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Terminal-modified conjugated diene-vinyl aromatic copolymer and its synthesis method

A technology based on aromatic hydrocarbon copolymers and vinyl aromatic hydrocarbons, applied in the field of conjugated diene-vinyl aromatic hydrocarbon copolymers and their synthesis, can solve the problems of difficult dispersion of carbon black and achieve excellent rolling resistance and good compatibility performance, excellent wet skid resistance

Inactive Publication Date: 2017-08-04
CHI MEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current modifier used to modify conjugated diene-vinyl aromatic copolymer is formamide, which can improve the dynamic effect of tires, but carbon black is not easy to disperse in formamide-modified conjugated diene -Vinyl aromatic hydrocarbon copolymers, so it is necessary to find another modifier to obtain conjugated diene-vinyl aromatic hydrocarbon copolymers suitable for making tires

Method used

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  • Terminal-modified conjugated diene-vinyl aromatic copolymer and its synthesis method
  • Terminal-modified conjugated diene-vinyl aromatic copolymer and its synthesis method

Examples

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preparation example Construction

[0022] According to an embodiment of the present invention, the synthesis method of the terminal-modified conjugated diene-vinyl aromatic copolymer comprises the following steps:

[0023] (a) reacting a conjugated diene monomer with a vinyl aromatic hydrocarbon monomer to produce a conjugated diene-vinyl aromatic hydrocarbon copolymer;

[0024] (b) reacting the conjugated diene-vinyl aromatic hydrocarbon copolymer with the first modifier to generate an intermediate product; and

[0025] (c) reacting the intermediate product with a second modifying agent to produce an end-modified conjugated diene-vinyl aromatic hydrocarbon copolymer.

[0026] The above steps are described in detail below:

[0027] step (a)

[0028] Step (a) may be carried out by any known method for polymerizing conjugated diene monomers and vinyl aromatic hydrocarbon monomers. For example, a conjugated diene monomer and a vinyl aromatic hydrocarbon monomer may be polymerized in the presence of a polymeriza...

Embodiment 1

[0081] First, 8 kg of cyclohexane was added into the reaction tank as a solvent, and the temperature of the reaction system was maintained at 45°C. Next, 6.4 grams of 2,2-bis(2-tetrahydrofuryl)propane (2,2-di(2-tetrahydrofuryl)propane, DTHFP) was added into the reaction tank as a microstructure modifier. Then, 0.8 g of n-butyllithium (n-BL) was added into the reaction tank as an initiator for the polymerization reaction. Here, the molar ratio of the microstructure modifier to the polymerization initiator is substantially about 2:1. Next, take 447 grams of styrene (styrene) as the vinyl aromatic hydrocarbon monomer, and 1683 grams of butadiene (butadiene) as the conjugated diene monomer, and put them into the reaction tank for polymerization. After that, 74.6 g of butadiene monomer was added for reaction. At this time, after sampling and removing the solvent of the sample, the content of the 1,2 structure in the copolymer was measured by IR or NMR, and it was found that the p...

Embodiment 2-3

[0084] Embodiment 2-3 and comparative example 4-6

[0085] The terminal-modified conjugated diene-vinyl aromatic hydrocarbon copolymers of Examples 2-3 and Comparative Examples 4-6 were prepared in the same steps as Example 1. However, the difference lies in the amount of the first modifying agent and the second modifying agent (as shown in Table 1).

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Abstract

The invention provides a conjugated diene-vinyl arene copolymer modified on a tail end, and a synthetic method thereof. The synthetic method comprises: first, reacting conjugated diene monomer with vinyl arene monomer to generate a conjugated diene-vinyl arene copolymer, then, modifying the conjugated diene-vinyl arene copolymer and adding tin-containing radical on the tail end and -CM-N< linkage radical, wherein M is sulphur atom or oxygen atom. The consistency and mixing homogeneity of the conjugated diene-vinyl arene copolymer modified on the tail end with carbon black are good, so the conjugated diene-vinyl arene copolymer modified on a tail end is suitable to be used to manufacture tires in excellent quality. In addition, a conjugated diene-vinyl arene copolymer modified on a tail end is provided.

Description

technical field [0001] The present invention relates to an olefin polymer, and in particular to a terminal-modified conjugated diene-vinyl aromatic copolymer and a synthesis method thereof. Background technique [0002] The terminally modified conjugated diene-vinyl aromatic copolymer can be used to make tires. Therefore, in order to save energy and consider driving safety, its properties such as rolling resistance and wet skid resistance are very important. The current practice is to add carbon black to the end-modified conjugated diene-vinyl aromatic copolymer to increase the strength of the tire. [0003] The current modifier used to modify conjugated diene-vinyl aromatic copolymer is formamide, which can improve the dynamic effect of tires, but carbon black is not easy to disperse in formamide-modified conjugated diene -Vinyl aromatic hydrocarbon copolymers, so it is necessary to find another modifier to obtain conjugated diene-vinyl aromatic hydrocarbon copolymers suit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/10C08F8/42C08F8/30C08F2/38C08L9/06C08K3/04B60C1/00
Inventor 谢官霖
Owner CHI MEI CORP
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