obvious contradictions among the performances of various general-purpose tread rubbers in the past. Rubber with low rolling resistance and good wear resistance has poor wet skid resistance, and vice versa. It has been found in the research that the balance of various properties can indeed be achieved by blending various rubber materials w...

Claims

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Application Information

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IPC IPC(8): C08F236/08C08F4/48C08F2/06C08F2/38
Inventor 韩丙勇牛国臣吴有平胡才仲陶惠平龚光碧
Owner PETROCHINA CO LTD
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