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Conjugated-diolefin (co)polymer rubber and process for producing the same

一种共轭二烯烃、制造方法的技术，应用在共轭二烯烃聚橡胶及其制造领域，能够解决门尼粘度经时变化难以抑制、门尼粘度有变动等问题，达到优良耐磨耗性、平衡值提高、门尼粘度的变动小的效果

Active Publication Date: 2006-10-04
ENEOS MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, even in this method, the Mooney viscosity of the polymer produced fluctuates, and the change over time in the Mooney viscosity of the polymer is difficult to suppress

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] Example 1 (manufacture of copolymer rubber A)

[0116] In an autoclave reactor with an inner volume of five liters replaced with nitrogen, 2500 g of cyclohexane, 25 g of tetrahydrofuran, 100 g of styrene, 390 g of 1,3-butadiene, and 0.05 g of divinylbenzene were added. After adjusting the temperature of the contents of the reactor to 10° C., 365 mg of n-butyllithium was added to start the polymerization reaction. The polymerization was carried out adiabatically, reaching a maximum temperature of 85°C.

[0117] When the polymerization conversion rate reaches 99%, further add 10 grams of 1,3-butadiene, and then polymerize for 1 minute, add 50 mg of tin tetrachloride and stir for 3 minutes, then add N,N-bis(trimethyl 2.98 mmol of silyl)aminopropylmethyldiethoxysilane was modified for 15 minutes, and 2,6-di-tert-butyl-p-cresol was added to prepare a polymer solution.

[0118] Then, adjust the pH value of the aqueous solution to 8.5 (the pH value at 80°C, the same below) w...

Embodiment 2

[0119] Example 2 (manufacture of copolymer rubber B)

[0120] In Example 1, except that the aqueous solution adjusted to pH 8.5 with ammonia was replaced by a pH 9.5 aqueous solution, the rest were the same as in Example 1 to obtain a copolymer rubber. Table 1 shows the analytical values ​​of the obtained copolymer rubbers.

Embodiment 3

[0121] Example 3 (manufacture of copolymer rubber C)

[0122] In Example 2, except that NaOH was added as a pH regulator, the rest were the same as in Example 2 to obtain a copolymer rubber. Table 1 shows the analytical values ​​of the obtained copolymer rubbers.

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Abstract

A conjugated diolefin (co)polymer rubber is provided which is small in variations in the Mooney viscosity of the resulting rubber, and in which later changes in the Mooney viscosity with the elapse of time can also be restrained. A conjugated diolefin (co)polymer rubber which is a conjugated diolefin (co)polymer rubber obtained from a conjugated diolefin or a conjugated diolefin and an aromatic vinyl compound, having an alkoxysilyl group and desolvated under alkaline conditions.

Description

technical field [0001] The present invention relates to a conjugated diene (co)polymer rubber having a small variation in Mooney viscosity and a small change in Mooney viscosity with time, and a method for producing the rubber. technical background [0002] Branched conjugated diene (co)polyrubbers useful for automobile tires etc. are generally produced by the presence of conjugated diene alone or an aromatic vinyl compound in the presence of an anionic polymerization initiator Polymerization is carried out under the following conditions, and the obtained active polymer is produced by using a silicon halide compound such as tetrachlorosilane as a coupling agent. However, these coupling agents contain halogen atoms in their reaction sites, and halogen-containing compounds such as LiCl are by-produced after the coupling reaction. Furthermore, the presence of halides in the rubber is also expected to be reduced. [0003] Therefore, various non-halogen-based coupling agents ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/25C08C4/00C08F36/04C08C2/06C08C19/44
CPCC08C19/25C08C19/44C08C2/06C08F36/04
Inventor 谷口孝太突廻惠介小林直一但木稔弘
Owner ENEOS MATERIALS CORP
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